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KVM: x86 emulator: fix cmov for writeback changes

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The writeback fixes (02c03a326a5df825cc01de426f72e160db2b9538) broke
cmov emulation.  Fix.

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2007-07-20 12:30:58 +03:00
parent 7075bc816c
commit e3243452f4
1 changed files with 11 additions and 11 deletions
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22
drivers/kvm/x86_emulate.c
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@ -1235,40 +1235,40 @@ twobyte_insn:
break; break;
case 0x40 ... 0x4f: /* cmov */ case 0x40 ... 0x4f: /* cmov */
dst.val = dst.orig_val = src.val; dst.val = dst.orig_val = src.val;
d &= ~Mov; /* default to no move */ no_wb = 1;
/* /*
* First, assume we're decoding an even cmov opcode * First, assume we're decoding an even cmov opcode
* (lsb == 0). * (lsb == 0).
*/ */
switch ((b & 15) >> 1) { switch ((b & 15) >> 1) {
case 0: /* cmovo */ case 0: /* cmovo */
d |= (_eflags & EFLG_OF) ? Mov : 0; no_wb = (_eflags & EFLG_OF) ? 0 : 1;
break; break;
case 1: /* cmovb/cmovc/cmovnae */ case 1: /* cmovb/cmovc/cmovnae */
d |= (_eflags & EFLG_CF) ? Mov : 0; no_wb = (_eflags & EFLG_CF) ? 0 : 1;
break; break;
case 2: /* cmovz/cmove */ case 2: /* cmovz/cmove */
d |= (_eflags & EFLG_ZF) ? Mov : 0; no_wb = (_eflags & EFLG_ZF) ? 0 : 1;
break; break;
case 3: /* cmovbe/cmovna */ case 3: /* cmovbe/cmovna */
d |= (_eflags & (EFLG_CF | EFLG_ZF)) ? Mov : 0; no_wb = (_eflags & (EFLG_CF | EFLG_ZF)) ? 0 : 1;
break; break;
case 4: /* cmovs */ case 4: /* cmovs */
d |= (_eflags & EFLG_SF) ? Mov : 0; no_wb = (_eflags & EFLG_SF) ? 0 : 1;
break; break;
case 5: /* cmovp/cmovpe */ case 5: /* cmovp/cmovpe */
d |= (_eflags & EFLG_PF) ? Mov : 0; no_wb = (_eflags & EFLG_PF) ? 0 : 1;
break; break;
case 7: /* cmovle/cmovng */ case 7: /* cmovle/cmovng */
d |= (_eflags & EFLG_ZF) ? Mov : 0; no_wb = (_eflags & EFLG_ZF) ? 0 : 1;
/* fall through */ /* fall through */
case 6: /* cmovl/cmovnge */ case 6: /* cmovl/cmovnge */
d |= (!(_eflags & EFLG_SF) != no_wb &= (!(_eflags & EFLG_SF) !=
!(_eflags & EFLG_OF)) ? Mov : 0; !(_eflags & EFLG_OF)) ? 0 : 1;
break; break;
} }
/* Odd cmov opcodes (lsb == 1) have inverted sense. */ /* Odd cmov opcodes (lsb == 1) have inverted sense. */
d ^= (b & 1) ? Mov : 0; no_wb ^= b & 1;
break; break;
case 0xb0 ... 0xb1: /* cmpxchg */ case 0xb0 ... 0xb1: /* cmpxchg */
/* /*