[WASM SIMD] Implement packing and unpacking integer conversions.

src/wasm/wasm-opcodes.cc

 // Copyright 2015 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 "src/wasm/wasm-opcodes.h"
 #include "src/messages.h"
 #include "src/runtime/runtime.h"
 #include "src/signature.h"
 
 namespace v8 {
@@ skipping 173 matching lines @@
     CASE_F32x4_OP(Min, "min")
     CASE_F32x4_OP(Max, "max")
     CASE_F32x4_OP(MinNum, "min_num")
     CASE_F32x4_OP(MaxNum, "max_num")
     CASE_F32x4_OP(Lt, "lt")
     CASE_F32x4_OP(Le, "le")
     CASE_F32x4_OP(Gt, "gt")
     CASE_F32x4_OP(Ge, "ge")
     CASE_CONVERT_OP(Convert, F32x4, I32x4, "i32", "convert")
     CASE_CONVERT_OP(Convert, I32x4, F32x4, "f32", "convert")
+    CASE_CONVERT_OP(Convert, I32x4, I16x8Low, "i32", "convert")
+    CASE_CONVERT_OP(Convert, I32x4, I16x8High, "i32", "convert")
+    CASE_CONVERT_OP(Convert, I16x8, I32x4, "i32", "convert")
+    CASE_CONVERT_OP(Convert, I16x8, I8x16Low, "i32", "convert")
+    CASE_CONVERT_OP(Convert, I16x8, I8x16High, "i32", "convert")
+    CASE_CONVERT_OP(Convert, I8x16, I16x8, "i32", "convert")
     CASE_F32x4_OP(ExtractLane, "extract_lane")
     CASE_F32x4_OP(ReplaceLane, "replace_lane")
     CASE_SIMDI_OP(ExtractLane, "extract_lane")
     CASE_SIMDI_OP(ReplaceLane, "replace_lane")
     CASE_SIGN_OP(SIMDI, Min, "min")
     CASE_SIGN_OP(SIMDI, Max, "max")
     CASE_SIGN_OP(SIMDI, Lt, "lt")
     CASE_SIGN_OP(SIMDI, Le, "le")
     CASE_SIGN_OP(SIMDI, Gt, "gt")
     CASE_SIGN_OP(SIMDI, Ge, "ge")
@@ skipping 192 matching lines @@
       return MessageTemplate::kNone;
   }
 }
 
 const char* WasmOpcodes::TrapReasonMessage(TrapReason reason) {
   return MessageTemplate::TemplateString(TrapReasonToMessageId(reason));
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8