| /* |
| * 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/idct_neon.h" |
| #include "vpx_dsp/txfm_common.h" |
| |
| void vpx_idct4x4_16_add_neon(const tran_low_t *input, uint8_t *dest, |
| int stride) { |
| const uint8_t *dst = dest; |
| const int16x4_t cospis = vld1_s16(kCospi); |
| uint32x2_t dest01_u32 = vdup_n_u32(0); |
| uint32x2_t dest32_u32 = vdup_n_u32(0); |
| int16x8_t a0, a1; |
| uint8x8_t d01, d32; |
| uint16x8_t d01_u16, d32_u16; |
| |
| assert(!((intptr_t)dest % sizeof(uint32_t))); |
| assert(!(stride % sizeof(uint32_t))); |
| |
| // Rows |
| a0 = load_tran_low_to_s16q(input); |
| a1 = load_tran_low_to_s16q(input + 8); |
| idct4x4_16_kernel_bd8(cospis, &a0, &a1); |
| |
| // Columns |
| a1 = vcombine_s16(vget_high_s16(a1), vget_low_s16(a1)); |
| idct4x4_16_kernel_bd8(cospis, &a0, &a1); |
| a0 = vrshrq_n_s16(a0, 4); |
| a1 = vrshrq_n_s16(a1, 4); |
| |
| dest01_u32 = vld1_lane_u32((const uint32_t *)dst, dest01_u32, 0); |
| dst += stride; |
| dest01_u32 = vld1_lane_u32((const uint32_t *)dst, dest01_u32, 1); |
| dst += stride; |
| dest32_u32 = vld1_lane_u32((const uint32_t *)dst, dest32_u32, 1); |
| dst += stride; |
| dest32_u32 = vld1_lane_u32((const uint32_t *)dst, dest32_u32, 0); |
| |
| d01_u16 = |
| vaddw_u8(vreinterpretq_u16_s16(a0), vreinterpret_u8_u32(dest01_u32)); |
| d32_u16 = |
| vaddw_u8(vreinterpretq_u16_s16(a1), vreinterpret_u8_u32(dest32_u32)); |
| d01 = vqmovun_s16(vreinterpretq_s16_u16(d01_u16)); |
| d32 = vqmovun_s16(vreinterpretq_s16_u16(d32_u16)); |
| |
| vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d01), 0); |
| dest += stride; |
| vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d01), 1); |
| dest += stride; |
| vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d32), 1); |
| dest += stride; |
| vst1_lane_u32((uint32_t *)dest, vreinterpret_u32_u8(d32), 0); |
| } |