MIPS: Fix several failures due to unsupported Sed and Seh innstructions on MIPS32R1

src/mips/macro-assembler-mips.h

 // Copyright 2012 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.
 
 #ifndef V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 #define V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 
 #include "src/assembler.h"
 #include "src/globals.h"
 #include "src/mips/assembler-mips.h"
@@ skipping 815 matching lines @@
   // Store value in register src in the safepoint stack slot for
   // register dst.
   void StoreToSafepointRegisterSlot(Register src, Register dst);
   // Load the value of the src register from its safepoint stack slot
   // into register dst.
   void LoadFromSafepointRegisterSlot(Register dst, Register src);
 
   // MIPS32 R2 instruction macro.
   void Ins(Register rt, Register rs, uint16_t pos, uint16_t size);
   void Ext(Register rt, Register rs, uint16_t pos, uint16_t size);
+  void Seb(Register rd, Register rt);
+  void Seh(Register rd, Register rt);
   void Neg_s(FPURegister fd, FPURegister fs);
   void Neg_d(FPURegister fd, FPURegister fs);
 
   // MIPS32 R6 instruction macros.
   void Bovc(Register rt, Register rs, Label* L);
   void Bnvc(Register rt, Register rs, Label* L);
 
   // Int64Lowering instructions
   void AddPair(Register dst_low, Register dst_high, Register left_low,
                Register left_high, Register right_low, Register right_high);
@@ skipping 1059 matching lines @@
     dd(GetLabelFunction(index));
   }
 }
 
 #define ACCESS_MASM(masm) masm->
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_