int64_t JIT_OPERATION operationConvertBoxedDoubleToInt52(EncodedJSValue encodedValue)
{
JSValue value = JSValue::decode(encodedValue);
if (!value.isDouble())
return JSValue::notInt52;
return tryConvertToInt52(value.asDouble());
}
ALWAYS_INLINE static void DFG_OPERATION operationPutByValInternal(ExecState* exec, EncodedJSValue encodedBase, EncodedJSValue encodedProperty, EncodedJSValue encodedValue)
{
JSGlobalData* globalData = &exec->globalData();
NativeCallFrameTracer tracer(globalData, exec);
JSValue baseValue = JSValue::decode(encodedBase);
JSValue property = JSValue::decode(encodedProperty);
JSValue value = JSValue::decode(encodedValue);
if (LIKELY(property.isUInt32())) {
putByVal<strict>(exec, baseValue, property.asUInt32(), value);
return;
}
if (property.isDouble()) {
double propertyAsDouble = property.asDouble();
uint32_t propertyAsUInt32 = static_cast<uint32_t>(propertyAsDouble);
if (propertyAsDouble == propertyAsUInt32) {
putByVal<strict>(exec, baseValue, propertyAsUInt32, value);
return;
}
}
// Don't put to an object if toString throws an exception.
Identifier ident(exec, property.toString(exec)->value(exec));
if (!globalData->exception) {
PutPropertySlot slot(strict);
baseValue.put(exec, ident, value, slot);
}
}
EncodedJSValue JIT_OPERATION operationGetByValCell(ExecState* exec, JSCell* base, EncodedJSValue encodedProperty)
{
VM& vm = exec->vm();
NativeCallFrameTracer tracer(&vm, exec);
JSValue property = JSValue::decode(encodedProperty);
if (property.isUInt32())
return getByVal(exec, base, property.asUInt32());
if (property.isDouble()) {
double propertyAsDouble = property.asDouble();
uint32_t propertyAsUInt32 = static_cast<uint32_t>(propertyAsDouble);
if (propertyAsUInt32 == propertyAsDouble)
return getByVal(exec, base, propertyAsUInt32);
} else if (property.isString()) {
Structure& structure = *base->structure(vm);
if (JSCell::canUseFastGetOwnProperty(structure)) {
if (AtomicStringImpl* existingAtomicString = asString(property)->toExistingAtomicString(exec)) {
if (JSValue result = base->fastGetOwnProperty(vm, structure, existingAtomicString))
return JSValue::encode(result);
}
}
}
PropertyName propertyName = property.toPropertyKey(exec);
return JSValue::encode(JSValue(base).get(exec, propertyName));
}
static CodeBlock* codeBlockFromArg(ExecState* exec)
{
VM& vm = exec->vm();
if (exec->argumentCount() < 1)
return nullptr;
JSValue value = exec->uncheckedArgument(0);
CodeBlock* candidateCodeBlock = nullptr;
if (value.isCell()) {
JSFunction* func = jsDynamicCast<JSFunction*>(vm, value.asCell());
if (func) {
if (func->isHostFunction())
candidateCodeBlock = nullptr;
else
candidateCodeBlock = func->jsExecutable()->eitherCodeBlock();
}
} else if (value.isDouble()) {
// If the value is a double, it may be an encoded CodeBlock* that came from
// $vm.codeBlockForFrame(). We'll treat it as a candidate codeBlock and check if it's
// valid below before using.
candidateCodeBlock = reinterpret_cast<CodeBlock*>(bitwise_cast<uint64_t>(value.asDouble()));
}
if (candidateCodeBlock && JSDollarVMPrototype::isValidCodeBlock(exec, candidateCodeBlock))
return candidateCodeBlock;
if (candidateCodeBlock)
dataLog("Invalid codeBlock: ", RawPointer(candidateCodeBlock), " ", value, "\n");
else
dataLog("Invalid codeBlock: ", value, "\n");
return nullptr;
}
ALWAYS_INLINE static void JIT_OPERATION operationPutByValInternal(ExecState* exec, EncodedJSValue encodedBase, EncodedJSValue encodedProperty, EncodedJSValue encodedValue)
{
VM* vm = &exec->vm();
NativeCallFrameTracer tracer(vm, exec);
JSValue baseValue = JSValue::decode(encodedBase);
JSValue property = JSValue::decode(encodedProperty);
JSValue value = JSValue::decode(encodedValue);
if (LIKELY(property.isUInt32())) {
putByVal<strict, direct>(exec, baseValue, property.asUInt32(), value);
return;
}
if (property.isDouble()) {
double propertyAsDouble = property.asDouble();
uint32_t propertyAsUInt32 = static_cast<uint32_t>(propertyAsDouble);
if (propertyAsDouble == propertyAsUInt32) {
putByVal<strict, direct>(exec, baseValue, propertyAsUInt32, value);
return;
}
}
// Don't put to an object if toString throws an exception.
PropertyName propertyName = property.toPropertyKey(exec);
if (!vm->exception()) {
PutPropertySlot slot(baseValue, strict);
if (direct) {
RELEASE_ASSERT(baseValue.isObject());
asObject(baseValue)->putDirect(*vm, propertyName, value, slot);
} else
baseValue.put(exec, propertyName, value, slot);
}
}
EncodedJSValue DFG_OPERATION operationGetByVal(ExecState* exec, EncodedJSValue encodedBase, EncodedJSValue encodedProperty)
{
JSGlobalData* globalData = &exec->globalData();
NativeCallFrameTracer tracer(globalData, exec);
JSValue baseValue = JSValue::decode(encodedBase);
JSValue property = JSValue::decode(encodedProperty);
if (LIKELY(baseValue.isCell())) {
JSCell* base = baseValue.asCell();
if (property.isUInt32()) {
return getByVal(exec, base, property.asUInt32());
} else if (property.isDouble()) {
double propertyAsDouble = property.asDouble();
uint32_t propertyAsUInt32 = static_cast<uint32_t>(propertyAsDouble);
if (propertyAsUInt32 == propertyAsDouble)
return getByVal(exec, base, propertyAsUInt32);
} else if (property.isString()) {
if (JSValue result = base->fastGetOwnProperty(exec, asString(property)->value(exec)))
return JSValue::encode(result);
}
}
Identifier ident(exec, property.toString(exec)->value(exec));
return JSValue::encode(baseValue.get(exec, ident));
}
void dumpImmediate(JSValue value)
{
if (value.isNull())
write(NullTag);
else if (value.isUndefined())
write(UndefinedTag);
else if (value.isNumber()) {
if (value.isInt32()) {
if (!value.asInt32())
write(ZeroTag);
else if (value.asInt32() == 1)
write(OneTag);
else {
write(IntTag);
write(static_cast<uint32_t>(value.asInt32()));
}
} else {
write(DoubleTag);
write(value.asDouble());
}
} else if (value.isBoolean()) {
if (value.isTrue())
write(TrueTag);
else
write(FalseTag);
}
}
char* JIT_OPERATION operationFindSwitchImmTargetForDouble(
ExecState* exec, EncodedJSValue encodedValue, size_t tableIndex)
{
CodeBlock* codeBlock = exec->codeBlock();
SimpleJumpTable& table = codeBlock->switchJumpTable(tableIndex);
JSValue value = JSValue::decode(encodedValue);
ASSERT(value.isDouble());
double asDouble = value.asDouble();
int32_t asInt32 = static_cast<int32_t>(asDouble);
if (asDouble == asInt32)
return static_cast<char*>(table.ctiForValue(asInt32).executableAddress());
return static_cast<char*>(table.ctiDefault.executableAddress());
}
// ECMA-262 20.1.2.5
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsSafeInteger(ExecState* exec)
{
JSValue argument = exec->argument(0);
bool isInteger;
if (argument.isInt32())
isInteger = true;
else if (!argument.isDouble())
isInteger = false;
else {
double number = argument.asDouble();
isInteger = trunc(number) == number && std::abs(number) <= 9007199254740991.0;
}
return JSValue::encode(jsBoolean(isInteger));
}
// ECMA-262 20.1.2.3
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsInteger(ExecState* exec)
{
JSValue argument = exec->argument(0);
bool isInteger;
if (argument.isInt32())
isInteger = true;
else if (!argument.isDouble())
isInteger = false;
else {
double number = argument.asDouble();
isInteger = std::isfinite(number) && trunc(number) == number;
}
return JSValue::encode(jsBoolean(isInteger));
}
EncodedJSValue DFG_OPERATION operationGetByValCell(ExecState* exec, JSCell* base, EncodedJSValue encodedProperty)
{
JSValue property = JSValue::decode(encodedProperty);
if (property.isUInt32())
return getByVal(exec, base, property.asUInt32());
if (property.isDouble()) {
double propertyAsDouble = property.asDouble();
uint32_t propertyAsUInt32 = static_cast<uint32_t>(propertyAsDouble);
if (propertyAsUInt32 == propertyAsDouble)
return getByVal(exec, base, propertyAsUInt32);
} else if (property.isString()) {
if (JSValue result = base->fastGetOwnProperty(exec, asString(property)->value(exec)))
return JSValue::encode(result);
}
Identifier ident(exec, property.toString(exec));
return JSValue::encode(JSValue(base).get(exec, ident));
}
static ALWAYS_INLINE bool toThisNumber(JSValue thisValue, double& x)
{
if (thisValue.isInt32()) {
x = thisValue.asInt32();
return true;
}
if (thisValue.isDouble()) {
x = thisValue.asDouble();
return true;
}
if (thisValue.isCell() && thisValue.asCell()->type() == NumberObjectType) {
x = static_cast<const NumberObject*>(thisValue.asCell())->internalValue().asNumber();
return true;
}
return false;
}
static CodeBlock* codeBlockFromArg(ExecState* exec)
{
if (exec->argumentCount() < 1)
return nullptr;
JSValue value = exec->uncheckedArgument(0);
if (!value.isDouble()) {
dataLog("Invalid codeBlock: ", value, "\n");
return nullptr;
}
CodeBlock* codeBlock = reinterpret_cast<CodeBlock*>(bitwise_cast<uint64_t>(value.asDouble()));
if (JSDollarVMPrototype::isValidCodeBlock(exec, codeBlock))
return codeBlock;
dataLogF("Invalid codeBlock: %p ", codeBlock);
dataLog(value, "\n");
return nullptr;
}
ALWAYS_INLINE static void JIT_OPERATION operationPutByValInternal(ExecState* exec, EncodedJSValue encodedBase, EncodedJSValue encodedProperty, EncodedJSValue encodedValue)
{
VM* vm = &exec->vm();
NativeCallFrameTracer tracer(vm, exec);
JSValue baseValue = JSValue::decode(encodedBase);
JSValue property = JSValue::decode(encodedProperty);
JSValue value = JSValue::decode(encodedValue);
if (LIKELY(property.isUInt32())) {
// Despite its name, JSValue::isUInt32 will return true only for positive boxed int32_t; all those values are valid array indices.
ASSERT(isIndex(property.asUInt32()));
putByVal<strict, direct>(exec, baseValue, property.asUInt32(), value);
return;
}
if (property.isDouble()) {
double propertyAsDouble = property.asDouble();
uint32_t propertyAsUInt32 = static_cast<uint32_t>(propertyAsDouble);
if (propertyAsDouble == propertyAsUInt32 && isIndex(propertyAsUInt32)) {
putByVal<strict, direct>(exec, baseValue, propertyAsUInt32, value);
return;
}
}
// Don't put to an object if toString throws an exception.
auto propertyName = property.toPropertyKey(exec);
if (vm->exception())
return;
PutPropertySlot slot(baseValue, strict);
if (direct) {
RELEASE_ASSERT(baseValue.isObject());
if (Optional<uint32_t> index = parseIndex(propertyName))
asObject(baseValue)->putDirectIndex(exec, index.value(), value, 0, strict ? PutDirectIndexShouldThrow : PutDirectIndexShouldNotThrow);
else
asObject(baseValue)->putDirect(*vm, propertyName, value, slot);
} else
baseValue.put(exec, propertyName, value, slot);
}
EncodedJSValue JIT_OPERATION operationGetByVal(ExecState* exec, EncodedJSValue encodedBase, EncodedJSValue encodedProperty)
{
VM& vm = exec->vm();
NativeCallFrameTracer tracer(&vm, exec);
JSValue baseValue = JSValue::decode(encodedBase);
JSValue property = JSValue::decode(encodedProperty);
if (LIKELY(baseValue.isCell())) {
JSCell* base = baseValue.asCell();
if (property.isUInt32()) {
return getByVal(exec, base, property.asUInt32());
} else if (property.isDouble()) {
double propertyAsDouble = property.asDouble();
uint32_t propertyAsUInt32 = static_cast<uint32_t>(propertyAsDouble);
if (propertyAsUInt32 == propertyAsDouble && isIndex(propertyAsUInt32))
return getByVal(exec, base, propertyAsUInt32);
} else if (property.isString()) {
Structure& structure = *base->structure(vm);
if (JSCell::canUseFastGetOwnProperty(structure)) {
if (AtomicStringImpl* existingAtomicString = asString(property)->toExistingAtomicString(exec)) {
if (JSValue result = base->fastGetOwnProperty(vm, structure, existingAtomicString))
return JSValue::encode(result);
}
}
}
}
baseValue.requireObjectCoercible(exec);
if (exec->hadException())
return JSValue::encode(jsUndefined());
auto propertyName = property.toPropertyKey(exec);
if (exec->hadException())
return JSValue::encode(jsUndefined());
return JSValue::encode(baseValue.get(exec, propertyName));
}
// ECMA-262 20.1.2.4
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsNaN(ExecState* exec)
{
JSValue argument = exec->argument(0);
return JSValue::encode(jsBoolean(argument.isDouble() && std::isnan(argument.asDouble())));
}
// ECMA-262 20.1.2.2
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsFinite(ExecState* exec)
{
JSValue argument = exec->argument(0);
return JSValue::encode(jsBoolean(argument.isNumber() && (argument.isInt32() || std::isfinite(argument.asDouble()))));
}