[x64] Implemennt vroundsd AVX instruction.

src/x64/disasm-x64.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <assert.h>
 #include <stdarg.h>
 #include <stdio.h>
 
 #if V8_TARGET_ARCH_X64
 
@@ skipping 934 matching lines @@
         break;
       case 0xf7:
         AppendToBuffer("shlx%c %s,", operand_size_code(),
                        NameOfCPURegister(regop));
         current += PrintRightOperand(current);
         AppendToBuffer(",%s", NameOfCPURegister(vvvv));
         break;
       default:
         UnimplementedInstruction();
     }
+  } else if (vex_66() && vex_0f3a()) {
+    int mod, regop, rm, vvvv = vex_vreg();
+    get_modrm(*current, &mod, &regop, &rm);
+    switch (opcode) {
+      case 0x0b:
+        AppendToBuffer("vroundsd %s,%s,", NameOfXMMRegister(regop),
+                       NameOfXMMRegister(vvvv));
+        current += PrintRightXMMOperand(current);
+        AppendToBuffer(",0x%x", *current++);
+        break;
+      default:
+        UnimplementedInstruction();
+    }
   } else if (vex_f3() && vex_0f()) {
     int mod, regop, rm, vvvv = vex_vreg();
     get_modrm(*current, &mod, &regop, &rm);
     switch (opcode) {
       case 0x10:
         AppendToBuffer("vmovss %s,", NameOfXMMRegister(regop));
         if (mod == 3) {
           AppendToBuffer("%s,", NameOfXMMRegister(vvvv));
         }
         current += PrintRightXMMOperand(current);
@@ skipping 521 matching lines @@
         get_modrm(*current, &mod, &regop, &rm);
         AppendToBuffer("extractps ");  // reg/m32, xmm, imm8
         current += PrintRightOperand(current);
         AppendToBuffer(",%s,%d", NameOfXMMRegister(regop), (*current) & 3);
         current += 1;
       } else if (third_byte == 0x0b) {
         get_modrm(*current, &mod, &regop, &rm);
          // roundsd xmm, xmm/m64, imm8
         AppendToBuffer("roundsd %s,", NameOfXMMRegister(regop));
         current += PrintRightXMMOperand(current);
-        AppendToBuffer(",%d", (*current) & 3);
+        AppendToBuffer(",0x%x", (*current) & 3);
         current += 1;
       } else if (third_byte == 0x16) {
         get_modrm(*current, &mod, &rm, &regop);
         AppendToBuffer("pextrd ");  // reg/m32, xmm, imm8
         current += PrintRightOperand(current);
         AppendToBuffer(",%s,%d", NameOfXMMRegister(regop), (*current) & 3);
         current += 1;
       } else if (third_byte == 0x22) {
         get_modrm(*current, &mod, &regop, &rm);
         AppendToBuffer("pinsrd ");  // xmm, reg/m32, imm8
@@ skipping 952 matching lines @@
     for (int i = 6 - static_cast<int>(pc - prev_pc); i >= 0; i--) {
       fprintf(f, "  ");
     }
     fprintf(f, "  %s\n", buffer.start());
   }
 }
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_X64