void LCodeGen::DoMathSqrt(LMathSqrt* instr) {
- X87Register input_reg = ToX87Register(instr->value());
- X87Register output_reg = ToX87Register(instr->result());
- DCHECK(output_reg.is(input_reg));
- USE(output_reg);
- X87Fxch(input_reg);
- __ fsqrt();
+ X87Register input = ToX87Register(instr->value());
+ X87Register result_reg = ToX87Register(instr->result());
+ Register temp_result = ToRegister(instr->temp1());
+ Register temp = ToRegister(instr->temp2());
+ Label slow, done, smi, finish;
+ DCHECK(result_reg.is(input));
+
+ // Store input into Heap number and call runtime function kMathExpRT.
+ if (FLAG_inline_new) {
+ __ AllocateHeapNumber(temp_result, temp, no_reg, &slow);
+ __ jmp(&done, Label::kNear);
+ }
+
+ // 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.
+ __ Move(temp_result, Immediate(0));
+
+ // Preserve the value of all registers.
+ PushSafepointRegistersScope scope(this);
+
+ __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
+ __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
+ RecordSafepointWithRegisters(
+ instr->pointer_map(), 0, Safepoint::kNoLazyDeopt);
+ __ StoreToSafepointRegisterSlot(temp_result, eax);
+ }
+ __ bind(&done);
+ X87LoadForUsage(input);
+ __ fstp_d(FieldOperand(temp_result, HeapNumber::kValueOffset));
+
+ {
+ // Preserve the value of all registers.
+ PushSafepointRegistersScope scope(this);
+
+ __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
+ __ push(temp_result);
+ __ CallRuntimeSaveDoubles(Runtime::kMathSqrtRT);
+ RecordSafepointWithRegisters(
+ instr->pointer_map(), 0, Safepoint::kNoLazyDeopt);
+ __ StoreToSafepointRegisterSlot(temp_result, eax);
+ }
+ X87PrepareToWrite(result_reg);
+ // return value of MathExpRT is Smi or Heap Number.
+ __ JumpIfSmi(temp_result, &smi);
+ // Heap number(double)
+ __ fld_d(FieldOperand(temp_result, HeapNumber::kValueOffset));
+ __ jmp(&finish);
+ // SMI
+ __ bind(&smi);
+ __ SmiUntag(temp_result);
+ __ push(temp_result);
+ __ fild_s(MemOperand(esp, 0));
+ __ pop(temp_result);
+ __ bind(&finish);
+ X87CommitWrite(result_reg);
}
};
-class LMathSqrt FINAL : public LTemplateInstruction<1, 1, 0> {
+class LMathSqrt FINAL : public LTemplateInstruction<1, 1, 2> {
public:
- explicit LMathSqrt(LOperand* value) {
+ explicit LMathSqrt(LOperand* value,
+ LOperand* temp1,
+ LOperand* temp2) {
inputs_[0] = value;
+ temps_[0] = temp1;
+ temps_[1] = temp2;
}
LOperand* value() { return inputs_[0]; }
+ LOperand* temp1() { return temps_[0]; }
+ LOperand* temp2() { return temps_[1]; }
DECLARE_CONCRETE_INSTRUCTION(MathSqrt, "math-sqrt")
};