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replace original float instruction with jump to make branches

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to float instructions work correctly.

R=rsc
CC=golang-dev
https://golang.org/cl/870044
This commit is contained in:
Kai Backman 2010-04-06 22:17:24 +03:00
parent b26a7a2b88
commit 29c6c09f71
1 changed files with 12 additions and 11 deletions
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23
src/cmd/5l/softfloat.c
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@ -8,7 +8,7 @@
void
softfloat()
{
Prog *p, *prev, *psfloat;
Prog *p, *next, *psfloat;
Sym *symsfloat;
int wasfloat;
@ -26,7 +26,6 @@ softfloat()
wasfloat = 0;
p = firstp;
prev = P;
for(p = firstp; p != P; p = p->link) {
switch(p->as) {
case AMOVWD:
@ -50,21 +49,23 @@ softfloat()
if (psfloat == P)
diag("floats used with _sfloat not defined");
if (!wasfloat) {
if (prev == P)
diag("float instruction without predecessor TEXT");
// BL _sfloat(SB)
prev = appendp(prev);
prev->as = ABL;
prev->to.type = D_BRANCH;
prev->to.sym = symsfloat;
prev->cond = psfloat;
next = prg();
*next = *p;
// BL _sfloat(SB)
*p = zprg;
p->link = next;
p->as = ABL;
p->to.type = D_BRANCH;
p->to.sym = symsfloat;
p->cond = psfloat;
p = next;
wasfloat = 1;
}
break;
default:
wasfloat = 0;
}
prev = p;
}
}