1/*
2 *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include <arm_neon.h>
12
13#include "./vp8_rtcd.h"
14
15void vp8_dc_only_idct_add_neon(int16_t input_dc, unsigned char *pred_ptr,
16                               int pred_stride, unsigned char *dst_ptr,
17                               int dst_stride) {
18  int i;
19  uint16_t a1 = ((input_dc + 4) >> 3);
20  uint32x2_t d2u32 = vdup_n_u32(0);
21  uint8x8_t d2u8;
22  uint16x8_t q1u16;
23  uint16x8_t qAdd;
24
25  qAdd = vdupq_n_u16(a1);
26
27  for (i = 0; i < 2; ++i) {
28    d2u32 = vld1_lane_u32((const uint32_t *)pred_ptr, d2u32, 0);
29    pred_ptr += pred_stride;
30    d2u32 = vld1_lane_u32((const uint32_t *)pred_ptr, d2u32, 1);
31    pred_ptr += pred_stride;
32
33    q1u16 = vaddw_u8(qAdd, vreinterpret_u8_u32(d2u32));
34    d2u8 = vqmovun_s16(vreinterpretq_s16_u16(q1u16));
35
36    vst1_lane_u32((uint32_t *)dst_ptr, vreinterpret_u32_u8(d2u8), 0);
37    dst_ptr += dst_stride;
38    vst1_lane_u32((uint32_t *)dst_ptr, vreinterpret_u32_u8(d2u8), 1);
39    dst_ptr += dst_stride;
40  }
41}
42