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188 lines
6.4 KiB
C
188 lines
6.4 KiB
C
/* Copyright (C) 2004 Jean-Marc Valin */
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/**
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@file ltp_arm4.h
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@brief Long-Term Prediction functions (ARM4 version)
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define OVERRIDE_INNER_PROD
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spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len)
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{
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spx_word32_t sum1=0,sum2=0;
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spx_word16_t *deadx, *deady;
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int deadlen, dead1, dead2, dead3, dead4, dead5, dead6;
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__asm__ __volatile__ (
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"\tldrsh %5, [%0], #2 \n"
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"\tldrsh %6, [%1], #2 \n"
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".inner_prod_loop%=:\n"
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"\tsub %7, %7, %7\n"
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"\tsub %10, %10, %10\n"
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"\tldrsh %8, [%0], #2 \n"
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"\tldrsh %9, [%1], #2 \n"
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"\tmla %7, %5, %6, %7\n"
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"\tldrsh %5, [%0], #2 \n"
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"\tldrsh %6, [%1], #2 \n"
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"\tmla %10, %8, %9, %10\n"
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"\tldrsh %8, [%0], #2 \n"
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"\tldrsh %9, [%1], #2 \n"
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"\tmla %7, %5, %6, %7\n"
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"\tldrsh %5, [%0], #2 \n"
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"\tldrsh %6, [%1], #2 \n"
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"\tmla %10, %8, %9, %10\n"
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"\tldrsh %8, [%0], #2 \n"
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"\tldrsh %9, [%1], #2 \n"
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"\tmla %7, %5, %6, %7\n"
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"\tldrsh %5, [%0], #2 \n"
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"\tldrsh %6, [%1], #2 \n"
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"\tmla %10, %8, %9, %10\n"
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"\tldrsh %8, [%0], #2 \n"
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"\tldrsh %9, [%1], #2 \n"
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"\tmla %7, %5, %6, %7\n"
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"\tldrsh %5, [%0], #2 \n"
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"\tldrsh %6, [%1], #2 \n"
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"\tmla %10, %8, %9, %10\n"
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"\tsubs %4, %4, #1\n"
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"\tadd %2, %2, %7, asr #5\n"
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"\tadd %3, %3, %10, asr #5\n"
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"\tbne .inner_prod_loop%=\n"
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: "=r" (deadx), "=r" (deady), "+r" (sum1), "+r" (sum2),
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"=r" (deadlen), "=r" (dead1), "=r" (dead2), "=r" (dead3),
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"=r" (dead4), "=r" (dead5), "=r" (dead6)
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: "0" (x), "1" (y), "4" (len>>3)
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: "cc"
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);
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return (sum1+sum2)>>1;
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}
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#define OVERRIDE_PITCH_XCORR
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void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack)
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{
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int i,j;
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for (i=0;i<nb_pitch;i+=4)
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{
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/* Compute correlation*/
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//corr[nb_pitch-1-i]=inner_prod(x, _y+i, len);
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spx_word32_t sum1=0;
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spx_word32_t sum2=0;
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spx_word32_t sum3=0;
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spx_word32_t sum4=0;
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const spx_word16_t *y = _y+i;
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const spx_word16_t *x = _x;
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spx_word32_t y0, y1, y2, y3;
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y0=*y++;
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y1=*y++;
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y2=*y++;
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y3=*y++;
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for (j=0;j<len;j+=4)
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{
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spx_word32_t part1, part2, part3, part4, x0;
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spx_word32_t dead1;
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__asm__ __volatile__ (
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#ifdef SHORTCUTS
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"\tldrsh %10, [%8], #4 \n"
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"\tmul %4, %10, %0 \n"
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"\tldrsh %15, [%8], #4 \n"
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"\tmul %5, %10, %1 \n"
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"\tldrsh %0, [%9], #2 \n"
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"\tmul %6, %10, %2 \n"
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"\tldrsh %1, [%9], #2 \n"
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"\tmul %7, %10, %3 \n"
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"\tmla %4, %15, %2, %4 \n"
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"\tldrsh %2, [%9], #2 \n"
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"\tmla %5, %15, %3, %5 \n"
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"\tldrsh %3, [%9], #2 \n"
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"\tmla %6, %15, %0, %6 \n"
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"\tmla %7, %15, %1, %7 \n"
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#else
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"\tldrsh %10, [%8], #2 \n"
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"\tmul %4, %10, %0 \n"
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"\tmul %5, %10, %1 \n"
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"\tmul %6, %10, %2 \n"
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"\tmul %7, %10, %3 \n"
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"\tldrsh %10, [%8], #2 \n"
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"\tldrsh %0, [%9], #2 \n"
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"\tmla %4, %10, %1, %4 \n"
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"\tmla %5, %10, %2, %5 \n"
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"\tmla %6, %10, %3, %6 \n"
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"\tmla %7, %10, %0, %7 \n"
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"\tldrsh %10, [%8], #2 \n"
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"\tldrsh %1, [%9], #2 \n"
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"\tmla %4, %10, %2, %4 \n"
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"\tmla %5, %10, %3, %5 \n"
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"\tmla %6, %10, %0, %6 \n"
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"\tmla %7, %10, %1, %7 \n"
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"\tldrsh %10, [%8], #2 \n"
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"\tldrsh %2, [%9], #2 \n"
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"\tmla %4, %10, %3, %4 \n"
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"\tmla %5, %10, %0, %5 \n"
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"\tmla %6, %10, %1, %6 \n"
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"\tmla %7, %10, %2, %7 \n"
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"\tldrsh %3, [%9], #2 \n"
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#endif
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"\tldr %10, %11 \n"
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"\tldr %15, %12 \n"
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"\tadd %4, %10, %4, asr #6 \n"
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"\tstr %4, %11 \n"
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"\tldr %10, %13 \n"
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"\tadd %5, %15, %5, asr #6 \n"
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"\tstr %5, %12 \n"
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"\tldr %15, %14 \n"
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"\tadd %6, %10, %6, asr #6 \n"
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"\tadd %7, %15, %7, asr #6 \n"
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"\tstr %6, %13 \n"
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"\tstr %7, %14 \n"
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: "+r" (y0), "+r" (y1), "+r" (y2), "+r" (y3),
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"=r" (part1), "=r" (part2), "=r" (part3), "=r" (part4),
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"+r" (x), "+r" (y), "=r" (x0), "+m" (sum1),
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"+m" (sum2), "+m" (sum3), "+m" (sum4), "=r" (dead1)
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:
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: "cc", "memory"
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);
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}
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corr[nb_pitch-1-i]=sum1;
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corr[nb_pitch-2-i]=sum2;
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corr[nb_pitch-3-i]=sum3;
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corr[nb_pitch-4-i]=sum4;
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}
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}
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