| /* |
| * 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. |
| */ |
| #ifndef AV1_COMMON_CDEF_SIMD_H_ |
| #define AV1_COMMON_CDEF_SIMD_H_ |
| |
| #include "aom_dsp/aom_simd.h" |
| |
| // sign(a-b) * min(abs(a-b), max(0, threshold - (abs(a-b) >> adjdamp))) |
| SIMD_INLINE v128 constrain16(v128 a, v128 b, unsigned int threshold, |
| unsigned int adjdamp) { |
| v128 diff = v128_sub_16(a, b); |
| const v128 sign = v128_shr_n_s16(diff, 15); |
| diff = v128_abs_s16(diff); |
| const v128 s = |
| v128_ssub_u16(v128_dup_16(threshold), v128_shr_u16(diff, adjdamp)); |
| return v128_xor(v128_add_16(sign, v128_min_s16(diff, s)), sign); |
| } |
| |
| #endif // AV1_COMMON_CDEF_SIMD_H_ |