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>

1 files changed, 15 insertions, 2 deletions

diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
index 9ae6d5b3e962..219dc3110bf1 100644
--- 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 */