mirror of
https://github.com/byteworksinc/ORCA-Pascal.git
synced 2024-08-19 19:29:03 +00:00
252 lines
9.5 KiB
ObjectPascal
252 lines
9.5 KiB
ObjectPascal
{$optimize -1}
|
|
{---------------------------------------------------------------}
|
|
{ }
|
|
{ ORCA Code Generator Common }
|
|
{ }
|
|
{ This unit contains the command constants, types, }
|
|
{ variables and procedures used throughout the code }
|
|
{ generator, but which are not available to the compiler. }
|
|
{ }
|
|
{---------------------------------------------------------------}
|
|
{ }
|
|
{ These routines are defined in the compiler, but used from }
|
|
{ the code generator. }
|
|
{ }
|
|
{ Error - flag an error }
|
|
{ CMalloc - Clear and allocate memory from a pool. }
|
|
{ Malloc - Allocate memory from a pool. }
|
|
{ }
|
|
{---------------------------------------------------------------}
|
|
|
|
unit CGC;
|
|
|
|
interface
|
|
|
|
{$LibPrefix '0/obj/'}
|
|
|
|
uses PCommon, CGI;
|
|
|
|
{$segment 'cg'}
|
|
|
|
const
|
|
{Code Generation}
|
|
{---------------}
|
|
maxCBuff = 191; {length of constant buffer}
|
|
|
|
{65816 native code generation}
|
|
{----------------------------}
|
|
{instruction modifier flags}
|
|
shift8 = 1; {shift operand left 8 bits}
|
|
shift16 = 2; {shift operand left 16 bits}
|
|
toolCall = 4; {generate a tool call}
|
|
stringReference = 8; {generate a string reference}
|
|
usertoolCall = 16; {generate a usertool call}
|
|
isPrivate = 32; {is the label private?}
|
|
constantOpnd = 64; {the absolute operand is a constant}
|
|
localLab = 128; {the operand is a local lab}
|
|
sub1 = 256; {subtract 1 from the operand}
|
|
|
|
m_adc_abs = $6D; {op code #s for 65816 instructions}
|
|
m_adc_dir = $65;
|
|
m_adc_imm = $69;
|
|
m_adc_s = $63;
|
|
m_and_abs = $2D;
|
|
m_and_dir = $25;
|
|
m_and_imm = $29;
|
|
m_and_s = $23;
|
|
m_asl_a = $0A;
|
|
m_bcc = $90;
|
|
m_bcs = $B0;
|
|
m_beq = $F0;
|
|
m_bit_imm = $89;
|
|
m_bmi = $30;
|
|
m_bne = $D0;
|
|
m_bpl = $10;
|
|
m_bra = $80;
|
|
m_brl = $82;
|
|
m_bvs = $70;
|
|
m_clc = $18;
|
|
m_cmp_abs = $CD;
|
|
m_cmp_dir = $C5;
|
|
m_cmp_dirX = $D5;
|
|
m_cmp_imm = $C9;
|
|
m_cmp_long = $CF;
|
|
m_cmp_s = $C3;
|
|
m_cop = $02;
|
|
m_cpx_abs = 236;
|
|
m_cpx_dir = 228;
|
|
m_cpx_imm = 224;
|
|
m_dea = 58;
|
|
m_dec_abs = 206;
|
|
m_dec_absX = $DE;
|
|
m_dec_dir = 198;
|
|
m_dec_dirX = 214;
|
|
m_dex = 202;
|
|
m_dey = 136;
|
|
m_eor_abs = 77;
|
|
m_eor_dir = 69;
|
|
m_eor_imm = 73;
|
|
m_eor_s = 67;
|
|
m_ina = 26;
|
|
m_inc_abs = 238;
|
|
m_inc_absX = $FE;
|
|
m_inc_dir = 230;
|
|
m_inc_dirX = 246;
|
|
m_inx = 232;
|
|
m_iny = 200;
|
|
m_jml = 92;
|
|
m_jsl = 34;
|
|
m_lda_abs = 173;
|
|
m_lda_absx = 189;
|
|
m_lda_dir = 165;
|
|
m_lda_dirx = 181;
|
|
m_lda_imm = 169;
|
|
m_lda_indl = 167;
|
|
m_lda_indly = 183;
|
|
m_lda_long = 175;
|
|
m_lda_longx = 191;
|
|
m_lda_s = 163;
|
|
m_ldx_abs = 174;
|
|
m_ldx_dir = 166;
|
|
m_ldx_imm = 162;
|
|
m_ldy_abs = 172;
|
|
m_ldy_absX = 188;
|
|
m_ldy_dir = 164;
|
|
m_ldy_dirX = 180;
|
|
m_ldy_imm = 160;
|
|
m_lsr_a = 74;
|
|
m_mvn = 84;
|
|
m_ora_abs = 13;
|
|
m_ora_dir = 5;
|
|
m_ora_dirX = 21;
|
|
m_ora_imm = 9;
|
|
m_ora_longX = 31;
|
|
m_ora_s = 3;
|
|
m_pea = 244;
|
|
m_pei_dir = 212;
|
|
m_pha = 72;
|
|
m_phb = 139;
|
|
m_phd = 11;
|
|
m_phk = $4B;
|
|
m_phx = 218;
|
|
m_phy = 90;
|
|
m_php = 8;
|
|
m_pla = 104;
|
|
m_plb = 171;
|
|
m_pld = 43;
|
|
m_plx = 250;
|
|
m_ply = 122;
|
|
m_plp = 40;
|
|
m_rep = 194;
|
|
m_rtl = 107;
|
|
m_rts = 96;
|
|
m_sbc_abs = 237;
|
|
m_sbc_dir = 229;
|
|
m_sbc_imm = 233;
|
|
m_sbc_s = 227;
|
|
m_sec = 56;
|
|
m_sep = 226;
|
|
m_sta_abs = 141;
|
|
m_sta_absX = 157;
|
|
m_sta_dir = 133;
|
|
m_sta_dirX = 149;
|
|
m_sta_indl = 135;
|
|
m_sta_indlY = 151;
|
|
m_sta_long = 143;
|
|
m_sta_longX = 159;
|
|
m_sta_s = 131;
|
|
m_stx_dir = 134;
|
|
m_stx_abs = 142;
|
|
m_sty_abs = 140;
|
|
m_sty_dir = 132;
|
|
m_sty_dirX = 148;
|
|
m_stz_abs = 156;
|
|
m_stz_absX = 158;
|
|
m_stz_dir = 100;
|
|
m_stz_dirX = 116;
|
|
m_tax = 170;
|
|
m_tay = 168;
|
|
m_tcd = 91;
|
|
m_tcs = 27;
|
|
m_tdc = 123;
|
|
m_tsx = $BA;
|
|
m_txa = 138;
|
|
m_txs = $9A;
|
|
m_txy = 155;
|
|
m_tya = 152;
|
|
m_tyx = 187;
|
|
m_tsb_dir = $04;
|
|
m_tsb_abs = $0C;
|
|
m_tsc = 59;
|
|
m_xba = $EB;
|
|
|
|
d_lab = 256;
|
|
d_end = 257;
|
|
d_bmov = 258;
|
|
d_add = 259;
|
|
d_pin = 260;
|
|
d_wrd = 261;
|
|
d_sym = 262;
|
|
d_cns = 263;
|
|
|
|
max_opcode = 263;
|
|
|
|
type
|
|
{pcode code generation}
|
|
{---------------------}
|
|
realrec = record {used to convert from real to in-SANE}
|
|
itsReal: double;
|
|
inSANE: packed array[1..10] of byte;
|
|
inCOMP: packed array[1..8] of byte;
|
|
end;
|
|
|
|
{65816 native code generation}
|
|
{----------------------------}
|
|
labelptr = ^labelentry; {pointer to a forward ref node}
|
|
labelentry = record {forward ref node}
|
|
addr: integer;
|
|
next: labelptr;
|
|
end;
|
|
|
|
labelrec = record {label record}
|
|
defined: boolean; {Note: form used in objout.asm}
|
|
chain: labelptr;
|
|
case boolean of
|
|
true : (val: longint);
|
|
false: (ival,hval: integer);
|
|
end;
|
|
|
|
var
|
|
{msc}
|
|
{---}
|
|
blkcnt: integer; {number of bytes in current segment}
|
|
|
|
{buffers}
|
|
{-------}
|
|
cbufflen: 0..maxcbuff; {number of bytes now in cbuff}
|
|
segDisp: integer; {disp in the current segment}
|
|
|
|
{65816 native code generation}
|
|
{----------------------------}
|
|
labeltab: array[0..maxlabel] of labelrec; {label table}
|
|
localLabel: array[0..maxLocalLabel] of integer; {local variable label table}
|
|
pc: longint; {program counter}
|
|
|
|
{---------------------------------------------------------------}
|
|
|
|
procedure CnvSX (rec: realrec); extern;
|
|
|
|
{ convert a real number to SANE extended format }
|
|
{ }
|
|
{ parameters: }
|
|
{ rec - record containing the value to convert; also }
|
|
{ has space for the result }
|
|
|
|
{---------------------------------------------------------------}
|
|
|
|
implementation
|
|
|
|
end.
|
|
|
|
{$append 'CGC.asm'}
|