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Side by Side Diff: source/libvpx/vp9/common/arm/neon/vp9_idct4x4_1_add_neon.c

Issue 812033011: libvpx: Pull from upstream (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/libvpx/
Patch Set: Created 5 years, 11 months ago
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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 #include "vp9/common/vp9_idct.h"
13
14 void vp9_idct4x4_1_add_neon(
15 int16_t *input,
16 uint8_t *dest,
17 int dest_stride) {
18 uint8x8_t d6u8;
19 uint32x2_t d2u32 = vdup_n_u32(0);
20 uint16x8_t q8u16;
21 int16x8_t q0s16;
22 uint8_t *d1, *d2;
23 int16_t i, a1, cospi_16_64 = 11585;
24 int16_t out = dct_const_round_shift(input[0] * cospi_16_64);
25 out = dct_const_round_shift(out * cospi_16_64);
26 a1 = ROUND_POWER_OF_TWO(out, 4);
27
28 q0s16 = vdupq_n_s16(a1);
29
30 // dc_only_idct_add
31 d1 = d2 = dest;
32 for (i = 0; i < 2; i++) {
33 d2u32 = vld1_lane_u32((const uint32_t *)d1, d2u32, 0);
34 d1 += dest_stride;
35 d2u32 = vld1_lane_u32((const uint32_t *)d1, d2u32, 1);
36 d1 += dest_stride;
37
38 q8u16 = vaddw_u8(vreinterpretq_u16_s16(q0s16),
39 vreinterpret_u8_u32(d2u32));
40 d6u8 = vqmovun_s16(vreinterpretq_s16_u16(q8u16));
41
42 vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 0);
43 d2 += dest_stride;
44 vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 1);
45 d2 += dest_stride;
46 }
47 return;
48 }
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