Basic infrastructure for using different quadword locations in codegen.

For the moment, this does not really do anything, but it lays the groundwork for not always having to load quadword values to the stack before operating on or storing them.
This commit is contained in:
Stephen Heumann 2021-02-20 17:07:47 -06:00
parent 58f2ebddec
commit 3c0e4baf78

51
Gen.pas
View File

@ -39,12 +39,14 @@ procedure Gen (blk: blockPtr);
implementation
const
A_X = 1; {longword locations}
{longword/quadword locations}
A_X = 1; {longword only}
onStack = 2;
inPointer = 4;
localAddress = 8;
globalLabel = 16;
constant = 32;
nowhere = 64;
{stack frame locations}
{---------------------}
@ -60,10 +62,20 @@ type
disp: integer; {fixed displacement/local addr}
lval: longint; {value}
lab: stringPtr; {global label name}
end;
{possible locations for 8 byte values}
{note: these always have fixed disp}
quadType = record {description of current 8 byte value}
preference: integer; {where you want the value}
where: integer; {where the value is at}
disp: integer; {fixed displacement/local addr}
lval: longlong; {value}
lab: stringPtr; {global label name}
end;
var
gLong: longType; {info about last long value}
gQuad: quadType; {info about last quad value}
namePushed: boolean; {has a name been pushed in this proc?}
skipLoad: boolean; {skip load for a pc_lli, etc?}
stackSaveDepth: integer; {nesting depth of saved stack positions}
@ -689,7 +701,9 @@ procedure GenAdqSbq (op: icptr);
{ op - pc_adq or pc_sbq operation }
begin {GenAdqSbq}
gQuad.preference := onStack;
GenTree(op^.right);
gQuad.preference := onStack;
GenTree(op^.left);
if op^.opcode = pc_adq then begin
GenImplied(m_clc);
@ -721,6 +735,7 @@ else {if op^.opcode = pc_sbq then} begin
GenNative(m_sbc_s, direct, 7, nil, 0);
GenNative(m_sta_s, direct, 7, nil, 0);
end; {else}
gQuad.where := onStack;
end; {GenAdqSbq}
@ -1162,11 +1177,15 @@ else
cgQuad: begin
if op^.opcode = pc_geq then begin
gQuad.preference := onStack;
GenTree(op^.left);
gQuad.preference := onStack;
GenTree(op^.right);
end {if}
else {if op^.opcode = pc_grt then} begin
gQuad.preference := onStack;
GenTree(op^.right);
gQuad.preference := onStack;
GenTree(op^.left);
end; {else}
GenCall(88);
@ -1192,7 +1211,9 @@ else
end; {case optype of cgQuad}
cgUQuad: begin
gQuad.preference := onStack;
GenTree(op^.left);
gQuad.preference := onStack;
GenTree(op^.right);
if op^.opcode = pc_geq then
GenNative(m_ldx_imm, immediate, 1, nil, 0)
@ -1355,6 +1376,7 @@ begin {GenCnv}
lLong := gLong;
gLong.preference := onStack+A_X+constant;
gLong.where := onStack;
gQuad.preference := onStack;
if ((op^.q & $00F0) >> 4) in [cDouble,cExtended,cComp] then begin
op^.q := (op^.q & $000F) | (cReal * 16);
fromReal := true;
@ -1364,6 +1386,7 @@ else
if (op^.q & $000F) in [cDouble,cExtended,cComp] then
op^.q := (op^.q & $00F0) | cReal;
GenTree(op^.left);
gQuad.where := onStack; {unless overridden below}
if op^.q in [wordToLong,wordToUlong] then begin
lab1 := GenLabel;
GenNative(m_ldx_imm, immediate, 0, nil, 0);
@ -1991,7 +2014,9 @@ else
end; {case optype of cgReal..cgExtended}
cgQuad,cgUQuad: begin
gQuad.preference := onStack;
GenTree(op^.left);
gQuad.preference := onStack;
GenTree(op^.right);
lab1 := GenLabel;
@ -2931,6 +2956,7 @@ case optype of
GenImplied(m_pha);
end; {else}
end; {else}
gQuad.where := onStack;
end; {case cgQuad,cgUQuad}
otherwise: Error(cge1);
end; {case}
@ -3773,6 +3799,7 @@ case optype of
end; {case CGLong, cgULong}
cgQuad, cgUQuad: begin
gQuad.preference := onStack;
GenTree(op^.left);
if opcode = pc_sro then
GenImplied(m_pla)
@ -3806,6 +3833,8 @@ case optype of
GenNative(m_sta_abs, absolute, q+6, lab, 0)
else
GenNative(m_sta_long, longabsolute, q+6, lab, 0);
if opcode = pc_cpo then
gQuad.where := onStack;
end; {case cgQuad, cgUQuad}
end; {case}
end; {GenSroCpo}
@ -3920,6 +3949,7 @@ case optype of
end; {case cgReal,cgDouble,cgComp,cgExtended}
cgQuad,cgUQuad: begin
gQuad.preference := onStack;
GenTree(op^.right);
gLong.preference := A_X;
GenTree(op^.left);
@ -3954,6 +3984,8 @@ case optype of
else {if op^.opcode = pc_cpi then}
GenNative(m_lda_s, direct, 7, nil, 0);
GenNative(m_sta_indly, direct, dworkLoc, nil, 0);
if op^.opcode = pc_cpi then
gQuad.where := onStack;
end; {case cgQuad,cgUQuad}
cgLong,cgULong: begin
@ -4454,6 +4486,7 @@ case optype of
end;
cgQuad, cgUQuad: begin
gQuad.preference := onStack;
GenTree(op^.left);
if disp < 250 then begin
if op^.opcode = pc_str then
@ -4500,6 +4533,8 @@ case optype of
GenNative(m_lda_s, direct, 7, nil, 0);
GenNative(m_sta_dirX, direct, 6, nil, 0);
end; {else}
if op^.opcode = pc_cop then
gQuad.where := onStack;
end;
otherwise: Error(cge1);
@ -4545,6 +4580,7 @@ procedure GenUnaryQuad (op: icptr);
{ generate a pc_bnq or pc_ngq }
begin {GenUnaryQuad}
gQuad.preference := onStack;
GenTree(op^.left);
case op^.opcode of {do the operation}
@ -4580,6 +4616,7 @@ case op^.opcode of {do the operation}
GenNative(m_sta_s, direct, 7, nil, 0);
end; {case pc_ngq}
end; {case}
gQuad.where := onStack;
end; {GenUnaryQuad}
@ -4774,7 +4811,9 @@ procedure GenTree {op: icptr};
end; {GenOp}
begin {GenBinQuad}
gQuad.preference := onStack;
GenTree(op^.left);
gQuad.preference := onStack;
GenTree(op^.right);
case op^.opcode of
pc_bqr: GenOp(m_ora_s);
@ -4833,6 +4872,7 @@ procedure GenTree {op: icptr};
otherwise: Error(cge1);
end; {case}
gQuad.where := onStack;
end; {GenBinQuad}
@ -4982,6 +5022,7 @@ procedure GenTree {op: icptr};
{save the returned value}
gLong.where := A_X;
gQuad.where := onStack;
SaveRetValue(op^.optype);
argsSize := lArgsSize;
end; {GenCui}
@ -5076,6 +5117,7 @@ procedure GenTree {op: icptr};
{save the returned value}
gLong.where := A_X;
gQuad.where := onStack;
SaveRetValue(op^.optype);
argsSize := lArgsSize;
end; {GenCup}
@ -5402,6 +5444,7 @@ procedure GenTree {op: icptr};
GenNative(m_pea, immediate, long(op^.qval.hi).lsw, nil, 0);
GenNative(m_pea, immediate, long(op^.qval.lo).msw, nil, 0);
GenNative(m_pea, immediate, long(op^.qval.lo).lsw, nil, 0);
gQuad.where := onStack;
end;
otherwise:
@ -5500,6 +5543,7 @@ procedure GenTree {op: icptr};
GenNative(m_lda_long, longabsolute, op^.q, op^.lab, 0);
GenImplied(m_pha);
end; {else}
gQuad.where := onStack;
end; {case cgQuad,cgUQuad}
otherwise:
@ -5573,6 +5617,7 @@ procedure GenTree {op: icptr};
GenNative(m_pei_dir, direct, disp+2, nil, 0);
GenNative(m_pei_dir, direct, disp, nil, 0);
end; {else}
gQuad.where := onStack;
end;
cgLong, cgULong: begin
@ -5929,6 +5974,7 @@ procedure GenTree {op: icptr};
begin {GenPop}
glong.preference := A_X; {generate the operand}
gQuad.preference := nowhere;
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];
@ -5954,10 +6000,12 @@ procedure GenTree {op: icptr};
{else do nothing}
cgQuad, cgUQuad: begin
if gQuad.where = onStack then begin
GenImplied(m_tsc);
GenImplied(m_clc);
GenNative(m_adc_imm, immediate, 8, nil, 0);
GenImplied(m_tcs);
end; {if}
end;
cgReal, cgDouble, cgComp, cgExtended: begin
@ -6301,6 +6349,7 @@ procedure GenTree {op: icptr};
otherwise: Error(cge1);
end; {case}
glong.preference := onStack; {generate the operand}
gQuad.preference := onStack;
GenTree(op^.left);
if op^.optype in {do the stk}
[cgByte, cgUByte, cgWord, cgUWord] then