void
zaddr(Gen *a, int s)
{
int32_t l;
int i;
char *n;
Ieee e;
Bputc(&obuf, a->type);
Bputc(&obuf, a->reg);
Bputc(&obuf, s);
Bputc(&obuf, a->name);
switch(a->type) {
default:
print("unknown type %d\n", a->type);
exits("arg");
case D_NONE:
case D_REG:
case D_FREG:
case D_PSR:
case D_FPCR:
break;
case D_REGREG:
Bputc(&obuf, a->offset);
break;
case D_OREG:
case D_CONST:
case D_BRANCH:
case D_SHIFT:
l = a->offset;
Bputc(&obuf, l);
Bputc(&obuf, l>>8);
Bputc(&obuf, l>>16);
Bputc(&obuf, l>>24);
break;
case D_SCONST:
n = a->sval;
for(i=0; i<NSNAME; i++) {
Bputc(&obuf, *n);
n++;
}
break;
case D_FCONST:
ieeedtod(&e, a->dval);
Bputc(&obuf, e.l);
Bputc(&obuf, e.l>>8);
Bputc(&obuf, e.l>>16);
Bputc(&obuf, e.l>>24);
Bputc(&obuf, e.h);
Bputc(&obuf, e.h>>8);
Bputc(&obuf, e.h>>16);
Bputc(&obuf, e.h>>24);
break;
}
}
void
ieeedtod(uint64 *ieee, double native)
{
double fr, ho, f;
int exp;
uint32 h, l;
uint64 bits;
if(native < 0) {
ieeedtod(ieee, -native);
*ieee |= 1ULL<<63;
return;
}
if(native == 0) {
*ieee = 0;
return;
}
fr = frexp(native, &exp);
f = 2097152L; /* shouldn't use fp constants here */
fr = modf(fr*f, &ho);
h = ho;
h &= 0xfffffL;
f = 65536L;
fr = modf(fr*f, &ho);
l = ho;
l <<= 16;
l |= (int32)(fr*f);
bits = ((uint64)h<<32) | l;
if(exp < -1021) {
// gradual underflow
bits |= 1LL<<52;
bits >>= -1021 - exp;
exp = -1022;
}
void
zaddr(Gen *a, int s)
{
int32 l;
int i, t;
char *n;
Ieee e;
t = 0;
if(a->index != D_NONE || a->scale != 0)
t |= T_INDEX;
if(a->offset != 0)
t |= T_OFFSET;
if(s != 0)
t |= T_SYM;
switch(a->type) {
default:
t |= T_TYPE;
break;
case D_FCONST:
t |= T_FCONST;
break;
case D_CONST2:
t |= T_OFFSET|T_OFFSET2;
break;
case D_SCONST:
t |= T_SCONST;
break;
case D_NONE:
break;
}
BPUTC(&obuf, t);
if(t & T_INDEX) { /* implies index, scale */
BPUTC(&obuf, a->index);
BPUTC(&obuf, a->scale);
}
if(t & T_OFFSET) { /* implies offset */
l = a->offset;
BPUTLE4(&obuf, l);
}
if(t & T_OFFSET2) {
l = a->offset2;
BPUTLE4(&obuf, l);
}
if(t & T_SYM) /* implies sym */
BPUTC(&obuf, s);
if(t & T_FCONST) {
ieeedtod(&e, a->dval);
BPUTLE4(&obuf, e.l);
BPUTLE4(&obuf, e.h);
return;
}
if(t & T_SCONST) {
n = a->sval;
for(i=0; i<NSNAME; i++) {
BPUTC(&obuf, *n);
n++;
}
return;
}
if(t & T_TYPE)
BPUTC(&obuf, a->type);
}
void
zaddr(Biobuf *b, Addr *a, int s, int gotype)
{
int32 l;
uint64 e;
int i, t;
char *n;
t = 0;
if(a->index != D_NONE || a->scale != 0)
t |= T_INDEX;
if(s != 0)
t |= T_SYM;
if(gotype != 0)
t |= T_GOTYPE;
switch(a->type) {
case D_BRANCH:
if(a->u.branch == nil)
fatal("unpatched branch");
a->offset = a->u.branch->loc;
default:
t |= T_TYPE;
case D_NONE:
if(a->offset != 0)
t |= T_OFFSET;
if(a->offset2 != 0)
t |= T_OFFSET2;
break;
case D_FCONST:
t |= T_FCONST;
break;
case D_SCONST:
t |= T_SCONST;
break;
}
BPUTC(b, t);
if(t & T_INDEX) { /* implies index, scale */
BPUTC(b, a->index);
BPUTC(b, a->scale);
}
if(t & T_OFFSET) { /* implies offset */
l = a->offset;
BPUTLE4(b, l);
}
if(t & T_OFFSET2) { /* implies offset */
l = a->offset2;
BPUTLE4(b, l);
}
if(t & T_SYM) /* implies sym */
BPUTC(b, s);
if(t & T_FCONST) {
ieeedtod(&e, a->u.dval);
BPUTLE4(b, e);
BPUTLE4(b, e >> 32);
return;
}
void
zaddr(Biobuf *b, Addr *a, int s, int gotype)
{
int32 l;
uint64 e;
int i;
char *n;
switch(a->type) {
case D_STATIC:
case D_AUTO:
case D_EXTERN:
case D_PARAM:
// TODO(kaib): remove once everything seems to work
fatal("We should no longer generate these as types");
default:
BPUTC(b, a->type);
BPUTC(b, a->reg);
BPUTC(b, s);
BPUTC(b, a->name);
BPUTC(b, gotype);
}
switch(a->type) {
default:
print("unknown type %d in zaddr\n", a->type);
case D_NONE:
case D_REG:
case D_FREG:
case D_PSR:
break;
case D_CONST2:
l = a->offset2;
BPUTLE4(b, l); // fall through
case D_OREG:
case D_CONST:
case D_SHIFT:
case D_STATIC:
case D_AUTO:
case D_EXTERN:
case D_PARAM:
l = a->offset;
BPUTLE4(b, l);
break;
case D_BRANCH:
if(a->u.branch == nil)
fatal("unpatched branch");
a->offset = a->u.branch->loc;
l = a->offset;
BPUTLE4(b, l);
break;
case D_SCONST:
n = a->u.sval;
for(i=0; i<NSNAME; i++) {
BPUTC(b, *n);
n++;
}
break;
case D_REGREG:
case D_REGREG2:
BPUTC(b, a->offset);
break;
case D_FCONST:
ieeedtod(&e, a->u.dval);
BPUTLE4(b, e);
BPUTLE4(b, e >> 32);
break;
}
}