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x86: fix daa opcode for al register values higher than 0xf9 

The second if statement should consider the original al register value,
and not the new one.

Signed-off-by: Boris Figovsky <boris.figovksy@ravellosystems.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This commit is contained in:
Boris Figovsky 2011-08-30 10:00:55 +03:00 committed by Stefan Hajnoczi
parent 6f9faa91f5
commit c6bfc164e8
1 changed files with 3 additions and 3 deletions
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6
target-i386/op_helper.c
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@ -1970,20 +1970,20 @@ void helper_aas(void)
void helper_daa(void)
{
int al, af, cf;
int old_al, al, af, cf;
int eflags;
eflags = helper_cc_compute_all(CC_OP);
cf = eflags & CC_C;
af = eflags & CC_A;
al = EAX & 0xff;
old_al = al = EAX & 0xff;
eflags = 0;
if (((al & 0x0f) > 9 ) || af) {
al = (al + 6) & 0xff;
eflags |= CC_A;
}
if ((al > 0x9f) || cf) {
if ((old_al > 0x99) || cf) {
al = (al + 0x60) & 0xff;
eflags |= CC_C;
}