1 /* Copyright (C) 2006 David Rowe */ 2 /** 3 @file quant_lsp_bfin.h 4 @author David Rowe 5 @brief Various compatibility routines for Speex (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_LSP_QUANT 37 #ifdef OVERRIDE_LSP_QUANT 38 39 /* 40 Note http://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html 41 well tell you all the magic resgister constraints used below 42 for gcc in-line asm. 43 */ 44 45 static int lsp_quant( 46 spx_word16_t *x, 47 const signed char *cdbk, 48 int nbVec, 49 int nbDim 50 ) 51 { 52 int j; 53 spx_word32_t best_dist=1<<30; 54 int best_id=0; 55 56 __asm__ __volatile__ 57 ( 58 " %0 = 1 (X);\n\t" /* %0: best_dist */ 59 " %0 <<= 30;\n\t" 60 " %1 = 0 (X);\n\t" /* %1: best_i */ 61 " P2 = %3\n\t" /* P2: ptr to cdbk */ 62 " R5 = 0;\n\t" /* R5: best cb entry */ 63 64 " R0 = %5;\n\t" /* set up circ addr */ 65 " R0 <<= 1;\n\t" 66 " L0 = R0;\n\t" 67 " I0 = %2;\n\t" /* %2: &x[0] */ 68 " B0 = %2;\n\t" 69 70 " R2.L = W [I0++];\n\t" 71 " LSETUP (1f, 2f) LC0 = %4;\n\t" 72 "1: R3 = 0;\n\t" /* R3: dist */ 73 " LSETUP (3f, 4f) LC1 = %5;\n\t" 74 "3: R1 = B [P2++] (X);\n\t" 75 " R1 <<= 5;\n\t" 76 " R0.L = R2.L - R1.L || R2.L = W [I0++];\n\t" 77 " R0 = R0.L*R0.L;\n\t" 78 "4: R3 = R3 + R0;\n\t" 79 80 " cc =R3<%0;\n\t" 81 " if cc %0=R3;\n\t" 82 " if cc %1=R5;\n\t" 83 "2: R5 += 1;\n\t" 84 " L0 = 0;\n\t" 85 : "=&d" (best_dist), "=&d" (best_id) 86 : "a" (x), "b" (cdbk), "a" (nbVec), "a" (nbDim) 87 : "I0", "P2", "R0", "R1", "R2", "R3", "R5", "L0", "B0", "A0" 88 ); 89 90 for (j=0;j<nbDim;j++) { 91 x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5)); 92 } 93 return best_id; 94 } 95 #endif 96 97 #define OVERRIDE_LSP_WEIGHT_QUANT 98 #ifdef OVERRIDE_LSP_WEIGHT_QUANT 99 100 /* 101 Note http://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html 102 well tell you all the magic resgister constraints used below 103 for gcc in-line asm. 104 */ 105 106 static int lsp_weight_quant( 107 spx_word16_t *x, 108 spx_word16_t *weight, 109 const signed char *cdbk, 110 int nbVec, 111 int nbDim 112 ) 113 { 114 int j; 115 spx_word32_t best_dist=1<<30; 116 int best_id=0; 117 118 __asm__ __volatile__ 119 ( 120 " %0 = 1 (X);\n\t" /* %0: best_dist */ 121 " %0 <<= 30;\n\t" 122 " %1 = 0 (X);\n\t" /* %1: best_i */ 123 " P2 = %4\n\t" /* P2: ptr to cdbk */ 124 " R5 = 0;\n\t" /* R5: best cb entry */ 125 126 " R0 = %6;\n\t" /* set up circ addr */ 127 " R0 <<= 1;\n\t" 128 " L0 = R0;\n\t" 129 " L1 = R0;\n\t" 130 " I0 = %2;\n\t" /* %2: &x[0] */ 131 " I1 = %3;\n\t" /* %3: &weight[0] */ 132 " B0 = %2;\n\t" 133 " B1 = %3;\n\t" 134 135 " LSETUP (1f, 2f) LC0 = %5;\n\t" 136 "1: R3 = 0 (X);\n\t" /* R3: dist */ 137 " LSETUP (3f, 4f) LC1 = %6;\n\t" 138 "3: R0.L = W [I0++] || R2.L = W [I1++];\n\t" 139 " R1 = B [P2++] (X);\n\t" 140 " R1 <<= 5;\n\t" 141 " R0.L = R0.L - R1.L;\n\t" 142 " R0 = R0.L*R0.L;\n\t" 143 " A1 = R2.L*R0.L (M,IS);\n\t" 144 " A1 = A1 >>> 16;\n\t" 145 " R1 = (A1 += R2.L*R0.H) (IS);\n\t" 146 "4: R3 = R3 + R1;\n\t" 147 148 " cc =R3<%0;\n\t" 149 " if cc %0=R3;\n\t" 150 " if cc %1=R5;\n\t" 151 "2: R5 += 1;\n\t" 152 " L0 = 0;\n\t" 153 " L1 = 0;\n\t" 154 : "=&d" (best_dist), "=&d" (best_id) 155 : "a" (x), "a" (weight), "b" (cdbk), "a" (nbVec), "a" (nbDim) 156 : "I0", "I1", "P2", "R0", "R1", "R2", "R3", "R5", "A1", 157 "L0", "L1", "B0", "B1" 158 ); 159 160 for (j=0;j<nbDim;j++) { 161 x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5)); 162 } 163 return best_id; 164 } 165 #endif 166
