| /* Copyright (C) 2004 Jean-Marc Valin */ |
| /** |
| @file ltp_arm4.h |
| @brief Long-Term Prediction functions (ARM4 version) |
| */ |
| /* |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| |
| - Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| |
| - Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| |
| - Neither the name of the Xiph.org Foundation nor the names of its |
| contributors may be used to endorse or promote products derived from |
| this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #define OVERRIDE_INNER_PROD |
| spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len) |
| { |
| spx_word32_t sum1=0,sum2=0; |
| spx_word16_t *deadx, *deady; |
| int deadlen, dead1, dead2, dead3, dead4, dead5, dead6; |
| __asm__ __volatile__ ( |
| "\tldrsh %5, [%0], #2 \n" |
| "\tldrsh %6, [%1], #2 \n" |
| ".inner_prod_loop%=:\n" |
| "\tsub %7, %7, %7\n" |
| "\tsub %10, %10, %10\n" |
| |
| "\tldrsh %8, [%0], #2 \n" |
| "\tldrsh %9, [%1], #2 \n" |
| "\tmla %7, %5, %6, %7\n" |
| "\tldrsh %5, [%0], #2 \n" |
| "\tldrsh %6, [%1], #2 \n" |
| "\tmla %10, %8, %9, %10\n" |
| "\tldrsh %8, [%0], #2 \n" |
| "\tldrsh %9, [%1], #2 \n" |
| "\tmla %7, %5, %6, %7\n" |
| "\tldrsh %5, [%0], #2 \n" |
| "\tldrsh %6, [%1], #2 \n" |
| "\tmla %10, %8, %9, %10\n" |
| |
| "\tldrsh %8, [%0], #2 \n" |
| "\tldrsh %9, [%1], #2 \n" |
| "\tmla %7, %5, %6, %7\n" |
| "\tldrsh %5, [%0], #2 \n" |
| "\tldrsh %6, [%1], #2 \n" |
| "\tmla %10, %8, %9, %10\n" |
| "\tldrsh %8, [%0], #2 \n" |
| "\tldrsh %9, [%1], #2 \n" |
| "\tmla %7, %5, %6, %7\n" |
| "\tldrsh %5, [%0], #2 \n" |
| "\tldrsh %6, [%1], #2 \n" |
| "\tmla %10, %8, %9, %10\n" |
| |
| "\tsubs %4, %4, #1\n" |
| "\tadd %2, %2, %7, asr #5\n" |
| "\tadd %3, %3, %10, asr #5\n" |
| "\tbne .inner_prod_loop%=\n" |
| : "=r" (deadx), "=r" (deady), "+r" (sum1), "+r" (sum2), |
| "=r" (deadlen), "=r" (dead1), "=r" (dead2), "=r" (dead3), |
| "=r" (dead4), "=r" (dead5), "=r" (dead6) |
| : "0" (x), "1" (y), "4" (len>>3) |
| : "cc" |
| ); |
| return (sum1+sum2)>>1; |
| } |
| |
| #define OVERRIDE_PITCH_XCORR |
| void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack) |
| { |
| int i,j; |
| for (i=0;i<nb_pitch;i+=4) |
| { |
| /* Compute correlation*/ |
| //corr[nb_pitch-1-i]=inner_prod(x, _y+i, len); |
| spx_word32_t sum1=0; |
| spx_word32_t sum2=0; |
| spx_word32_t sum3=0; |
| spx_word32_t sum4=0; |
| const spx_word16_t *y = _y+i; |
| const spx_word16_t *x = _x; |
| spx_word32_t y0, y1, y2, y3; |
| y0=*y++; |
| y1=*y++; |
| y2=*y++; |
| y3=*y++; |
| for (j=0;j<len;j+=4) |
| { |
| spx_word32_t part1, part2, part3, part4, x0; |
| spx_word32_t dead1; |
| __asm__ __volatile__ ( |
| #ifdef SHORTCUTS |
| "\tldrsh %10, [%8], #4 \n" |
| "\tmul %4, %10, %0 \n" |
| "\tldrsh %15, [%8], #4 \n" |
| "\tmul %5, %10, %1 \n" |
| "\tldrsh %0, [%9], #2 \n" |
| "\tmul %6, %10, %2 \n" |
| "\tldrsh %1, [%9], #2 \n" |
| "\tmul %7, %10, %3 \n" |
| |
| |
| "\tmla %4, %15, %2, %4 \n" |
| "\tldrsh %2, [%9], #2 \n" |
| "\tmla %5, %15, %3, %5 \n" |
| "\tldrsh %3, [%9], #2 \n" |
| "\tmla %6, %15, %0, %6 \n" |
| "\tmla %7, %15, %1, %7 \n" |
| |
| #else |
| "\tldrsh %10, [%8], #2 \n" |
| "\tmul %4, %10, %0 \n" |
| "\tmul %5, %10, %1 \n" |
| "\tmul %6, %10, %2 \n" |
| "\tmul %7, %10, %3 \n" |
| |
| "\tldrsh %10, [%8], #2 \n" |
| "\tldrsh %0, [%9], #2 \n" |
| "\tmla %4, %10, %1, %4 \n" |
| "\tmla %5, %10, %2, %5 \n" |
| "\tmla %6, %10, %3, %6 \n" |
| "\tmla %7, %10, %0, %7 \n" |
| |
| "\tldrsh %10, [%8], #2 \n" |
| "\tldrsh %1, [%9], #2 \n" |
| "\tmla %4, %10, %2, %4 \n" |
| "\tmla %5, %10, %3, %5 \n" |
| "\tmla %6, %10, %0, %6 \n" |
| "\tmla %7, %10, %1, %7 \n" |
| |
| "\tldrsh %10, [%8], #2 \n" |
| "\tldrsh %2, [%9], #2 \n" |
| "\tmla %4, %10, %3, %4 \n" |
| "\tmla %5, %10, %0, %5 \n" |
| "\tmla %6, %10, %1, %6 \n" |
| "\tmla %7, %10, %2, %7 \n" |
| |
| "\tldrsh %3, [%9], #2 \n" |
| #endif |
| |
| "\tldr %10, %11 \n" |
| "\tldr %15, %12 \n" |
| "\tadd %4, %10, %4, asr #6 \n" |
| "\tstr %4, %11 \n" |
| "\tldr %10, %13 \n" |
| "\tadd %5, %15, %5, asr #6 \n" |
| "\tstr %5, %12 \n" |
| "\tldr %15, %14 \n" |
| "\tadd %6, %10, %6, asr #6 \n" |
| "\tadd %7, %15, %7, asr #6 \n" |
| "\tstr %6, %13 \n" |
| "\tstr %7, %14 \n" |
| |
| : "+r" (y0), "+r" (y1), "+r" (y2), "+r" (y3), |
| "=r" (part1), "=r" (part2), "=r" (part3), "=r" (part4), |
| "+r" (x), "+r" (y), "=r" (x0), "+m" (sum1), |
| "+m" (sum2), "+m" (sum3), "+m" (sum4), "=r" (dead1) |
| : |
| : "cc", "memory" |
| ); |
| } |
| corr[nb_pitch-1-i]=sum1; |
| corr[nb_pitch-2-i]=sum2; |
| corr[nb_pitch-3-i]=sum3; |
| corr[nb_pitch-4-i]=sum4; |
| } |
| |
| } |