Line data    Source code

       1             : /* This Source Code Form is subject to the terms of the Mozilla Public
       2             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       3             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       4             : 
       5             : #include <xmmintrin.h>
       6             : #include <emmintrin.h>
       7             : 
       8             : /* Before Nehalem _mm_loadu_si128 could be very slow, this trick is a little
       9             :  * faster. Once enough people are on architectures where _mm_loadu_si128 is
      10             :  * fast we can migrate to it.
      11             :  */
      12        4560 : MOZ_ALWAYS_INLINE __m128i loadUnaligned128(const __m128i *aSource)
      13             : {
      14             :   // Yes! We use uninitialized memory here, we'll overwrite it though!
      15        9120 :   __m128 res = _mm_loadl_pi(_mm_set1_ps(0), (const __m64*)aSource);
      16       13680 :   return _mm_castps_si128(_mm_loadh_pi(res, ((const __m64*)(aSource)) + 1));
      17             : }