Remove ARM support for soft float (pre-VFP2)

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 177 matching lines @@
       __ str(r1, MemOperand(r0, 2 * kPointerSize));
       __ cmp(r0, sp);
       __ b(ne, &loop);
       __ pop(r1);
       __ pop(r0);
     } else {
       __ sub(sp,  sp, Operand(slots * kPointerSize));
     }
   }
 
-  if (info()->saves_caller_doubles() && CpuFeatures::IsSupported(VFP2)) {
-    CpuFeatureScope scope(masm(), VFP2);
+  if (info()->saves_caller_doubles()) {
     Comment(";;; Save clobbered callee double registers");
     int count = 0;
     BitVector* doubles = chunk()->allocated_double_registers();
     BitVector::Iterator save_iterator(doubles);
     while (!save_iterator.Done()) {
       __ vstr(DwVfpRegister::FromAllocationIndex(save_iterator.Current()),
               MemOperand(sp, count * kDoubleSize));
       save_iterator.Advance();
       count++;
     }
@@ skipping 992 matching lines @@
 
     ASSERT(!dividend.is(divisor));
     ASSERT(!dividend.is(quotient));
     ASSERT(!divisor.is(quotient));
     ASSERT(!scratch.is(left));
     ASSERT(!scratch.is(right));
     ASSERT(!scratch.is(result));
 
     Label vfp_modulo, both_positive, right_negative;
 
-    CpuFeatureScope scope(masm(), VFP2);
-
     // Check for x % 0.
     if (instr->hydrogen()->CheckFlag(HValue::kCanBeDivByZero)) {
       __ cmp(right, Operand::Zero());
       DeoptimizeIf(eq, instr->environment());
     }
 
     __ Move(result, left);
 
     // (0 % x) must yield 0 (if x is finite, which is the case here).
     __ cmp(left, Operand::Zero());
@@ skipping 384 matching lines @@
 
     __ bind(&done);
   }
 }
 
 
 void LCodeGen::DoDeferredBinaryOpStub(LPointerMap* pointer_map,
                                       LOperand* left_argument,
                                       LOperand* right_argument,
                                       Token::Value op) {
-  CpuFeatureScope vfp_scope(masm(), VFP2);
   Register left = ToRegister(left_argument);
   Register right = ToRegister(right_argument);
 
   PushSafepointRegistersScope scope(this, Safepoint::kWithRegistersAndDoubles);
   // Move left to r1 and right to r0 for the stub call.
   if (left.is(r1)) {
     __ Move(r0, right);
   } else if (left.is(r0) && right.is(r1)) {
     __ Swap(r0, r1, r2);
   } else if (left.is(r0)) {
@@ skipping 265 matching lines @@
 
 void LCodeGen::DoConstantI(LConstantI* instr) {
   ASSERT(instr->result()->IsRegister());
   __ mov(ToRegister(instr->result()), Operand(instr->value()));
 }
 
 
 void LCodeGen::DoConstantD(LConstantD* instr) {
   ASSERT(instr->result()->IsDoubleRegister());
   DwVfpRegister result = ToDoubleRegister(instr->result());
-  CpuFeatureScope scope(masm(), VFP2);
   double v = instr->value();
   __ Vmov(result, v, scratch0());
 }
 
 
 void LCodeGen::DoConstantT(LConstantT* instr) {
   Handle<Object> value = instr->value();
   if (value->IsSmi()) {
     __ mov(ToRegister(instr->result()), Operand(value));
   } else {
@@ skipping 150 matching lines @@
         ? ToOperand(right)
         : Operand(EmitLoadRegister(right, ip));
     Register result_reg = ToRegister(instr->result());
     __ cmp(left_reg, right_op);
     if (!result_reg.is(left_reg)) {
       __ mov(result_reg, left_reg, LeaveCC, condition);
     }
     __ mov(result_reg, right_op, LeaveCC, NegateCondition(condition));
   } else {
     ASSERT(instr->hydrogen()->representation().IsDouble());
-    CpuFeatureScope scope(masm(), VFP2);
     DwVfpRegister left_reg = ToDoubleRegister(left);
     DwVfpRegister right_reg = ToDoubleRegister(right);
     DwVfpRegister result_reg = ToDoubleRegister(instr->result());
     Label check_nan_left, check_zero, return_left, return_right, done;
     __ VFPCompareAndSetFlags(left_reg, right_reg);
     __ b(vs, &check_nan_left);
     __ b(eq, &check_zero);
     __ b(condition, &return_left);
     __ b(al, &return_right);
 
@@ skipping 25 matching lines @@
     __ bind(&return_left);
     if (!left_reg.is(result_reg)) {
       __ vmov(result_reg, left_reg);
     }
     __ bind(&done);
   }
 }
 
 
 void LCodeGen::DoArithmeticD(LArithmeticD* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   DwVfpRegister left = ToDoubleRegister(instr->left());
   DwVfpRegister right = ToDoubleRegister(instr->right());
   DwVfpRegister result = ToDoubleRegister(instr->result());
   switch (instr->op()) {
     case Token::ADD:
       __ vadd(result, left, right);
       break;
     case Token::SUB:
       __ vsub(result, left, right);
       break;
@@ skipping 70 matching lines @@
 void LCodeGen::DoBranch(LBranch* instr) {
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsInteger32()) {
     Register reg = ToRegister(instr->value());
     __ cmp(reg, Operand::Zero());
     EmitBranch(true_block, false_block, ne);
   } else if (r.IsDouble()) {
-    CpuFeatureScope scope(masm(), VFP2);
     DwVfpRegister reg = ToDoubleRegister(instr->value());
     Register scratch = scratch0();
 
     // Test the double value. Zero and NaN are false.
     __ VFPCompareAndLoadFlags(reg, 0.0, scratch);
     __ tst(scratch, Operand(kVFPZConditionFlagBit | kVFPVConditionFlagBit));
     EmitBranch(true_block, false_block, eq);
   } else {
     ASSERT(r.IsTagged());
     Register reg = ToRegister(instr->value());
@@ skipping 71 matching lines @@
         __ bind(&not_string);
       }
 
       if (expected.Contains(ToBooleanStub::SYMBOL)) {
         // Symbol value -> true.
         __ CompareInstanceType(map, ip, SYMBOL_TYPE);
         __ b(eq, true_label);
       }
 
       if (expected.Contains(ToBooleanStub::HEAP_NUMBER)) {
-        CpuFeatureScope scope(masm(), VFP2);
         // heap number -> false iff +0, -0, or NaN.
         DwVfpRegister dbl_scratch = double_scratch0();
         Label not_heap_number;
         __ CompareRoot(map, Heap::kHeapNumberMapRootIndex);
         __ b(ne, &not_heap_number);
         __ vldr(dbl_scratch, FieldMemOperand(reg, HeapNumber::kValueOffset));
         __ VFPCompareAndSetFlags(dbl_scratch, 0.0);
         __ b(vs, false_label);  // NaN -> false.
         __ b(eq, false_label);  // +0, -0 -> false.
         __ b(true_label);
@@ skipping 59 matching lines @@
   if (left->IsConstantOperand() && right->IsConstantOperand()) {
     // We can statically evaluate the comparison.
     double left_val = ToDouble(LConstantOperand::cast(left));
     double right_val = ToDouble(LConstantOperand::cast(right));
     int next_block =
       EvalComparison(instr->op(), left_val, right_val) ? true_block
                                                        : false_block;
     EmitGoto(next_block);
   } else {
     if (instr->is_double()) {
-      CpuFeatureScope scope(masm(), VFP2);
       // Compare left and right operands as doubles and load the
       // resulting flags into the normal status register.
       __ VFPCompareAndSetFlags(ToDoubleRegister(left), ToDoubleRegister(right));
       // If a NaN is involved, i.e. the result is unordered (V set),
       // jump to false block label.
       __ b(vs, chunk_->GetAssemblyLabel(false_block));
     } else {
       if (right->IsConstantOperand()) {
         __ cmp(ToRegister(left),
                Operand(ToInteger32(LConstantOperand::cast(right))));
@@ skipping 534 matching lines @@
 }
 
 
 void LCodeGen::DoReturn(LReturn* instr) {
   if (FLAG_trace && info()->IsOptimizing()) {
     // Push the return value on the stack as the parameter.
     // Runtime::TraceExit returns its parameter in r0.
     __ push(r0);
     __ CallRuntime(Runtime::kTraceExit, 1);
   }
-  if (info()->saves_caller_doubles() && CpuFeatures::IsSupported(VFP2)) {
-    CpuFeatureScope scope(masm(), VFP2);
+  if (info()->saves_caller_doubles()) {
     ASSERT(NeedsEagerFrame());
     BitVector* doubles = chunk()->allocated_double_registers();
     BitVector::Iterator save_iterator(doubles);
     int count = 0;
     while (!save_iterator.Done()) {
       __ vldr(DwVfpRegister::FromAllocationIndex(save_iterator.Current()),
                MemOperand(sp, count * kDoubleSize));
       save_iterator.Advance();
       count++;
     }
@@ skipping 361 matching lines @@
       ? (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) {
     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 (CpuFeatures::IsSupported(VFP2)) {
-      CpuFeatureScope scope(masm(), VFP2);
-      if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
-        __ vldr(kScratchDoubleReg.low(), scratch0(), additional_offset);
-        __ vcvt_f64_f32(result, kScratchDoubleReg.low());
-      } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
-        __ vldr(result, scratch0(), additional_offset);
-      }
-    } else {
-      if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
-        Register value = external_pointer;
-        __ ldr(value, MemOperand(scratch0(), additional_offset));
-        __ and_(sfpd_lo, value, Operand(kBinary32MantissaMask));
-
-        __ mov(scratch0(), Operand(value, LSR, kBinary32MantissaBits));
-        __ and_(scratch0(), scratch0(),
-                Operand(kBinary32ExponentMask >> kBinary32MantissaBits));
-
-        Label exponent_rebiased;
-        __ teq(scratch0(), Operand(0x00));
-        __ b(eq, &exponent_rebiased);
-
-        __ teq(scratch0(), Operand(0xff));
-        __ mov(scratch0(), Operand(0x7ff), LeaveCC, eq);
-        __ b(eq, &exponent_rebiased);
-
-        // Rebias exponent.
-        __ add(scratch0(),
-               scratch0(),
-               Operand(-kBinary32ExponentBias + HeapNumber::kExponentBias));
-
-        __ bind(&exponent_rebiased);
-        __ and_(sfpd_hi, value, Operand(kBinary32SignMask));
-        __ orr(sfpd_hi, sfpd_hi,
-               Operand(scratch0(), LSL, HeapNumber::kMantissaBitsInTopWord));
-
-        // Shift mantissa.
-        static const int kMantissaShiftForHiWord =
-            kBinary32MantissaBits - HeapNumber::kMantissaBitsInTopWord;
-
-        static const int kMantissaShiftForLoWord =
-            kBitsPerInt - kMantissaShiftForHiWord;
-
-        __ orr(sfpd_hi, sfpd_hi,
-               Operand(sfpd_lo, LSR, kMantissaShiftForHiWord));
-        __ mov(sfpd_lo, Operand(sfpd_lo, LSL, kMantissaShiftForLoWord));
-
-      } else {
-        __ ldr(sfpd_lo, MemOperand(scratch0(), additional_offset));
-        __ ldr(sfpd_hi, MemOperand(scratch0(),
-                                   additional_offset + kPointerSize));
-      }
+    if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
+      __ vldr(kScratchDoubleReg.low(), scratch0(), additional_offset);
+      __ vcvt_f64_f32(result, kScratchDoubleReg.low());
+    } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
+      __ vldr(result, scratch0(), additional_offset);
     }
   } else {
     Register result = ToRegister(instr->result());
     MemOperand mem_operand = PrepareKeyedOperand(
         key, external_pointer, key_is_constant, constant_key,
         element_size_shift, shift_size,
         instr->additional_index(), additional_offset);
     switch (elements_kind) {
       case EXTERNAL_BYTE_ELEMENTS:
         __ ldrsb(result, mem_operand);
@@ skipping 53 matching lines @@
     }
   } else {
     key = ToRegister(instr->key());
   }
 
   int base_offset = (FixedDoubleArray::kHeaderSize - kHeapObjectTag) +
       ((constant_key + instr->additional_index()) << element_size_shift);
   if (!key_is_constant) {
     __ add(elements, elements, Operand(key, LSL, shift_size));
   }
-  if (CpuFeatures::IsSupported(VFP2)) {
-    CpuFeatureScope scope(masm(), VFP2);
-    __ add(elements, elements, Operand(base_offset));
-    __ vldr(result, elements, 0);
-    if (instr->hydrogen()->RequiresHoleCheck()) {
-      __ ldr(scratch, MemOperand(elements, sizeof(kHoleNanLower32)));
-      __ cmp(scratch, Operand(kHoleNanUpper32));
-      DeoptimizeIf(eq, instr->environment());
-    }
-  } else {
-      __ ldr(sfpd_hi, MemOperand(elements, base_offset + kPointerSize));
-      __ ldr(sfpd_lo, MemOperand(elements, base_offset));
-    if (instr->hydrogen()->RequiresHoleCheck()) {
-      ASSERT(kPointerSize == sizeof(kHoleNanLower32));
-      __ cmp(sfpd_hi, Operand(kHoleNanUpper32));
-      DeoptimizeIf(eq, instr->environment());
-    }
+  __ add(elements, elements, Operand(base_offset));
+  __ vldr(result, elements, 0);
+  if (instr->hydrogen()->RequiresHoleCheck()) {
+    __ ldr(scratch, MemOperand(elements, sizeof(kHoleNanLower32)));
+    __ cmp(scratch, Operand(kHoleNanUpper32));
+    DeoptimizeIf(eq, instr->environment());
   }
 }
 
 
 void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
   Register elements = ToRegister(instr->elements());
   Register result = ToRegister(instr->result());
   Register scratch = scratch0();
   Register store_base = scratch;
   int offset = 0;
@@ skipping 421 matching lines @@
   // We can make rsb conditional because the previous cmp instruction
   // will clear the V (overflow) flag and rsb won't set this flag
   // if input is positive.
   __ rsb(result, input, Operand::Zero(), SetCC, mi);
   // Deoptimize on overflow.
   DeoptimizeIf(vs, instr->environment());
 }
 
 
 void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   // Class for deferred case.
   class DeferredMathAbsTaggedHeapNumber: public LDeferredCode {
    public:
     DeferredMathAbsTaggedHeapNumber(LCodeGen* codegen,
                                     LUnaryMathOperation* instr)
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
       codegen()->DoDeferredMathAbsTaggedHeapNumber(instr_);
     }
     virtual LInstruction* instr() { return instr_; }
@@ skipping 16 matching lines @@
     // Smi check.
     __ JumpIfNotSmi(input, deferred->entry());
     // If smi, handle it directly.
     EmitIntegerMathAbs(instr);
     __ bind(deferred->exit());
   }
 }
 
 
 void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   DwVfpRegister input = ToDoubleRegister(instr->value());
   Register result = ToRegister(instr->result());
   Register input_high = scratch0();
   Label done, exact;
 
   __ vmov(input_high, input.high());
   __ TryInt32Floor(result, input, input_high, double_scratch0(), &done, &exact);
   DeoptimizeIf(al, instr->environment());
 
   __ bind(&exact);
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
     // Test for -0.
     __ cmp(result, Operand::Zero());
     __ b(ne, &done);
     __ cmp(input_high, Operand::Zero());
     DeoptimizeIf(mi, instr->environment());
   }
   __ bind(&done);
 }
 
 
 void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   DwVfpRegister input = ToDoubleRegister(instr->value());
   Register result = ToRegister(instr->result());
   DwVfpRegister double_scratch1 = ToDoubleRegister(instr->temp());
   DwVfpRegister input_plus_dot_five = double_scratch1;
   Register input_high = scratch0();
   DwVfpRegister dot_five = double_scratch0();
   Label convert, done;
 
   __ Vmov(dot_five, 0.5, scratch0());
   __ vabs(double_scratch1, input);
@@ skipping 19 matching lines @@
   __ vmov(input_high, input_plus_dot_five.high());
   // Reuse dot_five (double_scratch0) as we no longer need this value.
   __ TryInt32Floor(result, input_plus_dot_five, input_high, double_scratch0(),
                    &done, &done);
   DeoptimizeIf(al, instr->environment());
   __ bind(&done);
 }
 
 
 void LCodeGen::DoMathSqrt(LUnaryMathOperation* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   DwVfpRegister input = ToDoubleRegister(instr->value());
   DwVfpRegister result = ToDoubleRegister(instr->result());
   __ vsqrt(result, input);
 }
 
 
 void LCodeGen::DoMathPowHalf(LUnaryMathOperation* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   DwVfpRegister input = ToDoubleRegister(instr->value());
   DwVfpRegister result = ToDoubleRegister(instr->result());
   DwVfpRegister temp = ToDoubleRegister(instr->temp());
 
   // 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, scratch0());
   __ 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);
 }
 
 
 void LCodeGen::DoPower(LPower* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   Representation exponent_type = instr->hydrogen()->right()->representation();
   // Having marked this as a call, we can use any registers.
   // Just make sure that the input/output registers are the expected ones.
   ASSERT(!instr->right()->IsDoubleRegister() ||
          ToDoubleRegister(instr->right()).is(d2));
   ASSERT(!instr->right()->IsRegister() ||
          ToRegister(instr->right()).is(r2));
   ASSERT(ToDoubleRegister(instr->left()).is(d1));
   ASSERT(ToDoubleRegister(instr->result()).is(d3));
 
@@ skipping 12 matching lines @@
     __ CallStub(&stub);
   } else {
     ASSERT(exponent_type.IsDouble());
     MathPowStub stub(MathPowStub::DOUBLE);
     __ CallStub(&stub);
   }
 }
 
 
 void LCodeGen::DoRandom(LRandom* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   class DeferredDoRandom: public LDeferredCode {
    public:
     DeferredDoRandom(LCodeGen* codegen, LRandom* instr)
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() { codegen()->DoDeferredRandom(instr_); }
     virtual LInstruction* instr() { return instr_; }
    private:
     LRandom* instr_;
   };
 
@@ skipping 58 matching lines @@
 
 
 void LCodeGen::DoDeferredRandom(LRandom* instr) {
   __ PrepareCallCFunction(1, scratch0());
   __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1);
   // Return value is in r0.
 }
 
 
 void LCodeGen::DoMathExp(LMathExp* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   DwVfpRegister input = ToDoubleRegister(instr->value());
   DwVfpRegister result = ToDoubleRegister(instr->result());
   DwVfpRegister double_scratch1 = ToDoubleRegister(instr->double_temp());
   DwVfpRegister double_scratch2 = double_scratch0();
   Register temp1 = ToRegister(instr->temp1());
   Register temp2 = ToRegister(instr->temp2());
 
   MathExpGenerator::EmitMathExp(
       masm(), input, result, double_scratch1, double_scratch2,
       temp1, temp2, scratch0());
@@ skipping 277 matching lines @@
     }
     __ cmp(ip, ToRegister(instr->length()));
   } else {
     __ cmp(ToRegister(instr->index()), ToRegister(instr->length()));
   }
   DeoptimizeIf(hs, instr->environment());
 }
 
 
 void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   Register external_pointer = ToRegister(instr->elements());
   Register key = no_reg;
   ElementsKind elements_kind = instr->elements_kind();
   bool key_is_constant = instr->key()->IsConstantOperand();
   int constant_key = 0;
   if (key_is_constant) {
     constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
     if (constant_key & 0xF0000000) {
       Abort("array index constant value too big.");
     }
@@ skipping 50 matching lines @@
       case DICTIONARY_ELEMENTS:
       case NON_STRICT_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
         break;
     }
   }
 }
 
 
 void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   DwVfpRegister value = ToDoubleRegister(instr->value());
   Register elements = ToRegister(instr->elements());
   Register key = no_reg;
   Register scratch = scratch0();
   bool key_is_constant = instr->key()->IsConstantOperand();
   int constant_key = 0;
 
   // Calculate the effective address of the slot in the array to store the
   // double value.
   if (key_is_constant) {
@@ skipping 280 matching lines @@
 
 
 void LCodeGen::DoStringLength(LStringLength* instr) {
   Register string = ToRegister(instr->string());
   Register result = ToRegister(instr->result());
   __ ldr(result, FieldMemOperand(string, String::kLengthOffset));
 }
 
 
 void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   LOperand* input = instr->value();
   ASSERT(input->IsRegister() || input->IsStackSlot());
   LOperand* output = instr->result();
   ASSERT(output->IsDoubleRegister());
   SwVfpRegister single_scratch = double_scratch0().low();
   if (input->IsStackSlot()) {
     Register scratch = scratch0();
     __ ldr(scratch, ToMemOperand(input));
     __ vmov(single_scratch, scratch);
   } else {
     __ vmov(single_scratch, ToRegister(input));
   }
   __ vcvt_f64_s32(ToDoubleRegister(output), single_scratch);
 }
 
 
 void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   LOperand* input = instr->value();
   LOperand* output = instr->result();
 
   SwVfpRegister flt_scratch = double_scratch0().low();
   __ vmov(flt_scratch, ToRegister(input));
   __ vcvt_f64_u32(ToDoubleRegister(output), flt_scratch);
 }
 
 
 void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
@@ skipping 41 matching lines @@
   Register reg = ToRegister(input);
 
   DeferredNumberTagU* deferred = new(zone()) DeferredNumberTagU(this, instr);
   __ cmp(reg, Operand(Smi::kMaxValue));
   __ b(hi, deferred->entry());
   __ SmiTag(reg, reg);
   __ bind(deferred->exit());
 }
 
 
-// Convert unsigned integer with specified number of leading zeroes in binary
-// representation to IEEE 754 double.
-// Integer to convert is passed in register src.
-// Resulting double is returned in registers hiword:loword.
-// This functions does not work correctly for 0.
-static void GenerateUInt2Double(MacroAssembler* masm,
-                                Register src,
-                                Register hiword,
-                                Register loword,
-                                Register scratch,
-                                int leading_zeroes) {
-  const int meaningful_bits = kBitsPerInt - leading_zeroes - 1;
-  const int biased_exponent = HeapNumber::kExponentBias + meaningful_bits;
-
-  const int mantissa_shift_for_hi_word =
-      meaningful_bits - HeapNumber::kMantissaBitsInTopWord;
-  const int mantissa_shift_for_lo_word =
-      kBitsPerInt - mantissa_shift_for_hi_word;
-  masm->mov(scratch, Operand(biased_exponent << HeapNumber::kExponentShift));
-  if (mantissa_shift_for_hi_word > 0) {
-    masm->mov(loword, Operand(src, LSL, mantissa_shift_for_lo_word));
-    masm->orr(hiword, scratch,
-              Operand(src, LSR, mantissa_shift_for_hi_word));
-  } else {
-    masm->mov(loword, Operand::Zero());
-    masm->orr(hiword, scratch,
-              Operand(src, LSL, -mantissa_shift_for_hi_word));
-  }
-
-  // If least significant bit of biased exponent was not 1 it was corrupted
-  // by most significant bit of mantissa so we should fix that.
-  if (!(biased_exponent & 1)) {
-    masm->bic(hiword, hiword, Operand(1 << HeapNumber::kExponentShift));
-  }
-}
-
-
 void LCodeGen::DoDeferredNumberTagI(LInstruction* instr,
                                     LOperand* value,
                                     IntegerSignedness signedness) {
   Label slow;
   Register src = ToRegister(value);
   Register dst = ToRegister(instr->result());
   DwVfpRegister dbl_scratch = double_scratch0();
   SwVfpRegister flt_scratch = dbl_scratch.low();
 
   // Preserve the value of all registers.
   PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
 
   Label done;
   if (signedness == SIGNED_INT32) {
     // There was overflow, so bits 30 and 31 of the original integer
     // disagree. Try to allocate a heap number in new space and store
     // the value in there. If that fails, call the runtime system.
     if (dst.is(src)) {
       __ SmiUntag(src, dst);
       __ eor(src, src, Operand(0x80000000));
     }
-    if (CpuFeatures::IsSupported(VFP2)) {
-      CpuFeatureScope scope(masm(), VFP2);
-      __ vmov(flt_scratch, src);
-      __ vcvt_f64_s32(dbl_scratch, flt_scratch);
-    } else {
-      FloatingPointHelper::Destination dest =
-          FloatingPointHelper::kCoreRegisters;
-      FloatingPointHelper::ConvertIntToDouble(masm(), src, dest, d0,
-                                              sfpd_lo, sfpd_hi,
-                                              scratch0(), s0);
-    }
+    __ vmov(flt_scratch, src);
+    __ vcvt_f64_s32(dbl_scratch, flt_scratch);
   } else {
-    if (CpuFeatures::IsSupported(VFP2)) {
-      CpuFeatureScope scope(masm(), VFP2);
-      __ vmov(flt_scratch, src);
-      __ vcvt_f64_u32(dbl_scratch, flt_scratch);
-    } else {
-      Label no_leading_zero, convert_done;
-      __ tst(src, Operand(0x80000000));
-      __ b(ne, &no_leading_zero);
-
-      // Integer has one leading zeros.
-      GenerateUInt2Double(masm(), src, sfpd_hi, sfpd_lo, r9, 1);
-      __ b(&convert_done);
-
-      __ bind(&no_leading_zero);
-      GenerateUInt2Double(masm(), src, sfpd_hi, sfpd_lo, r9, 0);
-      __ bind(&convert_done);
-    }
+    __ vmov(flt_scratch, src);
+    __ vcvt_f64_u32(dbl_scratch, flt_scratch);
   }
 
   if (FLAG_inline_new) {
     __ LoadRoot(scratch0(), Heap::kHeapNumberMapRootIndex);
     __ AllocateHeapNumber(r5, r3, r4, scratch0(), &slow, DONT_TAG_RESULT);
     __ Move(dst, r5);
     __ b(&done);
   }
 
   // Slow case: Call the runtime system to do the number allocation.
   __ bind(&slow);
 
   // TODO(3095996): Put a valid pointer value in the stack slot where the result
   // register is stored, as this register is in the pointer map, but contains an
   // integer value.
-  if (!CpuFeatures::IsSupported(VFP2)) {
-    // Preserve sfpd_lo.
-    __ mov(r9, sfpd_lo);
-  }
   __ mov(ip, Operand::Zero());
   __ StoreToSafepointRegisterSlot(ip, dst);
   CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
   __ Move(dst, r0);
-  if (!CpuFeatures::IsSupported(VFP2)) {
-    // Restore sfpd_lo.
-    __ mov(sfpd_lo, r9);
-  }
   __ sub(dst, dst, Operand(kHeapObjectTag));
 
   // Done. Put the value in dbl_scratch into the value of the allocated heap
   // number.
   __ bind(&done);
-  if (CpuFeatures::IsSupported(VFP2)) {
-    CpuFeatureScope scope(masm(), VFP2);
-    __ vstr(dbl_scratch, dst, HeapNumber::kValueOffset);
-  } else {
-    __ str(sfpd_lo, MemOperand(dst, HeapNumber::kMantissaOffset));
-    __ str(sfpd_hi, MemOperand(dst, HeapNumber::kExponentOffset));
-  }
+  __ vstr(dbl_scratch, dst, HeapNumber::kValueOffset);
   __ add(dst, dst, Operand(kHeapObjectTag));
   __ StoreToSafepointRegisterSlot(dst, dst);
 }
 
 
 void LCodeGen::DoNumberTagD(LNumberTagD* instr) {
   class DeferredNumberTagD: public LDeferredCode {
    public:
     DeferredNumberTagD(LCodeGen* codegen, LNumberTagD* instr)
         : LDeferredCode(codegen), instr_(instr) { }
@@ skipping 12 matching lines @@
   bool convert_hole = false;
   HValue* change_input = instr->hydrogen()->value();
   if (change_input->IsLoadKeyed()) {
     HLoadKeyed* load = HLoadKeyed::cast(change_input);
     convert_hole = load->UsesMustHandleHole();
   }
 
   Label no_special_nan_handling;
   Label done;
   if (convert_hole) {
-    if (CpuFeatures::IsSupported(VFP2)) {
-      CpuFeatureScope scope(masm(), VFP2);
-      DwVfpRegister input_reg = ToDoubleRegister(instr->value());
-      __ VFPCompareAndSetFlags(input_reg, input_reg);
-      __ b(vc, &no_special_nan_handling);
-      __ vmov(reg, scratch0(), input_reg);
-      __ cmp(scratch0(), Operand(kHoleNanUpper32));
-      Label canonicalize;
-      __ b(ne, &canonicalize);
-      __ Move(reg, factory()->the_hole_value());
-      __ b(&done);
-      __ bind(&canonicalize);
-      __ Vmov(input_reg,
-              FixedDoubleArray::canonical_not_the_hole_nan_as_double(),
-              no_reg);
-    } else {
-      Label not_hole;
-      __ cmp(sfpd_hi, Operand(kHoleNanUpper32));
-      __ b(ne, &not_hole);
-      __ Move(reg, factory()->the_hole_value());
-      __ b(&done);
-      __ bind(&not_hole);
-      __ and_(scratch, sfpd_hi, Operand(0x7ff00000));
-      __ cmp(scratch, Operand(0x7ff00000));
-      __ b(ne, &no_special_nan_handling);
-      Label special_nan_handling;
-      __ tst(sfpd_hi, Operand(0x000FFFFF));
-      __ b(ne, &special_nan_handling);
-      __ cmp(sfpd_lo, Operand(0));
-      __ b(eq, &no_special_nan_handling);
-      __ bind(&special_nan_handling);
-      double canonical_nan =
-          FixedDoubleArray::canonical_not_the_hole_nan_as_double();
-      uint64_t casted_nan = BitCast<uint64_t>(canonical_nan);
-      __ mov(sfpd_lo,
-             Operand(static_cast<uint32_t>(casted_nan & 0xFFFFFFFF)));
-      __ mov(sfpd_hi,
-             Operand(static_cast<uint32_t>(casted_nan >> 32)));
-    }
+    DwVfpRegister input_reg = ToDoubleRegister(instr->value());
+    __ VFPCompareAndSetFlags(input_reg, input_reg);
+    __ b(vc, &no_special_nan_handling);
+    __ vmov(reg, scratch0(), input_reg);
+    __ cmp(scratch0(), Operand(kHoleNanUpper32));
+    Label canonicalize;
+    __ b(ne, &canonicalize);
+    __ Move(reg, factory()->the_hole_value());
+    __ b(&done);
+    __ bind(&canonicalize);
+    __ Vmov(input_reg,
+            FixedDoubleArray::canonical_not_the_hole_nan_as_double(),
+            no_reg);
   }
 
   __ bind(&no_special_nan_handling);
   DeferredNumberTagD* deferred = new(zone()) DeferredNumberTagD(this, instr);
   if (FLAG_inline_new) {
     __ LoadRoot(scratch, Heap::kHeapNumberMapRootIndex);
     // We want the untagged address first for performance
     __ AllocateHeapNumber(reg, temp1, temp2, scratch, deferred->entry(),
                           DONT_TAG_RESULT);
   } else {
     __ jmp(deferred->entry());
   }
   __ bind(deferred->exit());
-  if (CpuFeatures::IsSupported(VFP2)) {
-    CpuFeatureScope scope(masm(), VFP2);
-    __ vstr(input_reg, reg, HeapNumber::kValueOffset);
-  } else {
-    __ str(sfpd_lo, MemOperand(reg, HeapNumber::kValueOffset));
-    __ str(sfpd_hi, MemOperand(reg, HeapNumber::kValueOffset + kPointerSize));
-  }
+  __ vstr(input_reg, reg, HeapNumber::kValueOffset);
   // Now that we have finished with the object's real address tag it
   __ add(reg, reg, Operand(kHeapObjectTag));
   __ bind(&done);
 }
 
 
 void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
   // TODO(3095996): Get rid of this. For now, we need to make the
   // result register contain a valid pointer because it is already
   // contained in the register pointer map.
@@ skipping 29 matching lines @@
 
 void LCodeGen::EmitNumberUntagD(Register input_reg,
                                 DwVfpRegister result_reg,
                                 bool deoptimize_on_undefined,
                                 bool deoptimize_on_minus_zero,
                                 LEnvironment* env,
                                 NumberUntagDMode mode) {
   Register scratch = scratch0();
   SwVfpRegister flt_scratch = double_scratch0().low();
   ASSERT(!result_reg.is(double_scratch0()));
-  CpuFeatureScope scope(masm(), VFP2);
 
   Label load_smi, heap_number, done;
 
   if (mode == NUMBER_CANDIDATE_IS_ANY_TAGGED) {
     // Smi check.
     __ UntagAndJumpIfSmi(scratch, input_reg, &load_smi);
 
     // Heap number map check.
     __ ldr(scratch, FieldMemOperand(input_reg, HeapObject::kMapOffset));
     __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex);
@@ skipping 68 matching lines @@
   // SmiUntag(heap_object, SetCC)
   STATIC_ASSERT(kHeapObjectTag == 1);
   __ adc(input_reg, input_reg, Operand(input_reg));
 
   // Heap number map check.
   __ ldr(scratch1, FieldMemOperand(input_reg, HeapObject::kMapOffset));
   __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex);
   __ cmp(scratch1, Operand(ip));
 
   if (instr->truncating()) {
-    CpuFeatureScope scope(masm(), VFP2);
     Register scratch3 = ToRegister(instr->temp2());
     ASSERT(!scratch3.is(input_reg) &&
            !scratch3.is(scratch1) &&
            !scratch3.is(scratch2));
     // Performs a truncating conversion of a floating point number as used by
     // the JS bitwise operations.
     Label heap_number;
     __ b(eq, &heap_number);
     // Check for undefined. Undefined is converted to zero for truncating
     // conversions.
     __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
     __ cmp(input_reg, Operand(ip));
     DeoptimizeIf(ne, instr->environment());
     __ mov(input_reg, Operand::Zero());
     __ b(&done);
 
     __ bind(&heap_number);
     __ sub(scratch1, input_reg, Operand(kHeapObjectTag));
     __ vldr(double_scratch2, scratch1, HeapNumber::kValueOffset);
 
-    __ ECMAToInt32VFP(input_reg, double_scratch2, double_scratch,
-                      scratch1, scratch2, scratch3);
+    __ ECMAToInt32(input_reg, double_scratch2, double_scratch,
+                   scratch1, scratch2, scratch3);
 
   } else {
     CpuFeatureScope scope(masm(), VFP3);
     // 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);
     __ TryDoubleToInt32Exact(input_reg, double_scratch, double_scratch2);
     DeoptimizeIf(ne, instr->environment());
@@ skipping 77 matching lines @@
   Register result_reg = ToRegister(instr->result());
   Register scratch1 = scratch0();
   Register scratch2 = ToRegister(instr->temp());
   DwVfpRegister double_input = ToDoubleRegister(instr->value());
   DwVfpRegister double_scratch = double_scratch0();
 
   Label done;
 
   if (instr->truncating()) {
     Register scratch3 = ToRegister(instr->temp2());
-    __ ECMAToInt32VFP(result_reg, double_input, double_scratch,
-                      scratch1, scratch2, scratch3);
+    __ ECMAToInt32(result_reg, double_input, double_scratch,
+                   scratch1, scratch2, scratch3);
   } else {
     __ TryDoubleToInt32Exact(result_reg, double_input, double_scratch);
     // Deoptimize if the input wasn't a int32 (inside a double).
     DeoptimizeIf(ne, instr->environment());
   }
     __ bind(&done);
 }
 
 
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
@@ skipping 95 matching lines @@
     __ CompareMap(map_reg, map, &success, REQUIRE_EXACT_MAP);
     __ b(eq, &success);
   }
   Handle<Map> map = map_set->last();
   DoCheckMapCommon(map_reg, map, REQUIRE_EXACT_MAP, instr->environment());
   __ bind(&success);
 }
 
 
 void LCodeGen::DoClampDToUint8(LClampDToUint8* instr) {
-  CpuFeatureScope vfp_scope(masm(), VFP2);
   DwVfpRegister value_reg = ToDoubleRegister(instr->unclamped());
   Register result_reg = ToRegister(instr->result());
   DwVfpRegister temp_reg = ToDoubleRegister(instr->temp());
   __ ClampDoubleToUint8(result_reg, value_reg, temp_reg);
 }
 
 
 void LCodeGen::DoClampIToUint8(LClampIToUint8* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   Register unclamped_reg = ToRegister(instr->unclamped());
   Register result_reg = ToRegister(instr->result());
   __ ClampUint8(result_reg, unclamped_reg);
 }
 
 
 void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
-  CpuFeatureScope scope(masm(), VFP2);
   Register scratch = scratch0();
   Register input_reg = ToRegister(instr->unclamped());
   Register result_reg = ToRegister(instr->result());
   DwVfpRegister temp_reg = ToDoubleRegister(instr->temp());
   Label is_smi, done, heap_number;
 
   // Both smi and heap number cases are handled.
   __ UntagAndJumpIfSmi(result_reg, input_reg, &is_smi);
 
   // Check for heap number
@@ skipping 880 matching lines @@
   __ sub(scratch, result, Operand(index, LSL, kPointerSizeLog2 - kSmiTagSize));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal