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/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/desktop_capture/differ_vector_sse2.h"
#if defined(_MSC_VER)
#include <intrin.h>
#else
#include <emmintrin.h>
#include <mmintrin.h>
#endif
namespace webrtc {
extern bool VectorDifference_SSE2_W16(const uint8_t* image1,
const uint8_t* image2) {
__m128i acc = _mm_setzero_si128();
__m128i v0;
__m128i v1;
__m128i sad;
const __m128i* i1 = reinterpret_cast<const __m128i*>(image1);
const __m128i* i2 = reinterpret_cast<const __m128i*>(image2);
v0 = _mm_loadu_si128(i1);
v1 = _mm_loadu_si128(i2);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 1);
v1 = _mm_loadu_si128(i2 + 1);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 2);
v1 = _mm_loadu_si128(i2 + 2);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 3);
v1 = _mm_loadu_si128(i2 + 3);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
// This essential means sad = acc >> 64. We only care about the lower 16
// bits.
sad = _mm_shuffle_epi32(acc, 0xEE);
sad = _mm_adds_epu16(sad, acc);
return _mm_cvtsi128_si32(sad) != 0;
}
extern bool VectorDifference_SSE2_W32(const uint8_t* image1,
const uint8_t* image2) {
__m128i acc = _mm_setzero_si128();
__m128i v0;
__m128i v1;
__m128i sad;
const __m128i* i1 = reinterpret_cast<const __m128i*>(image1);
const __m128i* i2 = reinterpret_cast<const __m128i*>(image2);
v0 = _mm_loadu_si128(i1);
v1 = _mm_loadu_si128(i2);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 1);
v1 = _mm_loadu_si128(i2 + 1);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 2);
v1 = _mm_loadu_si128(i2 + 2);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 3);
v1 = _mm_loadu_si128(i2 + 3);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 4);
v1 = _mm_loadu_si128(i2 + 4);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 5);
v1 = _mm_loadu_si128(i2 + 5);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 6);
v1 = _mm_loadu_si128(i2 + 6);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
v0 = _mm_loadu_si128(i1 + 7);
v1 = _mm_loadu_si128(i2 + 7);
sad = _mm_sad_epu8(v0, v1);
acc = _mm_adds_epu16(acc, sad);
// This essential means sad = acc >> 64. We only care about the lower 16
// bits.
sad = _mm_shuffle_epi32(acc, 0xEE);
sad = _mm_adds_epu16(sad, acc);
return _mm_cvtsi128_si32(sad) != 0;
}
} // namespace webrtc
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