[x64] Emit vmovss when AVX is enabled.

src/x64/disasm-x64.cc

Index: src/x64/disasm-x64.cc
diff --git a/src/x64/disasm-x64.cc b/src/x64/disasm-x64.cc
index eab5cac9c1dd4c82b42c261a828b0d64348087a9..eef1b8b226500d8ef3811afdcbb104fd283d1869 100644
--- a/src/x64/disasm-x64.cc
+++ b/src/x64/disasm-x64.cc
@@ -956,6 +956,15 @@ int DisassemblerX64::AVXInstruction(byte* data) {
     int mod, regop, rm, vvvv = vex_vreg();
     get_modrm(*current, &mod, &regop, &rm);
     switch (opcode) {
+      case 0x10:
+        AppendToBuffer("vmovss %s,", NameOfXMMRegister(regop));
+        current += PrintRightXMMOperand(current);
+        break;
+      case 0x11:
+        AppendToBuffer("vmovss ");
+        current += PrintRightXMMOperand(current);
+        AppendToBuffer(",%s", NameOfXMMRegister(regop));
+        break;
       case 0x58:
         AppendToBuffer("vaddss %s,%s,", NameOfXMMRegister(regop),
                        NameOfXMMRegister(vvvv));