KVM: x86 emulator: add the emulation of shld and shrd instructions

Add emulation of shld and shrd instructions

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
index 9ae6d5b..219dc31 100644 (file)
--- a/arch/x86/kvm/x86_emulate.c
+++ b/arch/x86/kvm/x86_emulate.c
@@ -237,9 +237,14 @@ static u32 twobyte_table[256] = {
        /* 0x90 - 0x9F */
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        /* 0xA0 - 0xA7 */
-       0, 0, 0, DstMem | SrcReg | ModRM | BitOp, 0, 0, 0, 0,
+       0, 0, 0, DstMem | SrcReg | ModRM | BitOp,
+       DstMem | SrcReg | Src2ImmByte | ModRM,
+       DstMem | SrcReg | Src2CL | ModRM, 0, 0,
        /* 0xA8 - 0xAF */
-       0, 0, 0, DstMem | SrcReg | ModRM | BitOp, 0, 0, ModRM, 0,
+       0, 0, 0, DstMem | SrcReg | ModRM | BitOp,
+       DstMem | SrcReg | Src2ImmByte | ModRM,
+       DstMem | SrcReg | Src2CL | ModRM,
+       ModRM, 0,
        /* 0xB0 - 0xB7 */
        ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, 0,
            DstMem | SrcReg | ModRM | BitOp,
@@ -2037,12 +2042,20 @@ twobyte_insn:
                c->src.val &= (c->dst.bytes << 3) - 1;
                emulate_2op_SrcV_nobyte("bt", c->src, c->dst, ctxt->eflags);
                break;
+       case 0xa4: /* shld imm8, r, r/m */
+       case 0xa5: /* shld cl, r, r/m */
+               emulate_2op_cl("shld", c->src2, c->src, c->dst, ctxt->eflags);
+               break;
        case 0xab:
              bts:              /* bts */
                /* only subword offset */
                c->src.val &= (c->dst.bytes << 3) - 1;
                emulate_2op_SrcV_nobyte("bts", c->src, c->dst, ctxt->eflags);
                break;
+       case 0xac: /* shrd imm8, r, r/m */
+       case 0xad: /* shrd cl, r, r/m */
+               emulate_2op_cl("shrd", c->src2, c->src, c->dst, ctxt->eflags);
+               break;
        case 0xae:              /* clflush */
                break;
        case 0xb0 ... 0xb1:     /* cmpxchg */