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- #include "gc.h"
- void
- ginit(void)
- {
- Type *t;
- thechar = '7';
- thestring = "alpha";
- exregoffset = REGEXT;
- exfregoffset = FREGEXT;
- listinit();
- nstring = 0;
- mnstring = 0;
- nrathole = 0;
- pc = 0;
- breakpc = -1;
- continpc = -1;
- cases = C;
- firstp = P;
- lastp = P;
- tfield = types[TLONG];
- typeword = typechlvp;
- typecmplx = typesu;
- zprog.link = P;
- zprog.as = AGOK;
- zprog.reg = NREG;
- zprog.from.type = D_NONE;
- zprog.from.name = D_NONE;
- zprog.from.reg = NREG;
- zprog.to = zprog.from;
- regnode.op = OREGISTER;
- regnode.class = CEXREG;
- regnode.reg = REGTMP;
- regnode.complex = 0;
- regnode.addable = 11;
- regnode.type = types[TLONG];
- constnode.op = OCONST;
- constnode.class = CXXX;
- constnode.complex = 0;
- constnode.addable = 20;
- constnode.type = types[TLONG];
- fconstnode.op = OCONST;
- fconstnode.class = CXXX;
- fconstnode.complex = 0;
- fconstnode.addable = 20;
- fconstnode.type = types[TDOUBLE];
- nodsafe = new(ONAME, Z, Z);
- nodsafe->sym = slookup(".safe");
- nodsafe->type = types[TINT];
- nodsafe->etype = types[TINT]->etype;
- nodsafe->class = CAUTO;
- complex(nodsafe);
- t = typ(TARRAY, types[TCHAR]);
- symrathole = slookup(".rathole");
- symrathole->class = CGLOBL;
- symrathole->type = t;
- nodrat = new(ONAME, Z, Z);
- nodrat->sym = symrathole;
- nodrat->type = types[TIND];
- nodrat->etype = TVOID;
- nodrat->class = CGLOBL;
- complex(nodrat);
- nodrat->type = t;
- nodret = new(ONAME, Z, Z);
- nodret->sym = slookup(".ret");
- nodret->type = types[TIND];
- nodret->etype = TIND;
- nodret->class = CPARAM;
- nodret = new(OIND, nodret, Z);
- complex(nodret);
- memset(reg, 0, sizeof(reg));
- reg[REGZERO] = 1;
- }
- void
- gclean(void)
- {
- int i;
- Sym *s;
- for(i=0; i<NREG; i++)
- if(i != REGZERO)
- if(reg[i])
- diag(Z, "reg %d left allocated", i);
- for(i=NREG; i<NREG+NREG; i+=2)
- if(reg[i])
- diag(Z, "freg %d left allocated", i-NREG);
- while(mnstring)
- outstring("", 1L);
- symstring->type->width = nstring;
- symrathole->type->width = nrathole;
- for(i=0; i<NHASH; i++)
- for(s = hash[i]; s != S; s = s->link) {
- if(s->type == T)
- continue;
- if(s->type->width == 0)
- continue;
- if(s->class != CGLOBL && s->class != CSTATIC)
- continue;
- if(s->type == types[TENUM])
- continue;
- gpseudo(AGLOBL, s, nodconst(s->type->width));
- }
- nextpc();
- p->as = AEND;
- outcode();
- }
- void
- nextpc(void)
- {
- p = alloc(sizeof(*p));
- *p = zprog;
- p->lineno = nearln;
- pc++;
- if(firstp == P) {
- firstp = p;
- lastp = p;
- return;
- }
- lastp->link = p;
- lastp = p;
- }
- void
- gargs(Node *n, Node *tn1, Node *tn2)
- {
- long regs;
- Node fnxargs[20], *fnxp;
- regs = cursafe;
- fnxp = fnxargs;
- garg1(n, tn1, tn2, 0, &fnxp); /* compile fns to temps */
- curarg = 0;
- fnxp = fnxargs;
- garg1(n, tn1, tn2, 1, &fnxp); /* compile normal args and temps */
- cursafe = regs;
- }
- void
- garg1(Node *n, Node *tn1, Node *tn2, int f, Node **fnxp)
- {
- Node nod;
- if(n == Z)
- return;
- if(n->op == OLIST) {
- garg1(n->left, tn1, tn2, f, fnxp);
- garg1(n->right, tn1, tn2, f, fnxp);
- return;
- }
- if(f == 0) {
- if(n->complex >= FNX) {
- regsalloc(*fnxp, n);
- nod = znode;
- nod.op = OAS;
- nod.left = *fnxp;
- nod.right = n;
- nod.type = n->type;
- cgen(&nod, Z);
- (*fnxp)++;
- }
- return;
- }
- if(typesu[n->type->etype]) {
- regaalloc(tn2, n);
- if(n->complex >= FNX) {
- sugen(*fnxp, tn2, n->type->width);
- (*fnxp)++;
- } else
- sugen(n, tn2, n->type->width);
- return;
- }
- if(REGARG != NREG && curarg == 0 &&
- (typechlp[n->type->etype] || typev[n->type->etype])) {
- regaalloc1(tn1, n);
- if(n->complex >= FNX) {
- cgen(*fnxp, tn1);
- (*fnxp)++;
- } else
- cgen(n, tn1);
- return;
- }
- if(vconst(n) == 0) {
- regaalloc(tn2, n);
- gopcode(OAS, n, Z, tn2);
- return;
- }
- regalloc(tn1, n, Z);
- if(n->complex >= FNX) {
- cgen(*fnxp, tn1);
- (*fnxp)++;
- } else
- cgen(n, tn1);
- regaalloc(tn2, n);
- gopcode(OAS, tn1, Z, tn2);
- regfree(tn1);
- }
- Node*
- nodconst(long v)
- {
- constnode.vconst = v;
- return &constnode;
- }
- Node*
- nodfconst(double d)
- {
- fconstnode.fconst = d;
- return &fconstnode;
- }
- void
- nodreg(Node *n, Node *nn, int reg)
- {
- *n = regnode;
- n->reg = reg;
- n->type = nn->type;
- n->lineno = nn->lineno;
- }
- void
- regret(Node *n, Node *nn)
- {
- int r;
- r = REGRET;
- if(typefd[nn->type->etype])
- r = FREGRET+NREG;
- nodreg(n, nn, r);
- reg[r]++;
- }
- void
- regalloc(Node *n, Node *tn, Node *o)
- {
- int i, j;
- static int lasti;
- switch(tn->type->etype) {
- case TCHAR:
- case TUCHAR:
- case TSHORT:
- case TUSHORT:
- case TINT:
- case TUINT:
- case TLONG:
- case TULONG:
- case TIND:
- case TVLONG:
- case TUVLONG:
- if(o != Z && o->op == OREGISTER) {
- i = o->reg;
- if(i >= 0 && i < NREG - 1)
- goto out;
- }
- j = lasti + REGRET+1;
- for(i=REGRET+1; i<NREG; i++) {
- if(j >= NREG)
- j = REGRET+1;
- if(reg[j] == 0) {
- i = j;
- goto out;
- }
- j++;
- }
- diag(tn, "out of fixed registers");
- goto err;
- case TFLOAT:
- case TDOUBLE:
- if(o != Z && o->op == OREGISTER) {
- i = o->reg;
- if(i >= NREG && i < NREG+NREG)
- goto out;
- }
- j = NREG + 12 + lasti;
- for(i=NREG; i<NREG+NREG; i++) {
- if(j >= NREG+NREG)
- j = NREG;
- if(reg[j] == 0) {
- i = j;
- goto out;
- }
- j++;
- }
- diag(tn, "out of float registers");
- goto err;
- }
- diag(tn, "unknown type in regalloc: %T", tn->type);
- err:
- i = -1;
- out:
- if(i >= 0)
- reg[i]++;
- lasti++;
- if(lasti >= 5)
- lasti = 0;
- nodreg(n, tn, i);
- }
- void
- regialloc(Node *n, Node *tn, Node *o)
- {
- Node nod;
- nod = *tn;
- nod.type = types[TIND];
- regalloc(n, &nod, o);
- }
- void
- regfree(Node *n)
- {
- int i;
- i = 0;
- if(n->op != OREGISTER && n->op != OINDREG)
- goto err;
- i = n->reg;
- if(i < 0 || i >= sizeof(reg))
- goto err;
- if(reg[i] <= 0)
- goto err;
- reg[i]--;
- return;
- err:
- diag(n, "error in regfree: %d op %O", i, n->op);
- }
- void
- regsalloc(Node *n, Node *nn)
- {
- cursafe = align(cursafe, nn->type, Aaut3);
- maxargsafe = maxround(maxargsafe, cursafe+curarg);
- *n = *nodsafe;
- n->xoffset = -(stkoff + cursafe);
- n->type = nn->type;
- n->etype = nn->type->etype;
- n->lineno = nn->lineno;
- }
- void
- regaalloc1(Node *n, Node *nn)
- {
- nodreg(n, nn, REGARG);
- reg[REGARG]++;
- curarg = align(curarg, nn->type, Aarg1);
- curarg = align(curarg, nn->type, Aarg2);
- maxargsafe = maxround(maxargsafe, cursafe+curarg);
- }
- void
- regaalloc(Node *n, Node *nn)
- {
- curarg = align(curarg, nn->type, Aarg1);
- *n = *nn;
- n->op = OINDREG;
- n->reg = REGSP;
- n->xoffset = curarg + SZ_VLONG;
- n->complex = 0;
- n->addable = 20;
- curarg = align(curarg, nn->type, Aarg2);
- maxargsafe = maxround(maxargsafe, cursafe+curarg);
- }
- void
- regind(Node *n, Node *nn)
- {
- if(n->op != OREGISTER) {
- diag(n, "regind not OREGISTER");
- return;
- }
- n->op = OINDREG;
- n->type = nn->type;
- }
- void
- raddr(Node *n, Prog *p)
- {
- Adr a;
- naddr(n, &a);
- if(a.type == D_CONST && a.offset == 0) {
- a.type = D_REG;
- a.reg = 0;
- }
- if(a.type != D_REG && a.type != D_FREG) {
- if(n)
- diag(n, "bad in raddr: %O", n->op);
- else
- diag(n, "bad in raddr: <null>");
- p->reg = NREG;
- } else
- p->reg = a.reg;
- }
- void
- naddr(Node *n, Adr *a)
- {
- vlong v;
- a->type = D_NONE;
- if(n == Z)
- return;
- switch(n->op) {
- default:
- bad:
- diag(n, "bad in naddr: %O", n->op);
- break;
- case OREGISTER:
- a->type = D_REG;
- a->sym = S;
- a->reg = n->reg;
- if(a->reg >= NREG) {
- a->type = D_FREG;
- a->reg -= NREG;
- }
- break;
- case OIND:
- naddr(n->left, a);
- if(a->type == D_REG) {
- a->type = D_OREG;
- break;
- }
- if(a->type == D_CONST) {
- a->type = D_OREG;
- break;
- }
- goto bad;
- case OINDREG:
- a->type = D_OREG;
- a->sym = S;
- a->offset = n->xoffset;
- a->reg = n->reg;
- break;
- case ONAME:
- a->etype = n->etype;
- a->type = D_OREG;
- a->name = D_STATIC;
- a->sym = n->sym;
- a->offset = n->xoffset;
- if(n->class == CSTATIC)
- break;
- if(n->class == CEXTERN || n->class == CGLOBL) {
- a->name = D_EXTERN;
- break;
- }
- if(n->class == CAUTO) {
- a->name = D_AUTO;
- break;
- }
- if(n->class == CPARAM) {
- a->name = D_PARAM;
- break;
- }
- goto bad;
- case OCONST:
- a->sym = S;
- a->reg = NREG;
- if(typefd[n->type->etype]) {
- a->type = D_FCONST;
- a->dval = n->fconst;
- } else if(typev[n->type->etype]) {
- a->type = D_CONST;
- a->offset = n->vconst;
- } else {
- a->type = D_CONST;
- a->offset = convvtox(n->vconst, TLONG); /* alpha arithmetic */
- }
- break;
- case OADDR:
- naddr(n->left, a);
- if(a->type == D_OREG) {
- a->type = D_CONST;
- break;
- }
- goto bad;
- case OADD:
- if(n->left->op == OCONST) {
- naddr(n->left, a);
- v = a->offset;
- naddr(n->right, a);
- } else {
- naddr(n->right, a);
- v = a->offset;
- naddr(n->left, a);
- }
- a->offset += v;
- break;
- }
- }
- void
- fop(int as, int f1, int f2, Node *t)
- {
- Node nod1, nod2, nod3;
- nodreg(&nod1, t, NREG+f1);
- nodreg(&nod2, t, NREG+f2);
- regalloc(&nod3, t, t);
- gopcode(as, &nod1, &nod2, &nod3);
- gmove(&nod3, t);
- regfree(&nod3);
- }
- void
- gmove(Node *f, Node *t)
- {
- int ft, tt, a;
- Node nod;
- double d;
- ft = f->type->etype;
- tt = t->type->etype;
- if(ft == TDOUBLE && f->op == OCONST) {
- d = f->fconst;
- if(d == 0.0) {
- a = FREGZERO;
- goto ffreg;
- }
- if(d == 0.5) {
- a = FREGHALF;
- goto ffreg;
- }
- if(d == 1.0) {
- a = FREGONE;
- goto ffreg;
- }
- if(d == 2.0) {
- a = FREGTWO;
- goto ffreg;
- }
- if(d == -.5) {
- fop(OSUB, FREGHALF, FREGZERO, t);
- return;
- }
- if(d == -1.0) {
- fop(OSUB, FREGONE, FREGZERO, t);
- return;
- }
- if(d == -2.0) {
- fop(OSUB, FREGTWO, FREGZERO, t);
- return;
- }
- if(d == 1.5) {
- fop(OADD, FREGONE, FREGHALF, t);
- return;
- }
- if(d == 2.5) {
- fop(OADD, FREGTWO, FREGHALF, t);
- return;
- }
- if(d == 3.0) {
- fop(OADD, FREGTWO, FREGONE, t);
- return;
- }
- }
- if(ft == TFLOAT && f->op == OCONST) {
- d = f->fconst;
- if(d == 0) {
- a = FREGZERO;
- ffreg:
- nodreg(&nod, f, NREG+a);
- gmove(&nod, t);
- return;
- }
- }
- /*
- * a load --
- * put it into a register then
- * worry what to do with it.
- */
- if(f->op == ONAME || f->op == OINDREG || f->op == OIND) {
- switch(ft) {
- default:
- a = AMOVL;
- break;
- case TVLONG:
- case TUVLONG:
- /* todo: optimise freg case? */
- a = AMOVQ;
- #ifdef is_this_right
- if(typefd[tt]) {
- /* special case can load mem to Freg */
- regalloc(&nod, t, t);
- gins(AMOVL, f, &nod);
- a = ACVTQT;
- if(tt == TFLOAT)
- a = ACVTQS;
- gins(a, &nod, &nod);
- gmove(&nod, t);
- regfree(&nod);
- return;
- }
- #endif is_this_right
- break;
- case TFLOAT:
- a = AMOVS;
- break;
- case TDOUBLE:
- a = AMOVT;
- break;
- case TCHAR:
- a = AMOVB;
- break;
- case TUCHAR:
- a = AMOVBU;
- break;
- case TSHORT:
- a = AMOVW;
- break;
- case TUSHORT:
- a = AMOVWU;
- break;
- }
- if(typechlp[ft] && typeilp[tt])
- regalloc(&nod, t, t);
- else
- regalloc(&nod, f, t);
- gins(a, f, &nod);
- gmove(&nod, t);
- regfree(&nod);
- return;
- }
- /*
- * a store --
- * put it into a register then
- * store it.
- */
- if(t->op == ONAME || t->op == OINDREG || t->op == OIND) {
- switch(tt) {
- default:
- a = AMOVL;
- break;
- case TUCHAR:
- case TCHAR:
- a = AMOVB;
- break;
- case TUSHORT:
- case TSHORT:
- a = AMOVW;
- break;
- case TFLOAT:
- a = AMOVS;
- break;
- case TDOUBLE:
- a = AMOVT;
- break;
- case TVLONG:
- case TUVLONG:
- a = AMOVQ;
- break;
- }
- if(!typefd[ft] && vconst(f) == 0) {
- gins(a, f, t);
- return;
- }
- if(ft == tt)
- regalloc(&nod, t, f);
- else
- regalloc(&nod, t, Z);
- gmove(f, &nod);
- gins(a, &nod, t);
- regfree(&nod);
- return;
- }
- /*
- * type x type cross table
- */
- a = AGOK;
- switch(ft) {
- case TDOUBLE:
- case TFLOAT:
- switch(tt) {
- case TDOUBLE:
- a = AMOVT;
- break;
- case TFLOAT:
- a = ACVTTS;
- if(ft == TFLOAT)
- a = AMOVT;
- break;
- case TINT:
- case TUINT:
- case TLONG:
- case TULONG:
- case TUVLONG:
- case TVLONG:
- case TIND:
- case TSHORT:
- case TUSHORT:
- case TCHAR:
- case TUCHAR:
- /*warn(Z, "float to fix"); /**/
- regalloc(&nod, f, Z); /* should be type float */
- gins(ACVTTQ, f, &nod);
- gins(AMOVT, &nod, nodrat);
- regfree(&nod);
- gins(AMOVQ, nodrat, t);
- gmove(t, t);
- if(nrathole < SZ_VLONG)
- nrathole = SZ_VLONG;
- return;
- }
- break;
- case TVLONG:
- case TUVLONG:
- switch(tt) {
- case TDOUBLE:
- case TFLOAT:
- goto fxtofl;
- case TINT:
- case TUINT:
- case TLONG:
- case TULONG:
- case TIND:
- case TSHORT:
- case TUSHORT:
- case TCHAR:
- case TUCHAR:
- a = AMOVL;
- break;
- case TVLONG:
- case TUVLONG:
- a = AMOVQ;
- break;
- }
- break;
- case TINT:
- case TUINT:
- case TULONG:
- case TLONG:
- case TIND:
- switch(tt) {
- case TDOUBLE:
- case TFLOAT:
- goto fxtofl;
- case TVLONG:
- case TUVLONG:
- if (ft == TULONG || ft == TUINT) {
- a = AMOVLU;
- break;
- }
- case TINT:
- case TUINT:
- case TLONG:
- case TULONG:
- case TIND:
- case TSHORT:
- case TUSHORT:
- case TCHAR:
- case TUCHAR:
- a = AMOVQ;
- break;
- }
- break;
- case TSHORT:
- switch(tt) {
- case TDOUBLE:
- case TFLOAT:
- goto fxtofl;
- case TINT:
- case TUINT:
- case TULONG:
- case TLONG:
- case TVLONG:
- case TUVLONG:
- case TIND:
- a = AMOVW;
- break;
- case TSHORT:
- case TUSHORT:
- case TCHAR:
- case TUCHAR:
- a = AMOVQ;
- break;
- }
- break;
- case TUSHORT:
- switch(tt) {
- case TDOUBLE:
- case TFLOAT:
- goto fxtofl;
- case TINT:
- case TUINT:
- case TLONG:
- case TULONG:
- case TVLONG:
- case TUVLONG:
- case TIND:
- a = AMOVWU;
- break;
- case TSHORT:
- case TUSHORT:
- case TCHAR:
- case TUCHAR:
- a = AMOVQ;
- break;
- }
- break;
- case TCHAR:
- switch(tt) {
- case TDOUBLE:
- case TFLOAT:
- goto fxtofl;
- case TINT:
- case TUINT:
- case TLONG:
- case TULONG:
- case TVLONG:
- case TUVLONG:
- case TIND:
- case TSHORT:
- case TUSHORT:
- a = AMOVB;
- break;
- case TCHAR:
- case TUCHAR:
- a = AMOVQ;
- break;
- }
- break;
- case TUCHAR:
- switch(tt) {
- case TDOUBLE:
- case TFLOAT:
- fxtofl:
- /*warn(Z, "fix to float"); /**/
- regalloc(&nod, t, Z); /* should be type float */
- gins(AMOVQ, f, nodrat);
- gins(AMOVT, nodrat, &nod);
- a = ACVTQT;
- if(tt == TFLOAT)
- a = ACVTQS;
- gins(a, &nod, t);
- regfree(&nod);
- if(nrathole < SZ_VLONG)
- nrathole = SZ_VLONG;
- return;
- case TINT:
- case TUINT:
- case TLONG:
- case TULONG:
- case TVLONG:
- case TUVLONG:
- case TIND:
- case TSHORT:
- case TUSHORT:
- a = AMOVBU;
- break;
- case TCHAR:
- case TUCHAR:
- a = AMOVQ;
- break;
- }
- break;
- }
- if(a == AMOVQ || a == AMOVS || a == AMOVT)
- if(samaddr(f, t))
- return;
- gins(a, f, t);
- }
- void
- gins(int a, Node *f, Node *t)
- {
- nextpc();
- p->as = a;
- if(f != Z)
- naddr(f, &p->from);
- if(t != Z)
- naddr(t, &p->to);
- if(debug['g'])
- print("%P\n", p);
- }
- void
- gopcode(int o, Node *f1, Node *f2, Node *t)
- {
- int a, et;
- Adr ta;
- Node nod;
- et = TLONG;
- if(f1 != Z && f1->type != T) {
- if(f1->op == OCONST && t != Z && t->type != T)
- et = t->type->etype;
- else
- et = f1->type->etype;
- }
- a = AGOK;
- switch(o) {
- case OAS:
- gmove(f1, t);
- return;
- case OASADD:
- case OADD:
- a = AADDL;
- if(et == TFLOAT)
- a = AADDS;
- else
- if(et == TDOUBLE)
- a = AADDT;
- else
- if(et == TVLONG || et == TUVLONG)
- a = AADDQ;
- break;
- case OASSUB:
- case OSUB:
- a = ASUBL;
- if(et == TFLOAT)
- a = ASUBS;
- else
- if(et == TDOUBLE)
- a = ASUBT;
- else
- if(et == TVLONG || et == TUVLONG)
- a = ASUBQ;
- break;
- case OASOR:
- case OOR:
- a = AOR;
- break;
- case OASAND:
- case OAND:
- a = AAND;
- break;
- case OASXOR:
- case OXOR:
- a = AXOR;
- break;
- case OASLSHR:
- case OLSHR:
- a = ASRLL;
- if(et == TVLONG || et == TUVLONG)
- a = ASRLQ;
- break;
- case OASASHR:
- case OASHR:
- a = ASRAL;
- if(et == TVLONG || et == TUVLONG)
- a = ASRAQ;
- break;
- case OASASHL:
- case OASHL:
- a = ASLLL;
- if(et == TVLONG || et == TUVLONG)
- a = ASLLQ;
- break;
- case OFUNC:
- a = AJSR;
- break;
- case OASLMUL:
- case OLMUL:
- case OASMUL:
- case OMUL:
- a = AMULL;
- if(et == TFLOAT)
- a = AMULS;
- else
- if(et == TDOUBLE)
- a = AMULT;
- else
- if(et == TVLONG || et == TUVLONG)
- a = AMULQ;
- break;
- case OASDIV:
- case ODIV:
- a = ADIVL;
- if(et == TFLOAT)
- a = ADIVS;
- else
- if(et == TDOUBLE)
- a = ADIVT;
- else
- if(et == TVLONG || et == TUVLONG)
- a = ADIVQ;
- break;
- case OASMOD:
- case OMOD:
- a = AMODL;
- if(et == TVLONG || et == TUVLONG)
- a = AMODQ;
- break;
- case OASLMOD:
- case OLMOD:
- a = AMODLU;
- if(et == TVLONG || et == TUVLONG)
- a = AMODQU;
- break;
- case OASLDIV:
- case OLDIV:
- a = ADIVLU;
- if(et == TVLONG || et == TUVLONG)
- a = ADIVQU;
- break;
- case OEQ:
- case ONE:
- a = ACMPEQ;
- if(typefd[et])
- a = ACMPTEQ;
- else if (vconst(t) == 0) {
- a = (o == OEQ) ? ABEQ : ABNE;
- t = Z;
- break;
- }
- goto cmp;
- case OLT:
- case OGE:
- a = ACMPGT;
- if(typefd[et])
- a = ACMPTGT;
- else if (vconst(t) == 0) {
- a = (o == OLT) ? ABLT : ABGE;
- t = Z;
- break;
- }
- goto cmp;
- case OLE:
- case OGT:
- a = ACMPGE;
- if(typefd[et])
- a = ACMPTGE;
- else
- if(vconst(t) == 0) {
- a = (o == OLE)? ABLE: ABGT;
- t = Z;
- break;
- }
- goto cmp;
- case OLO:
- case OHS:
- a = ACMPUGT;
- goto cmp;
- case OLS:
- case OHI:
- a = ACMPUGE;
- goto cmp;
- cmp:
- nextpc();
- p->as = a;
- raddr(f1, p);
- naddr(t, &p->from);
- regalloc(&nod, t, Z);
- naddr(&nod, &p->to);
- if(debug['g'])
- print("%P\n", p);
- if(o == OEQ || o == OLT || o == OLE || o == OLO || o == OLS)
- a = typefd[et]? AFBNE: ABNE;
- else
- a = typefd[et]? AFBEQ: ABEQ;
- nextpc();
- p->as = a;
- naddr(&nod, &p->from);
- regfree(&nod);
- if(debug['g'])
- print("%P\n", p);
- return;
- }
- if(a == AGOK)
- diag(Z, "bad in gopcode %O", o);
- nextpc();
- p->as = a;
- if(f1 != Z)
- naddr(f1, &p->from);
- if(f2 != Z) {
- naddr(f2, &ta);
- p->reg = ta.reg;
- if(ta.type == D_CONST && ta.offset == 0)
- p->reg = REGZERO;
- }
- if(t != Z)
- naddr(t, &p->to);
- if(debug['g'])
- print("%P\n", p);
- }
- samaddr(Node *f, Node *t)
- {
- if(f->op != t->op)
- return 0;
- switch(f->op) {
- case OREGISTER:
- if(f->reg != t->reg)
- break;
- return 1;
- }
- return 0;
- }
- void
- gbranch(int o)
- {
- int a;
- a = AGOK;
- switch(o) {
- case ORETURN:
- a = ARET;
- break;
- case OGOTO:
- a = AJMP;
- break;
- }
- nextpc();
- if(a == AGOK) {
- diag(Z, "bad in gbranch %O", o);
- nextpc();
- }
- p->as = a;
- }
- void
- patch(Prog *op, long pc)
- {
- op->to.offset = pc;
- op->to.type = D_BRANCH;
- }
- void
- gpseudo(int a, Sym *s, Node *n)
- {
- nextpc();
- p->as = a;
- p->from.type = D_OREG;
- p->from.sym = s;
- if(a == ATEXT)
- p->reg = (profileflg ? 0 : NOPROF);
- p->from.name = D_EXTERN;
- if(s->class == CSTATIC)
- p->from.name = D_STATIC;
- naddr(n, &p->to);
- if(a == ADATA || a == AGLOBL)
- pc--;
- }
- int
- sconst(Node *n)
- {
- vlong vv;
- if(n->op == OCONST) {
- if(!typefd[n->type->etype]) {
- vv = n->vconst;
- if(vv >= -32766LL && vv < 32766LL)
- return 1;
- }
- }
- return 0;
- }
- int
- sval(long v)
- {
- if(v >= -32766L && v < 32766L)
- return 1;
- return 0;
- }
- int
- bval(vlong v)
- {
- if(v >= 0LL && v < 256LL)
- return 1;
- return 0;
- }
- int
- bconst(Node *n)
- {
- vlong vv;
- if(n->op == OCONST) {
- if(!typefd[n->type->etype]) {
- vv = n->vconst;
- if(vv >= 0LL && vv < 256LL)
- return 1;
- }
- }
- return 0;
- }
- long
- exreg(Type *t)
- {
- long o;
- if(typechlp[t->etype]) {
- if(exregoffset <= 12)
- return 0;
- o = exregoffset;
- exregoffset--;
- return o;
- }
- if(typefd[t->etype]) {
- if(exfregoffset <= 19)
- return 0;
- o = exfregoffset + NREG;
- exfregoffset--;
- return o;
- }
- return 0;
- }
- schar ewidth[NTYPE] =
- {
- -1, /* [TXXX] */
- SZ_CHAR, /* [TCHAR] */
- SZ_CHAR, /* [TUCHAR] */
- SZ_SHORT, /* [TSHORT] */
- SZ_SHORT, /* [TUSHORT] */
- SZ_INT, /* [TINT] */
- SZ_INT, /* [TUINT] */
- SZ_LONG, /* [TLONG] */
- SZ_LONG, /* [TULONG] */
- SZ_VLONG, /* [TVLONG] */
- SZ_VLONG, /* [TUVLONG] */
- SZ_FLOAT, /* [TFLOAT] */
- SZ_DOUBLE, /* [TDOUBLE] */
- SZ_IND, /* [TIND] */
- 0, /* [TFUNC] */
- -1, /* [TARRAY] */
- 0, /* [TVOID] */
- -1, /* [TSTRUCT] */
- -1, /* [TUNION] */
- SZ_INT, /* [TENUM] */
- };
- long ncast[NTYPE] =
- {
- 0, /* [TXXX] */
- BCHAR|BUCHAR, /* [TCHAR] */
- BCHAR|BUCHAR, /* [TUCHAR] */
- BSHORT|BUSHORT, /* [TSHORT] */
- BSHORT|BUSHORT, /* [TUSHORT] */
- BINT|BUINT|BLONG|BULONG|BIND, /* [TINT] */
- BINT|BUINT|BLONG|BULONG|BIND, /* [TUINT] */
- BINT|BUINT|BLONG|BULONG|BIND, /* [TLONG] */
- BINT|BUINT|BLONG|BULONG|BIND, /* [TULONG] */
- BVLONG|BUVLONG, /* [TVLONG] */
- BVLONG|BUVLONG, /* [TUVLONG] */
- BFLOAT, /* [TFLOAT] */
- BDOUBLE, /* [TDOUBLE] */
- BLONG|BULONG|BIND, /* [TIND] */
- 0, /* [TFUNC] */
- 0, /* [TARRAY] */
- 0, /* [TVOID] */
- BSTRUCT, /* [TSTRUCT] */
- BUNION, /* [TUNION] */
- 0, /* [TENUM] */
- };
|