[wasm] Implement I32x4ReplaceLane, I32x4Add, I32x4Sub.

src/compiler/common-operator.cc

 // Copyright 2014 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/compiler/common-operator.h"
 
 #include "src/assembler.h"
 #include "src/base/lazy-instance.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/opcodes.h"
@@ skipping 1113 matching lines @@
   } else if (op->opcode() == IrOpcode::kMerge) {
     return Merge(size);
   } else if (op->opcode() == IrOpcode::kLoop) {
     return Loop(size);
   } else {
     UNREACHABLE();
     return nullptr;
   }
 }
 
+const Operator* CommonOperatorBuilder::Int32x4ExtractLane(int32_t value) {

[titzer, 2016/12/05 09:40:08]

Can we call this lane_number?

[gdeepti, 2016/12/06 01:10:08]

Done.

+  return new (zone()) Operator1<int32_t>(              // --

[titzer, 2016/12/05 09:40:08]

Can we get a DCHECK that 0 <= lane_number < 4?

[gdeepti, 2016/12/06 01:10:08]

Done.

+      IrOpcode::kInt32x4ExtractLane, Operator::kPure,  // opcode
+      "Int32x4ExtractLane",                            // name
+      1, 0, 0, 1, 0, 0,                                // counts
+      value);                                          // parameter
+}
+
+const Operator* CommonOperatorBuilder::Int32x4ReplaceLane(int32_t value) {
+  return new (zone()) Operator1<int32_t>(              // --
+      IrOpcode::kInt32x4ReplaceLane, Operator::kPure,  // opcode
+      "Int32x4ReplaceLane",                            // name
+      2, 0, 0, 1, 0, 0,                                // counts
+      value);                                          // parameter
+}
+
+const Operator* CommonOperatorBuilder::Float32x4ExtractLane(int32_t value) {
+  return new (zone()) Operator1<int32_t>(                // --
+      IrOpcode::kFloat32x4ExtractLane, Operator::kPure,  // opcode
+      "Float32x4ExtractLane",                            // name
+      1, 0, 0, 1, 0, 0,                                  // counts
+      value);                                            // parameter
+}
 
 const FrameStateFunctionInfo*
 CommonOperatorBuilder::CreateFrameStateFunctionInfo(
     FrameStateType type, int parameter_count, int local_count,
     Handle<SharedFunctionInfo> shared_info) {
   return new (zone()->New(sizeof(FrameStateFunctionInfo)))
       FrameStateFunctionInfo(type, parameter_count, local_count, shared_info);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8