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-rw-r--r--js/src/jsmath.cpp1058
1 files changed, 1058 insertions, 0 deletions
diff --git a/js/src/jsmath.cpp b/js/src/jsmath.cpp
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+++ b/js/src/jsmath.cpp
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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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * JS math package.
+ */
+
+#include "jsmath.h"
+
+#include "mozilla/FloatingPoint.h"
+#include "mozilla/MathAlgorithms.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/RandomNum.h"
+#include "mozilla/Unused.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/PropertySpec.h"
+#include "util/Windows.h"
+#include "vm/JSAtom.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::Abs;
+using mozilla::ExponentComponent;
+using mozilla::FloatingPoint;
+using mozilla::IsFinite;
+using mozilla::IsInfinite;
+using mozilla::IsNaN;
+using mozilla::IsNegative;
+using mozilla::IsNegativeZero;
+using mozilla::Maybe;
+using mozilla::NegativeInfinity;
+using mozilla::NumberEqualsInt32;
+using mozilla::PositiveInfinity;
+using mozilla::WrappingMultiply;
+
+template <UnaryMathFunctionType F>
+static bool math_function(JSContext* cx, HandleValue val,
+ MutableHandleValue res) {
+ double x;
+ if (!ToNumber(cx, val, &x)) {
+ return false;
+ }
+
+ // NB: Always stored as a double so the math function can be inlined
+ // through MMathFunction. We also rely on this to avoid type monitoring
+ // in CallIRGenerator::tryAttachMathSqrt.
+ double z = F(x);
+ res.setDouble(z);
+ return true;
+}
+
+template <UnaryMathFunctionType F>
+static bool math_function(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ if (args.length() == 0) {
+ args.rval().setNaN();
+ return true;
+ }
+
+ return math_function<F>(cx, args[0], args.rval());
+}
+
+bool js::math_abs_handle(JSContext* cx, js::HandleValue v,
+ js::MutableHandleValue r) {
+ double x;
+ if (!ToNumber(cx, v, &x)) {
+ return false;
+ }
+
+ double z = Abs(x);
+ r.setNumber(z);
+
+ return true;
+}
+
+bool js::math_abs(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() == 0) {
+ args.rval().setNaN();
+ return true;
+ }
+
+ return math_abs_handle(cx, args[0], args.rval());
+}
+
+double js::math_acos_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::acos(x);
+}
+
+bool js::math_acos(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_acos_impl>(cx, argc, vp);
+}
+
+double js::math_asin_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::asin(x);
+}
+
+bool js::math_asin(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_asin_impl>(cx, argc, vp);
+}
+
+double js::math_atan_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::atan(x);
+}
+
+bool js::math_atan(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_atan_impl>(cx, argc, vp);
+}
+
+double js::ecmaAtan2(double y, double x) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+ return fdlibm::atan2(y, x);
+}
+
+bool js::math_atan2_handle(JSContext* cx, HandleValue y, HandleValue x,
+ MutableHandleValue res) {
+ double dy;
+ if (!ToNumber(cx, y, &dy)) {
+ return false;
+ }
+
+ double dx;
+ if (!ToNumber(cx, x, &dx)) {
+ return false;
+ }
+
+ double z = ecmaAtan2(dy, dx);
+ res.setDouble(z);
+ return true;
+}
+
+bool js::math_atan2(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ return math_atan2_handle(cx, args.get(0), args.get(1), args.rval());
+}
+
+double js::math_ceil_impl(double x) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+ return fdlibm::ceil(x);
+}
+
+bool js::math_ceil_handle(JSContext* cx, HandleValue v,
+ MutableHandleValue res) {
+ double d;
+ if (!ToNumber(cx, v, &d)) return false;
+
+ double result = math_ceil_impl(d);
+ res.setNumber(result);
+ return true;
+}
+
+bool js::math_ceil(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() == 0) {
+ args.rval().setNaN();
+ return true;
+ }
+
+ return math_ceil_handle(cx, args[0], args.rval());
+}
+
+bool js::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_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return cos(x);
+}
+
+bool js::math_cos(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_cos_impl>(cx, argc, vp);
+}
+
+double js::math_exp_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::exp(x);
+}
+
+bool js::math_exp(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_exp_impl>(cx, argc, vp);
+}
+
+double js::math_floor_impl(double x) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+ return fdlibm::floor(x);
+}
+
+bool js::math_floor_handle(JSContext* cx, HandleValue v, MutableHandleValue r) {
+ double d;
+ if (!ToNumber(cx, v, &d)) {
+ return false;
+ }
+
+ double z = math_floor_impl(d);
+ r.setNumber(z);
+
+ return true;
+}
+
+bool js::math_floor(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() == 0) {
+ args.rval().setNaN();
+ return true;
+ }
+
+ return math_floor_handle(cx, args[0], args.rval());
+}
+
+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;
+}
+
+bool js::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;
+}
+
+bool js::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(UnsafeABIStrictness::AllowPendingExceptions);
+ return fdlibm::log(x);
+}
+
+bool js::math_log_handle(JSContext* cx, HandleValue val,
+ MutableHandleValue res) {
+ return math_function<math_log_impl>(cx, val, res);
+}
+
+bool js::math_log(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_log_impl>(cx, argc, vp);
+}
+
+double js::math_max_impl(double x, double y) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+
+ // Math.max(num, NaN) => NaN, Math.max(-0, +0) => +0
+ if (x > y || 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(UnsafeABIStrictness::AllowPendingExceptions);
+
+ // Math.min(num, NaN) => NaN, Math.min(-0, +0) => -0
+ if (x < y || 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;
+}
+
+bool js::minmax_impl(JSContext* cx, bool max, HandleValue a, HandleValue b,
+ MutableHandleValue res) {
+ double x, y;
+
+ if (!ToNumber(cx, a, &x)) {
+ return false;
+ }
+ if (!ToNumber(cx, b, &y)) {
+ return false;
+ }
+
+ if (max) {
+ res.setNumber(math_max_impl(x, y));
+ } else {
+ res.setNumber(math_min_impl(x, y));
+ }
+
+ return true;
+}
+
+double js::powi(double x, int32_t y) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+ uint32_t n = Abs(y);
+ double m = x;
+ double p = 1;
+ while (true) {
+ if ((n & 1) != 0) p *= m;
+ n >>= 1;
+ if (n == 0) {
+ if (y < 0) {
+ // Unfortunately, we have to be careful when p has reached
+ // infinity in the computation, because sometimes the higher
+ // internal precision in the pow() implementation would have
+ // given us a finite p. This happens very rarely.
+
+ double result = 1.0 / p;
+ return (result == 0 && IsInfinite(p))
+ ? pow(x, static_cast<double>(y)) // Avoid pow(double, int).
+ : result;
+ }
+
+ return p;
+ }
+ m *= m;
+ }
+}
+
+double js::ecmaPow(double x, double y) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+
+ /*
+ * 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 (!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 (IsFinite(x) && x != 0.0) {
+ if (y == 0.5) {
+ return sqrt(x);
+ }
+ if (y == -0.5) {
+ return 1.0 / sqrt(x);
+ }
+ }
+ return pow(x, y);
+}
+
+bool js::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();
+}
+
+bool js::math_random(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ args.rval().setDouble(math_random_impl(cx));
+ return true;
+}
+
+bool js::math_round_handle(JSContext* cx, HandleValue arg,
+ MutableHandleValue res) {
+ double d;
+ if (!ToNumber(cx, arg, &d)) {
+ return false;
+ }
+
+ d = math_round_impl(d);
+ res.setNumber(d);
+ return true;
+}
+
+template <typename T>
+T js::GetBiggestNumberLessThan(T x) {
+ MOZ_ASSERT(!IsNegative(x));
+ MOZ_ASSERT(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(UnsafeABIStrictness::AllowPendingExceptions);
+
+ 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);
+}
+
+bool /* ES5 15.8.2.15. */
+js::math_round(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() == 0) {
+ args.rval().setNaN();
+ return true;
+ }
+
+ return math_round_handle(cx, args[0], args.rval());
+}
+
+double js::math_sin_impl(double x) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+ return sin(x);
+}
+
+bool js::math_sin_handle(JSContext* cx, HandleValue val,
+ MutableHandleValue res) {
+ return math_function<math_sin_impl>(cx, val, res);
+}
+
+bool js::math_sin(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_sin_impl>(cx, argc, vp);
+}
+
+double js::math_sqrt_impl(double x) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+ return sqrt(x);
+}
+
+bool js::math_sqrt_handle(JSContext* cx, HandleValue number,
+ MutableHandleValue result) {
+ return math_function<math_sqrt_impl>(cx, number, result);
+}
+
+bool js::math_sqrt(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_sqrt_impl>(cx, argc, vp);
+}
+
+double js::math_tan_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return tan(x);
+}
+
+bool js::math_tan(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_tan_impl>(cx, argc, vp);
+}
+
+double js::math_log10_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::log10(x);
+}
+
+bool js::math_log10(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_log10_impl>(cx, argc, vp);
+}
+
+double js::math_log2_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::log2(x);
+}
+
+bool js::math_log2(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_log2_impl>(cx, argc, vp);
+}
+
+double js::math_log1p_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::log1p(x);
+}
+
+bool js::math_log1p(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_log1p_impl>(cx, argc, vp);
+}
+
+double js::math_expm1_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::expm1(x);
+}
+
+bool js::math_expm1(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_expm1_impl>(cx, argc, vp);
+}
+
+double js::math_cosh_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::cosh(x);
+}
+
+bool js::math_cosh(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_cosh_impl>(cx, argc, vp);
+}
+
+double js::math_sinh_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::sinh(x);
+}
+
+bool js::math_sinh(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_sinh_impl>(cx, argc, vp);
+}
+
+double js::math_tanh_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::tanh(x);
+}
+
+bool js::math_tanh(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_tanh_impl>(cx, argc, vp);
+}
+
+double js::math_acosh_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::acosh(x);
+}
+
+bool js::math_acosh(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_acosh_impl>(cx, argc, vp);
+}
+
+double js::math_asinh_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::asinh(x);
+}
+
+bool js::math_asinh(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_asinh_impl>(cx, argc, vp);
+}
+
+double js::math_atanh_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::atanh(x);
+}
+
+bool js::math_atanh(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_atanh_impl>(cx, argc, vp);
+}
+
+double js::ecmaHypot(double x, double y) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+ 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 (mozilla::IsInfinite(x) || mozilla::IsInfinite(y) ||
+ mozilla::IsInfinite(z) || mozilla::IsInfinite(w)) {
+ return mozilla::PositiveInfinity<double>();
+ }
+
+ if (mozilla::IsNaN(x) || mozilla::IsNaN(y) || mozilla::IsNaN(z) ||
+ mozilla::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 * sqrt(sumsq);
+}
+
+double js::hypot3(double x, double y, double z) {
+ AutoUnsafeCallWithABI unsafe;
+ return hypot4(x, y, z, 0.0);
+}
+
+bool js::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 |= mozilla::IsInfinite(x);
+ isNaN |= mozilla::IsNaN(x);
+ if (isInfinite || isNaN) {
+ continue;
+ }
+
+ hypot_step(scale, sumsq, x);
+ }
+
+ double result = isInfinite ? PositiveInfinity<double>()
+ : isNaN ? GenericNaN()
+ : scale * sqrt(sumsq);
+ res.setDouble(result);
+ return true;
+}
+
+double js::math_trunc_impl(double x) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+ return fdlibm::trunc(x);
+}
+
+float js::math_truncf_impl(float x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::truncf(x);
+}
+
+bool js::math_trunc_handle(JSContext* cx, HandleValue v, MutableHandleValue r) {
+ double x;
+ if (!ToNumber(cx, v, &x)) {
+ return false;
+ }
+
+ r.setNumber(math_trunc_impl(x));
+ return true;
+}
+
+bool js::math_trunc(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ if (args.length() == 0) {
+ args.rval().setNaN();
+ return true;
+ }
+
+ return math_trunc_handle(cx, args[0], args.rval());
+}
+
+double js::math_sign_impl(double x) {
+ AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
+
+ if (mozilla::IsNaN(x)) {
+ return GenericNaN();
+ }
+
+ return x == 0 ? x : x < 0 ? -1 : 1;
+}
+
+bool js::math_sign_handle(JSContext* cx, HandleValue v, MutableHandleValue r) {
+ double x;
+ if (!ToNumber(cx, v, &x)) {
+ return false;
+ }
+
+ r.setNumber(math_sign_impl(x));
+ return true;
+}
+
+bool js::math_sign(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ if (args.length() == 0) {
+ args.rval().setNaN();
+ return true;
+ }
+
+ return math_sign_handle(cx, args[0], args.rval());
+}
+
+double js::math_cbrt_impl(double x) {
+ AutoUnsafeCallWithABI unsafe;
+ return fdlibm::cbrt(x);
+}
+
+bool js::math_cbrt(JSContext* cx, unsigned argc, Value* vp) {
+ return math_function<math_cbrt_impl>(cx, argc, vp);
+}
+
+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::Log:
+ return math_log_impl;
+ case UnaryMathFunction::Sin:
+ return math_sin_impl;
+ case UnaryMathFunction::Cos:
+ return math_cos_impl;
+ case UnaryMathFunction::Exp:
+ return math_exp_impl;
+ case UnaryMathFunction::Tan:
+ return math_tan_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::Log:
+ return "Log";
+ case UnaryMathFunction::Sin:
+ return "Sin";
+ case UnaryMathFunction::Cos:
+ return "Cos";
+ case UnaryMathFunction::Exp:
+ return "Exp";
+ case UnaryMathFunction::Tan:
+ return "Tan";
+ 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(js_toSource_str, 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) {
+ Handle<GlobalObject*> global = cx->global();
+ RootedObject proto(cx, GlobalObject::getOrCreateObjectPrototype(cx, global));
+ if (!proto) {
+ return nullptr;
+ }
+ return NewTenuredObjectWithGivenProto(cx, &MathClass, proto);
+}
+
+static const ClassSpec MathClassSpec = {CreateMathObject,
+ nullptr,
+ math_static_methods,
+ math_static_properties,
+ nullptr,
+ nullptr,
+ nullptr};
+
+const JSClass js::MathClass = {js_Math_str,
+ JSCLASS_HAS_CACHED_PROTO(JSProto_Math),
+ JS_NULL_CLASS_OPS, &MathClassSpec};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 20:18:01 +0000