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121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/* Copyright (C) 2004 Jean-Marc Valin */
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/**
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@file vq_sse.h
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@brief SSE-optimized vq routine
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define OVERRIDE_VQ_NBEST
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void vq_nbest(spx_word16_t *_in, const __m128 *codebook, int len, int entries, __m128 *E, int N, int *nbest, spx_word32_t *best_dist, char *stack)
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{
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int i,j,k,used;
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VARDECL(float *dist);
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VARDECL(__m128 *in);
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__m128 half;
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used = 0;
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ALLOC(dist, entries, float);
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half = _mm_set_ps1(.5f);
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ALLOC(in, len, __m128);
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for (i=0;i<len;i++)
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in[i] = _mm_set_ps1(_in[i]);
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for (i=0;i<entries>>2;i++)
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{
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__m128 d = _mm_mul_ps(E[i], half);
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for (j=0;j<len;j++)
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d = _mm_sub_ps(d, _mm_mul_ps(in[j], *codebook++));
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_mm_storeu_ps(dist+4*i, d);
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}
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for (i=0;i<entries;i++)
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{
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if (i<N || dist[i]<best_dist[N-1])
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{
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for (k=N-1; (k >= 1) && (k > used || dist[i] < best_dist[k-1]); k--)
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{
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best_dist[k]=best_dist[k-1];
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nbest[k] = nbest[k-1];
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}
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best_dist[k]=dist[i];
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nbest[k]=i;
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used++;
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}
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}
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}
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#define OVERRIDE_VQ_NBEST_SIGN
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void vq_nbest_sign(spx_word16_t *_in, const __m128 *codebook, int len, int entries, __m128 *E, int N, int *nbest, spx_word32_t *best_dist, char *stack)
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{
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int i,j,k,used;
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VARDECL(float *dist);
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VARDECL(__m128 *in);
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__m128 half;
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used = 0;
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ALLOC(dist, entries, float);
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half = _mm_set_ps1(.5f);
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ALLOC(in, len, __m128);
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for (i=0;i<len;i++)
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in[i] = _mm_set_ps1(_in[i]);
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for (i=0;i<entries>>2;i++)
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{
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__m128 d = _mm_setzero_ps();
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for (j=0;j<len;j++)
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d = _mm_add_ps(d, _mm_mul_ps(in[j], *codebook++));
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_mm_storeu_ps(dist+4*i, d);
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}
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for (i=0;i<entries;i++)
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{
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int sign;
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if (dist[i]>0)
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{
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sign=0;
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dist[i]=-dist[i];
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} else
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{
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sign=1;
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}
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dist[i] += .5f*((float*)E)[i];
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if (i<N || dist[i]<best_dist[N-1])
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{
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for (k=N-1; (k >= 1) && (k > used || dist[i] < best_dist[k-1]); k--)
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{
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best_dist[k]=best_dist[k-1];
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nbest[k] = nbest[k-1];
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}
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best_dist[k]=dist[i];
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nbest[k]=i;
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used++;
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if (sign)
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nbest[k]+=entries;
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}
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}
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}
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