ref: 479a31ae8f4a361b101aa203aa1c0822137708d7
dir: /sys/src/cmd/kl/span.c/
#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 + 4;
if(p->from.sym != S)
p->from.sym->value = c;
continue;
}
if(p->as != ANOP)
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;
}
}
long
regoff(Adr *a)
{
instoffset = 0;
aclass(a);
return instoffset;
}
int
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_CREG:
return C_CREG;
case D_PREG:
if(a->reg == D_FSR)
return C_FSR;
if(a->reg == D_FPQ)
return C_FQ;
return C_PREG;
case D_OREG:
switch(a->name) {
case D_EXTERN:
case D_STATIC:
if(a->sym == S)
break;
t = a->sym->type;
if(t == 0 || t == SXREF) {
diag("undefined external: %s in %s",
a->sym->name, TNAME);
a->sym->type = SDATA;
}
instoffset = a->sym->value + a->offset - BIG;
if(instoffset >= -BIG && instoffset < BIG) {
if(instoffset & 7)
return C_OSEXT;
return C_ESEXT;
}
if(instoffset & 7)
return C_OLEXT;
return C_ELEXT;
case D_AUTO:
instoffset = autosize + a->offset;
goto dauto;
case D_PARAM:
instoffset = autosize + a->offset + 4L;
dauto:
if(instoffset >= -BIG && instoffset < BIG) {
if(instoffset & 7)
return C_OSAUTO;
return C_ESAUTO;
}
if(instoffset & 7)
return C_OLAUTO;
return C_ELAUTO;
case D_NONE:
instoffset = a->offset;
if(instoffset == 0)
return C_ZOREG;
if(instoffset >= -BIG && instoffset < BIG)
return C_SOREG;
return C_LOREG;
}
return C_GOK;
case D_ASI:
if(a->name == D_NONE)
return C_ASI;
return C_GOK;
case D_CONST:
switch(a->name) {
case D_NONE:
instoffset = a->offset;
consize:
if(instoffset == 0)
return C_ZCON;
if(instoffset >= -0x1000 && instoffset <= 0xfff)
return C_SCON;
if((instoffset & 0x3ff) == 0)
return C_UCON;
return C_LCON;
case D_EXTERN:
case D_STATIC:
s = a->sym;
if(s == S)
break;
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) {
instoffset = s->value + a->offset;
return C_LCON;
}
if(s->type == SCONST) {
instoffset = s->value + a->offset;
goto consize;
}
instoffset = s->value + a->offset - BIG;
if(instoffset >= -BIG && instoffset < BIG && instoffset != 0)
return C_SECON;
instoffset = s->value + a->offset + INITDAT;
/* not sure why this barfs */
return C_LCON;
/*
if(instoffset == 0)
return C_ZCON;
if(instoffset >= -0x1000 && instoffset <= 0xfff)
return C_SCON;
if((instoffset & 0x3ff) == 0)
return C_UCON;
return C_LCON;
*/
case D_AUTO:
instoffset = autosize + a->offset;
if(instoffset >= -BIG && instoffset < BIG)
return C_SACON;
return C_LACON;
case D_PARAM:
instoffset = autosize + a->offset + 4L;
if(instoffset >= -BIG && instoffset < BIG)
return C_SACON;
return C_LACON;
}
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)
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",
p->as, a1, a2, a3);
if(1||!debug['a'])
prasm(p);
if(o == 0)
errorexit();
return o;
}
int
cmp(int a, int b)
{
if(a == b)
return 1;
switch(a) {
case C_LCON:
if(b == C_ZCON || 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)
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_ELEXT:
if(b == C_ESEXT)
return 1;
break;
case C_LEXT:
if(b == C_SEXT ||
b == C_ESEXT || b == C_OSEXT ||
b == C_ELEXT || b == C_OLEXT)
return 1;
break;
case C_SEXT:
if(b == C_ESEXT || b == C_OSEXT)
return 1;
break;
case C_ELAUTO:
if(b == C_ESAUTO)
return 1;
break;
case C_LAUTO:
if(b == C_SAUTO ||
b == C_ESAUTO || b == C_OSAUTO ||
b == C_ELAUTO || b == C_OLAUTO)
return 1;
break;
case C_SAUTO:
if(b == C_ESAUTO || b == C_OSAUTO)
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;
case C_ANY:
return 1;
}
return 0;
}
int
ocmp(const void *a1, const void *a2)
{
Optab *p1, *p2;
int n;
p1 = (Optab*)a1;
p2 = (Optab*)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<C_NCLASS; i++)
for(n=0; n<C_NCLASS; 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 AADD:
oprange[AADDX] = oprange[r];
oprange[ASUB] = oprange[r];
oprange[ASUBX] = oprange[r];
oprange[AMUL] = oprange[r];
oprange[AXOR] = oprange[r];
oprange[AXNOR] = oprange[r];
oprange[AAND] = oprange[r];
oprange[AANDN] = oprange[r];
oprange[AOR] = oprange[r];
oprange[AORN] = oprange[r];
oprange[ASLL] = oprange[r];
oprange[ASRL] = oprange[r];
oprange[ASRA] = oprange[r];
oprange[AADDCC] = oprange[r];
oprange[AADDXCC] = oprange[r];
oprange[ATADDCC] = oprange[r];
oprange[ATADDCCTV] = oprange[r];
oprange[ASUBCC] = oprange[r];
oprange[ASUBXCC] = oprange[r];
oprange[ATSUBCC] = oprange[r];
oprange[ATSUBCCTV] = oprange[r];
oprange[AXORCC] = oprange[r];
oprange[AXNORCC] = oprange[r];
oprange[AANDCC] = oprange[r];
oprange[AANDNCC] = oprange[r];
oprange[AORCC] = oprange[r];
oprange[AORNCC] = oprange[r];
oprange[AMULSCC] = oprange[r];
oprange[ASAVE] = oprange[r];
oprange[ARESTORE] = oprange[r];
break;
case AMOVB:
oprange[AMOVH] = oprange[r];
oprange[AMOVHU] = oprange[r];
oprange[AMOVBU] = oprange[r];
oprange[ASWAP] = oprange[r];
oprange[ATAS] = oprange[r];
break;
case ABA:
oprange[ABN] = oprange[r];
oprange[AFBA] = oprange[r];
oprange[AFBN] = oprange[r];
break;
case ABE:
oprange[ABCC] = oprange[r];
oprange[ABCS] = oprange[r];
oprange[ABGE] = oprange[r];
oprange[ABGU] = oprange[r];
oprange[ABG] = oprange[r];
oprange[ABLEU] = oprange[r];
oprange[ABLE] = oprange[r];
oprange[ABL] = oprange[r];
oprange[ABNEG] = oprange[r];
oprange[ABNE] = oprange[r];
oprange[ABPOS] = oprange[r];
oprange[ABVC] = oprange[r];
oprange[ABVS] = oprange[r];
oprange[AFBE] = oprange[r];
oprange[AFBG] = oprange[r];
oprange[AFBGE] = oprange[r];
oprange[AFBL] = oprange[r];
oprange[AFBLE] = oprange[r];
oprange[AFBLG] = oprange[r];
oprange[AFBNE] = oprange[r];
oprange[AFBO] = oprange[r];
oprange[AFBU] = oprange[r];
oprange[AFBUE] = oprange[r];
oprange[AFBUG] = oprange[r];
oprange[AFBUGE] = oprange[r];
oprange[AFBUL] = oprange[r];
oprange[AFBULE] = oprange[r];
break;
case ATA:
oprange[ATCC] = oprange[r];
oprange[ATCS] = oprange[r];
oprange[ATE] = oprange[r];
oprange[ATGE] = oprange[r];
oprange[ATGU] = oprange[r];
oprange[ATG] = oprange[r];
oprange[ATLEU] = oprange[r];
oprange[ATLE] = oprange[r];
oprange[ATL] = oprange[r];
oprange[ATNEG] = oprange[r];
oprange[ATNE] = oprange[r];
oprange[ATN] = oprange[r];
oprange[ATPOS] = oprange[r];
oprange[ATVC] = oprange[r];
oprange[ATVS] = oprange[r];
break;
case AFADDD:
oprange[AFADDF] = oprange[r];
oprange[AFADDX] = oprange[r];
oprange[AFDIVD] = oprange[r];
oprange[AFDIVF] = oprange[r];
oprange[AFDIVX] = oprange[r];
oprange[AFMULD] = oprange[r];
oprange[AFMULF] = oprange[r];
oprange[AFMULX] = oprange[r];
oprange[AFSUBD] = oprange[r];
oprange[AFSUBF] = oprange[r];
oprange[AFSUBX] = oprange[r];
break;
case AFCMPD:
oprange[AFCMPF] = oprange[r];
oprange[AFCMPX] = oprange[r];
oprange[AFCMPED] = oprange[r];
oprange[AFCMPEF] = oprange[r];
oprange[AFCMPEX] = oprange[r];
break;
case AFABSF:
oprange[AFMOVDF] = oprange[r];
oprange[AFMOVDW] = oprange[r];
oprange[AFMOVFD] = oprange[r];
oprange[AFMOVFW] = oprange[r];
oprange[AFMOVWD] = oprange[r];
oprange[AFMOVWF] = oprange[r];
oprange[AFNEGF] = oprange[r];
oprange[AFSQRTD] = oprange[r];
oprange[AFSQRTF] = oprange[r];
break;
case AFMOVF:
case AFMOVD:
case AMOVW:
case AMOVD:
case AWORD:
case ARETT:
case AJMPL:
case AJMP:
case ACMP:
case ANOP:
case ATEXT:
case ADIV:
case ADIVL:
case AMOD:
case AMODL:
break;
}
}
}