| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #include <arm_neon.h> |
| |
| #include "aom_dsp/inv_txfm.h" |
| #include "aom_ports/mem.h" |
| |
| void aom_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; |
| 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; |
| } |