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x86-64: Make ABI for long double compatible with GCC.

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- Now we use x87's stack top the long double return values.
- Add rc_fret and reg_fret, wrapper functions for RC_FRET and REG_FRET.
- Add a test case to check if strto* works OK.
This commit is contained in:
Shinichiro Hamaji
2009-04-14 01:12:29 +09:00
committed by grischka
parent 0e239e2ba5
commit 9fe28b610e
2 changed files with 31 additions and 3 deletions
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28
tcc.c
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@ -5180,6 +5180,28 @@ void gv2(int rc1, int rc2)
}
}
/* wrapper around RC_FRET to return a register by type */
int rc_fret(int t)
{
#ifdef TCC_TARGET_X86_64
if (t == VT_LDOUBLE) {
return TREG_ST0;
}
#endif
return RC_FRET;
}
/* wrapper around REG_FRET to return a register by type */
int reg_fret(int t)
{
#ifdef TCC_TARGET_X86_64
if (t == VT_LDOUBLE) {
return TREG_ST0;
}
#endif
return REG_FRET;
}
/* expand long long on stack in two int registers */
void lexpand(void)
{
@ -6014,7 +6036,7 @@ void gen_cvt_itof1(int t)
vrott(2);
gfunc_call(1);
vpushi(0);
vtop->r = REG_FRET;
vtop->r = reg_fret(t);
} else {
gen_cvt_itof(t);
}
@ -7942,7 +7964,7 @@ static void unary(void)
ret.type = s->type;
/* return in register */
if (is_float(ret.type.t)) {
ret.r = REG_FRET;
ret.r = reg_fret(ret.type.t);
} else {
if ((ret.type.t & VT_BTYPE) == VT_LLONG)
ret.r2 = REG_LRET;
@ -8524,7 +8546,7 @@ static void block(int *bsym, int *csym, int *case_sym, int *def_sym,
}
#endif
} else if (is_float(func_vt.t)) {
gv(RC_FRET);
gv(rc_fret(func_vt.t));
} else {
gv(RC_IRET);
}