| /* |
| * 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 <assert.h> |
| |
| #include "./vpx_dsp_rtcd.h" |
| #include "vpx_dsp/arm/mem_neon.h" |
| #include "vpx_dsp/inv_txfm.h" |
| |
| static INLINE void idct4x4_1_add_kernel(uint8_t **dest, const int stride, |
| const int16x8_t res, |
| uint32x2_t *const d) { |
| uint16x8_t a; |
| uint8x8_t b; |
| *d = vld1_lane_u32((const uint32_t *)*dest, *d, 0); |
| *d = vld1_lane_u32((const uint32_t *)(*dest + stride), *d, 1); |
| a = vaddw_u8(vreinterpretq_u16_s16(res), vreinterpret_u8_u32(*d)); |
| b = vqmovun_s16(vreinterpretq_s16_u16(a)); |
| vst1_lane_u32((uint32_t *)*dest, vreinterpret_u32_u8(b), 0); |
| *dest += stride; |
| vst1_lane_u32((uint32_t *)*dest, vreinterpret_u32_u8(b), 1); |
| *dest += stride; |
| } |
| |
| void vpx_idct4x4_1_add_neon(const tran_low_t *input, uint8_t *dest, |
| int stride) { |
| const int16_t out0 = |
| WRAPLOW(dct_const_round_shift((int16_t)input[0] * cospi_16_64)); |
| const int16_t out1 = WRAPLOW(dct_const_round_shift(out0 * cospi_16_64)); |
| const int16_t a1 = ROUND_POWER_OF_TWO(out1, 4); |
| const int16x8_t dc = vdupq_n_s16(a1); |
| uint32x2_t d = vdup_n_u32(0); |
| |
| assert(!((intptr_t)dest % sizeof(uint32_t))); |
| assert(!(stride % sizeof(uint32_t))); |
| |
| idct4x4_1_add_kernel(&dest, stride, dc, &d); |
| idct4x4_1_add_kernel(&dest, stride, dc, &d); |
| } |