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fxam fix (Julian Seward)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1997 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2006-06-19 22:43:38 +00:00
parent b2a8e59224
commit a891c7a194
1 changed files with 5 additions and 0 deletions
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5
target-i386/helper.c
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@ -2950,9 +2950,14 @@ void helper_fxam_ST0(void)
if (SIGND(temp))
env->fpus |= 0x200; /* C1 <-- 1 */
/* XXX: test fptags too */
expdif = EXPD(temp);
if (expdif == MAXEXPD) {
#ifdef USE_X86LDOUBLE
if (MANTD(temp) == 0x8000000000000000ULL)
#else
if (MANTD(temp) == 0)
#endif
env->fpus |= 0x500 /*Infinity*/;
else
env->fpus |= 0x100 /*NaN*/;