Relax requirement from VFP3 to VFP2 where possible.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index d94a1feb238c5e0abef2c1d2f670e30e2c72c6b9..3de8477a5e312c6f93e50a3addab4ae06502418e 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -65,7 +65,7 @@ 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();
@@ -2909,7 +2909,7 @@ void LCodeGen::DoLoadKeyedSpecializedArrayElement(
 
   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)
@@ -3463,7 +3463,7 @@ void LCodeGen::DoMathPowHalf(LUnaryMathOperation* instr) {
   // 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);
@@ -3942,7 +3942,7 @@ void LCodeGen::DoStoreKeyedSpecializedArrayElement(
 
   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)
@@ -4424,7 +4424,7 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
                         scratch3);
 
   } else {
-    CpuFeatures::Scope scope(VFP3);
+    CpuFeatures::Scope scope(VFP2);
     // Deoptimize if we don't have a heap number.
     DeoptimizeIf(ne, instr->environment());