207 lines
5.0 KiB
C
207 lines
5.0 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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#if defined(BULLDOZER)
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#include "ddot_microk_bulldozer-2.c"
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#elif defined(STEAMROLLER) || defined(EXCAVATOR)
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#include "ddot_microk_steamroller-2.c"
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#elif defined(PILEDRIVER)
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#include "ddot_microk_piledriver-2.c"
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#elif defined(NEHALEM)
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#include "ddot_microk_nehalem-2.c"
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#elif defined(HASWELL) || defined(ZEN)
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#include "ddot_microk_haswell-2.c"
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#elif defined (SKYLAKEX) || defined (COOPERLAKE) || defined (SAPPHIRERAPIDS)
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#include "ddot_microk_skylakex-2.c"
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#elif defined(SANDYBRIDGE)
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#include "ddot_microk_sandy-2.c"
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#endif
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#if !defined(DSDOT)
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#define RETURN_TYPE FLOAT
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#else
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#define RETURN_TYPE double
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#endif
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#ifndef HAVE_KERNEL_8
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static void ddot_kernel_8(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *d)
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{
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BLASLONG register i = 0;
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FLOAT dot = 0.0;
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while(i < n)
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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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+ y[i+4] * x[i+4]
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+ y[i+5] * x[i+5]
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+ y[i+6] * x[i+6]
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+ y[i+7] * x[i+7] ;
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i+=8 ;
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}
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*d += dot;
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}
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#endif
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static FLOAT dot_compute(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
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{
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BLASLONG i=0;
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BLASLONG ix=0,iy=0;
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FLOAT dot = 0.0 ;
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if ( n <= 0 ) return(dot);
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if ( (inc_x == 1) && (inc_y == 1) )
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{
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BLASLONG n1 = n & -16;
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if ( n1 )
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ddot_kernel_8(n1, x, y , &dot );
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i = n1;
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while(i < n)
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{
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dot += y[i] * x[i] ;
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i++ ;
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}
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return(dot);
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}
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FLOAT temp1 = 0.0;
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FLOAT temp2 = 0.0;
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BLASLONG n1 = n & -4;
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while(i < n1)
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{
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FLOAT m1 = y[iy] * x[ix] ;
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FLOAT m2 = y[iy+inc_y] * x[ix+inc_x] ;
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FLOAT m3 = y[iy+2*inc_y] * x[ix+2*inc_x] ;
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FLOAT m4 = y[iy+3*inc_y] * x[ix+3*inc_x] ;
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ix += inc_x*4 ;
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iy += inc_y*4 ;
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temp1 += m1+m3;
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temp2 += m2+m4;
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i+=4 ;
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}
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while(i < n)
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{
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temp1 += y[iy] * x[ix] ;
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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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dot = temp1 + temp2;
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return(dot);
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}
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#if defined(SMP)
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static int dot_thread_function(BLASLONG n, BLASLONG dummy0,
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BLASLONG dummy1, FLOAT dummy2, FLOAT *x, BLASLONG inc_x, FLOAT *y,
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BLASLONG inc_y, RETURN_TYPE *result, BLASLONG dummy3)
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{
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*(RETURN_TYPE *)result = dot_compute(n, x, inc_x, y, inc_y);
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return 0;
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}
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extern int blas_level1_thread_with_return_value(int mode, BLASLONG m, BLASLONG n,
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BLASLONG k, void *alpha, void *a, BLASLONG lda, void *b, BLASLONG ldb,
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void *c, BLASLONG ldc, int (*function)(void), int nthreads);
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#endif
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FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
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{
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#if defined(SMP)
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int nthreads;
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FLOAT dummy_alpha;
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#endif
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FLOAT dot = 0.0;
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#if defined(SMP)
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if (inc_x == 0 || inc_y == 0 || n <= 10000)
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nthreads = 1;
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else
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nthreads = num_cpu_avail(1);
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if (nthreads == 1) {
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dot = dot_compute(n, x, inc_x, y, inc_y);
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} else {
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int mode, i;
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char result[MAX_CPU_NUMBER * sizeof(double) * 2];
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RETURN_TYPE *ptr;
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#if !defined(DOUBLE)
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mode = BLAS_SINGLE | BLAS_REAL;
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#else
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mode = BLAS_DOUBLE | BLAS_REAL;
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#endif
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blas_level1_thread_with_return_value(mode, n, 0, 0, &dummy_alpha,
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x, inc_x, y, inc_y, result, 0,
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(int (*)(void)) dot_thread_function, nthreads);
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ptr = (RETURN_TYPE *)result;
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for (i = 0; i < nthreads; i++) {
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dot = dot + (*ptr);
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ptr = (RETURN_TYPE *)(((char *)ptr) + sizeof(double) * 2);
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}
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}
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#else
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dot = dot_compute(n, x, inc_x, y, inc_y);
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#endif
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return dot;
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}
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