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

src/compiler/s390/instruction-scheduler-s390.cc

 // Copyright 2015 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/instruction-scheduler.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 102 matching lines @@
     case kS390_DoubleToFloat32:
     case kS390_DoubleExtractLowWord32:
     case kS390_DoubleExtractHighWord32:
     case kS390_DoubleInsertLowWord32:
     case kS390_DoubleInsertHighWord32:
     case kS390_DoubleConstruct:
     case kS390_BitcastInt32ToFloat32:
     case kS390_BitcastFloat32ToInt32:
     case kS390_BitcastInt64ToDouble:
     case kS390_BitcastDoubleToInt64:
+    case kS390_LoadReverse16RR:
+    case kS390_LoadReverse32RR:
+    case kS390_LoadReverse64RR:
       return kNoOpcodeFlags;
 
     case kS390_LoadWordS8:
     case kS390_LoadWordU8:
     case kS390_LoadWordS16:
     case kS390_LoadWordU16:
     case kS390_LoadWordS32:
     case kS390_LoadWordU32:
     case kS390_LoadWord64:
     case kS390_LoadFloat32:
     case kS390_LoadDouble:
+    case kS390_LoadReverse16:
+    case kS390_LoadReverse32:
+    case kS390_LoadReverse64:
       return kIsLoadOperation;
 
     case kS390_StoreWord8:
     case kS390_StoreWord16:
     case kS390_StoreWord32:
     case kS390_StoreWord64:
+    case kS390_StoreReverse16:
+    case kS390_StoreReverse32:
+    case kS390_StoreReverse64:
     case kS390_StoreFloat32:
     case kS390_StoreDouble:
     case kS390_Push:
     case kS390_PushFrame:
     case kS390_StoreToStackSlot:
       return kHasSideEffect;
 
 #define CASE(Name) case k##Name:
       COMMON_ARCH_OPCODE_LIST(CASE)
 #undef CASE
       // Already covered in architecture independent code.
       UNREACHABLE();
   }
 
   UNREACHABLE();
   return kNoOpcodeFlags;
 }
 
 int InstructionScheduler::GetInstructionLatency(const Instruction* instr) {
   // TODO(all): Add instruction cost modeling.
   return 1;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8