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ffmpeg / libavcodec / arm / dcadsp_neon.S @ 2912e87a

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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 Libav.
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 *
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 * Libav 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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 * Libav 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 Libav; 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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function ff_dca_lfe_fir_neon, export=1
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        push            {r4-r6,lr}
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        add             r4,  r0,  r3,  lsl #2   @ out2
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        add             r5,  r2,  #256*4-16     @ cf1
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        sub             r1,  r1,  #12
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        cmp             r3,  #32
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        moveq           r6,  #256/32
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        movne           r6,  #256/64
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NOVFP   vldr            s0,  [sp, #16]          @ scale
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        mov             lr,  #-16
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1:
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        vmov.f32        q2,  #0.0               @ v0
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        vmov.f32        q3,  #0.0               @ v1
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        mov             r12, r6
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2:
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        vld1.32         {q8},     [r2,:128]!    @ cf0
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        vld1.32         {q9},     [r5,:128], lr @ cf1
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        vld1.32         {q1},     [r1], lr      @ in
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        subs            r12, r12, #4
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        vrev64.32       q10, q8
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        vmla.f32        q3,  q1,  q9
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        vmla.f32        d4,  d2,  d21
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        vmla.f32        d5,  d3,  d20
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        bne             2b
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        add             r1,  r1,  r6,  lsl #2
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        subs            r3,  r3,  #1
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        vadd.f32        d4,  d4,  d5
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        vadd.f32        d6,  d6,  d7
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        vpadd.f32       d4,  d4,  d6
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        vmul.f32        d5,  d4,  d0[0]
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        vst1.32         {d5[0]},  [r0,:32]!
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        vst1.32         {d5[1]},  [r4,:32]!
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        bne             1b
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        pop             {r4-r6,pc}
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endfunc