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

src/compiler/mips/instruction-selector-mips.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 464 matching lines @@
 
 void InstructionSelector::VisitWord32Clz(Node* node) {
   VisitRR(this, kMipsClz, node);
 }
 
 
 void InstructionSelector::VisitWord32ReverseBits(Node* node) { UNREACHABLE(); }
 
 void InstructionSelector::VisitWord64ReverseBytes(Node* node) { UNREACHABLE(); }
 
-void InstructionSelector::VisitWord32ReverseBytes(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitWord32ReverseBytes(Node* node) {
+  MipsOperandGenerator g(this);
+  Emit(kMipsByteSwap32, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
 
 void InstructionSelector::VisitWord32Ctz(Node* node) {
   MipsOperandGenerator g(this);
   Emit(kMipsCtz, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
 }
 
 
 void InstructionSelector::VisitWord32Popcnt(Node* node) {
   MipsOperandGenerator g(this);
   Emit(kMipsPopcnt, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
@@ skipping 1116 matching lines @@
   }
 
   return flags | MachineOperatorBuilder::kWord32Ctz |
          MachineOperatorBuilder::kWord32Popcnt |
          MachineOperatorBuilder::kInt32DivIsSafe |
          MachineOperatorBuilder::kUint32DivIsSafe |
          MachineOperatorBuilder::kWord32ShiftIsSafe |
          MachineOperatorBuilder::kFloat32RoundDown |
          MachineOperatorBuilder::kFloat32RoundUp |
          MachineOperatorBuilder::kFloat32RoundTruncate |
-         MachineOperatorBuilder::kFloat32RoundTiesEven;
+         MachineOperatorBuilder::kFloat32RoundTiesEven |
+         MachineOperatorBuilder::kWord32ReverseBytes |
+         MachineOperatorBuilder::kWord64ReverseBytes;
 }
 
 // static
 MachineOperatorBuilder::AlignmentRequirements
 InstructionSelector::AlignmentRequirements() {
   if (IsMipsArchVariant(kMips32r6)) {
     return MachineOperatorBuilder::AlignmentRequirements::
         FullUnalignedAccessSupport();
   } else {
     DCHECK(IsMipsArchVariant(kLoongson) || IsMipsArchVariant(kMips32r1) ||
            IsMipsArchVariant(kMips32r2));
     return MachineOperatorBuilder::AlignmentRequirements::
         NoUnalignedAccessSupport();
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8