Relax requirement from VFP3 to VFP2 where possible.

src/arm/lithium-codegen-arm.cc

 // 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 47 matching lines @@
   Safepoint::DeoptMode deopt_mode_;
 };
 
 
 #define __ masm()->
 
 bool LCodeGen::GenerateCode() {
   HPhase phase("Z_Code generation", chunk());
   ASSERT(is_unused());
   status_ = GENERATING;
-  CpuFeatures::Scope scope1(VFP3);
+  CpuFeatures::Scope scope1(VFP2);
   CpuFeatures::Scope scope2(ARMv7);
 
   CodeStub::GenerateFPStubs();
 
   // Open a frame scope to indicate that there is a frame on the stack.  The
   // NONE indicates that the scope shouldn't actually generate code to set up
   // the frame (that is done in GeneratePrologue).
   FrameScope frame_scope(masm_, StackFrame::NONE);
 
   return GeneratePrologue() &&
@@ skipping 2823 matching lines @@
   } else {
     key = ToRegister(instr->key());
   }
   int element_size_shift = ElementsKindToShiftSize(elements_kind);
   int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
       ? (element_size_shift - kSmiTagSize) : element_size_shift;
   int additional_offset = instr->additional_index() << element_size_shift;
 
   if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
       elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
-    CpuFeatures::Scope scope(VFP3);
+    CpuFeatures::Scope scope(VFP2);
     DwVfpRegister result = ToDoubleRegister(instr->result());
     Operand operand = key_is_constant
         ? Operand(constant_key << element_size_shift)
         : Operand(key, LSL, shift_size);
     __ add(scratch0(), external_pointer, operand);
     if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
       __ vldr(result.low(), scratch0(), additional_offset);
       __ vcvt_f64_f32(result, result.low());
     } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
       __ vldr(result, scratch0(), additional_offset);
@@ skipping 533 matching lines @@
 
 void LCodeGen::DoMathPowHalf(LUnaryMathOperation* instr) {
   DoubleRegister input = ToDoubleRegister(instr->InputAt(0));
   DoubleRegister result = ToDoubleRegister(instr->result());
   DoubleRegister temp = ToDoubleRegister(instr->TempAt(0));
 
   // Note that according to ECMA-262 15.8.2.13:
   // Math.pow(-Infinity, 0.5) == Infinity
   // Math.sqrt(-Infinity) == NaN
   Label done;
-  __ vmov(temp, -V8_INFINITY);
+  __ Vmov(temp, -V8_INFINITY);
   __ VFPCompareAndSetFlags(input, temp);
   __ vneg(result, temp, eq);
   __ b(&done, eq);
 
   // Add +0 to convert -0 to +0.
   __ vadd(result, input, kDoubleRegZero);
   __ vsqrt(result, result);
   __ bind(&done);
 }
 
@@ skipping 458 matching lines @@
   } else {
     key = ToRegister(instr->key());
   }
   int element_size_shift = ElementsKindToShiftSize(elements_kind);
   int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
       ? (element_size_shift - kSmiTagSize) : element_size_shift;
   int additional_offset = instr->additional_index() << element_size_shift;
 
   if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
       elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
-    CpuFeatures::Scope scope(VFP3);
+    CpuFeatures::Scope scope(VFP2);
     DwVfpRegister value(ToDoubleRegister(instr->value()));
     Operand operand(key_is_constant
                     ? Operand(constant_key << element_size_shift)
                     : Operand(key, LSL, shift_size));
     __ add(scratch0(), external_pointer, operand);
     if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
       __ vcvt_f32_f64(double_scratch0().low(), value);
       __ vstr(double_scratch0().low(), scratch0(), additional_offset);
     } else {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
       __ vstr(value, scratch0(), additional_offset);
@@ skipping 461 matching lines @@
     __ vldr(double_scratch2, scratch1, HeapNumber::kValueOffset);
 
     __ EmitECMATruncate(input_reg,
                         double_scratch2,
                         single_scratch,
                         scratch1,
                         scratch2,
                         scratch3);
 
   } else {
-    CpuFeatures::Scope scope(VFP3);
+    CpuFeatures::Scope scope(VFP2);
     // Deoptimize if we don't have a heap number.
     DeoptimizeIf(ne, instr->environment());
 
     __ sub(ip, input_reg, Operand(kHeapObjectTag));
     __ vldr(double_scratch, ip, HeapNumber::kValueOffset);
     __ EmitVFPTruncate(kRoundToZero,
                        single_scratch,
                        double_scratch,
                        scratch1,
                        scratch2,
@@ skipping 1009 matching lines @@
   __ sub(scratch, result, Operand(index, LSL, kPointerSizeLog2 - kSmiTagSize));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal