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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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
/*
* JS math package.
*/
#include "jsmath.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/RandomNum.h"
#include "mozilla/WrappingOperations.h"
#include <cmath>
#include "fdlibm.h"
#include "jsapi.h"
#include "jstypes.h"
#include "jit/InlinableNatives.h"
#include "js/Class.h"
#include "js/Prefs.h"
#include "js/PropertySpec.h"
#include "util/DifferentialTesting.h"
#include "vm/JSContext.h"
#include "vm/Realm.h"
#include "vm/Time.h"
#include "vm/JSObject-inl.h"
using namespace js;
using JS::GenericNaN;
using JS::ToNumber;
using mozilla::ExponentComponent;
using mozilla::FloatingPoint;
using mozilla::IsNegative;
using mozilla::IsNegativeZero;
using mozilla::Maybe;
using mozilla::NegativeInfinity;
using mozilla::NumberEqualsInt32;
using mozilla::NumberEqualsInt64;
using mozilla::PositiveInfinity;
using mozilla::WrappingMultiply;
bool js::math_use_fdlibm_for_sin_cos_tan() {
return JS::Prefs::use_fdlibm_for_sin_cos_tan();
}
static inline bool UseFdlibmForSinCosTan(const CallArgs& args) {
return math_use_fdlibm_for_sin_cos_tan() ||
args.callee().nonCCWRealm()->creationOptions().alwaysUseFdlibm();
}
template <UnaryMathFunctionType F>
static bool math_function(JSContext* cx, CallArgs& args) {
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x)) {
return false;
}
// TODO(post-Warp): Re-evaluate if it's still necessary resp. useful to always
// type the value as a double.
// NB: Always stored as a double so the math function can be inlined
// through MMathFunction.
double z = F(x);
args.rval().setDouble(z);
return true;
}
double js::math_abs_impl(double x) { return mozilla::Abs(x); }
bool js::math_abs(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x)) {
return false;
}
args.rval().setNumber(math_abs_impl(x));
return true;
}
double js::math_acos_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_acos(x);
}
static bool math_acos(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_acos_impl>(cx, args);
}
double js::math_asin_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_asin(x);
}
static bool math_asin(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_asin_impl>(cx, args);
}
double js::math_atan_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_atan(x);
}
static bool math_atan(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_atan_impl>(cx, args);
}
double js::ecmaAtan2(double y, double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_atan2(y, x);
}
static bool math_atan2(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
double y;
if (!ToNumber(cx, args.get(0), &y)) {
return false;
}
double x;
if (!ToNumber(cx, args.get(1), &x)) {
return false;
}
double z = ecmaAtan2(y, x);
args.rval().setDouble(z);
return true;
}
double js::math_ceil_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_ceil(x);
}
static bool math_ceil(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x)) {
return false;
}
args.rval().setNumber(math_ceil_impl(x));
return true;
}
static bool math_clz32(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setInt32(32);
return true;
}
uint32_t n;
if (!ToUint32(cx, args[0], &n)) {
return false;
}
if (n == 0) {
args.rval().setInt32(32);
return true;
}
args.rval().setInt32(mozilla::CountLeadingZeroes32(n));
return true;
}
double js::math_cos_fdlibm_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_cos(x);
}
double js::math_cos_native_impl(double x) {
MOZ_ASSERT(!math_use_fdlibm_for_sin_cos_tan());
AutoUnsafeCallWithABI unsafe;
return std::cos(x);
}
static bool math_cos(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (UseFdlibmForSinCosTan(args)) {
return math_function<math_cos_fdlibm_impl>(cx, args);
}
return math_function<math_cos_native_impl>(cx, args);
}
double js::math_exp_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_exp(x);
}
static bool math_exp(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_exp_impl>(cx, args);
}
double js::math_floor_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_floor(x);
}
bool js::math_floor(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x)) {
return false;
}
args.rval().setNumber(math_floor_impl(x));
return true;
}
bool js::math_imul_handle(JSContext* cx, HandleValue lhs, HandleValue rhs,
MutableHandleValue res) {
int32_t a = 0, b = 0;
if (!lhs.isUndefined() && !ToInt32(cx, lhs, &a)) {
return false;
}
if (!rhs.isUndefined() && !ToInt32(cx, rhs, &b)) {
return false;
}
res.setInt32(WrappingMultiply(a, b));
return true;
}
static bool math_imul(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_imul_handle(cx, args.get(0), args.get(1), args.rval());
}
// Implements Math.fround (20.2.2.16) up to step 3
bool js::RoundFloat32(JSContext* cx, HandleValue v, float* out) {
double d;
bool success = ToNumber(cx, v, &d);
*out = static_cast<float>(d);
return success;
}
bool js::RoundFloat32(JSContext* cx, HandleValue arg, MutableHandleValue res) {
float f;
if (!RoundFloat32(cx, arg, &f)) {
return false;
}
res.setDouble(static_cast<double>(f));
return true;
}
double js::RoundFloat32(double d) {
return static_cast<double>(static_cast<float>(d));
}
static bool math_fround(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
return RoundFloat32(cx, args[0], args.rval());
}
double js::math_log_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_log(x);
}
static bool math_log(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_log_impl>(cx, args);
}
double js::math_max_impl(double x, double y) {
AutoUnsafeCallWithABI unsafe;
// Math.max(num, NaN) => NaN, Math.max(-0, +0) => +0
if (x > y || std::isnan(x) || (x == y && IsNegative(y))) {
return x;
}
return y;
}
bool js::math_max(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
double maxval = NegativeInfinity<double>();
for (unsigned i = 0; i < args.length(); i++) {
double x;
if (!ToNumber(cx, args[i], &x)) {
return false;
}
maxval = math_max_impl(x, maxval);
}
args.rval().setNumber(maxval);
return true;
}
double js::math_min_impl(double x, double y) {
AutoUnsafeCallWithABI unsafe;
// Math.min(num, NaN) => NaN, Math.min(-0, +0) => -0
if (x < y || std::isnan(x) || (x == y && IsNegativeZero(x))) {
return x;
}
return y;
}
bool js::math_min(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
double minval = PositiveInfinity<double>();
for (unsigned i = 0; i < args.length(); i++) {
double x;
if (!ToNumber(cx, args[i], &x)) {
return false;
}
minval = math_min_impl(x, minval);
}
args.rval().setNumber(minval);
return true;
}
double js::powi(double x, int32_t y) {
AutoUnsafeCallWithABI unsafe;
// It's only safe to optimize this when we can compute with integer values or
// the exponent is a small, positive constant.
if (y >= 0) {
uint32_t n = uint32_t(y);
// NB: Have to take fast-path for n <= 4 to match |MPow::foldsTo|. Otherwise
// we risk causing differential testing issues.
if (n == 0) {
return 1;
}
if (n == 1) {
return x;
}
if (n == 2) {
return x * x;
}
if (n == 3) {
return x * x * x;
}
if (n == 4) {
double z = x * x;
return z * z;
}
int64_t i;
if (NumberEqualsInt64(x, &i)) {
// Special-case: |-0 ** odd| is -0.
if (i == 0) {
return (n & 1) ? x : 0;
}
// Use int64 to cover cases like |Math.pow(2, 53)|.
mozilla::CheckedInt64 runningSquare = i;
mozilla::CheckedInt64 result = 1;
while (true) {
if ((n & 1) != 0) {
result *= runningSquare;
if (!result.isValid()) {
break;
}
}
n >>= 1;
if (n == 0) {
return static_cast<double>(result.value());
}
runningSquare *= runningSquare;
if (!runningSquare.isValid()) {
break;
}
}
}
// Fall-back to use std::pow to reduce floating point precision errors.
}
return std::pow(x, static_cast<double>(y)); // Avoid pow(double, int).
}
double js::ecmaPow(double x, double y) {
AutoUnsafeCallWithABI unsafe;
/*
* Use powi if the exponent is an integer-valued double. We don't have to
* check for NaN since a comparison with NaN is always false.
*/
int32_t yi;
if (NumberEqualsInt32(y, &yi)) {
return powi(x, yi);
}
/*
* Because C99 and ECMA specify different behavior for pow(),
* we need to wrap the libm call to make it ECMA compliant.
*/
if (!std::isfinite(y) && (x == 1.0 || x == -1.0)) {
return GenericNaN();
}
/* pow(x, +-0) is always 1, even for x = NaN (MSVC gets this wrong). */
if (y == 0) {
return 1;
}
/*
* Special case for square roots. Note that pow(x, 0.5) != sqrt(x)
* when x = -0.0, so we have to guard for this.
*/
if (std::isfinite(x) && x != 0.0) {
if (y == 0.5) {
return std::sqrt(x);
}
if (y == -0.5) {
return 1.0 / std::sqrt(x);
}
}
return std::pow(x, y);
}
static bool math_pow(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
double x;
if (!ToNumber(cx, args.get(0), &x)) {
return false;
}
double y;
if (!ToNumber(cx, args.get(1), &y)) {
return false;
}
double z = ecmaPow(x, y);
args.rval().setNumber(z);
return true;
}
uint64_t js::GenerateRandomSeed() {
Maybe<uint64_t> maybeSeed = mozilla::RandomUint64();
return maybeSeed.valueOrFrom([] {
// Use PRMJ_Now() in case we couldn't read random bits from the OS.
uint64_t timestamp = PRMJ_Now();
return timestamp ^ (timestamp << 32);
});
}
void js::GenerateXorShift128PlusSeed(mozilla::Array<uint64_t, 2>& seed) {
// XorShift128PlusRNG must be initialized with a non-zero seed.
do {
seed[0] = GenerateRandomSeed();
seed[1] = GenerateRandomSeed();
} while (seed[0] == 0 && seed[1] == 0);
}
mozilla::non_crypto::XorShift128PlusRNG&
Realm::getOrCreateRandomNumberGenerator() {
if (randomNumberGenerator_.isNothing()) {
mozilla::Array<uint64_t, 2> seed;
GenerateXorShift128PlusSeed(seed);
randomNumberGenerator_.emplace(seed[0], seed[1]);
}
return randomNumberGenerator_.ref();
}
double js::math_random_impl(JSContext* cx) {
return cx->realm()->getOrCreateRandomNumberGenerator().nextDouble();
}
static bool math_random(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (js::SupportDifferentialTesting()) {
args.rval().setDouble(0);
} else {
args.rval().setDouble(math_random_impl(cx));
}
return true;
}
template <typename T>
T js::GetBiggestNumberLessThan(T x) {
MOZ_ASSERT(!IsNegative(x));
MOZ_ASSERT(std::isfinite(x));
using Bits = typename mozilla::FloatingPoint<T>::Bits;
Bits bits = mozilla::BitwiseCast<Bits>(x);
MOZ_ASSERT(bits > 0, "will underflow");
return mozilla::BitwiseCast<T>(bits - 1);
}
template double js::GetBiggestNumberLessThan<>(double x);
template float js::GetBiggestNumberLessThan<>(float x);
double js::math_round_impl(double x) {
AutoUnsafeCallWithABI unsafe;
int32_t ignored;
if (NumberEqualsInt32(x, &ignored)) {
return x;
}
/* Some numbers are so big that adding 0.5 would give the wrong number. */
if (ExponentComponent(x) >=
int_fast16_t(FloatingPoint<double>::kExponentShift)) {
return x;
}
double add = (x >= 0) ? GetBiggestNumberLessThan(0.5) : 0.5;
return std::copysign(fdlibm_floor(x + add), x);
}
float js::math_roundf_impl(float x) {
AutoUnsafeCallWithABI unsafe;
int32_t ignored;
if (NumberEqualsInt32(x, &ignored)) {
return x;
}
/* Some numbers are so big that adding 0.5 would give the wrong number. */
if (ExponentComponent(x) >=
int_fast16_t(FloatingPoint<float>::kExponentShift)) {
return x;
}
float add = (x >= 0) ? GetBiggestNumberLessThan(0.5f) : 0.5f;
return std::copysign(fdlibm_floorf(x + add), x);
}
/* ES5 15.8.2.15. */
static bool math_round(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x)) {
return false;
}
args.rval().setNumber(math_round_impl(x));
return true;
}
double js::math_sin_fdlibm_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_sin(x);
}
double js::math_sin_native_impl(double x) {
MOZ_ASSERT(!math_use_fdlibm_for_sin_cos_tan());
AutoUnsafeCallWithABI unsafe;
return std::sin(x);
}
static bool math_sin(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (UseFdlibmForSinCosTan(args)) {
return math_function<math_sin_fdlibm_impl>(cx, args);
}
return math_function<math_sin_native_impl>(cx, args);
}
double js::math_sqrt_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return std::sqrt(x);
}
static bool math_sqrt(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_sqrt_impl>(cx, args);
}
double js::math_tan_fdlibm_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_tan(x);
}
double js::math_tan_native_impl(double x) {
MOZ_ASSERT(!math_use_fdlibm_for_sin_cos_tan());
AutoUnsafeCallWithABI unsafe;
return std::tan(x);
}
static bool math_tan(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (UseFdlibmForSinCosTan(args)) {
return math_function<math_tan_fdlibm_impl>(cx, args);
}
return math_function<math_tan_native_impl>(cx, args);
}
double js::math_log10_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_log10(x);
}
static bool math_log10(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_log10_impl>(cx, args);
}
double js::math_log2_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_log2(x);
}
static bool math_log2(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_log2_impl>(cx, args);
}
double js::math_log1p_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_log1p(x);
}
static bool math_log1p(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_log1p_impl>(cx, args);
}
double js::math_expm1_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_expm1(x);
}
static bool math_expm1(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_expm1_impl>(cx, args);
}
double js::math_cosh_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_cosh(x);
}
static bool math_cosh(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_cosh_impl>(cx, args);
}
double js::math_sinh_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_sinh(x);
}
static bool math_sinh(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_sinh_impl>(cx, args);
}
double js::math_tanh_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_tanh(x);
}
static bool math_tanh(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_tanh_impl>(cx, args);
}
double js::math_acosh_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_acosh(x);
}
static bool math_acosh(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_acosh_impl>(cx, args);
}
double js::math_asinh_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_asinh(x);
}
static bool math_asinh(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_asinh_impl>(cx, args);
}
double js::math_atanh_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_atanh(x);
}
static bool math_atanh(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_atanh_impl>(cx, args);
}
double js::ecmaHypot(double x, double y) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_hypot(x, y);
}
static inline void hypot_step(double& scale, double& sumsq, double x) {
double xabs = mozilla::Abs(x);
if (scale < xabs) {
sumsq = 1 + sumsq * (scale / xabs) * (scale / xabs);
scale = xabs;
} else if (scale != 0) {
sumsq += (xabs / scale) * (xabs / scale);
}
}
double js::hypot4(double x, double y, double z, double w) {
AutoUnsafeCallWithABI unsafe;
// Check for infinities or NaNs so that we can return immediately.
if (std::isinf(x) || std::isinf(y) || std::isinf(z) || std::isinf(w)) {
return mozilla::PositiveInfinity<double>();
}
if (std::isnan(x) || std::isnan(y) || std::isnan(z) || std::isnan(w)) {
return GenericNaN();
}
double scale = 0;
double sumsq = 1;
hypot_step(scale, sumsq, x);
hypot_step(scale, sumsq, y);
hypot_step(scale, sumsq, z);
hypot_step(scale, sumsq, w);
return scale * std::sqrt(sumsq);
}
double js::hypot3(double x, double y, double z) {
AutoUnsafeCallWithABI unsafe;
return hypot4(x, y, z, 0.0);
}
static bool math_hypot(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_hypot_handle(cx, args, args.rval());
}
bool js::math_hypot_handle(JSContext* cx, HandleValueArray args,
MutableHandleValue res) {
// IonMonkey calls the ecmaHypot function directly if two arguments are
// given. Do that here as well to get the same results.
if (args.length() == 2) {
double x, y;
if (!ToNumber(cx, args[0], &x)) {
return false;
}
if (!ToNumber(cx, args[1], &y)) {
return false;
}
double result = ecmaHypot(x, y);
res.setDouble(result);
return true;
}
bool isInfinite = false;
bool isNaN = false;
double scale = 0;
double sumsq = 1;
for (unsigned i = 0; i < args.length(); i++) {
double x;
if (!ToNumber(cx, args[i], &x)) {
return false;
}
isInfinite |= std::isinf(x);
isNaN |= std::isnan(x);
if (isInfinite || isNaN) {
continue;
}
hypot_step(scale, sumsq, x);
}
double result = isInfinite ? PositiveInfinity<double>()
: isNaN ? GenericNaN()
: scale * std::sqrt(sumsq);
res.setDouble(result);
return true;
}
double js::math_trunc_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_trunc(x);
}
float js::math_truncf_impl(float x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_truncf(x);
}
bool js::math_trunc(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x)) {
return false;
}
args.rval().setNumber(math_trunc_impl(x));
return true;
}
double js::math_sign_impl(double x) {
AutoUnsafeCallWithABI unsafe;
if (std::isnan(x)) {
return GenericNaN();
}
return x == 0 ? x : x < 0 ? -1 : 1;
}
static bool math_sign(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
args.rval().setNaN();
return true;
}
double x;
if (!ToNumber(cx, args[0], &x)) {
return false;
}
args.rval().setNumber(math_sign_impl(x));
return true;
}
double js::math_cbrt_impl(double x) {
AutoUnsafeCallWithABI unsafe;
return fdlibm_cbrt(x);
}
static bool math_cbrt(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return math_function<math_cbrt_impl>(cx, args);
}
static bool math_toSource(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setString(cx->names().Math);
return true;
}
UnaryMathFunctionType js::GetUnaryMathFunctionPtr(UnaryMathFunction fun) {
switch (fun) {
case UnaryMathFunction::SinNative:
return math_sin_native_impl;
case UnaryMathFunction::SinFdlibm:
return math_sin_fdlibm_impl;
case UnaryMathFunction::CosNative:
return math_cos_native_impl;
case UnaryMathFunction::CosFdlibm:
return math_cos_fdlibm_impl;
case UnaryMathFunction::TanNative:
return math_tan_native_impl;
case UnaryMathFunction::TanFdlibm:
return math_tan_fdlibm_impl;
case UnaryMathFunction::Log:
return math_log_impl;
case UnaryMathFunction::Exp:
return math_exp_impl;
case UnaryMathFunction::ATan:
return math_atan_impl;
case UnaryMathFunction::ASin:
return math_asin_impl;
case UnaryMathFunction::ACos:
return math_acos_impl;
case UnaryMathFunction::Log10:
return math_log10_impl;
case UnaryMathFunction::Log2:
return math_log2_impl;
case UnaryMathFunction::Log1P:
return math_log1p_impl;
case UnaryMathFunction::ExpM1:
return math_expm1_impl;
case UnaryMathFunction::CosH:
return math_cosh_impl;
case UnaryMathFunction::SinH:
return math_sinh_impl;
case UnaryMathFunction::TanH:
return math_tanh_impl;
case UnaryMathFunction::ACosH:
return math_acosh_impl;
case UnaryMathFunction::ASinH:
return math_asinh_impl;
case UnaryMathFunction::ATanH:
return math_atanh_impl;
case UnaryMathFunction::Trunc:
return math_trunc_impl;
case UnaryMathFunction::Cbrt:
return math_cbrt_impl;
case UnaryMathFunction::Floor:
return math_floor_impl;
case UnaryMathFunction::Ceil:
return math_ceil_impl;
case UnaryMathFunction::Round:
return math_round_impl;
}
MOZ_CRASH("Unknown function");
}
const char* js::GetUnaryMathFunctionName(UnaryMathFunction fun) {
switch (fun) {
case UnaryMathFunction::SinNative:
return "Sin (native)";
case UnaryMathFunction::SinFdlibm:
return "Sin (fdlibm)";
case UnaryMathFunction::CosNative:
return "Cos (native)";
case UnaryMathFunction::CosFdlibm:
return "Cos (fdlibm)";
case UnaryMathFunction::TanNative:
return "Tan (native)";
case UnaryMathFunction::TanFdlibm:
return "Tan (fdlibm)";
case UnaryMathFunction::Log:
return "Log";
case UnaryMathFunction::Exp:
return "Exp";
case UnaryMathFunction::ACos:
return "ACos";
case UnaryMathFunction::ASin:
return "ASin";
case UnaryMathFunction::ATan:
return "ATan";
case UnaryMathFunction::Log10:
return "Log10";
case UnaryMathFunction::Log2:
return "Log2";
case UnaryMathFunction::Log1P:
return "Log1P";
case UnaryMathFunction::ExpM1:
return "ExpM1";
case UnaryMathFunction::CosH:
return "CosH";
case UnaryMathFunction::SinH:
return "SinH";
case UnaryMathFunction::TanH:
return "TanH";
case UnaryMathFunction::ACosH:
return "ACosH";
case UnaryMathFunction::ASinH:
return "ASinH";
case UnaryMathFunction::ATanH:
return "ATanH";
case UnaryMathFunction::Trunc:
return "Trunc";
case UnaryMathFunction::Cbrt:
return "Cbrt";
case UnaryMathFunction::Floor:
return "Floor";
case UnaryMathFunction::Ceil:
return "Ceil";
case UnaryMathFunction::Round:
return "Round";
}
MOZ_CRASH("Unknown function");
}
static const JSFunctionSpec math_static_methods[] = {
JS_FN("toSource", math_toSource, 0, 0),
JS_INLINABLE_FN("abs", math_abs, 1, 0, MathAbs),
JS_INLINABLE_FN("acos", math_acos, 1, 0, MathACos),
JS_INLINABLE_FN("asin", math_asin, 1, 0, MathASin),
JS_INLINABLE_FN("atan", math_atan, 1, 0, MathATan),
JS_INLINABLE_FN("atan2", math_atan2, 2, 0, MathATan2),
JS_INLINABLE_FN("ceil", math_ceil, 1, 0, MathCeil),
JS_INLINABLE_FN("clz32", math_clz32, 1, 0, MathClz32),
JS_INLINABLE_FN("cos", math_cos, 1, 0, MathCos),
JS_INLINABLE_FN("exp", math_exp, 1, 0, MathExp),
JS_INLINABLE_FN("floor", math_floor, 1, 0, MathFloor),
JS_INLINABLE_FN("imul", math_imul, 2, 0, MathImul),
JS_INLINABLE_FN("fround", math_fround, 1, 0, MathFRound),
JS_INLINABLE_FN("log", math_log, 1, 0, MathLog),
JS_INLINABLE_FN("max", math_max, 2, 0, MathMax),
JS_INLINABLE_FN("min", math_min, 2, 0, MathMin),
JS_INLINABLE_FN("pow", math_pow, 2, 0, MathPow),
JS_INLINABLE_FN("random", math_random, 0, 0, MathRandom),
JS_INLINABLE_FN("round", math_round, 1, 0, MathRound),
JS_INLINABLE_FN("sin", math_sin, 1, 0, MathSin),
JS_INLINABLE_FN("sqrt", math_sqrt, 1, 0, MathSqrt),
JS_INLINABLE_FN("tan", math_tan, 1, 0, MathTan),
JS_INLINABLE_FN("log10", math_log10, 1, 0, MathLog10),
JS_INLINABLE_FN("log2", math_log2, 1, 0, MathLog2),
JS_INLINABLE_FN("log1p", math_log1p, 1, 0, MathLog1P),
JS_INLINABLE_FN("expm1", math_expm1, 1, 0, MathExpM1),
JS_INLINABLE_FN("cosh", math_cosh, 1, 0, MathCosH),
JS_INLINABLE_FN("sinh", math_sinh, 1, 0, MathSinH),
JS_INLINABLE_FN("tanh", math_tanh, 1, 0, MathTanH),
JS_INLINABLE_FN("acosh", math_acosh, 1, 0, MathACosH),
JS_INLINABLE_FN("asinh", math_asinh, 1, 0, MathASinH),
JS_INLINABLE_FN("atanh", math_atanh, 1, 0, MathATanH),
JS_INLINABLE_FN("hypot", math_hypot, 2, 0, MathHypot),
JS_INLINABLE_FN("trunc", math_trunc, 1, 0, MathTrunc),
JS_INLINABLE_FN("sign", math_sign, 1, 0, MathSign),
JS_INLINABLE_FN("cbrt", math_cbrt, 1, 0, MathCbrt),
JS_FS_END};
static const JSPropertySpec math_static_properties[] = {
JS_DOUBLE_PS("E", M_E, JSPROP_READONLY | JSPROP_PERMANENT),
JS_DOUBLE_PS("LOG2E", M_LOG2E, JSPROP_READONLY | JSPROP_PERMANENT),
JS_DOUBLE_PS("LOG10E", M_LOG10E, JSPROP_READONLY | JSPROP_PERMANENT),
JS_DOUBLE_PS("LN2", M_LN2, JSPROP_READONLY | JSPROP_PERMANENT),
JS_DOUBLE_PS("LN10", M_LN10, JSPROP_READONLY | JSPROP_PERMANENT),
JS_DOUBLE_PS("PI", M_PI, JSPROP_READONLY | JSPROP_PERMANENT),
JS_DOUBLE_PS("SQRT2", M_SQRT2, JSPROP_READONLY | JSPROP_PERMANENT),
JS_DOUBLE_PS("SQRT1_2", M_SQRT1_2, JSPROP_READONLY | JSPROP_PERMANENT),
JS_STRING_SYM_PS(toStringTag, "Math", JSPROP_READONLY),
JS_PS_END};
static JSObject* CreateMathObject(JSContext* cx, JSProtoKey key) {
RootedObject proto(cx, &cx->global()->getObjectPrototype());
return NewTenuredObjectWithGivenProto(cx, &MathClass, proto);
}
static const ClassSpec MathClassSpec = {CreateMathObject,
nullptr,
math_static_methods,
math_static_properties,
nullptr,
nullptr,
nullptr};
const JSClass js::MathClass = {"Math", JSCLASS_HAS_CACHED_PROTO(JSProto_Math),
JS_NULL_CLASS_OPS, &MathClassSpec};