vq_bfin.h revision 98913fed6520d8849fb2e246be943e04474aefa4
12c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha/* Copyright (C) 2005 Analog Devices */ 22c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha/** 32c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha @file vq_bfin.h 42c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha @author Jean-Marc Valin 52c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha @brief Blackfin-optimized vq routine 62c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha*/ 72c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha/* 82c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha Redistribution and use in source and binary forms, with or without 92c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha modification, are permitted provided that the following conditions 102c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha are met: 112c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha 122c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha - Redistributions of source code must retain the above copyright 132c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha notice, this list of conditions and the following disclaimer. 142c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha 152c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha - Redistributions in binary form must reproduce the above copyright 162c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha notice, this list of conditions and the following disclaimer in the 172c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha documentation and/or other materials provided with the distribution. 182c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha 192c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha - Neither the name of the Xiph.org Foundation nor the names of its 202c94d0faa0e1c268893d5e04dc77e8a35889db00Ahmed Bougacha contributors may be used to endorse or promote products derived from 21 this software without specific prior written permission. 22 23 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 27 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 28 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 29 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34*/ 35 36#define OVERRIDE_VQ_NBEST 37void 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) 38{ 39 if (N==1) 40 { 41 best_dist[0] = 2147483647; 42 { 43 spx_word32_t dist; 44 __asm__ __volatile__ 45 ( 46 "LC0 = %8;\n\t" 47 "R2 = 0;\n\t" 48 "I0 = %6;\n\t" 49 "B0 = %6;\n\t" 50 "L0 = %9;\n\t" 51 "LOOP entries_loop%= LC0;\n\t" 52 "LOOP_BEGIN entries_loop%=;\n\t" 53 "%0 = [%4++];\n\t" 54 "%0 >>= 1;\n\t" 55 "A0 = %0;\n\t" 56 "R0.L = W[%1++%7] || R1.L = W[I0++];\n\t" 57 "LOOP vq_loop%= LC1 = %5;\n\t" 58 "LOOP_BEGIN vq_loop%=;\n\t" 59 "%0 = (A0 -= R0.L*R1.L) (IS) || R0.L = W[%1++%7] || R1.L = W[I0++];\n\t" 60 "LOOP_END vq_loop%=;\n\t" 61 "%0 = (A0 -= R0.L*R1.L) (IS);\n\t" 62 "cc = %0 < %2;\n\t" 63 "if cc %2 = %0;\n\t" 64 "if cc %3 = R2;\n\t" 65 "R2 += 1;\n\t" 66 "LOOP_END entries_loop%=;\n\t" 67 : "=&D" (dist), "=&a" (codebook), "=&d" (best_dist[0]), "=&d" (nbest[0]), "=&a" (E) 68 : "a" (len-1), "a" (in), "a" (2), "d" (entries), "d" (len<<1), "1" (codebook), "4" (E), "2" (best_dist[0]), "3" (nbest[0]) 69 : "R0", "R1", "R2", "I0", "L0", "B0", "A0", "cc", "memory" 70 ); 71 } 72 } else { 73 int i,k,used; 74 used = 0; 75 for (i=0;i<entries;i++) 76 { 77 spx_word32_t dist; 78 __asm__ 79 ( 80 "%0 >>= 1;\n\t" 81 "A0 = %0;\n\t" 82 "I0 = %3;\n\t" 83 "L0 = 0;\n\t" 84 "R0.L = W[%1++%4] || R1.L = W[I0++];\n\t" 85 "LOOP vq_loop%= LC0 = %2;\n\t" 86 "LOOP_BEGIN vq_loop%=;\n\t" 87 "%0 = (A0 -= R0.L*R1.L) (IS) || R0.L = W[%1++%4] || R1.L = W[I0++];\n\t" 88 "LOOP_END vq_loop%=;\n\t" 89 "%0 = (A0 -= R0.L*R1.L) (IS);\n\t" 90 : "=D" (dist), "=a" (codebook) 91 : "a" (len-1), "a" (in), "a" (2), "1" (codebook), "0" (E[i]) 92 : "R0", "R1", "I0", "L0", "A0" 93 ); 94 if (i<N || dist<best_dist[N-1]) 95 { 96 for (k=N-1; (k >= 1) && (k > used || dist < best_dist[k-1]); k--) 97 { 98 best_dist[k]=best_dist[k-1]; 99 nbest[k] = nbest[k-1]; 100 } 101 best_dist[k]=dist; 102 nbest[k]=i; 103 used++; 104 } 105 } 106 } 107} 108