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

src/compiler/mips64/code-generator-mips64.cc

Index: src/compiler/mips64/code-generator-mips64.cc
diff --git a/src/compiler/mips64/code-generator-mips64.cc b/src/compiler/mips64/code-generator-mips64.cc
index ba956f9cc76dc81c2ea6518963c6d226c9a6ce26..5519d6b41f39755ac17030043cdf197513e1e3fe 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -1734,6 +1734,15 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       }
       break;
     }
+    case kMips64ByteSwap64: {
+      __ ByteSwapSigned(i.OutputRegister(0), i.InputRegister(0), 8);
+      break;
+    }
+    case kMips64ByteSwap32: {
+      __ ByteSwapUnsigned(i.OutputRegister(0), i.InputRegister(0), 4);
+      __ dsrl32(i.OutputRegister(0), i.OutputRegister(0), 0);
+      break;
+    }
     case kCheckedLoadInt8:
       ASSEMBLE_CHECKED_LOAD_INTEGER(lb);
       break;