82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <arm_neon.h>
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#include <assert.h>
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#include "./vpx_config.h"
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#include "./vpx_dsp_rtcd.h"
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#include "vpx/vpx_integer.h"
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#include "vpx_dsp/arm/mem_neon.h"
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void vpx_subtract_block_neon(int rows, int cols, int16_t *diff,
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ptrdiff_t diff_stride, const uint8_t *src,
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ptrdiff_t src_stride, const uint8_t *pred,
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ptrdiff_t pred_stride) {
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int r = rows, c;
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if (cols > 16) {
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do {
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for (c = 0; c < cols; c += 32) {
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const uint8x16_t s0 = vld1q_u8(&src[c + 0]);
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const uint8x16_t s1 = vld1q_u8(&src[c + 16]);
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const uint8x16_t p0 = vld1q_u8(&pred[c + 0]);
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const uint8x16_t p1 = vld1q_u8(&pred[c + 16]);
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const uint16x8_t d0 = vsubl_u8(vget_low_u8(s0), vget_low_u8(p0));
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const uint16x8_t d1 = vsubl_u8(vget_high_u8(s0), vget_high_u8(p0));
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const uint16x8_t d2 = vsubl_u8(vget_low_u8(s1), vget_low_u8(p1));
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const uint16x8_t d3 = vsubl_u8(vget_high_u8(s1), vget_high_u8(p1));
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vst1q_s16(&diff[c + 0], vreinterpretq_s16_u16(d0));
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vst1q_s16(&diff[c + 8], vreinterpretq_s16_u16(d1));
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vst1q_s16(&diff[c + 16], vreinterpretq_s16_u16(d2));
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vst1q_s16(&diff[c + 24], vreinterpretq_s16_u16(d3));
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}
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diff += diff_stride;
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pred += pred_stride;
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src += src_stride;
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} while (--r);
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} else if (cols > 8) {
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do {
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const uint8x16_t s = vld1q_u8(&src[0]);
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const uint8x16_t p = vld1q_u8(&pred[0]);
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const uint16x8_t d0 = vsubl_u8(vget_low_u8(s), vget_low_u8(p));
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const uint16x8_t d1 = vsubl_u8(vget_high_u8(s), vget_high_u8(p));
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vst1q_s16(&diff[0], vreinterpretq_s16_u16(d0));
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vst1q_s16(&diff[8], vreinterpretq_s16_u16(d1));
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diff += diff_stride;
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pred += pred_stride;
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src += src_stride;
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} while (--r);
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} else if (cols > 4) {
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do {
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const uint8x8_t s = vld1_u8(&src[0]);
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const uint8x8_t p = vld1_u8(&pred[0]);
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const uint16x8_t v_diff = vsubl_u8(s, p);
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vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff));
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diff += diff_stride;
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pred += pred_stride;
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src += src_stride;
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} while (--r);
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} else {
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assert(cols == 4);
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do {
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const uint8x8_t s = load_unaligned_u8(src, (int)src_stride);
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const uint8x8_t p = load_unaligned_u8(pred, (int)pred_stride);
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const uint16x8_t d = vsubl_u8(s, p);
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vst1_s16(diff + 0 * diff_stride, vreinterpret_s16_u16(vget_low_u16(d)));
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vst1_s16(diff + 1 * diff_stride, vreinterpret_s16_u16(vget_high_u16(d)));
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diff += 2 * diff_stride;
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pred += 2 * pred_stride;
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src += 2 * src_stride;
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r -= 2;
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} while (r);
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}
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}
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