138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/***************************************************************************
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Copyright (c) 2014, The OpenBLAS Project
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All rights reserved.
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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 are
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met:
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1. 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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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. Neither the name of the OpenBLAS project nor the names of
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its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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#include "common.h"
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#include "../simd/intrin.h"
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#if defined(DSDOT)
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double CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
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#else
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FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
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#endif
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{
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BLASLONG i=0;
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BLASLONG ix=0,iy=0;
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#if defined(DSDOT)
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double dot = 0.0 ;
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#else
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FLOAT dot = 0.0 ;
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#endif
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if ( n < 1 ) return(dot);
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if ( (inc_x == 1) && (inc_y == 1) )
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{
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#if V_SIMD && !defined(DSDOT)
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const int vstep = v_nlanes_f32;
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const int unrollx4 = n & (-vstep * 4);
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const int unrollx = n & -vstep;
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v_f32 vsum0 = v_zero_f32();
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v_f32 vsum1 = v_zero_f32();
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v_f32 vsum2 = v_zero_f32();
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v_f32 vsum3 = v_zero_f32();
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while(i < unrollx4)
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{
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vsum0 = v_muladd_f32(
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v_loadu_f32(x + i), v_loadu_f32(y + i), vsum0
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);
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vsum1 = v_muladd_f32(
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v_loadu_f32(x + i + vstep), v_loadu_f32(y + i + vstep), vsum1
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);
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vsum2 = v_muladd_f32(
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v_loadu_f32(x + i + vstep*2), v_loadu_f32(y + i + vstep*2), vsum2
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);
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vsum3 = v_muladd_f32(
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v_loadu_f32(x + i + vstep*3), v_loadu_f32(y + i + vstep*3), vsum3
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);
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i += vstep*4;
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}
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vsum0 = v_add_f32(
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v_add_f32(vsum0, vsum1), v_add_f32(vsum2 , vsum3)
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);
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while(i < unrollx)
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{
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vsum0 = v_muladd_f32(
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v_loadu_f32(x + i), v_loadu_f32(y + i), vsum0
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);
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i += vstep;
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}
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dot = v_sum_f32(vsum0);
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#elif defined(DSDOT)
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int n1 = n & -4;
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for (; i < n1; i += 4)
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{
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dot += (double) y[i] * (double) x[i]
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+ (double) y[i+1] * (double) x[i+1]
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+ (double) y[i+2] * (double) x[i+2]
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+ (double) y[i+3] * (double) x[i+3] ;
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}
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#else
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int n1 = n & -4;
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for (; i < n1; i += 4)
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{
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dot += y[i] * x[i]
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+ y[i+1] * x[i+1]
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+ y[i+2] * x[i+2]
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+ y[i+3] * x[i+3] ;
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}
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#endif
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while(i < n)
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{
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#if defined(DSDOT)
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dot += (double) y[i] * (double) x[i] ;
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#else
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dot += y[i] * x[i] ;
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#endif
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i++ ;
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}
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return(dot);
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}
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while(i < n)
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{
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#if defined(DSDOT)
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dot += (double) y[iy] * (double) x[ix] ;
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#else
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dot += y[iy] * x[ix] ;
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#endif
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ix += inc_x ;
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iy += inc_y ;
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i++ ;
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}
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return(dot);
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}
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