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Avoid host FPE for overflowing division on MIPS, by Richard Sandiford.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3856 c046a42c-6fe2-441c-8c8c-71466251a162
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ths 2007-12-25 03:18:19 +00:00
parent 6d35524c40
commit 306ab3e86a
1 changed files with 10 additions and 3 deletions
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13
target-mips/op_helper.c
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@ -230,9 +230,16 @@ void do_div (void)
void do_ddiv (void)
{
if (T1 != 0) {
lldiv_t res = lldiv((int64_t)T0, (int64_t)T1);
env->LO[0][env->current_tc] = res.quot;
env->HI[0][env->current_tc] = res.rem;
int64_t arg0 = (int64_t)T0;
int64_t arg1 = (int64_t)T1;
if (arg0 == ((int64_t)-1 << 63) && arg1 == (int64_t)-1) {
env->LO[0][env->current_tc] = arg0;
env->HI[0][env->current_tc] = 0;
} else {
lldiv_t res = lldiv(arg0, arg1);
env->LO[0][env->current_tc] = res.quot;
env->HI[0][env->current_tc] = res.rem;
}
}
}