mirror of
https://github.com/byteworksinc/ORCA-C.git
synced 2024-12-22 07:30:54 +00:00
fb612e14d1
This bug occurred because the generated code tried to store part of the return address to a direct page offset of 256, but instead an offset of 0 was used, resulting in an invalid return address and (typically) a crash. It could occur if the function took one or more parameters, and the total size of parameters and local variables (including compiler-generated ones) was 254 bytes.
The following program demonstrates the problem:
int main(int argc, char **argv) {
char x[244];
}
5661 lines
175 KiB
ObjectPascal
5661 lines
175 KiB
ObjectPascal
{$optimize 7}
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{---------------------------------------------------------------}
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{ }
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{ Gen }
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{ }
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{ Generates native code from intermediate code instructions. }
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{ }
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{---------------------------------------------------------------}
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unit Gen;
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interface
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{$segment 'gen'}
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{$LibPrefix '0/obj/'}
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uses CCommon, CGI, CGC, ObjOut, Native;
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{---------------------------------------------------------------}
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function LabelToDisp (lab: integer): integer;
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{ convert a local label number to a stack frame displacement }
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{ }
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{ parameters: }
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{ lab - label number }
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procedure Gen (blk: blockPtr);
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{ Generates native code for a list of blocks }
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{ }
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{ parameters: }
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{ blk - first of the list of blocks }
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{---------------------------------------------------------------}
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implementation
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const
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A_X = 1; {longword locations}
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onStack = 2;
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inPointer = 4;
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localAddress = 8;
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globalLabel = 16;
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constant = 32;
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{stack frame locations}
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{---------------------}
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returnSize = 3; {size of return address}
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type
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{possible locations for 4 byte values}
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longType = record {desciption of current four byte value}
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preference: integer; {where you want the value}
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where: integer; {where the value is at}
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fixedDisp: boolean; {is the displacement a fixed value?}
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isLong: boolean; {is long addr required for named labs?}
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disp: integer; {fixed displacement/local addr}
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lval: longint; {value}
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lab: stringPtr; {global label name}
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end;
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var
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gLong: longType; {info about last long value}
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namePushed: boolean; {has a name been pushed in this proc?}
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skipLoad: boolean; {skip load for a pc_lli, etc?}
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{stack frame locations}
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{---------------------}
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bankLoc: integer; {disp in dp where bank reg is stored}
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dworkLoc: integer; {disp in dp of 4 byte work spage for cg}
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funLoc: integer; {loc of fn ret value in stack frame}
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localSize: integer; {local space for current proc}
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parameterSize: integer; {# bytes of parameters for current proc}
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stackLoc: integer; {disp in dp where stack reg is stored}
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{---------------------------------------------------------------}
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procedure GenTree (op: icptr); forward;
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procedure OperA (mop: integer; op: icptr);
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{ Do an operation on op that has addr modes equivalent to STA }
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{ }
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{ parameters: }
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{ op - node to generate the leaf for }
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{ mop - operation }
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var
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loc: integer; {stack frame position}
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opcode: pcodes; {temp storage}
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begin {OperA}
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opcode := op^.opcode;
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case opcode of
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pc_ldo,pc_gil,pc_gli,pc_gdl,pc_gld: begin
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case mop of
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m_cmp_imm: mop := m_cmp_abs;
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m_adc_imm: mop := m_adc_abs;
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m_and_imm: mop := m_and_abs;
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m_ora_imm: mop := m_ora_abs;
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m_sbc_imm: mop := m_sbc_abs;
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m_eor_imm: mop := m_eor_abs;
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otherwise: Error(cge1);
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end; {case}
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if opcode = pc_gil then
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GenNative(m_inc_abs, absolute, op^.q, op^.lab, 0)
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else if opcode = pc_gdl then
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GenNative(m_dec_abs, absolute, op^.q, op^.lab, 0);
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if smallMemoryModel then
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GenNative(mop, absolute, op^.q, op^.lab, 0)
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else
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GenNative(mop+2, longAbs, op^.q, op^.lab, 0);
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if opcode in [pc_gli,pc_gld] then begin
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if mop in [m_sbc_dir,m_cmp_dir] then
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GenImplied(m_php);
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if opcode = pc_gli then
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GenNative(m_inc_abs, absolute, op^.q, op^.lab, 0)
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else {if opcode = pc_gld then}
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GenNative(m_dec_abs, absolute, op^.q, op^.lab, 0);
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if mop in [m_sbc_dir,m_cmp_dir] then
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GenImplied(m_plp);
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end; {else}
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end; {case pc_ldo,pc_gil,pc_gli,pc_gdl,pc_gld}
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pc_lod,pc_lli,pc_lil,pc_lld,pc_ldl: begin
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case mop of
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m_cmp_imm: mop := m_cmp_dir;
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m_adc_imm: mop := m_adc_dir;
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m_and_imm: mop := m_and_dir;
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m_ora_imm: mop := m_ora_dir;
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m_sbc_imm: mop := m_sbc_dir;
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m_eor_imm: mop := m_eor_dir;
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otherwise: Error(cge1);
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end; {case}
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loc := LabelToDisp(op^.r);
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if opcode = pc_lod then
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loc := loc + op^.q;
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if opcode = pc_lil then
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GenNative(m_inc_dir, direct, loc, nil, 0)
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else if opcode = pc_ldl then
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GenNative(m_dec_dir, direct, loc, nil, 0);
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GenNative(mop, direct, loc, nil, 0);
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if opcode in [pc_lli,pc_lld] then begin
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if mop in [m_sbc_dir,m_cmp_dir] then
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GenImplied(m_php);
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if opcode = pc_lli then
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GenNative(m_inc_dir, direct, loc, nil, 0)
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else {if opc = pc_lld then}
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GenNative(m_dec_dir, direct, loc, nil, 0);
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if mop in [m_sbc_dir,m_cmp_dir] then
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GenImplied(m_plp);
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end; {else}
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end; {case pc_lod,pc_lli,pc_lil,pc_lld,pc_ldl}
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pc_ldc:
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GenNative(mop, immediate, op^.q, nil, 0);
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otherwise:
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Error(cge1);
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end; {case}
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end; {OperA}
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function Complex (op: icptr): boolean;
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{ determine if loading the intermediate code involves anything }
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{ but one reg }
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{ }
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{ parameters: }
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{ code - intermediate code to check }
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{ }
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{ NOTE: for one and two byte values only!!! }
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begin {Complex}
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Complex := true;
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if op^.opcode in [pc_ldo,pc_ldc] then
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Complex := false
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else if op^.opcode in [pc_gil,pc_gli,pc_gdl,pc_gld] then
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Complex := smallMemoryModel
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else if op^.opcode = pc_lod then
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if LabelToDisp(op^.r) + op^.q < 256 then
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Complex := false
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else if op^.opcode in [pc_lli,pc_lil,pc_ldl,pc_lld] then
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if LabelToDisp(op^.r) < 256 then
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Complex := false;
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if op^.optype in [cgByte,cgUByte] then
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Complex := true;
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end; {Complex}
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procedure DoOp(op_imm, op_abs, op_dir: integer; icode: icptr; disp: integer);
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{ Do an operation. }
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{ }
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{ Parameters: }
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{ op_imm,op_abs,op_dir - op codes for the various }
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{ addressing modes }
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{ icode - intermediate code record }
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{ disp - disp past the location (1 or 2) }
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var
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val: integer; {value for immediate operations}
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lval: longint; {long value for immediate operations}
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begin {DoOp}
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if icode^.opcode = pc_ldc then begin
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lval := icode^.lval;
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if disp = 0 then
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val := long(lval).lsw
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else
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val := long(lval).msw;
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GenNative(op_imm, immediate, val, nil, 0);
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end {if}
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else if icode^.opcode in [pc_lod,pc_str] then
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GenNative(op_dir, direct, LabelToDisp(icode^.r) + icode^.q + disp, nil, 0)
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else {if icode^.opcode in [pc_ldo, pc_sro] then}
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GenNative(op_abs, absolute, icode^.q + disp, icode^.lab, 0);
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end; {DoOp}
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procedure GetPointer (op: icptr);
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{ convert a tree into a usable pointer for indirect }
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{ loads/stores }
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{ }
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{ parameters: }
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{ op - pointer tree }
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begin {GetPointer}
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gLong.preference := A_X+inPointer+localAddress+globalLabel;
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GenTree(op);
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if gLong.where = onStack then begin
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GenImplied(m_pla);
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GenImplied(m_plx);
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gLong.where := A_X;
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end; {if}
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if gLong.where = A_X then begin
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GenNative(m_sta_dir, direct, dworkLoc, nil, 0);
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GenNative(m_stx_dir, direct, dworkLoc+2, nil, 0);
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gLong.where := inPointer;
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gLong.fixedDisp := true;
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gLong.disp := dworkLoc;
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end; {else if}
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end; {GetPointer}
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procedure IncAddr (size: integer);
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{ add a two byte constant to a four byte value - generally an }
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{ address }
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{ }
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{ parameters: }
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{ size - integer to add }
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var
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lab1: integer; {branch point}
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begin {IncAddr}
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if size <> 0 then
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case gLong.where of
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onStack: begin
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lab1 := GenLabel;
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GenImplied(m_pla);
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if size = 1 then begin
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GenImplied(m_ina);
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GenNative(m_bne, relative, lab1, nil, 0);
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end {if}
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else begin
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GenImplied(m_clc);
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GenNative(m_adc_imm, immediate, size, nil, 0);
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GenNative(m_bcc, relative, lab1, nil, 0);
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end; {else}
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GenImplied(m_plx);
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GenImplied(m_inx);
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GenImplied(m_phx);
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GenLab(lab1);
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GenImplied(m_pha);
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end;
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A_X: begin
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lab1 := GenLabel;
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if size = 1 then begin
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GenImplied(m_ina);
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GenNative(m_bne, relative, lab1, nil, 0);
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end {if}
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else begin
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GenImplied(m_clc);
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GenNative(m_adc_imm, immediate, size, nil, 0);
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GenNative(m_bcc, relative, lab1, nil, 0);
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end; {else}
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GenImplied(m_inx);
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GenLab(lab1);
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end;
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inPointer:
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if gLong.fixedDisp then begin
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gLong.fixedDisp := false;
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GenNative(m_ldy_imm, immediate, size, nil, 0);
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end {if}
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else if size <= 4 then begin
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while size <> 0 do begin
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GenImplied(m_iny);
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size := size - 1;
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end; {while}
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end {else if}
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else begin
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GenImplied(m_tya);
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GenImplied(m_clc);
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GenNative(m_adc_imm, immediate, size, nil, 0);
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GenImplied(m_tay);
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end; {else}
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localAddress,globalLabel:
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gLong.disp := gLong.disp+size;
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otherwise:
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Error(cge1);
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end; {case}
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end; {IncAddr}
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procedure LoadX (op: icptr);
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{ Load X with a two byte value }
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{ }
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{ parameters: }
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{ op - value to load }
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var
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q, r: integer;
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lab: stringPtr;
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begin {LoadX}
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q := op^.q;
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r := op^.r;
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lab := op^.lab;
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case op^.opcode of
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pc_lao,pc_lda:
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Error(cge1);
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pc_ldc:
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GenNative(m_ldx_imm, immediate, q, nil, 0);
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pc_ldo:
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GenNative(m_ldx_abs, absolute, q, lab, 0);
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pc_gli: begin
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GenNative(m_ldx_abs, absolute, q, lab, 0);
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GenNative(m_inc_abs, absolute, q, lab, 0);
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end; {if}
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pc_gil: begin
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GenNative(m_inc_abs, absolute, q, lab, 0);
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GenNative(m_ldx_abs, absolute, q, lab, 0);
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end; {if}
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pc_gld: begin
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GenNative(m_ldx_abs, absolute, q, lab, 0);
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GenNative(m_dec_abs, absolute, q, lab, 0);
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end; {if}
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pc_gdl: begin
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GenNative(m_dec_abs, absolute, q, lab, 0);
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GenNative(m_ldx_abs, absolute, q, lab, 0);
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end; {if}
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pc_lod:
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GenNative(m_ldx_dir, direct, LabelToDisp(r) + q, nil, 0);
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pc_lli: begin
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GenNative(m_ldx_dir, direct, LabelToDisp(r), nil, 0);
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GenNative(m_inc_dir, direct, LabelToDisp(r), nil, 0);
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end; {if}
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pc_lil: begin
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GenNative(m_inc_dir, direct, LabelToDisp(r), nil, 0);
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GenNative(m_ldx_dir, direct, LabelToDisp(r), nil, 0);
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end; {if}
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pc_lld: begin
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GenNative(m_ldx_dir, direct, LabelToDisp(r), nil, 0);
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GenNative(m_dec_dir, direct, LabelToDisp(r), nil, 0);
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end; {if}
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pc_ldl: begin
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GenNative(m_dec_dir, direct, LabelToDisp(r), nil, 0);
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GenNative(m_ldx_dir, direct, LabelToDisp(r), nil, 0);
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end; {if}
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otherwise:
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Error(cge1);
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end; {case}
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end; {LoadX}
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function NeedsCondition (opcode: pcodes): boolean;
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{ See if the operation is one that doesn't set the condition }
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{ code reliably }
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{ }
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{ Parameters: }
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{ opcodes - operation to check }
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{ }
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{ Returns: True if the condition code is not set properly for }
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{ an operand type of cgByte,cgUByte,cgWord,cgUWord, else }
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{ false }
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begin {NeedsCondition}
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NeedsCondition := opcode in
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[pc_and,pc_ior,pc_cui,pc_cup,pc_lor,pc_lnd,pc_ldl,pc_lil,pc_lld,
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pc_lli,pc_gil,pc_gli,pc_gdl,pc_gld,pc_iil,pc_ili,pc_idl,pc_ild,
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pc_cop,pc_cpo,pc_cpi,pc_dvi,pc_mpi,pc_adi,pc_sbi,pc_mod,pc_bno];
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end; {NeedsCondition}
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function SameLoc (load, save: icptr): boolean;
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{ See if load and save represent the same location (which must }
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{ be a direct page value or a global label). }
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{ }
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{ parameters: }
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{ load - load operation }
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{ save - save operation }
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{ }
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{ Returns: True the the same location is used, else false }
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begin {SameLoc}
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SameLoc := false;
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if save <> nil then begin
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if load^.opcode = pc_lod then begin
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if LabelToDisp(load^.r) + load^.q < 254 then
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if save^.opcode = pc_str then
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if save^.q = load^.q then
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if save^.r = load^.r then
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SameLoc := true;
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end {if}
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else if smallMemoryModel then
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if load^.opcode = pc_ldo then
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if save^.opcode = pc_sro then
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if load^.lab^ = save^.lab^ then
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if load^.q = save^.q then
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SameLoc := true;
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end; {if}
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end; {SameLoc}
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procedure SaveRetValue (optype: baseTypeEnum);
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{ save a value returned by a function }
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{ }
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{ parameters: }
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{ optype - function type }
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begin {SaveRetValue}
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if optype in [cgLong,cgULong] then begin
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if (A_X & gLong.preference) = 0 then begin
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gLong.where := onStack;
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GenImplied(m_phx);
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GenImplied(m_pha);
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end
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else
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gLong.where := A_X;
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end {if}
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else if optype in [cgReal,cgDouble,cgExtended,cgComp] then
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GenCall(8);
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end; {SaveRetValue}
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procedure GenAdlSbl (op, save: icptr);
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{ generate code for pc_adl, pc_sbl }
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{ }
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{ parameters: }
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{ op - pc_adl or pc_sbl operation }
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{ save - save location (pc_str or pc_sro) or nil }
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var
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bcc,clc,adc_imm,inc_dir,adc_abs, {for op-code insensitive code}
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adc_dir,inc_abs,adc_s: integer;
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disp: integer; {direct page location}
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lab1: integer; {label number}
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lLong: longType; {used to reserve gLong}
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nd: icptr; {for swapping left/right children}
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opcode: pcodes; {temp storage; for efficiency}
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simpleStore: boolean; {is the store absolute or direct?}
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val: longint; {long constant value}
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function Simple (icode: icptr): boolean;
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{ See if the intermediate code is simple; i.e., can be }
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{ reached by direct page or absolute addressing. }
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var
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load: icptr; {left opcode}
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begin {Simple}
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Simple := false;
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if icode^.opcode = pc_ldc then
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Simple := true
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else if icode^.opcode in [pc_lod,pc_str] then begin
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if LabelToDisp(icode^.r) + icode^.q < 254 then
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Simple := true;
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end {else if}
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else if icode^.opcode in [pc_ldo,pc_sro] then
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Simple := smallMemoryModel;
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end; {Simple}
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begin {GenAdlSbl}
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{determine where the result goes}
|
|
if save <> nil then
|
|
gLong.preference :=
|
|
A_X+onStack+inPointer+localAddress+globalLabel+constant;
|
|
lLong := gLong;
|
|
|
|
{set up the master instructions}
|
|
opcode := op^.opcode;
|
|
if opcode = pc_adl then begin
|
|
clc := m_clc;
|
|
bcc := m_bcc;
|
|
adc_imm := m_adc_imm;
|
|
adc_abs := m_adc_abs;
|
|
adc_dir := m_adc_dir;
|
|
adc_s := m_adc_s;
|
|
inc_dir := m_inc_dir;
|
|
inc_abs := m_inc_abs;
|
|
end {if}
|
|
else begin
|
|
clc := m_sec;
|
|
bcc := m_bcs;
|
|
adc_imm := m_sbc_imm;
|
|
adc_abs := m_sbc_abs;
|
|
adc_dir := m_sbc_dir;
|
|
adc_s := m_sbc_s;
|
|
inc_dir := m_dec_dir;
|
|
inc_abs := m_dec_abs;
|
|
end; {else}
|
|
|
|
{if the lhs is a constant, swap the nodes}
|
|
if ((op^.left^.opcode = pc_ldc) and (opcode = pc_adl)) then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
|
|
{handle a constant rhs}
|
|
if op^.right^.opcode = pc_ldc then
|
|
val := op^.right^.lval
|
|
else
|
|
val := -1;
|
|
if SameLoc(op^.left, save) and (long(val).msw = 0) then begin
|
|
lab1 := GenLabel;
|
|
if val = 1 then begin
|
|
if opcode = pc_adl then begin
|
|
DoOp(0, m_inc_abs, m_inc_dir, op^.left, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
DoOp(0, m_inc_abs, m_inc_dir, op^.left, 2);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else {if opcode = pc_sbl then} begin
|
|
DoOp(m_lda_imm, m_lda_abs, m_lda_dir, op^.left, 0);
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
DoOp(0, m_dec_abs, m_dec_dir, op^.left, 0);
|
|
GenLab(lab1);
|
|
DoOp(0, m_dec_abs, m_dec_dir, op^.left, 2);
|
|
end; {else}
|
|
end {if}
|
|
else begin {rhs in [2..65535]}
|
|
GenImplied(clc);
|
|
DoOp(m_lda_imm, m_lda_abs, m_lda_dir, op^.left, 0);
|
|
GenNative(adc_imm, immediate, long(val).lsw, nil, 0);
|
|
DoOp(0, m_sta_abs, m_sta_dir, op^.left, 0);
|
|
GenNative(bcc, relative, lab1, nil, 0);
|
|
if opcode = pc_adl then
|
|
DoOp(0, m_inc_abs, m_inc_dir, op^.left, 2)
|
|
else
|
|
DoOp(0, m_dec_abs, m_dec_dir, op^.left, 2);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
end {if constant rhs}
|
|
|
|
else begin
|
|
simpleStore := false;
|
|
if save <> nil then
|
|
simpleStore := Simple(save);
|
|
if (opcode = pc_adl) and Simple(op^.left) then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
if simpleStore and Simple(op^.right) then begin
|
|
if Simple(op^.left) then begin
|
|
GenImplied(clc);
|
|
DoOp(m_lda_imm, m_lda_abs, m_lda_dir, op^.left, 0);
|
|
DoOp(adc_imm, adc_abs, adc_dir, op^.right, 0);
|
|
DoOp(0, m_sta_abs, m_sta_dir, save, 0);
|
|
DoOp(m_lda_imm, m_lda_abs, m_lda_dir, op^.left, 2);
|
|
DoOp(adc_imm, adc_abs, adc_dir, op^.right, 2);
|
|
DoOp(0, m_sta_abs, m_sta_dir, save, 2);
|
|
end {if}
|
|
else begin
|
|
gLong.preference := A_X;
|
|
GenTree(op^.left);
|
|
GenImplied(clc);
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pla);
|
|
DoOp(adc_imm, adc_abs, adc_dir, op^.right, 0);
|
|
DoOp(0, m_sta_abs, m_sta_dir, save, 0);
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pla)
|
|
else
|
|
GenImplied(m_txa);
|
|
DoOp(adc_imm, adc_abs, adc_dir, op^.right, 2);
|
|
DoOp(0, m_sta_abs, m_sta_dir, save, 2);
|
|
end; {else}
|
|
end {if}
|
|
else if Simple(op^.right) then begin
|
|
gLong.preference := gLong.preference & A_X;
|
|
GenTree(op^.left);
|
|
GenImplied(clc);
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
DoOp(adc_imm, adc_abs, adc_dir, op^.right, 0);
|
|
GenImplied(m_pha);
|
|
GenNative(m_lda_s, direct, 3, nil, 0);
|
|
DoOp(adc_imm, adc_abs, adc_dir, op^.right, 2);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
end {if}
|
|
else begin
|
|
DoOp(adc_imm, adc_abs, adc_dir, op^.right, 0);
|
|
GenImplied(m_tay);
|
|
GenImplied(m_txa);
|
|
DoOp(adc_imm, adc_abs, adc_dir, op^.right, 2);
|
|
GenImplied(m_tax);
|
|
GenImplied(m_tya);
|
|
end; {else}
|
|
end {else if}
|
|
else begin {doing it the hard way}
|
|
gLong.preference := onStack;
|
|
GenTree(op^.right);
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
GenImplied(clc);
|
|
GenImplied(m_pla);
|
|
GenNative(adc_s, direct, 3, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
GenImplied(m_pla);
|
|
GenNative(adc_s, direct, 3, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
if save = nil then
|
|
gLong.where := onStack
|
|
else if save^.opcode = pc_str then begin
|
|
disp := LabelToDisp(save^.r) + save^.q;
|
|
if disp < 254 then begin
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dir, direct, disp+2, nil, 0);
|
|
end {else if}
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dirX, direct, 2, nil, 0);
|
|
end; {else}
|
|
end {else if}
|
|
else {if save^.opcode = pc_sro then} begin
|
|
GenImplied(m_pla);
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, save^.q, save^.lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, save^.q, save^.lab, 0);
|
|
GenImplied(m_pla);
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, save^.q+2, save^.lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, save^.q+2, save^.lab, 0);
|
|
end; {else}
|
|
end; {else}
|
|
end; {else}
|
|
end; {GenAdlSbl}
|
|
|
|
|
|
procedure GenCmp (op: icptr; rOpcode: pcodes; lb: integer);
|
|
|
|
{ generate code for pc_les, pc_leq, pc_grt or pc_geq }
|
|
{ }
|
|
{ parameters: }
|
|
{ op - operation }
|
|
{ rOpcode - Opcode that will use the result of the }
|
|
{ compare. If the result is used by a tjp or fjp, }
|
|
{ this procedure generated special code and does the }
|
|
{ branch internally. }
|
|
{ lb - For fjp, tjp, this is the label to branch to if }
|
|
{ the condition is satisfied. }
|
|
|
|
var
|
|
i: integer; {loop variable}
|
|
lab1,lab2,lab3,lab4: integer; {label numbers}
|
|
num: integer; {constant to compare to}
|
|
|
|
|
|
procedure Switch;
|
|
|
|
{ switch the operands }
|
|
|
|
var
|
|
nd: icptr; {used to switch nodes}
|
|
|
|
begin {Switch}
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {Switch}
|
|
|
|
begin {GenCmp}
|
|
{To reduct the number of possibilities that must be handled, pc_les }
|
|
{and pc_leq compares are reduced to their equivalent pc_grt and }
|
|
{pc_geq instructions. }
|
|
if op^.opcode = pc_les then begin
|
|
Switch;
|
|
op^.opcode := pc_grt;
|
|
end {if}
|
|
else if op^.opcode = pc_leq then begin
|
|
Switch;
|
|
op^.opcode := pc_geq;
|
|
end; {else if}
|
|
|
|
{To take advantage of shortcuts, switch operands if generating }
|
|
{for a tjp or fjp with a constant left operand. }
|
|
if op^.optype in [cgByte,cgUByte,cgWord,cgUWord] then
|
|
if op^.left^.opcode = pc_ldc then
|
|
if rOpcode in [pc_tjp,pc_fjp] then begin
|
|
if op^.opcode = pc_geq then
|
|
op^.opcode := pc_grt
|
|
else
|
|
op^.opcode := pc_geq;
|
|
if rOpcode = pc_tjp then
|
|
rOpcode := pc_fjp
|
|
else
|
|
rOpcode := pc_tjp;
|
|
Switch;
|
|
end; {if}
|
|
|
|
{Short cuts are available for single-word operands where the }
|
|
{right operand is a constant. }
|
|
if (op^.optype in [cgByte,cgUByte,cgWord,cgUWord]) and
|
|
(op^.right^.opcode = pc_ldc) then begin
|
|
GenTree(op^.left);
|
|
num := op^.right^.q;
|
|
lab1 := GenLabel;
|
|
if rOpcode = pc_fjp then begin
|
|
if op^.optype in [cgByte,cgWord] then begin
|
|
if NeedsCondition(op^.left^.opcode) then
|
|
GenImplied(m_tax);
|
|
if (num >= 0) and (num < 4) then begin
|
|
if op^.opcode = pc_geq then begin
|
|
if num <> 0 then begin
|
|
lab2 := GenLabel;
|
|
GenNative(m_bmi, relative, lab2, nil, 0);
|
|
for i := 1 to num do
|
|
GenImplied(m_dea);
|
|
end; {if}
|
|
GenNative(m_bpl, relative, lab1, nil, 0);
|
|
if num <> 0 then
|
|
GenLab(lab2);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else {if opcode = pc_grt then} begin
|
|
lab2 := GenLabel;
|
|
GenNative(m_bmi, relative, lab2, nil, 0);
|
|
for i := 0 to num do
|
|
GenImplied(m_dea);
|
|
GenNative(m_bpl, relative, lab1, nil, 0);
|
|
GenLab(lab2);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end; {else if}
|
|
end {if (num >= 0) and (num < 4)}
|
|
else begin
|
|
lab2 := GenLabel;
|
|
if num > 0 then
|
|
GenNative(m_bmi, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(m_bpl, relative, lab1, nil, 0);
|
|
GenNative(m_cmp_imm, immediate, num, nil, 0);
|
|
if op^.opcode = pc_grt then begin
|
|
lab3 := GenLabel;
|
|
GenNative(m_beq, relative, lab3, nil, 0);
|
|
GenNative(m_bcs, relative, lab2, nil, 0);
|
|
GenLab(lab3);
|
|
end
|
|
else
|
|
GenNative(m_bcs, relative, lab2, nil, 0);
|
|
if num > 0 then begin
|
|
GenLab(lab1);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
GenLab(lab2);
|
|
end; {else if}
|
|
end {if}
|
|
else {if optype in [cgUByte,cgUWord] then} begin
|
|
GenNative(m_cmp_imm, immediate, num, nil, 0);
|
|
if op^.opcode = pc_grt then begin
|
|
lab2 := GenLabel;
|
|
GenNative(m_beq, relative, lab2, nil, 0);
|
|
end; {if}
|
|
GenNative(m_bcs, relative, lab1, nil, 0);
|
|
if op^.opcode = pc_grt then
|
|
GenLab(lab2);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
end {if rOpcode = pc_fjp}
|
|
else if rOpcode = pc_tjp then begin
|
|
if op^.optype in [cgByte,cgWord] then begin
|
|
if NeedsCondition(op^.left^.opcode) then
|
|
GenImplied(m_tax);
|
|
if (num >= 0) and (num < 4) then begin
|
|
lab2 := GenLabel;
|
|
if op^.opcode = pc_geq then begin
|
|
GenNative(m_bmi, relative, lab1, nil, 0);
|
|
if num > 0 then begin
|
|
for i := 1 to num do
|
|
GenImplied(m_dea);
|
|
GenNative(m_bmi, relative, lab2, nil, 0);
|
|
end; {if}
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
end {if}
|
|
else {if op^.opcode = pc_grt then} begin
|
|
if num > 0 then begin
|
|
GenNative(m_bmi, relative, lab1, nil, 0);
|
|
for i := 0 to num do
|
|
GenImplied(m_dea);
|
|
GenNative(m_bmi, relative, lab2, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_bmi, relative, lab2, nil, 0);
|
|
end; {else}
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
end; {else}
|
|
GenLab(lab2);
|
|
GenLab(lab1);
|
|
end {if (num >= 0) and (num < 4)}
|
|
else begin
|
|
lab2 := GenLabel;
|
|
if num > 0 then
|
|
GenNative(m_bmi, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(m_bpl, relative, lab1, nil, 0);
|
|
GenNative(m_cmp_imm, immediate, num, nil, 0);
|
|
if op^.opcode = pc_grt then begin
|
|
lab3 := GenLabel;
|
|
GenNative(m_beq, relative, lab3, nil, 0);
|
|
end; {if}
|
|
GenNative(m_bcc, relative, lab2, nil, 0);
|
|
if num > 0 then begin
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab2);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else begin
|
|
GenLab(lab1);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab2);
|
|
end; {else}
|
|
if op^.opcode = pc_grt then
|
|
GenLab(lab3);
|
|
end; {else}
|
|
end {if}
|
|
else {if optype in [cgUByte,cgUWord] then} begin
|
|
GenNative(m_cmp_imm, immediate, num, nil, 0);
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
if op^.opcode = pc_grt then begin
|
|
lab2 := GenLabel;
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
end; {if}
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
if op^.opcode = pc_grt then
|
|
GenLab(lab2);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
end {if rOpcode = pc_tjp}
|
|
else if op^.optype in [cgByte,cgWord] then begin
|
|
lab2 := GenLabel;
|
|
GenNative(m_ldx_imm, immediate, 1, nil, 0);
|
|
GenImplied(m_sec);
|
|
GenNative(m_sbc_imm, immediate, num, nil, 0);
|
|
if op^.opcode = pc_grt then begin
|
|
lab3 := GenLabel;
|
|
GenNative(m_beq, relative, lab3, nil, 0);
|
|
end; {if}
|
|
GenNative(m_bvs, relative, lab1, nil, 0);
|
|
GenNative(m_eor_imm, immediate, $8000, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_bmi, relative, lab2, nil, 0);
|
|
if op^.opcode = pc_grt then
|
|
GenLab(lab3);
|
|
GenImplied(m_dex);
|
|
GenLab(lab2);
|
|
GenImplied(m_txa);
|
|
end {else if}
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, 0, nil, 0);
|
|
GenNative(m_cmp_imm, immediate, num, nil, 0);
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
if op^.opcode = pc_grt then
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenImplied(m_inx);
|
|
GenLab(lab1);
|
|
GenImplied(m_txa);
|
|
end; {else if}
|
|
end {if (op^.optype in [cgByte,cgUByte,cgWord,cgUWord]) and
|
|
(op^.right^.opcode = pc_ldc)}
|
|
|
|
{This section of code handles the cases where the above short }
|
|
{cuts cannot be used. }
|
|
else
|
|
case op^.optype of
|
|
|
|
cgByte,cgUByte,cgWord,cgUWord: begin
|
|
if Complex(op^.right) then begin
|
|
GenTree(op^.right);
|
|
if Complex(op^.left) then begin
|
|
GenImplied(m_pha);
|
|
GenTree(op^.left);
|
|
GenImplied(m_ply);
|
|
GenNative(m_sty_dir, direct, dworkLoc, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_sta_dir, direct, dworkLoc, nil, 0);
|
|
GenTree(op^.left);
|
|
end; {else}
|
|
if not (rOpcode in [pc_fjp,pc_tjp]) then
|
|
GenNative(m_ldx_imm, immediate, 1, nil, 0);
|
|
if op^.optype in [cgByte,cgWord] then begin
|
|
GenImplied(m_sec);
|
|
GenNative(m_sbc_dir, direct, dworkLoc, nil, 0);
|
|
end {if}
|
|
else
|
|
GenNative(m_cmp_dir, direct, dworkLoc, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenTree(op^.left);
|
|
if not (rOpcode in [pc_fjp,pc_tjp]) then
|
|
GenNative(m_ldx_imm, immediate, 1, nil, 0);
|
|
if op^.optype in [cgByte,cgWord] then begin
|
|
GenImplied(m_sec);
|
|
OperA(m_sbc_imm, op^.right);
|
|
if op^.right^.opcode in [pc_lld,pc_lli,pc_gli,pc_gld] then
|
|
GenImplied(m_tay);
|
|
end {if}
|
|
else
|
|
OperA(m_cmp_imm, op^.right);
|
|
end; {else}
|
|
if rOpcode = pc_fjp then begin
|
|
lab2 := GenLabel;
|
|
if op^.opcode = pc_grt then begin
|
|
lab3 := GenLabel;
|
|
GenNative(m_beq, relative, lab3, nil, 0);
|
|
end; {if}
|
|
if op^.optype in [cgByte,cgWord] then begin
|
|
lab1 := GenLabel;
|
|
GenNative(m_bvs, relative, lab1, nil, 0);
|
|
GenNative(m_eor_imm, immediate, $8000, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_bmi, relative, lab2, nil, 0);
|
|
end {if}
|
|
else
|
|
GenNative(m_bcs, relative, lab2, nil, 0);
|
|
if op^.opcode = pc_grt then
|
|
GenLab(lab3);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab2);
|
|
end {if}
|
|
else if rOpcode = pc_tjp then begin
|
|
lab2 := GenLabel;
|
|
if op^.opcode = pc_grt then begin
|
|
lab3 := GenLabel;
|
|
GenNative(m_beq, relative, lab3, nil, 0);
|
|
end; {if}
|
|
if op^.optype in [cgByte,cgWord] then begin
|
|
lab1 := GenLabel;
|
|
GenNative(m_bvs, relative, lab1, nil, 0);
|
|
GenNative(m_eor_imm, immediate, $8000, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_bpl, relative, lab2, nil, 0);
|
|
end {if}
|
|
else
|
|
GenNative(m_bcc, relative, lab2, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
if op^.opcode = pc_grt then
|
|
GenLab(lab3);
|
|
GenLab(lab2);
|
|
end {else if}
|
|
else begin
|
|
lab2 := GenLabel;
|
|
if op^.opcode = pc_grt then begin
|
|
lab3 := GenLabel;
|
|
GenNative(m_beq, relative, lab3, nil, 0);
|
|
end; {if}
|
|
if op^.optype in [cgByte,cgWord] then begin
|
|
lab1 := GenLabel;
|
|
GenNative(m_bvs, relative, lab1, nil, 0);
|
|
GenNative(m_eor_imm, immediate, $8000, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_bmi, relative, lab2, nil, 0);
|
|
end {if}
|
|
else
|
|
GenNative(m_bcs, relative, lab2, nil, 0);
|
|
if op^.opcode = pc_grt then
|
|
GenLab(lab3);
|
|
GenImplied(m_dex);
|
|
GenLab(lab2);
|
|
GenImplied(m_txa);
|
|
end; {else}
|
|
end; {case optype of cgByte,cgUByte,cgWord,cgUWord}
|
|
|
|
cgULong: begin
|
|
gLong.preference := onStack;
|
|
GenTree(op^.right);
|
|
gLong.preference := A_X;
|
|
GenTree(op^.left);
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_ply);
|
|
GenImplied(m_pla);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_tay);
|
|
GenImplied(m_txa);
|
|
end; {else}
|
|
lab1 := GenLabel;
|
|
GenNative(m_ldx_imm, immediate, 1, nil, 0);
|
|
GenNative(m_cmp_s, direct, 3, nil, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
GenImplied(m_tya);
|
|
GenNative(m_cmp_s, direct, 1, nil, 0);
|
|
GenLab(lab1);
|
|
lab2 := GenLabel;
|
|
if op^.opcode = pc_grt then begin
|
|
lab3 := GenLabel;
|
|
GenNative(m_beq, relative, lab3, nil, 0);
|
|
end; {if}
|
|
GenNative(m_bcs, relative, lab2, nil, 0);
|
|
if op^.opcode = pc_grt then
|
|
GenLab(lab3);
|
|
GenImplied(m_dex);
|
|
GenLab(lab2);
|
|
GenImplied(m_pla);
|
|
GenImplied(m_pla);
|
|
GenImplied(m_txa);
|
|
if rOpcode = pc_fjp then begin
|
|
lab4 := GenLabel;
|
|
GenNative(m_bne, relative, lab4, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab4);
|
|
end {if}
|
|
else if rOpcode = pc_tjp then begin
|
|
lab4 := GenLabel;
|
|
GenNative(m_beq, relative, lab4, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab4);
|
|
end; {else if}
|
|
end;
|
|
|
|
cgReal,cgDouble,cgComp,cgExtended: begin
|
|
GenTree(op^.left);
|
|
GenTree(op^.right);
|
|
num := 31;
|
|
if op^.opcode = pc_geq then
|
|
GenCall(32)
|
|
else
|
|
GenCall(31);
|
|
if (rOpcode = pc_fjp) or (rOpcode = pc_tjp) then begin
|
|
lab1 := GenLabel;
|
|
if rOpcode = pc_fjp then
|
|
GenNative(m_bne, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_brl,longrelative,lb,nil,0);
|
|
GenLab(lab1);
|
|
end; {if}
|
|
end; {case optype of cgReal..cgExtended}
|
|
|
|
cgLong: begin
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
if op^.opcode = pc_geq then begin
|
|
gLong.preference := A_X;
|
|
GenTree(op^.right);
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_plx);
|
|
end; {if}
|
|
num := 30;
|
|
end {if}
|
|
else begin
|
|
gLong.preference := onStack;
|
|
GenTree(op^.right);
|
|
num := 29;
|
|
end; {else}
|
|
GenCall(num);
|
|
if (rOpcode = pc_fjp) or (rOpcode = pc_tjp) then begin
|
|
lab1 := GenLabel;
|
|
if rOpcode = pc_fjp then
|
|
GenNative(m_bne, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end; {if}
|
|
end; {case optype of cgLong}
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {GenCmp}
|
|
|
|
|
|
procedure GenCnv (op: icptr);
|
|
|
|
{ generate a pc_cnv instruction }
|
|
|
|
const {note: these constants list all legal }
|
|
{ conversions; others are ignored}
|
|
cReal = $06;
|
|
cDouble = $07;
|
|
cComp = $08;
|
|
cExtended = $09;
|
|
cVoid = $0B;
|
|
|
|
byteToWord = $02;
|
|
byteToUword = $03;
|
|
byteToLong = $04;
|
|
byteToUlong = $05;
|
|
byteToReal = $06;
|
|
byteToDouble = $07;
|
|
ubyteToLong = $14;
|
|
ubyteToUlong = $15;
|
|
ubyteToReal = $16;
|
|
ubyteToDouble = $17;
|
|
wordToByte = $20;
|
|
wordToUByte = $21;
|
|
wordToLong = $24;
|
|
wordToUlong = $25;
|
|
wordToReal = $26;
|
|
wordToDouble = $27;
|
|
uwordToByte = $30;
|
|
uwordToUByte = $31;
|
|
uwordToLong = $34;
|
|
uwordToUlong = $35;
|
|
uwordToReal = $36;
|
|
uwordToDouble = $37;
|
|
longTobyte = $40;
|
|
longToUbyte = $41;
|
|
longToWord = $42;
|
|
longToUword = $43;
|
|
longToReal = $46;
|
|
longToDouble = $47;
|
|
longToVoid = $4B;
|
|
ulongTobyte = $50;
|
|
ulongToUbyte = $51;
|
|
ulongToWord = $52;
|
|
ulongToUword = $53;
|
|
ulongToReal = $56;
|
|
ulongToDouble = $57;
|
|
ulongToVoid = $5B;
|
|
realTobyte = $60;
|
|
realToUbyte = $61;
|
|
realToWord = $62;
|
|
realToUword = $63;
|
|
realToLong = $64;
|
|
realToUlong = $65;
|
|
realToVoid = $6B;
|
|
doubleTobyte = $70;
|
|
doubleToUbyte = $71;
|
|
doubleToWord = $72;
|
|
doubleToUword = $73;
|
|
doubleToLong = $74;
|
|
doubleToUlong = $75;
|
|
|
|
var
|
|
fromReal: boolean; {are we converting from a real?}
|
|
lab1: integer; {used for branches}
|
|
lLong: longType; {used to reserve gLong}
|
|
|
|
begin {GenCnv}
|
|
lLong := gLong;
|
|
gLong.preference := onStack+A_X+constant;
|
|
gLong.where := onStack;
|
|
if ((op^.q & $00F0) >> 4) in [cDouble,cExtended,cComp] then begin
|
|
op^.q := (op^.q & $000F) | (cReal * 16);
|
|
fromReal := true;
|
|
end {if}
|
|
else
|
|
fromReal := false;
|
|
if (op^.q & $000F) in [cDouble,cExtended,cComp] then
|
|
op^.q := (op^.q & $00F0) | cReal;
|
|
GenTree(op^.left);
|
|
if op^.q in [wordToLong,wordToUlong] then begin
|
|
lab1 := GenLabel;
|
|
GenNative(m_ldx_imm, immediate, 0, nil, 0);
|
|
GenImplied(m_tay);
|
|
GenNative(m_bpl, relative, lab1, nil, 0);
|
|
GenImplied(m_dex);
|
|
GenLab(lab1);
|
|
if (lLong.preference & A_X) <> 0 then
|
|
gLong.where := A_X
|
|
else begin
|
|
gLong.where := onStack;
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
end {if}
|
|
else if op^.q in [byteToLong,byteToUlong] then begin
|
|
lab1 := GenLabel;
|
|
GenNative(m_ldx_imm, immediate, 0, nil, 0);
|
|
GenNative(m_bit_imm, immediate, $0080, nil, 0);
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenImplied(m_dex);
|
|
GenNative(m_ora_imm, immediate, $FF00, nil, 0);
|
|
GenLab(lab1);
|
|
if (lLong.preference & A_X) <> 0 then
|
|
gLong.where := A_X
|
|
else begin
|
|
gLong.where := onStack;
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
end {if}
|
|
else if op^.q in [byteToWord,byteToUword] then begin
|
|
lab1 := GenLabel;
|
|
GenNative(m_bit_imm, immediate, $0080, nil, 0);
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_ora_imm, immediate, $FF00, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else if op^.q in [ubyteToLong,ubyteToUlong,uwordToLong,uwordToUlong] then
|
|
begin
|
|
if (lLong.preference & A_X) <> 0 then begin
|
|
gLong.where := A_X;
|
|
GenNative(m_ldx_imm, immediate, 0, nil, 0);
|
|
end {if}
|
|
else begin
|
|
gLong.where := onStack;
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
end {else if}
|
|
else if op^.q in [wordToByte,wordToUbyte,uwordToByte,uwordToUbyte] then
|
|
GenNative(m_and_imm, immediate, $00FF, nil, 0)
|
|
else if op^.q in [byteToReal,uByteToReal,wordToReal] then
|
|
GenCall(11)
|
|
else if op^.q = uwordToReal then begin
|
|
GenNative(m_ldx_imm, immediate, 0, nil, 0);
|
|
GenCall(12);
|
|
end {else if}
|
|
else if op^.q in [longToByte,longToUbyte,ulongToByte,ulongToUbyte] then begin
|
|
if gLong.where = A_X then
|
|
GenNative(m_and_imm, immediate, $00FF, nil, 0)
|
|
else if gLong.where = constant then
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).lsw & $00FF, nil, 0)
|
|
else {if gLong.where = onStack then} begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_plx);
|
|
GenNative(m_and_imm, immediate, $00FF, nil, 0);
|
|
end; {else if}
|
|
end {else if}
|
|
else if op^.q in [longToWord,longToUword,ulongToWord,ulongToUword] then begin
|
|
{Note: if the result is in A_X, no further action is needed}
|
|
if gLong.where = constant then
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).lsw, nil, 0)
|
|
else if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_plx);
|
|
end; {else if}
|
|
end {else if}
|
|
else if op^.q in [longToReal,uLongToReal] then begin
|
|
if gLong.where = constant then begin
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).lsw, nil, 0);
|
|
GenNative(m_ldx_imm, immediate, long(gLong.lval).msw, nil, 0);
|
|
end {if}
|
|
else if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_plx);
|
|
end; {else if}
|
|
if op^.q = longToReal then
|
|
GenCall(12)
|
|
else
|
|
GenCall(13);
|
|
end {else}
|
|
else if op^.q in [realToByte,realToUbyte,realToWord] then begin
|
|
GenCall(14);
|
|
if (op^.q & $00FF) in [0,1] then
|
|
GenNative(m_and_imm, immediate, $00FF, nil, 0);
|
|
end {else if}
|
|
else if op^.q = realToUword then
|
|
GenCall(15)
|
|
else if op^.q in [realToLong,realToUlong] then begin
|
|
if op^.q & $00FF = 5 then
|
|
GenCall(17)
|
|
else
|
|
GenCall(16);
|
|
if (lLong.preference & A_X) <> 0 then
|
|
gLong.where := A_X
|
|
else begin
|
|
gLong.where := onStack;
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
end {else if}
|
|
else if op^.q = realToVoid then begin
|
|
GenImplied(m_tsc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, 10, nil, 0);
|
|
GenImplied(m_tcs);
|
|
end {else if}
|
|
else if op^.q in [longToVoid,ulongToVoid] then begin
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_plx);
|
|
gLong.where := A_X;
|
|
end; {if}
|
|
end {else if}
|
|
else if (op^.q & $000F) = cVoid then
|
|
{do nothing}
|
|
else if lLong.preference & gLong.where = 0 then begin
|
|
if gLong.where = constant then begin
|
|
GenNative(m_pea, immediate, long(gLong.lval).msw, nil, 0);
|
|
GenNative(m_pea, immediate, long(gLong.lval).lsw, nil, 0);
|
|
end {if}
|
|
else if gLong.where = A_X then begin
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end; {else if}
|
|
gLong.where := onStack;
|
|
end; {else if}
|
|
end; {GenCnv}
|
|
|
|
|
|
procedure GenEquNeq (op: icptr; opcode: pcodes; lb: integer);
|
|
|
|
{ generate a pc_equ or pc_neq instruction }
|
|
{ }
|
|
{ parameters: }
|
|
{ op - node to generate the compare for }
|
|
{ opcode - Opcode that will use the result of the compare. }
|
|
{ If the result is used by a tjp or fjp, this procedure }
|
|
{ generates special code and does the branch internally. }
|
|
{ lb - For fjp, tjp, this is the label to branch to if }
|
|
{ the condition is satisfied. }
|
|
|
|
var
|
|
nd: icptr; {work node}
|
|
num: integer; {constant to compare to}
|
|
lab1,lab2: integer; {label numbers}
|
|
bne: integer; {instruction for a pc_equ bne branch}
|
|
beq: integer; {instruction for a pc_equ beq branch}
|
|
lLong: longType; {local long value information}
|
|
leftOp,rightOp: pcodes; {opcode codes to left, right}
|
|
|
|
|
|
procedure DoOr (op: icptr);
|
|
|
|
{ or the two halves of a four byte value }
|
|
{ }
|
|
{ parameters: }
|
|
{ operand to or }
|
|
|
|
var
|
|
disp: integer; {disp of value on stack frame}
|
|
|
|
begin {DoOr}
|
|
with op^ do begin
|
|
if opcode = pc_ldo then begin
|
|
if smallMemoryModel then begin
|
|
GenNative(m_lda_abs, absolute, q, lab, 0);
|
|
GenNative(m_ora_abs, absolute, q+2, lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_long, longabsolute, q, lab, 0);
|
|
GenNative(m_ora_long, longabsolute, q+2, lab, 0);
|
|
end; {else}
|
|
end {if}
|
|
else begin
|
|
disp := LabelToDisp(r) + q;
|
|
if disp < 254 then begin
|
|
GenNative(m_lda_dir, direct, disp, nil, 0);
|
|
GenNative(m_ora_dir, direct, disp+2, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
GenNative(m_lda_dirX, direct, 0, nil, 0);
|
|
GenNative(m_ora_dirX, direct, 2, nil, 0);
|
|
end; {else}
|
|
end; {else}
|
|
end; {with}
|
|
end; {DoOr}
|
|
|
|
|
|
procedure DoCmp (op: icPtr);
|
|
|
|
{ compare a long value in A_X to a local or global scalar }
|
|
{ }
|
|
{ parameters: }
|
|
{ op - value to compare to }
|
|
|
|
var
|
|
disp: integer; {disp of value on stack frame}
|
|
lab1: integer; {label numbers}
|
|
|
|
begin {DoCmp}
|
|
lab1 := GenLabel;
|
|
with op^ do begin
|
|
if opcode = pc_ldo then begin
|
|
GenNative(m_cmp_abs, absolute, q, lab, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
GenNative(m_cpx_abs, absolute, q+2, lab, 0);
|
|
end {if}
|
|
else begin
|
|
disp := LabelToDisp(r) + q;
|
|
if disp < 254 then begin
|
|
GenNative(m_cmp_dir, direct, disp, nil, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
GenNative(m_cpx_dir, direct, disp+2, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_txy);
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
GenNative(m_cmp_dirX, direct, 0, nil, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
GenImplied(m_tya);
|
|
GenNative(m_cmp_dirX, direct, 2, nil, 0);
|
|
end; {else}
|
|
end; {else}
|
|
GenLab(lab1);
|
|
end; {with}
|
|
end; {DoCmp}
|
|
|
|
|
|
begin {GenEquNeq}
|
|
if op^.opcode = pc_equ then begin
|
|
bne := m_bne;
|
|
beq := m_beq;
|
|
end {if}
|
|
else begin
|
|
bne := m_beq;
|
|
beq := m_bne;
|
|
end; {else}
|
|
if op^.left^.opcode in [pc_lod,pc_ldo] then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
if op^.left^.opcode = pc_ldc then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
leftOp := op^.left^.opcode; {set op codes for fast access}
|
|
rightOp := op^.right^.opcode;
|
|
if (op^.optype in [cgByte,cgUByte,cgWord,cgUWord]) and
|
|
(rightOp = pc_ldc) then begin
|
|
GenTree(op^.left);
|
|
num := op^.right^.q;
|
|
lab1 := GenLabel;
|
|
if opcode in [pc_fjp,pc_tjp] then begin
|
|
if num <> 0 then
|
|
GenNative(m_cmp_imm, immediate, num, nil, 0)
|
|
else if NeedsCondition(leftOp) then
|
|
GenImplied(m_tay);
|
|
if opcode = pc_fjp then
|
|
GenNative(beq, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(bne, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, 0, nil, 0);
|
|
GenNative(m_cmp_imm, immediate, num, nil, 0);
|
|
GenNative(bne, relative, lab1, nil, 0);
|
|
GenImplied(m_inx);
|
|
GenLab(lab1);
|
|
GenImplied(m_txa);
|
|
end; {else}
|
|
end {if}
|
|
else if (op^.optype in [cgLong,cgULong]) and (leftOp in [pc_ldo,pc_lod])
|
|
and (rightOp = pc_ldc) and (op^.right^.lval = 0) then begin
|
|
if opcode in [pc_fjp,pc_tjp] then begin
|
|
DoOr(op^.left);
|
|
lab1 := GenLabel;
|
|
if opcode = pc_fjp then
|
|
GenNative(beq, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(bne, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else if op^.opcode = pc_equ then begin
|
|
lab1 := GenLabel;
|
|
lab2 := GenLabel;
|
|
DoOr(op^.left);
|
|
GenNative(bne, relative, lab1, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 1, nil, 0);
|
|
GenNative(m_bra, relative, lab2, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_lda_imm, immediate, 0, nil, 0);
|
|
GenLab(lab2);
|
|
end {else if}
|
|
else {if op^.opcode = pc_neq then} begin
|
|
lab1 := GenLabel;
|
|
DoOr(op^.left);
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 1, nil, 0);
|
|
GenLab(lab1);
|
|
end; {else if}
|
|
end {else if}
|
|
else if (op^.optype in [cgLong,cgULong]) and (rightOp in [pc_ldo,pc_lod]) then begin
|
|
gLong.preference := A_X;
|
|
GenTree(op^.left);
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_plx);
|
|
end; {if}
|
|
if opcode in [pc_fjp,pc_tjp] then begin
|
|
DoCmp(op^.right);
|
|
lab1 := GenLabel;
|
|
if opcode = pc_fjp then
|
|
GenNative(beq, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(bne, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else begin
|
|
lab1 := GenLabel;
|
|
lab2 := GenLabel;
|
|
DoCmp(op^.right);
|
|
GenNative(bne, relative, lab1, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 1, nil, 0);
|
|
GenNative(m_bra, relative, lab2, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_lda_imm, immediate, 0, nil, 0);
|
|
GenLab(lab2);
|
|
end; {else}
|
|
end {else if}
|
|
else
|
|
case op^.optype of
|
|
|
|
cgByte,cgUByte,cgWord,cgUWord: begin
|
|
if not Complex(op^.left) then
|
|
if Complex(op^.right) then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
GenTree(op^.left);
|
|
if Complex(op^.right) or (not (opcode in [pc_fjp,pc_tjp])) then begin
|
|
GenImplied(m_pha);
|
|
GenTree(op^.right);
|
|
GenImplied(m_sec);
|
|
GenNative(m_sbc_s, direct, 1, nil, 0);
|
|
GenImplied(m_plx);
|
|
GenImplied(m_tax);
|
|
if opcode in [pc_fjp,pc_tjp] then begin
|
|
lab1 := GenLabel;
|
|
if opcode = pc_fjp then
|
|
GenNative(beq, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(bne, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else begin
|
|
lab1 := GenLabel;
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 1, nil, 0);
|
|
GenLab(lab1);
|
|
if op^.opcode = pc_equ then
|
|
GenNative(m_eor_imm, immediate, 1, nil, 0);
|
|
end; {else}
|
|
end {if}
|
|
else begin
|
|
OperA(m_cmp_imm, op^.right);
|
|
lab1 := GenLabel;
|
|
if opcode = pc_fjp then
|
|
GenNative(beq, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(bne, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
end; {case optype of cgByte,cgUByte,cgWord,cgUWord}
|
|
|
|
cgLong,cgULong: begin
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
lLong := gLong;
|
|
gLong.preference := A_X;
|
|
GenTree(op^.right);
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_plx);
|
|
end; {if}
|
|
GenNative(m_ldy_imm, immediate, 1, nil, 0);
|
|
GenNative(m_cmp_s, direct, 1, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenImplied(m_dey);
|
|
GenLab(lab1);
|
|
GenImplied(m_txa);
|
|
GenNative(m_cmp_s, direct, 3, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_ldy_imm, immediate, 0, nil, 0);
|
|
GenLab(lab1);
|
|
GenImplied(m_pla);
|
|
GenImplied(m_pla);
|
|
GenImplied(m_tya);
|
|
if opcode in [pc_fjp,pc_tjp] then begin
|
|
lab1 := GenLabel;
|
|
if opcode = pc_fjp then
|
|
GenNative(bne, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(beq, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else if op^.opcode = pc_neq then
|
|
GenNative(m_eor_imm, immediate, 1, nil, 0);
|
|
end; {case optype of cgLong,cgULong}
|
|
|
|
cgReal,cgDouble,cgComp,cgExtended: begin
|
|
GenTree(op^.left);
|
|
GenTree(op^.right);
|
|
GenCall(36);
|
|
if opcode in [pc_fjp,pc_tjp] then begin
|
|
lab1 := GenLabel;
|
|
if opcode = pc_fjp then
|
|
GenNative(bne, relative, lab1, nil, 0)
|
|
else
|
|
GenNative(beq, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, lb, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else if op^.opcode = pc_neq then
|
|
GenNative(m_eor_imm, immediate, 1, nil, 0);
|
|
end; {case optype of cgReal..cgExtended,cgSet,cgString}
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {GenEquNeq}
|
|
|
|
|
|
procedure GenGilGliGdlGld (op: icptr);
|
|
|
|
{ Generate code for a pc_gil, pc_gli, pc_gdl or pc_gld }
|
|
|
|
var
|
|
lab1: integer; {branch point}
|
|
lab: stringPtr; {op^.lab}
|
|
opcode: pcodes; {op^.opcode}
|
|
q: integer; {op^.q}
|
|
|
|
|
|
procedure DoGIncDec (opcode: pcodes; lab: stringPtr; p, q: integer);
|
|
|
|
{ Do a decrement or increment on a global four byte value }
|
|
{ }
|
|
{ parameters }
|
|
{ opcode - operation code }
|
|
{ lab - label }
|
|
{ q - disp to value }
|
|
{ p - number to ind/dec by }
|
|
|
|
var
|
|
lab1: integer; {branch point}
|
|
|
|
begin {DoGIncDec}
|
|
if smallMemoryModel then begin
|
|
if opcode in [pc_gil,pc_gli] then begin
|
|
lab1 := GenLabel;
|
|
if p = 1 then begin
|
|
GenNative(m_inc_abs, absolute, q, lab, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_clc);
|
|
GenNative(m_lda_abs, absolute, q, lab, 0);
|
|
GenNative(m_adc_imm, immediate, p, nil, 0);
|
|
GenNative(m_sta_abs, absolute, q, lab, 0);
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
end; {else}
|
|
GenNative(m_inc_abs, absolute, q+2, lab, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else {if opcode in [pc_gdl,pc_gld] then} begin
|
|
lab1 := GenLabel;
|
|
if p = 1 then begin
|
|
GenNative(m_lda_abs, absolute, q, lab, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
GenNative(m_dec_abs, absolute, q+2, lab, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_dec_abs, absolute, q, lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_sec);
|
|
GenNative(m_lda_abs, absolute, q, lab, 0);
|
|
GenNative(m_sbc_imm, immediate, p, nil, 0);
|
|
GenNative(m_sta_abs, absolute, q, lab, 0);
|
|
GenNative(m_bcs, relative, lab1, nil, 0);
|
|
GenNative(m_dec_abs, absolute, q+2, lab, 0);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
end {else}
|
|
end {of smallMemoryModel}
|
|
else begin
|
|
if opcode in [pc_gil,pc_gli] then begin
|
|
lab1 := GenLabel;
|
|
GenImplied(m_clc);
|
|
GenNative(m_lda_long, longabsolute, q, lab, 0);
|
|
GenNative(m_adc_imm, immediate, p, nil, 0);
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
GenNative(m_lda_long, longabsolute, q+2, lab, 0);
|
|
GenImplied(m_ina);
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else {if opcode in [pc_gdl,pc_gld] then} begin
|
|
lab1 := GenLabel;
|
|
GenImplied(m_sec);
|
|
GenNative(m_lda_long, longabsolute, q, lab, 0);
|
|
GenNative(m_sbc_imm, immediate, p, nil, 0);
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
GenNative(m_bcs, relative, lab1, nil, 0);
|
|
GenNative(m_lda_long, longabsolute, q+2, lab, 0);
|
|
GenImplied(m_dea);
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
GenLab(lab1);
|
|
end; {else if}
|
|
end; {else}
|
|
end; {DoGIncDec}
|
|
|
|
|
|
begin {GenGilGliGdlGld}
|
|
opcode := op^.opcode;
|
|
q := op^.q;
|
|
lab := op^.lab;
|
|
case op^.optype of
|
|
cgWord, cgUWord: begin
|
|
if opcode = pc_gil then
|
|
GenNative(m_inc_abs, absolute, q, lab, 0)
|
|
else if opcode = pc_gdl then
|
|
GenNative(m_dec_abs, absolute, q, lab, 0);
|
|
if not skipLoad then
|
|
GenNative(m_lda_abs, absolute, q, lab, 0);
|
|
if opcode = pc_gli then
|
|
GenNative(m_inc_abs, absolute, q, lab, 0)
|
|
else if opcode = pc_gld then
|
|
GenNative(m_dec_abs, absolute, q, lab, 0);
|
|
end;
|
|
|
|
cgByte, cgUByte: begin
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if opcode = pc_gil then
|
|
GenNative(m_inc_abs, absolute, q, lab, 0)
|
|
else if opcode = pc_gdl then
|
|
GenNative(m_dec_abs, absolute, q, lab, 0);
|
|
if not skipLoad then
|
|
GenNative(m_lda_abs, absolute, q, lab, 0);
|
|
if opcode = pc_gli then
|
|
GenNative(m_inc_abs, absolute, q, lab, 0)
|
|
else if opcode = pc_gld then
|
|
GenNative(m_dec_abs, absolute, q, lab, 0);
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
if not skipLoad then begin
|
|
GenNative(m_and_imm, immediate, 255, nil, 0);
|
|
if op^.optype = cgByte then begin
|
|
GenNative(m_bit_imm, immediate, $0080, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_ora_imm, immediate, $FF00, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_cmp_imm, immediate, $0000, nil, 0);
|
|
end; {if}
|
|
end; {if}
|
|
end;
|
|
|
|
cgLong, cgULong: begin
|
|
if (A_X & gLong.preference) <> 0 then
|
|
gLong.where := A_X
|
|
else
|
|
gLong.where := onStack;
|
|
if opcode in [pc_gil,pc_gdl] then
|
|
DoGIncDec(opcode, lab, op^.r, q);
|
|
if not skipLoad then
|
|
if smallMemoryModel then begin
|
|
GenNative(m_ldx_abs, absolute, q+2, lab, 0);
|
|
GenNative(m_lda_abs, absolute, q, lab, 0);
|
|
if (opcode in [pc_gli,pc_gld]) and (op^.r <> 1) then
|
|
gLong.where := onStack;
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end; {if}
|
|
end {if}
|
|
else begin
|
|
if opcode in [pc_gli,pc_gld] then
|
|
gLong.where := onStack;
|
|
GenNative(m_lda_long, longabsolute, q+2, lab, 0);
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pha)
|
|
else
|
|
GenImplied(m_tax);
|
|
GenNative(m_lda_long, longabsolute, q, lab, 0);
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
if opcode in [pc_gli,pc_gld] then
|
|
DoGIncDec(opcode, lab, op^.r, q);
|
|
end; {case cgLong,cgULong}
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {GenGilGliGdlGld}
|
|
|
|
|
|
procedure GenIilIliIdlIld (op: icptr);
|
|
|
|
{ Generate code for a pc_iil, pc_ili, pc_idl or pc_ild }
|
|
|
|
var
|
|
i: integer; {index variable}
|
|
lab1: integer; {label}
|
|
lSkipLoad: boolean; {copy of skipLoad}
|
|
opcode: pcodes; {op^.opcode}
|
|
short: boolean; {doing a one byte operand?}
|
|
|
|
begin {GenIilIliIdlIld}
|
|
opcode := op^.opcode;
|
|
case op^.optype of
|
|
cgByte,cgUByte,cgWord,cgUWord: begin
|
|
short := op^.optype in [cgByte,cgUByte];
|
|
lSkipLoad := skipLoad;
|
|
skipLoad := false;
|
|
GetPointer(op^.left);
|
|
skipLoad := lSkipLoad;
|
|
if gLong.where = inPointer then begin
|
|
if short then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if gLong.fixedDisp then
|
|
GenNative(m_lda_indl, direct, gLong.disp, nil, 0)
|
|
else
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0);
|
|
if opcode in [pc_ili,pc_iil] then
|
|
GenImplied(m_ina)
|
|
else
|
|
GenImplied(m_dea);
|
|
if gLong.fixedDisp then
|
|
GenNative(m_sta_indl, direct, gLong.disp, nil, 0)
|
|
else
|
|
GenNative(m_sta_indly, direct, gLong.disp, nil, 0);
|
|
if not skipLoad then
|
|
if opcode = pc_ili then
|
|
GenImplied(m_dea)
|
|
else if opcode = pc_ild then
|
|
GenImplied(m_ina);
|
|
if short then
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
end {if}
|
|
else if gLong.where = localAddress then begin
|
|
gLong.disp := gLong.disp+op^.q;
|
|
if gLong.fixedDisp then begin
|
|
if short then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if (gLong.disp < 256) and (gLong.disp >= 0) then begin
|
|
if (not skipLoad) and (opcode in [pc_ili,pc_ild]) then
|
|
GenNative(m_lda_dir, direct, gLong.disp, nil, 0);
|
|
if opcode in [pc_ili,pc_iil] then
|
|
GenNative(m_inc_dir, direct, gLong.disp, nil, 0)
|
|
else
|
|
GenNative(m_dec_dir, direct, gLong.disp, nil, 0);
|
|
if (not skipLoad) and (opcode in [pc_iil,pc_idl]) then
|
|
GenNative(m_lda_dir, direct, gLong.disp, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, gLong.disp, nil, 0);
|
|
if (not skipLoad) and (opcode in [pc_ili,pc_ild]) then
|
|
GenNative(m_lda_dirX, direct, gLong.disp, nil, 0);
|
|
if opcode in [pc_ili,pc_iil] then
|
|
GenNative(m_inc_dirX, direct, gLong.disp, nil, 0)
|
|
else
|
|
GenNative(m_dec_dirX, direct, gLong.disp, nil, 0);
|
|
if (not skipLoad) and (opcode in [pc_iil,pc_idl]) then
|
|
GenNative(m_lda_dirX, direct, gLong.disp, nil, 0);
|
|
end; {else}
|
|
if short then
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
end
|
|
else begin
|
|
if (gLong.disp > 255) or (gLong.disp < 0) then begin
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
GenImplied(m_tax);
|
|
gLong.disp := 0;
|
|
end; {if}
|
|
if short then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if (not skipLoad) and (opcode in [pc_ili,pc_ild]) then
|
|
GenNative(m_lda_dirX, direct, gLong.disp, nil, 0);
|
|
if opcode in [pc_ili,pc_iil] then
|
|
GenNative(m_inc_dirX, direct, gLong.disp, nil, 0)
|
|
else
|
|
GenNative(m_dec_dirX, direct, gLong.disp, nil, 0);
|
|
if (not skipLoad) and (opcode in [pc_iil,pc_idl]) then
|
|
GenNative(m_lda_dirX, direct, gLong.disp, nil, 0);
|
|
if short then
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
end; {else}
|
|
end {else if}
|
|
else {if gLong.where = globalLabel then} begin
|
|
gLong.disp := gLong.disp+op^.q;
|
|
if short then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if gLong.fixedDisp then
|
|
if smallMemoryModel then begin
|
|
if (not skipLoad) and (opcode in [pc_ili,pc_ild]) then
|
|
GenNative(m_lda_abs, absolute, gLong.disp, gLong.lab, 0);
|
|
if opcode in [pc_ili,pc_iil] then
|
|
GenNative(m_inc_abs, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_dec_abs, absolute, gLong.disp, gLong.lab, 0);
|
|
if (not skipLoad) and (opcode in [pc_iil,pc_idl]) then
|
|
GenNative(m_lda_abs, absolute, gLong.disp, gLong.lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_long, longAbs, gLong.disp, gLong.lab, 0);
|
|
if opcode in [pc_ili,pc_iil] then
|
|
GenImplied(m_ina)
|
|
else
|
|
GenImplied(m_dea);
|
|
GenNative(m_sta_long, longAbs, gLong.disp, gLong.lab, 0);
|
|
if not skipLoad then
|
|
if opcode = pc_ili then
|
|
GenImplied(m_dea)
|
|
else if opcode = pc_ild then
|
|
GenImplied(m_ina);
|
|
end {else}
|
|
else
|
|
if smallMemoryModel then begin
|
|
if (not skipLoad) and (opcode in [pc_ili,pc_ild]) then
|
|
GenNative(m_lda_absX, absolute, gLong.disp, gLong.lab, 0);
|
|
if opcode in [pc_ili,pc_iil] then
|
|
GenNative(m_inc_absX, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_dec_absX, absolute, gLong.disp, gLong.lab, 0);
|
|
if (not skipLoad) and (opcode in [pc_iil,pc_idl]) then
|
|
GenNative(m_lda_absX, absolute, gLong.disp, gLong.lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_longX, longAbs, gLong.disp, gLong.lab, 0);
|
|
if opcode in [pc_ili,pc_iil] then
|
|
GenImplied(m_ina)
|
|
else
|
|
GenImplied(m_dea);
|
|
GenNative(m_sta_longX, longAbs, gLong.disp, gLong.lab, 0);
|
|
if not skipLoad then
|
|
if opcode = pc_ili then
|
|
GenImplied(m_dea)
|
|
else if opcode = pc_ild then
|
|
GenImplied(m_ina);
|
|
end; {else}
|
|
if short then
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
end; {else}
|
|
if not skipLoad then
|
|
if short then
|
|
GenNative(m_and_imm, immediate, $00FF, nil, 0);
|
|
end; {case cgByte,cgUByte,cgWord,cgUWord}
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {GenIilIliIdlIld}
|
|
|
|
|
|
procedure GenIncDec (op, save: icptr);
|
|
|
|
{ generate code for pc_inc, pc_dec }
|
|
{ }
|
|
{ parameters: }
|
|
{ op - pc_inc or pc_dec operation }
|
|
{ save - save location (pc_str or pc_sro) or nil }
|
|
|
|
var
|
|
disp: integer; {disp in stack frame}
|
|
lab1: integer; {branch point}
|
|
opcode: pcodes; {temp storage for op code}
|
|
size: integer; {number to increment by}
|
|
clc,ina,adc: integer; {instructions to generate}
|
|
|
|
begin {GenIncDec}
|
|
{set up local variables}
|
|
opcode := op^.opcode;
|
|
size := op^.q;
|
|
|
|
if op^.optype in [cgByte,cgUByte,cgWord,cgUWord] then begin
|
|
GenTree(op^.left);
|
|
if opcode = pc_inc then begin
|
|
clc := m_clc;
|
|
ina := m_ina;
|
|
adc := m_adc_imm;
|
|
end {if}
|
|
else begin
|
|
clc := m_sec;
|
|
ina := m_dea;
|
|
adc := m_sbc_imm;
|
|
end; {else}
|
|
if size = 1 then
|
|
GenImplied(ina)
|
|
else if size = 2 then begin
|
|
GenImplied(ina);
|
|
GenImplied(ina);
|
|
end {else if}
|
|
else if size <> 0 then begin
|
|
GenImplied(clc);
|
|
GenNative(adc, immediate, size, nil, 0);
|
|
end; {else if}
|
|
end {if}
|
|
else if op^.optype in [cgLong,cgULong] then begin
|
|
if SameLoc(op^.left, save) then begin
|
|
lab1 := GenLabel;
|
|
if size = 1 then begin
|
|
if opcode = pc_inc then begin
|
|
DoOp(0, m_inc_abs, m_inc_dir, op^.left, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
DoOp(0, m_inc_abs, m_inc_dir, op^.left, 2);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else {if opcode = pc_dec then} begin
|
|
DoOp(m_lda_imm, m_lda_abs, m_lda_dir, op^.left, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
DoOp(0, m_dec_abs, m_dec_dir, op^.left, 2);
|
|
GenLab(lab1);
|
|
DoOp(0, m_dec_abs, m_dec_dir, op^.left, 0);
|
|
end; {else}
|
|
end {if}
|
|
else if opcode = pc_inc then begin
|
|
GenImplied(m_clc);
|
|
DoOp(m_lda_imm, m_lda_abs, m_lda_dir, op^.left, 0);
|
|
GenNative(m_adc_imm, immediate, size, nil, 0);
|
|
DoOp(0, m_sta_abs, m_sta_dir, op^.left, 0);
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
DoOp(0, m_inc_abs, m_inc_dir, op^.left, 2);
|
|
GenLab(lab1);
|
|
end {else if}
|
|
else begin
|
|
GenImplied(m_sec);
|
|
DoOp(m_lda_imm, m_lda_abs, m_lda_dir, op^.left, 0);
|
|
GenNative(m_sbc_imm, immediate, size, nil, 0);
|
|
DoOp(0, m_sta_abs, m_sta_dir, op^.left, 0);
|
|
GenNative(m_bcs, relative, lab1, nil, 0);
|
|
DoOp(0, m_dec_abs, m_dec_dir, op^.left, 2);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
end {if}
|
|
else begin
|
|
if save <> nil then
|
|
gLong.preference := A_X
|
|
else
|
|
gLong.preference := gLong.preference & (A_X | inpointer);
|
|
if opcode = pc_dec then
|
|
gLong.preference := gLong.preference & A_X;
|
|
GenTree(op^.left);
|
|
if opcode = pc_inc then
|
|
IncAddr(size)
|
|
else begin
|
|
lab1 := GenLabel;
|
|
if gLong.where = A_X then begin
|
|
GenImplied(m_sec);
|
|
GenNative(m_sbc_imm, immediate, size, nil, 0);
|
|
GenNative(m_bcs, relative, lab1, nil, 0);
|
|
GenImplied(m_dex);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_sec);
|
|
GenNative(m_lda_s, direct, 1, nil, 0);
|
|
GenNative(m_sbc_imm, immediate, size, nil, 0);
|
|
GenNative(m_sta_s, direct, 1, nil, 0);
|
|
GenNative(m_bcs, relative, lab1, nil, 0);
|
|
GenNative(m_lda_s, direct, 3, nil, 0);
|
|
GenImplied(m_dea);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
end; {else}
|
|
GenLab(lab1);
|
|
end; {else}
|
|
if save <> nil then
|
|
if save^.opcode = pc_str then begin
|
|
disp := LabelToDisp(save^.r) + save^.q;
|
|
if disp < 254 then begin
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
if gLong.where = onStack then
|
|
GenImplied(m_plx);
|
|
GenNative(m_stx_dir, direct, disp+2, nil, 0);
|
|
end {else if}
|
|
else begin
|
|
if gLong.where = A_X then
|
|
GenImplied(m_txy);
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pla)
|
|
else
|
|
GenImplied(m_tya);
|
|
GenNative(m_sta_dirX, direct, 2, nil, 0);
|
|
end; {else}
|
|
end {else if}
|
|
else {if save^.opcode = pc_sro then} begin
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pla);
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, save^.q, save^.lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, save^.q, save^.lab, 0);
|
|
if smallMemoryModel then begin
|
|
if gLong.where = onStack then
|
|
GenImplied(m_plx);
|
|
GenNative(m_stx_abs, absolute, save^.q+2, save^.lab, 0)
|
|
end {if}
|
|
else begin
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pla)
|
|
else
|
|
GenImplied(m_txa);
|
|
GenNative(m_sta_long, longabsolute, save^.q+2, save^.lab, 0);
|
|
end; {else}
|
|
end; {else}
|
|
end; {else}
|
|
end; {else if}
|
|
end; {GenIncDec}
|
|
|
|
|
|
procedure GenInd (op: icptr);
|
|
|
|
{ Generate code for a pc_ind }
|
|
|
|
var
|
|
lab1: integer; {label}
|
|
lLong: longType; {requested address type}
|
|
optype: baseTypeEnum; {op^.optype}
|
|
q: integer; {op^.q}
|
|
|
|
begin {GenInd}
|
|
optype := op^.optype;
|
|
q := op^.q;
|
|
case optype of
|
|
cgReal,cgDouble,cgComp,cgExtended: begin
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
if q <> 0 then
|
|
IncAddr(q);
|
|
if optype = cgReal then
|
|
GenCall(21)
|
|
else if optype = cgDouble then
|
|
GenCall(22)
|
|
else if optype = cgComp then
|
|
GenCall(70)
|
|
else if optype = cgExtended then
|
|
GenCall(71);
|
|
end; {case cgReal,cgDouble,cgComp,cgExtended}
|
|
|
|
cgLong,cgULong: begin
|
|
lLong := gLong;
|
|
GetPointer(op^.left);
|
|
if gLong.where = inPointer then begin
|
|
if q = 0 then begin
|
|
if gLong.fixedDisp then begin
|
|
GenNative(m_ldy_imm, immediate, 2, nil, 0);
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0);
|
|
if (A_X & lLong.preference) <> 0 then
|
|
GenImplied(m_tax)
|
|
else
|
|
GenImplied(m_pha);
|
|
GenNative(m_lda_indl, direct, gLong.disp, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_iny);
|
|
GenImplied(m_iny);
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0);
|
|
if (A_X & lLong.preference) <> 0 then
|
|
GenImplied(m_tax)
|
|
else
|
|
GenImplied(m_pha);
|
|
GenImplied(m_dey);
|
|
GenImplied(m_dey);
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0);
|
|
end; {else}
|
|
if (A_X & lLong.preference) = 0 then
|
|
GenImplied(m_pha);
|
|
end {if q = 0}
|
|
else begin
|
|
if gLong.fixedDisp then begin
|
|
GenNative(m_ldy_imm, immediate, q+2, nil, 0);
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0);
|
|
if (A_X & lLong.preference) <> 0 then
|
|
GenImplied(m_tax)
|
|
else
|
|
GenImplied(m_pha);
|
|
GenNative(m_ldy_imm, immediate, q, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_tya);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, q+2, nil, 0);
|
|
GenImplied(m_tay);
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0);
|
|
if (A_X & lLong.preference) <> 0 then
|
|
GenImplied(m_tax)
|
|
else
|
|
GenImplied(m_pha);
|
|
GenImplied(m_dey);
|
|
GenImplied(m_dey);
|
|
end; {else}
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0);
|
|
if (A_X & lLong.preference) = 0 then
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
end {if glong.where = inPointer}
|
|
else if gLong.where = localAddress then begin
|
|
gLong.disp := gLong.disp+q;
|
|
if gLong.fixedDisp then
|
|
if (gLong.disp < 254) and (gLong.disp >= 0) then begin
|
|
GenNative(m_lda_dir, direct, gLong.disp, nil, 0);
|
|
GenNative(m_ldx_dir, direct, gLong.disp+2, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, gLong.disp, nil, 0);
|
|
GenNative(m_lda_dirX, direct, 0, nil, 0);
|
|
GenNative(m_ldy_dirX, direct, 2, nil, 0);
|
|
GenImplied(m_tyx);
|
|
end {else}
|
|
else begin
|
|
if (gLong.disp >= 254) or (gLong.disp < 0) then begin
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
GenImplied(m_tax);
|
|
gLong.disp := 0;
|
|
end; {if}
|
|
GenNative(m_ldy_dirX, direct, gLong.disp+2, nil, 0);
|
|
GenNative(m_lda_dirX, direct, gLong.disp, nil, 0);
|
|
GenImplied(m_tyx);
|
|
end; {else}
|
|
if (A_X & lLong.preference) = 0 then begin
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end; {if}
|
|
end {else if gLong.where = localAddress}
|
|
else {if gLong.where = globalLabel then} begin
|
|
gLong.disp := gLong.disp+q;
|
|
if gLong.fixedDisp then
|
|
if smallMemoryModel then begin
|
|
GenNative(m_lda_abs, absolute, gLong.disp, gLong.lab, 0);
|
|
GenNative(m_ldx_abs, absolute, gLong.disp+2, gLong.lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_long, longAbs, gLong.disp+2, gLong.lab, 0);
|
|
GenImplied(m_tax);
|
|
GenNative(m_lda_long, longAbs, gLong.disp, gLong.lab, 0);
|
|
end {else}
|
|
else
|
|
if smallMemoryModel then begin
|
|
GenNative(m_ldy_absX, absolute, gLong.disp+2, gLong.lab, 0);
|
|
GenNative(m_lda_absX, absolute, gLong.disp, gLong.lab, 0);
|
|
GenImplied(m_tyx);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_longX, longAbs, gLong.disp+2, gLong.lab, 0);
|
|
GenImplied(m_tay);
|
|
GenNative(m_lda_longX, longAbs, gLong.disp, gLong.lab, 0);
|
|
GenImplied(m_tyx);
|
|
end; {else}
|
|
if (A_X & lLong.preference) = 0 then begin
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end; {if}
|
|
end; {else}
|
|
if (A_X & lLong.preference) <> 0 then
|
|
gLong.where := A_X
|
|
else
|
|
gLong.where := onStack;
|
|
end; {cgLong,cgULong}
|
|
|
|
cgByte,cgUByte,cgWord,cgUWord: begin
|
|
GetPointer(op^.left);
|
|
if gLong.where = inPointer then begin
|
|
if q = 0 then
|
|
if gLong.fixedDisp then
|
|
GenNative(m_lda_indl, direct, gLong.disp, nil, 0)
|
|
else
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0)
|
|
else
|
|
if gLong.fixedDisp then begin
|
|
GenNative(m_ldy_imm, immediate, q, nil, 0);
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0)
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_tya);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, q, nil, 0);
|
|
GenImplied(m_tay);
|
|
GenNative(m_lda_indly, direct, gLong.disp, nil, 0)
|
|
end; {else}
|
|
end {if}
|
|
else if gLong.where = localAddress then begin
|
|
gLong.disp := gLong.disp+q;
|
|
if gLong.fixedDisp then
|
|
if (gLong.disp & $FF00) = 0 then
|
|
GenNative(m_lda_dir, direct, gLong.disp, nil, 0)
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, gLong.disp, nil, 0);
|
|
GenNative(m_lda_dirX, direct, 0, nil, 0);
|
|
end {else}
|
|
else
|
|
if (gLong.disp & $FF00) = 0 then
|
|
GenNative(m_lda_dirX, direct, gLong.disp, nil, 0)
|
|
else begin
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
GenImplied(m_tax);
|
|
GenNative(m_lda_dirX, direct, 0, nil, 0);
|
|
end {else}
|
|
end {else if}
|
|
else {if gLong.where = globalLabel then} begin
|
|
gLong.disp := gLong.disp+q;
|
|
if gLong.fixedDisp then
|
|
if smallMemoryModel then
|
|
GenNative(m_lda_abs, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_lda_long, longAbs, gLong.disp, gLong.lab, 0)
|
|
else
|
|
if smallMemoryModel then
|
|
GenNative(m_lda_absX, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_lda_longX, longAbs, gLong.disp, gLong.lab, 0)
|
|
end; {else}
|
|
if optype in [cgByte,cgUByte] then begin
|
|
GenNative(m_and_imm, immediate, 255, nil, 0);
|
|
if optype = cgByte then begin
|
|
GenNative(m_cmp_imm, immediate, 128, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
GenNative(m_ora_imm, immediate, $FF00, nil, 0);
|
|
GenLab(lab1);
|
|
end; {if}
|
|
end; {if}
|
|
end; {case cgByte,cgUByte,cgWord,cgUWord}
|
|
|
|
otherwise: ;
|
|
end; {case}
|
|
end; {GenInd}
|
|
|
|
|
|
procedure GenIxa (op: icptr);
|
|
|
|
{ Generate code for a pc_ixa }
|
|
|
|
var
|
|
lab1: integer; {branch label}
|
|
lLong: longType; {type of address}
|
|
zero: boolean; {is the index 0?}
|
|
|
|
|
|
procedure Index;
|
|
|
|
{ Get the index size }
|
|
|
|
var
|
|
lLong: longType; {temp for preserving left node info}
|
|
|
|
begin {Index}
|
|
zero := false;
|
|
with op^.right^ do begin
|
|
if opcode = pc_ldc then begin
|
|
if q = 0 then
|
|
zero := true
|
|
else
|
|
GenNative(m_lda_imm, immediate, q, nil, 0);
|
|
end {if}
|
|
else begin
|
|
lLong := gLong;
|
|
GenTree(op^.right);
|
|
gLong := lLong;
|
|
end; {else}
|
|
end; {with}
|
|
end; {Index}
|
|
|
|
|
|
begin {GenIxa}
|
|
if smallMemoryModel then begin
|
|
lLong := gLong;
|
|
gLong.preference := inPointer+localAddress+globalLabel;
|
|
GenTree(op^.left);
|
|
case gLong.where of
|
|
|
|
onStack: begin
|
|
Index;
|
|
if not zero then begin
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_s, direct, 1, nil, 0);
|
|
GenNative(m_sta_s, direct, 1, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
GenNative(m_lda_s, direct, 3, nil, 0);
|
|
GenImplied(m_ina);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
GenLab(lab1);
|
|
end; {if}
|
|
end; {case onStack}
|
|
|
|
inPointer: begin
|
|
if not gLong.fixedDisp then begin
|
|
if Complex(op^.right) then begin
|
|
GenImplied(m_phy);
|
|
Index;
|
|
if not zero then begin
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_s, direct, 1, nil, 0);
|
|
GenNative(m_sta_s, direct, 1, nil, 0);
|
|
end; {if}
|
|
GenImplied(m_ply);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_tya);
|
|
GenImplied(m_clc);
|
|
OperA(m_adc_imm, op^.right);
|
|
GenImplied(m_tay);
|
|
end; {else}
|
|
end {if}
|
|
else begin
|
|
Index;
|
|
if not zero then begin
|
|
GenImplied(m_tay);
|
|
gLong.fixedDisp := false;
|
|
end; {if}
|
|
end; {else}
|
|
if (inPointer & lLong.preference) = 0 then begin
|
|
if not gLong.fixedDisp then begin
|
|
GenImplied(m_tya);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_dir, direct, gLong.disp, nil, 0);
|
|
GenNative(m_ldx_dir, direct, gLong.disp+2, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
GenImplied(m_inx);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_ldx_dir, direct, gLong.disp+2, nil, 0);
|
|
GenNative(m_lda_dir, direct, gLong.disp, nil, 0);
|
|
end; {else}
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
gLong.where := onStack;
|
|
end; {if}
|
|
end; {case inPointer}
|
|
|
|
localAddress,globalLabel: begin
|
|
if not gLong.fixedDisp then begin
|
|
if Complex(op^.right) then begin
|
|
GenImplied(m_phx);
|
|
Index;
|
|
if not zero then begin
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_s, direct, 1, nil, 0);
|
|
GenNative(m_sta_s, direct, 1, nil, 0);
|
|
end; {if}
|
|
GenImplied(m_plx);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
OperA(m_adc_imm, op^.right);
|
|
GenImplied(m_tax);
|
|
end; {else}
|
|
end {if}
|
|
else if Complex(op^.right) then begin
|
|
Index;
|
|
if not zero then begin
|
|
GenImplied(m_tax);
|
|
gLong.fixedDisp := false;
|
|
end; {if}
|
|
end {else if}
|
|
else begin
|
|
LoadX(op^.right);
|
|
gLong.fixedDisp := false;
|
|
end; {else}
|
|
if (lLong.preference & gLong.where) = 0 then begin
|
|
if (lLong.preference & inPointer) <> 0 then begin
|
|
if gLong.where = localAddress then begin
|
|
if not gLong.fixedDisp then begin
|
|
GenNative(m_stz_dir, direct, dworkLoc+2, nil, 0);
|
|
GenImplied(m_phx);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
if gLong.disp <> 0 then
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
GenNative(m_adc_s, direct, 1, nil, 0);
|
|
GenNative(m_sta_dir, direct, dworkLoc, nil, 0);
|
|
GenImplied(m_plx);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_stz_dir, direct, dworkLoc+2, nil, 0);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
GenNative(m_sta_dir, direct, dworkLoc, nil, 0);
|
|
end; {else}
|
|
end {if}
|
|
else begin
|
|
if not gLong.fixedDisp then begin
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, gLong.lab, 0);
|
|
GenNative(m_sta_dir, direct, dworkLoc, nil, 0);
|
|
GenNative(m_ldx_imm, immediate, gLong.disp, gLong.lab, shift16);
|
|
lab1 := GenLabel;
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
GenImplied(m_inx);
|
|
GenLab(lab1);
|
|
GenNative(m_stx_dir, direct, dworkLoc+2, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_imm, immediate, gLong.disp, gLong.lab, shift16);
|
|
GenNative(m_sta_dir, direct, dworkLoc+2, nil, 0);
|
|
GenNative(m_lda_imm, immediate, gLong.disp, gLong.lab, 0);
|
|
GenNative(m_sta_dir, direct, dworkLoc, nil, 0);
|
|
end; {else}
|
|
end; {else}
|
|
gLong.where := inPointer;
|
|
gLong.fixedDisp := true;
|
|
gLong.disp := dworkLoc;
|
|
end {if}
|
|
else begin
|
|
if gLong.where = localAddress then begin
|
|
if not gLong.fixedDisp then begin
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenImplied(m_phx);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_s, direct, 1, nil, 0);
|
|
if gLong.disp <> 0 then
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
GenNative(m_sta_s, direct, 1, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
end {if}
|
|
else begin
|
|
if not gLong.fixedDisp then begin
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, gLong.lab, 0);
|
|
GenNative(m_ldx_imm, immediate, gLong.disp, gLong.lab, shift16);
|
|
lab1 := GenLabel;
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
GenImplied(m_inx);
|
|
GenLab(lab1);
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_pea, immediate, gLong.disp, gLong.lab, shift16);
|
|
GenNative(m_pea, immediate, gLong.disp, gLong.lab, 0);
|
|
end; {else}
|
|
end; {else}
|
|
gLong.where := onStack;
|
|
end; {else}
|
|
end; {if}
|
|
end; {case localAddress,globalLabel}
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end {if smallMemoryModel or (op^.right^.opcode = pc_ldc)}
|
|
else begin
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
GenTree(op^.right);
|
|
if op^.optype in [cgByte,cgWord] then begin
|
|
lab1 := GenLabel;
|
|
GenNative(m_ldx_imm, immediate, $0000, nil, 0);
|
|
GenImplied(m_tay);
|
|
GenNative(m_bpl, relative, lab1, nil, 0);
|
|
GenImplied(m_dex);
|
|
GenLab(lab1);
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end {else if}
|
|
else begin
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
GenImplied(m_clc);
|
|
GenImplied(m_pla);
|
|
GenNative(m_adc_s, direct, 3, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
GenImplied(m_pla);
|
|
GenNative(m_adc_s, direct, 3, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
gLong.where := onStack;
|
|
end; {else}
|
|
end; {GenIxa}
|
|
|
|
|
|
procedure GenLilLliLdlLld (op: icptr);
|
|
|
|
{ Generate code for a pc_lil, pc_lli, pc_ldl or pc_lld }
|
|
|
|
var
|
|
disp: integer; {load location}
|
|
lab1: integer; {branch point}
|
|
opcode: pcodes; {op^.opcode}
|
|
|
|
|
|
procedure DoXIncDec (op: pcodes; p: integer);
|
|
|
|
{ Do a decrement or increment on a local four byte value X }
|
|
{ bytes into the stack frame }
|
|
{ }
|
|
{ parameters }
|
|
{ op - operation code }
|
|
{ p - number to ind/dec by }
|
|
|
|
var
|
|
lab1: integer; {branch point}
|
|
|
|
begin {DoXIncDec}
|
|
if op in [pc_lil,pc_lli] then begin
|
|
lab1 := GenLabel;
|
|
if p = 1 then begin
|
|
GenNative(m_inc_dirx, direct, 0, nil, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_clc);
|
|
GenNative(m_lda_dirx, direct, 0, nil, 0);
|
|
GenNative(m_adc_imm, immediate, p, nil, 0);
|
|
GenNative(m_sta_dirx, direct, 0, nil, 0);
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
end; {else}
|
|
GenNative(m_inc_dirx, direct, 2, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else {if op in [pc_gdl,pc_gld] then} begin
|
|
lab1 := GenLabel;
|
|
if p = 1 then begin
|
|
GenNative(m_lda_dirx, direct, 0, nil, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
GenNative(m_dec_dirx, direct, 2, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_dec_dirx, direct, 0, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_sec);
|
|
GenNative(m_lda_dirx, direct, 0, nil, 0);
|
|
GenNative(m_sbc_imm, immediate, p, nil, 0);
|
|
GenNative(m_sta_dirx, direct, 0, nil, 0);
|
|
GenNative(m_bcs, relative, lab1, nil, 0);
|
|
GenNative(m_dec_dirx, direct, 2, nil, 0);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
end; {else}
|
|
end; {DoXIncDec}
|
|
|
|
|
|
procedure DoLIncDec (op: pcodes; disp, p: integer);
|
|
|
|
{ Do a decrement or increment on a local four byte value }
|
|
{ }
|
|
{ parameters }
|
|
{ op - operation code }
|
|
{ disp - disp in stack frame to value }
|
|
{ p - number to ind/dec by }
|
|
|
|
var
|
|
lab1: integer; {branch point}
|
|
|
|
begin {DoLIncDec}
|
|
if op in [pc_lil,pc_lli] then begin
|
|
lab1 := GenLabel;
|
|
if p = 1 then begin
|
|
GenNative(m_inc_dir, direct, disp, nil, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_clc);
|
|
GenNative(m_lda_dir, direct, disp, nil, 0);
|
|
GenNative(m_adc_imm, immediate, p, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
end; {else}
|
|
GenNative(m_inc_dir, direct, disp+2, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else {if op in [pc_ldl,pc_lld] then} begin
|
|
lab1 := GenLabel;
|
|
if p = 1 then begin
|
|
GenNative(m_lda_dir, direct, disp, nil, 0);
|
|
GenNative(m_bne, relative, lab1, nil, 0);
|
|
GenNative(m_dec_dir, direct, disp+2, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_dec_dir, direct, disp, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_sec);
|
|
GenNative(m_lda_dir, direct, disp, nil, 0);
|
|
GenNative(m_sbc_imm, immediate, p, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
GenNative(m_bcs, relative, lab1, nil, 0);
|
|
GenNative(m_dec_dir, direct, disp+2, nil, 0);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
end; {else}
|
|
end; {DoLIncDec}
|
|
|
|
|
|
begin {GenLilLliLdlLld}
|
|
disp := LabelToDisp(op^.r);
|
|
opcode := op^.opcode;
|
|
case op^.optype of
|
|
cgLong, cgULong: begin
|
|
gLong.where := onStack;
|
|
if disp >= 254 then begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
if opcode in [pc_lil,pc_ldl] then
|
|
DoXIncDec(opcode, op^.q);
|
|
if not skipLoad then begin
|
|
GenNative(m_lda_dirx, direct, 2, nil, 0);
|
|
GenImplied(m_pha);
|
|
GenNative(m_lda_dirx, direct, 0, nil, 0);
|
|
GenImplied(m_pha);
|
|
end {if}
|
|
else
|
|
gLong.where := A_X;
|
|
if opcode in [pc_lli,pc_lld] then
|
|
DoXIncDec(opcode, op^.q);
|
|
end {if}
|
|
else begin
|
|
if opcode in [pc_lil,pc_ldl] then
|
|
DoLIncDec(opcode, disp, op^.q);
|
|
if not skipLoad then begin
|
|
GenNative(m_pei_dir, direct, disp+2, nil, 0);
|
|
GenNative(m_pei_dir, direct, disp, nil, 0);
|
|
end {if}
|
|
else
|
|
gLong.where := A_X;
|
|
if opcode in [pc_lli,pc_lld] then
|
|
DoLIncDec(opcode, disp, op^.q);
|
|
end; {else}
|
|
end;
|
|
|
|
cgByte, cgUByte, cgWord, cgUWord: begin
|
|
if op^.optype in [cgByte,cgUByte] then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if disp >= 256 then begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
if opcode = pc_lil then
|
|
GenNative(m_inc_dirx, direct, 0, nil, 0)
|
|
else if opcode = pc_ldl then
|
|
GenNative(m_dec_dirx, direct, 0, nil, 0);
|
|
if not skipLoad then
|
|
GenNative(m_lda_dirx, direct, 0, nil, 0);
|
|
if opcode = pc_lli then
|
|
GenNative(m_inc_dirx, direct, 0, nil, 0)
|
|
else if opcode = pc_lld then
|
|
GenNative(m_dec_dirx, direct, 0, nil, 0);
|
|
end
|
|
else begin
|
|
if opcode = pc_lil then
|
|
GenNative(m_inc_dir, direct, disp, nil, 0)
|
|
else if opcode = pc_ldl then
|
|
GenNative(m_dec_dir, direct, disp, nil, 0);
|
|
if not skipLoad then
|
|
GenNative(m_lda_dir, direct, disp, nil, 0);
|
|
if opcode = pc_lli then
|
|
GenNative(m_inc_dir, direct, disp, nil, 0)
|
|
else if opcode = pc_lld then
|
|
GenNative(m_dec_dir, direct, disp, nil, 0);
|
|
end; {else}
|
|
if op^.optype in [cgByte,cgUByte] then begin
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
if not skipLoad then begin
|
|
GenNative(m_and_imm, immediate, $00FF, nil, 0);
|
|
if op^.optype = cgByte then begin
|
|
GenNative(m_bit_imm, immediate, $0080, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_ora_imm, immediate, $FF00, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_cmp_imm, immediate, $0000, nil, 0);
|
|
end; {if}
|
|
end; {if}
|
|
end; {if}
|
|
end;
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
|
|
end; {case}
|
|
end; {GenLilLliLdlLld}
|
|
|
|
|
|
procedure GenLogic (op: icptr);
|
|
|
|
{ generate a pc_and, pc_ior, pc_bnd, pc_bor or pc_bxr }
|
|
|
|
var
|
|
lab1,lab2: integer; {label}
|
|
nd: icptr; {temp node pointer}
|
|
opcode: pcodes; {operation code}
|
|
|
|
begin {GenLogic}
|
|
opcode := op^.opcode;
|
|
if opcode in [pc_and,pc_ior] then begin
|
|
lab1 := GenLabel;
|
|
GenTree(op^.left);
|
|
GenNative(m_cmp_imm, immediate, 0, nil, 0);
|
|
lab2 := GenLabel;
|
|
if opcode = pc_and then
|
|
GenNative(m_bne, relative, lab2, nil, 0)
|
|
else begin
|
|
GenNative(m_beq, relative, lab2, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 1, nil, 0);
|
|
end; {else}
|
|
GenNative(m_brl, longrelative, lab1, nil, 0);
|
|
GenLab(lab2);
|
|
GenTree(op^.right);
|
|
GenNative(m_cmp_imm, immediate, 0, nil, 0);
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 1, nil, 0);
|
|
GenLab(lab1);
|
|
end {if}
|
|
else begin
|
|
if not Complex(op^.left) then
|
|
if Complex(op^.right) then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
GenTree(op^.left);
|
|
if Complex(op^.right) then begin
|
|
GenImplied(m_pha);
|
|
GenTree(op^.right);
|
|
case opcode of
|
|
pc_and,pc_bnd: GenNative(m_and_s, direct, 1, nil, 0);
|
|
pc_ior,pc_bor: GenNative(m_ora_s, direct, 1, nil, 0);
|
|
pc_bxr: GenNative(m_eor_s, direct, 1, nil, 0);
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
GenImplied(m_plx);
|
|
GenImplied(m_tax);
|
|
end {if}
|
|
else
|
|
case opcode of
|
|
pc_and,pc_bnd: OperA(m_and_imm, op^.right);
|
|
pc_ior,pc_bor: OperA(m_ora_imm, op^.right);
|
|
pc_bxr: OperA(m_eor_imm, op^.right);
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {else}
|
|
end; {GenLogic}
|
|
|
|
|
|
procedure GenSroCpo (op: icptr);
|
|
|
|
{ Generate code for a pc_sro or pc_cpo }
|
|
|
|
var
|
|
lab: stringPtr; {op^.lab}
|
|
lab1: integer; {branch point}
|
|
lval: longint; {op^.left^.lval}
|
|
opcode: pcodes; {op^.opcode}
|
|
optype: baseTypeEnum; {op^.optype}
|
|
q: integer; {op^.q}
|
|
special: boolean; {special save?}
|
|
|
|
begin {GenSroCpo}
|
|
opcode := op^.opcode;
|
|
optype := op^.optype;
|
|
q := op^.q;
|
|
lab := op^.lab;
|
|
case optype of
|
|
cgByte, cgUByte: begin
|
|
if smallMemoryModel and (op^.left^.opcode = pc_ldc)
|
|
and (op^.left^.q = 0) and (opcode = pc_sro) then begin
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
GenNative(m_stz_abs, absolute, q, lab, 0);
|
|
end {if}
|
|
else begin
|
|
if op^.opcode = pc_sro then
|
|
if op^.left^.opcode = pc_cnv then
|
|
if (op^.left^.q >> 4) in [ord(cgWord),ord(cgUWord)] then
|
|
op^.left := op^.left^.left;
|
|
if op^.left^.opcode in [pc_ldc,pc_ldc,pc_lod] then begin
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
GenTree(op^.left);
|
|
end {if}
|
|
else begin
|
|
GenTree(op^.left);
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
end; {else}
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, q, lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
end; {else}
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
end;
|
|
|
|
cgWord, cgUWord:
|
|
if smallMemoryModel and (op^.left^.opcode = pc_ldc)
|
|
and (op^.left^.q = 0) and (opcode = pc_sro) then
|
|
GenNative(m_stz_abs, absolute, q, lab, 0)
|
|
else begin
|
|
GenTree(op^.left);
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, q, lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
end; {else}
|
|
|
|
cgReal, cgDouble, cgComp, cgExtended: begin
|
|
GenTree(op^.left);
|
|
GenNative(m_pea, immediate, q, lab, shift16);
|
|
GenNative(m_pea, immediate, q, lab, 0);
|
|
if opcode = pc_sro then begin
|
|
if optype = cgReal then
|
|
GenCall(9)
|
|
else if optype = cgDouble then
|
|
GenCall(10)
|
|
else if optype = cgComp then
|
|
GenCall(66)
|
|
else {if optype = cgExtended then}
|
|
GenCall(67);
|
|
end {if}
|
|
else {if opcode = pc_cpo then} begin
|
|
if optype = cgReal then
|
|
GenCall(51)
|
|
else if optype = cgDouble then
|
|
GenCall(52)
|
|
else if optype = cgComp then
|
|
GenCall(68)
|
|
else {if optype = cgExtended then}
|
|
GenCall(69);
|
|
end; {else}
|
|
end;
|
|
|
|
cgLong, cgULong: begin
|
|
if (opcode = pc_sro) and (op^.left^.opcode in [pc_adl,pc_sbl]) then
|
|
GenAdlSbl(op^.left, op)
|
|
else if (opcode = pc_sro) and (op^.left^.opcode in [pc_inc,pc_dec]) then
|
|
GenIncDec(op^.left, op)
|
|
else if smallMemoryModel and (op^.left^.opcode = pc_ldc) then begin
|
|
lval := op^.left^.lval;
|
|
if long(lval).lsw = 0 then
|
|
GenNative(m_stz_abs, absolute, q, lab, 0)
|
|
else begin
|
|
GenNative(m_lda_imm, immediate, long(lval).lsw, nil, 0);
|
|
GenNative(m_sta_abs, absolute, q, lab, 0)
|
|
end; {else}
|
|
if long(lval).msw = 0 then
|
|
GenNative(m_stz_abs, absolute, q+2, lab, 0)
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, long(lval).msw, nil, 0);
|
|
GenNative(m_stx_abs, absolute, q+2, lab, 0)
|
|
end; {else}
|
|
if op^.opcode = pc_cpo then
|
|
GenTree(op^.left);
|
|
end {if}
|
|
else begin
|
|
if op^.opcode = pc_sro then
|
|
gLong.preference := A_X | inPointer | localAddress | globalLabel | constant
|
|
else
|
|
gLong.preference := gLong.preference &
|
|
(A_X | inPointer | localAddress | globalLabel | constant);
|
|
GenTree(op^.left);
|
|
case gLong.where of
|
|
|
|
A_X: begin
|
|
if smallMemoryModel then begin
|
|
GenNative(m_stx_abs, absolute, q+2, lab, 0);
|
|
GenNative(m_sta_abs, absolute, q, lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
if opcode = pc_cpo then
|
|
GenImplied(m_pha);
|
|
GenImplied(m_txa);
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
if opcode = pc_cpo then
|
|
GenImplied(m_pla);
|
|
end; {else}
|
|
end;
|
|
|
|
onStack: begin
|
|
if opcode = pc_sro then
|
|
GenImplied(m_pla)
|
|
else {if opcode = pc_cpo then}
|
|
GenNative(m_lda_s, direct, 1, nil, 0);
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, q, lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
if opcode = pc_sro then
|
|
GenImplied(m_pla)
|
|
else {if opcode = pc_cpo then}
|
|
GenNative(m_lda_s, direct, 3, nil, 0);
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, q+2, lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
end;
|
|
|
|
inPointer: begin
|
|
GenNative(m_ldx_dir, direct, gLong.disp+2, nil, 0);
|
|
if gLong.fixedDisp then
|
|
GenNative(m_lda_dir, direct, gLong.disp, nil, 0)
|
|
else begin
|
|
GenImplied(m_tya);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_dir, direct, gLong.disp, nil, 0);
|
|
if not smallMemoryModel then begin
|
|
lab1 := GenLabel;
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
GenImplied(m_inx);
|
|
GenLab(lab1);
|
|
end; {if}
|
|
end; {else}
|
|
if smallMemoryModel then begin
|
|
GenNative(m_stx_abs, absolute, q+2, lab, 0);
|
|
GenNative(m_sta_abs, absolute, q, lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
if opcode = pc_cpo then
|
|
GenImplied(m_pha);
|
|
GenImplied(m_txa);
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
if opcode = pc_cpo then
|
|
GenImplied(m_pla);
|
|
end; {else}
|
|
gLong.where := A_X;
|
|
end;
|
|
|
|
localAddress: begin
|
|
if smallMemoryModel then
|
|
GenNative(m_stz_abs, absolute, q+2, lab, 0)
|
|
else begin
|
|
GenNative(m_lda_imm, immediate, 0, nil, 0);
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
end; {else}
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
if not gLong.fixedDisp then begin
|
|
GenImplied(m_phx);
|
|
GenNative(m_adc_s, direct, 1, nil, 0);
|
|
GenImplied(m_plx);
|
|
end; {if}
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, q, lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
end;
|
|
|
|
globalLabel:
|
|
if gLong.fixedDisp then begin
|
|
if smallMemoryModel then begin
|
|
GenNative(m_lda_imm, immediate, gLong.disp, gLong.lab, 0);
|
|
GenNative(m_ldx_imm, immediate, gLong.disp, gLong.lab, shift16);
|
|
GenNative(m_stx_abs, absolute, q+2, lab, 0);
|
|
GenNative(m_sta_abs, absolute, q, lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_imm, immediate, gLong.disp, gLong.lab, shift16);
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
if opcode = pc_cpo then
|
|
GenImplied(m_tax);
|
|
GenNative(m_lda_imm, immediate, gLong.disp, gLong.lab, 0);
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
end; {else}
|
|
gLong.where := A_X;
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, gLong.lab, 0);
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, q, lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
GenNative(m_lda_imm, immediate, gLong.disp, gLong.lab, shift16);
|
|
GenNative(m_adc_imm, immediate, 0, nil, 0);
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, q+2, lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
end; {else}
|
|
|
|
constant: begin
|
|
if gLong.lval = 0 then begin
|
|
if smallMemoryModel then begin
|
|
GenNative(m_stz_abs, absolute, q+2, lab, 0);
|
|
GenNative(m_stz_abs, absolute, q, lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_imm, immediate, 0, nil, 0);
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
end; {else}
|
|
end {if}
|
|
else if not smallMemoryModel then begin
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).msw, nil, 0);
|
|
GenNative(m_sta_long, longabsolute, q+2, lab, 0);
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).lsw, nil, 0);
|
|
GenNative(m_sta_long, longabsolute, q, lab, 0);
|
|
end {else if}
|
|
else begin
|
|
if long(gLong.lval).msw = 0 then
|
|
GenNative(m_stz_abs, absolute, q+2, lab, 0)
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, long(gLong.lval).msw, nil, 0);
|
|
GenNative(m_stx_abs, absolute, q+2, lab, 0);
|
|
end; {else}
|
|
if long(gLong.lval).lsw = 0 then
|
|
GenNative(m_stz_abs, absolute, q, lab, 0)
|
|
else begin
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).lsw, nil, 0);
|
|
GenNative(m_sta_abs, absolute, q, lab, 0);
|
|
end; {else}
|
|
if (long(gLong.lval).lsw <> 0) and (long(gLong.lval).msw <> 0) then
|
|
gLong.where := A_X;
|
|
end; {else}
|
|
end; {case constant}
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {else}
|
|
end; {case CGLong, cgULong}
|
|
end; {case}
|
|
end; {GenSroCpo}
|
|
|
|
|
|
procedure GenStoCpi (op: icptr);
|
|
|
|
{ Generate code for a pc_sto or pc_cpi }
|
|
|
|
var
|
|
disp: integer; {disp in stack frame}
|
|
opcode: pcodes; {temp storage for op code}
|
|
optype: baseTypeEnum; {operand type}
|
|
short: boolean; {use short registers?}
|
|
simple: boolean; {is the load a simple load?}
|
|
lLong: longType; {address record for left node}
|
|
zero: boolean; {is the operand a constant zero?}
|
|
|
|
|
|
procedure LoadLSW;
|
|
|
|
{ load the least significant word of a four byte value }
|
|
|
|
begin {LoadLSW}
|
|
if lLong.where = onStack then
|
|
if opcode = pc_sto then
|
|
GenImplied(m_pla)
|
|
else
|
|
GenNative(m_lda_s, direct, 1, nil, 0)
|
|
else {if lLong.where = constant then}
|
|
GenNative(m_lda_imm, immediate, long(lLong.lval).lsw, nil, 0);
|
|
end; {LoadLSW}
|
|
|
|
|
|
procedure LoadMSW;
|
|
|
|
{ load the most significant word of a four byte value }
|
|
{ }
|
|
{ Note: LoadLSW MUST be called first! }
|
|
|
|
begin {LoadMSW}
|
|
if lLong.where = onStack then
|
|
if opcode = pc_sto then
|
|
GenImplied(m_pla)
|
|
else
|
|
GenNative(m_lda_s, direct, 3, nil, 0)
|
|
else {if lLong.where = constant then}
|
|
GenNative(m_lda_imm, immediate, long(lLong.lval).msw, nil, 0);
|
|
end; {LoadMSW}
|
|
|
|
|
|
procedure LoadWord;
|
|
|
|
{ Get the operand for a cgByte, cgUByte, cgWord or cgUWord }
|
|
{ into the accumulator }
|
|
|
|
begin {LoadWord}
|
|
if simple then begin
|
|
with op^.right^ do
|
|
if opcode = pc_ldc then
|
|
GenNative(m_lda_imm, immediate, q, nil, 0)
|
|
else if opcode = pc_lod then
|
|
GenNative(m_lda_dir, direct, LabelToDisp(r) + q, nil, 0)
|
|
else {if opcode = pc_ldo then}
|
|
if smallMemoryModel then
|
|
GenNative(m_lda_abs, absolute, q, lab, 0)
|
|
else
|
|
GenNative(m_lda_long, longabsolute, q, lab, 0);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_pla);
|
|
if short then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
end {else}
|
|
end; {LoadWord}
|
|
|
|
|
|
begin {GenStoCpi}
|
|
opcode := op^.opcode;
|
|
optype := op^.optype;
|
|
case optype of
|
|
|
|
cgReal,cgDouble,cgComp,cgExtended: begin
|
|
GenTree(op^.right);
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
if optype = cgReal then begin
|
|
if opcode = pc_sto then
|
|
GenCall(9)
|
|
else
|
|
GenCall(51);
|
|
end {if}
|
|
else if optype = cgDouble then begin
|
|
if opcode = pc_sto then
|
|
GenCall(10)
|
|
else
|
|
GenCall(52);
|
|
end {else if}
|
|
else if optype = cgComp then begin
|
|
if opcode = pc_sto then
|
|
GenCall(66)
|
|
else
|
|
GenCall(68);
|
|
end {else if}
|
|
else {if optype = cgExtended then} begin
|
|
if opcode = pc_sto then
|
|
GenCall(67)
|
|
else
|
|
GenCall(69);
|
|
end; {else}
|
|
end; {case cgReal,cgDouble,cgComp,cgExtended}
|
|
|
|
cgLong,cgULong: begin
|
|
if opcode = pc_sto then
|
|
gLong.preference := onStack+constant
|
|
else
|
|
gLong.preference := (onStack+constant) & gLong.preference;
|
|
GenTree(op^.right);
|
|
lLong := gLong;
|
|
gLong.preference := localAddress+inPointer+globalLabel+A_X;
|
|
GenTree(op^.left);
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dir, direct, dworkLoc, nil, 0);
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dir, direct, dworkLoc+2, nil, 0);
|
|
LoadLSW;
|
|
GenNative(m_sta_indl, direct, dworkLoc, nil, 0);
|
|
GenNative(m_ldy_imm, immediate, 2, nil, 0);
|
|
LoadMSW;
|
|
GenNative(m_sta_indly, direct, dworkLoc, nil, 0);
|
|
end {if}
|
|
else if gLong.where = A_X then begin
|
|
GenNative(m_sta_dir, direct, dworkLoc, nil, 0);
|
|
GenNative(m_stx_dir, direct, dworkLoc+2, nil, 0);
|
|
LoadLSW;
|
|
GenNative(m_sta_indl, direct, dworkLoc, nil, 0);
|
|
GenNative(m_ldy_imm, immediate, 2, nil, 0);
|
|
LoadMSW;
|
|
GenNative(m_sta_indly, direct, dworkLoc, nil, 0);
|
|
end {if}
|
|
else if gLong.where = localAddress then begin
|
|
LoadLSW;
|
|
if gLong.fixedDisp then
|
|
if (gLong.disp & $FF00) = 0 then
|
|
GenNative(m_sta_dir, direct, gLong.disp, nil, 0)
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, gLong.disp, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
end {else}
|
|
else begin
|
|
if (gLong.disp >= 254) or (gLong.disp < 0) then begin
|
|
GenImplied(m_tay);
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
GenImplied(m_tax);
|
|
GenImplied(m_tya);
|
|
gLong.disp := 0;
|
|
end; {if}
|
|
GenNative(m_sta_dirX, direct, gLong.disp, nil, 0);
|
|
end; {else}
|
|
LoadMSW;
|
|
if gLong.fixedDisp then
|
|
if ((gLong.disp+2) & $FF00) = 0 then
|
|
GenNative(m_sta_dir, direct, gLong.disp+2, nil, 0)
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, gLong.disp+2, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
end {else}
|
|
else begin
|
|
if (gLong.disp >= 254) or (gLong.disp < 0) then begin
|
|
GenImplied(m_tay);
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
GenImplied(m_tax);
|
|
GenImplied(m_tya);
|
|
gLong.disp := 0;
|
|
end; {if}
|
|
GenNative(m_sta_dirX, direct, gLong.disp+2, nil, 0);
|
|
end; {else}
|
|
end {else if}
|
|
else if gLong.where = globalLabel then begin
|
|
LoadLSW;
|
|
if gLong.fixedDisp then
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longAbs, gLong.disp, gLong.lab, 0)
|
|
else
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_absX, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_sta_longX, longAbs, gLong.disp, gLong.lab, 0);
|
|
LoadMSW;
|
|
if gLong.fixedDisp then
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, gLong.disp+2, gLong.lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longAbs, gLong.disp+2, gLong.lab, 0)
|
|
else
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_absX, absolute, gLong.disp+2, gLong.lab, 0)
|
|
else
|
|
GenNative(m_sta_longX, longAbs, gLong.disp+2, gLong.lab, 0);
|
|
end {else if}
|
|
else begin
|
|
LoadLSW;
|
|
if gLong.fixedDisp = true then begin
|
|
GenNative(m_sta_indl, direct, gLong.disp, nil, 0);
|
|
GenNative(m_ldy_imm, immediate, 2, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_sta_indlY, direct, gLong.disp, nil, 0);
|
|
GenImplied(m_iny);
|
|
GenImplied(m_iny);
|
|
end; {else}
|
|
LoadMSW;
|
|
GenNative(m_sta_indly, direct, gLong.Disp, nil, 0);
|
|
end; {else}
|
|
gLong := lLong;
|
|
end; {case cgLong,cgULong}
|
|
|
|
cgByte,cgUByte,cgWord,cgUWord: begin
|
|
short := optype in [cgByte,cgUByte];
|
|
simple := false;
|
|
zero := false;
|
|
if op^.opcode = pc_sto then begin
|
|
if short then
|
|
if op^.right^.opcode = pc_cnv then
|
|
if (op^.right^.q >> 4) in [ord(cgWord),ord(cgUWord)] then
|
|
op^.right := op^.right^.left;
|
|
with op^.right^ do begin
|
|
if opcode = pc_ldo then
|
|
simple := true
|
|
else if opcode = pc_lod then
|
|
simple := LabelToDisp(r) + q < 256
|
|
else if opcode = pc_ldc then begin
|
|
simple := true;
|
|
zero := q = 0;
|
|
end; {else if}
|
|
end; {with}
|
|
end; {if}
|
|
if not (zero or simple) then begin
|
|
GenTree(op^.right);
|
|
GenImplied(m_pha);
|
|
end; {if}
|
|
GetPointer(op^.left);
|
|
if gLong.where = inPointer then begin
|
|
if short and simple then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if zero then
|
|
GenNative(m_lda_imm, immediate, 0, nil, 0)
|
|
else
|
|
LoadWord;
|
|
if gLong.fixedDisp then
|
|
GenNative(m_sta_indl, direct, gLong.disp, nil, 0)
|
|
else
|
|
GenNative(m_sta_indlY, direct, gLong.disp, nil, 0);
|
|
end {if}
|
|
else if gLong.where = localAddress then begin
|
|
if gLong.fixedDisp then begin
|
|
if short and simple then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if (gLong.disp & $FF00) = 0 then
|
|
if zero then
|
|
GenNative(m_stz_dir, direct, gLong.disp, nil, 0)
|
|
else begin
|
|
LoadWord;
|
|
GenNative(m_sta_dir, direct, gLong.disp, nil, 0);
|
|
end {else}
|
|
else begin
|
|
if zero then begin
|
|
GenNative(m_ldx_imm, immediate, gLong.disp, nil, 0);
|
|
GenNative(m_stz_dirX, direct, 0, nil, 0);
|
|
end {if}
|
|
else begin
|
|
LoadWord;
|
|
GenNative(m_ldx_imm, immediate, gLong.disp, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
end; {else}
|
|
end {else}
|
|
end {if}
|
|
else begin
|
|
if (gLong.disp & $FF00) <> 0 then begin
|
|
GenImplied(m_txa);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, glong.disp, nil, 0);
|
|
GenImplied(m_tax);
|
|
gLong.disp := 0;
|
|
end; {if}
|
|
if short and simple then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if zero then
|
|
GenNative(m_stz_dirX, direct, gLong.disp, nil, 0)
|
|
else begin
|
|
LoadWord;
|
|
GenNative(m_sta_dirX, direct, gLong.disp, nil, 0);
|
|
end; {else}
|
|
end; {else}
|
|
end {else if}
|
|
else {if gLong.where = globalLabel then} begin
|
|
if short and simple then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if zero then begin
|
|
if not smallMemoryModel then
|
|
GenNative(m_lda_imm, immediate, 0, nil, 0);
|
|
end {if}
|
|
else
|
|
LoadWord;
|
|
if gLong.fixedDisp then
|
|
if smallMemoryModel then
|
|
if zero then
|
|
GenNative(m_stz_abs, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_sta_abs, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_sta_long, longAbs, gLong.disp, gLong.lab, 0)
|
|
else
|
|
if smallMemoryModel then
|
|
if zero then
|
|
GenNative(m_stz_absX, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_sta_absX, absolute, gLong.disp, gLong.lab, 0)
|
|
else
|
|
GenNative(m_sta_longX, longAbs, gLong.disp, gLong.lab, 0);
|
|
end; {else}
|
|
if short then begin
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
if opcode = pc_cpi then
|
|
GenNative(m_and_imm, immediate, $00FF, nil, 0);
|
|
end; {if}
|
|
end; {case cgByte,cgUByte,cgWord,cgUWord}
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {GenStoCpi}
|
|
|
|
|
|
procedure GenStrCop (op: icptr);
|
|
|
|
{ Generate code for a pc_str or pc_cop }
|
|
|
|
var
|
|
disp: integer; {store location}
|
|
optype: baseTypeEnum; {op^.optype}
|
|
special: boolean; {use special processing?}
|
|
zero: boolean; {is the operand a constant zero?}
|
|
|
|
begin {GenStrCop}
|
|
disp := LabelToDisp(op^.r) + op^.q;
|
|
optype := op^.optype;
|
|
case optype of
|
|
cgByte, cgUByte, cgWord, cgUWord: begin
|
|
zero := false;
|
|
if op^.left^.opcode = pc_ldc then
|
|
if op^.opcode = pc_str then
|
|
if op^.left^.q = 0 then
|
|
zero := true;
|
|
if not zero then begin
|
|
if optype in [cgByte,cgUByte] then begin
|
|
if op^.opcode = pc_str then
|
|
if op^.left^.opcode = pc_cnv then
|
|
if (op^.left^.q >> 4) in [ord(cgWord),ord(cgUWord)] then
|
|
op^.left := op^.left^.left;
|
|
if (op^.left^.opcode in [pc_ldc,pc_ldc,pc_lod])
|
|
and (op^.opcode = pc_str) then begin
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
GenTree(op^.left);
|
|
end {if}
|
|
else begin
|
|
GenTree(op^.left);
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
end; {else}
|
|
end {if}
|
|
else
|
|
GenTree(op^.left);
|
|
end {if}
|
|
else
|
|
if optype in [cgByte,cgUByte] then
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
if disp > 255 then begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
if zero then
|
|
GenNative(m_stz_dirx, direct, 0, nil, 0)
|
|
else
|
|
GenNative(m_sta_dirx, direct, 0, nil, 0);
|
|
end {if}
|
|
else
|
|
if zero then
|
|
GenNative(m_stz_dir, direct, disp, nil, 0)
|
|
else
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
if optype in [cgByte,cgUByte] then
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
end;
|
|
|
|
cgReal, cgDouble, cgComp, cgExtended: begin
|
|
GenTree(op^.left);
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, disp, nil, 0);
|
|
GenImplied(m_pha);
|
|
if op^.opcode = pc_str then begin
|
|
if optype = cgReal then
|
|
GenCall(9)
|
|
else if optype = cgDouble then
|
|
GenCall(10)
|
|
else if optype = cgComp then
|
|
GenCall(66)
|
|
else {if optype = cgExtended then}
|
|
GenCall(67);
|
|
end {if}
|
|
else begin
|
|
if optype = cgReal then
|
|
GenCall(51)
|
|
else if optype = cgDouble then
|
|
GenCall(52)
|
|
else if optype = cgComp then
|
|
GenCall(68)
|
|
else {if optype = cgExtended then}
|
|
GenCall(69);
|
|
end; {else}
|
|
end;
|
|
|
|
cgLong, cgULong: begin
|
|
if (op^.opcode = pc_str) and (op^.left^.opcode in [pc_adl,pc_sbl]) then
|
|
GenAdlSbl(op^.left, op)
|
|
else if (op^.opcode = pc_str) and (op^.left^.opcode in [pc_inc,pc_dec]) then
|
|
GenIncDec(op^.left, op)
|
|
else begin
|
|
if op^.opcode = pc_str then
|
|
gLong.preference :=
|
|
A_X+onStack+inPointer+localAddress+globalLabel+constant
|
|
else
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
case gLong.where of
|
|
|
|
A_X:
|
|
if disp < 254 then begin
|
|
GenNative(m_stx_dir, direct, disp+2, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
end {else if}
|
|
else begin
|
|
GenImplied(m_txy);
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
GenNative(m_sty_dirX, direct, 2, nil, 0);
|
|
if op^.opcode = pc_cop then
|
|
GenImplied(m_tyx);
|
|
end; {else}
|
|
|
|
onStack:
|
|
if disp < 254 then begin
|
|
if op^.opcode = pc_str then
|
|
GenImplied(m_pla)
|
|
else {if op^.opcode = pc_cop then}
|
|
GenNative(m_lda_s, direct, 1, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
if op^.opcode = pc_str then
|
|
GenImplied(m_pla)
|
|
else {if op^.opcode = pc_cop then}
|
|
GenNative(m_lda_s, direct, 3, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp+2, nil, 0);
|
|
end {else if}
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
if op^.opcode = pc_str then
|
|
GenImplied(m_pla)
|
|
else {if op^.opcode = pc_cop then}
|
|
GenNative(m_lda_s, direct, 1, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
if op^.opcode = pc_str then
|
|
GenImplied(m_pla)
|
|
else {if op^.opcode = pc_cop then}
|
|
GenNative(m_lda_s, direct, 3, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 2, nil, 0);
|
|
end; {else}
|
|
|
|
inPointer: begin
|
|
if (disp < 254) and (gLong.disp < 254) and gLong.fixedDisp
|
|
and (disp >= 0) and (gLong.disp >= 0) then begin
|
|
GenNative(m_lda_dir, direct, gLong.disp, nil, 0);
|
|
GenNative(m_ldx_dir, direct, gLong.disp+2, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
GenNative(m_stx_dir, direct, disp+2, nil, 0);
|
|
end {if}
|
|
else if (disp < 254) and (gLong.disp < 254)
|
|
and (disp >= 0) and (gLong.disp >= 0)
|
|
and (op^.opcode = pc_str) then begin
|
|
GenImplied(m_tya);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_dir, direct, gLong.disp, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
GenNative(m_lda_dir, direct, gLong.disp+2, nil, 0);
|
|
GenNative(m_adc_imm, immediate, 0, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp+2, nil, 0);
|
|
end {else if}
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
if not gLong.fixedDisp then begin
|
|
GenImplied(m_tya);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_dir, direct, gLong.disp, nil, 0);
|
|
end {if}
|
|
else
|
|
GenNative(m_lda_dir, direct, gLong.disp, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
GenNative(m_lda_dir, direct, gLong.disp+2, nil, 0);
|
|
if not gLong.fixedDisp then
|
|
GenNative(m_adc_imm, immediate, 0, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 2, nil, 0);
|
|
end; {else}
|
|
end;
|
|
|
|
localAddress:
|
|
if disp < 254 then begin
|
|
GenNative(m_stz_dir, direct, disp+2, nil, 0);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
if not gLong.fixedDisp then begin
|
|
GenImplied(m_phx);
|
|
GenNative(m_adc_s, direct, 1, nil, 0);
|
|
GenImplied(m_plx);
|
|
end; {if}
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
end {else if disp < 254}
|
|
else begin
|
|
if not gLong.fixedDisp then
|
|
GenImplied(m_phx);
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, nil, 0);
|
|
if not gLong.fixedDisp then begin
|
|
GenNative(m_adc_s, direct, 1, nil, 0);
|
|
GenImplied(m_ply);
|
|
end; {if}
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
GenNative(m_stz_dirX, direct, 2, nil, 0);
|
|
end; {else}
|
|
|
|
globalLabel: begin
|
|
if not gLong.fixedDisp then
|
|
GenImplied(m_txa)
|
|
else if disp > 253 then
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
if gLong.fixedDisp then
|
|
GenNative(m_lda_imm, immediate, gLong.disp, gLong.lab, 0)
|
|
else begin
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, gLong.disp, gLong.lab, 0);
|
|
end; {else}
|
|
if disp < 254 then
|
|
GenNative(m_sta_dir, direct, disp, nil, 0)
|
|
else
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
GenNative(m_lda_imm, immediate, gLong.disp, gLong.lab, shift16);
|
|
if not gLong.fixedDisp then
|
|
GenNative(m_adc_imm, immediate, 0, nil, 0);
|
|
if disp < 254 then
|
|
GenNative(m_sta_dir, direct, disp+2, nil, 0)
|
|
else
|
|
GenNative(m_sta_dirX, direct, 2, nil, 0);
|
|
end;
|
|
|
|
constant:
|
|
if disp < 254 then begin
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).lsw, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp, nil, 0);
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).msw, nil, 0);
|
|
GenNative(m_sta_dir, direct, disp+2, nil, 0);
|
|
end {else}
|
|
else begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).lsw, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 0, nil, 0);
|
|
GenNative(m_lda_imm, immediate, long(gLong.lval).msw, nil, 0);
|
|
GenNative(m_sta_dirX, direct, 2, nil, 0);
|
|
end; {else}
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {else}
|
|
end;
|
|
|
|
otherwise: ;
|
|
|
|
end; {case}
|
|
end; {GenStrCop}
|
|
|
|
|
|
procedure GenUnaryLong (op: icptr);
|
|
|
|
{ generate a pc_bnl or pc_ngl }
|
|
|
|
begin {GenUnaryLong}
|
|
gLong.preference := onStack; {get the operand}
|
|
GenTree(op^.left);
|
|
case op^.opcode of {do the operation}
|
|
|
|
pc_bnl: begin
|
|
GenNative(m_lda_s, direct, 1, nil, 0);
|
|
GenNative(m_eor_imm, immediate, $FFFF, nil, 0);
|
|
GenNative(m_sta_s, direct, 1, nil, 0);
|
|
GenNative(m_lda_s, direct, 3, nil, 0);
|
|
GenNative(m_eor_imm, immediate, $FFFF, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
end; {case pc_bnl}
|
|
|
|
pc_ngl: begin
|
|
GenImplied(m_sec);
|
|
GenNative(m_lda_imm, immediate, 0, nil, 0);
|
|
GenNative(m_sbc_s, direct, 1, nil, 0);
|
|
GenNative(m_sta_s, direct, 1, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 0, nil, 0);
|
|
GenNative(m_sbc_s, direct, 3, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
end; {case pc_ngl}
|
|
end; {case}
|
|
gLong.where := onStack; {the result is on the stack}
|
|
end; {GenUnaryLong}
|
|
|
|
|
|
procedure GenTree {op: icptr};
|
|
|
|
{ generate code for op and its children }
|
|
{ }
|
|
{ parameters: }
|
|
{ op - opcode for which to generate code }
|
|
|
|
|
|
procedure GenAdi (op: icptr);
|
|
|
|
{ generate a pc_adi }
|
|
|
|
var
|
|
nd: icptr;
|
|
|
|
begin {GenAdi}
|
|
if not Complex(op^.left) then
|
|
if Complex(op^.right) then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
GenTree(op^.left);
|
|
if Complex(op^.right) then begin
|
|
GenImplied(m_pha);
|
|
GenTree(op^.right);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_s, direct, 1, nil, 0);
|
|
GenImplied(m_plx);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_clc);
|
|
OperA(m_adc_imm, op^.right);
|
|
end; {else}
|
|
end; {GenAdi}
|
|
|
|
|
|
procedure GenBinLong (op: icptr);
|
|
|
|
{ generate one of: pc_blr, pc_blx, pc_bal, pc_dvl, pc_mdl, }
|
|
{ pc_mpl, pc_sll, pc_slr, pc_udl, pc_ulm, pc_uml, pc_vsr }
|
|
|
|
var
|
|
nd: icptr; {for swapping left/right children}
|
|
|
|
|
|
procedure GenOp (ops, opi: integer);
|
|
|
|
{ generate a binary operation }
|
|
{ }
|
|
{ parameters: }
|
|
{ ops - stack version of operation }
|
|
{ opi - immediate version of operation }
|
|
|
|
var
|
|
lab1: integer; {label number}
|
|
|
|
begin {GenOp}
|
|
GenImplied(m_pla);
|
|
if gLong.where = constant then begin
|
|
GenNative(opi, immediate, long(gLong.lval).lsw, nil, 0);
|
|
GenImplied(m_pha);
|
|
GenNative(m_lda_s, direct, 3, nil, 0);
|
|
GenNative(opi, immediate, long(gLong.lval).msw, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(ops, direct, 3, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
GenImplied(m_pla);
|
|
GenNative(ops, direct, 3, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
end; {else}
|
|
end; {GenOp}
|
|
|
|
|
|
begin {GenBinLong}
|
|
if (op^.left^.opcode = pc_ldc) and
|
|
(op^.opcode in [pc_blr,pc_blx,pc_bal]) then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
if op^.opcode in [pc_blr,pc_blx,pc_bal] then begin
|
|
gLong.preference := constant;
|
|
GenTree(op^.right);
|
|
end {if}
|
|
else if op^.opcode in [pc_uml,pc_udl,pc_ulm] then begin
|
|
gLong.preference := A_X;
|
|
GenTree(op^.right);
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_plx);
|
|
end; {if}
|
|
end {else if}
|
|
else begin
|
|
gLong.preference := onStack;
|
|
GenTree(op^.right);
|
|
end; {else}
|
|
case op^.opcode of
|
|
|
|
pc_blr: GenOp(m_ora_s, m_ora_imm);
|
|
|
|
pc_blx: GenOp(m_eor_s, m_eor_imm);
|
|
|
|
pc_bal: GenOp(m_and_s, m_and_imm);
|
|
|
|
pc_dvl: GenCall(43);
|
|
|
|
pc_mdl: begin
|
|
GenCall(44);
|
|
GenImplied(m_ply);
|
|
GenImplied(m_ply);
|
|
end;
|
|
|
|
pc_mpl: GenCall(42);
|
|
|
|
pc_sll: GenCall(45);
|
|
|
|
pc_slr: GenCall(47);
|
|
|
|
pc_udl: GenCall(49);
|
|
|
|
pc_ulm: GenCall(50);
|
|
|
|
pc_uml: GenCall(48);
|
|
|
|
pc_vsr: GenCall(46);
|
|
|
|
otherwise: Error(cge1);
|
|
end; {case}
|
|
gLong.where := onStack;
|
|
end; {GenBinLong}
|
|
|
|
|
|
procedure GenBno (op: icptr);
|
|
|
|
{ Generate code for a pc_bno }
|
|
|
|
var
|
|
lLong: longType; {requested address type}
|
|
|
|
begin {GenBno}
|
|
lLong := gLong;
|
|
GenTree(op^.left);
|
|
gLong := lLong;
|
|
GenTree(op^.right);
|
|
end; {GenBno}
|
|
|
|
|
|
procedure GenBntNgiNot (op: icptr);
|
|
|
|
{ Generate code for a pc_bnt, pc_ngi or pc_not }
|
|
|
|
var
|
|
lab1: integer;
|
|
|
|
begin {GenntNgiNot}
|
|
GenTree(op^.left);
|
|
case op^.opcode of
|
|
pc_bnt:
|
|
GenNative(m_eor_imm, immediate, -1, nil, 0);
|
|
|
|
pc_ngi: begin
|
|
GenNative(m_eor_imm, immediate, -1, nil, 0);
|
|
GenImplied(m_ina);
|
|
end; {case pc_ngi}
|
|
|
|
pc_not: begin
|
|
lab1 := GenLabel;
|
|
GenImplied(m_tax);
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 1, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_eor_imm, immediate, 1, nil, 0);
|
|
end; {if}
|
|
end; {case}
|
|
end; {GenBntNgiNot}
|
|
|
|
|
|
procedure GenCui (op: icptr);
|
|
|
|
{ Generate code for a pc_cui }
|
|
|
|
var
|
|
lab1: integer; {return point}
|
|
lLong: longType; {used to reserve gLong}
|
|
|
|
begin {GenCup}
|
|
{save the stack register}
|
|
if saveStack or checkStack or (op^.q <> 0) then begin
|
|
GenNative(m_ldx_dir, direct, stackLoc, nil, 0);
|
|
GenImplied(m_phx);
|
|
GenImplied(m_tsx);
|
|
GenNative(m_stx_dir, direct, stackLoc, nil, 0);
|
|
end; {if}
|
|
|
|
{generate parameters}
|
|
{place the operands on the stack}
|
|
lLong := gLong;
|
|
GenTree(op^.left);
|
|
|
|
{get the address to call}
|
|
gLong.preference := onStack;
|
|
GenTree(op^.right);
|
|
gLong := lLong;
|
|
|
|
{create a return label}
|
|
lab1 := GenLabel;
|
|
|
|
{place the call/return addrs on stack}
|
|
GenNative(m_lda_s, direct, 1, nil, 0);
|
|
GenImplied(m_dea);
|
|
GenImplied(m_pha);
|
|
GenNative(m_sep, immediate, 32, nil, 0);
|
|
GenNative(m_lda_s, direct, 5, nil, 0);
|
|
GenNative(m_sta_s, direct, 3, nil, 0);
|
|
GenNative(m_lda_imm, genAddress, lab1, nil, shift16);
|
|
GenNative(m_sta_s, direct, 6, nil, 0);
|
|
GenNative(m_rep, immediate, 32, nil, 0);
|
|
GenNative(m_lda_imm, genAddress, lab1, nil, 0);
|
|
GenNative(m_sta_s, direct, 4, nil, 0);
|
|
|
|
{indirect call}
|
|
GenImplied(m_rtl);
|
|
GenLab(lab1);
|
|
|
|
if checkStack then begin
|
|
{check the stack for errors}
|
|
GenNative(m_ldy_dir, direct, stackLoc, nil, 0);
|
|
GenCall(76);
|
|
GenImplied(m_ply);
|
|
GenNative(m_sty_dir, direct, stackLoc, nil, 0);
|
|
end {if}
|
|
else if saveStack or (op^.q <> 0) then begin
|
|
GenImplied(m_txy);
|
|
GenNative(m_ldx_dir, direct, stackLoc, nil, 0);
|
|
GenImplied(m_txs);
|
|
GenImplied(m_tyx);
|
|
GenImplied(m_ply);
|
|
GenNative(m_sty_dir, direct, stackLoc, nil, 0);
|
|
end; {else}
|
|
|
|
{save the returned value}
|
|
gLong.where := A_X;
|
|
SaveRetValue(op^.optype);
|
|
end; {GenCui}
|
|
|
|
|
|
procedure GenCup (op: icptr);
|
|
|
|
{ Generate code for a pc_cup }
|
|
|
|
var
|
|
lLong: longType; {used to reserve gLong}
|
|
|
|
begin {GenCup}
|
|
{save the stack register}
|
|
if saveStack or checkStack or (op^.q <> 0) then begin
|
|
GenNative(m_ldx_dir, direct, stackLoc, nil, 0);
|
|
GenImplied(m_phx);
|
|
GenImplied(m_tsx);
|
|
GenNative(m_stx_dir, direct, stackLoc, nil, 0);
|
|
end; {if}
|
|
|
|
{generate parameters}
|
|
lLong := gLong;
|
|
GenTree(op^.left);
|
|
gLong := lLong;
|
|
|
|
{generate the jsl}
|
|
GenNative(m_jsl, longAbs, 0, op^.lab, 0);
|
|
|
|
{check the stack for errors}
|
|
if checkStack then begin
|
|
GenNative(m_ldy_dir, direct, stackLoc, nil, 0);
|
|
GenCall(76);
|
|
GenImplied(m_ply);
|
|
GenNative(m_sty_dir, direct, stackLoc, nil, 0);
|
|
GenImplied(m_tay);
|
|
end {if}
|
|
else if saveStack or (op^.q <> 0) then begin
|
|
GenImplied(m_tay);
|
|
GenNative(m_lda_dir, direct, stackLoc, nil, 0);
|
|
GenImplied(m_tcs);
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dir, direct, stackLoc, nil, 0);
|
|
GenImplied(m_tya);
|
|
end; {else}
|
|
|
|
{save the returned value}
|
|
gLong.where := A_X;
|
|
SaveRetValue(op^.optype);
|
|
end; {GenCup}
|
|
|
|
|
|
procedure GenDviMod (op: icptr);
|
|
|
|
{ Generate code for a pc_dvi, pc_mod, pc_udi or pc_uim }
|
|
|
|
var
|
|
opcode: pcodes; {temp storage}
|
|
|
|
begin {GenDviMod}
|
|
if Complex(op^.right) then begin
|
|
GenTree(op^.right);
|
|
if Complex(op^.left) then begin
|
|
GenImplied(m_pha);
|
|
GenTree(op^.left);
|
|
GenImplied(m_plx);
|
|
end {if}
|
|
else begin
|
|
GenImplied(m_tax);
|
|
GenTree(op^.left);
|
|
end; {else}
|
|
end {if}
|
|
else begin
|
|
GenTree(op^.left);
|
|
LoadX(op^.right);
|
|
end; {else}
|
|
opcode := op^.opcode;
|
|
if opcode = pc_mod then
|
|
GenCall(27)
|
|
else if opcode = pc_dvi then
|
|
GenCall(26)
|
|
else {if opcode in [pc_udi,pc_uim] then} begin
|
|
GenCall(40);
|
|
if opcode = pc_uim then
|
|
GenImplied(m_txa);
|
|
end; {else}
|
|
if rangeCheck then
|
|
GenCall(25);
|
|
end; {GenDviMod}
|
|
|
|
|
|
procedure GenEnt;
|
|
|
|
{ Generate code for a pc_ent }
|
|
|
|
begin {GenEnt}
|
|
if rangeCheck then begin {if range checking is on, check for a stack overflow}
|
|
GenNative(m_pea, immediate, localSize - returnSize - 1, nil, 0);
|
|
GenCall(1);
|
|
end; {if}
|
|
|
|
if localSize = 0 then begin {create the stack frame}
|
|
if parameterSize <> 0 then begin
|
|
GenImplied(m_tsc);
|
|
GenImplied(m_phd);
|
|
GenImplied(m_tcd);
|
|
end; {if}
|
|
end {if}
|
|
else if localSize = 2 then begin
|
|
GenImplied(m_pha);
|
|
GenImplied(m_tsc);
|
|
GenImplied(m_phd);
|
|
GenImplied(m_tcd);
|
|
end {else if}
|
|
else begin
|
|
GenImplied(m_tsc);
|
|
GenImplied(m_sec);
|
|
GenNative(m_sbc_imm, immediate, localSize, nil, 0);
|
|
GenImplied(m_tcs);
|
|
GenImplied(m_phd);
|
|
GenImplied(m_tcd);
|
|
end; {if}
|
|
|
|
if dataBank then begin {preserve and set data bank}
|
|
GenImplied(m_phb);
|
|
GenImplied(m_phb);
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dir, direct, bankLoc, nil, 0);
|
|
GenNative(m_pea, immediate, 0, @'~GLOBALS', shift8);
|
|
GenImplied(m_plb);
|
|
GenImplied(m_plb);
|
|
end; {if}
|
|
|
|
{no pc_nam (yet)}
|
|
namePushed := false;
|
|
end; {GenEnt}
|
|
|
|
|
|
procedure GenFjpTjp (op: icptr);
|
|
|
|
{ Generate code for a pc_fjp or pc_tjp }
|
|
|
|
var
|
|
lab1: integer; {branch point}
|
|
opcode: pcodes; {op^.left^.opcode}
|
|
|
|
begin {GenFjpTjp}
|
|
if op^.left^.opcode in [pc_equ,pc_geq,pc_grt,pc_les,pc_leq,pc_neq] then
|
|
if op^.left^.opcode in [pc_equ,pc_neq] then
|
|
GenEquNeq(op^.left, op^.opcode, op^.q)
|
|
else
|
|
GenCmp(op^.left, op^.opcode, op^.q)
|
|
else begin
|
|
lab1 := GenLabel;
|
|
GenTree(op^.left);
|
|
opcode := op^.left^.opcode;
|
|
if NeedsCondition(opcode) then
|
|
GenImplied(m_tax)
|
|
else if opcode = pc_ind then
|
|
if op^.left^.optype in [cgByte,cgUByte] then
|
|
GenImplied(m_tax);
|
|
if op^.opcode = pc_fjp then
|
|
GenNative(m_bne, relative, lab1, nil, 0)
|
|
else {if op^.opcode = pc_tjp then}
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, op^.q, nil, 0);
|
|
GenLab(lab1);
|
|
end; {else}
|
|
end; {GenFjpTjp}
|
|
|
|
|
|
procedure GenLaoLad (op: icptr);
|
|
|
|
{ Generate code for a pc_lao, pc_lad }
|
|
|
|
var
|
|
q: integer; {displacement}
|
|
|
|
begin {GenLaoLad}
|
|
if op^.opcode = pc_lad then
|
|
q := 0
|
|
else
|
|
q := op^.q;
|
|
if (globalLabel & gLong.preference) <> 0 then begin
|
|
gLong.fixedDisp := true;
|
|
gLong.where := globalLabel;
|
|
gLong.disp := q;
|
|
gLong.lab := op^.lab;
|
|
end {if}
|
|
else if (A_X & gLong.preference) <> 0 then begin
|
|
gLong.where := A_X;
|
|
GenNative(m_ldx_imm, immediate, q, op^.lab, shift16);
|
|
GenNative(m_lda_imm, immediate, q, op^.lab, 0);
|
|
end {else if}
|
|
else begin
|
|
gLong.where := onStack;
|
|
GenNative(m_pea, immediate, q, op^.lab, shift16);
|
|
GenNative(m_pea, immediate, q, op^.lab, 0);
|
|
end; {else}
|
|
end; {GenLaoLad}
|
|
|
|
|
|
procedure GenLbfLbu (op: icptr);
|
|
|
|
{ Generate code for a pc_lbf or pc_lbu }
|
|
|
|
var
|
|
lLong: longType; {requested address type}
|
|
|
|
begin {GenLbfLbu}
|
|
lLong := gLong;
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
GenNative(m_pea, immediate, op^.r, nil, 0);
|
|
GenNative(m_pea, immediate, op^.q, nil, 0);
|
|
if op^.opcode = pc_lbf then
|
|
GenCall(73)
|
|
else
|
|
GenCall(72);
|
|
if op^.optype in [cgLong,cgULong] then begin
|
|
if (A_X & lLong.preference) <> 0 then
|
|
gLong.where := A_X
|
|
else begin
|
|
gLong.where := onStack;
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
end; {if}
|
|
end; {GenLbfLbu}
|
|
|
|
|
|
procedure GenLca (op: icptr);
|
|
|
|
{ Generate code for a pc_lca }
|
|
|
|
var
|
|
i: integer; {loop/index variable}
|
|
|
|
begin {GenLca}
|
|
gLong.where := onStack;
|
|
GenNative(m_pea, immediate, stringSize, nil, stringReference+shift16);
|
|
GenNative(m_pea, immediate, stringSize, nil, stringReference);
|
|
if maxString-stringSize >= op^.q+1 then begin
|
|
for i := 1 to op^.q do
|
|
stringSpace[i+stringSize] := op^.str^.str[i];
|
|
stringSpace[stringSize+op^.q+1] := chr(0);
|
|
stringSize := stringSize+op^.q+1;
|
|
end
|
|
else
|
|
Error(cge3);
|
|
op^.optype := cgULong;
|
|
end; {GenLca}
|
|
|
|
|
|
procedure GenLda (op: icptr);
|
|
|
|
{ Generate code for a pc_lda }
|
|
|
|
begin {GenLda}
|
|
if (localAddress & gLong.preference) <> 0 then begin
|
|
gLong.fixedDisp := true;
|
|
gLong.where := localAddress;
|
|
gLong.disp := LabelToDisp(op^.r) + op^.q;
|
|
end {if}
|
|
else if (A_X & gLong.preference) <> 0 then begin
|
|
gLong.where := A_X;
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, LabelToDisp(op^.r) + op^.q, nil, 0);
|
|
GenNative(m_ldx_imm, immediate, 0, nil, 0);
|
|
end {else if}
|
|
else begin
|
|
gLong.where := onStack;
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, LabelToDisp(op^.r) + op^.q, nil, 0);
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
end; {GenLda}
|
|
|
|
|
|
procedure GenLdc (op: icptr);
|
|
|
|
{ Generate code for a pc_ldc }
|
|
|
|
type
|
|
kind = (vint, vbyte, vreal); {kinds of equivalenced data}
|
|
|
|
var
|
|
i: integer; {loop/index variable}
|
|
rec: realrec; {conversion record}
|
|
switch: packed record {used for type conversion}
|
|
case rkind: kind of
|
|
vint: (i: integer);
|
|
vbyte: (b1, b2, b3, b4, b5, b6, b7, b8: byte);
|
|
vreal: (r: double);
|
|
end;
|
|
|
|
begin {GenLdc}
|
|
case op^.optype of
|
|
cgByte: begin
|
|
if op^.q > 127 then
|
|
op^.q := op^.q | $FF00;
|
|
GenNative(m_lda_imm, immediate, op^.q, nil, 0);
|
|
end;
|
|
|
|
cgUByte, cgWord, cgUWord:
|
|
GenNative(m_lda_imm, immediate, op^.q, nil, 0);
|
|
|
|
cgReal, cgDouble, cgComp, cgExtended: begin
|
|
rec.itsReal := op^.rval;
|
|
CnvSX(rec);
|
|
i := 9;
|
|
while i >= 0 do begin
|
|
switch.b1 := rec.inSANE[i];
|
|
switch.b2 := rec.inSANE[i+1];
|
|
GenNative(m_pea, immediate, switch.i, nil, 0);
|
|
i := i-2;
|
|
end; {while}
|
|
end;
|
|
|
|
cgLong, cgULong:
|
|
if (constant & gLong.preference) <> 0 then begin
|
|
gLong.where := constant;
|
|
gLong.lval := op^.lval;
|
|
end
|
|
else if (A_X & gLong.preference) <> 0 then begin
|
|
gLong.where := A_X;
|
|
GenNative(m_lda_imm, immediate, long(op^.lval).lsw, nil, 0);
|
|
GenNative(m_ldx_imm, immediate, long(op^.lval).msw, nil, 0);
|
|
end
|
|
else begin
|
|
gLong.where := onStack;
|
|
GenNative(m_pea, immediate, long(op^.lval).msw, nil, 0);
|
|
GenNative(m_pea, immediate, long(op^.lval).lsw, nil, 0);
|
|
end;
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {GenLdc}
|
|
|
|
|
|
procedure GenLdo (op: icptr);
|
|
|
|
{ Generate code for a pc_ldo }
|
|
|
|
var
|
|
lab1: integer; {branch point}
|
|
|
|
begin {GenLdo}
|
|
case op^.optype of
|
|
cgWord, cgUWord:
|
|
if smallMemoryModel then
|
|
GenNative(m_lda_abs, absolute, op^.q, op^.lab, 0)
|
|
else
|
|
GenNative(m_lda_long, longAbs, op^.q, op^.lab, 0);
|
|
|
|
cgByte, cgUByte: begin
|
|
if smallMemoryModel then
|
|
GenNative(m_lda_abs, absolute, op^.q, op^.lab, 0)
|
|
else
|
|
GenNative(m_lda_long, longAbs, op^.q, op^.lab, 0);
|
|
GenNative(m_and_imm, immediate, 255, nil, 0);
|
|
if op^.optype = cgByte then begin
|
|
GenNative(m_bit_imm, immediate, $0080, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_ora_imm, immediate, $FF00, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_cmp_imm, immediate, $0000, nil, 0);
|
|
end; {if}
|
|
end;
|
|
|
|
cgReal, cgDouble, cgComp, cgExtended: begin
|
|
GenNative(m_pea, immediate, op^.q, op^.lab, shift16);
|
|
GenNative(m_pea, immediate, op^.q, op^.lab, 0);
|
|
if op^.optype = cgReal then
|
|
GenCall(21)
|
|
else if op^.optype = cgDouble then
|
|
GenCall(22)
|
|
else if op^.optype = cgComp then
|
|
GenCall(70)
|
|
else {if op^.optype = cgExtended then}
|
|
GenCall(71);
|
|
end;
|
|
|
|
cgLong, cgULong: begin
|
|
if (A_X & gLong.preference) <> 0 then
|
|
gLong.where := A_X
|
|
else
|
|
gLong.where := onStack;
|
|
if smallMemoryModel then begin
|
|
GenNative(m_ldx_abs, absolute, op^.q+2, op^.lab, 0);
|
|
GenNative(m_lda_abs, absolute, op^.q, op^.lab, 0);
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_phx);
|
|
GenImplied(m_pha);
|
|
end; {if}
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_long, longabsolute, op^.q+2, op^.lab, 0);
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pha)
|
|
else
|
|
GenImplied(m_tax);
|
|
GenNative(m_lda_long, longabsolute, op^.q, op^.lab, 0);
|
|
if gLong.where = onStack then
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
end; {case cgLong,cgULong}
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
end; {GenLdo}
|
|
|
|
|
|
procedure GenLnm (op: icptr);
|
|
|
|
{ Generate code for a pc_lnm }
|
|
|
|
begin {GenLnm}
|
|
if op^.left <> nil then
|
|
GenTree(op^.left);
|
|
if traceBack then begin
|
|
GenNative(m_pea, immediate, op^.r, nil, 0);
|
|
GenCall(6);
|
|
end; {if}
|
|
if debugFlag then begin
|
|
GenNative(m_cop, immediate, op^.q, nil, 0);
|
|
GenNative(d_wrd, special, op^.r, nil, 0);
|
|
end; {if}
|
|
end; {GenLnm}
|
|
|
|
|
|
procedure GenLod (op: icptr);
|
|
|
|
{ Generate code for a pc_lod }
|
|
|
|
var
|
|
disp: integer; {load location}
|
|
lab1: integer; {branch point}
|
|
optype: baseTypeEnum; {op^.optype}
|
|
|
|
begin {GenLod}
|
|
disp := LabelToDisp(op^.r) + op^.q;
|
|
optype := op^.optype;
|
|
case optype of
|
|
cgReal, cgDouble, cgComp, cgExtended: begin
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, disp, nil, 0);
|
|
GenImplied(m_pha);
|
|
if optype = cgReal then
|
|
GenCall(21)
|
|
else if optype = cgDouble then
|
|
GenCall(22)
|
|
else if optype = cgComp then
|
|
GenCall(70)
|
|
else {if optype = cgExtended then}
|
|
GenCall(71);
|
|
end;
|
|
|
|
cgLong, cgULong: begin
|
|
if ((inPointer & gLong.preference) <> 0) and (disp < 254) then
|
|
begin
|
|
gLong.where := inPointer;
|
|
gLong.fixedDisp := true;
|
|
gLong.disp := disp;
|
|
end {if}
|
|
else if ((A_X & gLong.preference) <> 0) and (disp < 254) then begin
|
|
gLong.where := A_X;
|
|
GenNative(m_ldx_dir, direct, disp+2, nil, 0);
|
|
GenNative(m_lda_dir, direct, disp, nil, 0);
|
|
end {else if}
|
|
else begin
|
|
gLong.where := onStack;
|
|
if disp >= 254 then begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
GenNative(m_lda_dirx, direct, 2, nil, 0);
|
|
GenImplied(m_pha);
|
|
GenNative(m_lda_dirx, direct, 0, nil, 0);
|
|
GenImplied(m_pha);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_pei_dir, direct, disp+2, nil, 0);
|
|
GenNative(m_pei_dir, direct, disp, nil, 0);
|
|
end; {else}
|
|
end; {else}
|
|
end;
|
|
|
|
cgByte, cgUByte, cgWord, cgUWord: begin
|
|
if disp >= 256 then begin
|
|
GenNative(m_ldx_imm, immediate, disp, nil, 0);
|
|
GenNative(m_lda_dirx, direct, 0, nil, 0);
|
|
end
|
|
else
|
|
GenNative(m_lda_dir, direct, disp, nil, 0);
|
|
if optype in [cgByte,cgUByte] then begin
|
|
GenNative(m_and_imm, immediate, $00FF, nil, 0);
|
|
if optype = cgByte then begin
|
|
GenNative(m_bit_imm, immediate, $0080, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_ora_imm, immediate, $FF00, nil, 0);
|
|
GenLab(lab1);
|
|
GenNative(m_cmp_imm, immediate, $0000, nil, 0);
|
|
end; {if}
|
|
end;
|
|
end;
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
|
|
end; {case}
|
|
end; {GenLod}
|
|
|
|
|
|
procedure GenLorLnd (op: icptr);
|
|
|
|
{ Generate code for a pc_lor or pc_lnd }
|
|
|
|
var
|
|
lab1,lab2: integer; {label}
|
|
nd: icptr; {temp node pointer}
|
|
opc: pcodes; {operation code}
|
|
|
|
|
|
procedure DoOra;
|
|
|
|
{ do some common oring operations to reduce space }
|
|
|
|
begin {DoOra}
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenNative(m_sta_dir, direct, dworkLoc, nil, 0);
|
|
GenImplied(m_pla);
|
|
end {if}
|
|
else
|
|
GenNative(m_stx_dir, direct, dworkLoc, nil, 0);
|
|
GenNative(m_ora_dir, direct, dworkLoc, nil, 0);
|
|
end; {DoOra}
|
|
|
|
|
|
begin {GenLorLnd}
|
|
opc := op^.opcode;
|
|
lab1 := GenLabel;
|
|
gLong.preference := A_X;
|
|
GenTree(op^.left);
|
|
DoOra;
|
|
|
|
lab2 := GenLabel;
|
|
if opc = pc_lnd then
|
|
GenNative(m_bne, relative, lab2, nil, 0)
|
|
else begin
|
|
GenNative(m_beq, relative, lab2, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 1, nil, 0);
|
|
end; {else}
|
|
GenNative(m_brl, longrelative, lab1, nil, 0);
|
|
GenLab(lab2);
|
|
|
|
gLong.preference := A_X;
|
|
GenTree(op^.right);
|
|
DoOra;
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_lda_imm, immediate, 1, nil, 0);
|
|
GenLab(lab1);
|
|
end; {GenLorLnd}
|
|
|
|
|
|
procedure GenMov (op: icptr; duplicate: boolean);
|
|
|
|
{ Generate code for a pc_mov }
|
|
{ }
|
|
{ parameters: }
|
|
{ op - pc_mov instruction }
|
|
{ duplicate - should the source address be left on the }
|
|
{ stack? }
|
|
|
|
var
|
|
banks: integer; {number of banks to move}
|
|
|
|
|
|
procedure Load (opcode: integer; op: icptr);
|
|
|
|
{ generate a load immediate based on instruction type }
|
|
{ }
|
|
{ parameters: }
|
|
{ opcode - native code load operation }
|
|
{ op - node to load }
|
|
|
|
var
|
|
i: integer;
|
|
|
|
begin {Load}
|
|
if op^.opcode = pc_lao then
|
|
GenNative(opcode, immediate, op^.q, op^.lab, 0)
|
|
else begin
|
|
GenNative(opcode, immediate, stringsize, nil, StringReference);
|
|
if maxstring-stringsize >= op^.q then begin
|
|
for i := 1 to op^.q do
|
|
stringspace[i+stringsize] := op^.str^.str[i];
|
|
stringsize := stringsize + op^.q;
|
|
end {if}
|
|
else
|
|
Error(cge3);
|
|
end; {else}
|
|
end; {Load}
|
|
|
|
|
|
begin {GenMov}
|
|
{determine if the destination address must be left on the stack}
|
|
if smallMemoryModel
|
|
and (not duplicate)
|
|
and (op^.left^.opcode in [pc_lao,pc_lca])
|
|
and (op^.right^.opcode in [pc_lao,pc_lca]) then begin
|
|
|
|
{take advantage of any available short cuts}
|
|
Load(m_ldy_imm, op^.left);
|
|
Load(m_ldx_imm, op^.right);
|
|
GenNative(m_lda_imm, immediate, op^.q-1, nil, 0);
|
|
GenImplied(m_phb);
|
|
GenImplied(m_mvn);
|
|
with op^.left^ do
|
|
if opcode = pc_lao then
|
|
GenNative(d_bmov, immediate, q, lab, shift16)
|
|
else
|
|
GenNative(d_bmov, immediate, 0, nil, stringReference+shift16);
|
|
with op^.right^ do
|
|
if opcode = pc_lao then
|
|
GenNative(d_bmov, immediate, q, lab, shift16)
|
|
else
|
|
GenNative(d_bmov, immediate, 0, nil, stringReference+shift16);
|
|
GenImplied(m_plb);
|
|
end {if}
|
|
else begin
|
|
|
|
{no short cuts are available - do it the hard way}
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
gLong.preference := onStack;
|
|
GenTree(op^.right);
|
|
banks := op^.r;
|
|
if banks <> 0 then
|
|
GenNative(m_pea, immediate, banks, nil, 0);
|
|
GenNative(m_pea, immediate, op^.q, nil, 0);
|
|
if banks = 0 then begin
|
|
if duplicate then
|
|
GenCall(55)
|
|
else
|
|
GenCall(54);
|
|
end {if}
|
|
else
|
|
if duplicate then
|
|
GenCall(63)
|
|
else
|
|
GenCall(62);
|
|
end; {else}
|
|
end; {GenMov}
|
|
|
|
|
|
procedure GenMpi (op: icptr);
|
|
|
|
{ Generate code for a pc_mpi or pc_umi }
|
|
|
|
var
|
|
nd: icptr;
|
|
|
|
begin {GenMpi}
|
|
if not Complex(op^.left) then
|
|
if Complex(op^.right) then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
GenTree(op^.left);
|
|
if Complex(op^.right) then begin
|
|
GenImplied(m_pha);
|
|
GenTree(op^.right);
|
|
GenImplied(m_plx);
|
|
end {if}
|
|
else
|
|
LoadX(op^.right);
|
|
if op^.opcode = pc_mpi then
|
|
GenCall(28)
|
|
else {pc_umi}
|
|
GenCall(39);
|
|
if rangeCheck then
|
|
GenCall(25);
|
|
end; {GenMpi}
|
|
|
|
|
|
procedure GenNam (op: icptr);
|
|
|
|
{ Generate code for a pc_nam }
|
|
|
|
var
|
|
i: integer; {loop/index variable}
|
|
len: integer; {length of the file name}
|
|
|
|
|
|
function ToUpper (ch: char): char;
|
|
|
|
{ Return the uppercase equivalent of the input character }
|
|
|
|
begin {ToUpper}
|
|
if (ch >= 'a') and (ch <= 'z') then
|
|
ch := chr(ord(ch)-ord('a')+ord('A'));
|
|
ToUpper := ch;
|
|
end; {ToUpper}
|
|
|
|
|
|
begin {GenNam}
|
|
{generate a call to install the name in the traceback facility}
|
|
if traceBack then begin
|
|
GenNative(m_pea, immediate, stringSize, nil, stringReference+shift16);
|
|
GenNative(m_pea, immediate, stringSize, nil, stringReference);
|
|
GenCall(5);
|
|
namePushed := true;
|
|
end; {if}
|
|
|
|
{send the name to the profiler}
|
|
if profileFlag then begin
|
|
GenNative(m_cop, immediate, 3, nil, 0);
|
|
GenNative(d_add, genaddress, stringSize, nil, stringReference);
|
|
GenNative(d_add, genaddress, stringSize, nil, stringReference+shift16);
|
|
end; {if}
|
|
|
|
{place the name in the string buffer}
|
|
if maxString-stringSize >= op^.q+1 then begin
|
|
stringSpace[stringSize+1] := chr(op^.q);
|
|
for i := 1 to op^.q do
|
|
stringSpace[i+stringSize+1] := op^.str^.str[i];
|
|
stringSize := stringSize + op^.q + 1;
|
|
end {if}
|
|
else
|
|
Error(cge3);
|
|
|
|
{send the file name to the debugger}
|
|
if debugFlag then begin
|
|
GenNative(m_cop, immediate, 6, nil, 0);
|
|
GenNative(d_add, genaddress, stringSize, nil, stringReference);
|
|
GenNative(d_add, genaddress, stringSize, nil, stringReference+shift16);
|
|
len := sourceFileGS.theString.size;
|
|
if len > 255 then
|
|
len := 255;
|
|
if maxString-stringSize >= len+1 then begin
|
|
stringSpace[stringSize+1] := chr(len);
|
|
for i := 1 to len do
|
|
stringSpace[i+stringSize+1] :=
|
|
ToUpper(sourceFileGS.theString.theString[i]);
|
|
stringSize := stringSize + len + 1;
|
|
end {if}
|
|
else
|
|
Error(cge3);
|
|
end; {if}
|
|
end; {GenNam}
|
|
|
|
|
|
procedure GenNat (op: icptr);
|
|
|
|
{ Generate code for a pc_nat }
|
|
|
|
var
|
|
flags: integer; {work var for flags}
|
|
mode: addressingmode; {work var for addressing mode}
|
|
pval: longint; {temp pointer}
|
|
val: longint; {constant operand}
|
|
|
|
begin {GenNat}
|
|
val := op^.opnd;
|
|
flags := op^.q;
|
|
pval := op^.llab;
|
|
mode := addressingMode(op^.r);
|
|
if op^.slab <> 0 then
|
|
val := val+LabelToDisp(op^.slab);
|
|
if mode in [relative,longrelative] then
|
|
GenNative(op^.s, mode, op^.llab, op^.lab, op^.q)
|
|
else if (mode = longabsolute) and (op^.llab <> 0) then
|
|
GenNative(op^.s, mode, long(val).lsw, pointer(pval),
|
|
flags | localLab)
|
|
else if (mode = longabsolute) and (op^.llab = 0)
|
|
and (op^.lab = nil) then
|
|
GenNative(op^.s, mode, 0, pointer(val), flags | constantOpnd)
|
|
else begin
|
|
if (mode = absolute) and (op^.llab = 0) then
|
|
flags := flags | constantOpnd;
|
|
if op^.llab <> 0 then
|
|
GenNative(op^.s, mode, long(val).lsw, pointer(pval),
|
|
flags | localLab)
|
|
else
|
|
GenNative(op^.s, mode, long(val).lsw, op^.lab, flags);
|
|
end; {else}
|
|
end; {GenNat}
|
|
|
|
|
|
procedure GenNgr (op: icptr);
|
|
|
|
{ Generate code for a pc_ngr }
|
|
|
|
begin {GenNgr}
|
|
GenTree(op^.left);
|
|
GenNative(m_lda_s, direct, 9, nil, 0);
|
|
GenNative(m_eor_imm, immediate, -32767-1, nil, 0);
|
|
GenNative(m_sta_s, direct, 9, nil, 0);
|
|
end; {GenNgr}
|
|
|
|
|
|
procedure GenPop (op: icptr);
|
|
|
|
{ Generate code for a pc_pop }
|
|
|
|
var
|
|
isIncLoad: boolean; {is the operand one of the inc/dec & load commands?}
|
|
|
|
begin {GenPop}
|
|
glong.preference := A_X; {generate the operand}
|
|
isIncLoad := op^.left^.opcode in
|
|
[pc_lil,pc_lli,pc_ldl,pc_lld,pc_gil,pc_gli,pc_gdl,pc_gld,
|
|
pc_iil,pc_ili,pc_idl,pc_ild];
|
|
if isIncLoad then
|
|
skipLoad := true;
|
|
if op^.left^.opcode = pc_mov then
|
|
GenMov(op^.left, false)
|
|
else begin
|
|
GenTree(op^.left);
|
|
if isIncLoad then
|
|
skipLoad := false;
|
|
case op^.optype of {do the pop}
|
|
otherwise: ;
|
|
|
|
cgLong, cgULong:
|
|
if not isIncLoad then
|
|
if gLong.where = onStack then begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_pla);
|
|
end; {if}
|
|
{else do nothing}
|
|
|
|
cgReal, cgDouble, cgComp, cgExtended: begin
|
|
GenImplied(m_tsc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, 10, nil, 0);
|
|
GenImplied(m_tcs);
|
|
end;
|
|
end; {case}
|
|
end; {else}
|
|
end; {GenPop}
|
|
|
|
|
|
procedure GenPsh (op: icptr);
|
|
|
|
{ Generate code for a pc_psh }
|
|
|
|
begin {GenPsh}
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
GenTree(op^.right);
|
|
GenImplied(m_pha);
|
|
GenCall(77);
|
|
end; {GenPsh}
|
|
|
|
|
|
procedure GenRealBinOp (op: icptr);
|
|
|
|
{ Generate code for a pc_adr, pc_dvr, pc_mpr or pc_sbr }
|
|
|
|
var
|
|
nd: icptr; {temp pointer}
|
|
snum: integer; {library subroutine numbers}
|
|
ss,sd,sc,se: integer; {sane call numbers}
|
|
|
|
begin {GenRealBinOp}
|
|
case op^.opcode of
|
|
pc_adr: begin
|
|
snum := 56;
|
|
ss := $0200;
|
|
sd := $0100;
|
|
sc := $0500;
|
|
se := $0000;
|
|
end;
|
|
|
|
pc_dvr: begin
|
|
snum := 57;
|
|
ss := $0206;
|
|
sd := $0106;
|
|
sc := $0506;
|
|
se := $0006;
|
|
end;
|
|
|
|
pc_mpr: begin
|
|
snum := 58;
|
|
ss := $0204;
|
|
sd := $0104;
|
|
sc := $0504;
|
|
se := $0004;
|
|
end;
|
|
|
|
pc_sbr: begin
|
|
snum := 59;
|
|
ss := $0202;
|
|
sd := $0102;
|
|
sc := $0502;
|
|
se := $0002;
|
|
end;
|
|
end; {case}
|
|
|
|
if op^.opcode in [pc_mpr,pc_adr] then
|
|
if op^.left^.opcode in [pc_lod,pc_ldo] then begin
|
|
nd := op^.left;
|
|
op^.left := op^.right;
|
|
op^.right := nd;
|
|
end; {if}
|
|
GenTree(op^.left);
|
|
if (op^.right^.opcode in [pc_lod,pc_ldo]) and (floatCard = 0) then
|
|
with op^.right^ do begin
|
|
if opcode = pc_lod then begin
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenImplied(m_tdc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, LabelToDisp(r) + q, nil, 0);
|
|
GenImplied(m_pha);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_pea, immediate, q, lab, shift16);
|
|
GenNative(m_pea, immediate, q, lab, 0);
|
|
end; {else}
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenImplied(m_tsc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, 7, nil, 0);
|
|
GenImplied(m_pha);
|
|
if optype = cgReal then
|
|
sd := ss
|
|
else if optype = cgExtended then
|
|
sd := se
|
|
else if optype = cgComp then
|
|
sd := sc;
|
|
GenNative(m_pea, immediate, sd, nil, 0);
|
|
GenNative(m_ldx_imm, immediate, $090A, nil, 0);
|
|
GenNative(m_jsl, longAbs, 0, nil, toolCall);
|
|
end {with}
|
|
else begin
|
|
GenTree(op^.right);
|
|
GenCall(snum);
|
|
end; {else}
|
|
end; {GenRealBinOp}
|
|
|
|
|
|
procedure GenRet (op: icptr);
|
|
|
|
{ Generate code for a pc_ret }
|
|
|
|
var
|
|
size: integer; {localSize + parameterSize}
|
|
|
|
begin {GenRet}
|
|
{pop the name record}
|
|
if namePushed then
|
|
GenCall(2);
|
|
|
|
{generate an exit code for the debugger's benefit}
|
|
if debugFlag then
|
|
GenNative(m_cop, immediate, 4, nil, 0);
|
|
|
|
{if anything needs to be removed from the stack, move the return val}
|
|
size := localSize + parameterSize;
|
|
if parameterSize <> 0 then begin
|
|
if localSize > 254 then begin
|
|
GenNative(m_ldx_imm, immediate, localSize+1, nil, 0);
|
|
GenNative(m_lda_dirx, direct, 0, nil, 0);
|
|
GenNative(m_ldy_dirx, direct, 1, nil, 0);
|
|
GenNative(m_ldx_imm, immediate,
|
|
localSize+parameterSize+1, nil, 0);
|
|
GenNative(m_sta_dirx, direct, 0, nil, 0);
|
|
GenNative(m_sty_dirx, direct, 1, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_lda_dir, direct, localSize+2, nil, 0);
|
|
if localSize+parameterSize > 253 then begin
|
|
GenNative(m_ldx_imm, immediate,
|
|
localSize+parameterSize+1, nil, 0);
|
|
GenNative(m_sta_dirx, direct, 1, nil, 0);
|
|
GenNative(m_lda_dir, direct, localSize+1, nil, 0);
|
|
GenNative(m_sta_dirx, direct, 0, nil, 0);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_sta_dir, direct,
|
|
localSize+parameterSize+2, nil, 0);
|
|
GenNative(m_lda_dir, direct, localSize+1, nil, 0);
|
|
GenNative(m_sta_dir, direct,
|
|
localSize+parameterSize+1, nil, 0);
|
|
end; {else}
|
|
end; {else}
|
|
end; {if}
|
|
|
|
{load the value to return}
|
|
case op^.optype of
|
|
|
|
cgVoid: ;
|
|
|
|
cgByte,cgUByte: begin
|
|
GenNative(m_lda_dir, direct, funLoc, nil, 0);
|
|
GenNative(m_and_imm, immediate, $00FF, nil, 0);
|
|
if size <> 2 then
|
|
GenImplied(m_tay);
|
|
end;
|
|
|
|
cgWord,cgUWord:
|
|
if size = 2 then
|
|
GenNative(m_lda_dir, direct, funLoc, nil, 0)
|
|
else
|
|
GenNative(m_ldy_dir, direct, funLoc, nil, 0);
|
|
|
|
cgReal:
|
|
GenCall(3);
|
|
|
|
cgDouble:
|
|
GenCall(4);
|
|
|
|
cgComp:
|
|
GenCall(64);
|
|
|
|
cgExtended:
|
|
GenCall(65);
|
|
|
|
cgLong,cgULong: begin
|
|
GenNative(m_ldx_dir, direct, funLoc+2, nil, 0);
|
|
GenNative(m_ldy_dir, direct, funLoc, nil, 0);
|
|
end;
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
|
|
{restore data bank reg}
|
|
if dataBank then begin
|
|
GenNative(m_lda_dir, direct, bankLoc, nil, 0);
|
|
GenImplied(m_pha);
|
|
GenImplied(m_plb);
|
|
GenImplied(m_plb);
|
|
end; {if}
|
|
|
|
{get rid of the stack frame space}
|
|
if size <> 0 then
|
|
GenImplied(m_pld);
|
|
if size = 2 then
|
|
GenImplied(m_ply)
|
|
else if size <> 0 then begin
|
|
GenImplied(m_tsc);
|
|
GenImplied(m_clc);
|
|
GenNative(m_adc_imm, immediate, size, nil, 0);
|
|
GenImplied(m_tcs);
|
|
end; {if}
|
|
|
|
{put return value in correct place}
|
|
case op^.optype of
|
|
cgByte,cgUByte,cgWord,cgUWord: begin
|
|
if size <> 2 then
|
|
GenImplied(m_tya);
|
|
if toolParms then {save value on stack for tools}
|
|
GenNative(m_sta_s, direct, returnSize+1, nil, 0);
|
|
end;
|
|
|
|
cgLong,cgULong,cgReal,cgDouble,cgComp,cgExtended: begin
|
|
GenImplied(m_tya);
|
|
if toolParms then begin {save value on stack for tools}
|
|
GenNative(m_sta_s, direct, returnSize+1, nil, 0);
|
|
GenImplied(m_txa);
|
|
GenNative(m_sta_s, direct, returnSize+3, nil, 0);
|
|
end; {if}
|
|
end;
|
|
|
|
cgVoid: ;
|
|
|
|
otherwise:
|
|
Error(cge1);
|
|
end; {case}
|
|
|
|
{return to the caller}
|
|
GenImplied(m_rtl);
|
|
end; {GenRet}
|
|
|
|
|
|
procedure GenSbfCbf (op: icptr);
|
|
|
|
{ Generate code for a pc_sbf or pc_cbf }
|
|
|
|
begin {GenSbfCbf}
|
|
gLong.preference := onStack;
|
|
GenTree(op^.left);
|
|
GenNative(m_pea, immediate, op^.r, nil, 0);
|
|
GenNative(m_pea, immediate, op^.q, nil, 0);
|
|
if op^.optype in [cgLong,cgULong] then begin
|
|
gLong.preference := onStack;
|
|
GenTree(op^.right);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_pea, immediate, 0, nil, 0);
|
|
GenTree(op^.right);
|
|
GenImplied(m_pha);
|
|
end; {else}
|
|
if op^.opcode = pc_sbf then
|
|
GenCall(74)
|
|
else begin
|
|
GenCall(75);
|
|
if not (op^.optype in [cgLong,cgULong]) then begin
|
|
GenImplied(m_pla);
|
|
GenImplied(m_plx);
|
|
end; {if}
|
|
end; {else}
|
|
end; {GenSbfCbf}
|
|
|
|
|
|
procedure GenSbi (op: icptr);
|
|
|
|
{ Generate code for a pc_sbi }
|
|
|
|
begin {GenSbi}
|
|
if Complex(op^.left) or Complex(op^.right) then begin
|
|
GenTree(op^.right);
|
|
if Complex(op^.left) then begin
|
|
GenImplied(m_pha);
|
|
GenTree(op^.left);
|
|
GenImplied(m_sec);
|
|
GenNative(m_sbc_s, direct, 1, nil, 0);
|
|
GenImplied(m_plx);
|
|
end {if}
|
|
else begin
|
|
GenNative(m_eor_imm, immediate, $FFFF, nil, 0);
|
|
GenImplied(m_sec);
|
|
OperA(m_adc_imm, op^.left);
|
|
end; {else}
|
|
end {if}
|
|
else begin
|
|
GenTree(op^.left);
|
|
GenImplied(m_sec);
|
|
OperA(m_sbc_imm, op^.right);
|
|
end; {else}
|
|
end; {GenSbi}
|
|
|
|
|
|
procedure GenStk (op: icptr);
|
|
|
|
{ Generate code for a pc_stk }
|
|
|
|
var
|
|
lab1: integer; {branch point}
|
|
|
|
begin {GenStk}
|
|
glong.preference := onStack; {generate the operand}
|
|
GenTree(op^.left);
|
|
if op^.optype in {do the stk}
|
|
[cgByte, cgUByte, cgWord, cgUWord] then
|
|
GenImplied(m_pha);
|
|
end; {GenStk}
|
|
|
|
|
|
procedure GenShlShrUsr (op: icptr);
|
|
|
|
{ Generate code for a pc_shl, pc_shr or pc_usr }
|
|
|
|
var
|
|
i,op1,op2,num: integer; {temp variables}
|
|
|
|
begin {GenShlShrUsr}
|
|
{get the standard native operations}
|
|
if op^.opcode = pc_shl then begin
|
|
op1 := m_asl_a;
|
|
op2 := m_lsr_a;
|
|
end {if}
|
|
else begin
|
|
op1 := m_lsr_a;
|
|
op2 := m_asl_a;
|
|
end; {else}
|
|
|
|
{take short cuts if they are legal}
|
|
if (op^.right^.opcode = pc_ldc) and (op^.opcode <> pc_shr) then begin
|
|
num := op^.right^.q;
|
|
if (num > 16) or (num < -16) then
|
|
GenNative(m_lda_imm, immediate, 0, nil, 0)
|
|
else if num > 0 then begin
|
|
GenTree(op^.left);
|
|
if num >= 8 then begin
|
|
GenImplied(m_xba);
|
|
if op1 = m_lsr_a then
|
|
i := $00FF
|
|
else
|
|
i := $FF00;
|
|
GenNative(m_and_imm, immediate, i, nil, 0);
|
|
num := num-8;
|
|
end; {if}
|
|
for i := 1 to num do
|
|
GenImplied(op1);
|
|
end {else if}
|
|
else if num < 0 then begin
|
|
GenTree(op^.left);
|
|
if num <= -8 then begin
|
|
GenImplied(m_xba);
|
|
if op2 = m_lsr_a then
|
|
i := $00FF
|
|
else
|
|
i := $FF00;
|
|
GenNative(m_and_imm, immediate, i, nil, 0);
|
|
num := num+8;
|
|
end; {if}
|
|
for i := 1 to -num do
|
|
GenImplied(op2);
|
|
end {else if}
|
|
else
|
|
GenTree(op^.left);
|
|
end {if}
|
|
else begin
|
|
GenTree(op^.left);
|
|
if Complex(op^.right) then begin
|
|
GenImplied(m_pha);
|
|
GenTree(op^.right);
|
|
GenImplied(m_tax);
|
|
GenImplied(m_pla);
|
|
end {if}
|
|
else
|
|
LoadX(op^.right);
|
|
if op^.opcode = pc_shl then
|
|
GenCall(23)
|
|
else if op^.opcode = pc_shr then
|
|
GenCall(24)
|
|
else {if op^.opcode = pc_usr then}
|
|
GenCall(41);
|
|
end; {else}
|
|
end; {GenShlShrUsr}
|
|
|
|
|
|
procedure GenTl1 (op: icptr);
|
|
|
|
{ Generate code for a pc_tl1 }
|
|
|
|
var
|
|
lLong: longType; {used to reserve gLong}
|
|
tp: baseTypeEnum; {operand type}
|
|
|
|
begin {GenTl1}
|
|
if op^.r in [2,4] then begin
|
|
GenImplied(m_pha);
|
|
if op^.r = 4 then
|
|
GenImplied(m_pha);
|
|
end; {if}
|
|
lLong := gLong;
|
|
GenTree(op^.left);
|
|
gLong := lLong;
|
|
GenNative(m_ldx_imm, immediate, op^.q, nil, 0);
|
|
GenNative(m_jsl, longAbs, 0, pointer(op^.lval), toolCall);
|
|
if smallMemoryModel then
|
|
GenNative(m_sta_abs, absolute, 0, @'~TOOLERROR', 0)
|
|
else
|
|
GenNative(m_sta_long, longAbs, 0, @'~TOOLERROR', 0);
|
|
if op^.r in [2,4] then begin
|
|
if op^.r = 2 then begin
|
|
GenImplied(m_pla);
|
|
tp := cgWord;
|
|
end {if}
|
|
else begin
|
|
gLong.where := onStack;
|
|
tp := cgLong;
|
|
end; {else}
|
|
end; {if}
|
|
end; {GenTl1}
|
|
|
|
|
|
procedure GenTri (op: icptr);
|
|
|
|
{ Generate code for a pc_tri }
|
|
|
|
var
|
|
lab1,lab2,lab3: integer; {label for branches}
|
|
|
|
begin {GenTri}
|
|
lab1 := GenLabel;
|
|
lab2 := GenLabel;
|
|
lab3 := GenLabel;
|
|
GenTree(op^.left);
|
|
if op^.left^.opcode in
|
|
[pc_and,pc_ior,pc_cui,pc_cup,pc_lor,pc_lnd,pc_ldl,pc_lil,pc_lld,
|
|
pc_lli,pc_gil,pc_gli,pc_gdl,pc_gld] then
|
|
GenImplied(m_tax);
|
|
GenNative(m_beq, relative, lab1, nil, 0);
|
|
GenNative(m_brl, longrelative, lab2, nil, 0);
|
|
GenLab(lab1);
|
|
gLong.preference := onStack;
|
|
GenTree(op^.right^.right);
|
|
GenNative(m_brl, longrelative, lab3, nil, 0);
|
|
GenLab(lab2);
|
|
gLong.preference := onStack;
|
|
GenTree(op^.right^.left);
|
|
GenLab(lab3);
|
|
gLong.where := onStack;
|
|
end; {GenTri}
|
|
|
|
|
|
procedure GenXjp (op: icptr);
|
|
|
|
{ Generate code for a pc_xjp }
|
|
|
|
var
|
|
lab1,lab2: integer;
|
|
q: integer;
|
|
|
|
begin {GenXjp}
|
|
q := op^.q;
|
|
GenTree(op^.left);
|
|
GenNative(m_cmp_imm, immediate, q, nil, 0);
|
|
lab1 := GenLabel;
|
|
GenNative(m_bcc, relative, lab1, nil, 0);
|
|
GenNative(m_lda_imm, immediate, q, nil, 0);
|
|
GenLab(lab1);
|
|
GenImplied(m_asl_a);
|
|
GenImplied(m_tax);
|
|
lab1 := GenLabel;
|
|
GenNative(m_lda_longx, longAbs, lab1, nil, 0);
|
|
GenImplied(m_pha);
|
|
GenImplied(m_rts);
|
|
GenLab(lab1);
|
|
end; {GenXjp}
|
|
|
|
|
|
procedure DirEnp;
|
|
|
|
{ Generate code for a dc_enp }
|
|
|
|
begin {DirEnp}
|
|
GenImplied(d_end);
|
|
EndSeg;
|
|
InitLabels;
|
|
end; {DirEnp}
|
|
|
|
|
|
procedure DirStr (op: icptr);
|
|
|
|
{ Generate code for a dc_str }
|
|
|
|
begin {DirStr}
|
|
skipLoad := false;
|
|
InitNative;
|
|
Header(op^.lab, op^.r, op^.q);
|
|
end; {DirStr}
|
|
|
|
|
|
procedure DirSym (op: icptr);
|
|
|
|
{ Generate code for a dc_sym }
|
|
|
|
begin {DirSym}
|
|
if debugFlag then
|
|
GenNative(d_sym, special, op^.q, pointer(op^.lab), 0);
|
|
end; {DirSym}
|
|
|
|
|
|
begin {GenTree}
|
|
{write('GEN: '); WriteCode(op); {debug}
|
|
Spin;
|
|
case op^.opcode of
|
|
dc_cns: GenNative(d_cns, gnrConstant, op^.q, pointer(op), 0);
|
|
dc_dst: GenNative(d_lab, gnrSpace, op^.q, nil, 0);
|
|
dc_enp: DirEnp;
|
|
dc_lab: GenLab(op^.q);
|
|
dc_loc,dc_prm: ;
|
|
dc_glb: GenNative(d_lab, gnrLabel, op^.r, op^.lab, isPrivate*op^.q);
|
|
dc_pin: GenNative(d_pin, special, 0, nil, 0);
|
|
dc_str: DirStr(op);
|
|
dc_sym: DirSym(op);
|
|
pc_add: GenNative(d_add, genaddress, op^.q, nil, 0);
|
|
pc_adi: GenAdi(op);
|
|
pc_adl,pc_sbl: GenAdlSbl(op, nil);
|
|
pc_adr,pc_dvr,pc_mpr,pc_sbr: GenRealBinOp(op);
|
|
pc_and,pc_bnd,pc_bor,pc_bxr,pc_ior: GenLogic(op);
|
|
pc_blr,pc_blx,pc_bal,pc_dvl,pc_mdl,pc_mpl,pc_sll,pc_slr,pc_udl,pc_ulm,
|
|
pc_uml,pc_vsr: GenBinLong(op);
|
|
pc_bnl,pc_ngl: GenUnaryLong(op);
|
|
pc_bno: GenBno(op);
|
|
pc_bnt,pc_ngi,pc_not: GenBntNgiNot(op);
|
|
pc_cnv: GenCnv(op);
|
|
pc_cui: GenCui(op);
|
|
pc_cup: GenCup(op);
|
|
pc_dec,pc_inc: GenIncDec(op, nil);
|
|
pc_dvi,pc_mod,pc_udi,pc_uim: GenDviMod(op);
|
|
pc_ent: GenEnt;
|
|
pc_equ,pc_neq: GenEquNeq(op, op^.opcode, 0);
|
|
pc_fjp,pc_tjp: GenFjpTjp(op);
|
|
pc_geq,pc_grt,pc_leq,pc_les: GenCmp(op, op^.opcode, 0);
|
|
pc_gil,pc_gli,pc_gdl,pc_gld: GenGilGliGdlGld(op);
|
|
pc_iil,pc_ili,pc_idl,pc_ild: GenIilIliIdlIld(op);
|
|
pc_ind: GenInd(op);
|
|
pc_ixa: GenIxa(op);
|
|
pc_lao,pc_lad: GenLaoLad(op);
|
|
pc_lbf,pc_lbu: GenLbfLbu(op);
|
|
pc_lca: GenLca(op);
|
|
pc_lda: GenLda(op);
|
|
pc_ldc: GenLdc(op);
|
|
pc_ldo: GenLdo(op);
|
|
pc_lil,pc_lli,pc_ldl,pc_lld: GenLilLliLdlLld(op);
|
|
pc_lnm: GenLnm(op);
|
|
pc_lod: GenLod(op);
|
|
pc_lor,pc_lnd: GenLorLnd(op);
|
|
pc_mov: GenMov(op, true);
|
|
pc_mpi,pc_umi: GenMpi(op);
|
|
pc_nam: GenNam(op);
|
|
pc_nat: GenNat(op);
|
|
pc_ngr: GenNgr(op);
|
|
pc_nop: ;
|
|
pc_pop: GenPop(op);
|
|
pc_psh: GenPsh(op);
|
|
pc_ret: GenRet(op);
|
|
pc_sbf,pc_cbf: GenSbfCbf(op);
|
|
pc_sbi: GenSbi(op);
|
|
pc_shl,pc_shr,pc_usr: GenShlShrUsr(op);
|
|
pc_stk: GenStk(op);
|
|
pc_sro,pc_cpo: GenSroCpo(op);
|
|
pc_sto,pc_cpi: GenStoCpi(op);
|
|
pc_str,pc_cop: GenStrCop(op);
|
|
pc_tl1: GenTl1(op);
|
|
pc_tri: GenTri(op);
|
|
pc_ujp: GenNative(m_brl, longrelative, op^.q, nil, 0);
|
|
pc_xjp: GenXjp(op);
|
|
|
|
otherwise: Error(cge1);
|
|
end; {case}
|
|
end; {GenTree}
|
|
|
|
{---------------------------------------------------------------}
|
|
|
|
procedure Gen {blk: blockPtr};
|
|
|
|
{ Generates native code for a list of blocks }
|
|
{ }
|
|
{ parameters: }
|
|
{ blk - first of the list of blocks }
|
|
|
|
const
|
|
locSize = 4; {variables <= this size allocated first}
|
|
|
|
var
|
|
bk: blockPtr; {used to trace block lists}
|
|
minSize: integer; {location for the next local label}
|
|
op: icptr; {used to trace code lists}
|
|
|
|
|
|
procedure DirLoc1 (op: icptr);
|
|
|
|
{ allocates stack frame locations for small dc_loc }
|
|
|
|
begin {DirLoc1}
|
|
if op^.q <= locSize then begin
|
|
if op^.r < maxLocalLabel then begin
|
|
localLabel[op^.r] := minSize;
|
|
minSize := minSize + op^.q;
|
|
end {if}
|
|
else
|
|
Error(cge2);
|
|
end; {if}
|
|
end; {DirLoc1}
|
|
|
|
|
|
procedure DirLoc2 (op: icptr);
|
|
|
|
{ allocates stack frame locations for large dc_loc }
|
|
|
|
begin {DirLoc2}
|
|
if op^.q > locSize then begin
|
|
if op^.r < maxLocalLabel then begin
|
|
localLabel[op^.r] := minSize;
|
|
minSize := minSize + op^.q;
|
|
end {if}
|
|
else
|
|
Error(cge2);
|
|
end; {if}
|
|
end; {DirLoc2}
|
|
|
|
|
|
procedure DirPrm (op: icptr);
|
|
|
|
{ allocates stack frame locations for parameters }
|
|
|
|
begin {DirPrm}
|
|
if op^.s < maxLocalLabel then
|
|
localLabel[op^.s] := localSize + returnSize + 1 + op^.r
|
|
else
|
|
Error(cge2);
|
|
end; {DirPrm}
|
|
|
|
|
|
procedure Scan (op: icptr);
|
|
|
|
{ scans the code stream for instructions that effect the }
|
|
{ size of the stack frame }
|
|
{ }
|
|
{ parameters: }
|
|
{ op - scan this opcode and its children }
|
|
|
|
var
|
|
opcode: pcodes; {op^.opcode}
|
|
size: integer; {function return value size}
|
|
|
|
begin {Scan}
|
|
if op^.left <> nil then
|
|
Scan(op^.left);
|
|
if op^.right <> nil then
|
|
Scan(op^.right);
|
|
opcode := op^.opcode;
|
|
if opcode = dc_loc then
|
|
localSize := localSize + op^.q
|
|
else if opcode = dc_prm then
|
|
parameterSize := parameterSize + op^.q
|
|
else if opcode = pc_ret then begin
|
|
case op^.optype of
|
|
otherwise: size := 0;
|
|
cgByte,cgUByte,cgWord,cgUWord: size := cgWordSize;
|
|
cgReal: size := cgRealSize;
|
|
cgDouble: size := cgDoubleSize;
|
|
cgComp: size := cgCompSize;
|
|
cgExtended: size := cgExtendedSize;
|
|
cgLong,cgULong: size := cgLongSize;
|
|
end; {case}
|
|
funLoc := 1;
|
|
if dworkLoc <> 0 then
|
|
dworkLoc := dworkLoc + size;
|
|
minSize := minSize + size;
|
|
localSize := localSize + size;
|
|
end {else if}
|
|
else if opcode in
|
|
[pc_les,pc_leq,pc_grt,pc_geq,pc_sto,pc_cpi,pc_ind,pc_lor,pc_lnd,
|
|
pc_ili,pc_iil,pc_idl,pc_ild,pc_ixa]
|
|
then begin
|
|
if dworkLoc = 0 then begin
|
|
dworkLoc := minSize;
|
|
minSize := minSize + 4;
|
|
localSize := localSize + 4;
|
|
end; {if}
|
|
end; {else if}
|
|
end; {Scan}
|
|
|
|
|
|
begin {Gen}
|
|
bk := blk; {determine the size of the stack frame}
|
|
localSize := 0;
|
|
parameterSize := 0;
|
|
funLoc := 0;
|
|
dworkLoc := 0;
|
|
minSize := 1;
|
|
while bk <> nil do begin
|
|
op := bk^.code;
|
|
while op <> nil do begin
|
|
Scan(op);
|
|
op := op^.next;
|
|
end; {while}
|
|
bk := bk^.next;
|
|
end; {while}
|
|
if saveStack or checkStack or strictVararg then begin
|
|
stackLoc := minSize;
|
|
minSize := minSize + 2;
|
|
localSize := localSize + 2;
|
|
end; {if}
|
|
if dataBank then begin
|
|
bankLoc := minSize;
|
|
minSize := minSize + 2;
|
|
localSize := localSize + 2;
|
|
end; {if}
|
|
bk := blk; {allocate locations for the values}
|
|
while bk <> nil do begin
|
|
op := bk^.code;
|
|
while op <> nil do begin
|
|
if op^.opcode = dc_loc then
|
|
DirLoc1(op)
|
|
else if op^.opcode = dc_prm then
|
|
DirPrm(op);
|
|
op := op^.next;
|
|
end; {while}
|
|
bk := bk^.next;
|
|
end; {while}
|
|
bk := blk;
|
|
while bk <> nil do begin
|
|
op := bk^.code;
|
|
while op <> nil do begin
|
|
if op^.opcode = dc_loc then
|
|
DirLoc2(op);
|
|
op := op^.next;
|
|
end; {while}
|
|
bk := bk^.next;
|
|
end; {while}
|
|
while blk <> nil do begin {generate code for the block}
|
|
op := blk^.code;
|
|
while op <> nil do begin
|
|
GenTree(op);
|
|
op := op^.next;
|
|
end; {while}
|
|
blk := blk^.next;
|
|
end; {while}
|
|
end; {Gen}
|
|
|
|
|
|
function LabelToDisp {lab: integer): integer};
|
|
|
|
{ convert a local label number to a stack frame displacement }
|
|
{ }
|
|
{ parameters: }
|
|
{ lab - label number }
|
|
|
|
begin {LabelToDisp}
|
|
if lab = 0 then
|
|
LabelToDisp := funLoc
|
|
else
|
|
LabelToDisp := localLabel[lab];
|
|
end; {LabelToDisp}
|
|
|
|
end.
|