[ia32][wasm] Support AVX instructions for I32x4Splat/ReplaceLane/ExtractLane

src/ia32/disasm-ia32.cc

Index: src/ia32/disasm-ia32.cc
diff --git a/src/ia32/disasm-ia32.cc b/src/ia32/disasm-ia32.cc
index f09d0264ef66e6ee37153ebfdb76577a7f52ff47..22eca9f4fe8042ecd2d1373a797db903a954d885 100644
--- a/src/ia32/disasm-ia32.cc
+++ b/src/ia32/disasm-ia32.cc
@@ -817,6 +817,27 @@ int DisassemblerIA32::AVXInstruction(byte* data) {
       default:
         UnimplementedInstruction();
     }
+  } else if (vex_66() && vex_0f3a()) {
+    int mod, regop, rm, vvvv = vex_vreg();
+    get_modrm(*current, &mod, &regop, &rm);
+    switch (opcode) {
+      case 0x16:
+        AppendToBuffer("vpextrd ");
+        current += PrintRightOperand(current);
+        AppendToBuffer(",%s,%d", NameOfXMMRegister(regop),
+                       *reinterpret_cast<int8_t*>(current));
+        current++;
+        break;
+      case 0x22:
+        AppendToBuffer("vpinsrd %s,%s,", NameOfXMMRegister(regop),
+                       NameOfXMMRegister(vvvv));
+        current += PrintRightOperand(current);
+        AppendToBuffer(",%d", *reinterpret_cast<int8_t*>(current));
+        current++;
+        break;
+      default:
+        UnimplementedInstruction();
+    }
   } else if (vex_f2() && vex_0f()) {
     int mod, regop, rm, vvvv = vex_vreg();
     get_modrm(*current, &mod, &regop, &rm);
@@ -1101,6 +1122,16 @@ int DisassemblerIA32::AVXInstruction(byte* data) {
                        NameOfXMMRegister(vvvv));
         current += PrintRightXMMOperand(current);
         break;
+      case 0x6E:
+        AppendToBuffer("vmovd %s,", NameOfXMMRegister(regop));
+        current += PrintRightOperand(current);
+        break;
+      case 0x70:
+        AppendToBuffer("vpshufd %s,", NameOfXMMRegister(regop));
+        current += PrintRightXMMOperand(current);
+        AppendToBuffer(",%d", *reinterpret_cast<int8_t*>(current));
+        current++;
+        break;
       case 0x71:
         AppendToBuffer("vps%sw %s,%s", sf_str[regop / 2],
                        NameOfXMMRegister(vvvv), NameOfXMMRegister(rm));
@@ -1113,6 +1144,11 @@ int DisassemblerIA32::AVXInstruction(byte* data) {
         current++;
         AppendToBuffer(",%u", *current++);
         break;
+      case 0x7E:
+        AppendToBuffer("vmovd ");
+        current += PrintRightOperand(current);
+        AppendToBuffer(",%s", NameOfXMMRegister(regop));
+        break;
 #define DECLARE_SSE_AVX_DIS_CASE(instruction, notUsed1, notUsed2, opcode) \
   case 0x##opcode: {                                                      \
     AppendToBuffer("v" #instruction " %s,%s,", NameOfXMMRegister(regop),  \
@@ -1850,13 +1886,12 @@ int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer,
             } else if (*data == 0x16) {
               data++;
               int mod, regop, rm;
-              get_modrm(*data, &mod, &rm, &regop);
-              int8_t imm8 = static_cast<int8_t>(data[1]);
-              AppendToBuffer("pextrd %s,%s,%d",
-                             NameOfCPURegister(regop),
-                             NameOfXMMRegister(rm),
-                             static_cast<int>(imm8));
-              data += 2;
+              get_modrm(*data, &mod, &regop, &rm);
+              AppendToBuffer("pextrd ");
+              data += PrintRightOperand(data);
+              AppendToBuffer(",%s,%d", NameOfXMMRegister(regop),
+                             *reinterpret_cast<int8_t*>(data));
+              data++;
             } else if (*data == 0x17) {
               data++;
               int mod, regop, rm;
@@ -1871,12 +1906,10 @@ int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer,
               data++;
               int mod, regop, rm;
               get_modrm(*data, &mod, &regop, &rm);
-              int8_t imm8 = static_cast<int8_t>(data[1]);
-              AppendToBuffer("pinsrd %s,%s,%d",
-                             NameOfXMMRegister(regop),
-                             NameOfCPURegister(rm),
-                             static_cast<int>(imm8));
-              data += 2;
+              AppendToBuffer("pinsrd %s,", NameOfXMMRegister(regop));
+              data += PrintRightOperand(data);
+              AppendToBuffer(",%d", *reinterpret_cast<int8_t*>(data));
+              data++;
             } else {
               UnimplementedInstruction();
             }
@@ -1942,12 +1975,10 @@ int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer,
             data++;
             int mod, regop, rm;
             get_modrm(*data, &mod, &regop, &rm);
-            int8_t imm8 = static_cast<int8_t>(data[1]);
-            AppendToBuffer("pshufd %s,%s,%d",
-                           NameOfXMMRegister(regop),
-                           NameOfXMMRegister(rm),
-                           static_cast<int>(imm8));
-            data += 2;
+            AppendToBuffer("pshufd %s,", NameOfXMMRegister(regop));
+            data += PrintRightXMMOperand(data);
+            AppendToBuffer(",%d", *reinterpret_cast<int8_t*>(data));
+            data++;
           } else if (*data == 0x90) {
             data++;
             AppendToBuffer("nop");  // 2 byte nop.