ref: 52cacba37c6f3a125ef931afa4b9c2cdb7438fef
dir: /sys/src/cmd/vl/asm.c/
#include "l.h"
long OFFSET;
/*
long BADOFFSET = -1;
if(OFFSET <= BADOFFSET && OFFSET+4 > BADOFFSET)\
abort();\
OFFSET += 4;\
if(OFFSET == BADOFFSET)\
abort();\
OFFSET++;\
*/
#define LPUT(l) { \
if (little) { \
LLEPUT(l); \
} else { \
LBEPUT(l); \
} \
}
#define LLEPUT(c)\
{\
cbp[0] = (c);\
cbp[1] = (c)>>8;\
cbp[2] = (c)>>16;\
cbp[3] = (c)>>24;\
cbp += 4;\
cbc -= 4;\
if(cbc <= 0)\
cflush();\
}
#define LBEPUT(c)\
{\
cbp[0] = (c)>>24;\
cbp[1] = (c)>>16;\
cbp[2] = (c)>>8;\
cbp[3] = (c);\
cbp += 4;\
cbc -= 4;\
if(cbc <= 0)\
cflush();\
}
#define HPUT(h) { \
if (little) { \
HLEPUT(h); \
} else { \
HBEPUT(h); \
} \
}
#define HLEPUT(c)\
{\
cbp[0] = (c);\
cbp[1] = (c)>>8;\
cbp += 2;\
cbc -= 2;\
if(cbc <= 0)\
cflush();\
}
#define HBEPUT(c)\
{\
cbp[0] = (c)>>8;\
cbp[1] = (c);\
cbp += 2;\
cbc -= 2;\
if(cbc <= 0)\
cflush();\
}
#define CPUT(c)\
{\
cbp[0] = (c);\
cbp++;\
cbc--;\
if(cbc <= 0)\
cflush();\
}
void
objput(long l) /* emit long in byte order appropriate to object machine */
{
LPUT(l);
}
void
objhput(short s)
{
HPUT(s);
}
void
lput(long l) /* emit long in big-endian byte order */
{
LBEPUT(l);
}
long
entryvalue(void)
{
char *a;
Sym *s;
a = INITENTRY;
if(*a >= '0' && *a <= '9')
return atolwhex(a);
s = lookup(a, 0);
if(s->type == 0)
return INITTEXT;
if(s->type != STEXT && s->type != SLEAF)
diag("entry not text: %s", s->name);
return s->value;
}
void
asmb(void)
{
Prog *p;
long t, etext;
Optab *o;
if(debug['v'])
Bprint(&bso, "%5.2f asm\n", cputime());
Bflush(&bso);
OFFSET = HEADR;
seek(cout, OFFSET, 0);
pc = INITTEXT;
for(p = firstp; p != P; p = p->link) {
if(p->as == ATEXT) {
curtext = p;
autosize = p->to.offset + 4;
}
if(p->pc != pc) {
diag("phase error %lux sb %lux",
p->pc, pc);
if(!debug['a'])
prasm(curp);
pc = p->pc;
}
curp = p;
o = oplook(p); /* could probably avoid this call */
if(asmout(p, o, 0)) {
p = p->link;
pc += 4;
}
pc += o->size;
}
if(debug['a'])
Bprint(&bso, "\n");
Bflush(&bso);
cflush();
etext = INITTEXT + textsize;
for(t = pc; t < etext; t += sizeof(buf)-100) {
if(etext-t > sizeof(buf)-100)
datblk(t, sizeof(buf)-100, 1);
else
datblk(t, etext-t, 1);
}
Bflush(&bso);
cflush();
curtext = P;
switch(HEADTYPE) {
case 0:
case 4:
OFFSET = rnd(HEADR+textsize, 4096);
seek(cout, OFFSET, 0);
break;
case 1:
case 2:
case 3:
case 5:
case 6:
OFFSET = HEADR+textsize;
seek(cout, OFFSET, 0);
break;
}
for(t = 0; t < datsize; t += sizeof(buf)-100) {
if(datsize-t > sizeof(buf)-100)
datblk(t, sizeof(buf)-100, 0);
else
datblk(t, datsize-t, 0);
}
symsize = 0;
lcsize = 0;
if(!debug['s']) {
if(debug['v'])
Bprint(&bso, "%5.2f sym\n", cputime());
Bflush(&bso);
switch(HEADTYPE) {
case 0:
case 4:
OFFSET = rnd(HEADR+textsize, 4096)+datsize;
seek(cout, OFFSET, 0);
break;
case 3:
case 2:
case 1:
case 5:
case 6:
OFFSET = HEADR+textsize+datsize;
seek(cout, OFFSET, 0);
break;
}
if(!debug['s'])
asmsym();
if(debug['v'])
Bprint(&bso, "%5.2f pc\n", cputime());
Bflush(&bso);
if(!debug['s'])
asmlc();
cflush();
}
if(debug['v'])
Bprint(&bso, "%5.2f header\n", cputime());
Bflush(&bso);
OFFSET = 0;
seek(cout, OFFSET, 0);
switch(HEADTYPE) {
case 0:
lput(0x160L<<16); /* magic and sections */
lput(0L); /* time and date */
lput(rnd(HEADR+textsize, 4096)+datsize);
lput(symsize); /* nsyms */
lput((0x38L<<16)|7L); /* size of optional hdr and flags */
lput((0413<<16)|0437L); /* magic and version */
lput(rnd(HEADR+textsize, 4096)); /* sizes */
lput(datsize);
lput(bsssize);
lput(entryvalue()); /* va of entry */
lput(INITTEXT-HEADR); /* va of base of text */
lput(INITDAT); /* va of base of data */
lput(INITDAT+datsize); /* va of base of bss */
lput(~0L); /* gp reg mask */
lput(0L);
lput(0L);
lput(0L);
lput(0L);
lput(~0L); /* gp value ?? */
break;
case 1:
lput(0x160L<<16); /* magic and sections */
lput(0L); /* time and date */
lput(HEADR+textsize+datsize);
lput(symsize); /* nsyms */
lput((0x38L<<16)|7L); /* size of optional hdr and flags */
lput((0407<<16)|0437L); /* magic and version */
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(entryvalue()); /* va of entry */
lput(INITTEXT); /* va of base of text */
lput(INITDAT); /* va of base of data */
lput(INITDAT+datsize); /* va of base of bss */
lput(~0L); /* gp reg mask */
lput(lcsize);
lput(0L);
lput(0L);
lput(0L);
lput(~0L); /* gp value ?? */
lput(0L); /* complete mystery */
break;
case 2:
if (little)
t = 24;
else
t = 16;
lput(((((4*t)+0)*t)+7)); /* magic */
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(symsize); /* nsyms */
lput(entryvalue()); /* va of entry */
lput(0L);
lput(lcsize);
break;
case 3:
lput((0x160L<<16)|3L); /* magic and sections */
lput(time(0)); /* time and date */
lput(HEADR+textsize+datsize);
lput(symsize); /* nsyms */
lput((0x38L<<16)|7L); /* size of optional hdr and flags */
lput((0407<<16)|0437L); /* magic and version */
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(entryvalue()); /* va of entry */
lput(INITTEXT); /* va of base of text */
lput(INITDAT); /* va of base of data */
lput(INITDAT+datsize); /* va of base of bss */
lput(~0L); /* gp reg mask */
lput(lcsize);
lput(0L);
lput(0L);
lput(0L);
lput(~0L); /* gp value ?? */
strnput(".text", 8); /* text segment */
lput(INITTEXT); /* address */
lput(INITTEXT);
lput(textsize);
lput(HEADR);
lput(0L);
lput(HEADR+textsize+datsize+symsize);
lput(lcsize & 0xffff); /* line number size */
lput(0x20L); /* flags */
strnput(".data", 8); /* data segment */
lput(INITDAT); /* address */
lput(INITDAT);
lput(datsize);
lput(HEADR+textsize);
lput(0L);
lput(0L);
lput(0L);
lput(0x40L); /* flags */
strnput(".bss", 8); /* bss segment */
lput(INITDAT+datsize); /* address */
lput(INITDAT+datsize);
lput(bsssize);
lput(0L);
lput(0L);
lput(0L);
lput(0L);
lput(0x80L); /* flags */
break;
case 4:
lput((0x160L<<16)|3L); /* magic and sections */
lput(time(0)); /* time and date */
lput(rnd(HEADR+textsize, 4096)+datsize);
lput(symsize); /* nsyms */
lput((0x38L<<16)|7L); /* size of optional hdr and flags */
lput((0413<<16)|01012L); /* magic and version */
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(entryvalue()); /* va of entry */
lput(INITTEXT); /* va of base of text */
lput(INITDAT); /* va of base of data */
lput(INITDAT+datsize); /* va of base of bss */
lput(~0L); /* gp reg mask */
lput(lcsize);
lput(0L);
lput(0L);
lput(0L);
lput(~0L); /* gp value ?? */
strnput(".text", 8); /* text segment */
lput(INITTEXT); /* address */
lput(INITTEXT);
lput(textsize);
lput(HEADR);
lput(0L);
lput(HEADR+textsize+datsize+symsize);
lput(lcsize & 0xffff); /* line number size */
lput(0x20L); /* flags */
strnput(".data", 8); /* data segment */
lput(INITDAT); /* address */
lput(INITDAT);
lput(datsize);
lput(rnd(HEADR+textsize, 4096)); /* sizes */
lput(0L);
lput(0L);
lput(0L);
lput(0x40L); /* flags */
strnput(".bss", 8); /* bss segment */
lput(INITDAT+datsize); /* address */
lput(INITDAT+datsize);
lput(bsssize);
lput(0L);
lput(0L);
lput(0L);
lput(0L);
lput(0x80L); /* flags */
break;
case 5:
/* first part of ELF is byte-wide parts, thus no byte-order issues */
strnput("\177ELF", 4); /* e_ident */
CPUT(1); /* class = 32 bit */
CPUT(little? 1: 2); /* data: 1 = LSB, 2 = MSB */
CPUT(1); /* version = 1 */
strnput("", 9); /* reserved for expansion */
/* entire remainder of ELF file is in target byte order */
/* file header part of ELF header */
objhput(2); /* type = EXEC */
objhput(8); /* machine = MIPS */
objput(1L); /* version = CURRENT */
objput(entryvalue()); /* entry vaddr */
objput(52L); /* offset to first phdr */
objput(0L); /* offset to first shdr */
objput(0L); /* flags (no MIPS flags defined) */
objhput(52); /* Ehdr size */
objhput(32); /* Phdr size */
objhput(3); /* # of Phdrs */
objhput(0); /* Shdr size */
objhput(0); /* # of Shdrs */
objhput(0); /* Shdr string size */
/* "Program headers" - one per chunk of file to load */
/*
* include ELF headers in text -- 8l doesn't,
* but in theory it aids demand loading.
*/
objput(1L); /* text: type = PT_LOAD */
objput(0L); /* file offset */
objput(INITTEXT-HEADR); /* vaddr */
objput(INITTEXT-HEADR); /* paddr */
objput(HEADR+textsize); /* file size */
objput(HEADR+textsize); /* memory size */
objput(0x05L); /* protections = RX */
objput(0x1000L); /* page-align text off's & vaddrs */
objput(1L); /* data: type = PT_LOAD */
objput(HEADR+textsize); /* file offset */
objput(INITDAT); /* vaddr */
objput(INITDAT); /* paddr */
objput(datsize); /* file size */
objput(datsize+bsssize); /* memory size */
objput(0x06L); /* protections = RW */
if(INITDAT % 4096 == 0 && (HEADR + textsize) % 4096 == 0)
objput(0x1000L); /* page-align data off's & vaddrs */
else
objput(0L); /* do not claim alignment */
objput(0L); /* P9 symbols: type = PT_NULL */
objput(HEADR+textsize+datsize); /* file offset */
objput(0L);
objput(0L);
objput(symsize); /* symbol table size */
objput(lcsize); /* line number size */
objput(0x04L); /* protections = R */
objput(0L); /* do not claim alignment */
break;
case 6:
break;
}
cflush();
}
void
strnput(char *s, int n)
{
for(; *s; s++){
CPUT(*s);
n--;
}
for(; n > 0; n--)
CPUT(0);
}
void
cflush(void)
{
int n;
n = sizeof(buf.cbuf) - cbc;
if(n)
write(cout, buf.cbuf, n);
cbp = buf.cbuf;
cbc = sizeof(buf.cbuf);
}
void
nopstat(char *f, Count *c)
{
if(c->outof)
Bprint(&bso, "%s delay %ld/%ld (%.2f)\n", f,
c->outof - c->count, c->outof,
(double)(c->outof - c->count)/c->outof);
}
void
asmsym(void)
{
Prog *p;
Auto *a;
Sym *s;
int h;
s = lookup("etext", 0);
if(s->type == STEXT)
putsymb(s->name, 'T', s->value, s->version);
for(h=0; h<NHASH; h++)
for(s=hash[h]; s!=S; s=s->link)
switch(s->type) {
case SCONST:
putsymb(s->name, 'D', s->value, s->version);
continue;
case SSTRING:
putsymb(s->name, 'T', s->value, s->version);
continue;
case SDATA:
putsymb(s->name, 'D', s->value+INITDAT, s->version);
continue;
case SBSS:
putsymb(s->name, 'B', s->value+INITDAT, s->version);
continue;
case SFILE:
putsymb(s->name, 'f', s->value, s->version);
continue;
}
for(p=textp; p!=P; p=p->cond) {
s = p->from.sym;
if(s->type != STEXT && s->type != SLEAF)
continue;
/* filenames first */
for(a=p->to.autom; a; a=a->link)
if(a->type == D_FILE)
putsymb(a->asym->name, 'z', a->aoffset, 0);
else
if(a->type == D_FILE1)
putsymb(a->asym->name, 'Z', a->aoffset, 0);
if(s->type == STEXT)
putsymb(s->name, 'T', s->value, s->version);
else
putsymb(s->name, 'L', s->value, s->version);
/* frame, auto and param after */
putsymb(".frame", 'm', p->to.offset+4, 0);
for(a=p->to.autom; a; a=a->link)
if(a->type == D_AUTO)
putsymb(a->asym->name, 'a', -a->aoffset, 0);
else
if(a->type == D_PARAM)
putsymb(a->asym->name, 'p', a->aoffset, 0);
}
if(debug['v'] || debug['n'])
Bprint(&bso, "symsize = %lud\n", symsize);
Bflush(&bso);
}
void
putsymb(char *s, int t, long v, int ver)
{
int i, f;
if(t == 'f')
s++;
LBEPUT(v);
if(ver)
t += 'a' - 'A';
CPUT(t+0x80); /* 0x80 is variable length */
if(t == 'Z' || t == 'z') {
CPUT(s[0]);
for(i=1; s[i] != 0 || s[i+1] != 0; i += 2) {
CPUT(s[i]);
CPUT(s[i+1]);
}
CPUT(0);
CPUT(0);
i++;
}
else {
for(i=0; s[i]; i++)
CPUT(s[i]);
CPUT(0);
}
symsize += 4 + 1 + i + 1;
if(debug['n']) {
if(t == 'z' || t == 'Z') {
Bprint(&bso, "%c %.8lux ", t, v);
for(i=1; s[i] != 0 || s[i+1] != 0; i+=2) {
f = ((s[i]&0xff) << 8) | (s[i+1]&0xff);
Bprint(&bso, "/%x", f);
}
Bprint(&bso, "\n");
return;
}
if(ver)
Bprint(&bso, "%c %.8lux %s<%d>\n", t, v, s, ver);
else
Bprint(&bso, "%c %.8lux %s\n", t, v, s);
}
}
#define MINLC 4
void
asmlc(void)
{
long oldpc, oldlc;
Prog *p;
long v, s;
oldpc = INITTEXT;
oldlc = 0;
for(p = firstp; p != P; p = p->link) {
if(p->line == oldlc || p->as == ATEXT || p->as == ANOP) {
if(p->as == ATEXT)
curtext = p;
if(debug['L'])
Bprint(&bso, "%6lux %P\n",
p->pc, p);
continue;
}
if(debug['L'])
Bprint(&bso, "\t\t%6ld", lcsize);
v = (p->pc - oldpc) / MINLC;
while(v) {
s = 127;
if(v < 127)
s = v;
CPUT(s+128); /* 129-255 +pc */
if(debug['L'])
Bprint(&bso, " pc+%ld*%d(%ld)", s, MINLC, s+128);
v -= s;
lcsize++;
}
s = p->line - oldlc;
oldlc = p->line;
oldpc = p->pc + MINLC;
if(s > 64 || s < -64) {
CPUT(0); /* 0 vv +lc */
CPUT(s>>24);
CPUT(s>>16);
CPUT(s>>8);
CPUT(s);
if(debug['L']) {
if(s > 0)
Bprint(&bso, " lc+%ld(%d,%ld)\n",
s, 0, s);
else
Bprint(&bso, " lc%ld(%d,%ld)\n",
s, 0, s);
Bprint(&bso, "%6lux %P\n",
p->pc, p);
}
lcsize += 5;
continue;
}
if(s > 0) {
CPUT(0+s); /* 1-64 +lc */
if(debug['L']) {
Bprint(&bso, " lc+%ld(%ld)\n", s, 0+s);
Bprint(&bso, "%6lux %P\n",
p->pc, p);
}
} else {
CPUT(64-s); /* 65-128 -lc */
if(debug['L']) {
Bprint(&bso, " lc%ld(%ld)\n", s, 64-s);
Bprint(&bso, "%6lux %P\n",
p->pc, p);
}
}
lcsize++;
}
while(lcsize & 1) {
s = 129;
CPUT(s);
lcsize++;
}
if(debug['v'] || debug['L'])
Bprint(&bso, "lcsize = %ld\n", lcsize);
Bflush(&bso);
}
void
datblk(long s, long n, int str)
{
Prog *p;
char *cast;
long l, fl, j, d;
int i, c;
memset(buf.dbuf, 0, n+100);
for(p = datap; p != P; p = p->link) {
curp = p;
if(str != (p->from.sym->type == SSTRING))
continue;
l = p->from.sym->value + p->from.offset - s;
c = p->reg;
i = 0;
if(l < 0) {
if(l+c <= 0)
continue;
while(l < 0) {
l++;
i++;
}
}
if(l >= n)
continue;
if(p->as != AINIT && p->as != ADYNT) {
for(j=l+(c-i)-1; j>=l; j--)
if(buf.dbuf[j]) {
print("%P\n", p);
diag("multiple initialization");
break;
}
}
switch(p->to.type) {
default:
diag("unknown mode in initialization\n%P", p);
break;
case D_FCONST:
switch(c) {
default:
case 4:
fl = ieeedtof(p->to.ieee);
cast = (char*)&fl;
for(; i<c; i++) {
buf.dbuf[l] = cast[fnuxi8[i+4]];
l++;
}
break;
case 8:
cast = (char*)p->to.ieee;
for(; i<c; i++) {
buf.dbuf[l] = cast[fnuxi8[i]];
l++;
}
break;
}
break;
case D_SCONST:
for(; i<c; i++) {
buf.dbuf[l] = p->to.sval[i];
l++;
}
break;
case D_CONST:
d = p->to.offset;
if(p->to.sym) {
switch(p->to.sym->type) {
case STEXT:
case SLEAF:
case SSTRING:
d += p->to.sym->value;
break;
case SDATA:
case SBSS:
d += p->to.sym->value + INITDAT;
break;
}
}
cast = (char*)&d;
switch(c) {
default:
diag("bad nuxi %d %d\n%P", c, i, curp);
break;
case 1:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi1[i]];
l++;
}
break;
case 2:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi2[i]];
l++;
}
break;
case 4:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi4[i]];
l++;
}
break;
}
break;
}
}
write(cout, buf.dbuf, n);
}
#define OP_RRR(op,r1,r2,r3)\
(op|(((r1)&31L)<<16)|(((r2)&31L)<<21)|(((r3)&31L)<<11))
#define OP_IRR(op,i,r2,r3)\
(op|((i)&0xffffL)|(((r2)&31L)<<21)|(((r3)&31L)<<16))
#define OP_SRR(op,s,r2,r3)\
(op|(((s)&31L)<<6)|(((r2)&31L)<<16)|(((r3)&31L)<<11))
#define OP_FRRR(op,r1,r2,r3)\
(op|(((r1)&31L)<<16)|(((r2)&31L)<<11)|(((r3)&31L)<<6))
#define OP_JMP(op,i)\
((op)|((i)&0x3ffffffL))
#define OP(x,y)\
(((x)<<3)|((y)<<0))
#define SP(x,y)\
(((x)<<29)|((y)<<26))
#define BCOND(x,y)\
(((x)<<19)|((y)<<16))
#define MMU(x,y)\
(SP(2,0)|(16<<21)|((x)<<3)|((y)<<0))
#define FPF(x,y)\
(SP(2,1)|(16<<21)|((x)<<3)|((y)<<0))
#define FPD(x,y)\
(SP(2,1)|(17<<21)|((x)<<3)|((y)<<0))
#define FPW(x,y)\
(SP(2,1)|(20<<21)|((x)<<3)|((y)<<0))
int vshift(int);
int
asmout(Prog *p, Optab *o, int aflag)
{
long o1, o2, o3, o4, o5, o6, o7, v;
Prog *ct;
int r, a;
o1 = 0;
o2 = 0;
o3 = 0;
o4 = 0;
o5 = 0;
o6 = 0;
o7 = 0;
switch(o->type) {
default:
diag("unknown type %d", o->type);
if(!debug['a'])
prasm(p);
break;
case 0: /* pseudo ops */
if(aflag) {
if(p->link) {
if(p->as == ATEXT) {
ct = curtext;
o2 = autosize;
curtext = p;
autosize = p->to.offset + 4;
o1 = asmout(p->link, oplook(p->link), aflag);
curtext = ct;
autosize = o2;
} else
o1 = asmout(p->link, oplook(p->link), aflag);
}
return o1;
}
break;
case 1: /* mov[v] r1,r2 ==> OR r1,r0,r2 */
o1 = OP_RRR(oprrr(AOR), p->from.reg, REGZERO, p->to.reg);
break;
case 2: /* add/sub r1,[r2],r3 */
r = p->reg;
if(r == NREG)
r = p->to.reg;
o1 = OP_RRR(oprrr(p->as), p->from.reg, r, p->to.reg);
break;
case 3: /* mov $soreg, r ==> or/add $i,o,r */
v = regoff(&p->from);
r = p->from.reg;
if(r == NREG)
r = o->param;
a = AADDU;
if(o->a1 == C_ANDCON)
a = AOR;
o1 = OP_IRR(opirr(a), v, r, p->to.reg);
break;
case 4: /* add $scon,[r1],r2 */
v = regoff(&p->from);
r = p->reg;
if(r == NREG)
r = p->to.reg;
o1 = OP_IRR(opirr(p->as), v, r, p->to.reg);
break;
case 5: /* syscall */
if(aflag)
return 0;
o1 = oprrr(p->as);
break;
case 6: /* beq r1,[r2],sbra */
if(aflag)
return 0;
if(p->cond == P)
v = -4 >> 2;
else
v = (p->cond->pc - pc-4) >> 2;
if(((v << 16) >> 16) != v)
diag("short branch too far: %ld\n%P", v, p);
o1 = OP_IRR(opirr(p->as), v, p->from.reg, p->reg);
break;
case 7: /* mov r, soreg ==> sw o(r) */
r = p->to.reg;
if(r == NREG)
r = o->param;
v = regoff(&p->to);
o1 = OP_IRR(opirr(p->as), v, r, p->from.reg);
break;
case 8: /* mov soreg, r ==> lw o(r) */
r = p->from.reg;
if(r == NREG)
r = o->param;
v = regoff(&p->from);
o1 = OP_IRR(opirr(p->as+ALAST), v, r, p->to.reg);
break;
case 9: /* asl r1,[r2],r3 */
r = p->reg;
if(r == NREG)
r = p->to.reg;
o1 = OP_RRR(oprrr(p->as), r, p->from.reg, p->to.reg);
break;
case 10: /* add $con,[r1],r2 ==> mov $con,t; add t,[r1],r2 */
v = regoff(&p->from);
r = AOR;
if(v < 0)
r = AADDU;
o1 = OP_IRR(opirr(r), v, 0, REGTMP);
r = p->reg;
if(r == NREG)
r = p->to.reg;
o2 = OP_RRR(oprrr(p->as), REGTMP, r, p->to.reg);
break;
case 11: /* jmp lbra */
if(aflag)
return 0;
if(p->cond == P)
v = p->pc >> 2;
else
v = p->cond->pc >> 2;
o1 = OP_JMP(opirr(p->as), v);
if(!debug['Y'] && p->link && p->cond && isnop(p->link)) {
nop.branch.count--;
nop.branch.outof--;
nop.jump.outof++;
o2 = asmout(p->cond, oplook(p->cond), 1);
if(o2) {
o1 += 1;
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n",
p->pc, o1, o2, p);
LPUT(o1);
LPUT(o2);
return 1;
}
}
break;
case 12: /* movbs r,r */
v = 16;
if(p->as == AMOVB)
v = 24;
o1 = OP_SRR(opirr(ASLL), v, p->from.reg, p->to.reg);
o2 = OP_SRR(opirr(ASRA), v, p->to.reg, p->to.reg);
break;
case 13: /* movbu r,r */
if(p->as == AMOVBU)
o1 = OP_IRR(opirr(AAND), 0xffL, p->from.reg, p->to.reg);
else
o1 = OP_IRR(opirr(AAND), 0xffffL, p->from.reg, p->to.reg);
break;
case 16: /* sll $c,[r1],r2 */
v = regoff(&p->from);
r = p->reg;
if(r == NREG)
r = p->to.reg;
/* OP_SRR will use only the low 5 bits of the shift value */
if(v >= 32 && vshift(p->as))
o1 = OP_SRR(opirr(p->as+ALAST), v-32, r, p->to.reg);
else
o1 = OP_SRR(opirr(p->as), v, r, p->to.reg);
break;
case 18: /* jmp [r1],0(r2) */
if(aflag)
return 0;
r = p->reg;
if(r == NREG)
r = o->param;
o1 = OP_RRR(oprrr(p->as), 0, p->to.reg, r);
break;
case 19: /* mov $lcon,r ==> lu+or */
v = regoff(&p->from);
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, p->to.reg);
o2 = OP_IRR(opirr(AOR), v, p->to.reg, p->to.reg);
break;
case 20: /* mov lohi,r */
r = OP(2,0); /* mfhi */
if(p->from.type == D_LO)
r = OP(2,2); /* mflo */
o1 = OP_RRR(r, REGZERO, REGZERO, p->to.reg);
break;
case 21: /* mov r,lohi */
r = OP(2,1); /* mthi */
if(p->to.type == D_LO)
r = OP(2,3); /* mtlo */
o1 = OP_RRR(r, REGZERO, p->from.reg, REGZERO);
break;
case 22: /* mul r1,r2 */
o1 = OP_RRR(oprrr(p->as), p->from.reg, p->reg, REGZERO);
break;
case 23: /* add $lcon,r1,r2 ==> lu+or+add */
v = regoff(&p->from);
if(p->to.reg == REGTMP || p->reg == REGTMP)
diag("cant synthesize large constant\n%P", p);
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
r = p->reg;
if(r == NREG)
r = p->to.reg;
o3 = OP_RRR(oprrr(p->as), REGTMP, r, p->to.reg);
break;
case 24: /* mov $ucon,,r ==> lu r */
v = regoff(&p->from);
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, p->to.reg);
break;
case 25: /* add/and $ucon,[r1],r2 ==> lu $con,t; add t,[r1],r2 */
v = regoff(&p->from);
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
r = p->reg;
if(r == NREG)
r = p->to.reg;
o2 = OP_RRR(oprrr(p->as), REGTMP, r, p->to.reg);
break;
case 26: /* mov $lsext/auto/oreg,,r2 ==> lu+or+add */
v = regoff(&p->from);
if(p->to.reg == REGTMP)
diag("cant synthesize large constant\n%P", p);
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
r = p->from.reg;
if(r == NREG)
r = o->param;
o3 = OP_RRR(oprrr(AADDU), REGTMP, r, p->to.reg);
break;
case 27: /* mov [sl]ext/auto/oreg,fr ==> lwc1 o(r) */
r = p->from.reg;
if(r == NREG)
r = o->param;
v = regoff(&p->from);
switch(o->size) {
case 20:
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
o4 = OP_IRR(opirr(AMOVF+ALAST), 0, REGTMP, p->to.reg+1);
o5 = OP_IRR(opirr(AMOVF+ALAST), 4, REGTMP, p->to.reg);
break;
case 16:
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
o4 = OP_IRR(opirr(AMOVF+ALAST), 0, REGTMP, p->to.reg);
break;
case 8:
o1 = OP_IRR(opirr(AMOVF+ALAST), v, r, p->to.reg+1);
o2 = OP_IRR(opirr(AMOVF+ALAST), v+4, r, p->to.reg);
break;
case 4:
o1 = OP_IRR(opirr(AMOVF+ALAST), v, r, p->to.reg);
break;
}
break;
case 28: /* mov fr,[sl]ext/auto/oreg ==> swc1 o(r) */
r = p->to.reg;
if(r == NREG)
r = o->param;
v = regoff(&p->to);
switch(o->size) {
case 20:
if(r == REGTMP)
diag("cant synthesize large constant\n%P", p);
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
o4 = OP_IRR(opirr(AMOVF), 0, REGTMP, p->from.reg+1);
o5 = OP_IRR(opirr(AMOVF), 4, REGTMP, p->from.reg);
break;
case 16:
if(r == REGTMP)
diag("cant synthesize large constant\n%P", p);
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
o4 = OP_IRR(opirr(AMOVF), 0, REGTMP, p->from.reg);
break;
case 8:
o1 = OP_IRR(opirr(AMOVF), v, r, p->from.reg+1);
o2 = OP_IRR(opirr(AMOVF), v+4, r, p->from.reg);
break;
case 4:
o1 = OP_IRR(opirr(AMOVF), v, r, p->from.reg);
break;
}
break;
case 30: /* movw r,fr */
r = SP(2,1)|(4<<21); /* mtc1 */
o1 = OP_RRR(r, p->from.reg, 0, p->to.reg);
break;
case 31: /* movw fr,r */
r = SP(2,1)|(0<<21); /* mfc1 */
o1 = OP_RRR(r, p->to.reg, 0, p->from.reg);
break;
case 32: /* fadd fr1,[fr2],fr3 */
r = p->reg;
if(r == NREG)
o1 = OP_FRRR(oprrr(p->as), p->from.reg, p->to.reg, p->to.reg);
else
o1 = OP_FRRR(oprrr(p->as), p->from.reg, r, p->to.reg);
break;
case 33: /* fabs fr1,fr3 */
o1 = OP_FRRR(oprrr(p->as), 0, p->from.reg, p->to.reg);
break;
case 34: /* mov $con,fr ==> or/add $i,r,r2 */
v = regoff(&p->from);
r = AADDU;
if(o->a1 == C_ANDCON)
r = AOR;
o1 = OP_IRR(opirr(r), v, 0, REGTMP);
o2 = OP_RRR(SP(2,1)|(4<<21), REGTMP, 0, p->to.reg); /* mtc1 */
break;
case 35: /* mov r,lext/luto/oreg ==> sw o(r) */
/*
* the lowbits of the constant cannot
* be moved into the offset of the load
* because the mips 4000 in 64-bit mode
* does a 64-bit add and it will screw up.
*/
v = regoff(&p->to);
r = p->to.reg;
if(r == NREG)
r = o->param;
if(r == REGTMP)
diag("cant synthesize large constant\n%P", p);
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
o4 = OP_IRR(opirr(p->as), 0, REGTMP, p->from.reg);
break;
case 36: /* mov lext/lauto/lreg,r ==> lw o(r30) */
v = regoff(&p->from);
r = p->from.reg;
if(r == NREG)
r = o->param;
if(r == REGTMP)
diag("cant synthesize large constant\n%P", p);
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
o4 = OP_IRR(opirr(p->as+ALAST), 0, REGTMP, p->to.reg);
break;
case 37: /* movw r,mr */
r = SP(2,0)|(4<<21); /* mtc0 */
if(p->as == AMOVV)
r = SP(2,0)|(5<<21); /* dmtc0 */
o1 = OP_RRR(r, p->from.reg, 0, p->to.reg);
break;
case 38: /* movw mr,r */
r = SP(2,0)|(0<<21); /* mfc0 */
if(p->as == AMOVV)
r = SP(2,0)|(1<<21); /* dmfc0 */
o1 = OP_RRR(r, p->to.reg, 0, p->from.reg);
break;
case 39: /* rfe ==> jmp+rfe */
if(aflag)
return 0;
o1 = OP_RRR(oprrr(AJMP), 0, p->to.reg, REGZERO);
o2 = oprrr(p->as);
break;
case 40: /* word */
if(aflag)
return 0;
o1 = regoff(&p->to);
break;
case 41: /* movw r,fcr */
o1 = OP_RRR(SP(2,1)|(2<<21), REGZERO, 0, p->to.reg); /* mfcc1 */
o2 = OP_RRR(SP(2,1)|(6<<21), p->from.reg, 0, p->to.reg);/* mtcc1 */
break;
case 42: /* movw fcr,r */
o1 = OP_RRR(SP(2,1)|(2<<21), p->to.reg, 0, p->from.reg);/* mfcc1 */
break;
case 45: /* case r */
if(p->link == P)
v = p->pc+28;
else
v = p->link->pc;
if(v & (1<<15))
o1 = OP_IRR(opirr(ALAST), (v>>16)+1, REGZERO, REGTMP);
else
o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
o2 = OP_SRR(opirr(ASLL), 2, p->from.reg, p->from.reg);
o3 = OP_RRR(oprrr(AADD), p->from.reg, REGTMP, REGTMP);
o4 = OP_IRR(opirr(AMOVW+ALAST), v, REGTMP, REGTMP);
o5 = OP_RRR(oprrr(ANOR), REGZERO, REGZERO, REGZERO);
o6 = OP_RRR(oprrr(AJMP), 0, REGTMP, REGZERO);
o7 = OP_RRR(oprrr(ANOR), REGZERO, REGZERO, REGZERO);
break;
case 46: /* bcase $con,lbra */
if(p->cond == P)
v = p->pc;
else
v = p->cond->pc;
o1 = v;
break;
}
if(aflag)
return o1;
v = p->pc;
switch(o->size) {
default:
if(debug['a'])
Bprint(&bso, " %.8lux:\t\t%P\n", v, p);
break;
case 4:
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux\t%P\n", v, o1, p);
LPUT(o1);
break;
case 8:
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n", v, o1, o2, p);
LPUT(o1);
LPUT(o2);
break;
case 12:
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux%P\n", v, o1, o2, o3, p);
LPUT(o1);
LPUT(o2);
LPUT(o3);
break;
case 16:
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux%P\n",
v, o1, o2, o3, o4, p);
LPUT(o1);
LPUT(o2);
LPUT(o3);
LPUT(o4);
break;
case 20:
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux%P\n",
v, o1, o2, o3, o4, o5, p);
LPUT(o1);
LPUT(o2);
LPUT(o3);
LPUT(o4);
LPUT(o5);
break;
case 28:
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux%P\n",
v, o1, o2, o3, o4, o5, o6, o7, p);
LPUT(o1);
LPUT(o2);
LPUT(o3);
LPUT(o4);
LPUT(o5);
LPUT(o6);
LPUT(o7);
break;
}
return 0;
}
int
isnop(Prog *p)
{
if(p->as != ANOR)
return 0;
if(p->reg != REGZERO && p->reg != NREG)
return 0;
if(p->from.type != D_REG || p->from.reg != REGZERO)
return 0;
if(p->to.type != D_REG || p->to.reg != REGZERO)
return 0;
return 1;
}
long
oprrr(int a)
{
switch(a) {
case AADD: return OP(4,0);
case AADDU: return OP(4,1);
case ASGT: return OP(5,2);
case ASGTU: return OP(5,3);
case AAND: return OP(4,4);
case AOR: return OP(4,5);
case AXOR: return OP(4,6);
case ASUB: return OP(4,2);
case ASUBU: return OP(4,3);
case ANOR: return OP(4,7);
case ASLL: return OP(0,4);
case ASRL: return OP(0,6);
case ASRA: return OP(0,7);
case AREM:
case ADIV: return OP(3,2);
case AREMU:
case ADIVU: return OP(3,3);
case AMUL: return OP(3,0);
case AMULU: return OP(3,1);
case AJMP: return OP(1,0);
case AJAL: return OP(1,1);
case ABREAK: return OP(1,5);
case ASYSCALL: return OP(1,4);
case ATLBP: return MMU(1,0);
case ATLBR: return MMU(0,1);
case ATLBWI: return MMU(0,2);
case ATLBWR: return MMU(0,6);
case ARFE: return MMU(2,0);
case ADIVF: return FPF(0,3);
case ADIVD: return FPD(0,3);
case AMULF: return FPF(0,2);
case AMULD: return FPD(0,2);
case ASUBF: return FPF(0,1);
case ASUBD: return FPD(0,1);
case AADDF: return FPF(0,0);
case AADDD: return FPD(0,0);
case AMOVFW: return FPF(4,4);
case AMOVDW: return FPD(4,4);
case AMOVWF: return FPW(4,0);
case AMOVDF: return FPD(4,0);
case AMOVWD: return FPW(4,1);
case AMOVFD: return FPF(4,1);
case AABSF: return FPF(0,5);
case AABSD: return FPD(0,5);
case AMOVF: return FPF(0,6);
case AMOVD: return FPD(0,6);
case ANEGF: return FPF(0,7);
case ANEGD: return FPD(0,7);
case ACMPEQF: return FPF(6,2);
case ACMPEQD: return FPD(6,2);
case ACMPGTF: return FPF(7,4);
case ACMPGTD: return FPD(7,4);
case ACMPGEF: return FPF(7,6);
case ACMPGED: return FPD(7,6);
case ADIVV: return OP(3,6);
case ADIVVU: return OP(3,7);
case AADDV: return OP(5,4);
case AADDVU: return OP(5,5);
}
diag("bad rrr %d", a);
return 0;
}
long
opirr(int a)
{
switch(a) {
case AADD: return SP(1,0);
case AADDU: return SP(1,1);
case ASGT: return SP(1,2);
case ASGTU: return SP(1,3);
case AAND: return SP(1,4);
case AOR: return SP(1,5);
case AXOR: return SP(1,6);
case ALAST: return SP(1,7);
case ASLL: return OP(0,0);
case ASRL: return OP(0,2);
case ASRA: return OP(0,3);
case AJMP: return SP(0,2);
case AJAL: return SP(0,3);
case ABEQ: return SP(0,4);
case ABNE: return SP(0,5);
case ABGEZ: return SP(0,1)|BCOND(0,1);
case ABGEZAL: return SP(0,1)|BCOND(2,1);
case ABGTZ: return SP(0,7);
case ABLEZ: return SP(0,6);
case ABLTZ: return SP(0,1)|BCOND(0,0);
case ABLTZAL: return SP(0,1)|BCOND(2,0);
case ABFPT: return SP(2,1)|(257<<16);
case ABFPF: return SP(2,1)|(256<<16);
case AMOVB:
case AMOVBU: return SP(5,0);
case AMOVH:
case AMOVHU: return SP(5,1);
case AMOVW: return SP(5,3);
case AMOVV: return SP(7,7);
case AMOVF: return SP(7,1);
case AMOVWL: return SP(5,2);
case AMOVWR: return SP(5,6);
case AMOVVL: return SP(5,4);
case AMOVVR: return SP(5,5);
case ABREAK: return SP(5,7);
case AMOVWL+ALAST: return SP(4,2);
case AMOVWR+ALAST: return SP(4,6);
case AMOVVL+ALAST: return SP(3,2);
case AMOVVR+ALAST: return SP(3,3);
case AMOVB+ALAST: return SP(4,0);
case AMOVBU+ALAST: return SP(4,4);
case AMOVH+ALAST: return SP(4,1);
case AMOVHU+ALAST: return SP(4,5);
case AMOVW+ALAST: return SP(4,3);
case AMOVV+ALAST: return SP(6,7);
case AMOVF+ALAST: return SP(6,1);
case ASLLV: return OP(7,0);
case ASRLV: return OP(7,2);
case ASRAV: return OP(7,3);
case ASLLV+ALAST: return OP(7,4);
case ASRLV+ALAST: return OP(7,6);
case ASRAV+ALAST: return OP(7,7);
case AADDV: return SP(3,0);
case AADDVU: return SP(3,1);
}
diag("bad irr %d", a);
abort();
return 0;
}
int
vshift(int a)
{
switch(a){
case ASLLV: return 1;
case ASRLV: return 1;
case ASRAV: return 1;
}
return 0;
}