| /* |
| * 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> |
| |
| #include "vpx_dsp/inv_txfm.h" |
| #include "vpx_ports/mem.h" |
| |
| void vpx_idct4x4_1_add_neon(int16_t *input, uint8_t *dest, int dest_stride) { |
| uint8x8_t d6u8; |
| uint32x2_t d2u32 = vdup_n_u32(0); |
| uint16x8_t q8u16; |
| int16x8_t q0s16; |
| uint8_t *d1, *d2; |
| int16_t i, a1, cospi_16_64 = 11585; |
| int16_t out = dct_const_round_shift(input[0] * cospi_16_64); |
| out = dct_const_round_shift(out * cospi_16_64); |
| a1 = ROUND_POWER_OF_TWO(out, 4); |
| |
| q0s16 = vdupq_n_s16(a1); |
| |
| // dc_only_idct_add |
| d1 = d2 = dest; |
| for (i = 0; i < 2; i++) { |
| d2u32 = vld1_lane_u32((const uint32_t *)d1, d2u32, 0); |
| d1 += dest_stride; |
| d2u32 = vld1_lane_u32((const uint32_t *)d1, d2u32, 1); |
| d1 += dest_stride; |
| |
| q8u16 = vaddw_u8(vreinterpretq_u16_s16(q0s16), vreinterpret_u8_u32(d2u32)); |
| d6u8 = vqmovun_s16(vreinterpretq_s16_u16(q8u16)); |
| |
| vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 0); |
| d2 += dest_stride; |
| vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 1); |
| d2 += dest_stride; |
| } |
| return; |
| } |