void LCodeGen::EmitNumberUntagD(Register input_reg,
DoubleRegister result_reg,
bool deoptimize_on_undefined,
+ bool deoptimize_on_minus_zero,
LEnvironment* env) {
Register scratch = scratch0();
SwVfpRegister flt_scratch = double_scratch0().low();
// Heap number to double register conversion.
__ sub(ip, input_reg, Operand(kHeapObjectTag));
__ vldr(result_reg, ip, HeapNumber::kValueOffset);
+ if (deoptimize_on_minus_zero) {
+ __ vmov(ip, result_reg.low());
+ __ cmp(ip, Operand(0));
+ __ b(ne, &done);
+ __ vmov(ip, result_reg.high());
+ __ cmp(ip, Operand(HeapNumber::kSignMask));
+ DeoptimizeIf(eq, env);
+ }
__ jmp(&done);
// Smi to double register conversion
EmitNumberUntagD(input_reg, result_reg,
instr->hydrogen()->deoptimize_on_undefined(),
+ instr->hydrogen()->deoptimize_on_minus_zero(),
instr->environment());
}
void EmitNumberUntagD(Register input,
DoubleRegister result,
bool deoptimize_on_undefined,
+ bool deoptimize_on_minus_zero,
LEnvironment* env);
// Emits optimized code for typeof x == "y". Modifies input register.
bool deoptimize_on_undefined() const {
return CheckFlag(kDeoptimizeOnUndefined);
}
+ bool deoptimize_on_minus_zero() const {
+ return CheckFlag(kBailoutOnMinusZero);
+ }
virtual Representation RequiredInputRepresentation(int index) {
return from();
}
return true;
}
break;
+ case kMathMax:
+ case kMathMin:
+ if (argument_count == 3 && check_type == RECEIVER_MAP_CHECK) {
+ AddCheckConstantFunction(expr, receiver, receiver_map, true);
+ HValue* right = Pop();
+ HValue* left = Pop();
+ // Do not inline if the return representation is not certain.
+ if (!left->representation().Equals(right->representation())) {
+ Push(left);
+ Push(right);
+ return false;
+ }
+
+ Pop(); // Pop receiver.
+ Token::Value op = (id == kMathMin) ? Token::LT : Token::GT;
+ HCompareIDAndBranch* compare = NULL;
+
+ if (left->representation().IsTagged()) {
+ HChange* left_cvt =
+ new(zone()) HChange(left, Representation::Double(), false, true);
+ left_cvt->SetFlag(HValue::kBailoutOnMinusZero);
+ AddInstruction(left_cvt);
+ HChange* right_cvt =
+ new(zone()) HChange(right, Representation::Double(), false, true);
+ right_cvt->SetFlag(HValue::kBailoutOnMinusZero);
+ AddInstruction(right_cvt);
+ compare = new(zone()) HCompareIDAndBranch(left_cvt, right_cvt, op);
+ compare->SetInputRepresentation(Representation::Double());
+ } else {
+ compare = new(zone()) HCompareIDAndBranch(left, right, op);
+ compare->SetInputRepresentation(left->representation());
+ }
+
+ HBasicBlock* return_left = graph()->CreateBasicBlock();
+ HBasicBlock* return_right = graph()->CreateBasicBlock();
+
+ compare->SetSuccessorAt(0, return_left);
+ compare->SetSuccessorAt(1, return_right);
+ current_block()->Finish(compare);
+
+ set_current_block(return_left);
+ Push(left);
+ set_current_block(return_right);
+ Push(right);
+
+ HBasicBlock* join = CreateJoin(return_left, return_right, expr->id());
+ set_current_block(join);
+ ast_context()->ReturnValue(Pop());
+ return true;
+ }
+ break;
default:
// Not yet supported for inlining.
break;
void LCodeGen::EmitNumberUntagD(Register input_reg,
+ Register temp_reg,
XMMRegister result_reg,
bool deoptimize_on_undefined,
+ bool deoptimize_on_minus_zero,
LEnvironment* env) {
Label load_smi, done;
}
// Heap number to XMM conversion.
__ movdbl(result_reg, FieldOperand(input_reg, HeapNumber::kValueOffset));
+ if (deoptimize_on_minus_zero) {
+ XMMRegister xmm_scratch = xmm0;
+ __ xorps(xmm_scratch, xmm_scratch);
+ __ ucomisd(result_reg, xmm_scratch);
+ __ j(not_zero, &done, Label::kNear);
+ __ movmskpd(temp_reg, result_reg);
+ __ test_b(temp_reg, 1);
+ DeoptimizeIf(not_zero, env);
+ }
__ jmp(&done, Label::kNear);
// Smi to XMM conversion
void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
LOperand* input = instr->InputAt(0);
ASSERT(input->IsRegister());
+ LOperand* temp = instr->TempAt(0);
+ ASSERT(temp == NULL || temp->IsRegister());
LOperand* result = instr->result();
ASSERT(result->IsDoubleRegister());
Register input_reg = ToRegister(input);
XMMRegister result_reg = ToDoubleRegister(result);
- EmitNumberUntagD(input_reg, result_reg,
+ bool deoptimize_on_minus_zero =
+ instr->hydrogen()->deoptimize_on_minus_zero();
+ Register temp_reg = deoptimize_on_minus_zero ? ToRegister(temp) : no_reg;
+
+ EmitNumberUntagD(input_reg,
+ temp_reg,
+ result_reg,
instr->hydrogen()->deoptimize_on_undefined(),
+ deoptimize_on_minus_zero,
instr->environment());
}
void EmitGoto(int block);
void EmitBranch(int left_block, int right_block, Condition cc);
void EmitNumberUntagD(Register input,
+ Register temp,
XMMRegister result,
bool deoptimize_on_undefined,
+ bool deoptimize_on_minus_zero,
LEnvironment* env);
// Emits optimized code for typeof x == "y". Modifies input register.
if (from.IsTagged()) {
if (to.IsDouble()) {
LOperand* value = UseRegister(instr->value());
- LNumberUntagD* res = new(zone()) LNumberUntagD(value);
+ // Temp register only necessary for minus zero check.
+ LOperand* temp = instr->deoptimize_on_minus_zero()
+ ? TempRegister()
+ : NULL;
+ LNumberUntagD* res = new(zone()) LNumberUntagD(value, temp);
return AssignEnvironment(DefineAsRegister(res));
} else {
ASSERT(to.IsInteger32());
};
-class LNumberUntagD: public LTemplateInstruction<1, 1, 0> {
+class LNumberUntagD: public LTemplateInstruction<1, 1, 1> {
public:
- explicit LNumberUntagD(LOperand* value) {
+ explicit LNumberUntagD(LOperand* value, LOperand* temp) {
inputs_[0] = value;
+ temps_[0] = temp;
}
DECLARE_CONCRETE_INSTRUCTION(NumberUntagD, "double-untag")
V(Math, exp, MathExp) \
V(Math, sqrt, MathSqrt) \
V(Math, pow, MathPow) \
- V(Math, random, MathRandom)
+ V(Math, random, MathRandom) \
+ V(Math, max, MathMax) \
+ V(Math, min, MathMin)
enum BuiltinFunctionId {
void LCodeGen::EmitNumberUntagD(Register input_reg,
XMMRegister result_reg,
bool deoptimize_on_undefined,
+ bool deoptimize_on_minus_zero,
LEnvironment* env) {
Label load_smi, done;
}
// Heap number to XMM conversion.
__ movsd(result_reg, FieldOperand(input_reg, HeapNumber::kValueOffset));
+ if (deoptimize_on_minus_zero) {
+ XMMRegister xmm_scratch = xmm0;
+ __ xorps(xmm_scratch, xmm_scratch);
+ __ ucomisd(xmm_scratch, result_reg);
+ __ j(not_equal, &done, Label::kNear);
+ __ movmskpd(kScratchRegister, result_reg);
+ __ testq(kScratchRegister, Immediate(1));
+ DeoptimizeIf(not_zero, env);
+ }
__ jmp(&done, Label::kNear);
// Smi to XMM conversion
EmitNumberUntagD(input_reg, result_reg,
instr->hydrogen()->deoptimize_on_undefined(),
+ instr->hydrogen()->deoptimize_on_minus_zero(),
instr->environment());
}
void EmitNumberUntagD(Register input,
XMMRegister result,
bool deoptimize_on_undefined,
+ bool deoptimize_on_minus_zero,
LEnvironment* env);
// Emits optimized code for typeof x == "y". Modifies input register.
assertEquals(Infinity, 1/Math.max(ZERO, -0));
assertEquals(Infinity, 1/Math.max(-0, ZERO));
+
+function run(crankshaft_test) {
+ crankshaft_test(1);
+ crankshaft_test(1);
+ %OptimizeFunctionOnNextCall(crankshaft_test);
+ crankshaft_test(-0);
+}
+
+function crankshaft_test_1(arg) {
+ var v1 = 1;
+ var v2 = 5;
+ var v3 = 1.5;
+ var v4 = 5.5;
+ var v5 = 2;
+ var v6 = 6;
+ var v7 = 0;
+ var v8 = -0;
+
+ var v9 = 9.9;
+ var v0 = 10.1;
+ // Integer32 representation.
+ assertEquals(v2, Math.max(v1++, v2++));
+ assertEquals(v1, Math.min(v1++, v2++));
+ // Tagged representation.
+ assertEquals(v4, Math.max(v3, v4));
+ assertEquals(v3, Math.min(v3, v4));
+ assertEquals(v6, Math.max(v5, v6));
+ assertEquals(v5, Math.min(v5, v6));
+ // Double representation.
+ assertEquals(v0, Math.max(v0++, v9++));
+ assertEquals(v9, Math.min(v0++, v9++));
+ // Minus zero.
+ assertEquals(Infinity, 1/Math.max(v7, v8));
+ assertEquals(-Infinity, 1/Math.min(v7, v8));
+ // NaN.
+ assertEquals(NaN, Math.max(NaN, v8));
+ assertEquals(NaN, Math.min(NaN, v9));
+ assertEquals(NaN, Math.max(v8, NaN));
+ assertEquals(NaN, Math.min(v9, NaN));
+ // Minus zero as Integer32.
+ assertEquals((arg === -0) ? -Infinity : 1, 1/Math.min(arg, v2));
+}
+
+run(crankshaft_test_1);
+
+function crankshaft_test_2() {
+ var v9 = {};
+ v9.valueOf = function() { return 6; }
+ // Deopt expected due to non-heapnumber objects.
+ assertEquals(6, Math.min(v9, 12));
+}
+
+run(crankshaft_test_2);
+
+// Test overriding Math.min and Math.max
+Math.min = function(a, b) { return a + b; }
+Math.max = function(a, b) { return a - b; }
+
+function crankshaft_test_3() {
+ assertEquals(8, Math.min(3, 5));
+ assertEquals(3, Math.max(5, 2));
+}
+
+run(crankshaft_test_3);