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Diffstat (limited to 'code/libspeex/vq_arm4.h')
| -rw-r--r-- | code/libspeex/vq_arm4.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/code/libspeex/vq_arm4.h b/code/libspeex/vq_arm4.h new file mode 100644 index 0000000..585b861 --- /dev/null +++ b/code/libspeex/vq_arm4.h @@ -0,0 +1,115 @@ +/* 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; + } +} |