6805448195
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26376 a1c6a512-1295-4272-9138-f99709370657
188 lines
6.4 KiB
C
188 lines
6.4 KiB
C
/* Copyright (C) 2004 Jean-Marc Valin */
|
|
/**
|
|
@file ltp_arm4.h
|
|
@brief Long-Term Prediction functions (ARM4 version)
|
|
*/
|
|
/*
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
- Neither the name of the Xiph.org Foundation nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#define OVERRIDE_INNER_PROD
|
|
spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len)
|
|
{
|
|
spx_word32_t sum1=0,sum2=0;
|
|
spx_word16_t *deadx, *deady;
|
|
int deadlen, dead1, dead2, dead3, dead4, dead5, dead6;
|
|
__asm__ __volatile__ (
|
|
"\tldrsh %5, [%0], #2 \n"
|
|
"\tldrsh %6, [%1], #2 \n"
|
|
".inner_prod_loop%=:\n"
|
|
"\tsub %7, %7, %7\n"
|
|
"\tsub %10, %10, %10\n"
|
|
|
|
"\tldrsh %8, [%0], #2 \n"
|
|
"\tldrsh %9, [%1], #2 \n"
|
|
"\tmla %7, %5, %6, %7\n"
|
|
"\tldrsh %5, [%0], #2 \n"
|
|
"\tldrsh %6, [%1], #2 \n"
|
|
"\tmla %10, %8, %9, %10\n"
|
|
"\tldrsh %8, [%0], #2 \n"
|
|
"\tldrsh %9, [%1], #2 \n"
|
|
"\tmla %7, %5, %6, %7\n"
|
|
"\tldrsh %5, [%0], #2 \n"
|
|
"\tldrsh %6, [%1], #2 \n"
|
|
"\tmla %10, %8, %9, %10\n"
|
|
|
|
"\tldrsh %8, [%0], #2 \n"
|
|
"\tldrsh %9, [%1], #2 \n"
|
|
"\tmla %7, %5, %6, %7\n"
|
|
"\tldrsh %5, [%0], #2 \n"
|
|
"\tldrsh %6, [%1], #2 \n"
|
|
"\tmla %10, %8, %9, %10\n"
|
|
"\tldrsh %8, [%0], #2 \n"
|
|
"\tldrsh %9, [%1], #2 \n"
|
|
"\tmla %7, %5, %6, %7\n"
|
|
"\tldrsh %5, [%0], #2 \n"
|
|
"\tldrsh %6, [%1], #2 \n"
|
|
"\tmla %10, %8, %9, %10\n"
|
|
|
|
"\tsubs %4, %4, #1\n"
|
|
"\tadd %2, %2, %7, asr #5\n"
|
|
"\tadd %3, %3, %10, asr #5\n"
|
|
"\tbne .inner_prod_loop%=\n"
|
|
: "=r" (deadx), "=r" (deady), "+r" (sum1), "+r" (sum2),
|
|
"=r" (deadlen), "=r" (dead1), "=r" (dead2), "=r" (dead3),
|
|
"=r" (dead4), "=r" (dead5), "=r" (dead6)
|
|
: "0" (x), "1" (y), "4" (len>>3)
|
|
: "cc", "memory"
|
|
);
|
|
return (sum1+sum2)>>1;
|
|
}
|
|
|
|
#define OVERRIDE_PITCH_XCORR
|
|
void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack)
|
|
{
|
|
(void)stack;
|
|
int i,j;
|
|
for (i=0;i<nb_pitch;i+=4)
|
|
{
|
|
/* Compute correlation*/
|
|
//corr[nb_pitch-1-i]=inner_prod(x, _y+i, len);
|
|
spx_word32_t sum1=0;
|
|
spx_word32_t sum2=0;
|
|
spx_word32_t sum3=0;
|
|
spx_word32_t sum4=0;
|
|
const spx_word16_t *y = _y+i;
|
|
const spx_word16_t *x = _x;
|
|
spx_word32_t y0, y1, y2, y3;
|
|
y0=*y++;
|
|
y1=*y++;
|
|
y2=*y++;
|
|
y3=*y++;
|
|
for (j=0;j<len;j+=4)
|
|
{
|
|
spx_word32_t part1, part2, part3, part4, x0;
|
|
spx_word32_t dead1;
|
|
__asm__ __volatile__ (
|
|
#ifdef SHORTCUTS
|
|
"\tldrsh %10, [%8], #4 \n"
|
|
"\tmul %4, %10, %0 \n"
|
|
"\tldrsh %15, [%8], #4 \n"
|
|
"\tmul %5, %10, %1 \n"
|
|
"\tldrsh %0, [%9], #2 \n"
|
|
"\tmul %6, %10, %2 \n"
|
|
"\tldrsh %1, [%9], #2 \n"
|
|
"\tmul %7, %10, %3 \n"
|
|
|
|
|
|
"\tmla %4, %15, %2, %4 \n"
|
|
"\tldrsh %2, [%9], #2 \n"
|
|
"\tmla %5, %15, %3, %5 \n"
|
|
"\tldrsh %3, [%9], #2 \n"
|
|
"\tmla %6, %15, %0, %6 \n"
|
|
"\tmla %7, %15, %1, %7 \n"
|
|
|
|
#else
|
|
"\tldrsh %10, [%8], #2 \n"
|
|
"\tmul %4, %10, %0 \n"
|
|
"\tmul %5, %10, %1 \n"
|
|
"\tmul %6, %10, %2 \n"
|
|
"\tmul %7, %10, %3 \n"
|
|
|
|
"\tldrsh %10, [%8], #2 \n"
|
|
"\tldrsh %0, [%9], #2 \n"
|
|
"\tmla %4, %10, %1, %4 \n"
|
|
"\tmla %5, %10, %2, %5 \n"
|
|
"\tmla %6, %10, %3, %6 \n"
|
|
"\tmla %7, %10, %0, %7 \n"
|
|
|
|
"\tldrsh %10, [%8], #2 \n"
|
|
"\tldrsh %1, [%9], #2 \n"
|
|
"\tmla %4, %10, %2, %4 \n"
|
|
"\tmla %5, %10, %3, %5 \n"
|
|
"\tmla %6, %10, %0, %6 \n"
|
|
"\tmla %7, %10, %1, %7 \n"
|
|
|
|
"\tldrsh %10, [%8], #2 \n"
|
|
"\tldrsh %2, [%9], #2 \n"
|
|
"\tmla %4, %10, %3, %4 \n"
|
|
"\tmla %5, %10, %0, %5 \n"
|
|
"\tmla %6, %10, %1, %6 \n"
|
|
"\tmla %7, %10, %2, %7 \n"
|
|
|
|
"\tldrsh %3, [%9], #2 \n"
|
|
#endif
|
|
|
|
"\tldr %10, %11 \n"
|
|
"\tldr %15, %12 \n"
|
|
"\tadd %4, %10, %4, asr #6 \n"
|
|
"\tstr %4, %11 \n"
|
|
"\tldr %10, %13 \n"
|
|
"\tadd %5, %15, %5, asr #6 \n"
|
|
"\tstr %5, %12 \n"
|
|
"\tldr %15, %14 \n"
|
|
"\tadd %6, %10, %6, asr #6 \n"
|
|
"\tadd %7, %15, %7, asr #6 \n"
|
|
"\tstr %6, %13 \n"
|
|
"\tstr %7, %14 \n"
|
|
|
|
: "+r" (y0), "+r" (y1), "+r" (y2), "+r" (y3),
|
|
"=r" (part1), "=r" (part2), "=r" (part3), "=r" (part4),
|
|
"+r" (x), "+r" (y), "=r" (x0), "+m" (sum1),
|
|
"+m" (sum2), "+m" (sum3), "+m" (sum4), "=r" (dead1)
|
|
:
|
|
: "cc", "memory"
|
|
);
|
|
}
|
|
corr[nb_pitch-1-i]=sum1;
|
|
corr[nb_pitch-2-i]=sum2;
|
|
corr[nb_pitch-3-i]=sum3;
|
|
corr[nb_pitch-4-i]=sum4;
|
|
}
|
|
|
|
}
|