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cb_search_sse.h

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00001 /* Copyright (C) 2004 Jean-Marc Valin 
00002    File: cb_search.c (SSE version)
00003 
00004    Redistribution and use in source and binary forms, with or without
00005    modification, are permitted provided that the following conditions
00006    are met:
00007    
00008    - Redistributions of source code must retain the above copyright
00009    notice, this list of conditions and the following disclaimer.
00010    
00011    - Redistributions in binary form must reproduce the above copyright
00012    notice, this list of conditions and the following disclaimer in the
00013    documentation and/or other materials provided with the distribution.
00014    
00015    - Neither the name of the Xiph.org Foundation nor the names of its
00016    contributors may be used to endorse or promote products derived from
00017    this software without specific prior written permission.
00018    
00019    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00020    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00021    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00022    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
00023    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00024    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00025    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00026    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00027    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00028    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00029    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030 */
00031 
00032 #include <xmmintrin.h>
00033 
00034 static inline void _spx_mm_getr_ps (__m128 U, float *__Z, float *__Y, float *__X, float *__W)
00035 {
00036   union {
00037     float __a[4];
00038     __m128 __v;
00039   } __u;
00040   
00041   __u.__v = U;
00042 
00043   *__Z = __u.__a[0];
00044   *__Y = __u.__a[1];
00045   *__X = __u.__a[2];
00046   *__W = __u.__a[3];
00047 
00048 }
00049 
00050 
00051 static void compute_weighted_codebook(const signed char *shape_cb, const spx_sig_t *_r, float *resp, __m128 *resp2, __m128 *E, int shape_cb_size, int subvect_size, char *stack)
00052 {
00053    int i, j, k;
00054    __m128 resj, EE;
00055    __m128 *r, *shape;
00056    r = PUSH(stack, subvect_size, __m128);
00057    shape = PUSH(stack, subvect_size, __m128);
00058    for(j=0;j<subvect_size;j++)
00059       r[j] = _mm_load_ps1(_r+j);
00060    for (i=0;i<shape_cb_size;i+=4)
00061    {
00062       float *_res = resp+i*subvect_size;
00063       const signed char *_shape = shape_cb+i*subvect_size;
00064       EE = _mm_setzero_ps();
00065       for(j=0;j<subvect_size;j++)
00066       {
00067          shape[j] = _mm_setr_ps(0.03125*_shape[j], 0.03125*_shape[subvect_size+j], 0.03125*_shape[2*subvect_size+j], 0.03125*_shape[3*subvect_size+j]);
00068       }
00069       for(j=0;j<subvect_size;j++)
00070       {
00071          resj = _mm_setzero_ps();
00072          for (k=0;k<=j;k++)
00073             resj = _mm_add_ps(resj, _mm_mul_ps(shape[k],r[j-k]));
00074          _spx_mm_getr_ps(resj, _res+j, _res+subvect_size+j, _res+2*subvect_size+j, _res+3*subvect_size+j);
00075          *resp2++ = resj;
00076          EE = _mm_add_ps(EE, _mm_mul_ps(resj, resj));
00077       }
00078       E[i>>2] = EE;
00079    }
00080 }

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