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

src/compiler/mips/code-generator-mips.cc

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index 073c9f560c572738e596d8756a20010ae082f015..2fc6fd59bfe9afabde0df3f7e0376eb9b2dff0d4 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -1437,6 +1437,10 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       }
       break;
     }
+    case kMipsByteSwap32: {
+      __ ByteSwapSigned(i.OutputRegister(0), i.InputRegister(0), 4);
+      break;
+    }
     case kCheckedLoadInt8:
       ASSEMBLE_CHECKED_LOAD_INTEGER(lb);
       break;