MIPS: [compiler] [wasm] Introduce Word32/64ReverseBytes as TF Optional Opcode.

src/compiler/mips64/instruction-selector-mips64.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/base/adapters.h"
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 561 matching lines @@
 void InstructionSelector::VisitWord32Clz(Node* node) {
   VisitRR(this, kMips64Clz, node);
 }
 
 
 void InstructionSelector::VisitWord32ReverseBits(Node* node) { UNREACHABLE(); }
 
 
 void InstructionSelector::VisitWord64ReverseBits(Node* node) { UNREACHABLE(); }
 
-void InstructionSelector::VisitWord64ReverseBytes(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitWord64ReverseBytes(Node* node) {
+  Mips64OperandGenerator g(this);
+  Emit(kMips64ByteSwap64, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
 
-void InstructionSelector::VisitWord32ReverseBytes(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitWord32ReverseBytes(Node* node) {
+  Mips64OperandGenerator g(this);
+  Emit(kMips64ByteSwap32, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
 
 void InstructionSelector::VisitWord32Ctz(Node* node) {
   Mips64OperandGenerator g(this);
   Emit(kMips64Ctz, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
 }
 
 
 void InstructionSelector::VisitWord64Ctz(Node* node) {
   Mips64OperandGenerator g(this);
   Emit(kMips64Dctz, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
@@ skipping 1523 matching lines @@
          MachineOperatorBuilder::kWord32ShiftIsSafe |
          MachineOperatorBuilder::kInt32DivIsSafe |
          MachineOperatorBuilder::kUint32DivIsSafe |
          MachineOperatorBuilder::kFloat64RoundDown |
          MachineOperatorBuilder::kFloat32RoundDown |
          MachineOperatorBuilder::kFloat64RoundUp |
          MachineOperatorBuilder::kFloat32RoundUp |
          MachineOperatorBuilder::kFloat64RoundTruncate |
          MachineOperatorBuilder::kFloat32RoundTruncate |
          MachineOperatorBuilder::kFloat64RoundTiesEven |
-         MachineOperatorBuilder::kFloat32RoundTiesEven;
+         MachineOperatorBuilder::kFloat32RoundTiesEven |
+         MachineOperatorBuilder::kWord32ReverseBytes |
+         MachineOperatorBuilder::kWord64ReverseBytes;
 }
 
 // static
 MachineOperatorBuilder::AlignmentRequirements
 InstructionSelector::AlignmentRequirements() {
   if (kArchVariant == kMips64r6) {
     return MachineOperatorBuilder::AlignmentRequirements::
         FullUnalignedAccessSupport();
   } else {
     DCHECK(kArchVariant == kMips64r2);
     return MachineOperatorBuilder::AlignmentRequirements::
         NoUnalignedAccessSupport();
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8