| /* |
| * 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> |
| |
| void idct_dequant_0_2x_neon( |
| int16_t *q, |
| int16_t dq, |
| unsigned char *dst, |
| int stride) { |
| unsigned char *dst0; |
| int i, a0, a1; |
| int16x8x2_t q2Add; |
| int32x2_t d2s32 = vdup_n_s32(0), |
| d4s32 = vdup_n_s32(0); |
| uint8x8_t d2u8, d4u8; |
| uint16x8_t q1u16, q2u16; |
| |
| a0 = ((q[0] * dq) + 4) >> 3; |
| a1 = ((q[16] * dq) + 4) >> 3; |
| q[0] = q[16] = 0; |
| q2Add.val[0] = vdupq_n_s16((int16_t)a0); |
| q2Add.val[1] = vdupq_n_s16((int16_t)a1); |
| |
| for (i = 0; i < 2; i++, dst += 4) { |
| dst0 = dst; |
| d2s32 = vld1_lane_s32((const int32_t *)dst0, d2s32, 0); |
| dst0 += stride; |
| d2s32 = vld1_lane_s32((const int32_t *)dst0, d2s32, 1); |
| dst0 += stride; |
| d4s32 = vld1_lane_s32((const int32_t *)dst0, d4s32, 0); |
| dst0 += stride; |
| d4s32 = vld1_lane_s32((const int32_t *)dst0, d4s32, 1); |
| |
| q1u16 = vaddw_u8(vreinterpretq_u16_s16(q2Add.val[i]), |
| vreinterpret_u8_s32(d2s32)); |
| q2u16 = vaddw_u8(vreinterpretq_u16_s16(q2Add.val[i]), |
| vreinterpret_u8_s32(d4s32)); |
| |
| d2u8 = vqmovun_s16(vreinterpretq_s16_u16(q1u16)); |
| d4u8 = vqmovun_s16(vreinterpretq_s16_u16(q2u16)); |
| |
| d2s32 = vreinterpret_s32_u8(d2u8); |
| d4s32 = vreinterpret_s32_u8(d4u8); |
| |
| dst0 = dst; |
| vst1_lane_s32((int32_t *)dst0, d2s32, 0); |
| dst0 += stride; |
| vst1_lane_s32((int32_t *)dst0, d2s32, 1); |
| dst0 += stride; |
| vst1_lane_s32((int32_t *)dst0, d4s32, 0); |
| dst0 += stride; |
| vst1_lane_s32((int32_t *)dst0, d4s32, 1); |
| } |
| return; |
| } |