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50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
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* Copyright (c) 2015 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 "./vp9_rtcd.h"
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#include "./vpx_config.h"
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#include "vpx/vpx_integer.h"
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static INLINE unsigned int horizontal_add_u16x8(const uint16x8_t v_16x8) {
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const uint32x4_t a = vpaddlq_u16(v_16x8);
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const uint64x2_t b = vpaddlq_u32(a);
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const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)),
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vreinterpret_u32_u64(vget_high_u64(b)));
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return vget_lane_u32(c, 0);
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}
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unsigned int vp9_avg_8x8_neon(const uint8_t *s, int p) {
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uint8x8_t v_s0 = vld1_u8(s);
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const uint8x8_t v_s1 = vld1_u8(s + p);
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uint16x8_t v_sum = vaddl_u8(v_s0, v_s1);
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v_s0 = vld1_u8(s + 2 * p);
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v_sum = vaddw_u8(v_sum, v_s0);
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v_s0 = vld1_u8(s + 3 * p);
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v_sum = vaddw_u8(v_sum, v_s0);
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v_s0 = vld1_u8(s + 4 * p);
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v_sum = vaddw_u8(v_sum, v_s0);
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v_s0 = vld1_u8(s + 5 * p);
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v_sum = vaddw_u8(v_sum, v_s0);
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v_s0 = vld1_u8(s + 6 * p);
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v_sum = vaddw_u8(v_sum, v_s0);
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v_s0 = vld1_u8(s + 7 * p);
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v_sum = vaddw_u8(v_sum, v_s0);
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return (horizontal_add_u16x8(v_sum) + 32) >> 6;
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}
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