From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- js/src/jslibmath.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 js/src/jslibmath.h (limited to 'js/src/jslibmath.h') diff --git a/js/src/jslibmath.h b/js/src/jslibmath.h new file mode 100644 index 0000000000..5c6416ef36 --- /dev/null +++ b/js/src/jslibmath.h @@ -0,0 +1,53 @@ +/* -*- 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/. */ + +#ifndef jslibmath_h +#define jslibmath_h + +#include "mozilla/FloatingPoint.h" + +#include + +#include "js/Value.h" +#include "vm/JSContext.h" + +namespace js { + +inline double NumberDiv(double a, double b) { + AutoUnsafeCallWithABI unsafe; + if (b == 0) { + if (a == 0 || std::isnan(a)) { + return JS::GenericNaN(); + } + if (mozilla::IsNegative(a) != mozilla::IsNegative(b)) { + return mozilla::NegativeInfinity(); + } + return mozilla::PositiveInfinity(); + } + + return a / b; +} + +inline double NumberMod(double a, double b) { + AutoUnsafeCallWithABI unsafe; + if (b == 0) { + return JS::GenericNaN(); + } + double r = fmod(a, b); +#if defined(XP_WIN) + // Some versions of Windows (Win 10 v1803, v1809) miscompute the sign of zero + // results from fmod. The sign should match the sign of the LHS. This bug + // only affects 64-bit builds. See bug 1527007. + if (mozilla::IsPositiveZero(r) && mozilla::IsNegative(a)) { + return -0.0; + } +#endif + return r; +} + +} // namespace js + +#endif /* jslibmath_h */ -- cgit v1.2.3