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Diffstat (limited to 'lcc/src/x86.md')
-rwxr-xr-xlcc/src/x86.md1996
1 files changed, 998 insertions, 998 deletions
diff --git a/lcc/src/x86.md b/lcc/src/x86.md
index 7e8b84f..6c4e1c4 100755
--- a/lcc/src/x86.md
+++ b/lcc/src/x86.md
@@ -1,998 +1,998 @@
-%{
-enum { EAX=0, ECX=1, EDX=2, EBX=3, ESI=6, EDI=7 };
-#include "c.h"
-#define NODEPTR_TYPE Node
-#define OP_LABEL(p) ((p)->op)
-#define LEFT_CHILD(p) ((p)->kids[0])
-#define RIGHT_CHILD(p) ((p)->kids[1])
-#define STATE_LABEL(p) ((p)->x.state)
-static void address(Symbol, Symbol, long);
-static void blkfetch(int, int, int, int);
-static void blkloop(int, int, int, int, int, int[]);
-static void blkstore(int, int, int, int);
-static void defaddress(Symbol);
-static void defconst(int, int, Value);
-static void defstring(int, char *);
-static void defsymbol(Symbol);
-static void doarg(Node);
-static void emit2(Node);
-static void export(Symbol);
-static void clobber(Node);
-static void function(Symbol, Symbol [], Symbol [], int);
-static void global(Symbol);
-static void import(Symbol);
-static void local(Symbol);
-static void progbeg(int, char **);
-static void progend(void);
-static void segment(int);
-static void space(int);
-static void target(Node);
-extern int ckstack(Node, int);
-extern int memop(Node);
-extern int sametree(Node, Node);
-static Symbol charreg[32], shortreg[32], intreg[32];
-static Symbol fltreg[32];
-
-static Symbol charregw, shortregw, intregw, fltregw;
-
-static int cseg;
-
-static Symbol quo, rem;
-
-%}
-%start stmt
-%term CNSTF4=4113
-%term CNSTF8=8209
-%term CNSTF16=16401
-%term CNSTI1=1045
-%term CNSTI2=2069
-%term CNSTI4=4117
-%term CNSTI8=8213
-%term CNSTP4=4119
-%term CNSTP8=8215
-%term CNSTU1=1046
-%term CNSTU2=2070
-%term CNSTU4=4118
-%term CNSTU8=8214
-
-%term ARGB=41
-%term ARGF4=4129
-%term ARGF8=8225
-%term ARGF16=16417
-%term ARGI4=4133
-%term ARGI8=8229
-%term ARGP4=4135
-%term ARGP8=8231
-%term ARGU4=4134
-%term ARGU8=8230
-
-%term ASGNB=57
-%term ASGNF4=4145
-%term ASGNF8=8241
-%term ASGNF16=16433
-%term ASGNI1=1077
-%term ASGNI2=2101
-%term ASGNI4=4149
-%term ASGNI8=8245
-%term ASGNP4=4151
-%term ASGNP8=8247
-%term ASGNU1=1078
-%term ASGNU2=2102
-%term ASGNU4=4150
-%term ASGNU8=8246
-
-%term INDIRB=73
-%term INDIRF4=4161
-%term INDIRF8=8257
-%term INDIRF16=16449
-%term INDIRI1=1093
-%term INDIRI2=2117
-%term INDIRI4=4165
-%term INDIRI8=8261
-%term INDIRP4=4167
-%term INDIRP8=8263
-%term INDIRU1=1094
-%term INDIRU2=2118
-%term INDIRU4=4166
-%term INDIRU8=8262
-
-%term CVFF4=4209
-%term CVFF8=8305
-%term CVFF16=16497
-%term CVFI4=4213
-%term CVFI8=8309
-
-%term CVIF4=4225
-%term CVIF8=8321
-%term CVIF16=16513
-%term CVII1=1157
-%term CVII2=2181
-%term CVII4=4229
-%term CVII8=8325
-%term CVIU1=1158
-%term CVIU2=2182
-%term CVIU4=4230
-%term CVIU8=8326
-
-%term CVPP4=4247
-%term CVPP8=8343
-%term CVPP16=16535
-%term CVPU4=4246
-%term CVPU8=8342
-
-%term CVUI1=1205
-%term CVUI2=2229
-%term CVUI4=4277
-%term CVUI8=8373
-%term CVUP4=4279
-%term CVUP8=8375
-%term CVUP16=16567
-%term CVUU1=1206
-%term CVUU2=2230
-%term CVUU4=4278
-%term CVUU8=8374
-
-%term NEGF4=4289
-%term NEGF8=8385
-%term NEGF16=16577
-%term NEGI4=4293
-%term NEGI8=8389
-
-%term CALLB=217
-%term CALLF4=4305
-%term CALLF8=8401
-%term CALLF16=16593
-%term CALLI4=4309
-%term CALLI8=8405
-%term CALLP4=4311
-%term CALLP8=8407
-%term CALLU4=4310
-%term CALLU8=8406
-%term CALLV=216
-
-%term RETF4=4337
-%term RETF8=8433
-%term RETF16=16625
-%term RETI4=4341
-%term RETI8=8437
-%term RETP4=4343
-%term RETP8=8439
-%term RETU4=4342
-%term RETU8=8438
-%term RETV=248
-
-%term ADDRGP4=4359
-%term ADDRGP8=8455
-
-%term ADDRFP4=4375
-%term ADDRFP8=8471
-
-%term ADDRLP4=4391
-%term ADDRLP8=8487
-
-%term ADDF4=4401
-%term ADDF8=8497
-%term ADDF16=16689
-%term ADDI4=4405
-%term ADDI8=8501
-%term ADDP4=4407
-%term ADDP8=8503
-%term ADDU4=4406
-%term ADDU8=8502
-
-%term SUBF4=4417
-%term SUBF8=8513
-%term SUBF16=16705
-%term SUBI4=4421
-%term SUBI8=8517
-%term SUBP4=4423
-%term SUBP8=8519
-%term SUBU4=4422
-%term SUBU8=8518
-
-%term LSHI4=4437
-%term LSHI8=8533
-%term LSHU4=4438
-%term LSHU8=8534
-
-%term MODI4=4453
-%term MODI8=8549
-%term MODU4=4454
-%term MODU8=8550
-
-%term RSHI4=4469
-%term RSHI8=8565
-%term RSHU4=4470
-%term RSHU8=8566
-
-%term BANDI4=4485
-%term BANDI8=8581
-%term BANDU4=4486
-%term BANDU8=8582
-
-%term BCOMI4=4501
-%term BCOMI8=8597
-%term BCOMU4=4502
-%term BCOMU8=8598
-
-%term BORI4=4517
-%term BORI8=8613
-%term BORU4=4518
-%term BORU8=8614
-
-%term BXORI4=4533
-%term BXORI8=8629
-%term BXORU4=4534
-%term BXORU8=8630
-
-%term DIVF4=4545
-%term DIVF8=8641
-%term DIVF16=16833
-%term DIVI4=4549
-%term DIVI8=8645
-%term DIVU4=4550
-%term DIVU8=8646
-
-%term MULF4=4561
-%term MULF8=8657
-%term MULF16=16849
-%term MULI4=4565
-%term MULI8=8661
-%term MULU4=4566
-%term MULU8=8662
-
-%term EQF4=4577
-%term EQF8=8673
-%term EQF16=16865
-%term EQI4=4581
-%term EQI8=8677
-%term EQU4=4582
-%term EQU8=8678
-
-%term GEF4=4593
-%term GEF8=8689
-%term GEI4=4597
-%term GEI8=8693
-%term GEI16=16885
-%term GEU4=4598
-%term GEU8=8694
-
-%term GTF4=4609
-%term GTF8=8705
-%term GTF16=16897
-%term GTI4=4613
-%term GTI8=8709
-%term GTU4=4614
-%term GTU8=8710
-
-%term LEF4=4625
-%term LEF8=8721
-%term LEF16=16913
-%term LEI4=4629
-%term LEI8=8725
-%term LEU4=4630
-%term LEU8=8726
-
-%term LTF4=4641
-%term LTF8=8737
-%term LTF16=16929
-%term LTI4=4645
-%term LTI8=8741
-%term LTU4=4646
-%term LTU8=8742
-
-%term NEF4=4657
-%term NEF8=8753
-%term NEF16=16945
-%term NEI4=4661
-%term NEI8=8757
-%term NEU4=4662
-%term NEU8=8758
-
-%term JUMPV=584
-
-%term LABELV=600
-
-%term LOADB=233
-%term LOADF4=4321
-%term LOADF8=8417
-%term LOADF16=16609
-%term LOADI1=1253
-%term LOADI2=2277
-%term LOADI4=4325
-%term LOADI8=8421
-%term LOADP4=4327
-%term LOADP8=8423
-%term LOADU1=1254
-%term LOADU2=2278
-%term LOADU4=4326
-%term LOADU8=8422
-
-%term VREGP=711
-%%
-reg: INDIRI1(VREGP) "# read register\n"
-reg: INDIRU1(VREGP) "# read register\n"
-
-reg: INDIRI2(VREGP) "# read register\n"
-reg: INDIRU2(VREGP) "# read register\n"
-
-reg: INDIRF4(VREGP) "# read register\n"
-reg: INDIRI4(VREGP) "# read register\n"
-reg: INDIRP4(VREGP) "# read register\n"
-reg: INDIRU4(VREGP) "# read register\n"
-
-reg: INDIRF8(VREGP) "# read register\n"
-reg: INDIRI8(VREGP) "# read register\n"
-reg: INDIRP8(VREGP) "# read register\n"
-reg: INDIRU8(VREGP) "# read register\n"
-
-stmt: ASGNI1(VREGP,reg) "# write register\n"
-stmt: ASGNU1(VREGP,reg) "# write register\n"
-
-stmt: ASGNI2(VREGP,reg) "# write register\n"
-stmt: ASGNU2(VREGP,reg) "# write register\n"
-
-stmt: ASGNF4(VREGP,reg) "# write register\n"
-stmt: ASGNI4(VREGP,reg) "# write register\n"
-stmt: ASGNP4(VREGP,reg) "# write register\n"
-stmt: ASGNU4(VREGP,reg) "# write register\n"
-
-stmt: ASGNF8(VREGP,reg) "# write register\n"
-stmt: ASGNI8(VREGP,reg) "# write register\n"
-stmt: ASGNP8(VREGP,reg) "# write register\n"
-stmt: ASGNU8(VREGP,reg) "# write register\n"
-con: CNSTI1 "%a"
-con: CNSTU1 "%a"
-
-con: CNSTI2 "%a"
-con: CNSTU2 "%a"
-
-con: CNSTI4 "%a"
-con: CNSTU4 "%a"
-con: CNSTP4 "%a"
-
-con: CNSTI8 "%a"
-con: CNSTU8 "%a"
-con: CNSTP8 "%a"
-stmt: reg ""
-acon: ADDRGP4 "(%a)"
-acon: con "(%0)"
-base: ADDRGP4 "(%a)"
-base: reg "[%0]"
-base: ADDI4(reg,acon) "%1[%0]"
-base: ADDP4(reg,acon) "%1[%0]"
-base: ADDU4(reg,acon) "%1[%0]"
-base: ADDRFP4 "(%a)[ebp]"
-base: ADDRLP4 "(%a)[ebp]"
-index: reg "%0"
-index: LSHI4(reg,con1) "%0*2"
-index: LSHI4(reg,con2) "%0*4"
-index: LSHI4(reg,con3) "%0*8"
-
-con1: CNSTI4 "1" range(a, 1, 1)
-con1: CNSTU4 "1" range(a, 1, 1)
-con2: CNSTI4 "2" range(a, 2, 2)
-con2: CNSTU4 "2" range(a, 2, 2)
-con3: CNSTI4 "3" range(a, 3, 3)
-con3: CNSTU4 "3" range(a, 3, 3)
-index: LSHU4(reg,con1) "%0*2"
-index: LSHU4(reg,con2) "%0*4"
-index: LSHU4(reg,con3) "%0*8"
-addr: base "%0"
-addr: ADDI4(index,base) "%1[%0]"
-addr: ADDP4(index,base) "%1[%0]"
-addr: ADDU4(index,base) "%1[%0]"
-addr: index "[%0]"
-mem: INDIRI1(addr) "byte ptr %0"
-mem: INDIRI2(addr) "word ptr %0"
-mem: INDIRI4(addr) "dword ptr %0"
-mem: INDIRU1(addr) "byte ptr %0"
-mem: INDIRU2(addr) "word ptr %0"
-mem: INDIRU4(addr) "dword ptr %0"
-mem: INDIRP4(addr) "dword ptr %0"
-rc: reg "%0"
-rc: con "%0"
-
-mr: reg "%0"
-mr: mem "%0"
-
-mrc0: mem "%0"
-mrc0: rc "%0"
-mrc1: mem "%0" 1
-mrc1: rc "%0"
-
-mrc3: mem "%0" 3
-mrc3: rc "%0"
-reg: addr "lea %c,%0\n" 1
-reg: mrc0 "mov %c,%0\n" 1
-reg: LOADI1(reg) "# move\n" 1
-reg: LOADI2(reg) "# move\n" 1
-reg: LOADI4(reg) "# move\n" move(a)
-reg: LOADU1(reg) "# move\n" 1
-reg: LOADU2(reg) "# move\n" 1
-reg: LOADU4(reg) "# move\n" move(a)
-reg: LOADP4(reg) "# move\n" move(a)
-reg: ADDI4(reg,mrc1) "?mov %c,%0\nadd %c,%1\n" 1
-reg: ADDP4(reg,mrc1) "?mov %c,%0\nadd %c,%1\n" 1
-reg: ADDU4(reg,mrc1) "?mov %c,%0\nadd %c,%1\n" 1
-reg: SUBI4(reg,mrc1) "?mov %c,%0\nsub %c,%1\n" 1
-reg: SUBP4(reg,mrc1) "?mov %c,%0\nsub %c,%1\n" 1
-reg: SUBU4(reg,mrc1) "?mov %c,%0\nsub %c,%1\n" 1
-reg: BANDI4(reg,mrc1) "?mov %c,%0\nand %c,%1\n" 1
-reg: BORI4(reg,mrc1) "?mov %c,%0\nor %c,%1\n" 1
-reg: BXORI4(reg,mrc1) "?mov %c,%0\nxor %c,%1\n" 1
-reg: BANDU4(reg,mrc1) "?mov %c,%0\nand %c,%1\n" 1
-reg: BORU4(reg,mrc1) "?mov %c,%0\nor %c,%1\n" 1
-reg: BXORU4(reg,mrc1) "?mov %c,%0\nxor %c,%1\n" 1
-stmt: ASGNI4(addr,ADDI4(mem,con1)) "inc %1\n" memop(a)
-stmt: ASGNI4(addr,ADDU4(mem,con1)) "inc %1\n" memop(a)
-stmt: ASGNP4(addr,ADDP4(mem,con1)) "inc %1\n" memop(a)
-stmt: ASGNI4(addr,SUBI4(mem,con1)) "dec %1\n" memop(a)
-stmt: ASGNI4(addr,SUBU4(mem,con1)) "dec %1\n" memop(a)
-stmt: ASGNP4(addr,SUBP4(mem,con1)) "dec %1\n" memop(a)
-stmt: ASGNI4(addr,ADDI4(mem,rc)) "add %1,%2\n" memop(a)
-stmt: ASGNI4(addr,SUBI4(mem,rc)) "sub %1,%2\n" memop(a)
-stmt: ASGNU4(addr,ADDU4(mem,rc)) "add %1,%2\n" memop(a)
-stmt: ASGNU4(addr,SUBU4(mem,rc)) "sub %1,%2\n" memop(a)
-
-stmt: ASGNI4(addr,BANDI4(mem,rc)) "and %1,%2\n" memop(a)
-stmt: ASGNI4(addr,BORI4(mem,rc)) "or %1,%2\n" memop(a)
-stmt: ASGNI4(addr,BXORI4(mem,rc)) "xor %1,%2\n" memop(a)
-stmt: ASGNU4(addr,BANDU4(mem,rc)) "and %1,%2\n" memop(a)
-stmt: ASGNU4(addr,BORU4(mem,rc)) "or %1,%2\n" memop(a)
-stmt: ASGNU4(addr,BXORU4(mem,rc)) "xor %1,%2\n" memop(a)
-reg: BCOMI4(reg) "?mov %c,%0\nnot %c\n" 2
-reg: BCOMU4(reg) "?mov %c,%0\nnot %c\n" 2
-reg: NEGI4(reg) "?mov %c,%0\nneg %c\n" 2
-
-stmt: ASGNI4(addr,BCOMI4(mem)) "not %1\n" memop(a)
-stmt: ASGNU4(addr,BCOMU4(mem)) "not %1\n" memop(a)
-stmt: ASGNI4(addr,NEGI4(mem)) "neg %1\n" memop(a)
-reg: LSHI4(reg,con5) "?mov %c,%0\nsal %c,%1\n" 2
-reg: LSHU4(reg,con5) "?mov %c,%0\nshl %c,%1\n" 2
-reg: RSHI4(reg,con5) "?mov %c,%0\nsar %c,%1\n" 2
-reg: RSHU4(reg,con5) "?mov %c,%0\nshr %c,%1\n" 2
-
-stmt: ASGNI4(addr,LSHI4(mem,con5)) "sal %1,%2\n" memop(a)
-stmt: ASGNI4(addr,LSHU4(mem,con5)) "shl %1,%2\n" memop(a)
-stmt: ASGNI4(addr,RSHI4(mem,con5)) "sar %1,%2\n" memop(a)
-stmt: ASGNI4(addr,RSHU4(mem,con5)) "shr %1,%2\n" memop(a)
-
-con5: CNSTI4 "%a" range(a, 0, 31)
-
-reg: LSHI4(reg,reg) "?mov %c,%0\nmov ecx,%1\nsal %c,cl\n" 3
-reg: LSHU4(reg,reg) "?mov %c,%0\nmov ecx,%1\nshl %c,cl\n" 2
-reg: RSHI4(reg,reg) "?mov %c,%0\nmov ecx,%1\nsar %c,cl\n" 2
-reg: RSHU4(reg,reg) "?mov %c,%0\nmov ecx,%1\nshr %c,cl\n" 2
-reg: MULI4(reg,mrc3) "?mov %c,%0\nimul %c,%1\n" 14
-reg: MULI4(con,mr) "imul %c,%1,%0\n" 13
-reg: MULU4(reg,mr) "mul %1\n" 13
-reg: DIVU4(reg,reg) "xor edx,edx\ndiv %1\n"
-reg: MODU4(reg,reg) "xor edx,edx\ndiv %1\n"
-reg: DIVI4(reg,reg) "cdq\nidiv %1\n"
-reg: MODI4(reg,reg) "cdq\nidiv %1\n"
-reg: CVPU4(reg) "mov %c,%0\n" move(a)
-reg: CVUP4(reg) "mov %c,%0\n" move(a)
-reg: CVII4(INDIRI1(addr)) "movsx %c,byte ptr %0\n" 3
-reg: CVII4(INDIRI2(addr)) "movsx %c,word ptr %0\n" 3
-reg: CVUU4(INDIRU1(addr)) "movzx %c,byte ptr %0\n" 3
-reg: CVUU4(INDIRU2(addr)) "movzx %c,word ptr %0\n" 3
-reg: CVII4(reg) "# extend\n" 3
-reg: CVIU4(reg) "# extend\n" 3
-reg: CVUI4(reg) "# extend\n" 3
-reg: CVUU4(reg) "# extend\n" 3
-
-reg: CVII1(reg) "# truncate\n" 1
-reg: CVII2(reg) "# truncate\n" 1
-reg: CVUU1(reg) "# truncate\n" 1
-reg: CVUU2(reg) "# truncate\n" 1
-stmt: ASGNI1(addr,rc) "mov byte ptr %0,%1\n" 1
-stmt: ASGNI2(addr,rc) "mov word ptr %0,%1\n" 1
-stmt: ASGNI4(addr,rc) "mov dword ptr %0,%1\n" 1
-stmt: ASGNU1(addr,rc) "mov byte ptr %0,%1\n" 1
-stmt: ASGNU2(addr,rc) "mov word ptr %0,%1\n" 1
-stmt: ASGNU4(addr,rc) "mov dword ptr %0,%1\n" 1
-stmt: ASGNP4(addr,rc) "mov dword ptr %0,%1\n" 1
-stmt: ARGI4(mrc3) "push %0\n" 1
-stmt: ARGU4(mrc3) "push %0\n" 1
-stmt: ARGP4(mrc3) "push %0\n" 1
-stmt: ASGNB(reg,INDIRB(reg)) "mov ecx,%a\nrep movsb\n"
-stmt: ARGB(INDIRB(reg)) "sub esp,%a\nmov edi,esp\nmov ecx,%a\nrep movsb\n"
-
-memf: INDIRF8(addr) "qword ptr %0"
-memf: INDIRF4(addr) "dword ptr %0"
-memf: CVFF8(INDIRF4(addr)) "dword ptr %0"
-reg: memf "fld %0\n" 3
-stmt: ASGNF8(addr,reg) "fstp qword ptr %0\n" 7
-stmt: ASGNF4(addr,reg) "fstp dword ptr %0\n" 7
-stmt: ASGNF4(addr,CVFF4(reg)) "fstp dword ptr %0\n" 7
-stmt: ARGF8(reg) "sub esp,8\nfstp qword ptr [esp]\n"
-stmt: ARGF4(reg) "sub esp,4\nfstp dword ptr [esp]\n"
-reg: NEGF8(reg) "fchs\n"
-reg: NEGF4(reg) "fchs\n"
-flt: memf " %0"
-flt: reg "p st(1),st"
-reg: ADDF8(reg,flt) "fadd%1\n"
-reg: ADDF4(reg,flt) "fadd%1\n"
-reg: DIVF8(reg,flt) "fdiv%1\n"
-reg: DIVF4(reg,flt) "fdiv%1\n"
-reg: MULF8(reg,flt) "fmul%1\n"
-reg: MULF4(reg,flt) "fmul%1\n"
-reg: SUBF8(reg,flt) "fsub%1\n"
-reg: SUBF4(reg,flt) "fsub%1\n"
-reg: CVFF8(reg) "# CVFF8\n"
-reg: CVFF4(reg) "sub esp,4\nfstp dword ptr 0[esp]\nfld dword ptr 0[esp]\nadd esp,4\n" 12
-
-reg: CVFI4(reg) "call __ftol\n" 31
-reg: CVIF8(INDIRI4(addr)) "fild dword ptr %0\n" 10
-reg: CVIF4(reg) "push %0\nfild dword ptr 0[esp]\nadd esp,4\n" 12
-
-reg: CVIF8(reg) "push %0\nfild dword ptr 0[esp]\nadd esp,4\n" 12
-
-addrj: ADDRGP4 "%a"
-addrj: reg "%0" 2
-addrj: mem "%0" 2
-
-stmt: JUMPV(addrj) "jmp %0\n" 3
-stmt: LABELV "%a:\n"
-stmt: EQI4(mem,rc) "cmp %0,%1\nje %a\n" 5
-stmt: GEI4(mem,rc) "cmp %0,%1\njge %a\n" 5
-stmt: GTI4(mem,rc) "cmp %0,%1\njg %a\n" 5
-stmt: LEI4(mem,rc) "cmp %0,%1\njle %a\n" 5
-stmt: LTI4(mem,rc) "cmp %0,%1\njl %a\n" 5
-stmt: NEI4(mem,rc) "cmp %0,%1\njne %a\n" 5
-stmt: GEU4(mem,rc) "cmp %0,%1\njae %a\n" 5
-stmt: GTU4(mem,rc) "cmp %0,%1\nja %a\n" 5
-stmt: LEU4(mem,rc) "cmp %0,%1\njbe %a\n" 5
-stmt: LTU4(mem,rc) "cmp %0,%1\njb %a\n" 5
-stmt: EQI4(reg,mrc1) "cmp %0,%1\nje %a\n" 4
-stmt: GEI4(reg,mrc1) "cmp %0,%1\njge %a\n" 4
-stmt: GTI4(reg,mrc1) "cmp %0,%1\njg %a\n" 4
-stmt: LEI4(reg,mrc1) "cmp %0,%1\njle %a\n" 4
-stmt: LTI4(reg,mrc1) "cmp %0,%1\njl %a\n" 4
-stmt: NEI4(reg,mrc1) "cmp %0,%1\njne %a\n" 4
-
-stmt: EQU4(reg,mrc1) "cmp %0,%1\nje %a\n" 4
-stmt: GEU4(reg,mrc1) "cmp %0,%1\njae %a\n" 4
-stmt: GTU4(reg,mrc1) "cmp %0,%1\nja %a\n" 4
-stmt: LEU4(reg,mrc1) "cmp %0,%1\njbe %a\n" 4
-stmt: LTU4(reg,mrc1) "cmp %0,%1\njb %a\n" 4
-stmt: NEU4(reg,mrc1) "cmp %0,%1\njne %a\n" 4
-cmpf: memf " %0"
-cmpf: reg "p"
-stmt: EQF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\nje %a\n"
-stmt: GEF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njbe %a\n"
-stmt: GTF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njb %a\n"
-stmt: LEF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njae %a\n"
-stmt: LTF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\nja %a\n"
-stmt: NEF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njne %a\n"
-
-stmt: EQF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\nje %a\n"
-stmt: GEF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njbe %a\n"
-stmt: GTF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njb %a\n"
-stmt: LEF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njae %a\n"
-stmt: LTF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\nja %a\n"
-stmt: NEF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njne %a\n"
-reg: CALLI4(addrj) "call %0\nadd esp,%a\n"
-reg: CALLU4(addrj) "call %0\nadd esp,%a\n"
-reg: CALLP4(addrj) "call %0\nadd esp,%a\n"
-stmt: CALLV(addrj) "call %0\nadd esp,%a\n"
-reg: CALLF4(addrj) "call %0\nadd esp,%a\n"
-reg: CALLF8(addrj) "call %0\nadd esp,%a\n"
-stmt: CALLF4(addrj) "call %0\nadd esp,%a\nfstp\n"
-stmt: CALLF8(addrj) "call %0\nadd esp,%a\nfstp\n"
-
-stmt: RETI4(reg) "# ret\n"
-stmt: RETU4(reg) "# ret\n"
-stmt: RETP4(reg) "# ret\n"
-stmt: RETF4(reg) "# ret\n"
-stmt: RETF8(reg) "# ret\n"
-%%
-static void progbeg(int argc, char *argv[]) {
- int i;
-
- {
- union {
- char c;
- int i;
- } u;
- u.i = 0;
- u.c = 1;
- swap = ((int)(u.i == 1)) != IR->little_endian;
- }
- parseflags(argc, argv);
- intreg[EAX] = mkreg("eax", EAX, 1, IREG);
- intreg[EDX] = mkreg("edx", EDX, 1, IREG);
- intreg[ECX] = mkreg("ecx", ECX, 1, IREG);
- intreg[EBX] = mkreg("ebx", EBX, 1, IREG);
- intreg[ESI] = mkreg("esi", ESI, 1, IREG);
- intreg[EDI] = mkreg("edi", EDI, 1, IREG);
-
- shortreg[EAX] = mkreg("ax", EAX, 1, IREG);
- shortreg[ECX] = mkreg("cx", ECX, 1, IREG);
- shortreg[EDX] = mkreg("dx", EDX, 1, IREG);
- shortreg[EBX] = mkreg("bx", EBX, 1, IREG);
- shortreg[ESI] = mkreg("si", ESI, 1, IREG);
- shortreg[EDI] = mkreg("di", EDI, 1, IREG);
-
- charreg[EAX] = mkreg("al", EAX, 1, IREG);
- charreg[ECX] = mkreg("cl", ECX, 1, IREG);
- charreg[EDX] = mkreg("dl", EDX, 1, IREG);
- charreg[EBX] = mkreg("bl", EBX, 1, IREG);
- for (i = 0; i < 8; i++)
- fltreg[i] = mkreg("%d", i, 0, FREG);
- charregw = mkwildcard(charreg);
- shortregw = mkwildcard(shortreg);
- intregw = mkwildcard(intreg);
- fltregw = mkwildcard(fltreg);
-
- tmask[IREG] = (1<<EDI) | (1<<ESI) | (1<<EBX)
- | (1<<EDX) | (1<<ECX) | (1<<EAX);
- vmask[IREG] = 0;
- tmask[FREG] = 0xff;
- vmask[FREG] = 0;
- print(".486\n");
- print(".model flat\n");
- print("extrn __fltused:near\n");
- print("extrn __ftol:near\n");
- cseg = 0;
- quo = mkreg("eax", EAX, 1, IREG);
- quo->x.regnode->mask |= 1<<EDX;
- rem = mkreg("edx", EDX, 1, IREG);
- rem->x.regnode->mask |= 1<<EAX;
-}
-static Symbol rmap(int opk) {
- switch (optype(opk)) {
- case B: case P:
- return intregw;
- case I: case U:
- if (opsize(opk) == 1)
- return charregw;
- else if (opsize(opk) == 2)
- return shortregw;
- else
- return intregw;
- case F:
- return fltregw;
- default:
- return 0;
- }
-}
-static void segment(int n) {
- if (n == cseg)
- return;
- if (cseg == CODE || cseg == LIT)
- print("_TEXT ends\n");
- else if (cseg == DATA || cseg == BSS)
- print("_DATA ends\n");
- cseg = n;
- if (cseg == CODE || cseg == LIT)
- print("_TEXT segment\n");
- else if (cseg == DATA || cseg == BSS)
- print("_DATA segment\n");
-}
-static void progend(void) {
- segment(0);
- print("end\n");
-}
-static void target(Node p) {
- assert(p);
- switch (specific(p->op)) {
- case MUL+U:
- setreg(p, quo);
- rtarget(p, 0, intreg[EAX]);
- break;
- case DIV+I: case DIV+U:
- setreg(p, quo);
- rtarget(p, 0, quo);
- break;
- case MOD+I: case MOD+U:
- setreg(p, rem);
- rtarget(p, 0, quo);
- break;
- case ASGN+B:
- rtarget(p, 0, intreg[EDI]);
- rtarget(p->kids[1], 0, intreg[ESI]);
- break;
- case ARG+B:
- rtarget(p->kids[0], 0, intreg[ESI]);
- break;
- case CVF+I:
- setreg(p, intreg[EAX]);
- break;
- case CALL+I: case CALL+U: case CALL+P: case CALL+V:
- setreg(p, intreg[EAX]);
- break;
- case RET+I: case RET+U: case RET+P:
- rtarget(p, 0, intreg[EAX]);
- break;
- }
-}
-
-static void clobber(Node p) {
- static int nstack = 0;
-
- assert(p);
- nstack = ckstack(p, nstack);
- switch (specific(p->op)) {
- case RSH+I: case RSH+U: case LSH+I: case LSH+U:
- if (generic(p->kids[1]->op) != CNST
- && !( generic(p->kids[1]->op) == INDIR
- && specific(p->kids[1]->kids[0]->op) == VREG+P
- && p->kids[1]->syms[RX]->u.t.cse
- && generic(p->kids[1]->syms[RX]->u.t.cse->op) == CNST
-)) {
- spill(1<<ECX, 1, p);
- }
- break;
- case ASGN+B: case ARG+B:
- spill(1<<ECX | 1<<ESI | 1<<EDI, IREG, p);
- break;
- case EQ+F: case LE+F: case GE+F: case LT+F: case GT+F: case NE+F:
- spill(1<<EAX, IREG, p);
- break;
- case CALL+F:
- spill(1<<EDX | 1<<EAX | 1<<ECX, IREG, p);
- break;
- case CALL+I: case CALL+U: case CALL+P: case CALL+V:
- spill(1<<EDX | 1<<ECX, IREG, p);
- break;
- }
-}
-#define isfp(p) (optype((p)->op)==F)
-
-int ckstack(Node p, int n) {
- int i;
-
- for (i = 0; i < NELEMS(p->x.kids) && p->x.kids[i]; i++)
- if (isfp(p->x.kids[i]))
- n--;
- if (isfp(p) && p->count > 0)
- n++;
- if (n > 8)
- error("expression too complicated\n");
- debug(fprint(stderr, "(ckstack(%x)=%d)\n", p, n));
- assert(n >= 0);
- return n;
-}
-int memop(Node p) {
- assert(p);
- assert(generic(p->op) == ASGN);
- assert(p->kids[0]);
- assert(p->kids[1]);
- if (generic(p->kids[1]->kids[0]->op) == INDIR
- && sametree(p->kids[0], p->kids[1]->kids[0]->kids[0]))
- return 3;
- else
- return LBURG_MAX;
-}
-int sametree(Node p, Node q) {
- return p == NULL && q == NULL
- || p && q && p->op == q->op && p->syms[0] == q->syms[0]
- && sametree(p->kids[0], q->kids[0])
- && sametree(p->kids[1], q->kids[1]);
-}
-static void emit2(Node p) {
- int op = specific(p->op);
-#define preg(f) ((f)[getregnum(p->x.kids[0])]->x.name)
-
- if (op == CVI+I && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 1)
- print("movsx %s,%s\n", p->syms[RX]->x.name
-, preg(charreg));
- else if (op == CVI+U && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 1)
- print("movsx %s,%s\n", p->syms[RX]->x.name
-, preg(charreg));
- else if (op == CVI+I && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 2)
- print("movsx %s,%s\n", p->syms[RX]->x.name
-, preg(shortreg));
- else if (op == CVI+U && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 2)
- print("movsx %s,%s\n", p->syms[RX]->x.name
-, preg(shortreg));
-
- else if (op == CVU+I && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 1)
- print("movzx %s,%s\n", p->syms[RX]->x.name
-, preg(charreg));
- else if (op == CVU+U && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 1)
- print("movzx %s,%s\n", p->syms[RX]->x.name
-, preg(charreg));
- else if (op == CVU+I && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 2)
- print("movzx %s,%s\n", p->syms[RX]->x.name
-, preg(shortreg));
- else if (op == CVU+U && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 2)
- print("movzx %s,%s\n", p->syms[RX]->x.name
-, preg(shortreg));
- else if (generic(op) == CVI || generic(op) == CVU || generic(op) == LOAD) {
- char *dst = intreg[getregnum(p)]->x.name;
- char *src = preg(intreg);
- assert(opsize(p->op) <= opsize(p->x.kids[0]->op));
- if (dst != src)
- print("mov %s,%s\n", dst, src);
- }
-}
-
-static void doarg(Node p) {
- assert(p && p->syms[0]);
- mkactual(4, p->syms[0]->u.c.v.i);
-}
-static void blkfetch(int k, int off, int reg, int tmp) {}
-static void blkstore(int k, int off, int reg, int tmp) {}
-static void blkloop(int dreg, int doff, int sreg, int soff,
- int size, int tmps[]) {}
-static void local(Symbol p) {
- if (isfloat(p->type))
- p->sclass = AUTO;
- if (askregvar(p, (*IR->x.rmap)(ttob(p->type))) == 0)
- mkauto(p);
-}
-static void function(Symbol f, Symbol caller[], Symbol callee[], int n) {
- int i;
-
- print("%s:\n", f->x.name);
- print("push ebx\n");
- print("push esi\n");
- print("push edi\n");
- print("push ebp\n");
- print("mov ebp,esp\n");
- usedmask[0] = usedmask[1] = 0;
- freemask[0] = freemask[1] = ~(unsigned)0;
- offset = 16 + 4;
- for (i = 0; callee[i]; i++) {
- Symbol p = callee[i];
- Symbol q = caller[i];
- assert(q);
- p->x.offset = q->x.offset = offset;
- p->x.name = q->x.name = stringf("%d", p->x.offset);
- p->sclass = q->sclass = AUTO;
- offset += roundup(q->type->size, 4);
- }
- assert(caller[i] == 0);
- offset = maxoffset = 0;
- gencode(caller, callee);
- framesize = roundup(maxoffset, 4);
- if (framesize > 0)
- print("sub esp,%d\n", framesize);
- emitcode();
- print("mov esp,ebp\n");
- print("pop ebp\n");
- print("pop edi\n");
- print("pop esi\n");
- print("pop ebx\n");
- print("ret\n");
-}
-static void defsymbol(Symbol p) {
- if (p->scope >= LOCAL && p->sclass == STATIC)
- p->x.name = stringf("L%d", genlabel(1));
- else if (p->generated)
- p->x.name = stringf("L%s", p->name);
- else if (p->scope == GLOBAL || p->sclass == EXTERN)
- p->x.name = stringf("_%s", p->name);
- else if (p->scope == CONSTANTS
- && (isint(p->type) || isptr(p->type))
- && p->name[0] == '0' && p->name[1] == 'x')
- p->x.name = stringf("0%sH", &p->name[2]);
- else
- p->x.name = p->name;
-}
-static void address(Symbol q, Symbol p, long n) {
- if (p->scope == GLOBAL
- || p->sclass == STATIC || p->sclass == EXTERN)
- q->x.name = stringf("%s%s%D",
- p->x.name, n >= 0 ? "+" : "", n);
- else {
- assert(n <= INT_MAX && n >= INT_MIN);
- q->x.offset = p->x.offset + n;
- q->x.name = stringd(q->x.offset);
- }
-}
-static void defconst(int suffix, int size, Value v) {
- if (suffix == I && size == 1)
- print("db %d\n", v.u);
- else if (suffix == I && size == 2)
- print("dw %d\n", v.i);
- else if (suffix == I && size == 4)
- print("dd %d\n", v.i);
- else if (suffix == U && size == 1)
- print("db 0%xH\n", v.u);
- else if (suffix == U && size == 2)
- print("dw 0%xH\n", v.u);
- else if (suffix == U && size == 4)
- print("dd 0%xH\n", v.u);
- else if (suffix == P && size == 4)
- print("dd 0%xH\n", v.p);
- else if (suffix == F && size == 4) {
- float f = v.d;
- print("dd 0%xH\n", *(unsigned *)&f);
- }
- else if (suffix == F && size == 8) {
- double d = v.d;
- unsigned *p = (unsigned *)&d;
- print("dd 0%xH\ndd 0%xH\n", p[swap], p[!swap]);
- }
- else assert(0);
-}
-static void defaddress(Symbol p) {
- print("dd %s\n", p->x.name);
-}
-static void defstring(int n, char *str) {
- char *s;
-
- for (s = str; s < str + n; s++)
- print("db %d\n", (*s)&0377);
-}
-static void export(Symbol p) {
- print("public %s\n", p->x.name);
-}
-static void import(Symbol p) {
- int oldseg = cseg;
-
- if (p->ref > 0) {
- segment(0);
- print("extrn %s:near\n", p->x.name);
- segment(oldseg);
- }
-}
-static void global(Symbol p) {
- print("align %d\n",
- p->type->align > 4 ? 4 : p->type->align);
- print("%s label byte\n", p->x.name);
- if (p->u.seg == BSS)
- print("db %d dup (0)\n", p->type->size);
-}
-static void space(int n) {
- if (cseg != BSS)
- print("db %d dup (0)\n", n);
-}
-Interface x86IR = {
- 1, 1, 0, /* char */
- 2, 2, 0, /* short */
- 4, 4, 0, /* int */
- 4, 4, 0, /* long */
- 4, 4, 0, /* long long */
- 4, 4, 1, /* float */
- 8, 4, 1, /* double */
- 8, 4, 1, /* long double */
- 4, 4, 0, /* T * */
- 0, 4, 0, /* struct; so that ARGB keeps stack aligned */
- 1, /* little_endian */
- 0, /* mulops_calls */
- 0, /* wants_callb */
- 1, /* wants_argb */
- 0, /* left_to_right */
- 0, /* wants_dag */
- 0, /* unsigned_char */
- address,
- blockbeg,
- blockend,
- defaddress,
- defconst,
- defstring,
- defsymbol,
- emit,
- export,
- function,
- gen,
- global,
- import,
- local,
- progbeg,
- progend,
- segment,
- space,
- 0, 0, 0, 0, 0, 0, 0,
- {1, rmap,
- blkfetch, blkstore, blkloop,
- _label,
- _rule,
- _nts,
- _kids,
- _string,
- _templates,
- _isinstruction,
- _ntname,
- emit2,
- doarg,
- target,
- clobber,
-}
-};
-static char rcsid[] = "$Id: x86.md 145 2001-10-17 21:53:10Z timo $";
+%{
+enum { EAX=0, ECX=1, EDX=2, EBX=3, ESI=6, EDI=7 };
+#include "c.h"
+#define NODEPTR_TYPE Node
+#define OP_LABEL(p) ((p)->op)
+#define LEFT_CHILD(p) ((p)->kids[0])
+#define RIGHT_CHILD(p) ((p)->kids[1])
+#define STATE_LABEL(p) ((p)->x.state)
+static void address(Symbol, Symbol, long);
+static void blkfetch(int, int, int, int);
+static void blkloop(int, int, int, int, int, int[]);
+static void blkstore(int, int, int, int);
+static void defaddress(Symbol);
+static void defconst(int, int, Value);
+static void defstring(int, char *);
+static void defsymbol(Symbol);
+static void doarg(Node);
+static void emit2(Node);
+static void export(Symbol);
+static void clobber(Node);
+static void function(Symbol, Symbol [], Symbol [], int);
+static void global(Symbol);
+static void import(Symbol);
+static void local(Symbol);
+static void progbeg(int, char **);
+static void progend(void);
+static void segment(int);
+static void space(int);
+static void target(Node);
+extern int ckstack(Node, int);
+extern int memop(Node);
+extern int sametree(Node, Node);
+static Symbol charreg[32], shortreg[32], intreg[32];
+static Symbol fltreg[32];
+
+static Symbol charregw, shortregw, intregw, fltregw;
+
+static int cseg;
+
+static Symbol quo, rem;
+
+%}
+%start stmt
+%term CNSTF4=4113
+%term CNSTF8=8209
+%term CNSTF16=16401
+%term CNSTI1=1045
+%term CNSTI2=2069
+%term CNSTI4=4117
+%term CNSTI8=8213
+%term CNSTP4=4119
+%term CNSTP8=8215
+%term CNSTU1=1046
+%term CNSTU2=2070
+%term CNSTU4=4118
+%term CNSTU8=8214
+
+%term ARGB=41
+%term ARGF4=4129
+%term ARGF8=8225
+%term ARGF16=16417
+%term ARGI4=4133
+%term ARGI8=8229
+%term ARGP4=4135
+%term ARGP8=8231
+%term ARGU4=4134
+%term ARGU8=8230
+
+%term ASGNB=57
+%term ASGNF4=4145
+%term ASGNF8=8241
+%term ASGNF16=16433
+%term ASGNI1=1077
+%term ASGNI2=2101
+%term ASGNI4=4149
+%term ASGNI8=8245
+%term ASGNP4=4151
+%term ASGNP8=8247
+%term ASGNU1=1078
+%term ASGNU2=2102
+%term ASGNU4=4150
+%term ASGNU8=8246
+
+%term INDIRB=73
+%term INDIRF4=4161
+%term INDIRF8=8257
+%term INDIRF16=16449
+%term INDIRI1=1093
+%term INDIRI2=2117
+%term INDIRI4=4165
+%term INDIRI8=8261
+%term INDIRP4=4167
+%term INDIRP8=8263
+%term INDIRU1=1094
+%term INDIRU2=2118
+%term INDIRU4=4166
+%term INDIRU8=8262
+
+%term CVFF4=4209
+%term CVFF8=8305
+%term CVFF16=16497
+%term CVFI4=4213
+%term CVFI8=8309
+
+%term CVIF4=4225
+%term CVIF8=8321
+%term CVIF16=16513
+%term CVII1=1157
+%term CVII2=2181
+%term CVII4=4229
+%term CVII8=8325
+%term CVIU1=1158
+%term CVIU2=2182
+%term CVIU4=4230
+%term CVIU8=8326
+
+%term CVPP4=4247
+%term CVPP8=8343
+%term CVPP16=16535
+%term CVPU4=4246
+%term CVPU8=8342
+
+%term CVUI1=1205
+%term CVUI2=2229
+%term CVUI4=4277
+%term CVUI8=8373
+%term CVUP4=4279
+%term CVUP8=8375
+%term CVUP16=16567
+%term CVUU1=1206
+%term CVUU2=2230
+%term CVUU4=4278
+%term CVUU8=8374
+
+%term NEGF4=4289
+%term NEGF8=8385
+%term NEGF16=16577
+%term NEGI4=4293
+%term NEGI8=8389
+
+%term CALLB=217
+%term CALLF4=4305
+%term CALLF8=8401
+%term CALLF16=16593
+%term CALLI4=4309
+%term CALLI8=8405
+%term CALLP4=4311
+%term CALLP8=8407
+%term CALLU4=4310
+%term CALLU8=8406
+%term CALLV=216
+
+%term RETF4=4337
+%term RETF8=8433
+%term RETF16=16625
+%term RETI4=4341
+%term RETI8=8437
+%term RETP4=4343
+%term RETP8=8439
+%term RETU4=4342
+%term RETU8=8438
+%term RETV=248
+
+%term ADDRGP4=4359
+%term ADDRGP8=8455
+
+%term ADDRFP4=4375
+%term ADDRFP8=8471
+
+%term ADDRLP4=4391
+%term ADDRLP8=8487
+
+%term ADDF4=4401
+%term ADDF8=8497
+%term ADDF16=16689
+%term ADDI4=4405
+%term ADDI8=8501
+%term ADDP4=4407
+%term ADDP8=8503
+%term ADDU4=4406
+%term ADDU8=8502
+
+%term SUBF4=4417
+%term SUBF8=8513
+%term SUBF16=16705
+%term SUBI4=4421
+%term SUBI8=8517
+%term SUBP4=4423
+%term SUBP8=8519
+%term SUBU4=4422
+%term SUBU8=8518
+
+%term LSHI4=4437
+%term LSHI8=8533
+%term LSHU4=4438
+%term LSHU8=8534
+
+%term MODI4=4453
+%term MODI8=8549
+%term MODU4=4454
+%term MODU8=8550
+
+%term RSHI4=4469
+%term RSHI8=8565
+%term RSHU4=4470
+%term RSHU8=8566
+
+%term BANDI4=4485
+%term BANDI8=8581
+%term BANDU4=4486
+%term BANDU8=8582
+
+%term BCOMI4=4501
+%term BCOMI8=8597
+%term BCOMU4=4502
+%term BCOMU8=8598
+
+%term BORI4=4517
+%term BORI8=8613
+%term BORU4=4518
+%term BORU8=8614
+
+%term BXORI4=4533
+%term BXORI8=8629
+%term BXORU4=4534
+%term BXORU8=8630
+
+%term DIVF4=4545
+%term DIVF8=8641
+%term DIVF16=16833
+%term DIVI4=4549
+%term DIVI8=8645
+%term DIVU4=4550
+%term DIVU8=8646
+
+%term MULF4=4561
+%term MULF8=8657
+%term MULF16=16849
+%term MULI4=4565
+%term MULI8=8661
+%term MULU4=4566
+%term MULU8=8662
+
+%term EQF4=4577
+%term EQF8=8673
+%term EQF16=16865
+%term EQI4=4581
+%term EQI8=8677
+%term EQU4=4582
+%term EQU8=8678
+
+%term GEF4=4593
+%term GEF8=8689
+%term GEI4=4597
+%term GEI8=8693
+%term GEI16=16885
+%term GEU4=4598
+%term GEU8=8694
+
+%term GTF4=4609
+%term GTF8=8705
+%term GTF16=16897
+%term GTI4=4613
+%term GTI8=8709
+%term GTU4=4614
+%term GTU8=8710
+
+%term LEF4=4625
+%term LEF8=8721
+%term LEF16=16913
+%term LEI4=4629
+%term LEI8=8725
+%term LEU4=4630
+%term LEU8=8726
+
+%term LTF4=4641
+%term LTF8=8737
+%term LTF16=16929
+%term LTI4=4645
+%term LTI8=8741
+%term LTU4=4646
+%term LTU8=8742
+
+%term NEF4=4657
+%term NEF8=8753
+%term NEF16=16945
+%term NEI4=4661
+%term NEI8=8757
+%term NEU4=4662
+%term NEU8=8758
+
+%term JUMPV=584
+
+%term LABELV=600
+
+%term LOADB=233
+%term LOADF4=4321
+%term LOADF8=8417
+%term LOADF16=16609
+%term LOADI1=1253
+%term LOADI2=2277
+%term LOADI4=4325
+%term LOADI8=8421
+%term LOADP4=4327
+%term LOADP8=8423
+%term LOADU1=1254
+%term LOADU2=2278
+%term LOADU4=4326
+%term LOADU8=8422
+
+%term VREGP=711
+%%
+reg: INDIRI1(VREGP) "# read register\n"
+reg: INDIRU1(VREGP) "# read register\n"
+
+reg: INDIRI2(VREGP) "# read register\n"
+reg: INDIRU2(VREGP) "# read register\n"
+
+reg: INDIRF4(VREGP) "# read register\n"
+reg: INDIRI4(VREGP) "# read register\n"
+reg: INDIRP4(VREGP) "# read register\n"
+reg: INDIRU4(VREGP) "# read register\n"
+
+reg: INDIRF8(VREGP) "# read register\n"
+reg: INDIRI8(VREGP) "# read register\n"
+reg: INDIRP8(VREGP) "# read register\n"
+reg: INDIRU8(VREGP) "# read register\n"
+
+stmt: ASGNI1(VREGP,reg) "# write register\n"
+stmt: ASGNU1(VREGP,reg) "# write register\n"
+
+stmt: ASGNI2(VREGP,reg) "# write register\n"
+stmt: ASGNU2(VREGP,reg) "# write register\n"
+
+stmt: ASGNF4(VREGP,reg) "# write register\n"
+stmt: ASGNI4(VREGP,reg) "# write register\n"
+stmt: ASGNP4(VREGP,reg) "# write register\n"
+stmt: ASGNU4(VREGP,reg) "# write register\n"
+
+stmt: ASGNF8(VREGP,reg) "# write register\n"
+stmt: ASGNI8(VREGP,reg) "# write register\n"
+stmt: ASGNP8(VREGP,reg) "# write register\n"
+stmt: ASGNU8(VREGP,reg) "# write register\n"
+con: CNSTI1 "%a"
+con: CNSTU1 "%a"
+
+con: CNSTI2 "%a"
+con: CNSTU2 "%a"
+
+con: CNSTI4 "%a"
+con: CNSTU4 "%a"
+con: CNSTP4 "%a"
+
+con: CNSTI8 "%a"
+con: CNSTU8 "%a"
+con: CNSTP8 "%a"
+stmt: reg ""
+acon: ADDRGP4 "(%a)"
+acon: con "(%0)"
+base: ADDRGP4 "(%a)"
+base: reg "[%0]"
+base: ADDI4(reg,acon) "%1[%0]"
+base: ADDP4(reg,acon) "%1[%0]"
+base: ADDU4(reg,acon) "%1[%0]"
+base: ADDRFP4 "(%a)[ebp]"
+base: ADDRLP4 "(%a)[ebp]"
+index: reg "%0"
+index: LSHI4(reg,con1) "%0*2"
+index: LSHI4(reg,con2) "%0*4"
+index: LSHI4(reg,con3) "%0*8"
+
+con1: CNSTI4 "1" range(a, 1, 1)
+con1: CNSTU4 "1" range(a, 1, 1)
+con2: CNSTI4 "2" range(a, 2, 2)
+con2: CNSTU4 "2" range(a, 2, 2)
+con3: CNSTI4 "3" range(a, 3, 3)
+con3: CNSTU4 "3" range(a, 3, 3)
+index: LSHU4(reg,con1) "%0*2"
+index: LSHU4(reg,con2) "%0*4"
+index: LSHU4(reg,con3) "%0*8"
+addr: base "%0"
+addr: ADDI4(index,base) "%1[%0]"
+addr: ADDP4(index,base) "%1[%0]"
+addr: ADDU4(index,base) "%1[%0]"
+addr: index "[%0]"
+mem: INDIRI1(addr) "byte ptr %0"
+mem: INDIRI2(addr) "word ptr %0"
+mem: INDIRI4(addr) "dword ptr %0"
+mem: INDIRU1(addr) "byte ptr %0"
+mem: INDIRU2(addr) "word ptr %0"
+mem: INDIRU4(addr) "dword ptr %0"
+mem: INDIRP4(addr) "dword ptr %0"
+rc: reg "%0"
+rc: con "%0"
+
+mr: reg "%0"
+mr: mem "%0"
+
+mrc0: mem "%0"
+mrc0: rc "%0"
+mrc1: mem "%0" 1
+mrc1: rc "%0"
+
+mrc3: mem "%0" 3
+mrc3: rc "%0"
+reg: addr "lea %c,%0\n" 1
+reg: mrc0 "mov %c,%0\n" 1
+reg: LOADI1(reg) "# move\n" 1
+reg: LOADI2(reg) "# move\n" 1
+reg: LOADI4(reg) "# move\n" move(a)
+reg: LOADU1(reg) "# move\n" 1
+reg: LOADU2(reg) "# move\n" 1
+reg: LOADU4(reg) "# move\n" move(a)
+reg: LOADP4(reg) "# move\n" move(a)
+reg: ADDI4(reg,mrc1) "?mov %c,%0\nadd %c,%1\n" 1
+reg: ADDP4(reg,mrc1) "?mov %c,%0\nadd %c,%1\n" 1
+reg: ADDU4(reg,mrc1) "?mov %c,%0\nadd %c,%1\n" 1
+reg: SUBI4(reg,mrc1) "?mov %c,%0\nsub %c,%1\n" 1
+reg: SUBP4(reg,mrc1) "?mov %c,%0\nsub %c,%1\n" 1
+reg: SUBU4(reg,mrc1) "?mov %c,%0\nsub %c,%1\n" 1
+reg: BANDI4(reg,mrc1) "?mov %c,%0\nand %c,%1\n" 1
+reg: BORI4(reg,mrc1) "?mov %c,%0\nor %c,%1\n" 1
+reg: BXORI4(reg,mrc1) "?mov %c,%0\nxor %c,%1\n" 1
+reg: BANDU4(reg,mrc1) "?mov %c,%0\nand %c,%1\n" 1
+reg: BORU4(reg,mrc1) "?mov %c,%0\nor %c,%1\n" 1
+reg: BXORU4(reg,mrc1) "?mov %c,%0\nxor %c,%1\n" 1
+stmt: ASGNI4(addr,ADDI4(mem,con1)) "inc %1\n" memop(a)
+stmt: ASGNI4(addr,ADDU4(mem,con1)) "inc %1\n" memop(a)
+stmt: ASGNP4(addr,ADDP4(mem,con1)) "inc %1\n" memop(a)
+stmt: ASGNI4(addr,SUBI4(mem,con1)) "dec %1\n" memop(a)
+stmt: ASGNI4(addr,SUBU4(mem,con1)) "dec %1\n" memop(a)
+stmt: ASGNP4(addr,SUBP4(mem,con1)) "dec %1\n" memop(a)
+stmt: ASGNI4(addr,ADDI4(mem,rc)) "add %1,%2\n" memop(a)
+stmt: ASGNI4(addr,SUBI4(mem,rc)) "sub %1,%2\n" memop(a)
+stmt: ASGNU4(addr,ADDU4(mem,rc)) "add %1,%2\n" memop(a)
+stmt: ASGNU4(addr,SUBU4(mem,rc)) "sub %1,%2\n" memop(a)
+
+stmt: ASGNI4(addr,BANDI4(mem,rc)) "and %1,%2\n" memop(a)
+stmt: ASGNI4(addr,BORI4(mem,rc)) "or %1,%2\n" memop(a)
+stmt: ASGNI4(addr,BXORI4(mem,rc)) "xor %1,%2\n" memop(a)
+stmt: ASGNU4(addr,BANDU4(mem,rc)) "and %1,%2\n" memop(a)
+stmt: ASGNU4(addr,BORU4(mem,rc)) "or %1,%2\n" memop(a)
+stmt: ASGNU4(addr,BXORU4(mem,rc)) "xor %1,%2\n" memop(a)
+reg: BCOMI4(reg) "?mov %c,%0\nnot %c\n" 2
+reg: BCOMU4(reg) "?mov %c,%0\nnot %c\n" 2
+reg: NEGI4(reg) "?mov %c,%0\nneg %c\n" 2
+
+stmt: ASGNI4(addr,BCOMI4(mem)) "not %1\n" memop(a)
+stmt: ASGNU4(addr,BCOMU4(mem)) "not %1\n" memop(a)
+stmt: ASGNI4(addr,NEGI4(mem)) "neg %1\n" memop(a)
+reg: LSHI4(reg,con5) "?mov %c,%0\nsal %c,%1\n" 2
+reg: LSHU4(reg,con5) "?mov %c,%0\nshl %c,%1\n" 2
+reg: RSHI4(reg,con5) "?mov %c,%0\nsar %c,%1\n" 2
+reg: RSHU4(reg,con5) "?mov %c,%0\nshr %c,%1\n" 2
+
+stmt: ASGNI4(addr,LSHI4(mem,con5)) "sal %1,%2\n" memop(a)
+stmt: ASGNI4(addr,LSHU4(mem,con5)) "shl %1,%2\n" memop(a)
+stmt: ASGNI4(addr,RSHI4(mem,con5)) "sar %1,%2\n" memop(a)
+stmt: ASGNI4(addr,RSHU4(mem,con5)) "shr %1,%2\n" memop(a)
+
+con5: CNSTI4 "%a" range(a, 0, 31)
+
+reg: LSHI4(reg,reg) "?mov %c,%0\nmov ecx,%1\nsal %c,cl\n" 3
+reg: LSHU4(reg,reg) "?mov %c,%0\nmov ecx,%1\nshl %c,cl\n" 2
+reg: RSHI4(reg,reg) "?mov %c,%0\nmov ecx,%1\nsar %c,cl\n" 2
+reg: RSHU4(reg,reg) "?mov %c,%0\nmov ecx,%1\nshr %c,cl\n" 2
+reg: MULI4(reg,mrc3) "?mov %c,%0\nimul %c,%1\n" 14
+reg: MULI4(con,mr) "imul %c,%1,%0\n" 13
+reg: MULU4(reg,mr) "mul %1\n" 13
+reg: DIVU4(reg,reg) "xor edx,edx\ndiv %1\n"
+reg: MODU4(reg,reg) "xor edx,edx\ndiv %1\n"
+reg: DIVI4(reg,reg) "cdq\nidiv %1\n"
+reg: MODI4(reg,reg) "cdq\nidiv %1\n"
+reg: CVPU4(reg) "mov %c,%0\n" move(a)
+reg: CVUP4(reg) "mov %c,%0\n" move(a)
+reg: CVII4(INDIRI1(addr)) "movsx %c,byte ptr %0\n" 3
+reg: CVII4(INDIRI2(addr)) "movsx %c,word ptr %0\n" 3
+reg: CVUU4(INDIRU1(addr)) "movzx %c,byte ptr %0\n" 3
+reg: CVUU4(INDIRU2(addr)) "movzx %c,word ptr %0\n" 3
+reg: CVII4(reg) "# extend\n" 3
+reg: CVIU4(reg) "# extend\n" 3
+reg: CVUI4(reg) "# extend\n" 3
+reg: CVUU4(reg) "# extend\n" 3
+
+reg: CVII1(reg) "# truncate\n" 1
+reg: CVII2(reg) "# truncate\n" 1
+reg: CVUU1(reg) "# truncate\n" 1
+reg: CVUU2(reg) "# truncate\n" 1
+stmt: ASGNI1(addr,rc) "mov byte ptr %0,%1\n" 1
+stmt: ASGNI2(addr,rc) "mov word ptr %0,%1\n" 1
+stmt: ASGNI4(addr,rc) "mov dword ptr %0,%1\n" 1
+stmt: ASGNU1(addr,rc) "mov byte ptr %0,%1\n" 1
+stmt: ASGNU2(addr,rc) "mov word ptr %0,%1\n" 1
+stmt: ASGNU4(addr,rc) "mov dword ptr %0,%1\n" 1
+stmt: ASGNP4(addr,rc) "mov dword ptr %0,%1\n" 1
+stmt: ARGI4(mrc3) "push %0\n" 1
+stmt: ARGU4(mrc3) "push %0\n" 1
+stmt: ARGP4(mrc3) "push %0\n" 1
+stmt: ASGNB(reg,INDIRB(reg)) "mov ecx,%a\nrep movsb\n"
+stmt: ARGB(INDIRB(reg)) "sub esp,%a\nmov edi,esp\nmov ecx,%a\nrep movsb\n"
+
+memf: INDIRF8(addr) "qword ptr %0"
+memf: INDIRF4(addr) "dword ptr %0"
+memf: CVFF8(INDIRF4(addr)) "dword ptr %0"
+reg: memf "fld %0\n" 3
+stmt: ASGNF8(addr,reg) "fstp qword ptr %0\n" 7
+stmt: ASGNF4(addr,reg) "fstp dword ptr %0\n" 7
+stmt: ASGNF4(addr,CVFF4(reg)) "fstp dword ptr %0\n" 7
+stmt: ARGF8(reg) "sub esp,8\nfstp qword ptr [esp]\n"
+stmt: ARGF4(reg) "sub esp,4\nfstp dword ptr [esp]\n"
+reg: NEGF8(reg) "fchs\n"
+reg: NEGF4(reg) "fchs\n"
+flt: memf " %0"
+flt: reg "p st(1),st"
+reg: ADDF8(reg,flt) "fadd%1\n"
+reg: ADDF4(reg,flt) "fadd%1\n"
+reg: DIVF8(reg,flt) "fdiv%1\n"
+reg: DIVF4(reg,flt) "fdiv%1\n"
+reg: MULF8(reg,flt) "fmul%1\n"
+reg: MULF4(reg,flt) "fmul%1\n"
+reg: SUBF8(reg,flt) "fsub%1\n"
+reg: SUBF4(reg,flt) "fsub%1\n"
+reg: CVFF8(reg) "# CVFF8\n"
+reg: CVFF4(reg) "sub esp,4\nfstp dword ptr 0[esp]\nfld dword ptr 0[esp]\nadd esp,4\n" 12
+
+reg: CVFI4(reg) "call __ftol\n" 31
+reg: CVIF8(INDIRI4(addr)) "fild dword ptr %0\n" 10
+reg: CVIF4(reg) "push %0\nfild dword ptr 0[esp]\nadd esp,4\n" 12
+
+reg: CVIF8(reg) "push %0\nfild dword ptr 0[esp]\nadd esp,4\n" 12
+
+addrj: ADDRGP4 "%a"
+addrj: reg "%0" 2
+addrj: mem "%0" 2
+
+stmt: JUMPV(addrj) "jmp %0\n" 3
+stmt: LABELV "%a:\n"
+stmt: EQI4(mem,rc) "cmp %0,%1\nje %a\n" 5
+stmt: GEI4(mem,rc) "cmp %0,%1\njge %a\n" 5
+stmt: GTI4(mem,rc) "cmp %0,%1\njg %a\n" 5
+stmt: LEI4(mem,rc) "cmp %0,%1\njle %a\n" 5
+stmt: LTI4(mem,rc) "cmp %0,%1\njl %a\n" 5
+stmt: NEI4(mem,rc) "cmp %0,%1\njne %a\n" 5
+stmt: GEU4(mem,rc) "cmp %0,%1\njae %a\n" 5
+stmt: GTU4(mem,rc) "cmp %0,%1\nja %a\n" 5
+stmt: LEU4(mem,rc) "cmp %0,%1\njbe %a\n" 5
+stmt: LTU4(mem,rc) "cmp %0,%1\njb %a\n" 5
+stmt: EQI4(reg,mrc1) "cmp %0,%1\nje %a\n" 4
+stmt: GEI4(reg,mrc1) "cmp %0,%1\njge %a\n" 4
+stmt: GTI4(reg,mrc1) "cmp %0,%1\njg %a\n" 4
+stmt: LEI4(reg,mrc1) "cmp %0,%1\njle %a\n" 4
+stmt: LTI4(reg,mrc1) "cmp %0,%1\njl %a\n" 4
+stmt: NEI4(reg,mrc1) "cmp %0,%1\njne %a\n" 4
+
+stmt: EQU4(reg,mrc1) "cmp %0,%1\nje %a\n" 4
+stmt: GEU4(reg,mrc1) "cmp %0,%1\njae %a\n" 4
+stmt: GTU4(reg,mrc1) "cmp %0,%1\nja %a\n" 4
+stmt: LEU4(reg,mrc1) "cmp %0,%1\njbe %a\n" 4
+stmt: LTU4(reg,mrc1) "cmp %0,%1\njb %a\n" 4
+stmt: NEU4(reg,mrc1) "cmp %0,%1\njne %a\n" 4
+cmpf: memf " %0"
+cmpf: reg "p"
+stmt: EQF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\nje %a\n"
+stmt: GEF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njbe %a\n"
+stmt: GTF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njb %a\n"
+stmt: LEF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njae %a\n"
+stmt: LTF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\nja %a\n"
+stmt: NEF8(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njne %a\n"
+
+stmt: EQF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\nje %a\n"
+stmt: GEF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njbe %a\n"
+stmt: GTF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njb %a\n"
+stmt: LEF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njae %a\n"
+stmt: LTF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\nja %a\n"
+stmt: NEF4(cmpf,reg) "fcomp%0\nfstsw ax\nsahf\njne %a\n"
+reg: CALLI4(addrj) "call %0\nadd esp,%a\n"
+reg: CALLU4(addrj) "call %0\nadd esp,%a\n"
+reg: CALLP4(addrj) "call %0\nadd esp,%a\n"
+stmt: CALLV(addrj) "call %0\nadd esp,%a\n"
+reg: CALLF4(addrj) "call %0\nadd esp,%a\n"
+reg: CALLF8(addrj) "call %0\nadd esp,%a\n"
+stmt: CALLF4(addrj) "call %0\nadd esp,%a\nfstp\n"
+stmt: CALLF8(addrj) "call %0\nadd esp,%a\nfstp\n"
+
+stmt: RETI4(reg) "# ret\n"
+stmt: RETU4(reg) "# ret\n"
+stmt: RETP4(reg) "# ret\n"
+stmt: RETF4(reg) "# ret\n"
+stmt: RETF8(reg) "# ret\n"
+%%
+static void progbeg(int argc, char *argv[]) {
+ int i;
+
+ {
+ union {
+ char c;
+ int i;
+ } u;
+ u.i = 0;
+ u.c = 1;
+ swap = ((int)(u.i == 1)) != IR->little_endian;
+ }
+ parseflags(argc, argv);
+ intreg[EAX] = mkreg("eax", EAX, 1, IREG);
+ intreg[EDX] = mkreg("edx", EDX, 1, IREG);
+ intreg[ECX] = mkreg("ecx", ECX, 1, IREG);
+ intreg[EBX] = mkreg("ebx", EBX, 1, IREG);
+ intreg[ESI] = mkreg("esi", ESI, 1, IREG);
+ intreg[EDI] = mkreg("edi", EDI, 1, IREG);
+
+ shortreg[EAX] = mkreg("ax", EAX, 1, IREG);
+ shortreg[ECX] = mkreg("cx", ECX, 1, IREG);
+ shortreg[EDX] = mkreg("dx", EDX, 1, IREG);
+ shortreg[EBX] = mkreg("bx", EBX, 1, IREG);
+ shortreg[ESI] = mkreg("si", ESI, 1, IREG);
+ shortreg[EDI] = mkreg("di", EDI, 1, IREG);
+
+ charreg[EAX] = mkreg("al", EAX, 1, IREG);
+ charreg[ECX] = mkreg("cl", ECX, 1, IREG);
+ charreg[EDX] = mkreg("dl", EDX, 1, IREG);
+ charreg[EBX] = mkreg("bl", EBX, 1, IREG);
+ for (i = 0; i < 8; i++)
+ fltreg[i] = mkreg("%d", i, 0, FREG);
+ charregw = mkwildcard(charreg);
+ shortregw = mkwildcard(shortreg);
+ intregw = mkwildcard(intreg);
+ fltregw = mkwildcard(fltreg);
+
+ tmask[IREG] = (1<<EDI) | (1<<ESI) | (1<<EBX)
+ | (1<<EDX) | (1<<ECX) | (1<<EAX);
+ vmask[IREG] = 0;
+ tmask[FREG] = 0xff;
+ vmask[FREG] = 0;
+ print(".486\n");
+ print(".model flat\n");
+ print("extrn __fltused:near\n");
+ print("extrn __ftol:near\n");
+ cseg = 0;
+ quo = mkreg("eax", EAX, 1, IREG);
+ quo->x.regnode->mask |= 1<<EDX;
+ rem = mkreg("edx", EDX, 1, IREG);
+ rem->x.regnode->mask |= 1<<EAX;
+}
+static Symbol rmap(int opk) {
+ switch (optype(opk)) {
+ case B: case P:
+ return intregw;
+ case I: case U:
+ if (opsize(opk) == 1)
+ return charregw;
+ else if (opsize(opk) == 2)
+ return shortregw;
+ else
+ return intregw;
+ case F:
+ return fltregw;
+ default:
+ return 0;
+ }
+}
+static void segment(int n) {
+ if (n == cseg)
+ return;
+ if (cseg == CODE || cseg == LIT)
+ print("_TEXT ends\n");
+ else if (cseg == DATA || cseg == BSS)
+ print("_DATA ends\n");
+ cseg = n;
+ if (cseg == CODE || cseg == LIT)
+ print("_TEXT segment\n");
+ else if (cseg == DATA || cseg == BSS)
+ print("_DATA segment\n");
+}
+static void progend(void) {
+ segment(0);
+ print("end\n");
+}
+static void target(Node p) {
+ assert(p);
+ switch (specific(p->op)) {
+ case MUL+U:
+ setreg(p, quo);
+ rtarget(p, 0, intreg[EAX]);
+ break;
+ case DIV+I: case DIV+U:
+ setreg(p, quo);
+ rtarget(p, 0, quo);
+ break;
+ case MOD+I: case MOD+U:
+ setreg(p, rem);
+ rtarget(p, 0, quo);
+ break;
+ case ASGN+B:
+ rtarget(p, 0, intreg[EDI]);
+ rtarget(p->kids[1], 0, intreg[ESI]);
+ break;
+ case ARG+B:
+ rtarget(p->kids[0], 0, intreg[ESI]);
+ break;
+ case CVF+I:
+ setreg(p, intreg[EAX]);
+ break;
+ case CALL+I: case CALL+U: case CALL+P: case CALL+V:
+ setreg(p, intreg[EAX]);
+ break;
+ case RET+I: case RET+U: case RET+P:
+ rtarget(p, 0, intreg[EAX]);
+ break;
+ }
+}
+
+static void clobber(Node p) {
+ static int nstack = 0;
+
+ assert(p);
+ nstack = ckstack(p, nstack);
+ switch (specific(p->op)) {
+ case RSH+I: case RSH+U: case LSH+I: case LSH+U:
+ if (generic(p->kids[1]->op) != CNST
+ && !( generic(p->kids[1]->op) == INDIR
+ && specific(p->kids[1]->kids[0]->op) == VREG+P
+ && p->kids[1]->syms[RX]->u.t.cse
+ && generic(p->kids[1]->syms[RX]->u.t.cse->op) == CNST
+)) {
+ spill(1<<ECX, 1, p);
+ }
+ break;
+ case ASGN+B: case ARG+B:
+ spill(1<<ECX | 1<<ESI | 1<<EDI, IREG, p);
+ break;
+ case EQ+F: case LE+F: case GE+F: case LT+F: case GT+F: case NE+F:
+ spill(1<<EAX, IREG, p);
+ break;
+ case CALL+F:
+ spill(1<<EDX | 1<<EAX | 1<<ECX, IREG, p);
+ break;
+ case CALL+I: case CALL+U: case CALL+P: case CALL+V:
+ spill(1<<EDX | 1<<ECX, IREG, p);
+ break;
+ }
+}
+#define isfp(p) (optype((p)->op)==F)
+
+int ckstack(Node p, int n) {
+ int i;
+
+ for (i = 0; i < NELEMS(p->x.kids) && p->x.kids[i]; i++)
+ if (isfp(p->x.kids[i]))
+ n--;
+ if (isfp(p) && p->count > 0)
+ n++;
+ if (n > 8)
+ error("expression too complicated\n");
+ debug(fprint(stderr, "(ckstack(%x)=%d)\n", p, n));
+ assert(n >= 0);
+ return n;
+}
+int memop(Node p) {
+ assert(p);
+ assert(generic(p->op) == ASGN);
+ assert(p->kids[0]);
+ assert(p->kids[1]);
+ if (generic(p->kids[1]->kids[0]->op) == INDIR
+ && sametree(p->kids[0], p->kids[1]->kids[0]->kids[0]))
+ return 3;
+ else
+ return LBURG_MAX;
+}
+int sametree(Node p, Node q) {
+ return p == NULL && q == NULL
+ || p && q && p->op == q->op && p->syms[0] == q->syms[0]
+ && sametree(p->kids[0], q->kids[0])
+ && sametree(p->kids[1], q->kids[1]);
+}
+static void emit2(Node p) {
+ int op = specific(p->op);
+#define preg(f) ((f)[getregnum(p->x.kids[0])]->x.name)
+
+ if (op == CVI+I && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 1)
+ print("movsx %s,%s\n", p->syms[RX]->x.name
+, preg(charreg));
+ else if (op == CVI+U && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 1)
+ print("movsx %s,%s\n", p->syms[RX]->x.name
+, preg(charreg));
+ else if (op == CVI+I && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 2)
+ print("movsx %s,%s\n", p->syms[RX]->x.name
+, preg(shortreg));
+ else if (op == CVI+U && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 2)
+ print("movsx %s,%s\n", p->syms[RX]->x.name
+, preg(shortreg));
+
+ else if (op == CVU+I && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 1)
+ print("movzx %s,%s\n", p->syms[RX]->x.name
+, preg(charreg));
+ else if (op == CVU+U && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 1)
+ print("movzx %s,%s\n", p->syms[RX]->x.name
+, preg(charreg));
+ else if (op == CVU+I && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 2)
+ print("movzx %s,%s\n", p->syms[RX]->x.name
+, preg(shortreg));
+ else if (op == CVU+U && opsize(p->op) == 4 && opsize(p->x.kids[0]->op) == 2)
+ print("movzx %s,%s\n", p->syms[RX]->x.name
+, preg(shortreg));
+ else if (generic(op) == CVI || generic(op) == CVU || generic(op) == LOAD) {
+ char *dst = intreg[getregnum(p)]->x.name;
+ char *src = preg(intreg);
+ assert(opsize(p->op) <= opsize(p->x.kids[0]->op));
+ if (dst != src)
+ print("mov %s,%s\n", dst, src);
+ }
+}
+
+static void doarg(Node p) {
+ assert(p && p->syms[0]);
+ mkactual(4, p->syms[0]->u.c.v.i);
+}
+static void blkfetch(int k, int off, int reg, int tmp) {}
+static void blkstore(int k, int off, int reg, int tmp) {}
+static void blkloop(int dreg, int doff, int sreg, int soff,
+ int size, int tmps[]) {}
+static void local(Symbol p) {
+ if (isfloat(p->type))
+ p->sclass = AUTO;
+ if (askregvar(p, (*IR->x.rmap)(ttob(p->type))) == 0)
+ mkauto(p);
+}
+static void function(Symbol f, Symbol caller[], Symbol callee[], int n) {
+ int i;
+
+ print("%s:\n", f->x.name);
+ print("push ebx\n");
+ print("push esi\n");
+ print("push edi\n");
+ print("push ebp\n");
+ print("mov ebp,esp\n");
+ usedmask[0] = usedmask[1] = 0;
+ freemask[0] = freemask[1] = ~(unsigned)0;
+ offset = 16 + 4;
+ for (i = 0; callee[i]; i++) {
+ Symbol p = callee[i];
+ Symbol q = caller[i];
+ assert(q);
+ p->x.offset = q->x.offset = offset;
+ p->x.name = q->x.name = stringf("%d", p->x.offset);
+ p->sclass = q->sclass = AUTO;
+ offset += roundup(q->type->size, 4);
+ }
+ assert(caller[i] == 0);
+ offset = maxoffset = 0;
+ gencode(caller, callee);
+ framesize = roundup(maxoffset, 4);
+ if (framesize > 0)
+ print("sub esp,%d\n", framesize);
+ emitcode();
+ print("mov esp,ebp\n");
+ print("pop ebp\n");
+ print("pop edi\n");
+ print("pop esi\n");
+ print("pop ebx\n");
+ print("ret\n");
+}
+static void defsymbol(Symbol p) {
+ if (p->scope >= LOCAL && p->sclass == STATIC)
+ p->x.name = stringf("L%d", genlabel(1));
+ else if (p->generated)
+ p->x.name = stringf("L%s", p->name);
+ else if (p->scope == GLOBAL || p->sclass == EXTERN)
+ p->x.name = stringf("_%s", p->name);
+ else if (p->scope == CONSTANTS
+ && (isint(p->type) || isptr(p->type))
+ && p->name[0] == '0' && p->name[1] == 'x')
+ p->x.name = stringf("0%sH", &p->name[2]);
+ else
+ p->x.name = p->name;
+}
+static void address(Symbol q, Symbol p, long n) {
+ if (p->scope == GLOBAL
+ || p->sclass == STATIC || p->sclass == EXTERN)
+ q->x.name = stringf("%s%s%D",
+ p->x.name, n >= 0 ? "+" : "", n);
+ else {
+ assert(n <= INT_MAX && n >= INT_MIN);
+ q->x.offset = p->x.offset + n;
+ q->x.name = stringd(q->x.offset);
+ }
+}
+static void defconst(int suffix, int size, Value v) {
+ if (suffix == I && size == 1)
+ print("db %d\n", v.u);
+ else if (suffix == I && size == 2)
+ print("dw %d\n", v.i);
+ else if (suffix == I && size == 4)
+ print("dd %d\n", v.i);
+ else if (suffix == U && size == 1)
+ print("db 0%xH\n", v.u);
+ else if (suffix == U && size == 2)
+ print("dw 0%xH\n", v.u);
+ else if (suffix == U && size == 4)
+ print("dd 0%xH\n", v.u);
+ else if (suffix == P && size == 4)
+ print("dd 0%xH\n", v.p);
+ else if (suffix == F && size == 4) {
+ float f = v.d;
+ print("dd 0%xH\n", *(unsigned *)&f);
+ }
+ else if (suffix == F && size == 8) {
+ double d = v.d;
+ unsigned *p = (unsigned *)&d;
+ print("dd 0%xH\ndd 0%xH\n", p[swap], p[!swap]);
+ }
+ else assert(0);
+}
+static void defaddress(Symbol p) {
+ print("dd %s\n", p->x.name);
+}
+static void defstring(int n, char *str) {
+ char *s;
+
+ for (s = str; s < str + n; s++)
+ print("db %d\n", (*s)&0377);
+}
+static void export(Symbol p) {
+ print("public %s\n", p->x.name);
+}
+static void import(Symbol p) {
+ int oldseg = cseg;
+
+ if (p->ref > 0) {
+ segment(0);
+ print("extrn %s:near\n", p->x.name);
+ segment(oldseg);
+ }
+}
+static void global(Symbol p) {
+ print("align %d\n",
+ p->type->align > 4 ? 4 : p->type->align);
+ print("%s label byte\n", p->x.name);
+ if (p->u.seg == BSS)
+ print("db %d dup (0)\n", p->type->size);
+}
+static void space(int n) {
+ if (cseg != BSS)
+ print("db %d dup (0)\n", n);
+}
+Interface x86IR = {
+ 1, 1, 0, /* char */
+ 2, 2, 0, /* short */
+ 4, 4, 0, /* int */
+ 4, 4, 0, /* long */
+ 4, 4, 0, /* long long */
+ 4, 4, 1, /* float */
+ 8, 4, 1, /* double */
+ 8, 4, 1, /* long double */
+ 4, 4, 0, /* T * */
+ 0, 4, 0, /* struct; so that ARGB keeps stack aligned */
+ 1, /* little_endian */
+ 0, /* mulops_calls */
+ 0, /* wants_callb */
+ 1, /* wants_argb */
+ 0, /* left_to_right */
+ 0, /* wants_dag */
+ 0, /* unsigned_char */
+ address,
+ blockbeg,
+ blockend,
+ defaddress,
+ defconst,
+ defstring,
+ defsymbol,
+ emit,
+ export,
+ function,
+ gen,
+ global,
+ import,
+ local,
+ progbeg,
+ progend,
+ segment,
+ space,
+ 0, 0, 0, 0, 0, 0, 0,
+ {1, rmap,
+ blkfetch, blkstore, blkloop,
+ _label,
+ _rule,
+ _nts,
+ _kids,
+ _string,
+ _templates,
+ _isinstruction,
+ _ntname,
+ emit2,
+ doarg,
+ target,
+ clobber,
+}
+};
+static char rcsid[] = "$Id: x86.md 145 2001-10-17 21:53:10Z timo $";
generated by cgit v1.2.3 (git 2.39.1) at 2025-08-09 00:20:12 +0000