ARM: use TempDoubleRegister

src/arm/lithium-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "v8.h"
 
 #include "lithium-allocator-inl.h"
 #include "arm/lithium-arm.h"
 #include "arm/lithium-codegen-arm.h"
 #include "hydrogen-osr.h"
@@ skipping 610 matching lines @@
   int vreg = allocator_->GetVirtualRegister();
   if (!allocator_->AllocationOk()) {
     Abort(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister);
     vreg = 0;
   }
   operand->set_virtual_register(vreg);
   return operand;
 }
 
 
+LUnallocated* LChunkBuilder::TempDoubleRegister() {
+  LUnallocated* operand =
+      new(zone()) LUnallocated(LUnallocated::MUST_HAVE_DOUBLE_REGISTER);
+  int vreg = allocator_->GetVirtualRegister();
+  if (!allocator_->AllocationOk()) {
+    Abort(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister);
+    vreg = 0;
+  }
+  operand->set_virtual_register(vreg);
+  return operand;
+}
+
+
 LOperand* LChunkBuilder::FixedTemp(Register reg) {
   LUnallocated* operand = ToUnallocated(reg);
   ASSERT(operand->HasFixedPolicy());
   return operand;
 }
 
 
 LOperand* LChunkBuilder::FixedTemp(DoubleRegister reg) {
   LUnallocated* operand = ToUnallocated(reg);
   ASSERT(operand->HasFixedPolicy());
@@ skipping 471 matching lines @@
 
 LInstruction* LChunkBuilder::DoMathFloor(HUnaryMathOperation* instr) {
   LOperand* input = UseRegister(instr->value());
   LMathFloor* result = new(zone()) LMathFloor(input);
   return AssignEnvironment(AssignPointerMap(DefineAsRegister(result)));
 }
 
 
 LInstruction* LChunkBuilder::DoMathRound(HUnaryMathOperation* instr) {
   LOperand* input = UseRegister(instr->value());
-  LOperand* temp = FixedTemp(d3);
+  LOperand* temp = TempDoubleRegister();
   LMathRound* result = new(zone()) LMathRound(input, temp);
   return AssignEnvironment(DefineAsRegister(result));
 }
 
 
 LInstruction* LChunkBuilder::DoMathAbs(HUnaryMathOperation* instr) {
   Representation r = instr->value()->representation();
   LOperand* context = (r.IsDouble() || r.IsSmiOrInteger32())
       ? NULL
       : UseFixed(instr->context(), cp);
@@ skipping 20 matching lines @@
   return DefineAsRegister(result);
 }
 
 
 LInstruction* LChunkBuilder::DoMathExp(HUnaryMathOperation* instr) {
   ASSERT(instr->representation().IsDouble());
   ASSERT(instr->value()->representation().IsDouble());
   LOperand* input = UseRegister(instr->value());
   LOperand* temp1 = TempRegister();
   LOperand* temp2 = TempRegister();
-  LOperand* double_temp = FixedTemp(d3);  // Chosen by fair dice roll.
+  LOperand* double_temp = TempDoubleRegister();
   LMathExp* result = new(zone()) LMathExp(input, double_temp, temp1, temp2);
   return DefineAsRegister(result);
 }
 
 
 LInstruction* LChunkBuilder::DoMathSqrt(HUnaryMathOperation* instr) {
   LOperand* input = UseRegisterAtStart(instr->value());
   LMathSqrt* result = new(zone()) LMathSqrt(input);
   return DefineAsRegister(result);
 }
@@ skipping 105 matching lines @@
   return result;
 }
 
 
 LInstruction* LChunkBuilder::DoDivI(HDiv* instr) {
   ASSERT(instr->representation().IsSmiOrInteger32());
   ASSERT(instr->left()->representation().Equals(instr->representation()));
   ASSERT(instr->right()->representation().Equals(instr->representation()));
   LOperand* dividend = UseRegister(instr->left());
   LOperand* divisor = UseRegister(instr->right());
-  LOperand* temp = CpuFeatures::IsSupported(SUDIV) ? NULL : FixedTemp(d4);
+  LOperand* temp =
+      CpuFeatures::IsSupported(SUDIV) ? NULL : TempDoubleRegister();
   LInstruction* result =
       DefineAsRegister(new(zone()) LDivI(dividend, divisor, temp));
   if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
       instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
       (instr->CheckFlag(HValue::kCanOverflow) &&
        (!CpuFeatures::IsSupported(SUDIV) ||
         !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32))) ||
       (!instr->IsMathFloorOfDiv() &&
        !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32))) {
     result = AssignEnvironment(result);
@@ skipping 51 matching lines @@
   return result;
 }
 
 
 LInstruction* LChunkBuilder::DoFlooringDivI(HMathFloorOfDiv* instr) {
   ASSERT(instr->representation().IsSmiOrInteger32());
   ASSERT(instr->left()->representation().Equals(instr->representation()));
   ASSERT(instr->right()->representation().Equals(instr->representation()));
   LOperand* dividend = UseRegister(instr->left());
   LOperand* divisor = UseRegister(instr->right());
-  LOperand* temp = CpuFeatures::IsSupported(SUDIV) ? NULL : FixedTemp(d4);
+  LOperand* temp =
+      CpuFeatures::IsSupported(SUDIV) ? NULL : TempDoubleRegister();
   LFlooringDivI* div = new(zone()) LFlooringDivI(dividend, divisor, temp);
   return AssignEnvironment(DefineAsRegister(div));
 }
 
 
 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
   if (instr->RightIsPowerOf2()) {
     return DoFlooringDivByPowerOf2I(instr);
   } else if (instr->right()->IsConstant()) {
     return DoFlooringDivByConstI(instr);
@@ skipping 32 matching lines @@
   return result;
 }
 
 
 LInstruction* LChunkBuilder::DoModI(HMod* instr) {
   ASSERT(instr->representation().IsSmiOrInteger32());
   ASSERT(instr->left()->representation().Equals(instr->representation()));
   ASSERT(instr->right()->representation().Equals(instr->representation()));
   LOperand* dividend = UseRegister(instr->left());
   LOperand* divisor = UseRegister(instr->right());
-  LOperand* temp = CpuFeatures::IsSupported(SUDIV) ? NULL : FixedTemp(d10);
-  LOperand* temp2 = CpuFeatures::IsSupported(SUDIV) ? NULL : FixedTemp(d11);
+  LOperand* temp =
+      CpuFeatures::IsSupported(SUDIV) ? NULL : TempDoubleRegister();
+  LOperand* temp2 =
+      CpuFeatures::IsSupported(SUDIV) ? NULL : TempDoubleRegister();
   LInstruction* result = DefineAsRegister(new(zone()) LModI(
           dividend, divisor, temp, temp2));
   if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
       instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
     result = AssignEnvironment(result);
   }
   return result;
 }
 
 
@@ skipping 459 matching lines @@
       }
       return AssignEnvironment(DefineSameAsFirst(new(zone()) LCheckSmi(value)));
     } else {
       ASSERT(to.IsInteger32());
       if (val->type().IsSmi() || val->representation().IsSmi()) {
         LOperand* value = UseRegisterAtStart(val);
         return DefineAsRegister(new(zone()) LSmiUntag(value, false));
       } else {
         LOperand* value = UseRegister(val);
         LOperand* temp1 = TempRegister();
-        LOperand* temp2 = FixedTemp(d11);
+        LOperand* temp2 = TempDoubleRegister();
         LInstruction* result =
             DefineSameAsFirst(new(zone()) LTaggedToI(value, temp1, temp2));
         if (!val->representation().IsSmi()) result = AssignEnvironment(result);
         return result;
       }
     }
   } else if (from.IsDouble()) {
     if (to.IsTagged()) {
       info()->MarkAsDeferredCalling();
       LOperand* value = UseRegister(val);
@@ skipping 97 matching lines @@
   Representation input_rep = value->representation();
   LOperand* reg = UseRegister(value);
   if (input_rep.IsDouble()) {
     return DefineAsRegister(new(zone()) LClampDToUint8(reg));
   } else if (input_rep.IsInteger32()) {
     return DefineAsRegister(new(zone()) LClampIToUint8(reg));
   } else {
     ASSERT(input_rep.IsSmiOrTagged());
     // Register allocator doesn't (yet) support allocation of double
     // temps. Reserve d1 explicitly.
-    LClampTToUint8* result = new(zone()) LClampTToUint8(reg, FixedTemp(d11));
+    LClampTToUint8* result =
+        new(zone()) LClampTToUint8(reg, TempDoubleRegister());
     return AssignEnvironment(DefineAsRegister(result));
   }
 }
 
 
 LInstruction* LChunkBuilder::DoDoubleBits(HDoubleBits* instr) {
   HValue* value = instr->value();
   ASSERT(value->representation().IsDouble());
   return DefineAsRegister(new(zone()) LDoubleBits(UseRegister(value)));
 }
@@ skipping 545 matching lines @@
 
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseTempRegister(instr->index());
   LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
   LInstruction* result = DefineSameAsFirst(load);
   return AssignPointerMap(result);
 }
 
 } }  // namespace v8::internal