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