mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-13 03:34:20 +00:00
108 lines
4.0 KiB
C
108 lines
4.0 KiB
C
/* Copyright (C) 2005 Analog Devices */
|
|
/**
|
|
@file vq_bfin.h
|
|
@author Jean-Marc Valin
|
|
@brief Blackfin-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)
|
|
{
|
|
if (N==1)
|
|
{
|
|
best_dist[0] = 2147483647;
|
|
{
|
|
spx_word32_t dist;
|
|
__asm__ __volatile__
|
|
(
|
|
"LC0 = %8;\n\t"
|
|
"R2 = 0;\n\t"
|
|
"I0 = %6;\n\t"
|
|
"B0 = %6;\n\t"
|
|
"L0 = %9;\n\t"
|
|
"LOOP entries_loop%= LC0;\n\t"
|
|
"LOOP_BEGIN entries_loop%=;\n\t"
|
|
"%0 = [%4++];\n\t"
|
|
"%0 >>= 1;\n\t"
|
|
"A0 = %0;\n\t"
|
|
"R0.L = W[%1++%7] || R1.L = W[I0++];\n\t"
|
|
"LOOP vq_loop%= LC1 = %5;\n\t"
|
|
"LOOP_BEGIN vq_loop%=;\n\t"
|
|
"%0 = (A0 -= R0.L*R1.L) (IS) || R0.L = W[%1++%7] || R1.L = W[I0++];\n\t"
|
|
"LOOP_END vq_loop%=;\n\t"
|
|
"%0 = (A0 -= R0.L*R1.L) (IS);\n\t"
|
|
"cc = %0 < %2;\n\t"
|
|
"if cc %2 = %0;\n\t"
|
|
"if cc %3 = R2;\n\t"
|
|
"R2 += 1;\n\t"
|
|
"LOOP_END entries_loop%=;\n\t"
|
|
: "=&D" (dist), "=&a" (codebook), "=&d" (best_dist[0]), "=&d" (nbest[0]), "=&a" (E)
|
|
: "a" (len-1), "a" (in), "a" (2), "d" (entries), "d" (len<<1), "1" (codebook), "4" (E), "2" (best_dist[0]), "3" (nbest[0])
|
|
: "R0", "R1", "R2", "I0", "L0", "B0", "A0", "cc", "memory"
|
|
);
|
|
}
|
|
} else {
|
|
int i,k,used;
|
|
used = 0;
|
|
for (i=0;i<entries;i++)
|
|
{
|
|
spx_word32_t dist;
|
|
__asm__
|
|
(
|
|
"%0 >>= 1;\n\t"
|
|
"A0 = %0;\n\t"
|
|
"I0 = %3;\n\t"
|
|
"L0 = 0;\n\t"
|
|
"R0.L = W[%1++%4] || R1.L = W[I0++];\n\t"
|
|
"LOOP vq_loop%= LC0 = %2;\n\t"
|
|
"LOOP_BEGIN vq_loop%=;\n\t"
|
|
"%0 = (A0 -= R0.L*R1.L) (IS) || R0.L = W[%1++%4] || R1.L = W[I0++];\n\t"
|
|
"LOOP_END vq_loop%=;\n\t"
|
|
"%0 = (A0 -= R0.L*R1.L) (IS);\n\t"
|
|
: "=D" (dist), "=a" (codebook)
|
|
: "a" (len-1), "a" (in), "a" (2), "1" (codebook), "0" (E[i])
|
|
: "R0", "R1", "I0", "L0", "A0"
|
|
);
|
|
if (i<N || dist<best_dist[N-1])
|
|
{
|
|
for (k=N-1; (k >= 1) && (k > used || dist < best_dist[k-1]); k--)
|
|
{
|
|
best_dist[k]=best_dist[k-1];
|
|
nbest[k] = nbest[k-1];
|
|
}
|
|
best_dist[k]=dist;
|
|
nbest[k]=i;
|
|
used++;
|
|
}
|
|
}
|
|
}
|
|
}
|