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DuerOS-Light-SDK-v1.1.0/duer-os-light/external/speex/libspeex/vq_arm4.h@47:9e361da97763, 2017-07-18 (annotated)

Committer:
TMBOY
Date:
Tue Jul 18 16:54:45 2017 +0800
Revision:
47:9e361da97763
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TMBOY 47:9e361da97763 1 /* Copyright (C) 2004 Jean-Marc Valin */
TMBOY 47:9e361da97763 2 /**
TMBOY 47:9e361da97763 3 @file vq_arm4.h
TMBOY 47:9e361da97763 4 @brief ARM4-optimized vq routine
TMBOY 47:9e361da97763 5 */
TMBOY 47:9e361da97763 6 /*
TMBOY 47:9e361da97763 7 Redistribution and use in source and binary forms, with or without
TMBOY 47:9e361da97763 8 modification, are permitted provided that the following conditions
TMBOY 47:9e361da97763 9 are met:
TMBOY 47:9e361da97763 10
TMBOY 47:9e361da97763 11 - Redistributions of source code must retain the above copyright
TMBOY 47:9e361da97763 12 notice, this list of conditions and the following disclaimer.
TMBOY 47:9e361da97763 13
TMBOY 47:9e361da97763 14 - Redistributions in binary form must reproduce the above copyright
TMBOY 47:9e361da97763 15 notice, this list of conditions and the following disclaimer in the
TMBOY 47:9e361da97763 16 documentation and/or other materials provided with the distribution.
TMBOY 47:9e361da97763 17
TMBOY 47:9e361da97763 18 - Neither the name of the Xiph.org Foundation nor the names of its
TMBOY 47:9e361da97763 19 contributors may be used to endorse or promote products derived from
TMBOY 47:9e361da97763 20 this software without specific prior written permission.
TMBOY 47:9e361da97763 21
TMBOY 47:9e361da97763 22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
TMBOY 47:9e361da97763 23 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
TMBOY 47:9e361da97763 24 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
TMBOY 47:9e361da97763 25 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
TMBOY 47:9e361da97763 26 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
TMBOY 47:9e361da97763 27 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
TMBOY 47:9e361da97763 28 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
TMBOY 47:9e361da97763 29 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
TMBOY 47:9e361da97763 30 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
TMBOY 47:9e361da97763 31 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
TMBOY 47:9e361da97763 32 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
TMBOY 47:9e361da97763 33 */
TMBOY 47:9e361da97763 34
TMBOY 47:9e361da97763 35 #define OVERRIDE_VQ_NBEST
TMBOY 47:9e361da97763 36 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)
TMBOY 47:9e361da97763 37 {
TMBOY 47:9e361da97763 38 int i,j;
TMBOY 47:9e361da97763 39 for (i=0;i<entries;i+=4)
TMBOY 47:9e361da97763 40 {
TMBOY 47:9e361da97763 41 #if 1
TMBOY 47:9e361da97763 42 spx_word32_t dist1, dist2, dist3, dist4;
TMBOY 47:9e361da97763 43 int dead1, dead2, dead3, dead4, dead5, dead6, dead7, dead8;
TMBOY 47:9e361da97763 44 __asm__ __volatile__ (
TMBOY 47:9e361da97763 45 "mov %0, #0 \n\t"
TMBOY 47:9e361da97763 46 "mov %1, #0 \n\t"
TMBOY 47:9e361da97763 47 "mov %2, #0 \n\t"
TMBOY 47:9e361da97763 48 "mov %3, #0 \n\t"
TMBOY 47:9e361da97763 49 "mov %10, %4 \n\t"
TMBOY 47:9e361da97763 50 "add %4, %4, %4\n\t"
TMBOY 47:9e361da97763 51 ".vqloop%=:\n\t"
TMBOY 47:9e361da97763 52 "ldrsh %7, [%5], #2 \n\t"
TMBOY 47:9e361da97763 53 "ldrsh %8, [%6] \n\t"
TMBOY 47:9e361da97763 54 "mov %9, %6 \n\t"
TMBOY 47:9e361da97763 55 "mla %0, %7, %8, %0 \n\t"
TMBOY 47:9e361da97763 56 "ldrsh %8, [%9, %4]! \n\t"
TMBOY 47:9e361da97763 57 "mla %1, %7, %8, %1 \n\t"
TMBOY 47:9e361da97763 58 "ldrsh %8, [%9, %4]!\n\t"
TMBOY 47:9e361da97763 59 "mla %2, %7, %8, %2 \n\t"
TMBOY 47:9e361da97763 60 "ldrsh %8, [%9, %4]! \n\t"
TMBOY 47:9e361da97763 61 "mla %3, %7, %8, %3 \n\t"
TMBOY 47:9e361da97763 62 "subs %10, %10, #1 \n\t"
TMBOY 47:9e361da97763 63 "add %6, %6, #2 \n\t"
TMBOY 47:9e361da97763 64 "bne .vqloop%="
TMBOY 47:9e361da97763 65 : "=r" (dist1), "=r" (dist2), "=r" (dist3), "=r" (dist4),
TMBOY 47:9e361da97763 66 "=r" (dead1), "=r" (dead2), "=r" (codebook), "=r" (dead4),
TMBOY 47:9e361da97763 67 "=r" (dead5), "=r" (dead6), "=r" (dead7)
TMBOY 47:9e361da97763 68 : "4" (len), "5" (in), "6" (codebook)
TMBOY 47:9e361da97763 69 : "cc");
TMBOY 47:9e361da97763 70 #else
TMBOY 47:9e361da97763 71 dist1=dist2=dist3=dist4=0;
TMBOY 47:9e361da97763 72 /* spx_word32_t dist1=0;
TMBOY 47:9e361da97763 73 spx_word32_t dist2=0;
TMBOY 47:9e361da97763 74 spx_word32_t dist3=0;
TMBOY 47:9e361da97763 75 spx_word32_t dist4=0;*/
TMBOY 47:9e361da97763 76 for (j=0;j<2;j++)
TMBOY 47:9e361da97763 77 {
TMBOY 47:9e361da97763 78 const spx_word16_t *code = codebook;
TMBOY 47:9e361da97763 79 dist1 = MAC16_16(dist1,in[j],*code);
TMBOY 47:9e361da97763 80 code += len;
TMBOY 47:9e361da97763 81 dist2 = MAC16_16(dist2,in[j],*code);
TMBOY 47:9e361da97763 82 code += len;
TMBOY 47:9e361da97763 83 dist3 = MAC16_16(dist3,in[j],*code);
TMBOY 47:9e361da97763 84 code += len;
TMBOY 47:9e361da97763 85 dist4 = MAC16_16(dist4,in[j],*code);
TMBOY 47:9e361da97763 86 codebook++;
TMBOY 47:9e361da97763 87 }
TMBOY 47:9e361da97763 88 #endif
TMBOY 47:9e361da97763 89 dist1=SUB32(SHR(*E++,1),dist1);
TMBOY 47:9e361da97763 90 if (dist1<*best_dist || i==0)
TMBOY 47:9e361da97763 91 {
TMBOY 47:9e361da97763 92 *best_dist=dist1;
TMBOY 47:9e361da97763 93 *nbest=i;
TMBOY 47:9e361da97763 94 }
TMBOY 47:9e361da97763 95 dist2=SUB32(SHR(*E++,1),dist2);
TMBOY 47:9e361da97763 96 if (dist2<*best_dist)
TMBOY 47:9e361da97763 97 {
TMBOY 47:9e361da97763 98 *best_dist=dist2;
TMBOY 47:9e361da97763 99 *nbest=i+1;
TMBOY 47:9e361da97763 100 }
TMBOY 47:9e361da97763 101 dist3=SUB32(SHR(*E++,1),dist3);
TMBOY 47:9e361da97763 102 if (dist3<*best_dist)
TMBOY 47:9e361da97763 103 {
TMBOY 47:9e361da97763 104 *best_dist=dist3;
TMBOY 47:9e361da97763 105 *nbest=i+2;
TMBOY 47:9e361da97763 106 }
TMBOY 47:9e361da97763 107 dist4=SUB32(SHR(*E++,1),dist4);
TMBOY 47:9e361da97763 108 if (dist4<*best_dist)
TMBOY 47:9e361da97763 109 {
TMBOY 47:9e361da97763 110 *best_dist=dist4;
TMBOY 47:9e361da97763 111 *nbest=i+3;
TMBOY 47:9e361da97763 112 }
TMBOY 47:9e361da97763 113 codebook += 3*len;
TMBOY 47:9e361da97763 114 }
TMBOY 47:9e361da97763 115 }