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Diffstat (limited to 'src/libspeex/vq_bfin.h')
| -rw-r--r-- | src/libspeex/vq_bfin.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/libspeex/vq_bfin.h b/src/libspeex/vq_bfin.h new file mode 100644 index 0000000..2cc9ea5 --- /dev/null +++ b/src/libspeex/vq_bfin.h @@ -0,0 +1,107 @@ +/* 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++; + } + } + } +} |