KVM: x86 emulator: fix cmov for writeback changes

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

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index db9f955..82b4ea6 100644 (file)
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -1235,40 +1235,40 @@ twobyte_insn:
                break;
        case 0x40 ... 0x4f:     /* cmov */
                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
                 * (lsb == 0).
                 */
                switch ((b & 15) >> 1) {
                case 0: /* cmovo */
-                       d |= (_eflags & EFLG_OF) ? Mov : 0;
+                       no_wb = (_eflags & EFLG_OF) ? 0 : 1;
                        break;
                case 1: /* cmovb/cmovc/cmovnae */
-                       d |= (_eflags & EFLG_CF) ? Mov : 0;
+                       no_wb = (_eflags & EFLG_CF) ? 0 : 1;
                        break;
                case 2: /* cmovz/cmove */
-                       d |= (_eflags & EFLG_ZF) ? Mov : 0;
+                       no_wb = (_eflags & EFLG_ZF) ? 0 : 1;
                        break;
                case 3: /* cmovbe/cmovna */
-                       d |= (_eflags & (EFLG_CF | EFLG_ZF)) ? Mov : 0;
+                       no_wb = (_eflags & (EFLG_CF | EFLG_ZF)) ? 0 : 1;
                        break;
                case 4: /* cmovs */
-                       d |= (_eflags & EFLG_SF) ? Mov : 0;
+                       no_wb = (_eflags & EFLG_SF) ? 0 : 1;
                        break;
                case 5: /* cmovp/cmovpe */
-                       d |= (_eflags & EFLG_PF) ? Mov : 0;
+                       no_wb = (_eflags & EFLG_PF) ? 0 : 1;
                        break;
                case 7: /* cmovle/cmovng */
-                       d |= (_eflags & EFLG_ZF) ? Mov : 0;
+                       no_wb = (_eflags & EFLG_ZF) ? 0 : 1;
                        /* fall through */
                case 6: /* cmovl/cmovnge */
-                       d |= (!(_eflags & EFLG_SF) !=
-                             !(_eflags & EFLG_OF)) ? Mov : 0;
+                       no_wb &= (!(_eflags & EFLG_SF) !=
+                             !(_eflags & EFLG_OF)) ? 0 : 1;
                        break;
                }
                /* Odd cmov opcodes (lsb == 1) have inverted sense. */
-               d ^= (b & 1) ? Mov : 0;
+               no_wb ^= b & 1;
                break;
        case 0xb0 ... 0xb1:     /* cmpxchg */
                /*