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 13void 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} 63