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  1. /*
  2.  * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include "libavutil/aarch64/asm.S"
  22.  
  23. function ff_vorbis_inverse_coupling_neon, export=1
  24.         movi            v20.4s,  #1<<7, lsl #24
  25.         subs            x2,  x2,  #4
  26.         mov             x3,  x0
  27.         mov             x4,  x1
  28.         b.eq            3f
  29.  
  30.         ld1             {v7.4s},  [x1], #16
  31.         ld1             {v6.4s},  [x0], #16
  32.         cmle            v4.4s,  v7.4s,  #0
  33.         and             v5.16b, v6.16b, v20.16b
  34.         eor             v7.16b, v7.16b, v5.16b
  35.         and             v2.16b, v7.16b, v4.16b
  36.         bic             v3.16b, v7.16b, v4.16b
  37.         fadd            v7.4s,  v6.4s,  v2.4s
  38.         fsub            v6.4s,  v6.4s,  v3.4s
  39. 1:      ld1             {v1.4s},  [x1], #16
  40.         ld1             {v0.4s},  [x0], #16
  41.         cmle            v4.4s,  v1.4s,  #0
  42.         and             v5.16b, v0.16b, v20.16b
  43.         eor             v1.16b, v1.16b, v5.16b
  44.         st1             {v7.4s},  [x3], #16
  45.         st1             {v6.4s},  [x4], #16
  46.         and             v2.16b, v1.16b, v4.16b
  47.         bic             v3.16b, v1.16b, v4.16b
  48.         fadd            v1.4s,  v0.4s,  v2.4s
  49.         fsub            v0.4s,  v0.4s,  v3.4s
  50.         subs            x2,  x2,  #8
  51.         b.le            2f
  52.         ld1             {v7.4s},  [x1], #16
  53.         ld1             {v6.4s},  [x0], #16
  54.         cmle            v4.4s,  v7.4s,  #0
  55.         and             v5.16b, v6.16b, v20.16b
  56.         eor             v7.16b, v7.16b, v5.16b
  57.         st1             {v1.4s},  [x3], #16
  58.         st1             {v0.4s},  [x4], #16
  59.         and             v2.16b, v7.16b, v4.16b
  60.         bic             v3.16b, v7.16b, v4.16b
  61.         fadd            v7.4s,  v6.4s,  v2.4s
  62.         fsub            v6.4s,  v6.4s,  v3.4s
  63.         b               1b
  64.  
  65. 2:      st1             {v1.4s},  [x3], #16
  66.         st1             {v0.4s},  [x4], #16
  67.         b.lt            ret
  68.  
  69. 3:      ld1             {v1.4s},  [x1]
  70.         ld1             {v0.4s},  [x0]
  71.         cmle            v4.4s,  v1.4s,  #0
  72.         and             v5.16b, v0.16b, v20.16b
  73.         eor             v1.16b, v1.16b, v5.16b
  74.         and             v2.16b, v1.16b, v4.16b
  75.         bic             v3.16b, v1.16b, v4.16b
  76.         fadd            v1.4s,  v0.4s,  v2.4s
  77.         fsub            v0.4s,  v0.4s,  v3.4s
  78.         st1             {v1.4s},  [x0], #16
  79.         st1             {v0.4s},  [x1], #16
  80. ret:
  81.         ret
  82. endfunc
  83.