av1_txfm_neon.c (1031B)
1 /* 2 * 3 * Copyright (c) 2018, Alliance for Open Media. All rights reserved. 4 * 5 * This source code is subject to the terms of the BSD 2 Clause License and 6 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 7 * was not distributed with this source code in the LICENSE file, you can 8 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 9 * Media Patent License 1.0 was not distributed with this source code in the 10 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 11 */ 12 #include <arm_neon.h> 13 #include <assert.h> 14 15 #include "config/av1_rtcd.h" 16 17 #include "aom_dsp/arm/mem_neon.h" 18 #include "aom_ports/mem.h" 19 20 void av1_round_shift_array_neon(int32_t *arr, int size, int bit) { 21 assert(!(size % 4)); 22 if (!bit) return; 23 const int32x4_t dup_bits_n_32x4 = vdupq_n_s32((int32_t)(-bit)); 24 for (int i = 0; i < size; i += 4) { 25 int32x4_t tmp_q_s32 = vld1q_s32(arr); 26 tmp_q_s32 = vrshlq_s32(tmp_q_s32, dup_bits_n_32x4); 27 vst1q_s32(arr, tmp_q_s32); 28 arr += 4; 29 } 30 }