Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2016, 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             : #ifndef AV1_COMMON_CDEF_SIMD_H_
      12             : #define AV1_COMMON_CDEF_SIMD_H_
      13             : 
      14             : #include "aom_dsp/aom_simd.h"
      15             : 
      16             : // sign(a-b) * min(abs(a-b), max(0, threshold - (abs(a-b) >> adjdamp)))
      17             : SIMD_INLINE v128 constrain16(v128 a, v128 b, unsigned int threshold,
      18             :                              unsigned int adjdamp) {
      19           0 :   v128 diff = v128_sub_16(a, b);
      20           0 :   const v128 sign = v128_shr_n_s16(diff, 15);
      21           0 :   diff = v128_abs_s16(diff);
      22           0 :   const v128 s =
      23           0 :       v128_ssub_u16(v128_dup_16(threshold), v128_shr_u16(diff, adjdamp));
      24           0 :   return v128_xor(v128_add_16(sign, v128_min_s16(diff, s)), sign);
      25             : }
      26             : 
      27             : #endif  // AV1_COMMON_CDEF_SIMD_H_