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freebsd-ports/lang/lcc/files/FreeBSD.md
David E. O'Brien a7ed5d35e0 lcc is the retargetable ANSI C compiler described in the book 
`A Retargetable C Compiler: Design and Implementation'
(Addison-Wesley, 1995, ISBN 0-8053-1670-1).

lcc is a production compiler with a hand crafted lexical analyzer and a
hand-coded recursive decent parser.  The lexer and parser code is well
written and very easy to read (and learn from :-)).

lcc compiles much faster than FreeBSD's stock [gcc] compiler.  However, it
does not under stand FreeBSD's "long long" data type.

Contributions by:	Soren Schmidt
1996-12-27 11:09:49 +00:00

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%{
#define FREEBSDMD_RCSID "$Id$"
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 ARGS((Symbol, Symbol, int));
static void blkfetch ARGS((int, int, int, int));
static void blkloop ARGS((int, int, int, int, int, int[]));
static void blkstore ARGS((int, int, int, int));
static int ckstack ARGS((Node, int));
static void defaddress ARGS((Symbol));
static void defconst ARGS((int, Value));
static void defstring ARGS((int, char *));
static void defsymbol ARGS((Symbol));
static void doarg ARGS((Node));
static void emit0 ARGS((Node));
static void emit2 ARGS((Node));
static void export ARGS((Symbol));
static void clobber ARGS((Node));
static void function ARGS((Symbol, Symbol [], Symbol [], int));
static void global ARGS((Symbol));
static void import ARGS((Symbol));
static void local ARGS((Symbol));
static void progbeg ARGS((int, char **));
static void progend ARGS((void));
static void segment ARGS((int));
static void space ARGS((int));
static void target ARGS((Node));
static int memop ARGS((Node));
static int hasargs ARGS((Node));
static int sametree ARGS((Node, Node));
static Symbol charreg[32], shortreg[32], intreg[32];
static Symbol fltreg[32];
static int cseg;
static Symbol quo, rem;
%}
%start stmt
%term ADDD=306 ADDF=305 ADDI=309 ADDP=311 ADDU=310
%term ADDRFP=279
%term ADDRGP=263
%term ADDRLP=295
%term ARGB=41 ARGD=34 ARGF=33 ARGI=37 ARGP=39
%term ASGNB=57 ASGNC=51 ASGND=50 ASGNF=49 ASGNI=53 ASGNP=55 ASGNS=52
%term BANDU=390
%term BCOMU=406
%term BORU=422
%term BXORU=438
%term CALLB=217 CALLD=210 CALLF=209 CALLI=213 CALLV=216
%term CNSTC=19 CNSTD=18 CNSTF=17 CNSTI=21 CNSTP=23 CNSTS=20 CNSTU=22
%term CVCI=85 CVCU=86
%term CVDF=97 CVDI=101
%term CVFD=114
%term CVIC=131 CVID=130 CVIS=132 CVIU=134
%term CVPU=150
%term CVSI=165 CVSU=166
%term CVUC=179 CVUI=181 CVUP=183 CVUS=180
%term DIVD=450 DIVF=449 DIVI=453 DIVU=454
%term EQD=482 EQF=481 EQI=485
%term GED=498 GEF=497 GEI=501 GEU=502
%term GTD=514 GTF=513 GTI=517 GTU=518
%term INDIRB=73 INDIRC=67 INDIRD=66 INDIRF=65 INDIRI=69 INDIRP=71 INDIRS=68
%term JUMPV=584
%term LABELV=600
%term LED=530 LEF=529 LEI=533 LEU=534
%term LOADB=233 LOADC=227 LOADD=226 LOADF=225 LOADI=229 LOADP=231 LOADS=228 LOADU=230
%term LSHI=341 LSHU=342
%term LTD=546 LTF=545 LTI=549 LTU=550
%term MODI=357 MODU=358
%term MULD=466 MULF=465 MULI=469 MULU=470
%term NED=562 NEF=561 NEI=565
%term NEGD=194 NEGF=193 NEGI=197
%term RETD=242 RETF=241 RETI=245
%term RSHI=373 RSHU=374
%term SUBD=322 SUBF=321 SUBI=325 SUBP=327 SUBU=326
%term VREGP=615
%%
reg: INDIRC(VREGP) "# read register\n"
reg: INDIRI(VREGP) "# read register\n"
reg: INDIRP(VREGP) "# read register\n"
reg: INDIRS(VREGP) "# read register\n"
freg: INDIRD(VREGP) "# read register\n"
freg: INDIRF(VREGP) "# read register\n"
stmt: ASGNC(VREGP,reg) "# write register\n"
stmt: ASGNI(VREGP,reg) "# write register\n"
stmt: ASGNP(VREGP,reg) "# write register\n"
stmt: ASGNS(VREGP,reg) "# write register\n"
stmt: ASGND(VREGP,freg) "# write register\n"
stmt: ASGNF(VREGP,freg) "# write register\n"
con: CNSTC "$%a"
con: CNSTI "$%a"
con: CNSTP "$%a"
con: CNSTS "$%a"
con: CNSTU "$%a"
stmt: reg ""
stmt: freg ""
reg: CVIU(reg) "%0" notarget(a)
reg: CVPU(reg) "%0" notarget(a)
reg: CVUI(reg) "%0" notarget(a)
reg: CVUP(reg) "%0" notarget(a)
acon: ADDRGP "%a"
acon: CNSTC "%a"
acon: CNSTI "%a"
acon: CNSTP "%a"
acon: CNSTS "%a"
acon: CNSTU "%a"
baseaddr: ADDRGP "%a"
base: reg "(%0)"
base: ADDI(reg,acon) "%1(%0)"
base: ADDP(reg,acon) "%1(%0)"
base: ADDU(reg,acon) "%1(%0)"
base: ADDRFP "%a(%%ebp)"
base: ADDRLP "%a(%%ebp)"
con1: CNSTI "1" range(a, 1, 1)
con1: CNSTU "1" range(a, 1, 1)
icon: CNSTI "2" range(a, 1, 1)
icon: CNSTU "2" range(a, 1, 1)
icon: CNSTI "4" range(a, 2, 2)
icon: CNSTU "4" range(a, 2, 2)
icon: CNSTI "8" range(a, 3, 3)
icon: CNSTU "8" range(a, 3, 3)
index: reg "%0"
index: LSHI(reg,icon) "%0,%1"
index: LSHU(reg,icon) "%0,%1"
addr: base "%0" 1
addr: baseaddr "%0"
addr: ADDI(index,baseaddr) "%1(,%0)"
addr: ADDI(reg,baseaddr) "%1(%0)"
addr: ADDI(index,reg) "(%1,%0)"
addr: ADDP(index,baseaddr) "%1(,%0)"
addr: ADDP(reg,baseaddr) "%1(%0)"
addr: ADDP(index,reg) "(%1,%0)"
addr: ADDU(index,baseaddr) "%1(,%0)"
addr: ADDU(reg,baseaddr) "%1(%0)"
addr: ADDU(index,reg) "(%1,%0)"
addr: index "(,%0)"
memb: INDIRC(addr) "%0"
memw: INDIRS(addr) "%0"
mem: INDIRI(addr) "%0"
mem: INDIRP(addr) "%0"
rc5: CNSTI "$%a" range(a, 0, 31)
rc5: reg "%%cl"
rc: reg "%0"
rc: con "%0"
mr: reg "%0"
mr: mem "%0"
mrb: reg "%0"
mrb: memb "%0"
mrw: reg "%0"
mrw: memw "%0"
mrc: mem "%0" 1
mrc: memb "%0" 1
mrc: memw "%0" 1
mrc: rc "%0"
reg: addr "\tleal\t%0,%c\n" 1
reg: mr "\tmovl\t%0,%c\n" 1
reg: mrb "\tmovb\t%0,%c\n" 1
reg: mrw "\tmovw\t%0,%c\n" 1
reg: con "\tmovl\t%0,%c\n" 1
reg: LOADC(reg) "\tmovb\t%0,%c\n" move(a)
reg: LOADI(reg) "\tmovl\t%0,%c\n" move(a)
reg: LOADP(reg) "\tmovl\t%0,%c\n" move(a)
reg: LOADS(reg) "\tmovw\t%0,%c\n" move(a)
reg: LOADU(reg) "\tmovl\t%0,%c\n" move(a)
reg: ADDI(reg,mrc) "?\tmovl\t%0,%c\n\taddl\t%1,%c\n" 1
reg: ADDP(reg,mrc) "?\tmovl\t%0,%c\n\taddl\t%1,%c\n" 1
reg: ADDU(reg,mrc) "?\tmovl\t%0,%c\n\taddl\t%1,%c\n" 1
reg: SUBI(reg,mrc) "?\tmovl\t%0,%c\n\tsubl\t%1,%c\n" 1
reg: SUBP(reg,mrc) "?\tmovl\t%0,%c\n\tsubl\t%1,%c\n" 1
reg: SUBU(reg,mrc) "?\tmovl\t%0,%c\n\tsubl\t%1,%c\n" 1
reg: BANDU(reg,mrc) "?\tmovl\t%0,%c\n\tandl\t%1,%c\n" 1
reg: BORU(reg,mrc) "?\tmovl\t%0,%c\n\torl\t%1,%c\n" 1
reg: BXORU(reg,mrc) "?\tmovl\t%0,%c\n\txorl\t%1,%c\n" 1
reg: LSHI(reg,rc5) "?\tmovl\t%0,%c\n\tsall\t%1,%c\n" 2
reg: LSHU(reg,rc5) "?\tmovl\t%0,%c\n\tshll\t%1,%c\n" 2
reg: RSHI(reg,rc5) "?\tmovl\t%0,%c\n\tsarl\t%1,%c\n" 2
reg: RSHU(reg,rc5) "?\tmovl\t%0,%c\n\tshrl\t%1,%c\n" 2
reg: BCOMU(reg) "?\tmovl\t%0,%c\n\tnotl\t%c\n" 2
reg: NEGI(reg) "?\tmovl\t%0,%c\n\tnegl\t%c\n" 2
stmt: ASGNI(addr,ADDI(mem,con1)) "\tincl\t%1\n" memop(a)
stmt: ASGNI(addr,ADDU(mem,con1)) "\tincl\t%1\n" memop(a)
stmt: ASGNP(addr,ADDP(mem,con1)) "\tincl\t%1\n" memop(a)
stmt: ASGNI(addr,SUBI(mem,con1)) "\tdecl\t%1\n" memop(a)
stmt: ASGNI(addr,SUBU(mem,con1)) "\tdecl\t%1\n" memop(a)
stmt: ASGNP(addr,SUBP(mem,con1))"\tdecl\t%1\n" memop(a)
stmt: ASGNI(addr,ADDI(mem,rc)) "\taddl\t%2,%1\n" memop(a)
stmt: ASGNI(addr,ADDU(mem,rc)) "\taddl\t%2,%1\n" memop(a)
stmt: ASGNI(addr,SUBI(mem,rc)) "\tsubl\t%2,%1\n" memop(a)
stmt: ASGNI(addr,SUBU(mem,rc)) "\tsubl\t%2,%1\n" memop(a)
stmt: ASGNI(addr,BANDU(mem,rc)) "\tandl\t%2,%1\n" memop(a)
stmt: ASGNI(addr,BORU(mem,rc)) "\torl\t%2,%1\n" memop(a)
stmt: ASGNI(addr,BXORU(mem,rc)) "\txorl\t%2,%1\n" memop(a)
stmt: ASGNI(addr,BCOMU(mem)) "\tnotl\t%1\n" memop(a)
stmt: ASGNI(addr,NEGI(mem)) "\tnegl\t%1\n" memop(a)
stmt: ASGNI(addr,LSHI(mem,rc5)) "\tsall\t%2,%1\n" memop(a)
stmt: ASGNI(addr,LSHU(mem,rc5)) "\tshll\t%2,%1\n" memop(a)
stmt: ASGNI(addr,RSHI(mem,rc5)) "\tsarl\t%2,%1\n" memop(a)
stmt: ASGNI(addr,RSHU(mem,rc5)) "\tshrl\t%2,%1\n" memop(a)
reg: MULI(reg,mrc) "?\tmovl\t%0,%c\n\timull\t%1,%c\n" 14
reg: MULI(con,mr) "\timul\t%0,%1,%c\n" 13
reg: MULU(reg,mr) "\tmull\t%1\n" 13
reg: DIVU(reg,reg) "\txorl\t%%edx,%%edx\n\tdivl\t%1\n"
reg: MODU(reg,reg) "\txorl\t%%edx,%%edx\n\tdivl\t%1\n"
reg: DIVI(reg,reg) "\tcdq\n\tidivl\t%1\n"
reg: MODI(reg,reg) "\tcdq\n\tidivl\t%1\n"
reg: CVIU(reg) "\tmovl\t%0,%c\n" move(a)
reg: CVPU(reg) "\tmovl\t%0,%c\n" move(a)
reg: CVUI(reg) "\tmovl\t%0,%c\n" move(a)
reg: CVUP(reg) "\tmovl\t%0,%c\n" move(a)
reg: CVCI(INDIRC(addr)) "\tmovsbl\t%0,%c\n" 3
reg: CVCU(INDIRC(addr)) "\tmovzbl\t%0,%c\n" 3
reg: CVSI(INDIRS(addr)) "\tmovswl\t%0,%c\n" 3
reg: CVSU(INDIRS(addr)) "\tmovzwl\t%0,%c\n" 3
reg: CVCI(reg) "# extend\n" 3
reg: CVCU(reg) "# extend\n" 3
reg: CVSI(reg) "# extend\n" 3
reg: CVSU(reg) "# extend\n" 3
reg: CVIC(reg) "# truncate\n" 1
reg: CVIS(reg) "# truncate\n" 1
reg: CVUC(reg) "# truncate\n" 1
reg: CVUS(reg) "# truncate\n" 1
mrca: mem "%0"
mrca: rc "%0"
mrca: ADDRGP "$%a"
stmt: ASGNC(addr,rc) "\tmovb\t%1,%0\n" 1
stmt: ASGNI(addr,rc) "\tmovl\t%1,%0\n" 1
stmt: ASGNP(addr,rc) "\tmovl\t%1,%0\n" 1
stmt: ASGNS(addr,rc) "\tmovw\t%1,%0\n" 1
stmt: ASGNB(reg,INDIRB(reg)) "\tmovl\t$%a,%%ecx\n\trep\n\tmovsb\n"
stmt: ARGI(mrca) "\tpushl\t%0\n" 1
stmt: ARGP(mrca) "\tpushl\t%0\n" 1
stmt: ARGB(INDIRB(reg)) "\tsubl\t$%a,%%esp\n\tmovl\t%%esp,%%edi\n\tmovl\t$%a,%%ecx\n\trep\n\tmovsb\n"
memf: INDIRD(addr) "l\t%0"
memf: INDIRF(addr) "s\t%0"
memf: CVFD(INDIRF(addr)) "s\t%0"
freg: memf "\tfld%0\n" 3
stmt: ASGND(addr,freg) "\tfstpl\t%0\n" 7
stmt: ASGNF(addr,freg) "\tfstps\t%0\n" 7
stmt: ASGNF(addr,CVDF(freg)) "\tfstps\t%0\n" 7
stmt: ARGD(freg) "\tsubl\t$8,%%esp\n\tfstpl\t(%%esp)\n"
stmt: ARGF(freg) "\tsubl\t$4,%%esp\n\tfstps\t(%%esp)\n"
freg: NEGD(freg) "\tfchs\n"
freg: NEGF(freg) "\tfchs\n"
flt: memf "%0"
flt: freg "p\t%%st,%%st(1)"
freg: ADDD(freg,flt) "\tfadd%1\n"
freg: ADDF(freg,flt) "\tfadd%1\n"
freg: DIVD(freg,memf) "\tfdiv%1\n"
freg: DIVD(freg,freg) "\tfdivrp\t%%st,%%st(1)\n"
freg: DIVF(freg,memf) "\tfdiv%1\n"
freg: DIVF(freg,freg) "\tfdivrp\t%%st,%%st(1)\n"
freg: MULD(freg,flt) "\tfmul%1\n"
freg: MULF(freg,flt) "\tfmul%1\n"
freg: SUBD(freg,memf) "\tfsub%1\n"
freg: SUBD(freg,freg) "\tfsubrp\t%%st,%%st(1)\n"
freg: SUBF(freg,memf) "\tfsub%1\n"
freg: SUBF(freg,freg) "\tfsubrp\t%%st,%%st(1)\n"
freg: CVFD(freg) "# CVFD\n"
freg: CVDF(freg) "\tsub\t$4,%%esp ; fstps (%%esp) ; flds (%%esp) ; addl $4,%%esp\n" 12
stmt: ASGNI(addr,CVDI(freg)) "\tfistpl\t%0\n" 29
reg: CVDI(freg) "\tsubl\t$4,%%esp\n\tfistpl\t0(%%esp)\n\tpopl\t%c\n" 31
freg: CVID(INDIRI(addr)) "\tfildl\t%0\n" 10
freg: CVID(reg) "\tpushl\t%0\n\tfildl\t(%%esp)\n\taddl\t$4,%%esp\n" 12
addrj: ADDRGP "%a"
addrj: reg "*%0" 2
addrj: mem "*%0" 2
addrjmp: ADDRGP "%a"
addrjmp: reg "*%0" 2
addrjmp: mem "*%0" 2
stmt: LABELV "%a:\n"
stmt: JUMPV(addrjmp) "\tjmp\t%0\n" 3
stmt: EQI(mem,rc) "\tcmpl\t%1,%0\n\tje\t%a\n" 5
stmt: GEI(mem,rc) "\tcmpl\t%1,%0\n\tjge\t%a\n" 5
stmt: GTI(mem,rc) "\tcmpl\t%1,%0\n\tjg\t%a\n" 5
stmt: LEI(mem,rc) "\tcmpl\t%1,%0\n\tjle\t%a\n" 5
stmt: LTI(mem,rc) "\tcmpl\t%1,%0\n\tjl\t%a\n" 5
stmt: NEI(mem,rc) "\tcmpl\t%1,%0\n\tjne\t%a\n" 5
stmt: GEU(mem,rc) "\tcmpl\t%1,%0\n\tjae\t%a\n" 5
stmt: GTU(mem,rc) "\tcmpl\t%1,%0\n\tja \t%a\n" 5
stmt: LEU(mem,rc) "\tcmpl\t%1,%0\n\tjbe\t%a\n" 5
stmt: LTU(mem,rc) "\tcmpl\t%1,%0\n\tjb \t%a\n" 5
stmt: EQI(reg,mrc) "\tcmpl\t%1,%0\n\tje\t%a\n" 4
stmt: GEI(reg,mrc) "\tcmpl\t%1,%0\n\tjge\t%a\n" 4
stmt: GTI(reg,mrc) "\tcmpl\t%1,%0\n\tjg\t%a\n" 4
stmt: LEI(reg,mrc) "\tcmpl\t%1,%0\n\tjle\t%a\n" 4
stmt: LTI(reg,mrc) "\tcmpl\t%1,%0\n\tjl\t%a\n" 4
stmt: NEI(reg,mrc) "\tcmpl\t%1,%0\n\tjne\t%a\n" 4
stmt: GEU(reg,mrc) "\tcmpl\t%1,%0\n\tjae\t%a\n" 4
stmt: GTU(reg,mrc) "\tcmpl\t%1,%0\n\tja \t%a\n" 4
stmt: LEU(reg,mrc) "\tcmpl\t%1,%0\n\tjbe\t%a\n" 4
stmt: LTU(reg,mrc) "\tcmpl\t%1,%0\n\tjb \t%a\n" 4
cmpf: INDIRD(addr) "l\t%0"
cmpf: INDIRF(addr) "s\t%0"
cmpf: CVFD(INDIRF(addr)) "s\t%0"
cmpf: freg "p"
stmt: EQD(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tje\t%a\n"
stmt: GED(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tjbe\t%a\n"
stmt: GTD(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tjb\t%a\n"
stmt: LED(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tjae\t%a\n"
stmt: LTD(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tja\t%a\n"
stmt: NED(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tjne\t%a\n"
stmt: EQF(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tje\t%a\n"
stmt: GEF(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tjbe\t%a\n"
stmt: GTF(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tjb\t%a\n"
stmt: LEF(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tjae\t%a\n"
stmt: LTF(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tja\t%a\n"
stmt: NEF(cmpf,freg) "\tfcomp%0 ; fstsw %%ax ; sahf\n\tjne\t%a\n"
reg: CALLI(addrj) "\tcall\t%0\n\taddl\t$%a,%%esp\n" hasargs(a)
reg: CALLI(addrj) "\tcall\t%0\n" 1
stmt: CALLV(addrj) "\tcall\t%0\n\taddl\t$%a,%%esp\n" hasargs(a)
stmt: CALLV(addrj) "\tcall\t%0\n" 1
freg: CALLF(addrj) "\tcall\t%0\n\taddl\t$%a,%%esp\n" hasargs(a)
freg: CALLF(addrj) "\tcall\t%0\n" 1
stmt: CALLF(addrj) "\tcall\t%0\n\taddl\t$%a,%%esp\n\tfstp\t%%st(0)\n" hasargs(a)
stmt: CALLF(addrj) "\tcall\t%0\n\tfstp\t%%st(0)\n" 1
freg: CALLD(addrj) "\tcall\t%0\n\taddl\t$%a,%%esp\n" hasargs(a)
freg: CALLD(addrj) "\tcall\t%0\n" 1
stmt: CALLD(addrj) "\tcall\t%0\n\taddl\t$%a,%%esp\n\tfstp\t%%st(0)\n" hasargs(a)
stmt: CALLD(addrj) "\tcall\t%0\n\tfstp\t%%st(0)\n" 1
stmt: RETI(reg) "# ret\n"
stmt: RETF(freg) "# retf\n"
stmt: RETD(freg) "# retd\n"
%%
static void
progbeg(argc, argv)
char *argv[];
{
int i;
{
union {
char c;
int i;
} u;
u.i = 0;
u.c = 1;
swap = (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);
rmap[C] = mkwildcard(charreg);
rmap[S] = mkwildcard(shortreg);
rmap[P] = rmap[B] = rmap[U] = rmap[I] = mkwildcard(intreg);
rmap[F] = rmap[D] = 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("\t.text\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 void
segment(n)
{
if (n == cseg)
return;
cseg = n;
if (n == CODE)
print("\t.text\n");
else if (cseg == BSS)
print("\t.bss\n");
else if (cseg == DATA || cseg == LIT)
print("\t.data\n");
}
static void
progend()
{
segment(0);
}
static void target(p) Node p; {
assert(p);
switch (p->op) {
case RSHI: case RSHU: case LSHI: case LSHU:
if (generic(p->kids[1]->op) != CNST
&& !( generic(p->kids[1]->op) == INDIR
&& 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
)) {
rtarget(p, 1, intreg[ECX]);
setreg(p, intreg[EAX]);
}
break;
case MULU:
setreg(p, quo);
rtarget(p, 0, intreg[EAX]);
break;
case DIVI: case DIVU:
setreg(p, quo);
rtarget(p, 0, intreg[EAX]);
rtarget(p, 1, intreg[ECX]);
break;
case MODI: case MODU:
setreg(p, rem);
rtarget(p, 0, intreg[EAX]);
rtarget(p, 1, intreg[ECX]);
break;
case ASGNB:
rtarget(p, 0, intreg[EDI]);
rtarget(p, 1, intreg[ESI]);
break;
case ARGB:
rtarget(p->kids[0], 0, intreg[ESI]);
break;
case CALLI: case CALLV:
setreg(p, intreg[EAX]);
break;
case RETI:
rtarget(p, 0, intreg[EAX]);
break;
}
}
static void clobber(p) Node p; {
static int nstack = 0;
assert(p);
nstack = ckstack(p, nstack);
assert(p->count > 0 || nstack == 0);
switch (p->op) {
case DIVI: case DIVU: case MULU:
spill(1 << EDX, IREG, p);
break;
case MODI: case MODU:
spill(1 << EAX, IREG, p);
break;
case ASGNB: case ARGB:
spill(1<<ECX | 1<<ESI | 1<<EDI, IREG, p);
break;
case EQD: case LED: case GED: case LTD: case GTD: case NED:
case EQF: case LEF: case GEF: case LTF: case GTF: case NEF:
spill(1<<EAX, IREG, p);
break;
case CALLD: case CALLF:
spill(1<<EDX | 1<<EAX, IREG, p);
break;
}
}
#define isfp(p) (optype((p)->op)==F || optype((p)->op)==D)
static int ckstack(p, n) 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(2, "(ckstack(%x)=%d)\n", p, n));
assert(n >= 0);
return n;
}
static int
hasargs(p)
Node p;
{
assert(p);
assert(generic(p->op) == CALL);
assert(p->syms[0]);
if (p->syms[0]->u.c.v.i > 0)
return 0;
return LBURG_MAX;
}
static int
memop(p)
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;
}
static int
sametree(p, q)
Node p, 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
emit0(q)
Node q;
{
#if _EMIT_DEBUG
Node p = q;
for (; p; p = p->x.next) {
if (p->op == LABEL+V) {
assert(p->syms[0]);
print("# %s:\n", p->syms[0]->x.name);
} else {
int i;
print("# node%c%d %s count=%d", p->x.listed ? '\'' : '#', p->x.inst,
opname(p->op), p->count);
for (i = 0; i < NELEMS(p->kids) && p->kids[i]; i++)
print(" #%d", p->kids[i]->x.inst);
for (i = 0; i < NELEMS(p->syms) && p->syms[i]; i++) {
if (p->syms[i]->x.name)
print(" %s", p->syms[i]->x.name);
if (p->syms[i]->name != p->syms[i]->x.name)
print(" (%s)", p->syms[i]->name);
}
print("\n");
}
}
#endif
emit(q);
}
static void
emit2(p)
Node p;
{
#define preg(f) ((f)[getregnum(p->x.kids[0])]->x.name)
switch (p->op) {
case CVCI:
print("\tmovsbl\t%s,%s\n",
preg(charreg),
p->syms[RX]->x.name);
break;
case CVCU:
print("\tmovzbl\t%s,%s\n",
preg(charreg),
p->syms[RX]->x.name);
break;
case CVSI:
print("\tmovswl\t%s,%s\n",
preg(shortreg),
p->syms[RX]->x.name);
break;
case CVSU:
print("\tmovzwl\t%s,%s\n",
preg(shortreg),
p->syms[RX]->x.name);
break;
case CVIC: case CVIS:
case CVUC: case CVUS:
{ char *dst = shortreg[getregnum(p)]->x.name;
char *src = preg(shortreg);
if (dst != src)
print("\tmovl\t%s,%s\n", src, dst);
}
break;
}
}
static void
doarg(p)
Node p;
{
assert(p && p->syms[0]);
mkactual(4, p->syms[0]->u.c.v.i);
}
static void
blkfetch(k, off, reg, tmp)
{
}
static void
blkstore(k, off, reg, tmp)
{
}
static void
blkloop(dreg, doff, sreg, soff, size, tmps)
int tmps[];
{
}
static void
local(p)
Symbol p;
{
if (isfloat(p->type))
p->sclass = AUTO;
if (askregvar(p, rmap[ttob(p->type)]) == 0)
mkauto(p);
}
static void
function(f, caller, callee, n)
Symbol f, callee[], caller[];
int n;
{
int i;
print("\t.type\t%s,@function\n", f->x.name);
print("%s:\n", f->x.name);
print("\tpushl\t%%ebx\n");
print("\tpushl\t%%esi\n");
print("\tpushl\t%%edi\n");
print("\tpushl\t%%ebp\n");
print("\tmovl\t%%esp,%%ebp\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);
offset = roundup(offset, q->type->align);
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("\tsubl\t$%d,%%esp\n", framesize);
emitcode();
print("\tleave\n");
print("\tpopl\t%%edi\n");
print("\tpopl\t%%esi\n");
print("\tpopl\t%%ebx\n");
print("\tret\n");
{ int l = genlabel(1);
print("L%d:\n", l);
print("\t.size\t%s,L%d-%s\n", f->x.name, l, f->x.name);
}
}
static void
defsymbol(p)
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(q, p, n)
Symbol q, p;
int 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 {
q->x.offset = p->x.offset + n;
q->x.name = stringd(q->x.offset);
}
}
static void
defconst(ty, v)
Value v;
{
switch (ty) {
case C:
print("\t.byte\t%d\n", v.uc);
return;
case S:
print("\t.word\t%d\n", v.ss);
return;
case I:
print("\t.long\t%d\n", v.i);
return;
case U:
print("\t.long\t0x%x\n", v.u);
return;
case P:
print("\t.long\t0x%x\n", v.p);
return;
case F:
print("\t.long\t0x%x\n", *(unsigned *) &v.f);
return;
case D:{
unsigned *p = (unsigned *) &v.d;
print("\t.long\t0x%x,0x%x\n", p[swap], p[1 - swap]);
return;
}
}
assert(0);
}
static void
defaddress(p)
Symbol p;
{
print("\t.long\t%s\n", p->x.name);
}
static void
defstring(n, str)
char *str;
{
char *s;
#if 1
for (s = str; s < str + n; s++)
print("\t.byte\t%d\n", *s);
#else
print("\t.ascii\t\"", *s);
for (s = str; s < str + n; s++)
if (*s < 0x20)
print("\\0%o", *s);
else
print("%c", *s);
print("\"\n");
#endif
}
static void
export(p)
Symbol p;
{
print("\t.globl\t%s\n", p->x.name);
}
static void
import(p)
Symbol p;
{
int oldseg = cseg;
if (p->ref > 0) {
segment(0);
print("\t.extern\t%s\n", p->x.name);
segment(oldseg);
}
}
static void global (p)
Symbol p;
{
print("\t.align\t%d\n", p->type->align > 4 ? 4 : p->type->align);
if (!p->generated)
print("\t.type\t%s,@%s\n", p->x.name,
isfunc(p->type) ? "function" : "object");
if (p->u.seg == BSS) {
if (p->sclass == STATIC)
print("\t.lcomm\t%s,%d\n", p->x.name, p->type->size);
else
print("\t.comm\t%s,%d\n", p->x.name, p->type->size);
} else {
if (!p->generated)
print("\t.size\t%s,%d\n", p->x.name, p->type->size);
print("%s:\n", p->x.name);
}
}
static void
space(n)
{
if (cseg != BSS)
print("\t.space\t%d\n", n);
}
#include <stab.h>
static char *currentfile; /* current file name */
static int ntypes;
static void stabblock ARGS((int, int, Symbol*));
static void stabfend ARGS((Symbol, int));
static void stabinit ARGS((char *, int, char *[]));
static void stabline ARGS((Coordinate *));
static void stabsym ARGS((Symbol));
static void stabtype ARGS((Symbol));
static void asgncode ARGS((Type, int));
static void dbxout ARGS((Type));
static int dbxtype ARGS((Type));
static int emittype ARGS((Type, int, int));
/* asgncode - assign type code to ty */
static void asgncode(ty, lev) Type ty; {
if (ty->x.marked || ty->x.typeno)
return;
ty->x.marked = 1;
switch (ty->op) {
case VOLATILE: case CONST: case VOLATILE+CONST:
asgncode(ty->type, lev);
ty->x.typeno = ty->type->x.typeno;
break;
case POINTER: case FUNCTION: case ARRAY:
asgncode(ty->type, lev + 1);
/* fall thru */
case VOID: case CHAR: case SHORT: case INT: case UNSIGNED:
case FLOAT: case DOUBLE:
break;
case STRUCT: case UNION: {
Field p;
for (p = fieldlist(ty); p; p = p->link)
asgncode(p->type, lev + 1);
/* fall thru */
case ENUM:
if (ty->x.typeno == 0)
ty->x.typeno = ++ntypes;
if (lev > 0 && (*ty->u.sym->name < '0' || *ty->u.sym->name > '9'))
dbxout(ty);
break;
}
default:
assert(0);
}
}
/* dbxout - output .stabs entry for type ty */
static void dbxout(ty) Type ty; {
ty = unqual(ty);
if (!ty->x.printed) {
int col = 0;
print(".stabs \""), col += 8;
if (ty->u.sym && !(isfunc(ty) || isarray(ty) || isptr(ty)))
print("%s", ty->u.sym->name), col += strlen(ty->u.sym->name);
print(":%c", isstruct(ty) || isenum(ty) ? 'T' : 't'), col += 2;
emittype(ty, 0, col);
print("\",%d,0,0,0\n", N_LSYM);
}
}
/* dbxtype - emit a stabs entry for type ty, return type code */
static int dbxtype(ty) Type ty; {
asgncode(ty, 0);
dbxout(ty);
return ty->x.typeno;
}
/*
* emittype - emit ty's type number, emitting its definition if necessary.
* Returns the output column number after emission; col is the approximate
* output column before emission and is used to emit continuation lines for long
* struct, union, and enum types. Continuations are not emitted for other types,
* even if the definition is long. lev is the depth of calls to emittype.
*/
static int emittype(ty, lev, col) Type ty; {
int tc = ty->x.typeno;
if (isconst(ty) || isvolatile(ty)) {
col = emittype(ty->type, lev, col);
ty->x.typeno = ty->type->x.typeno;
ty->x.printed = 1;
return col;
}
if (tc == 0) {
ty->x.typeno = tc = ++ntypes;
/* fprint(2,"`%t'=%d\n", ty, tc); */
}
print("%d", tc), col += 3;
if (ty->x.printed)
return col;
ty->x.printed = 1;
switch (ty->op) {
case VOID: /* void is defined as itself */
print("=%d", tc), col += 1+3;
break;
case CHAR: /* unsigned char is a subrange of int */
if (ty == unsignedchar)
print("=r1;0;255;"), col += 10;
else /* following pcc, char is a subrange of itself */
print("=r%d;-128;127;", tc), col += 2+3+10;
break;
case SHORT: /* short is a subrange of int */
if (ty == unsignedshort)
print("=r1;0;65535;"), col += 12;
else /* signed */
print("=r1;-32768;32767;"), col += 17;
break;
case INT: /* int is a subrange of itself */
print("=r1;%d;%d;", INT_MIN, INT_MAX), col += 4+11+1+10+1;
break;
case UNSIGNED: /* unsigned is a subrange of int */
print("=r1;0;-1;"), col += 9;
break;
case FLOAT: case DOUBLE: /* float, double get sizes instead of ranges */
print("=r1;%d;0;", ty->size), col += 4+1+3;
break;
case POINTER:
print("=*"), col += 2;
col = emittype(ty->type, lev + 1, col);
break;
case FUNCTION:
print("=f"), col += 2;
col = emittype(ty->type, lev + 1, col);
break;
case ARRAY: /* array includes subscript as an int range */
if (ty->size && ty->type->size)
print("=ar1;0;%d;", ty->size/ty->type->size - 1), col += 7+3+1;
else
print("=ar1;0;-1;"), col += 10;
col = emittype(ty->type, lev + 1, col);
break;
case STRUCT: case UNION: {
Field p;
if (!ty->u.sym->defined) {
print("=x%c%s:", ty->op == STRUCT ? 's' : 'u', ty->u.sym->name);
col += 2+1+strlen(ty->u.sym->name)+1;
break;
}
if (lev > 0 && (*ty->u.sym->name < '0' || *ty->u.sym->name > '9')) {
ty->x.printed = 0;
break;
}
print("=%c%d", ty->op == STRUCT ? 's' : 'u', ty->size), col += 1+1+3;
for (p = fieldlist(ty); p; p = p->link) {
if (p->name)
print("%s:", p->name), col += strlen(p->name)+1;
else
print(":"), col += 1;
col = emittype(p->type, lev + 1, col);
if (p->lsb)
print(",%d,%d;", 8*p->offset +
(IR->little_endian ? fieldright(p) : fieldleft(p)),
fieldsize(p));
else
print(",%d,%d;", 8*p->offset, 8*p->type->size);
col += 1+3+1+3+1; /* accounts for ,%d,%d; */
if (col >= 80 && p->link) {
print("\\\\\",%d,0,0,0\n.stabs \"", N_LSYM);
col = 8;
}
}
print(";"), col += 1;
break;
}
case ENUM: {
Symbol *p;
if (lev > 0 && (*ty->u.sym->name < '0' || *ty->u.sym->name > '9')) {
ty->x.printed = 0;
break;
}
print("=e"), col += 2;
for (p = ty->u.sym->u.idlist; *p; p++) {
print("%s:%d,", (*p)->name, (*p)->u.value), col += strlen((*p)->name)+3;
if (col >= 80 && p[1]) {
print("\\\\\",%d,0,0,0\n.stabs \"", N_LSYM);
col = 8;
}
}
print(";"), col += 1;
break;
}
default:
assert(0);
}
return col;
}
/* stabblock - output a stab entry for '{' or '}' at level lev */
static void stabblock(brace, lev, p) Symbol *p; {
if (brace == '{')
while (*p)
stabsym(*p++);
print(".stabd 0x%x,0,%d\n", brace == '{' ? N_LBRAC : N_RBRAC, lev);
}
/* stabfend - end of function p */
static void stabfend(p, line) Symbol p; {}
/* stabinit - initialize stab output */
static void stabinit(file, argc, argv) char *file, *argv[]; {
typedef void (*Closure) ARGS((Symbol, void *));
if (file && *file) {
(*IR->segment)(CODE);
print("Ltext:.stabs \"%s\",0x%x,0,0,Ltext\n", file, N_SO);
currentfile = file;
}
dbxtype(inttype);
dbxtype(chartype);
dbxtype(doubletype);
dbxtype(floattype);
dbxtype(longdouble);
dbxtype(longtype);
dbxtype(shorttype);
dbxtype(signedchar);
dbxtype(unsignedchar);
dbxtype(unsignedlong);
dbxtype(unsignedshort);
dbxtype(unsignedtype);
dbxtype(voidtype);
foreach(types, GLOBAL, (Closure)stabtype, NULL);
}
/* stabline - emit stab entry for source coordinate *cp */
static void stabline(cp) Coordinate *cp; {
if (cp->file && cp->file != currentfile) {
int lab = genlabel(1);
print("L%d: .stabs \"%s\",0x%x,0,0,L%d\n", lab,
cp->file, N_SOL, lab);
currentfile = cp->file;
}
print(".stabd 0x%x,0,%d\n", N_SLINE, cp->y);
}
/* stabsym - output a stab entry for symbol p */
static void stabsym(p) Symbol p; {
int code, tc, sz = p->type->size;
if (p->generated || p->computed)
return;
if (isfunc(p->type)) {
print(".stabs \"%s:%c%d\",%d,0,0,%s\n", p->name,
p->sclass == STATIC ? 'f' : 'F', dbxtype(freturn(p->type)),
N_FUN, p->x.name);
return;
}
if (!IR->wants_argb && p->scope == PARAM && p->structarg) {
assert(isptr(p->type) && isstruct(p->type->type));
tc = dbxtype(p->type->type);
sz = p->type->type->size;
} else
tc = dbxtype(p->type);
if (p->sclass == AUTO && p->scope == GLOBAL || p->sclass == EXTERN) {
print(".stabs \"%s:G", p->name);
code = N_GSYM;
} else if (p->sclass == STATIC) {
print(".stabs \"%s:%c%d\",%d,0,0,%s\n", p->name, p->scope == GLOBAL ? 'S' : 'V',
tc, p->u.seg == BSS ? N_LCSYM : N_STSYM, p->x.name);
return;
} else if (p->sclass == REGISTER) {
if (p->scope > PARAM) {
int r = p->x.regnode->number;
if (p->x.regnode->set == FREG)
r += 32; /* floating point */
print(".stabs \"%s:r%d\",%d,0,", p->name, tc, N_RSYM);
print("%d,%d\n", sz, r);
}
return;
} else if (p->scope == PARAM) {
print(".stabs \"%s:p", p->name);
code = N_PSYM;
} else if (p->scope >= LOCAL) {
print(".stabs \"%s:", p->name);
code = N_LSYM;
} else
assert(0);
print("%d\",%d,0,0,%s\n", tc, code,
p->scope >= PARAM && p->sclass != EXTERN ? p->x.name : "0");
}
/* stabtype - output a stab entry for type *p */
static void stabtype(p) Symbol p; {
if (p->type) {
if (p->sclass == 0)
dbxtype(p->type);
else if (p->sclass == TYPEDEF)
print(".stabs \"%s:t%d\",%d,0,0,0\n", p->name, dbxtype(p->type), N_LSYM);
}
}
Interface x86freebsdIR = {
1, 1, 0, /* char */
2, 2, 0, /* short */
4, 4, 0, /* int */
4, 4, 1, /* float */
8, 4, 1, /* double */
4, 4, 0, /* T * */
0, 1, 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 */
address,
blockbeg,
blockend,
defaddress,
defconst,
defstring,
defsymbol,
emit0,
export,
function,
gen,
global,
import,
local,
progbeg,
progend,
segment,
space,
stabblock, 0, 0, stabinit, stabline, stabsym, stabtype,
{1, blkfetch, blkstore, blkloop,
_label,
_rule,
_nts,
_kids,
_opname,
_arity,
_string,
_templates,
_isinstruction,
_ntname,
emit2,
doarg,
target,
clobber,
}
};
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