/src/mozilla-central/gfx/2d/SSEHelpers.h
Line | Count | Source (jump to first uncovered line) |
1 | | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
2 | | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
3 | | /* This Source Code Form is subject to the terms of the Mozilla Public |
4 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
5 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
6 | | |
7 | | #include <xmmintrin.h> |
8 | | #include <emmintrin.h> |
9 | | |
10 | | /* Before Nehalem _mm_loadu_si128 could be very slow, this trick is a little |
11 | | * faster. Once enough people are on architectures where _mm_loadu_si128 is |
12 | | * fast we can migrate to it. |
13 | | */ |
14 | | MOZ_ALWAYS_INLINE __m128i loadUnaligned128(const __m128i *aSource) |
15 | 0 | { |
16 | 0 | // Yes! We use uninitialized memory here, we'll overwrite it though! |
17 | 0 | __m128 res = _mm_loadl_pi(_mm_set1_ps(0), (const __m64*)aSource); |
18 | 0 | return _mm_castps_si128(_mm_loadh_pi(res, ((const __m64*)(aSource)) + 1)); |
19 | 0 | } |