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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /gfx/2d/SSEHelpers.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/2d/SSEHelpers.h')
-rw-r--r--gfx/2d/SSEHelpers.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/gfx/2d/SSEHelpers.h b/gfx/2d/SSEHelpers.h
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+/* 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));
+}