1 /* Copyright (C) 2004 Jean-Marc Valin */ 2 /** 3 @file ltp_arm4.h 4 @brief Long-Term Prediction functions (ARM4 version) 5 */ 6 /* 7 Redistribution and use in source and binary forms, with or without 8 modification, are permitted provided that the following conditions 9 are met: 10 11 - Redistributions of source code must retain the above copyright 12 notice, this list of conditions and the following disclaimer. 13 14 - Redistributions in binary form must reproduce the above copyright 15 notice, this list of conditions and the following disclaimer in the 16 documentation and/or other materials provided with the distribution. 17 18 - Neither the name of the Xiph.org Foundation nor the names of its 19 contributors may be used to endorse or promote products derived from 20 this software without specific prior written permission. 21 22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 25 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 26 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 27 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 29 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 30 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 31 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 32 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #define OVERRIDE_INNER_PROD 36 spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len) 37 { 38 spx_word32_t sum1=0,sum2=0; 39 spx_word16_t *deadx, *deady; 40 int deadlen, dead1, dead2, dead3, dead4, dead5, dead6; 41 __asm__ __volatile__ ( 42 "\tldrsh %5, [%0], #2 \n" 43 "\tldrsh %6, [%1], #2 \n" 44 ".inner_prod_loop%=:\n" 45 "\tsub %7, %7, %7\n" 46 "\tsub %10, %10, %10\n" 47 48 "\tldrsh %8, [%0], #2 \n" 49 "\tldrsh %9, [%1], #2 \n" 50 "\tmla %7, %5, %6, %7\n" 51 "\tldrsh %5, [%0], #2 \n" 52 "\tldrsh %6, [%1], #2 \n" 53 "\tmla %10, %8, %9, %10\n" 54 "\tldrsh %8, [%0], #2 \n" 55 "\tldrsh %9, [%1], #2 \n" 56 "\tmla %7, %5, %6, %7\n" 57 "\tldrsh %5, [%0], #2 \n" 58 "\tldrsh %6, [%1], #2 \n" 59 "\tmla %10, %8, %9, %10\n" 60 61 "\tldrsh %8, [%0], #2 \n" 62 "\tldrsh %9, [%1], #2 \n" 63 "\tmla %7, %5, %6, %7\n" 64 "\tldrsh %5, [%0], #2 \n" 65 "\tldrsh %6, [%1], #2 \n" 66 "\tmla %10, %8, %9, %10\n" 67 "\tldrsh %8, [%0], #2 \n" 68 "\tldrsh %9, [%1], #2 \n" 69 "\tmla %7, %5, %6, %7\n" 70 "\tldrsh %5, [%0], #2 \n" 71 "\tldrsh %6, [%1], #2 \n" 72 "\tmla %10, %8, %9, %10\n" 73 74 "\tsubs %4, %4, #1\n" 75 "\tadd %2, %2, %7, asr #5\n" 76 "\tadd %3, %3, %10, asr #5\n" 77 "\tbne .inner_prod_loop%=\n" 78 : "=r" (deadx), "=r" (deady), "+r" (sum1), "+r" (sum2), 79 "=r" (deadlen), "=r" (dead1), "=r" (dead2), "=r" (dead3), 80 "=r" (dead4), "=r" (dead5), "=r" (dead6) 81 : "0" (x), "1" (y), "4" (len>>3) 82 : "cc" 83 ); 84 return (sum1+sum2)>>1; 85 } 86 87 #define OVERRIDE_PITCH_XCORR 88 void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack) 89 { 90 int i,j; 91 for (i=0;i<nb_pitch;i+=4) 92 { 93 /* Compute correlation*/ 94 //corr[nb_pitch-1-i]=inner_prod(x, _y+i, len); 95 spx_word32_t sum1=0; 96 spx_word32_t sum2=0; 97 spx_word32_t sum3=0; 98 spx_word32_t sum4=0; 99 const spx_word16_t *y = _y+i; 100 const spx_word16_t *x = _x; 101 spx_word32_t y0, y1, y2, y3; 102 y0=*y++; 103 y1=*y++; 104 y2=*y++; 105 y3=*y++; 106 for (j=0;j<len;j+=4) 107 { 108 spx_word32_t part1, part2, part3, part4, x0; 109 spx_word32_t dead1; 110 __asm__ __volatile__ ( 111 #ifdef SHORTCUTS 112 "\tldrsh %10, [%8], #4 \n" 113 "\tmul %4, %10, %0 \n" 114 "\tldrsh %15, [%8], #4 \n" 115 "\tmul %5, %10, %1 \n" 116 "\tldrsh %0, [%9], #2 \n" 117 "\tmul %6, %10, %2 \n" 118 "\tldrsh %1, [%9], #2 \n" 119 "\tmul %7, %10, %3 \n" 120 121 122 "\tmla %4, %15, %2, %4 \n" 123 "\tldrsh %2, [%9], #2 \n" 124 "\tmla %5, %15, %3, %5 \n" 125 "\tldrsh %3, [%9], #2 \n" 126 "\tmla %6, %15, %0, %6 \n" 127 "\tmla %7, %15, %1, %7 \n" 128 129 #else 130 "\tldrsh %10, [%8], #2 \n" 131 "\tmul %4, %10, %0 \n" 132 "\tmul %5, %10, %1 \n" 133 "\tmul %6, %10, %2 \n" 134 "\tmul %7, %10, %3 \n" 135 136 "\tldrsh %10, [%8], #2 \n" 137 "\tldrsh %0, [%9], #2 \n" 138 "\tmla %4, %10, %1, %4 \n" 139 "\tmla %5, %10, %2, %5 \n" 140 "\tmla %6, %10, %3, %6 \n" 141 "\tmla %7, %10, %0, %7 \n" 142 143 "\tldrsh %10, [%8], #2 \n" 144 "\tldrsh %1, [%9], #2 \n" 145 "\tmla %4, %10, %2, %4 \n" 146 "\tmla %5, %10, %3, %5 \n" 147 "\tmla %6, %10, %0, %6 \n" 148 "\tmla %7, %10, %1, %7 \n" 149 150 "\tldrsh %10, [%8], #2 \n" 151 "\tldrsh %2, [%9], #2 \n" 152 "\tmla %4, %10, %3, %4 \n" 153 "\tmla %5, %10, %0, %5 \n" 154 "\tmla %6, %10, %1, %6 \n" 155 "\tmla %7, %10, %2, %7 \n" 156 157 "\tldrsh %3, [%9], #2 \n" 158 #endif 159 160 "\tldr %10, %11 \n" 161 "\tldr %15, %12 \n" 162 "\tadd %4, %10, %4, asr #6 \n" 163 "\tstr %4, %11 \n" 164 "\tldr %10, %13 \n" 165 "\tadd %5, %15, %5, asr #6 \n" 166 "\tstr %5, %12 \n" 167 "\tldr %15, %14 \n" 168 "\tadd %6, %10, %6, asr #6 \n" 169 "\tadd %7, %15, %7, asr #6 \n" 170 "\tstr %6, %13 \n" 171 "\tstr %7, %14 \n" 172 173 : "+r" (y0), "+r" (y1), "+r" (y2), "+r" (y3), 174 "=r" (part1), "=r" (part2), "=r" (part3), "=r" (part4), 175 "+r" (x), "+r" (y), "=r" (x0), "+m" (sum1), 176 "+m" (sum2), "+m" (sum3), "+m" (sum4), "=r" (dead1) 177 : 178 : "cc", "memory" 179 ); 180 } 181 corr[nb_pitch-1-i]=sum1; 182 corr[nb_pitch-2-i]=sum2; 183 corr[nb_pitch-3-i]=sum3; 184 corr[nb_pitch-4-i]=sum4; 185 } 186 187 } 188
