18 lines
727 B
C
18 lines
727 B
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <xmmintrin.h>
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#include <emmintrin.h>
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/* Before Nehalem _mm_loadu_si128 could be very slow, this trick is a little
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* faster. Once enough people are on architectures where _mm_loadu_si128 is
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* fast we can migrate to it.
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*/
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MOZ_ALWAYS_INLINE __m128i loadUnaligned128(const __m128i *aSource)
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{
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// Yes! We use uninitialized memory here, we'll overwrite it though!
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__m128 res = _mm_loadl_pi(_mm_set1_ps(0), (const __m64*)aSource);
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return _mm_castps_si128(_mm_loadh_pi(res, ((const __m64*)(aSource)) + 1));
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}
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