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- #include "l.h"
- void
- span(void)
- {
- Prog *p;
- Sym *setext;
- Optab *o;
- int m;
- long c;
- if(debug['v'])
- Bprint(&bso, "%5.2f span\n", cputime());
- Bflush(&bso);
- c = INITTEXT;
- for(p = firstp; p != P; p = p->link) {
- p->pc = c;
- o = oplook(p);
- m = o->size;
- if(m == 0) {
- if(p->as == ATEXT) {
- curtext = p;
- autosize = p->to.offset + 8;
- if(p->from.sym != S)
- p->from.sym->value = c;
- continue;
- }
- diag("zero-width instruction\n%P", p);
- continue;
- }
- c += m;
- }
- c = rnd(c, 8);
- setext = lookup("etext", 0);
- if(setext != S) {
- setext->value = c;
- textsize = c - INITTEXT;
- }
- if(INITRND)
- INITDAT = rnd(c, INITRND);
- if(debug['v'])
- Bprint(&bso, "tsize = %lux\n", textsize);
- Bflush(&bso);
- }
-
- void
- xdefine(char *p, int t, long v)
- {
- Sym *s;
- s = lookup(p, 0);
- if(s->type == 0 || s->type == SXREF) {
- s->type = t;
- s->value = v;
- }
- }
- vlong /* BUG? */
- regoff(Adr *a)
- {
- offset = 0;
- aclass(a);
- return offset;
- }
- /*
- * note that we can't generate every 32 bit constant with MOVQA+MOVQAH, hence the
- * comparison with 0x7fff8000. offset >= this value gets incorrectly sign extended in
- * the 64 bit register.
- */
- aclass(Adr *a)
- {
- Sym *s;
- int t;
- switch(a->type) {
- case D_NONE:
- return C_NONE;
- case D_REG:
- return C_REG;
- case D_FREG:
- return C_FREG;
- case D_FCREG:
- return C_FCREG;
- case D_PREG:
- return C_PREG;
- case D_PCC:
- return C_PCC;
- case D_OREG:
- switch(a->name) {
- case D_EXTERN:
- case D_STATIC:
- if(a->sym == 0) {
- print("null sym external\n");
- print("%D\n", a);
- return C_GOK;
- }
- t = a->sym->type;
- if(t == 0 || t == SXREF) {
- diag("undefined external: %s in %s",
- a->sym->name, TNAME);
- a->sym->type = SDATA;
- }
- offset = a->sym->value + a->offset - BIG;
- if(offset >= -BIG && offset < BIG)
- return C_SEXT;
- if (offset >= -0x80000000LL && offset < 0x7fff8000LL)
- return C_LEXT;
- badoff:
- diag("offset out of range: 0x%lux", offset);
- return C_GOK;
- case D_AUTO:
- offset = autosize + a->offset;
- if(offset >= -BIG && offset < BIG)
- return C_SAUTO;
- if (offset >= -0x80000000LL && offset < 0x7fff8000LL)
- return C_LAUTO;
- goto badoff;
- case D_PARAM:
- offset = autosize + a->offset + 8L;
- if(offset >= -BIG && offset < BIG)
- return C_SAUTO;
- if (offset >= -0x80000000LL && offset < 0x7fff8000LL)
- return C_LAUTO;
- goto badoff;
- case D_NONE:
- offset = a->offset;
- if(offset == 0)
- return C_ZOREG;
- if(offset >= -BIG && offset < BIG)
- return C_SOREG;
- if (offset >= -0x80000000LL && offset < 0x7fff8000LL)
- return C_LOREG;
- goto badoff;
- }
- return C_GOK;
- case D_CONST:
- switch(a->name) {
- case D_NONE:
- offset = a->offset;
- if(offset > 0) {
- if(offset <= 0xffLL)
- return C_BCON;
- if(offset <= 0x7fffLL)
- return C_SCON;
- if((offset & 0xffffLL) == 0 && offset <= 0x7fff0000LL)
- return C_UCON;
- if (offset < 0x7fff8000LL)
- return C_LCON;
- return C_QCON;
- }
- if(offset == 0)
- return C_ZCON;
- if(offset >= -0x100LL)
- return C_NCON;
- if(offset >= -0x8000LL)
- return C_SCON;
- if((offset & 0xffffLL) == 0 && offset >= -0x80000000LL)
- return C_UCON;
- if (offset >= -0x80000000LL)
- return C_LCON;
- return C_QCON;
- case D_EXTERN:
- case D_STATIC:
- s = a->sym;
- if(s == 0) {
- print("null sym const\n");
- print("%D\n", a);
- return C_GOK;
- }
- t = s->type;
- if(t == 0 || t == SXREF) {
- diag("undefined external: %s in %s",
- s->name, TNAME);
- s->type = SDATA;
- }
- if(s->type == STEXT || s->type == SLEAF) {
- offset = s->value + a->offset;
- return C_LCON;
- }
- offset = s->value + a->offset - BIG;
- if (offset == 0L) {
- offset = s->value + a->offset + INITDAT;
- return C_LCON; /* botch */
- }
- if(offset >= -BIG && offset < BIG && offset != 0L)
- return C_SECON;
- if (offset >= -0x80000000LL && offset < 0x7fff8000L && offset != 0LL /*&& offset >= -INITDAT*/)
- return C_LECON;
- /*offset = s->value + a->offset + INITDAT;*/
- /* if (offset >= -BIG && offset < BIG)
- return C_SCON;
- if (offset >= -0x80000000LL && offset < 0x7fff8000LL)
- return C_LCON; */
- goto badoff;
- /*return C_QCON;*/
- case D_AUTO:
- offset = autosize + a->offset;
- if(offset >= -BIG && offset < BIG)
- return C_SACON;
- if (offset >= -0x80000000LL && offset < 0x7fff8000LL)
- return C_LACON;
- goto badoff;
- case D_PARAM:
- offset = autosize + a->offset + 8L;
- if(offset >= -BIG && offset < BIG)
- return C_SACON;
- if (offset >= -0x80000000LL && offset < 0x7fff8000LL)
- return C_LACON;
- goto badoff;
- }
- return C_GOK;
- case D_BRANCH:
- return C_SBRA;
- }
- return C_GOK;
- }
- Optab*
- oplook(Prog *p)
- {
- int a1, a2, a3, r;
- char *c1, *c3;
- Optab *o, *e;
- a1 = p->optab;
- if(a1)
- return optab+(a1-1);
- a1 = p->from.class;
- if(a1 == 0) {
- a1 = aclass(&p->from) + 1;
- p->from.class = a1;
- }
- a1--;
- a3 = p->to.class;
- if(a3 == 0) {
- a3 = aclass(&p->to) + 1;
- p->to.class = a3;
- }
- a3--;
- a2 = C_NONE;
- if(p->reg != NREG)
- a2 = C_REG;
- r = p->as;
- o = oprange[r].start;
- if(o == 0) {
- a1 = opcross[repop[r]][a1][a2][a3];
- if(a1) {
- p->optab = a1+1;
- return optab+a1;
- }
- o = oprange[r].stop; /* just generate an error */
- }
- e = oprange[r].stop;
- c1 = xcmp[a1];
- c3 = xcmp[a3];
- for(; o<e; o++)
- if(o->a2 == a2)
- if(c1[o->a1])
- if(c3[o->a3]) {
- p->optab = (o-optab)+1;
- return o;
- }
- diag("illegal combination %A %d %d %d (opcross %d)",
- p->as, p->from.class-1, a2, a3, a1);
- if(!debug['a'])
- prasm(p);
- o = optab;
- p->optab = (o-optab)+1;
- return o;
- }
- int
- cmp(int a, int b)
- {
- if(a == b)
- return 1;
- switch(a) {
- case C_QCON:
- if(b == C_ZCON || b == C_BCON || b == C_NCON || b == C_SCON || b == C_UCON || b == C_LCON)
- return 1;
- break;
- case C_LCON:
- if(b == C_ZCON || b == C_BCON || b == C_NCON || b == C_SCON || b == C_UCON)
- return 1;
- break;
- case C_UCON:
- if(b == C_ZCON)
- return 1;
- break;
- case C_SCON:
- if(b == C_ZCON || b == C_BCON || b == C_NCON)
- return 1;
- break;
- case C_BCON:
- if(b == C_ZCON)
- return 1;
- break;
- case C_LACON:
- if(b == C_SACON)
- return 1;
- break;
- case C_LBRA:
- if(b == C_SBRA)
- return 1;
- break;
- case C_LEXT:
- if(b == C_SEXT)
- return 1;
- break;
- case C_LAUTO:
- if(b == C_SAUTO)
- return 1;
- break;
- case C_REG:
- /* if(b == C_ZCON)
- return 1; */
- break;
- case C_LOREG:
- if(b == C_ZOREG || b == C_SOREG)
- return 1;
- break;
- case C_SOREG:
- if(b == C_ZOREG)
- return 1;
- break;
- }
- return 0;
- }
- int
- ocmp(void *a1, void *a2)
- {
- Optab *p1, *p2;
- int n;
- p1 = a1;
- p2 = a2;
- n = p1->as - p2->as;
- if(n)
- return n;
- n = p1->a1 - p2->a1;
- if(n)
- return n;
- n = p1->a2 - p2->a2;
- if(n)
- return n;
- n = p1->a3 - p2->a3;
- if(n)
- return n;
- return 0;
- }
- void
- buildop(void)
- {
- int i, n, r;
- for(i=0; i<32; i++)
- for(n=0; n<32; n++)
- xcmp[i][n] = cmp(n, i);
- for(n=0; optab[n].as != AXXX; n++)
- ;
- qsort(optab, n, sizeof(optab[0]), ocmp);
- for(i=0; i<n; i++) {
- r = optab[i].as;
- oprange[r].start = optab+i;
- while(optab[i].as == r)
- i++;
- oprange[r].stop = optab+i;
- i--;
-
- switch(r)
- {
- default:
- diag("unknown op in build: %A", r);
- errorexit();
- case AADDQ:
- oprange[AS4ADDQ] = oprange[r];
- oprange[AS8ADDQ] = oprange[r];
- oprange[ASUBQ] = oprange[r];
- oprange[AS4SUBQ] = oprange[r];
- oprange[AS8SUBQ] = oprange[r];
- break;
- case AADDL:
- oprange[AADDLV] = oprange[r];
- oprange[AS4ADDL] = oprange[r];
- oprange[AS8ADDL] = oprange[r];
- oprange[AADDQV] = oprange[r];
- oprange[ASUBQV] = oprange[r];
- oprange[ASUBL] = oprange[r];
- oprange[ASUBLV] = oprange[r];
- oprange[AS4SUBL] = oprange[r];
- oprange[AS8SUBL] = oprange[r];
- break;
- case AAND:
- oprange[AANDNOT] = oprange[r];
- oprange[AOR] = oprange[r];
- oprange[AORNOT] = oprange[r];
- oprange[AXOR] = oprange[r];
- oprange[AXORNOT] = oprange[r];
- break;
- case AMULQ:
- oprange[ACMPEQ] = oprange[r];
- oprange[ACMPGT] = oprange[r];
- oprange[ACMPGE] = oprange[r];
- oprange[ACMPUGT] = oprange[r];
- oprange[ACMPUGE] = oprange[r];
- oprange[ACMPBLE] = oprange[r];
- oprange[ACMOVEQ] = oprange[r];
- oprange[ACMOVNE] = oprange[r];
- oprange[ACMOVLT] = oprange[r];
- oprange[ACMOVGE] = oprange[r];
- oprange[ACMOVLE] = oprange[r];
- oprange[ACMOVGT] = oprange[r];
- oprange[ACMOVLBS] = oprange[r];
- oprange[ACMOVLBC] = oprange[r];
- oprange[AMULL] = oprange[r];
- oprange[AMULLV] = oprange[r];
- oprange[AMULQV] = oprange[r];
- oprange[AUMULH] = oprange[r];
- oprange[ASLLQ] = oprange[r];
- oprange[ASRLQ] = oprange[r];
- oprange[ASRAQ] = oprange[r];
- oprange[AEXTBL] = oprange[r];
- oprange[AEXTWL] = oprange[r];
- oprange[AEXTLL] = oprange[r];
- oprange[AEXTQL] = oprange[r];
- oprange[AEXTWH] = oprange[r];
- oprange[AEXTLH] = oprange[r];
- oprange[AEXTQH] = oprange[r];
- oprange[AINSBL] = oprange[r];
- oprange[AINSWL] = oprange[r];
- oprange[AINSLL] = oprange[r];
- oprange[AINSQL] = oprange[r];
- oprange[AINSWH] = oprange[r];
- oprange[AINSLH] = oprange[r];
- oprange[AINSQH] = oprange[r];
- oprange[AMSKBL] = oprange[r];
- oprange[AMSKWL] = oprange[r];
- oprange[AMSKLL] = oprange[r];
- oprange[AMSKQL] = oprange[r];
- oprange[AMSKWH] = oprange[r];
- oprange[AMSKLH] = oprange[r];
- oprange[AMSKQH] = oprange[r];
- oprange[AZAP] = oprange[r];
- oprange[AZAPNOT] = oprange[r];
- break;
- case ABEQ:
- oprange[ABNE] = oprange[r];
- oprange[ABGE] = oprange[r];
- oprange[ABLE] = oprange[r];
- oprange[ABGT] = oprange[r];
- oprange[ABLT] = oprange[r];
- break;
- case AFBEQ:
- oprange[AFBNE] = oprange[r];
- oprange[AFBGE] = oprange[r];
- oprange[AFBLE] = oprange[r];
- oprange[AFBGT] = oprange[r];
- oprange[AFBLT] = oprange[r];
- break;
- case AMOVQ:
- oprange[AMOVL] = oprange[r];
- oprange[AMOVLU] = oprange[r];
- oprange[AMOVQU] = oprange[r];
- oprange[AMOVA] = oprange[r];
- oprange[AMOVAH] = oprange[r];
- oprange[AMOVBU] = oprange[r];
- oprange[AMOVWU] = oprange[r];
- oprange[AMOVB] = oprange[r];
- oprange[AMOVW] = oprange[r];
- break;
- case AMOVT:
- oprange[AMOVS] = oprange[r];
- break;
- case AADDT:
- oprange[AADDS] = oprange[r];
- oprange[ACMPTEQ] = oprange[r];
- oprange[ACMPTGT] = oprange[r];
- oprange[ACMPTGE] = oprange[r];
- oprange[ACMPTUN] = oprange[r];
- oprange[ADIVS] = oprange[r];
- oprange[ADIVT] = oprange[r];
- oprange[AMULS] = oprange[r];
- oprange[AMULT] = oprange[r];
- oprange[ASUBS] = oprange[r];
- oprange[ASUBT] = oprange[r];
- oprange[ACPYS] = oprange[r];
- oprange[ACPYSN] = oprange[r];
- oprange[ACPYSE] = oprange[r];
- oprange[ACVTLQ] = oprange[r];
- oprange[ACVTQL] = oprange[r];
- oprange[AFCMOVEQ] = oprange[r];
- oprange[AFCMOVNE] = oprange[r];
- oprange[AFCMOVLT] = oprange[r];
- oprange[AFCMOVGE] = oprange[r];
- oprange[AFCMOVLE] = oprange[r];
- oprange[AFCMOVGT] = oprange[r];
- break;
- case ACVTTQ:
- oprange[ACVTQT] = oprange[r];
- oprange[ACVTTS] = oprange[r];
- oprange[ACVTQS] = oprange[r];
- break;
- case AJMP:
- case AJSR:
- break;
- case ACALL_PAL:
- break;
- case AMOVQL:
- oprange[AMOVLL] = oprange[r];
- break;
- case AMOVQC:
- oprange[AMOVLC] = oprange[r];
- break;
- case AMOVQP:
- oprange[AMOVLP] = oprange[r];
- break;
- case AREI:
- oprange[AMB] = oprange[r];
- oprange[ATRAPB] = oprange[r];
- break;
- case AFETCH:
- oprange[AFETCHM] = oprange[r];
- break;
- case AWORD:
- case ATEXT:
- break;
- }
- }
- }
- void
- buildrep(int x, int as)
- {
- Opcross *p;
- Optab *e, *s, *o;
- int a1, a2, a3, n;
- if(C_NONE != 0 || C_REG != 1 || C_GOK >= 32 || x >= nelem(opcross)) {
- diag("assumptions fail in buildrep");
- errorexit();
- }
- repop[as] = x;
- p = (opcross + x);
- s = oprange[as].start;
- e = oprange[as].stop;
- for(o=e-1; o>=s; o--) {
- n = o-optab;
- for(a2=0; a2<2; a2++) {
- if(a2) {
- if(o->a2 == C_NONE)
- continue;
- } else
- if(o->a2 != C_NONE)
- continue;
- for(a1=0; a1<32; a1++) {
- if(!xcmp[a1][o->a1])
- continue;
- for(a3=0; a3<32; a3++)
- if(xcmp[a3][o->a3])
- (*p)[a1][a2][a3] = n;
- }
- }
- }
- oprange[as].start = 0;
- }
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