Remove ARM support for soft float (pre-VFP2)

src/arm/code-stubs-arm.h

 // Copyright 2012 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 43 matching lines @@
 
   Major MajorKey() { return TranscendentalCache; }
   int MinorKey() { return type_ | argument_type_; }
   Runtime::FunctionId RuntimeFunction();
 };
 
 
 class StoreBufferOverflowStub: public PlatformCodeStub {
  public:
   explicit StoreBufferOverflowStub(SaveFPRegsMode save_fp)
-      : save_doubles_(save_fp) {
-    ASSERT(CpuFeatures::IsSafeForSnapshot(VFP2) || save_fp == kDontSaveFPRegs);
-  }
+      : save_doubles_(save_fp) {}
 
   void Generate(MacroAssembler* masm);
 
   virtual bool IsPregenerated() { return true; }
   static void GenerateFixedRegStubsAheadOfTime(Isolate* isolate);
   virtual bool SometimesSetsUpAFrame() { return false; }
 
  private:
   SaveFPRegsMode save_doubles_;
 
@@ skipping 389 matching lines @@
     }
 
     // If we have to call into C then we need to save and restore all caller-
     // saved registers that were not already preserved.  The scratch registers
     // will be restored by other means so we don't bother pushing them here.
     void SaveCallerSaveRegisters(MacroAssembler* masm, SaveFPRegsMode mode) {
       masm->stm(db_w, sp, (kCallerSaved | lr.bit()) & ~scratch1_.bit());
       if (mode == kSaveFPRegs) {
         // Number of d-regs not known at snapshot time.
         ASSERT(!Serializer::enabled());
-        CpuFeatureScope scope(masm, VFP2);
         masm->sub(sp,
                   sp,
                   Operand(kDoubleSize * (DwVfpRegister::NumRegisters() - 1)));
         // Save all VFP registers except d0.
         // TODO(hans): We should probably save d0 too. And maybe use vstm.
         for (int i = DwVfpRegister::NumRegisters() - 1; i > 0; i--) {
           DwVfpRegister reg = DwVfpRegister::from_code(i);
           masm->vstr(reg, MemOperand(sp, (i - 1) * kDoubleSize));
         }
       }
     }
 
     inline void RestoreCallerSaveRegisters(MacroAssembler*masm,
                                            SaveFPRegsMode mode) {
       if (mode == kSaveFPRegs) {
         // Number of d-regs not known at snapshot time.
         ASSERT(!Serializer::enabled());
-        CpuFeatureScope scope(masm, VFP2);
         // Restore all VFP registers except d0.
         // TODO(hans): We should probably restore d0 too. And maybe use vldm.
         for (int i = DwVfpRegister::NumRegisters() - 1; i > 0; i--) {
           DwVfpRegister reg = DwVfpRegister::from_code(i);
           masm->vldr(reg, MemOperand(sp, (i - 1) * kDoubleSize));
         }
         masm->add(sp,
                   sp,
                   Operand(kDoubleSize * (DwVfpRegister::NumRegisters() - 1)));
       }
@@ skipping 289 matching lines @@
 
   class LookupModeBits: public BitField<LookupMode, 0, 1> {};
 
   LookupMode mode_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODE_STUBS_ARM_H_