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DuerOS-Light-SDK-v1.1.0/duer-os-light/external/speex/libspeex/vq_bfin.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) 2005 Analog Devices */
TMBOY 47:9e361da97763 2 /**
TMBOY 47:9e361da97763 3 @file vq_bfin.h
TMBOY 47:9e361da97763 4 @author Jean-Marc Valin
TMBOY 47:9e361da97763 5 @brief Blackfin-optimized vq routine
TMBOY 47:9e361da97763 6 */
TMBOY 47:9e361da97763 7 /*
TMBOY 47:9e361da97763 8 Redistribution and use in source and binary forms, with or without
TMBOY 47:9e361da97763 9 modification, are permitted provided that the following conditions
TMBOY 47:9e361da97763 10 are met:
TMBOY 47:9e361da97763 11
TMBOY 47:9e361da97763 12 - Redistributions of source code must retain the above copyright
TMBOY 47:9e361da97763 13 notice, this list of conditions and the following disclaimer.
TMBOY 47:9e361da97763 14
TMBOY 47:9e361da97763 15 - Redistributions in binary form must reproduce the above copyright
TMBOY 47:9e361da97763 16 notice, this list of conditions and the following disclaimer in the
TMBOY 47:9e361da97763 17 documentation and/or other materials provided with the distribution.
TMBOY 47:9e361da97763 18
TMBOY 47:9e361da97763 19 - Neither the name of the Xiph.org Foundation nor the names of its
TMBOY 47:9e361da97763 20 contributors may be used to endorse or promote products derived from
TMBOY 47:9e361da97763 21 this software without specific prior written permission.
TMBOY 47:9e361da97763 22
TMBOY 47:9e361da97763 23 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
TMBOY 47:9e361da97763 24 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
TMBOY 47:9e361da97763 25 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
TMBOY 47:9e361da97763 26 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
TMBOY 47:9e361da97763 27 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
TMBOY 47:9e361da97763 28 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
TMBOY 47:9e361da97763 29 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
TMBOY 47:9e361da97763 30 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
TMBOY 47:9e361da97763 31 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
TMBOY 47:9e361da97763 32 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
TMBOY 47:9e361da97763 33 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
TMBOY 47:9e361da97763 34 */
TMBOY 47:9e361da97763 35
TMBOY 47:9e361da97763 36 #define OVERRIDE_VQ_NBEST
TMBOY 47:9e361da97763 37 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 38 {
TMBOY 47:9e361da97763 39 if (N==1)
TMBOY 47:9e361da97763 40 {
TMBOY 47:9e361da97763 41 best_dist[0] = 2147483647;
TMBOY 47:9e361da97763 42 {
TMBOY 47:9e361da97763 43 spx_word32_t dist;
TMBOY 47:9e361da97763 44 __asm__ __volatile__
TMBOY 47:9e361da97763 45 (
TMBOY 47:9e361da97763 46 "LC0 = %8;\n\t"
TMBOY 47:9e361da97763 47 "R2 = 0;\n\t"
TMBOY 47:9e361da97763 48 "I0 = %6;\n\t"
TMBOY 47:9e361da97763 49 "B0 = %6;\n\t"
TMBOY 47:9e361da97763 50 "L0 = %9;\n\t"
TMBOY 47:9e361da97763 51 "LOOP entries_loop%= LC0;\n\t"
TMBOY 47:9e361da97763 52 "LOOP_BEGIN entries_loop%=;\n\t"
TMBOY 47:9e361da97763 53 "%0 = [%4++];\n\t"
TMBOY 47:9e361da97763 54 "%0 >>= 1;\n\t"
TMBOY 47:9e361da97763 55 "A0 = %0;\n\t"
TMBOY 47:9e361da97763 56 "R0.L = W[%1++%7] || R1.L = W[I0++];\n\t"
TMBOY 47:9e361da97763 57 "LOOP vq_loop%= LC1 = %5;\n\t"
TMBOY 47:9e361da97763 58 "LOOP_BEGIN vq_loop%=;\n\t"
TMBOY 47:9e361da97763 59 "%0 = (A0 -= R0.L*R1.L) (IS) || R0.L = W[%1++%7] || R1.L = W[I0++];\n\t"
TMBOY 47:9e361da97763 60 "LOOP_END vq_loop%=;\n\t"
TMBOY 47:9e361da97763 61 "%0 = (A0 -= R0.L*R1.L) (IS);\n\t"
TMBOY 47:9e361da97763 62 "cc = %0 < %2;\n\t"
TMBOY 47:9e361da97763 63 "if cc %2 = %0;\n\t"
TMBOY 47:9e361da97763 64 "if cc %3 = R2;\n\t"
TMBOY 47:9e361da97763 65 "R2 += 1;\n\t"
TMBOY 47:9e361da97763 66 "LOOP_END entries_loop%=;\n\t"
TMBOY 47:9e361da97763 67 : "=&D" (dist), "=&a" (codebook), "=&d" (best_dist[0]), "=&d" (nbest[0]), "=&a" (E)
TMBOY 47:9e361da97763 68 : "a" (len-1), "a" (in), "a" (2), "d" (entries), "d" (len<<1), "1" (codebook), "4" (E), "2" (best_dist[0]), "3" (nbest[0])
TMBOY 47:9e361da97763 69 : "R0", "R1", "R2", "I0", "L0", "B0", "A0", "cc", "memory"
TMBOY 47:9e361da97763 70 );
TMBOY 47:9e361da97763 71 }
TMBOY 47:9e361da97763 72 } else {
TMBOY 47:9e361da97763 73 int i,k,used;
TMBOY 47:9e361da97763 74 used = 0;
TMBOY 47:9e361da97763 75 for (i=0;i<entries;i++)
TMBOY 47:9e361da97763 76 {
TMBOY 47:9e361da97763 77 spx_word32_t dist;
TMBOY 47:9e361da97763 78 __asm__
TMBOY 47:9e361da97763 79 (
TMBOY 47:9e361da97763 80 "%0 >>= 1;\n\t"
TMBOY 47:9e361da97763 81 "A0 = %0;\n\t"
TMBOY 47:9e361da97763 82 "I0 = %3;\n\t"
TMBOY 47:9e361da97763 83 "L0 = 0;\n\t"
TMBOY 47:9e361da97763 84 "R0.L = W[%1++%4] || R1.L = W[I0++];\n\t"
TMBOY 47:9e361da97763 85 "LOOP vq_loop%= LC0 = %2;\n\t"
TMBOY 47:9e361da97763 86 "LOOP_BEGIN vq_loop%=;\n\t"
TMBOY 47:9e361da97763 87 "%0 = (A0 -= R0.L*R1.L) (IS) || R0.L = W[%1++%4] || R1.L = W[I0++];\n\t"
TMBOY 47:9e361da97763 88 "LOOP_END vq_loop%=;\n\t"
TMBOY 47:9e361da97763 89 "%0 = (A0 -= R0.L*R1.L) (IS);\n\t"
TMBOY 47:9e361da97763 90 : "=D" (dist), "=a" (codebook)
TMBOY 47:9e361da97763 91 : "a" (len-1), "a" (in), "a" (2), "1" (codebook), "0" (E[i])
TMBOY 47:9e361da97763 92 : "R0", "R1", "I0", "L0", "A0"
TMBOY 47:9e361da97763 93 );
TMBOY 47:9e361da97763 94 if (i<N || dist<best_dist[N-1])
TMBOY 47:9e361da97763 95 {
TMBOY 47:9e361da97763 96 for (k=N-1; (k >= 1) && (k > used || dist < best_dist[k-1]); k--)
TMBOY 47:9e361da97763 97 {
TMBOY 47:9e361da97763 98 best_dist[k]=best_dist[k-1];
TMBOY 47:9e361da97763 99 nbest[k] = nbest[k-1];
TMBOY 47:9e361da97763 100 }
TMBOY 47:9e361da97763 101 best_dist[k]=dist;
TMBOY 47:9e361da97763 102 nbest[k]=i;
TMBOY 47:9e361da97763 103 used++;
TMBOY 47:9e361da97763 104 }
TMBOY 47:9e361da97763 105 }
TMBOY 47:9e361da97763 106 }
TMBOY 47:9e361da97763 107 }