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  1. /*
  2.  * Copyright (c) 2010 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/arm/asm.S"
  22.  
  23. function ff_dca_lfe_fir_neon, export=1
  24.         push            {r4-r6,lr}
  25.  
  26.         add             r4,  r0,  r3,  lsl #2   @ out2
  27.         add             r5,  r2,  #256*4-16     @ cf1
  28.         sub             r1,  r1,  #12
  29.         cmp             r3,  #32
  30.         ite             eq
  31.         moveq           r6,  #256/32
  32.         movne           r6,  #256/64
  33. NOVFP   vldr            s0,  [sp, #16]          @ scale
  34.         mov             lr,  #-16
  35. 1:
  36.         vmov.f32        q2,  #0.0               @ v0
  37.         vmov.f32        q3,  #0.0               @ v1
  38.         mov             r12, r6
  39. 2:
  40.         vld1.32         {q8},     [r2,:128]!    @ cf0
  41.         vld1.32         {q9},     [r5,:128], lr @ cf1
  42.         vld1.32         {q1},     [r1], lr      @ in
  43.         subs            r12, r12, #4
  44.         vrev64.32       q10, q8
  45.         vmla.f32        q3,  q1,  q9
  46.         vmla.f32        d4,  d2,  d21
  47.         vmla.f32        d5,  d3,  d20
  48.         bne             2b
  49.  
  50.         add             r1,  r1,  r6,  lsl #2
  51.         subs            r3,  r3,  #1
  52.         vadd.f32        d4,  d4,  d5
  53.         vadd.f32        d6,  d6,  d7
  54.         vpadd.f32       d4,  d4,  d6
  55.         vmul.f32        d5,  d4,  d0[0]
  56.         vst1.32         {d5[0]},  [r0,:32]!
  57.         vst1.32         {d5[1]},  [r4,:32]!
  58.         bne             1b
  59.  
  60.         pop             {r4-r6,pc}
  61. endfunc
  62.