MIPS: Improve performance of simulator in debug mode.

src/mips/constants-mips.cc

 // Copyright 2011 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.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/mips/constants-mips.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 105 matching lines @@
       return aliases_[i].creg;
     }
     i++;
   }
 
   // No Cregister with the reguested name found.
   return kInvalidFPURegister;
 }
 
 
-// -----------------------------------------------------------------------------
-// Instructions.
-
-bool Instruction::IsForbiddenAfterBranchInstr(Instr instr) {
-  Opcode opcode = static_cast<Opcode>(instr & kOpcodeMask);
-  switch (opcode) {
-    case J:
-    case JAL:
-    case BEQ:
-    case BNE:
-    case BLEZ:  // POP06 bgeuc/bleuc, blezalc, bgezalc
-    case BGTZ:  // POP07 bltuc/bgtuc, bgtzalc, bltzalc
-    case BEQL:
-    case BNEL:
-    case BLEZL:  // POP26 bgezc, blezc, bgec/blec
-    case BGTZL:  // POP27 bgtzc, bltzc, bltc/bgtc
-    case BC:
-    case BALC:
-    case POP10:  // beqzalc, bovc, beqc
-    case POP30:  // bnezalc, bnvc, bnec
-    case POP66:  // beqzc, jic
-    case POP76:  // bnezc, jialc
-      return true;
-    case REGIMM:
-      switch (instr & kRtFieldMask) {
-        case BLTZ:
-        case BGEZ:
-        case BLTZAL:
-        case BGEZAL:
-          return true;
-        default:
-          return false;
-      }
-      break;
-    case SPECIAL:
-      switch (instr & kFunctionFieldMask) {
-        case JR:
-        case JALR:
-          return true;
-        default:
-          return false;
-      }
-      break;
-    case COP1:
-      switch (instr & kRsFieldMask) {
-        case BC1:
-        case BC1EQZ:
-        case BC1NEZ:
-          return true;
-          break;
-        default:
-          return false;
-      }
-      break;
-    default:
-      return false;
-  }
-}
-
-
-bool Instruction::IsLinkingInstruction() const {
-  switch (OpcodeFieldRaw()) {
-    case JAL:
-      return true;
-    case POP76:
-      if (RsFieldRawNoAssert() == JIALC)
-        return true;  // JIALC
-      else
-        return false;  // BNEZC
-    case REGIMM:
-      switch (RtFieldRaw()) {
-        case BGEZAL:
-        case BLTZAL:
-          return true;
-      default:
-        return false;
-      }
-    case SPECIAL:
-      switch (FunctionFieldRaw()) {
-        case JALR:
-          return true;
-        default:
-          return false;
-      }
-    default:
-      return false;
-  }
-}
-
-
-bool Instruction::IsTrap() const {
-  if (OpcodeFieldRaw() != SPECIAL) {
-    return false;
-  } else {
-    switch (FunctionFieldRaw()) {
-      case BREAK:
-      case TGE:
-      case TGEU:
-      case TLT:
-      case TLTU:
-      case TEQ:
-      case TNE:
-        return true;
-      default:
-        return false;
-    }
-  }
-}
-
-
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS