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Viewing changes to libavcodec/arm/synth_filter_neon.S

  • Committer: Bazaar Package Importer
  • Author(s): Reinhard Tartler
  • Date: 2011-03-20 12:09:31 UTC
  • Revision ID: james.westby@ubuntu.com-20110320120931-nfhi9tiok27gxhw1
Tags: upstream-0.6.2
Import upstream version 0.6.2

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libavcodec/arm/synth_filter_neon.S
 
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/*
 
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 * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
 
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 *
 
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 * This file is part of FFmpeg.
 
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 *
 
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 * FFmpeg is free software; you can redistribute it and/or
 
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 * modify it under the terms of the GNU Lesser General Public
 
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 * License as published by the Free Software Foundation; either
 
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 * version 2.1 of the License, or (at your option) any later version.
 
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 *
 
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 * FFmpeg is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 
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 * Lesser General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU Lesser General Public
 
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 * License along with FFmpeg; if not, write to the Free Software
 
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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 */
 
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#include "asm.S"
 
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        preserve8
 
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function ff_synth_filter_float_neon, export=1
 
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        push            {r3-r11,lr}
 
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        ldr             r4,  [r2]               @ synth_buf_offset
 
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        add             r1,  r1,  r4,  lsl #2   @ synth_buf
 
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        sub             r12, r4,  #32
 
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        bfc             r12, #9,  #23
 
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        bic             r4,  r4,  #63
 
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        str             r12, [r2]
 
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        ldr             r2,  [sp, #12*4]        @ in
 
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        mov             r9,  r1                 @ synth_buf
 
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VFP     vpush           {d0}
 
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        bl              ff_imdct_half_neon
 
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VFP     vpop            {d0}
 
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        pop             {r3}
 
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        ldr             r5,  [sp, #9*4]         @ window
 
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        ldr             r2,  [sp, #10*4]        @ out
 
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NOVFP   vldr            d0,  [sp, #12*4]        @ scale, bias
 
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        add             r8,  r9,  #12*4
 
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        mov             lr,  #64*4
 
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        mov             r1,  #4
 
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1:
 
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        add             r10, r9,  #16*4         @ synth_buf
 
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        add             r11, r8,  #16*4
 
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        add             r0,  r5,  #16*4         @ window
 
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        add             r6,  r5,  #32*4
 
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        add             r7,  r5,  #48*4
 
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        vld1.32         {q10},    [r3,:128]     @ a
 
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        add             r3,  r3,  #16*4
 
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        vld1.32         {q1},     [r3,:128]     @ b
 
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        vmov.f32        q2,  #0.0               @ c
 
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        vmov.f32        q3,  #0.0               @ d
 
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        mov             r12, #512
 
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2:
 
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        vld1.32         {q9},     [r8, :128], lr
 
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        vrev64.32       q9,  q9
 
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        vld1.32         {q8},     [r5, :128], lr
 
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        vmls.f32        d20, d16, d19
 
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        vld1.32         {q11},    [r0, :128], lr
 
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        vmls.f32        d21, d17, d18
 
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        vld1.32         {q12},    [r9, :128], lr
 
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        vmla.f32        d2,  d22, d24
 
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        vld1.32         {q8},     [r6, :128], lr
 
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        vmla.f32        d3,  d23, d25
 
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        vld1.32         {q9},     [r10,:128], lr
 
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        vmla.f32        d4,  d16, d18
 
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        vld1.32         {q12},    [r11,:128], lr
 
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        vmla.f32        d5,  d17, d19
 
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        vrev64.32       q12, q12
 
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        vld1.32         {q11},    [r7, :128], lr
 
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        vmla.f32        d6,  d22, d25
 
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        vmla.f32        d7,  d23, d24
 
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        subs            r12, r12, #64
 
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        beq             3f
 
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        cmp             r12, r4
 
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        bne             2b
 
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        sub             r8,  r8,  #512*4
 
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        sub             r9,  r9,  #512*4
 
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        sub             r10, r10, #512*4
 
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        sub             r11, r11, #512*4
 
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        b               2b
 
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3:
 
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        vdup.32         q8,  d0[1]
 
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        vdup.32         q9,  d0[1]
 
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        vmla.f32        q8,  q10, d0[0]
 
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        vmla.f32        q9,  q1,  d0[0]
 
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        vst1.32         {q3},     [r3,:128]
 
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        sub             r3,  r3,  #16*4
 
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        vst1.32         {q2},     [r3,:128]
 
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        vst1.32         {q8},     [r2,:128]
 
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        add             r2,  r2,  #16*4
 
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        vst1.32         {q9},     [r2,:128]
 
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        subs            r1,  r1,  #1
 
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        popeq           {r4-r11,pc}
 
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        cmp             r4,  #0
 
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        subeq           r8,  r8,  #512*4
 
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        subeq           r9,  r9,  #512*4
 
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        sub             r5,  r5,  #512*4
 
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        sub             r2,  r2,  #12*4         @ out
 
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        add             r3,  r3,  #4*4          @ synth_buf2
 
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        add             r5,  r5,  #4*4          @ window
 
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        add             r9,  r9,  #4*4          @ synth_buf
 
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        sub             r8,  r8,  #4*4          @ synth_buf
 
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        b               1b
 
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endfunc