1 /* Copyright (C) 2005 Analog Devices */ 2 /** 3 @author Jean-Marc Valin 4 @file cb_search_bfin.h 5 @brief Fixed codebook functions (Blackfin version) 6 */ 7 /* 8 Redistribution and use in source and binary forms, with or without 9 modification, are permitted provided that the following conditions 10 are met: 11 12 - Redistributions of source code must retain the above copyright 13 notice, this list of conditions and the following disclaimer. 14 15 - Redistributions in binary form must reproduce the above copyright 16 notice, this list of conditions and the following disclaimer in the 17 documentation and/or other materials provided with the distribution. 18 19 - Neither the name of the Xiph.org Foundation nor the names of its 20 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_COMPUTE_WEIGHTED_CODEBOOK 37 void compute_weighted_codebook(const signed char *shape_cb, const spx_word16_t *r, spx_word16_t *resp, spx_word16_t *resp2, spx_word32_t *E, int shape_cb_size, int subvect_size, char *stack) 38 { 39 int i; 40 for (i=0;i<shape_cb_size;i++) 41 { 42 __asm__ __volatile__ ( 43 "P0 = %0;\n\t" 44 "LC0 = P0;\n\t" 45 "P1 = %1;\n\t" 46 "P2 = %2;\n\t" 47 "P3 = %3;\n\t" 48 "P0 = 1;\n\t" 49 "L0 = 0;\n\t" 50 "L1 = 0;\n\t" 51 "R2 = 0;\n\t" 52 "A1 = 0;\n\t" 53 "LOOP outter%= LC0;\n\t" 54 "LOOP_BEGIN outter%=;\n\t" 55 "A0 = 0;\n\t" 56 "P4 = P1;\n\t" 57 "I1 = P2;\n\t" 58 "R0 = B[P4++] (X) || R1.L = W[I1--];\n\t" 59 "LOOP inner%= LC1 = P0;\n\t" 60 "LOOP_BEGIN inner%=;\n\t" 61 "A0 += R0.L*R1.L (IS) || R0 = B[P4++] (X) || R1.L = W[I1--];\n\t" 62 "LOOP_END inner%=;\n\t" 63 "R0 = A0;\n\t" 64 "R0 >>>= 13;\n\t" 65 "A1 += R0.L*R0.L (IS);\n\t" 66 "W[P3++] = R0;\n\t" 67 "P0 += 1;\n\t" 68 "P2 += 2;\n\t" 69 "LOOP_END outter%=;\n\t" 70 "P4 = %4;\n\t" 71 "R1 = A1;\n\t" 72 "[P4] = R1;\n\t" 73 : 74 : "m" (subvect_size), "m" (shape_cb), "m" (r), "m" (resp), "m" (E) 75 : "A0", "P0", "P1", "P2", "P3", "P4", "R0", "R1", "R2", "I0", "I1", "L0", 76 "L1", "A0", "A1", "memory" 77 #if !(__GNUC__ == 3) 78 , "LC0", "LC1" /* gcc 3.4 doesn't know about LC registers */ 79 #endif 80 ); 81 shape_cb += subvect_size; 82 resp += subvect_size; 83 E++; 84 } 85 } 86 87 #define OVERRIDE_TARGET_UPDATE 88 static inline void target_update(spx_word16_t *t, spx_word16_t g, spx_word16_t *r, int len) 89 { 90 if (!len) 91 return; 92 __asm__ __volatile__ 93 ( 94 "I0 = %0;\n\t" 95 "I1 = %1;\n\t" 96 "L0 = 0;\n\t" 97 "L1 = 0;\n\t" 98 "R2 = 4096;\n\t" 99 "LOOP tupdate%= LC0 = %3;\n\t" 100 "LOOP_BEGIN tupdate%=;\n\t" 101 "R0.L = W[I0] || R1.L = W[I1++];\n\t" 102 "R1 = (A1 = R1.L*%2.L) (IS);\n\t" 103 "R1 = R1 + R2;\n\t" 104 "R1 >>>= 13;\n\t" 105 "R0.L = R0.L - R1.L;\n\t" 106 "W[I0++] = R0.L;\n\t" 107 "LOOP_END tupdate%=;\n\t" 108 : 109 : "a" (t), "a" (r), "d" (g), "a" (len) 110 : "R0", "R1", "R2", "A1", "I0", "I1", "L0", "L1" 111 ); 112 } 113
