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cmpxchg fixes

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4755 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2008-06-20 14:18:35 +00:00
parent caa88be0f5
commit 278ed7c329
1 changed files with 7 additions and 0 deletions
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7
target-i386/op_helper.c
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@ -1837,6 +1837,8 @@ void helper_cmpxchg8b(target_ulong a0)
stq(a0, ((uint64_t)ECX << 32) | (uint32_t)EBX);
eflags |= CC_Z;
} else {
/* always do the store */
stq(a0, d);
EDX = (uint32_t)(d >> 32);
EAX = (uint32_t)d;
eflags &= ~CC_Z;
@ -1850,6 +1852,8 @@ void helper_cmpxchg16b(target_ulong a0)
uint64_t d0, d1;
int eflags;
if ((a0 & 0xf) != 0)
raise_exception(EXCP0D_GPF);
eflags = cc_table[CC_OP].compute_all();
d0 = ldq(a0);
d1 = ldq(a0 + 8);
@ -1858,6 +1862,9 @@ void helper_cmpxchg16b(target_ulong a0)
stq(a0 + 8, ECX);
eflags |= CC_Z;
} else {
/* always do the store */
stq(a0, d0);
stq(a0 + 8, d1);
EDX = d1;
EAX = d0;
eflags &= ~CC_Z;