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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 | |
13 void idct_dequant_0_2x_neon( | |
14 int16_t *q, | |
15 int16_t dq, | |
16 unsigned char *dst, | |
17 int stride) { | |
18 unsigned char *dst0; | |
19 int i, a0, a1; | |
20 int16x8x2_t q2Add; | |
21 int32x2_t d2s32, d4s32; | |
22 uint8x8_t d2u8, d4u8; | |
23 uint16x8_t q1u16, q2u16; | |
24 | |
25 a0 = ((q[0] * dq) + 4) >> 3; | |
26 a1 = ((q[16] * dq) + 4) >> 3; | |
27 q[0] = q[16] = 0; | |
28 q2Add.val[0] = vdupq_n_s16((int16_t)a0); | |
29 q2Add.val[1] = vdupq_n_s16((int16_t)a1); | |
30 | |
31 for (i = 0; i < 2; i++, dst += 4) { | |
32 dst0 = dst; | |
33 d2s32 = vld1_lane_s32((const int32_t *)dst0, d2s32, 0); | |
34 dst0 += stride; | |
35 d2s32 = vld1_lane_s32((const int32_t *)dst0, d2s32, 1); | |
36 dst0 += stride; | |
37 d4s32 = vld1_lane_s32((const int32_t *)dst0, d4s32, 0); | |
38 dst0 += stride; | |
39 d4s32 = vld1_lane_s32((const int32_t *)dst0, d4s32, 1); | |
40 | |
41 q1u16 = vaddw_u8(vreinterpretq_u16_s16(q2Add.val[i]), | |
42 vreinterpret_u8_s32(d2s32)); | |
43 q2u16 = vaddw_u8(vreinterpretq_u16_s16(q2Add.val[i]), | |
44 vreinterpret_u8_s32(d4s32)); | |
45 | |
46 d2u8 = vqmovun_s16(vreinterpretq_s16_u16(q1u16)); | |
47 d4u8 = vqmovun_s16(vreinterpretq_s16_u16(q2u16)); | |
48 | |
49 d2s32 = vreinterpret_s32_u8(d2u8); | |
50 d4s32 = vreinterpret_s32_u8(d4u8); | |
51 | |
52 dst0 = dst; | |
53 vst1_lane_s32((int32_t *)dst0, d2s32, 0); | |
54 dst0 += stride; | |
55 vst1_lane_s32((int32_t *)dst0, d2s32, 1); | |
56 dst0 += stride; | |
57 vst1_lane_s32((int32_t *)dst0, d4s32, 0); | |
58 dst0 += stride; | |
59 vst1_lane_s32((int32_t *)dst0, d4s32, 1); | |
60 } | |
61 return; | |
62 } | |
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