shift_neon.h (2211B)
1 /* 2 * Copyright (c) 2023, Alliance for Open Media. All rights reserved. 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AV1_ENCODER_ARM_SHIFT_NEON_H_ 13 #define AOM_AV1_ENCODER_ARM_SHIFT_NEON_H_ 14 15 #include <arm_neon.h> 16 17 #define SHIFT_LOOP_HELPER(name, type, intrinsic, arg) \ 18 static inline void name(const type *in, type *out, int size) { \ 19 int i = 0; \ 20 do { \ 21 out[i] = intrinsic(in[i], arg); \ 22 } while (++i < size); \ 23 } 24 25 SHIFT_LOOP_HELPER(shift_left_2_s16_x4, int16x4_t, vshl_n_s16, 2) 26 SHIFT_LOOP_HELPER(shift_left_2_s16_x8, int16x8_t, vshlq_n_s16, 2) 27 SHIFT_LOOP_HELPER(shift_left_2_s32_x4, int32x4_t, vshlq_n_s32, 2) 28 SHIFT_LOOP_HELPER(shift_right_2_round_s16_x8, int16x8_t, vrshrq_n_s16, 2) 29 SHIFT_LOOP_HELPER(shift_right_2_round_s32_x4, int32x4_t, vrshrq_n_s32, 2) 30 SHIFT_LOOP_HELPER(shift_right_4_round_s16_x8, int16x8_t, vrshrq_n_s16, 4) 31 SHIFT_LOOP_HELPER(shift_right_4_round_s32_x4, int32x4_t, vrshrq_n_s32, 4) 32 33 // Addition instructions have slightly better performance compared to shift 34 // instructions on some micro-architectures, so use these for shifts by one. 35 36 SHIFT_LOOP_HELPER(shift_left_1_s16_x4, int16x4_t, vadd_s16, in[i]) 37 SHIFT_LOOP_HELPER(shift_left_1_s16_x8, int16x8_t, vaddq_s16, in[i]) 38 SHIFT_LOOP_HELPER(shift_right_1_round_s16_x4, int16x4_t, vrhadd_s16, 39 vdup_n_s16(0)) 40 SHIFT_LOOP_HELPER(shift_right_1_round_s16_x8, int16x8_t, vrhaddq_s16, 41 vdupq_n_s16(0)) 42 SHIFT_LOOP_HELPER(shift_right_1_round_s32_x4, int32x4_t, vrhaddq_s32, 43 vdupq_n_s32(0)) 44 45 #undef SHIFT_LOOP_HELPER 46 47 #endif // AOM_AV1_ENCODER_ARM_SHIFT_NEON_H_