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  1. /*
  2.  * ARM NEON optimised Format Conversion Utils
  3.  * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #include "config.h"
  23. #include "libavutil/arm/asm.S"
  24.  
  25. function ff_int32_to_float_fmul_scalar_neon, export=1
  26. VFP     vdup.32         q0,  d0[0]
  27. VFP     len     .req    r2
  28. NOVFP   vdup.32         q0,  r2
  29. NOVFP   len     .req    r3
  30.  
  31.         vld1.32         {q1},[r1,:128]!
  32.         vcvt.f32.s32    q3,  q1
  33.         vld1.32         {q2},[r1,:128]!
  34.         vcvt.f32.s32    q8,  q2
  35. 1:      subs            len, len, #8
  36.         pld             [r1, #16]
  37.         vmul.f32        q9,  q3,  q0
  38.         vmul.f32        q10, q8,  q0
  39.         beq             2f
  40.         vld1.32         {q1},[r1,:128]!
  41.         vcvt.f32.s32    q3,  q1
  42.         vld1.32         {q2},[r1,:128]!
  43.         vcvt.f32.s32    q8,  q2
  44.         vst1.32         {q9}, [r0,:128]!
  45.         vst1.32         {q10},[r0,:128]!
  46.         b               1b
  47. 2:      vst1.32         {q9}, [r0,:128]!
  48.         vst1.32         {q10},[r0,:128]!
  49.         bx              lr
  50.         .unreq  len
  51. endfunc
  52.