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/*
* Copyright (c) 2014 The WebM 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 <emmintrin.h>
#include "vpx_ports/mem.h"
unsigned int vp9_avg_8x8_sse2(const uint8_t *s, int p) {
__m128i s0, s1, u0;
unsigned int avg = 0;
u0 = _mm_setzero_si128();
s0 = _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)(s)), u0);
s1 = _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)(s + p)), u0);
s0 = _mm_adds_epu16(s0, s1);
s1 = _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)(s + 2 * p)), u0);
s0 = _mm_adds_epu16(s0, s1);
s1 = _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)(s + 3 * p)), u0);
s0 = _mm_adds_epu16(s0, s1);
s1 = _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)(s + 4 * p)), u0);
s0 = _mm_adds_epu16(s0, s1);
s1 = _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)(s + 5 * p)), u0);
s0 = _mm_adds_epu16(s0, s1);
s1 = _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)(s + 6 * p)), u0);
s0 = _mm_adds_epu16(s0, s1);
s1 = _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i *)(s + 7 * p)), u0);
s0 = _mm_adds_epu16(s0, s1);
s0 = _mm_adds_epu16(s0, _mm_srli_si128(s0, 8));
s0 = _mm_adds_epu16(s0, _mm_srli_epi64(s0, 32));
s0 = _mm_adds_epu16(s0, _mm_srli_epi64(s0, 16));
avg = _mm_extract_epi16(s0, 0);
return (avg + 32) >> 6;
}
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