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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <arm_neon.h>
#include "config/aom_config.h"
#include "aom/aom_integer.h"
#include "aom_ports/mem.h"
void aom_subtract_block_neon(int rows, int cols, int16_t *diff,
ptrdiff_t diff_stride, const uint8_t *src,
ptrdiff_t src_stride, const uint8_t *pred,
ptrdiff_t pred_stride) {
if (cols > 16) {
int r = rows;
do {
int c = 0;
do {
const uint8x16_t v_src_00 = vld1q_u8(&src[c + 0]);
const uint8x16_t v_src_16 = vld1q_u8(&src[c + 16]);
const uint8x16_t v_pred_00 = vld1q_u8(&pred[c + 0]);
const uint8x16_t v_pred_16 = vld1q_u8(&pred[c + 16]);
const uint16x8_t v_diff_lo_00 =
vsubl_u8(vget_low_u8(v_src_00), vget_low_u8(v_pred_00));
const uint16x8_t v_diff_hi_00 =
vsubl_u8(vget_high_u8(v_src_00), vget_high_u8(v_pred_00));
const uint16x8_t v_diff_lo_16 =
vsubl_u8(vget_low_u8(v_src_16), vget_low_u8(v_pred_16));
const uint16x8_t v_diff_hi_16 =
vsubl_u8(vget_high_u8(v_src_16), vget_high_u8(v_pred_16));
vst1q_s16(&diff[c + 0], vreinterpretq_s16_u16(v_diff_lo_00));
vst1q_s16(&diff[c + 8], vreinterpretq_s16_u16(v_diff_hi_00));
vst1q_s16(&diff[c + 16], vreinterpretq_s16_u16(v_diff_lo_16));
vst1q_s16(&diff[c + 24], vreinterpretq_s16_u16(v_diff_hi_16));
c += 32;
} while (c < cols);
diff += diff_stride;
pred += pred_stride;
src += src_stride;
} while (--r != 0);
} else if (cols > 8) {
int r = rows;
do {
const uint8x16_t v_src = vld1q_u8(&src[0]);
const uint8x16_t v_pred = vld1q_u8(&pred[0]);
const uint16x8_t v_diff_lo =
vsubl_u8(vget_low_u8(v_src), vget_low_u8(v_pred));
const uint16x8_t v_diff_hi =
vsubl_u8(vget_high_u8(v_src), vget_high_u8(v_pred));
vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff_lo));
vst1q_s16(&diff[8], vreinterpretq_s16_u16(v_diff_hi));
diff += diff_stride;
pred += pred_stride;
src += src_stride;
} while (--r != 0);
} else if (cols > 4) {
int r = rows;
do {
const uint8x8_t v_src = vld1_u8(&src[0]);
const uint8x8_t v_pred = vld1_u8(&pred[0]);
const uint16x8_t v_diff = vsubl_u8(v_src, v_pred);
vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff));
diff += diff_stride;
pred += pred_stride;
src += src_stride;
} while (--r != 0);
} else {
int r = rows;
do {
int c = 0;
do {
diff[c] = src[c] - pred[c];
} while (++c < cols);
diff += diff_stride;
pred += pred_stride;
src += src_stride;
} while (--r != 0);
}
}
#if CONFIG_AV1_HIGHBITDEPTH
void aom_highbd_subtract_block_neon(int rows, int cols, int16_t *diff,
ptrdiff_t diff_stride, const uint8_t *src8,
ptrdiff_t src_stride, const uint8_t *pred8,
ptrdiff_t pred_stride) {
uint16_t *src = CONVERT_TO_SHORTPTR(src8);
uint16_t *pred = CONVERT_TO_SHORTPTR(pred8);
if (cols > 16) {
int r = rows;
do {
int c = 0;
do {
const uint16x8_t v_src_00 = vld1q_u16(&src[c + 0]);
const uint16x8_t v_pred_00 = vld1q_u16(&pred[c + 0]);
const uint16x8_t v_diff_00 = vsubq_u16(v_src_00, v_pred_00);
const uint16x8_t v_src_08 = vld1q_u16(&src[c + 8]);
const uint16x8_t v_pred_08 = vld1q_u16(&pred[c + 8]);
const uint16x8_t v_diff_08 = vsubq_u16(v_src_08, v_pred_08);
vst1q_s16(&diff[c + 0], vreinterpretq_s16_u16(v_diff_00));
vst1q_s16(&diff[c + 8], vreinterpretq_s16_u16(v_diff_08));
c += 16;
} while (c < cols);
diff += diff_stride;
pred += pred_stride;
src += src_stride;
} while (--r != 0);
} else if (cols > 8) {
int r = rows;
do {
const uint16x8_t v_src_00 = vld1q_u16(&src[0]);
const uint16x8_t v_pred_00 = vld1q_u16(&pred[0]);
const uint16x8_t v_diff_00 = vsubq_u16(v_src_00, v_pred_00);
const uint16x8_t v_src_08 = vld1q_u16(&src[8]);
const uint16x8_t v_pred_08 = vld1q_u16(&pred[8]);
const uint16x8_t v_diff_08 = vsubq_u16(v_src_08, v_pred_08);
vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff_00));
vst1q_s16(&diff[8], vreinterpretq_s16_u16(v_diff_08));
diff += diff_stride;
pred += pred_stride;
src += src_stride;
} while (--r != 0);
} else if (cols > 4) {
int r = rows;
do {
const uint16x8_t v_src_r0 = vld1q_u16(&src[0]);
const uint16x8_t v_src_r1 = vld1q_u16(&src[src_stride]);
const uint16x8_t v_pred_r0 = vld1q_u16(&pred[0]);
const uint16x8_t v_pred_r1 = vld1q_u16(&pred[pred_stride]);
const uint16x8_t v_diff_r0 = vsubq_u16(v_src_r0, v_pred_r0);
const uint16x8_t v_diff_r1 = vsubq_u16(v_src_r1, v_pred_r1);
vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff_r0));
vst1q_s16(&diff[diff_stride], vreinterpretq_s16_u16(v_diff_r1));
diff += diff_stride << 1;
pred += pred_stride << 1;
src += src_stride << 1;
r -= 2;
} while (r != 0);
} else {
int r = rows;
do {
const uint16x4_t v_src_r0 = vld1_u16(&src[0]);
const uint16x4_t v_src_r1 = vld1_u16(&src[src_stride]);
const uint16x4_t v_pred_r0 = vld1_u16(&pred[0]);
const uint16x4_t v_pred_r1 = vld1_u16(&pred[pred_stride]);
const uint16x4_t v_diff_r0 = vsub_u16(v_src_r0, v_pred_r0);
const uint16x4_t v_diff_r1 = vsub_u16(v_src_r1, v_pred_r1);
vst1_s16(&diff[0], vreinterpret_s16_u16(v_diff_r0));
vst1_s16(&diff[diff_stride], vreinterpret_s16_u16(v_diff_r1));
diff += diff_stride << 1;
pred += pred_stride << 1;
src += src_stride << 1;
r -= 2;
} while (r != 0);
}
}
#endif // CONFIG_AV1_HIGHBITDEPTH
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