ref: 3a3b0be09a11a9db7d2c1322cfbb8bd9b670a079
dir: /vpx_dsp/x86/variance_sse2.c/
/*
* Copyright (c) 2010 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> // SSE2
#include "./vpx_config.h"
#include "./vpx_dsp_rtcd.h"
#include "vpx_ports/mem.h"
typedef void (*getNxMvar_fn_t) (const unsigned char *src, int src_stride,
const unsigned char *ref, int ref_stride,
unsigned int *sse, int *sum);
unsigned int vpx_get_mb_ss_sse2(const int16_t *src) {
__m128i vsum = _mm_setzero_si128();
int i;
for (i = 0; i < 32; ++i) {
const __m128i v = _mm_loadu_si128((const __m128i *)src);
vsum = _mm_add_epi32(vsum, _mm_madd_epi16(v, v));
src += 8;
}
vsum = _mm_add_epi32(vsum, _mm_srli_si128(vsum, 8));
vsum = _mm_add_epi32(vsum, _mm_srli_si128(vsum, 4));
return _mm_cvtsi128_si32(vsum);
}
#define READ64(p, stride, i) \
_mm_unpacklo_epi8(_mm_cvtsi32_si128(*(const uint32_t *)(p + i * stride)), \
_mm_cvtsi32_si128(*(const uint32_t *)(p + (i + 1) * stride)))
static void get4x4var_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse, int *sum) {
const __m128i zero = _mm_setzero_si128();
const __m128i src0 = _mm_unpacklo_epi8(READ64(src, src_stride, 0), zero);
const __m128i src1 = _mm_unpacklo_epi8(READ64(src, src_stride, 2), zero);
const __m128i ref0 = _mm_unpacklo_epi8(READ64(ref, ref_stride, 0), zero);
const __m128i ref1 = _mm_unpacklo_epi8(READ64(ref, ref_stride, 2), zero);
const __m128i diff0 = _mm_sub_epi16(src0, ref0);
const __m128i diff1 = _mm_sub_epi16(src1, ref1);
// sum
__m128i vsum = _mm_add_epi16(diff0, diff1);
vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 8));
vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 4));
vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 2));
*sum = (int16_t)_mm_extract_epi16(vsum, 0);
// sse
vsum = _mm_add_epi32(_mm_madd_epi16(diff0, diff0),
_mm_madd_epi16(diff1, diff1));
vsum = _mm_add_epi32(vsum, _mm_srli_si128(vsum, 8));
vsum = _mm_add_epi32(vsum, _mm_srli_si128(vsum, 4));
*sse = _mm_cvtsi128_si32(vsum);
}
void vpx_get8x8var_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse, int *sum) {
const __m128i zero = _mm_setzero_si128();
__m128i vsum = _mm_setzero_si128();
__m128i vsse = _mm_setzero_si128();
int i;
for (i = 0; i < 8; i += 2) {
const __m128i src0 = _mm_unpacklo_epi8(_mm_loadl_epi64(
(const __m128i *)(src + i * src_stride)), zero);
const __m128i ref0 = _mm_unpacklo_epi8(_mm_loadl_epi64(
(const __m128i *)(ref + i * ref_stride)), zero);
const __m128i diff0 = _mm_sub_epi16(src0, ref0);
const __m128i src1 = _mm_unpacklo_epi8(_mm_loadl_epi64(
(const __m128i *)(src + (i + 1) * src_stride)), zero);
const __m128i ref1 = _mm_unpacklo_epi8(_mm_loadl_epi64(
(const __m128i *)(ref + (i + 1) * ref_stride)), zero);
const __m128i diff1 = _mm_sub_epi16(src1, ref1);
vsum = _mm_add_epi16(vsum, diff0);
vsum = _mm_add_epi16(vsum, diff1);
vsse = _mm_add_epi32(vsse, _mm_madd_epi16(diff0, diff0));
vsse = _mm_add_epi32(vsse, _mm_madd_epi16(diff1, diff1));
}
// sum
vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 8));
vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 4));
vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 2));
*sum = (int16_t)_mm_extract_epi16(vsum, 0);
// sse
vsse = _mm_add_epi32(vsse, _mm_srli_si128(vsse, 8));
vsse = _mm_add_epi32(vsse, _mm_srli_si128(vsse, 4));
*sse = _mm_cvtsi128_si32(vsse);
}
void vpx_get16x16var_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse, int *sum) {
const __m128i zero = _mm_setzero_si128();
__m128i vsum = _mm_setzero_si128();
__m128i vsse = _mm_setzero_si128();
int i;
for (i = 0; i < 16; ++i) {
const __m128i s = _mm_loadu_si128((const __m128i *)src);
const __m128i r = _mm_loadu_si128((const __m128i *)ref);
const __m128i src0 = _mm_unpacklo_epi8(s, zero);
const __m128i ref0 = _mm_unpacklo_epi8(r, zero);
const __m128i diff0 = _mm_sub_epi16(src0, ref0);
const __m128i src1 = _mm_unpackhi_epi8(s, zero);
const __m128i ref1 = _mm_unpackhi_epi8(r, zero);
const __m128i diff1 = _mm_sub_epi16(src1, ref1);
vsum = _mm_add_epi16(vsum, diff0);
vsum = _mm_add_epi16(vsum, diff1);
vsse = _mm_add_epi32(vsse, _mm_madd_epi16(diff0, diff0));
vsse = _mm_add_epi32(vsse, _mm_madd_epi16(diff1, diff1));
src += src_stride;
ref += ref_stride;
}
// sum
vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 8));
vsum = _mm_add_epi16(vsum, _mm_srli_si128(vsum, 4));
*sum = (int16_t)_mm_extract_epi16(vsum, 0) +
(int16_t)_mm_extract_epi16(vsum, 1);
// sse
vsse = _mm_add_epi32(vsse, _mm_srli_si128(vsse, 8));
vsse = _mm_add_epi32(vsse, _mm_srli_si128(vsse, 4));
*sse = _mm_cvtsi128_si32(vsse);
}
static void variance_sse2(const unsigned char *src, int src_stride,
const unsigned char *ref, int ref_stride,
int w, int h, unsigned int *sse, int *sum,
getNxMvar_fn_t var_fn, int block_size) {
int i, j;
*sse = 0;
*sum = 0;
for (i = 0; i < h; i += block_size) {
for (j = 0; j < w; j += block_size) {
unsigned int sse0;
int sum0;
var_fn(src + src_stride * i + j, src_stride,
ref + ref_stride * i + j, ref_stride, &sse0, &sum0);
*sse += sse0;
*sum += sum0;
}
}
}
unsigned int vpx_variance4x4_sse2(const unsigned char *src, int src_stride,
const unsigned char *ref, int ref_stride,
unsigned int *sse) {
int sum;
get4x4var_sse2(src, src_stride, ref, ref_stride, sse, &sum);
return *sse - (((unsigned int)sum * sum) >> 4);
}
unsigned int vpx_variance8x4_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 8, 4,
sse, &sum, get4x4var_sse2, 4);
return *sse - (((unsigned int)sum * sum) >> 5);
}
unsigned int vpx_variance4x8_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 4, 8,
sse, &sum, get4x4var_sse2, 4);
return *sse - (((unsigned int)sum * sum) >> 5);
}
unsigned int vpx_variance8x8_sse2(const unsigned char *src, int src_stride,
const unsigned char *ref, int ref_stride,
unsigned int *sse) {
int sum;
vpx_get8x8var_sse2(src, src_stride, ref, ref_stride, sse, &sum);
return *sse - (((unsigned int)sum * sum) >> 6);
}
unsigned int vpx_variance16x8_sse2(const unsigned char *src, int src_stride,
const unsigned char *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 16, 8,
sse, &sum, vpx_get8x8var_sse2, 8);
return *sse - (((unsigned int)sum * sum) >> 7);
}
unsigned int vpx_variance8x16_sse2(const unsigned char *src, int src_stride,
const unsigned char *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 8, 16,
sse, &sum, vpx_get8x8var_sse2, 8);
return *sse - (((unsigned int)sum * sum) >> 7);
}
unsigned int vpx_variance16x16_sse2(const unsigned char *src, int src_stride,
const unsigned char *ref, int ref_stride,
unsigned int *sse) {
int sum;
vpx_get16x16var_sse2(src, src_stride, ref, ref_stride, sse, &sum);
return *sse - (((unsigned int)sum * sum) >> 8);
}
unsigned int vpx_variance32x32_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 32, 32,
sse, &sum, vpx_get16x16var_sse2, 16);
return *sse - (((int64_t)sum * sum) >> 10);
}
unsigned int vpx_variance32x16_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 32, 16,
sse, &sum, vpx_get16x16var_sse2, 16);
return *sse - (((int64_t)sum * sum) >> 9);
}
unsigned int vpx_variance16x32_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 16, 32,
sse, &sum, vpx_get16x16var_sse2, 16);
return *sse - (((int64_t)sum * sum) >> 9);
}
unsigned int vpx_variance64x64_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 64, 64,
sse, &sum, vpx_get16x16var_sse2, 16);
return *sse - (((int64_t)sum * sum) >> 12);
}
unsigned int vpx_variance64x32_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 64, 32,
sse, &sum, vpx_get16x16var_sse2, 16);
return *sse - (((int64_t)sum * sum) >> 11);
}
unsigned int vpx_variance32x64_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 32, 64,
sse, &sum, vpx_get16x16var_sse2, 16);
return *sse - (((int64_t)sum * sum) >> 11);
}
unsigned int vpx_mse8x8_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
vpx_variance8x8_sse2(src, src_stride, ref, ref_stride, sse);
return *sse;
}
unsigned int vpx_mse8x16_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
vpx_variance8x16_sse2(src, src_stride, ref, ref_stride, sse);
return *sse;
}
unsigned int vpx_mse16x8_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
vpx_variance16x8_sse2(src, src_stride, ref, ref_stride, sse);
return *sse;
}
unsigned int vpx_mse16x16_sse2(const uint8_t *src, int src_stride,
const uint8_t *ref, int ref_stride,
unsigned int *sse) {
vpx_variance16x16_sse2(src, src_stride, ref, ref_stride, sse);
return *sse;
}