ref: 8648a64c83b5660eae774d5d41f34fc014ba7b4b
dir: /vpx_dsp/arm/avg_pred_neon.c/
/* * Copyright (c) 2017 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 <arm_neon.h> #include <assert.h> #include "./vpx_dsp_rtcd.h" #include "vpx_dsp/arm/mem_neon.h" void vpx_comp_avg_pred_neon(uint8_t *comp, const uint8_t *pred, int width, int height, const uint8_t *ref, int ref_stride) { if (width > 8) { int x, y = height; do { for (x = 0; x < width; x += 16) { const uint8x16_t p = vld1q_u8(pred + x); const uint8x16_t r = vld1q_u8(ref + x); const uint8x16_t avg = vrhaddq_u8(p, r); vst1q_u8(comp + x, avg); } comp += width; pred += width; ref += ref_stride; } while (--y); } else if (width == 8) { int i = width * height; do { const uint8x16_t p = vld1q_u8(pred); uint8x16_t r; const uint8x8_t r_0 = vld1_u8(ref); const uint8x8_t r_1 = vld1_u8(ref + ref_stride); r = vcombine_u8(r_0, r_1); ref += 2 * ref_stride; r = vrhaddq_u8(r, p); vst1q_u8(comp, r); pred += 16; comp += 16; i -= 16; } while (i); } else { int i = width * height; assert(width == 4); do { const uint8x16_t p = vld1q_u8(pred); uint8x16_t r; r = load_unaligned_u8q(ref, ref_stride); ref += 4 * ref_stride; r = vrhaddq_u8(r, p); vst1q_u8(comp, r); pred += 16; comp += 16; i -= 16; } while (i); } }