void ToNumberStub::Generate(MacroAssembler* masm) {
// The ToNumber stub takes one argument in a0.
- Label check_heap_number, call_builtin;
- __ JumpIfNotSmi(a0, &check_heap_number);
+ Label not_smi;
+ __ JumpIfNotSmi(a0, ¬_smi);
__ Ret(USE_DELAY_SLOT);
__ mov(v0, a0);
+ __ bind(¬_smi);
- __ bind(&check_heap_number);
+ Label not_heap_number;
__ lw(a1, FieldMemOperand(a0, HeapObject::kMapOffset));
- __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
- __ Branch(&call_builtin, ne, a1, Operand(at));
+ __ lbu(a1, FieldMemOperand(a1, Map::kInstanceTypeOffset));
+ // a0: object
+ // a1: instance type.
+ __ Branch(¬_heap_number, ne, a1, Operand(HEAP_NUMBER_TYPE));
+ __ Ret(USE_DELAY_SLOT);
+ __ mov(v0, a0);
+ __ bind(¬_heap_number);
+
+ Label not_string, slow_string;
+ __ Branch(¬_string, hs, a1, Operand(FIRST_NONSTRING_TYPE));
+ // Check if string has a cached array index.
+ __ lw(a2, FieldMemOperand(a0, String::kHashFieldOffset));
+ __ And(at, a2, Operand(String::kContainsCachedArrayIndexMask));
+ __ Branch(&slow_string, ne, at, Operand(zero_reg));
+ __ IndexFromHash(a2, a0);
__ Ret(USE_DELAY_SLOT);
__ mov(v0, a0);
+ __ bind(&slow_string);
+ __ push(a0); // Push argument.
+ __ TailCallRuntime(Runtime::kStringToNumber, 1, 1);
+ __ bind(¬_string);
+
+ Label not_oddball;
+ __ Branch(¬_oddball, ne, a1, Operand(ODDBALL_TYPE));
+ __ Ret(USE_DELAY_SLOT);
+ __ lw(v0, FieldMemOperand(a0, Oddball::kToNumberOffset));
+ __ bind(¬_oddball);
- __ bind(&call_builtin);
- __ push(a0);
+ __ push(a0); // Push argument.
__ InvokeBuiltin(Builtins::TO_NUMBER, JUMP_FUNCTION);
}
void ToNumberStub::Generate(MacroAssembler* masm) {
// The ToNumber stub takes one argument in a0.
- Label check_heap_number, call_builtin;
- __ JumpIfNotSmi(a0, &check_heap_number);
+ Label not_smi;
+ __ JumpIfNotSmi(a0, ¬_smi);
__ Ret(USE_DELAY_SLOT);
__ mov(v0, a0);
+ __ bind(¬_smi);
- __ bind(&check_heap_number);
+ Label not_heap_number;
__ ld(a1, FieldMemOperand(a0, HeapObject::kMapOffset));
- __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
- __ Branch(&call_builtin, ne, a1, Operand(at));
+ __ lbu(a1, FieldMemOperand(a1, Map::kInstanceTypeOffset));
+ // a0: object
+ // a1: instance type.
+ __ Branch(¬_heap_number, ne, a1, Operand(HEAP_NUMBER_TYPE));
+ __ Ret(USE_DELAY_SLOT);
+ __ mov(v0, a0);
+ __ bind(¬_heap_number);
+
+ Label not_string, slow_string;
+ __ Branch(¬_string, hs, a1, Operand(FIRST_NONSTRING_TYPE));
+ // Check if string has a cached array index.
+ __ ld(a2, FieldMemOperand(a0, String::kHashFieldOffset));
+ __ And(at, a2, Operand(String::kContainsCachedArrayIndexMask));
+ __ Branch(&slow_string, ne, at, Operand(zero_reg));
+ __ IndexFromHash(a2, a0);
__ Ret(USE_DELAY_SLOT);
__ mov(v0, a0);
+ __ bind(&slow_string);
+ __ push(a0); // Push argument.
+ __ TailCallRuntime(Runtime::kStringToNumber, 1, 1);
+ __ bind(¬_string);
+
+ Label not_oddball;
+ __ Branch(¬_oddball, ne, a1, Operand(ODDBALL_TYPE));
+ __ Ret(USE_DELAY_SLOT);
+ __ ld(v0, FieldMemOperand(a0, Oddball::kToNumberOffset));
+ __ bind(¬_oddball);
- __ bind(&call_builtin);
- __ push(a0);
+ __ push(a0); // Push argument.
__ InvokeBuiltin(Builtins::TO_NUMBER, JUMP_FUNCTION);
}