TypedArrayCommon.h
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef vm_TypedArrayCommon_h
#define vm_TypedArrayCommon_h
/* Utilities and common inline code for TypedArray */
#include "mozilla/Assertions.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/PodOperations.h"
#include "jsarray.h"
#include "jscntxt.h"
#include "jsnum.h"
#include "jit/AtomicOperations.h"
#include "js/Conversions.h"
#include "js/Value.h"
#include "vm/NativeObject.h"
#include "vm/TypedArrayObject.h"
namespace js {
// ValueIsLength happens not to be according to ES6, which mandates
// the use of ToLength, which in turn includes ToNumber, ToInteger,
// and clamping. ValueIsLength is used in the current TypedArray code
// but will disappear when that code is made spec-compliant.
inline bool
ValueIsLength(const Value& v, uint32_t* len)
{
if (v.isInt32()) {
int32_t i = v.toInt32();
if (i < 0)
return false;
*len = i;
return true;
}
if (v.isDouble()) {
double d = v.toDouble();
if (mozilla::IsNaN(d))
return false;
uint32_t length = uint32_t(d);
if (d != double(length))
return false;
*len = length;
return true;
}
return false;
}
template<typename To, typename From>
inline To
ConvertNumber(From src);
template<>
inline int8_t
ConvertNumber<int8_t, float>(float src)
{
return JS::ToInt8(src);
}
template<>
inline uint8_t
ConvertNumber<uint8_t, float>(float src)
{
return JS::ToUint8(src);
}
template<>
inline uint8_clamped
ConvertNumber<uint8_clamped, float>(float src)
{
return uint8_clamped(src);
}
template<>
inline int16_t
ConvertNumber<int16_t, float>(float src)
{
return JS::ToInt16(src);
}
template<>
inline uint16_t
ConvertNumber<uint16_t, float>(float src)
{
return JS::ToUint16(src);
}
template<>
inline int32_t
ConvertNumber<int32_t, float>(float src)
{
return JS::ToInt32(src);
}
template<>
inline uint32_t
ConvertNumber<uint32_t, float>(float src)
{
return JS::ToUint32(src);
}
template<> inline int8_t
ConvertNumber<int8_t, double>(double src)
{
return JS::ToInt8(src);
}
template<>
inline uint8_t
ConvertNumber<uint8_t, double>(double src)
{
return JS::ToUint8(src);
}
template<>
inline uint8_clamped
ConvertNumber<uint8_clamped, double>(double src)
{
return uint8_clamped(src);
}
template<>
inline int16_t
ConvertNumber<int16_t, double>(double src)
{
return JS::ToInt16(src);
}
template<>
inline uint16_t
ConvertNumber<uint16_t, double>(double src)
{
return JS::ToUint16(src);
}
template<>
inline int32_t
ConvertNumber<int32_t, double>(double src)
{
return JS::ToInt32(src);
}
template<>
inline uint32_t
ConvertNumber<uint32_t, double>(double src)
{
return JS::ToUint32(src);
}
template<typename To, typename From>
inline To
ConvertNumber(From src)
{
static_assert(!mozilla::IsFloatingPoint<From>::value ||
(mozilla::IsFloatingPoint<From>::value && mozilla::IsFloatingPoint<To>::value),
"conversion from floating point to int should have been handled by "
"specializations above");
return To(src);
}
template<typename NativeType> struct TypeIDOfType;
template<> struct TypeIDOfType<int8_t> { static const Scalar::Type id = Scalar::Int8; };
template<> struct TypeIDOfType<uint8_t> { static const Scalar::Type id = Scalar::Uint8; };
template<> struct TypeIDOfType<int16_t> { static const Scalar::Type id = Scalar::Int16; };
template<> struct TypeIDOfType<uint16_t> { static const Scalar::Type id = Scalar::Uint16; };
template<> struct TypeIDOfType<int32_t> { static const Scalar::Type id = Scalar::Int32; };
template<> struct TypeIDOfType<uint32_t> { static const Scalar::Type id = Scalar::Uint32; };
template<> struct TypeIDOfType<float> { static const Scalar::Type id = Scalar::Float32; };
template<> struct TypeIDOfType<double> { static const Scalar::Type id = Scalar::Float64; };
template<> struct TypeIDOfType<uint8_clamped> { static const Scalar::Type id = Scalar::Uint8Clamped; };
class SharedOps
{
public:
template<typename T>
static T load(SharedMem<T*> addr) {
return js::jit::AtomicOperations::loadSafeWhenRacy(addr);
}
template<typename T>
static void store(SharedMem<T*> addr, T value) {
js::jit::AtomicOperations::storeSafeWhenRacy(addr, value);
}
template<typename T>
static void memcpy(SharedMem<T*> dest, SharedMem<T*> src, size_t size) {
js::jit::AtomicOperations::memcpySafeWhenRacy(dest, src, size);
}
template<typename T>
static void memmove(SharedMem<T*> dest, SharedMem<T*> src, size_t size) {
js::jit::AtomicOperations::memmoveSafeWhenRacy(dest, src, size);
}
template<typename T>
static void podCopy(SharedMem<T*> dest, SharedMem<T*> src, size_t nelem) {
js::jit::AtomicOperations::podCopySafeWhenRacy(dest, src, nelem);
}
template<typename T>
static void podMove(SharedMem<T*> dest, SharedMem<T*> src, size_t nelem) {
js::jit::AtomicOperations::podMoveSafeWhenRacy(dest, src, nelem);
}
static SharedMem<void*> extract(TypedArrayObject* obj) {
return obj->viewDataEither();
}
};
class UnsharedOps
{
public:
template<typename T>
static T load(SharedMem<T*> addr) {
return *addr.unwrapUnshared();
}
template<typename T>
static void store(SharedMem<T*> addr, T value) {
*addr.unwrapUnshared() = value;
}
template<typename T>
static void memcpy(SharedMem<T*> dest, SharedMem<T*> src, size_t size) {
::memcpy(dest.unwrapUnshared(), src.unwrapUnshared(), size);
}
template<typename T>
static void memmove(SharedMem<T*> dest, SharedMem<T*> src, size_t size) {
::memmove(dest.unwrapUnshared(), src.unwrapUnshared(), size);
}
template<typename T>
static void podCopy(SharedMem<T*> dest, SharedMem<T*> src, size_t nelem) {
mozilla::PodCopy(dest.unwrapUnshared(), src.unwrapUnshared(), nelem);
}
template<typename T>
static void podMove(SharedMem<T*> dest, SharedMem<T*> src, size_t nelem) {
mozilla::PodMove(dest.unwrapUnshared(), src.unwrapUnshared(), nelem);
}
static SharedMem<void*> extract(TypedArrayObject* obj) {
return SharedMem<void*>::unshared(obj->viewDataUnshared());
}
};
template<class SpecificArray, typename Ops>
class ElementSpecific
{
typedef typename SpecificArray::ElementType T;
typedef typename SpecificArray::SomeTypedArray SomeTypedArray;
public:
/*
* Copy |source|'s elements into |target|, starting at |target[offset]|.
* Act as if the assignments occurred from a fresh copy of |source|, in
* case the two memory ranges overlap.
*/
static bool
setFromTypedArray(JSContext* cx,
Handle<SomeTypedArray*> target, HandleObject source,
uint32_t offset)
{
MOZ_ASSERT(SpecificArray::ArrayTypeID() == target->type(),
"calling wrong setFromTypedArray specialization");
MOZ_ASSERT(offset <= target->length());
MOZ_ASSERT(source->as<TypedArrayObject>().length() <= target->length() - offset);
if (source->is<SomeTypedArray>()) {
Rooted<SomeTypedArray*> src(cx, source.as<SomeTypedArray>());
if (SomeTypedArray::sameBuffer(target, src))
return setFromOverlappingTypedArray(cx, target, src, offset);
}
SharedMem<T*> dest =
target->template as<TypedArrayObject>().viewDataEither().template cast<T*>() + offset;
uint32_t count = source->as<TypedArrayObject>().length();
if (source->as<TypedArrayObject>().type() == target->type()) {
Ops::podCopy(dest, source->as<TypedArrayObject>().viewDataEither().template cast<T*>(),
count);
return true;
}
// Inhibit unaligned accesses on ARM (bug 1097253, a compiler bug).
#ifdef __arm__
# define JS_VOLATILE_ARM volatile
#else
# define JS_VOLATILE_ARM
#endif
SharedMem<void*> data = Ops::extract(source.as<TypedArrayObject>());
switch (source->as<TypedArrayObject>().type()) {
case Scalar::Int8: {
SharedMem<JS_VOLATILE_ARM int8_t*> src = data.cast<JS_VOLATILE_ARM int8_t*>();
for (uint32_t i = 0; i < count; ++i)
Ops::store(dest++, ConvertNumber<T>(Ops::load(src++)));
break;
}
case Scalar::Uint8:
case Scalar::Uint8Clamped: {
SharedMem<JS_VOLATILE_ARM uint8_t*> src = data.cast<JS_VOLATILE_ARM uint8_t*>();
for (uint32_t i = 0; i < count; ++i)
Ops::store(dest++, ConvertNumber<T>(Ops::load(src++)));
break;
}
case Scalar::Int16: {
SharedMem<JS_VOLATILE_ARM int16_t*> src = data.cast<JS_VOLATILE_ARM int16_t*>();
for (uint32_t i = 0; i < count; ++i)
Ops::store(dest++, ConvertNumber<T>(Ops::load(src++)));
break;
}
case Scalar::Uint16: {
SharedMem<JS_VOLATILE_ARM uint16_t*> src = data.cast<JS_VOLATILE_ARM uint16_t*>();
for (uint32_t i = 0; i < count; ++i)
Ops::store(dest++, ConvertNumber<T>(Ops::load(src++)));
break;
}
case Scalar::Int32: {
SharedMem<JS_VOLATILE_ARM int32_t*> src = data.cast<JS_VOLATILE_ARM int32_t*>();
for (uint32_t i = 0; i < count; ++i)
Ops::store(dest++, ConvertNumber<T>(Ops::load(src++)));
break;
}
case Scalar::Uint32: {
SharedMem<JS_VOLATILE_ARM uint32_t*> src = data.cast<JS_VOLATILE_ARM uint32_t*>();
for (uint32_t i = 0; i < count; ++i)
Ops::store(dest++, ConvertNumber<T>(Ops::load(src++)));
break;
}
case Scalar::Float32: {
SharedMem<JS_VOLATILE_ARM float*> src = data.cast<JS_VOLATILE_ARM float*>();
for (uint32_t i = 0; i < count; ++i)
Ops::store(dest++, ConvertNumber<T>(Ops::load(src++)));
break;
}
case Scalar::Float64: {
SharedMem<JS_VOLATILE_ARM double*> src = data.cast<JS_VOLATILE_ARM double*>();
for (uint32_t i = 0; i < count; ++i)
Ops::store(dest++, ConvertNumber<T>(Ops::load(src++)));
break;
}
default:
MOZ_CRASH("setFromTypedArray with a typed array with bogus type");
}
#undef JS_VOLATILE_ARM
return true;
}
/*
* Copy |source[0]| to |source[len]| (exclusive) elements into the typed
* array |target|, starting at index |offset|. |source| must not be a
* typed array.
*/
static bool
setFromNonTypedArray(JSContext* cx, Handle<SomeTypedArray*> target, HandleObject source,
uint32_t len, uint32_t offset = 0)
{
MOZ_ASSERT(target->type() == SpecificArray::ArrayTypeID(),
"target type and NativeType must match");
MOZ_ASSERT(!source->is<TypedArrayObject>(),
"use setFromTypedArray instead of this method");
uint32_t i = 0;
if (source->isNative()) {
// Attempt fast-path infallible conversion of dense elements up to
// the first potentially side-effectful lookup or conversion.
uint32_t bound = Min(source->as<NativeObject>().getDenseInitializedLength(), len);
SharedMem<T*> dest =
target->template as<TypedArrayObject>().viewDataEither().template cast<T*>() + offset;
MOZ_ASSERT(!canConvertInfallibly(MagicValue(JS_ELEMENTS_HOLE)),
"the following loop must abort on holes");
const Value* srcValues = source->as<NativeObject>().getDenseElements();
for (; i < bound; i++) {
if (!canConvertInfallibly(srcValues[i]))
break;
Ops::store(dest + i, infallibleValueToNative(srcValues[i]));
}
if (i == len)
return true;
}
// Convert and copy any remaining elements generically.
RootedValue v(cx);
for (; i < len; i++) {
if (!GetElement(cx, source, source, i, &v))
return false;
T n;
if (!valueToNative(cx, v, &n))
return false;
len = Min(len, target->length());
if (i >= len)
break;
// Compute every iteration in case getElement/valueToNative is wacky.
SharedMem<T*> dest =
target->template as<TypedArrayObject>().viewDataEither().template cast<T*>() +
offset + i;
Ops::store(dest, n);
}
return true;
}
/*
* Copy |source| into the typed array |target|.
*/
static bool
initFromIterablePackedArray(JSContext* cx, Handle<SomeTypedArray*> target,
HandleArrayObject source)
{
MOZ_ASSERT(target->type() == SpecificArray::ArrayTypeID(),
"target type and NativeType must match");
MOZ_ASSERT(IsPackedArray(source), "source array must be packed");
MOZ_ASSERT(source->getDenseInitializedLength() <= target->length());
uint32_t len = source->getDenseInitializedLength();
uint32_t i = 0;
// Attempt fast-path infallible conversion of dense elements up to the
// first potentially side-effectful conversion.
SharedMem<T*> dest =
target->template as<TypedArrayObject>().viewDataEither().template cast<T*>();
const Value* srcValues = source->getDenseElements();
for (; i < len; i++) {
if (!canConvertInfallibly(srcValues[i]))
break;
Ops::store(dest + i, infallibleValueToNative(srcValues[i]));
}
if (i == len)
return true;
// Convert any remaining elements by first collecting them into a
// temporary list, and then copying them into the typed array.
AutoValueVector values(cx);
if (!values.append(srcValues + i, len - i))
return false;
RootedValue v(cx);
for (uint32_t j = 0; j < values.length(); i++, j++) {
v = values[j];
T n;
if (!valueToNative(cx, v, &n))
return false;
// |target| is a newly allocated typed array and not yet visible to
// content script, so valueToNative can't detach the underlying
// buffer.
MOZ_ASSERT(i < target->length());
// Compute every iteration in case GC moves the data.
SharedMem<T*> newDest =
target->template as<TypedArrayObject>().viewDataEither().template cast<T*>();
Ops::store(newDest + i, n);
}
return true;
}
private:
static bool
setFromOverlappingTypedArray(JSContext* cx,
Handle<SomeTypedArray*> target,
Handle<SomeTypedArray*> source,
uint32_t offset)
{
MOZ_ASSERT(SpecificArray::ArrayTypeID() == target->type(),
"calling wrong setFromTypedArray specialization");
MOZ_ASSERT(SomeTypedArray::sameBuffer(target, source),
"the provided arrays don't actually overlap, so it's "
"undesirable to use this method");
MOZ_ASSERT(offset <= target->length());
MOZ_ASSERT(source->length() <= target->length() - offset);
SharedMem<T*> dest =
target->template as<TypedArrayObject>().viewDataEither().template cast<T*>() + offset;
uint32_t len = source->length();
if (source->type() == target->type()) {
SharedMem<T*> src =
source->template as<TypedArrayObject>().viewDataEither().template cast<T*>();
Ops::podMove(dest, src, len);
return true;
}
// Copy |source| in case it overlaps the target elements being set.
size_t sourceByteLen = len * source->bytesPerElement();
void* data = target->zone()->template pod_malloc<uint8_t>(sourceByteLen);
if (!data)
return false;
Ops::memcpy(SharedMem<void*>::unshared(data),
source->template as<TypedArrayObject>().viewDataEither(),
sourceByteLen);
switch (source->type()) {
case Scalar::Int8: {
int8_t* src = static_cast<int8_t*>(data);
for (uint32_t i = 0; i < len; ++i)
Ops::store(dest++, ConvertNumber<T>(*src++));
break;
}
case Scalar::Uint8:
case Scalar::Uint8Clamped: {
uint8_t* src = static_cast<uint8_t*>(data);
for (uint32_t i = 0; i < len; ++i)
Ops::store(dest++, ConvertNumber<T>(*src++));
break;
}
case Scalar::Int16: {
int16_t* src = static_cast<int16_t*>(data);
for (uint32_t i = 0; i < len; ++i)
Ops::store(dest++, ConvertNumber<T>(*src++));
break;
}
case Scalar::Uint16: {
uint16_t* src = static_cast<uint16_t*>(data);
for (uint32_t i = 0; i < len; ++i)
Ops::store(dest++, ConvertNumber<T>(*src++));
break;
}
case Scalar::Int32: {
int32_t* src = static_cast<int32_t*>(data);
for (uint32_t i = 0; i < len; ++i)
Ops::store(dest++, ConvertNumber<T>(*src++));
break;
}
case Scalar::Uint32: {
uint32_t* src = static_cast<uint32_t*>(data);
for (uint32_t i = 0; i < len; ++i)
Ops::store(dest++, ConvertNumber<T>(*src++));
break;
}
case Scalar::Float32: {
float* src = static_cast<float*>(data);
for (uint32_t i = 0; i < len; ++i)
Ops::store(dest++, ConvertNumber<T>(*src++));
break;
}
case Scalar::Float64: {
double* src = static_cast<double*>(data);
for (uint32_t i = 0; i < len; ++i)
Ops::store(dest++, ConvertNumber<T>(*src++));
break;
}
default:
MOZ_CRASH("setFromOverlappingTypedArray with a typed array with bogus type");
}
js_free(data);
return true;
}
static bool
canConvertInfallibly(const Value& v)
{
return v.isNumber() || v.isBoolean() || v.isNull() || v.isUndefined();
}
static T
infallibleValueToNative(const Value& v)
{
if (v.isInt32())
return T(v.toInt32());
if (v.isDouble())
return doubleToNative(v.toDouble());
if (v.isBoolean())
return T(v.toBoolean());
if (v.isNull())
return T(0);
MOZ_ASSERT(v.isUndefined());
return TypeIsFloatingPoint<T>() ? T(JS::GenericNaN()) : T(0);
}
static bool
valueToNative(JSContext* cx, HandleValue v, T* result)
{
MOZ_ASSERT(!v.isMagic());
if (MOZ_LIKELY(canConvertInfallibly(v))) {
*result = infallibleValueToNative(v);
return true;
}
double d;
MOZ_ASSERT(v.isString() || v.isObject() || v.isSymbol());
if (!(v.isString() ? StringToNumber(cx, v.toString(), &d) : ToNumber(cx, v, &d)))
return false;
*result = doubleToNative(d);
return true;
}
static T
doubleToNative(double d)
{
if (TypeIsFloatingPoint<T>()) {
#ifdef JS_MORE_DETERMINISTIC
// The JS spec doesn't distinguish among different NaN values, and
// it deliberately doesn't specify the bit pattern written to a
// typed array when NaN is written into it. This bit-pattern
// inconsistency could confuse deterministic testing, so always
// canonicalize NaN values in more-deterministic builds.
d = JS::CanonicalizeNaN(d);
#endif
return T(d);
}
if (MOZ_UNLIKELY(mozilla::IsNaN(d)))
return T(0);
if (SpecificArray::ArrayTypeID() == Scalar::Uint8Clamped)
return T(d);
if (TypeIsUnsigned<T>())
return T(JS::ToUint32(d));
return T(JS::ToInt32(d));
}
};
template<typename SomeTypedArray>
class TypedArrayMethods
{
static_assert(mozilla::IsSame<SomeTypedArray, TypedArrayObject>::value,
"methods must be shared/unshared-specific, not "
"element-type-specific");
typedef typename SomeTypedArray::BufferType BufferType;
typedef typename SomeTypedArray::template OfType<int8_t>::Type Int8ArrayType;
typedef typename SomeTypedArray::template OfType<uint8_t>::Type Uint8ArrayType;
typedef typename SomeTypedArray::template OfType<int16_t>::Type Int16ArrayType;
typedef typename SomeTypedArray::template OfType<uint16_t>::Type Uint16ArrayType;
typedef typename SomeTypedArray::template OfType<int32_t>::Type Int32ArrayType;
typedef typename SomeTypedArray::template OfType<uint32_t>::Type Uint32ArrayType;
typedef typename SomeTypedArray::template OfType<float>::Type Float32ArrayType;
typedef typename SomeTypedArray::template OfType<double>::Type Float64ArrayType;
typedef typename SomeTypedArray::template OfType<uint8_clamped>::Type Uint8ClampedArrayType;
public:
/* set(array[, offset]) */
static bool
set(JSContext* cx, const CallArgs& args)
{
MOZ_ASSERT(SomeTypedArray::is(args.thisv()));
Rooted<SomeTypedArray*> target(cx, &args.thisv().toObject().as<SomeTypedArray>());
// The first argument must be either a typed array or arraylike.
if (args.length() == 0 || !args[0].isObject()) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
return false;
}
int32_t offset = 0;
if (args.length() > 1) {
if (!ToInt32(cx, args[1], &offset))
return false;
if (offset < 0 || uint32_t(offset) > target->length()) {
// the given offset is bogus
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_BAD_INDEX);
return false;
}
}
RootedObject arg0(cx, &args[0].toObject());
if (arg0->is<TypedArrayObject>()) {
if (arg0->as<TypedArrayObject>().length() > target->length() - offset) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_BAD_ARRAY_LENGTH);
return false;
}
if (!setFromTypedArray(cx, target, arg0, offset))
return false;
} else {
uint32_t len;
if (!GetLengthProperty(cx, arg0, &len))
return false;
if (uint32_t(offset) > target->length() || len > target->length() - offset) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_BAD_ARRAY_LENGTH);
return false;
}
if (!setFromNonTypedArray(cx, target, arg0, len, offset))
return false;
}
args.rval().setUndefined();
return true;
}
static bool
setFromTypedArray(JSContext* cx, Handle<SomeTypedArray*> target, HandleObject source,
uint32_t offset = 0)
{
MOZ_ASSERT(source->is<TypedArrayObject>(), "use setFromNonTypedArray");
bool isShared = target->isSharedMemory() || source->as<TypedArrayObject>().isSharedMemory();
switch (target->type()) {
case Scalar::Int8:
if (isShared)
return ElementSpecific<Int8ArrayType, SharedOps>::setFromTypedArray(cx, target, source, offset);
return ElementSpecific<Int8ArrayType, UnsharedOps>::setFromTypedArray(cx, target, source, offset);
case Scalar::Uint8:
if (isShared)
return ElementSpecific<Uint8ArrayType, SharedOps>::setFromTypedArray(cx, target, source, offset);
return ElementSpecific<Uint8ArrayType, UnsharedOps>::setFromTypedArray(cx, target, source, offset);
case Scalar::Int16:
if (isShared)
return ElementSpecific<Int16ArrayType, SharedOps>::setFromTypedArray(cx, target, source, offset);
return ElementSpecific<Int16ArrayType, UnsharedOps>::setFromTypedArray(cx, target, source, offset);
case Scalar::Uint16:
if (isShared)
return ElementSpecific<Uint16ArrayType, SharedOps>::setFromTypedArray(cx, target, source, offset);
return ElementSpecific<Uint16ArrayType, UnsharedOps>::setFromTypedArray(cx, target, source, offset);
case Scalar::Int32:
if (isShared)
return ElementSpecific<Int32ArrayType, SharedOps>::setFromTypedArray(cx, target, source, offset);
return ElementSpecific<Int32ArrayType, UnsharedOps>::setFromTypedArray(cx, target, source, offset);
case Scalar::Uint32:
if (isShared)
return ElementSpecific<Uint32ArrayType, SharedOps>::setFromTypedArray(cx, target, source, offset);
return ElementSpecific<Uint32ArrayType, UnsharedOps>::setFromTypedArray(cx, target, source, offset);
case Scalar::Float32:
if (isShared)
return ElementSpecific<Float32ArrayType, SharedOps>::setFromTypedArray(cx, target, source, offset);
return ElementSpecific<Float32ArrayType, UnsharedOps>::setFromTypedArray(cx, target, source, offset);
case Scalar::Float64:
if (isShared)
return ElementSpecific<Float64ArrayType, SharedOps>::setFromTypedArray(cx, target, source, offset);
return ElementSpecific<Float64ArrayType, UnsharedOps>::setFromTypedArray(cx, target, source, offset);
case Scalar::Uint8Clamped:
if (isShared)
return ElementSpecific<Uint8ClampedArrayType, SharedOps>::setFromTypedArray(cx, target, source, offset);
return ElementSpecific<Uint8ClampedArrayType, UnsharedOps>::setFromTypedArray(cx, target, source, offset);
case Scalar::Int64:
case Scalar::Float32x4:
case Scalar::Int8x16:
case Scalar::Int16x8:
case Scalar::Int32x4:
case Scalar::MaxTypedArrayViewType:
break;
}
MOZ_CRASH("nonsense target element type");
}
static bool
setFromNonTypedArray(JSContext* cx, Handle<SomeTypedArray*> target, HandleObject source,
uint32_t len, uint32_t offset = 0)
{
MOZ_ASSERT(!source->is<TypedArrayObject>(), "use setFromTypedArray");
bool isShared = target->isSharedMemory();
switch (target->type()) {
case Scalar::Int8:
if (isShared)
return ElementSpecific<Int8ArrayType, SharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
return ElementSpecific<Int8ArrayType, UnsharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
case Scalar::Uint8:
if (isShared)
return ElementSpecific<Uint8ArrayType, SharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
return ElementSpecific<Uint8ArrayType, UnsharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
case Scalar::Int16:
if (isShared)
return ElementSpecific<Int16ArrayType, SharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
return ElementSpecific<Int16ArrayType, UnsharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
case Scalar::Uint16:
if (isShared)
return ElementSpecific<Uint16ArrayType, SharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
return ElementSpecific<Uint16ArrayType, UnsharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
case Scalar::Int32:
if (isShared)
return ElementSpecific<Int32ArrayType, SharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
return ElementSpecific<Int32ArrayType, UnsharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
case Scalar::Uint32:
if (isShared)
return ElementSpecific<Uint32ArrayType, SharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
return ElementSpecific<Uint32ArrayType, UnsharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
case Scalar::Float32:
if (isShared)
return ElementSpecific<Float32ArrayType, SharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
return ElementSpecific<Float32ArrayType, UnsharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
case Scalar::Float64:
if (isShared)
return ElementSpecific<Float64ArrayType, SharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
return ElementSpecific<Float64ArrayType, UnsharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
case Scalar::Uint8Clamped:
if (isShared)
return ElementSpecific<Uint8ClampedArrayType, SharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
return ElementSpecific<Uint8ClampedArrayType, UnsharedOps>::setFromNonTypedArray(cx, target, source, len, offset);
case Scalar::Int64:
case Scalar::Float32x4:
case Scalar::Int8x16:
case Scalar::Int16x8:
case Scalar::Int32x4:
case Scalar::MaxTypedArrayViewType:
break;
}
MOZ_CRASH("bad target array type");
}
static bool
initFromIterablePackedArray(JSContext* cx, Handle<SomeTypedArray*> target,
HandleArrayObject source)
{
bool isShared = target->isSharedMemory();
switch (target->type()) {
case Scalar::Int8:
if (isShared)
return ElementSpecific<Int8ArrayType, SharedOps>::initFromIterablePackedArray(cx, target, source);
return ElementSpecific<Int8ArrayType, UnsharedOps>::initFromIterablePackedArray(cx, target, source);
case Scalar::Uint8:
if (isShared)
return ElementSpecific<Uint8ArrayType, SharedOps>::initFromIterablePackedArray(cx, target, source);
return ElementSpecific<Uint8ArrayType, UnsharedOps>::initFromIterablePackedArray(cx, target, source);
case Scalar::Int16:
if (isShared)
return ElementSpecific<Int16ArrayType, SharedOps>::initFromIterablePackedArray(cx, target, source);
return ElementSpecific<Int16ArrayType, UnsharedOps>::initFromIterablePackedArray(cx, target, source);
case Scalar::Uint16:
if (isShared)
return ElementSpecific<Uint16ArrayType, SharedOps>::initFromIterablePackedArray(cx, target, source);
return ElementSpecific<Uint16ArrayType, UnsharedOps>::initFromIterablePackedArray(cx, target, source);
case Scalar::Int32:
if (isShared)
return ElementSpecific<Int32ArrayType, SharedOps>::initFromIterablePackedArray(cx, target, source);
return ElementSpecific<Int32ArrayType, UnsharedOps>::initFromIterablePackedArray(cx, target, source);
case Scalar::Uint32:
if (isShared)
return ElementSpecific<Uint32ArrayType, SharedOps>::initFromIterablePackedArray(cx, target, source);
return ElementSpecific<Uint32ArrayType, UnsharedOps>::initFromIterablePackedArray(cx, target, source);
case Scalar::Float32:
if (isShared)
return ElementSpecific<Float32ArrayType, SharedOps>::initFromIterablePackedArray(cx, target, source);
return ElementSpecific<Float32ArrayType, UnsharedOps>::initFromIterablePackedArray(cx, target, source);
case Scalar::Float64:
if (isShared)
return ElementSpecific<Float64ArrayType, SharedOps>::initFromIterablePackedArray(cx, target, source);
return ElementSpecific<Float64ArrayType, UnsharedOps>::initFromIterablePackedArray(cx, target, source);
case Scalar::Uint8Clamped:
if (isShared)
return ElementSpecific<Uint8ClampedArrayType, SharedOps>::initFromIterablePackedArray(cx, target, source);
return ElementSpecific<Uint8ClampedArrayType, UnsharedOps>::initFromIterablePackedArray(cx, target, source);
case Scalar::Int64:
case Scalar::Float32x4:
case Scalar::Int8x16:
case Scalar::Int16x8:
case Scalar::Int32x4:
case Scalar::MaxTypedArrayViewType:
break;
}
MOZ_CRASH("bad target array type");
}
};
} // namespace js
#endif // vm_TypedArrayCommon_h
