ref: b19f8b1607e56121b03c9e53127df5ed5d165ae5
dir: /vpx_dsp/mips/add_noise_msa.c/
/*
* Copyright (c) 2015 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 <stdlib.h>
#include "./macros_msa.h"
void vpx_plane_add_noise_msa(uint8_t *start_ptr, const int8_t *noise,
int blackclamp, int whiteclamp,
int width, int height, int32_t pitch) {
uint32_t i, j;
for (i = 0; i < height / 2; ++i) {
uint8_t *pos0_ptr = start_ptr + (2 * i) * pitch;
const int8_t *ref0_ptr = noise + (rand() & 0xff);
uint8_t *pos1_ptr = start_ptr + (2 * i + 1) * pitch;
const int8_t *ref1_ptr = noise + (rand() & 0xff);
for (j = width / 16; j--;) {
v16i8 temp00_s, temp01_s;
v16u8 temp00, temp01, black_clamp, white_clamp;
v16u8 pos0, ref0, pos1, ref1;
v16i8 const127 = __msa_ldi_b(127);
pos0 = LD_UB(pos0_ptr);
ref0 = LD_UB(ref0_ptr);
pos1 = LD_UB(pos1_ptr);
ref1 = LD_UB(ref1_ptr);
black_clamp = (v16u8)__msa_fill_b(blackclamp);
white_clamp = (v16u8)__msa_fill_b(whiteclamp);
temp00 = (pos0 < black_clamp);
pos0 = __msa_bmnz_v(pos0, black_clamp, temp00);
temp01 = (pos1 < black_clamp);
pos1 = __msa_bmnz_v(pos1, black_clamp, temp01);
XORI_B2_128_UB(pos0, pos1);
temp00_s = __msa_adds_s_b((v16i8)white_clamp, const127);
temp00 = (v16u8)(temp00_s < pos0);
pos0 = (v16u8)__msa_bmnz_v((v16u8)pos0, (v16u8)temp00_s, temp00);
temp01_s = __msa_adds_s_b((v16i8)white_clamp, const127);
temp01 = (temp01_s < pos1);
pos1 = (v16u8)__msa_bmnz_v((v16u8)pos1, (v16u8)temp01_s, temp01);
XORI_B2_128_UB(pos0, pos1);
pos0 += ref0;
ST_UB(pos0, pos0_ptr);
pos1 += ref1;
ST_UB(pos1, pos1_ptr);
pos0_ptr += 16;
pos1_ptr += 16;
ref0_ptr += 16;
ref1_ptr += 16;
}
}
}