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Quelle SSEHelpers.hSprache: C |
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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/. */ #include <xmmintrin.h> #include <emmintrin.h> /* Before Nehalem _mm_loadu_si128 could be very slow, this trick is a little * faster. Once enough people are on architectures where _mm_loadu_si128 is * fast we can migrate to it. */ MOZ_ALWAYS_INLINE __m128i loadUnaligned128(const __m128i* aSource) { // Yes! We use uninitialized memory here, we'll overwrite it though! __m128 res = _mm_loadl_pi(_mm_set1_ps(0), (const __m64*)aSource); return _mm_castps_si128(_mm_loadh_pi(res, ((const __m64*)(aSource)) + 1)); }
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2026-07-11