You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/* Copyright (C) 2004 Jean-Marc Valin */
|
|
/**
|
|
@file vq_arm4.h
|
|
@brief ARM4-optimized vq routine
|
|
*/
|
|
/*
|
|
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_VQ_NBEST
|
|
void vq_nbest(spx_word16_t *in, const spx_word16_t *codebook, int len, int entries, spx_word32_t *E, int N, int *nbest, spx_word32_t *best_dist, char *stack)
|
|
{
|
|
int i,j;
|
|
for (i=0;i<entries;i+=4)
|
|
{
|
|
#if 1
|
|
spx_word32_t dist1, dist2, dist3, dist4;
|
|
int dead1, dead2, dead3, dead4, dead5, dead6, dead7, dead8;
|
|
__asm__ __volatile__ (
|
|
"mov %0, #0 \n\t"
|
|
"mov %1, #0 \n\t"
|
|
"mov %2, #0 \n\t"
|
|
"mov %3, #0 \n\t"
|
|
"mov %10, %4 \n\t"
|
|
"add %4, %4, %4\n\t"
|
|
".vqloop%=:\n\t"
|
|
"ldrsh %7, [%5], #2 \n\t"
|
|
"ldrsh %8, [%6] \n\t"
|
|
"mov %9, %6 \n\t"
|
|
"mla %0, %7, %8, %0 \n\t"
|
|
"ldrsh %8, [%9, %4]! \n\t"
|
|
"mla %1, %7, %8, %1 \n\t"
|
|
"ldrsh %8, [%9, %4]!\n\t"
|
|
"mla %2, %7, %8, %2 \n\t"
|
|
"ldrsh %8, [%9, %4]! \n\t"
|
|
"mla %3, %7, %8, %3 \n\t"
|
|
"subs %10, %10, #1 \n\t"
|
|
"add %6, %6, #2 \n\t"
|
|
"bne .vqloop%="
|
|
: "=r" (dist1), "=r" (dist2), "=r" (dist3), "=r" (dist4),
|
|
"=r" (dead1), "=r" (dead2), "=r" (codebook), "=r" (dead4),
|
|
"=r" (dead5), "=r" (dead6), "=r" (dead7)
|
|
: "4" (len), "5" (in), "6" (codebook)
|
|
: "cc");
|
|
#else
|
|
dist1=dist2=dist3=dist4=0;
|
|
/* spx_word32_t dist1=0;
|
|
spx_word32_t dist2=0;
|
|
spx_word32_t dist3=0;
|
|
spx_word32_t dist4=0;*/
|
|
for (j=0;j<2;j++)
|
|
{
|
|
const spx_word16_t *code = codebook;
|
|
dist1 = MAC16_16(dist1,in[j],*code);
|
|
code += len;
|
|
dist2 = MAC16_16(dist2,in[j],*code);
|
|
code += len;
|
|
dist3 = MAC16_16(dist3,in[j],*code);
|
|
code += len;
|
|
dist4 = MAC16_16(dist4,in[j],*code);
|
|
codebook++;
|
|
}
|
|
#endif
|
|
dist1=SUB32(SHR(*E++,1),dist1);
|
|
if (dist1<*best_dist || i==0)
|
|
{
|
|
*best_dist=dist1;
|
|
*nbest=i;
|
|
}
|
|
dist2=SUB32(SHR(*E++,1),dist2);
|
|
if (dist2<*best_dist)
|
|
{
|
|
*best_dist=dist2;
|
|
*nbest=i+1;
|
|
}
|
|
dist3=SUB32(SHR(*E++,1),dist3);
|
|
if (dist3<*best_dist)
|
|
{
|
|
*best_dist=dist3;
|
|
*nbest=i+2;
|
|
}
|
|
dist4=SUB32(SHR(*E++,1),dist4);
|
|
if (dist4<*best_dist)
|
|
{
|
|
*best_dist=dist4;
|
|
*nbest=i+3;
|
|
}
|
|
codebook += 3*len;
|
|
}
|
|
}
|