Require CMOV support for the ia32 port.

src/ia32/assembler-ia32.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 463 matching lines @@
   class NextField: public BitField<int,  2, 32-2> {};
 
   void init(Label* L, Type type);
 };
 
 
 
 // CpuFeatures keeps track of which features are supported by the target CPU.
 // Supported features must be enabled by a CpuFeatureScope before use.
 // Example:
-//   if (assembler->IsSupported(CMOV)) {
-//     CpuFeatureScope fscope(assembler, CMOV);
-//     // Generate code containing cmov.
+//   if (assembler->IsSupported(SSE3)) {
+//     CpuFeatureScope fscope(assembler, SSE3);
+//     // Generate code containing SSE3 instructions.
 //   } else {
 //     // Generate alternative code.
 //   }
 class CpuFeatures : public AllStatic {
  public:
   // Detect features of the target CPU. Set safe defaults if the serializer
   // is enabled (snapshots must be portable).
   static void Probe(bool serializer_enabled);
 
   // Check whether a feature is supported by the target CPU.
   static bool IsSupported(CpuFeature f) {
     ASSERT(initialized_);
     if (Check(f, cross_compile_)) return true;
     if (f == SSE3 && !FLAG_enable_sse3) return false;
     if (f == SSE4_1 && !FLAG_enable_sse4_1) return false;
-    if (f == CMOV && !FLAG_enable_cmov) return false;
     return Check(f, supported_);
   }
 
   static bool IsSafeForSnapshot(Isolate* isolate, CpuFeature f) {
     return Check(f, cross_compile_) ||
            (IsSupported(f) &&
             !(Serializer::enabled(isolate) &&
               Check(f, found_by_runtime_probing_only_)));
   }
 
@@ skipping 735 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_ASSEMBLER_IA32_H_