56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
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* Copyright (c) 2017 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_dsp_rtcd.h"
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#include "vpx_dsp/arm/mem_neon.h"
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void vpx_comp_avg_pred_neon(uint8_t *comp, const uint8_t *pred, int width,
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int height, const uint8_t *ref, int ref_stride) {
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if (width > 8) {
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int x, y;
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for (y = 0; y < height; ++y) {
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for (x = 0; x < width; x += 16) {
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const uint8x16_t p = vld1q_u8(pred + x);
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const uint8x16_t r = vld1q_u8(ref + x);
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const uint8x16_t avg = vrhaddq_u8(p, r);
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vst1q_u8(comp + x, avg);
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}
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comp += width;
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pred += width;
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ref += ref_stride;
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}
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} else {
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int i;
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for (i = 0; i < width * height; i += 16) {
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const uint8x16_t p = vld1q_u8(pred);
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uint8x16_t r;
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if (width == 4) {
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r = load_unaligned_u8q(ref, ref_stride);
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ref += 4 * ref_stride;
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} else {
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const uint8x8_t r_0 = vld1_u8(ref);
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const uint8x8_t r_1 = vld1_u8(ref + ref_stride);
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assert(width == 8);
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r = vcombine_u8(r_0, r_1);
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ref += 2 * ref_stride;
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}
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r = vrhaddq_u8(r, p);
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vst1q_u8(comp, r);
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pred += 16;
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comp += 16;
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}
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}
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}
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