vpx_dsp/arm/sad_neon.c - webm/libvpx - Git at Google

 /*
  *  Copyright (c) 2014 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 "./vpx_config.h"
 #include "./vpx_dsp_rtcd.h"

 #include "vpx/vpx_integer.h"
 #include "vpx_dsp/arm/mem_neon.h"
 #include "vpx_dsp/arm/sum_neon.h"

 static INLINE unsigned int sad64xh_neon(const uint8_t *src_ptr, int src_stride,
                                         const uint8_t *ref_ptr, int ref_stride,
                                         int h) {
   uint16x8_t sum[4] = { vdupq_n_u16(0), vdupq_n_u16(0), vdupq_n_u16(0),
                         vdupq_n_u16(0) };
   uint32x4_t sum_u32;

   int i = h;
   do {
     uint8x16_t s0, s1, s2, s3, r0, r1, r2, r3;
     uint8x16_t diff0, diff1, diff2, diff3;

     s0 = vld1q_u8(src_ptr);
     r0 = vld1q_u8(ref_ptr);
     diff0 = vabdq_u8(s0, r0);
     sum[0] = vpadalq_u8(sum[0], diff0);

     s1 = vld1q_u8(src_ptr + 16);
     r1 = vld1q_u8(ref_ptr + 16);
     diff1 = vabdq_u8(s1, r1);
     sum[1] = vpadalq_u8(sum[1], diff1);

     s2 = vld1q_u8(src_ptr + 32);
     r2 = vld1q_u8(ref_ptr + 32);
     diff2 = vabdq_u8(s2, r2);
     sum[2] = vpadalq_u8(sum[2], diff2);

     s3 = vld1q_u8(src_ptr + 48);
     r3 = vld1q_u8(ref_ptr + 48);
     diff3 = vabdq_u8(s3, r3);
     sum[3] = vpadalq_u8(sum[3], diff3);

     src_ptr += src_stride;
     ref_ptr += ref_stride;
   } while (--i != 0);

   sum_u32 = vpaddlq_u16(sum[0]);
   sum_u32 = vpadalq_u16(sum_u32, sum[1]);
   sum_u32 = vpadalq_u16(sum_u32, sum[2]);
   sum_u32 = vpadalq_u16(sum_u32, sum[3]);

   return horizontal_add_uint32x4(sum_u32);
 }

 static INLINE unsigned int sad32xh_neon(const uint8_t *src_ptr, int src_stride,
                                         const uint8_t *ref_ptr, int ref_stride,
                                         int h) {
   uint32x4_t sum = vdupq_n_u32(0);

   int i = h;
   do {
     uint8x16_t s0 = vld1q_u8(src_ptr);
     uint8x16_t r0 = vld1q_u8(ref_ptr);
     uint8x16_t diff0 = vabdq_u8(s0, r0);
     uint16x8_t sum0 = vpaddlq_u8(diff0);

     uint8x16_t s1 = vld1q_u8(src_ptr + 16);
     uint8x16_t r1 = vld1q_u8(ref_ptr + 16);
     uint8x16_t diff1 = vabdq_u8(s1, r1);
     uint16x8_t sum1 = vpaddlq_u8(diff1);

     sum = vpadalq_u16(sum, sum0);
     sum = vpadalq_u16(sum, sum1);

     src_ptr += src_stride;
     ref_ptr += ref_stride;
   } while (--i != 0);

   return horizontal_add_uint32x4(sum);
 }

 static INLINE unsigned int sad16xh_neon(const uint8_t *src_ptr, int src_stride,
                                         const uint8_t *ref_ptr, int ref_stride,
                                         int h) {
   uint16x8_t sum = vdupq_n_u16(0);

   int i = h;
   do {
     uint8x16_t s = vld1q_u8(src_ptr);
     uint8x16_t r = vld1q_u8(ref_ptr);

     uint8x16_t diff = vabdq_u8(s, r);
     sum = vpadalq_u8(sum, diff);

     src_ptr += src_stride;
     ref_ptr += ref_stride;
   } while (--i != 0);

   return horizontal_add_uint16x8(sum);
 }

 static INLINE unsigned int sad8xh_neon(const uint8_t *src_ptr, int src_stride,
                                        const uint8_t *ref_ptr, int ref_stride,
                                        int h) {
   uint16x8_t sum = vdupq_n_u16(0);

   int i = h;
   do {
     uint8x8_t s = vld1_u8(src_ptr);
     uint8x8_t r = vld1_u8(ref_ptr);

     sum = vabal_u8(sum, s, r);

     src_ptr += src_stride;
     ref_ptr += ref_stride;
   } while (--i != 0);

   return horizontal_add_uint16x8(sum);
 }

 static INLINE unsigned int sad4xh_neon(const uint8_t *src_ptr, int src_stride,
                                        const uint8_t *ref_ptr, int ref_stride,
                                        int h) {
   uint16x8_t sum = vdupq_n_u16(0);

   int i = h / 2;
   do {
     uint8x8_t s = load_unaligned_u8(src_ptr, src_stride);
     uint8x8_t r = load_unaligned_u8(ref_ptr, ref_stride);

     sum = vabal_u8(sum, s, r);

     src_ptr += 2 * src_stride;
     ref_ptr += 2 * ref_stride;
   } while (--i != 0);

   return horizontal_add_uint16x8(sum);
 }

 #define SAD_WXH_NEON(w, h)                                                   \
   unsigned int vpx_sad##w##x##h##_neon(const uint8_t *src, int src_stride,   \
                                        const uint8_t *ref, int ref_stride) { \
     return sad##w##xh_neon(src, src_stride, ref, ref_stride, (h));           \
   }

 SAD_WXH_NEON(4, 4)
 SAD_WXH_NEON(4, 8)

 SAD_WXH_NEON(8, 4)
 SAD_WXH_NEON(8, 8)
 SAD_WXH_NEON(8, 16)

 SAD_WXH_NEON(16, 8)
 SAD_WXH_NEON(16, 16)
 SAD_WXH_NEON(16, 32)

 SAD_WXH_NEON(32, 16)
 SAD_WXH_NEON(32, 32)
 SAD_WXH_NEON(32, 64)

 SAD_WXH_NEON(64, 32)
 SAD_WXH_NEON(64, 64)

 #undef SAD_WXH_NEON

 #define SAD_SKIP_WXH_NEON(w, h)                                                \
   unsigned int vpx_sad_skip_##w##x##h##_neon(                                  \
       const uint8_t *src, int src_stride, const uint8_t *ref,                  \
       int ref_stride) {                                                        \
     return 2 *                                                                 \
            sad##w##xh_neon(src, 2 * src_stride, ref, 2 * ref_stride, (h) / 2); \
   }

 SAD_SKIP_WXH_NEON(4, 4)
 SAD_SKIP_WXH_NEON(4, 8)

 SAD_SKIP_WXH_NEON(8, 4)
 SAD_SKIP_WXH_NEON(8, 8)
 SAD_SKIP_WXH_NEON(8, 16)

 SAD_SKIP_WXH_NEON(16, 8)
 SAD_SKIP_WXH_NEON(16, 16)
 SAD_SKIP_WXH_NEON(16, 32)

 SAD_SKIP_WXH_NEON(32, 16)
 SAD_SKIP_WXH_NEON(32, 32)
 SAD_SKIP_WXH_NEON(32, 64)

 SAD_SKIP_WXH_NEON(64, 32)
 SAD_SKIP_WXH_NEON(64, 64)

 #undef SAD_SKIP_WXH_NEON

 static INLINE unsigned int sad64xh_avg_neon(const uint8_t *src_ptr,
                                             int src_stride,
                                             const uint8_t *ref_ptr,
                                             int ref_stride, int h,
                                             const uint8_t *second_pred) {
   uint16x8_t sum[4] = { vdupq_n_u16(0), vdupq_n_u16(0), vdupq_n_u16(0),
                         vdupq_n_u16(0) };
   uint32x4_t sum_u32;

   int i = h;
   do {
     uint8x16_t s0, s1, s2, s3, r0, r1, r2, r3, p0, p1, p2, p3;
     uint8x16_t avg0, avg1, avg2, avg3, diff0, diff1, diff2, diff3;

     s0 = vld1q_u8(src_ptr);
     r0 = vld1q_u8(ref_ptr);
     p0 = vld1q_u8(second_pred);
     avg0 = vrhaddq_u8(r0, p0);
     diff0 = vabdq_u8(s0, avg0);
     sum[0] = vpadalq_u8(sum[0], diff0);

     s1 = vld1q_u8(src_ptr + 16);
     r1 = vld1q_u8(ref_ptr + 16);
     p1 = vld1q_u8(second_pred + 16);
     avg1 = vrhaddq_u8(r1, p1);
     diff1 = vabdq_u8(s1, avg1);
     sum[1] = vpadalq_u8(sum[1], diff1);

     s2 = vld1q_u8(src_ptr + 32);
     r2 = vld1q_u8(ref_ptr + 32);
     p2 = vld1q_u8(second_pred + 32);
     avg2 = vrhaddq_u8(r2, p2);
     diff2 = vabdq_u8(s2, avg2);
     sum[2] = vpadalq_u8(sum[2], diff2);

     s3 = vld1q_u8(src_ptr + 48);
     r3 = vld1q_u8(ref_ptr + 48);
     p3 = vld1q_u8(second_pred + 48);
     avg3 = vrhaddq_u8(r3, p3);
     diff3 = vabdq_u8(s3, avg3);
     sum[3] = vpadalq_u8(sum[3], diff3);

     src_ptr += src_stride;
     ref_ptr += ref_stride;
     second_pred += 64;
   } while (--i != 0);

   sum_u32 = vpaddlq_u16(sum[0]);
   sum_u32 = vpadalq_u16(sum_u32, sum[1]);
   sum_u32 = vpadalq_u16(sum_u32, sum[2]);
   sum_u32 = vpadalq_u16(sum_u32, sum[3]);

   return horizontal_add_uint32x4(sum_u32);
 }

 static INLINE unsigned int sad32xh_avg_neon(const uint8_t *src_ptr,
                                             int src_stride,
                                             const uint8_t *ref_ptr,
                                             int ref_stride, int h,
                                             const uint8_t *second_pred) {
   uint32x4_t sum = vdupq_n_u32(0);

   int i = h;
   do {
     uint8x16_t s0 = vld1q_u8(src_ptr);
     uint8x16_t r0 = vld1q_u8(ref_ptr);
     uint8x16_t p0 = vld1q_u8(second_pred);
     uint8x16_t avg0 = vrhaddq_u8(r0, p0);
     uint8x16_t diff0 = vabdq_u8(s0, avg0);
     uint16x8_t sum0 = vpaddlq_u8(diff0);

     uint8x16_t s1 = vld1q_u8(src_ptr + 16);
     uint8x16_t r1 = vld1q_u8(ref_ptr + 16);
     uint8x16_t p1 = vld1q_u8(second_pred + 16);
     uint8x16_t avg1 = vrhaddq_u8(r1, p1);
     uint8x16_t diff1 = vabdq_u8(s1, avg1);
     uint16x8_t sum1 = vpaddlq_u8(diff1);

     sum = vpadalq_u16(sum, sum0);
     sum = vpadalq_u16(sum, sum1);

     src_ptr += src_stride;
     ref_ptr += ref_stride;
     second_pred += 32;
   } while (--i != 0);

   return horizontal_add_uint32x4(sum);
 }

 static INLINE unsigned int sad16xh_avg_neon(const uint8_t *src_ptr,
                                             int src_stride,
                                             const uint8_t *ref_ptr,
                                             int ref_stride, int h,
                                             const uint8_t *second_pred) {
   uint16x8_t sum = vdupq_n_u16(0);

   int i = h;
   do {
     uint8x16_t s = vld1q_u8(src_ptr);
     uint8x16_t r = vld1q_u8(ref_ptr);
     uint8x16_t p = vld1q_u8(second_pred);

     uint8x16_t avg = vrhaddq_u8(r, p);
     uint8x16_t diff = vabdq_u8(s, avg);
     sum = vpadalq_u8(sum, diff);

     src_ptr += src_stride;
     ref_ptr += ref_stride;
     second_pred += 16;
   } while (--i != 0);

   return horizontal_add_uint16x8(sum);
 }

 static INLINE unsigned int sad8xh_avg_neon(const uint8_t *src_ptr,
                                            int src_stride,
                                            const uint8_t *ref_ptr,
                                            int ref_stride, int h,
                                            const uint8_t *second_pred) {
   uint16x8_t sum = vdupq_n_u16(0);

   int i = h;
   do {
     uint8x8_t s = vld1_u8(src_ptr);
     uint8x8_t r = vld1_u8(ref_ptr);
     uint8x8_t p = vld1_u8(second_pred);

     uint8x8_t avg = vrhadd_u8(r, p);
     sum = vabal_u8(sum, s, avg);

     src_ptr += src_stride;
     ref_ptr += ref_stride;
     second_pred += 8;
   } while (--i != 0);

   return horizontal_add_uint16x8(sum);
 }

 static INLINE unsigned int sad4xh_avg_neon(const uint8_t *src_ptr,
                                            int src_stride,
                                            const uint8_t *ref_ptr,
                                            int ref_stride, int h,
                                            const uint8_t *second_pred) {
   uint16x8_t sum = vdupq_n_u16(0);

   int i = h / 2;
   do {
     uint8x8_t s = load_unaligned_u8(src_ptr, src_stride);
     uint8x8_t r = load_unaligned_u8(ref_ptr, ref_stride);
     uint8x8_t p = vld1_u8(second_pred);

     uint8x8_t avg = vrhadd_u8(r, p);
     sum = vabal_u8(sum, s, avg);

     src_ptr += 2 * src_stride;
     ref_ptr += 2 * ref_stride;
     second_pred += 8;
   } while (--i != 0);

   return horizontal_add_uint16x8(sum);
 }

 #define SAD_WXH_AVG_NEON(w, h)                                             \
   uint32_t vpx_sad##w##x##h##_avg_neon(const uint8_t *src, int src_stride, \
                                        const uint8_t *ref, int ref_stride, \
                                        const uint8_t *second_pred) {       \
     return sad##w##xh_avg_neon(src, src_stride, ref, ref_stride, (h),      \
                                second_pred);                               \
   }

 SAD_WXH_AVG_NEON(4, 4)
 SAD_WXH_AVG_NEON(4, 8)

 SAD_WXH_AVG_NEON(8, 4)
 SAD_WXH_AVG_NEON(8, 8)
 SAD_WXH_AVG_NEON(8, 16)

 SAD_WXH_AVG_NEON(16, 8)
 SAD_WXH_AVG_NEON(16, 16)
 SAD_WXH_AVG_NEON(16, 32)

 SAD_WXH_AVG_NEON(32, 16)
 SAD_WXH_AVG_NEON(32, 32)
 SAD_WXH_AVG_NEON(32, 64)

 SAD_WXH_AVG_NEON(64, 32)
 SAD_WXH_AVG_NEON(64, 64)

 #undef SAD_WXH_AVG_NEON
	/*
	* Copyright (c) 2014 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 "./vpx_config.h"
	#include "./vpx_dsp_rtcd.h"

	#include "vpx/vpx_integer.h"
	#include "vpx_dsp/arm/mem_neon.h"
	#include "vpx_dsp/arm/sum_neon.h"

	static INLINE unsigned int sad64xh_neon(const uint8_t *src_ptr, int src_stride,
	const uint8_t *ref_ptr, int ref_stride,
	int h) {
	uint16x8_t sum[4] = { vdupq_n_u16(0), vdupq_n_u16(0), vdupq_n_u16(0),
	vdupq_n_u16(0) };
	uint32x4_t sum_u32;

	int i = h;
	do {
	uint8x16_t s0, s1, s2, s3, r0, r1, r2, r3;
	uint8x16_t diff0, diff1, diff2, diff3;

	s0 = vld1q_u8(src_ptr);
	r0 = vld1q_u8(ref_ptr);
	diff0 = vabdq_u8(s0, r0);
	sum[0] = vpadalq_u8(sum[0], diff0);

	s1 = vld1q_u8(src_ptr + 16);
	r1 = vld1q_u8(ref_ptr + 16);
	diff1 = vabdq_u8(s1, r1);
	sum[1] = vpadalq_u8(sum[1], diff1);

	s2 = vld1q_u8(src_ptr + 32);
	r2 = vld1q_u8(ref_ptr + 32);
	diff2 = vabdq_u8(s2, r2);
	sum[2] = vpadalq_u8(sum[2], diff2);

	s3 = vld1q_u8(src_ptr + 48);
	r3 = vld1q_u8(ref_ptr + 48);
	diff3 = vabdq_u8(s3, r3);
	sum[3] = vpadalq_u8(sum[3], diff3);

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	} while (--i != 0);

	sum_u32 = vpaddlq_u16(sum[0]);
	sum_u32 = vpadalq_u16(sum_u32, sum[1]);
	sum_u32 = vpadalq_u16(sum_u32, sum[2]);
	sum_u32 = vpadalq_u16(sum_u32, sum[3]);

	return horizontal_add_uint32x4(sum_u32);
	}

	static INLINE unsigned int sad32xh_neon(const uint8_t *src_ptr, int src_stride,
	const uint8_t *ref_ptr, int ref_stride,
	int h) {
	uint32x4_t sum = vdupq_n_u32(0);

	int i = h;
	do {
	uint8x16_t s0 = vld1q_u8(src_ptr);
	uint8x16_t r0 = vld1q_u8(ref_ptr);
	uint8x16_t diff0 = vabdq_u8(s0, r0);
	uint16x8_t sum0 = vpaddlq_u8(diff0);

	uint8x16_t s1 = vld1q_u8(src_ptr + 16);
	uint8x16_t r1 = vld1q_u8(ref_ptr + 16);
	uint8x16_t diff1 = vabdq_u8(s1, r1);
	uint16x8_t sum1 = vpaddlq_u8(diff1);

	sum = vpadalq_u16(sum, sum0);
	sum = vpadalq_u16(sum, sum1);

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	} while (--i != 0);

	return horizontal_add_uint32x4(sum);
	}

	static INLINE unsigned int sad16xh_neon(const uint8_t *src_ptr, int src_stride,
	const uint8_t *ref_ptr, int ref_stride,
	int h) {
	uint16x8_t sum = vdupq_n_u16(0);

	int i = h;
	do {
	uint8x16_t s = vld1q_u8(src_ptr);
	uint8x16_t r = vld1q_u8(ref_ptr);

	uint8x16_t diff = vabdq_u8(s, r);
	sum = vpadalq_u8(sum, diff);

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	} while (--i != 0);

	return horizontal_add_uint16x8(sum);
	}

	static INLINE unsigned int sad8xh_neon(const uint8_t *src_ptr, int src_stride,
	const uint8_t *ref_ptr, int ref_stride,
	int h) {
	uint16x8_t sum = vdupq_n_u16(0);

	int i = h;
	do {
	uint8x8_t s = vld1_u8(src_ptr);
	uint8x8_t r = vld1_u8(ref_ptr);

	sum = vabal_u8(sum, s, r);

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	} while (--i != 0);

	return horizontal_add_uint16x8(sum);
	}

	static INLINE unsigned int sad4xh_neon(const uint8_t *src_ptr, int src_stride,
	const uint8_t *ref_ptr, int ref_stride,
	int h) {
	uint16x8_t sum = vdupq_n_u16(0);

	int i = h / 2;
	do {
	uint8x8_t s = load_unaligned_u8(src_ptr, src_stride);
	uint8x8_t r = load_unaligned_u8(ref_ptr, ref_stride);

	sum = vabal_u8(sum, s, r);

	src_ptr += 2 * src_stride;
	ref_ptr += 2 * ref_stride;
	} while (--i != 0);

	return horizontal_add_uint16x8(sum);
	}

	#define SAD_WXH_NEON(w, h) \
	unsigned int vpx_sad##w##x##h##_neon(const uint8_t *src, int src_stride, \
	const uint8_t *ref, int ref_stride) { \
	return sad##w##xh_neon(src, src_stride, ref, ref_stride, (h)); \
	}

	SAD_WXH_NEON(4, 4)
	SAD_WXH_NEON(4, 8)

	SAD_WXH_NEON(8, 4)
	SAD_WXH_NEON(8, 8)
	SAD_WXH_NEON(8, 16)

	SAD_WXH_NEON(16, 8)
	SAD_WXH_NEON(16, 16)
	SAD_WXH_NEON(16, 32)

	SAD_WXH_NEON(32, 16)
	SAD_WXH_NEON(32, 32)
	SAD_WXH_NEON(32, 64)

	SAD_WXH_NEON(64, 32)
	SAD_WXH_NEON(64, 64)

	#undef SAD_WXH_NEON

	#define SAD_SKIP_WXH_NEON(w, h) \
	unsigned int vpx_sad_skip_##w##x##h##_neon( \
	const uint8_t src, int src_stride, const uint8_t ref, \
	int ref_stride) { \
	return 2 * \
	sad##w##xh_neon(src, 2 * src_stride, ref, 2 * ref_stride, (h) / 2); \
	}

	SAD_SKIP_WXH_NEON(4, 4)
	SAD_SKIP_WXH_NEON(4, 8)

	SAD_SKIP_WXH_NEON(8, 4)
	SAD_SKIP_WXH_NEON(8, 8)
	SAD_SKIP_WXH_NEON(8, 16)

	SAD_SKIP_WXH_NEON(16, 8)
	SAD_SKIP_WXH_NEON(16, 16)
	SAD_SKIP_WXH_NEON(16, 32)

	SAD_SKIP_WXH_NEON(32, 16)
	SAD_SKIP_WXH_NEON(32, 32)
	SAD_SKIP_WXH_NEON(32, 64)

	SAD_SKIP_WXH_NEON(64, 32)
	SAD_SKIP_WXH_NEON(64, 64)

	#undef SAD_SKIP_WXH_NEON

	static INLINE unsigned int sad64xh_avg_neon(const uint8_t *src_ptr,
	int src_stride,
	const uint8_t *ref_ptr,
	int ref_stride, int h,
	const uint8_t *second_pred) {
	uint16x8_t sum[4] = { vdupq_n_u16(0), vdupq_n_u16(0), vdupq_n_u16(0),
	vdupq_n_u16(0) };
	uint32x4_t sum_u32;

	int i = h;
	do {
	uint8x16_t s0, s1, s2, s3, r0, r1, r2, r3, p0, p1, p2, p3;
	uint8x16_t avg0, avg1, avg2, avg3, diff0, diff1, diff2, diff3;

	s0 = vld1q_u8(src_ptr);
	r0 = vld1q_u8(ref_ptr);
	p0 = vld1q_u8(second_pred);
	avg0 = vrhaddq_u8(r0, p0);
	diff0 = vabdq_u8(s0, avg0);
	sum[0] = vpadalq_u8(sum[0], diff0);

	s1 = vld1q_u8(src_ptr + 16);
	r1 = vld1q_u8(ref_ptr + 16);
	p1 = vld1q_u8(second_pred + 16);
	avg1 = vrhaddq_u8(r1, p1);
	diff1 = vabdq_u8(s1, avg1);
	sum[1] = vpadalq_u8(sum[1], diff1);

	s2 = vld1q_u8(src_ptr + 32);
	r2 = vld1q_u8(ref_ptr + 32);
	p2 = vld1q_u8(second_pred + 32);
	avg2 = vrhaddq_u8(r2, p2);
	diff2 = vabdq_u8(s2, avg2);
	sum[2] = vpadalq_u8(sum[2], diff2);

	s3 = vld1q_u8(src_ptr + 48);
	r3 = vld1q_u8(ref_ptr + 48);
	p3 = vld1q_u8(second_pred + 48);
	avg3 = vrhaddq_u8(r3, p3);
	diff3 = vabdq_u8(s3, avg3);
	sum[3] = vpadalq_u8(sum[3], diff3);

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	second_pred += 64;
	} while (--i != 0);

	sum_u32 = vpaddlq_u16(sum[0]);
	sum_u32 = vpadalq_u16(sum_u32, sum[1]);
	sum_u32 = vpadalq_u16(sum_u32, sum[2]);
	sum_u32 = vpadalq_u16(sum_u32, sum[3]);

	return horizontal_add_uint32x4(sum_u32);
	}

	static INLINE unsigned int sad32xh_avg_neon(const uint8_t *src_ptr,
	int src_stride,
	const uint8_t *ref_ptr,
	int ref_stride, int h,
	const uint8_t *second_pred) {
	uint32x4_t sum = vdupq_n_u32(0);

	int i = h;
	do {
	uint8x16_t s0 = vld1q_u8(src_ptr);
	uint8x16_t r0 = vld1q_u8(ref_ptr);
	uint8x16_t p0 = vld1q_u8(second_pred);
	uint8x16_t avg0 = vrhaddq_u8(r0, p0);
	uint8x16_t diff0 = vabdq_u8(s0, avg0);
	uint16x8_t sum0 = vpaddlq_u8(diff0);

	uint8x16_t s1 = vld1q_u8(src_ptr + 16);
	uint8x16_t r1 = vld1q_u8(ref_ptr + 16);
	uint8x16_t p1 = vld1q_u8(second_pred + 16);
	uint8x16_t avg1 = vrhaddq_u8(r1, p1);
	uint8x16_t diff1 = vabdq_u8(s1, avg1);
	uint16x8_t sum1 = vpaddlq_u8(diff1);

	sum = vpadalq_u16(sum, sum0);
	sum = vpadalq_u16(sum, sum1);

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	second_pred += 32;
	} while (--i != 0);

	return horizontal_add_uint32x4(sum);
	}

	static INLINE unsigned int sad16xh_avg_neon(const uint8_t *src_ptr,
	int src_stride,
	const uint8_t *ref_ptr,
	int ref_stride, int h,
	const uint8_t *second_pred) {
	uint16x8_t sum = vdupq_n_u16(0);

	int i = h;
	do {
	uint8x16_t s = vld1q_u8(src_ptr);
	uint8x16_t r = vld1q_u8(ref_ptr);
	uint8x16_t p = vld1q_u8(second_pred);

	uint8x16_t avg = vrhaddq_u8(r, p);
	uint8x16_t diff = vabdq_u8(s, avg);
	sum = vpadalq_u8(sum, diff);

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	second_pred += 16;
	} while (--i != 0);

	return horizontal_add_uint16x8(sum);
	}

	static INLINE unsigned int sad8xh_avg_neon(const uint8_t *src_ptr,
	int src_stride,
	const uint8_t *ref_ptr,
	int ref_stride, int h,
	const uint8_t *second_pred) {
	uint16x8_t sum = vdupq_n_u16(0);

	int i = h;
	do {
	uint8x8_t s = vld1_u8(src_ptr);
	uint8x8_t r = vld1_u8(ref_ptr);
	uint8x8_t p = vld1_u8(second_pred);

	uint8x8_t avg = vrhadd_u8(r, p);
	sum = vabal_u8(sum, s, avg);

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	second_pred += 8;
	} while (--i != 0);

	return horizontal_add_uint16x8(sum);
	}

	static INLINE unsigned int sad4xh_avg_neon(const uint8_t *src_ptr,
	int src_stride,
	const uint8_t *ref_ptr,
	int ref_stride, int h,
	const uint8_t *second_pred) {
	uint16x8_t sum = vdupq_n_u16(0);

	int i = h / 2;
	do {
	uint8x8_t s = load_unaligned_u8(src_ptr, src_stride);
	uint8x8_t r = load_unaligned_u8(ref_ptr, ref_stride);
	uint8x8_t p = vld1_u8(second_pred);

	uint8x8_t avg = vrhadd_u8(r, p);
	sum = vabal_u8(sum, s, avg);

	src_ptr += 2 * src_stride;
	ref_ptr += 2 * ref_stride;
	second_pred += 8;
	} while (--i != 0);

	return horizontal_add_uint16x8(sum);
	}

	#define SAD_WXH_AVG_NEON(w, h) \
	uint32_t vpx_sad##w##x##h##_avg_neon(const uint8_t *src, int src_stride, \
	const uint8_t *ref, int ref_stride, \
	const uint8_t *second_pred) { \
	return sad##w##xh_avg_neon(src, src_stride, ref, ref_stride, (h), \
	second_pred); \
	}

	SAD_WXH_AVG_NEON(4, 4)
	SAD_WXH_AVG_NEON(4, 8)

	SAD_WXH_AVG_NEON(8, 4)
	SAD_WXH_AVG_NEON(8, 8)
	SAD_WXH_AVG_NEON(8, 16)

	SAD_WXH_AVG_NEON(16, 8)
	SAD_WXH_AVG_NEON(16, 16)
	SAD_WXH_AVG_NEON(16, 32)

	SAD_WXH_AVG_NEON(32, 16)
	SAD_WXH_AVG_NEON(32, 32)
	SAD_WXH_AVG_NEON(32, 64)

	SAD_WXH_AVG_NEON(64, 32)
	SAD_WXH_AVG_NEON(64, 64)

	#undef SAD_WXH_AVG_NEON