gfx/2d/SSEHelpers.h
author Peter Van der Beken <peterv@propagandism.org>
Tue, 07 Oct 2014 11:44:48 +0200
changeset 209153 b2238670c5bfadfe00fe080a225d7bf3446e03de
parent 112526 e89f1fce980d6371c06166cc5558fc63a735554b
permissions -rw-r--r--
Bug 808856 - Make not overriding WrapObject fail to build. r=ehsan.

/* 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));
}