zscal.c

/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin. */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* 1. Redistributions of source code must retain the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer. */
/* */
/* 2. 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. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY OF TEXAS AT */
/* AUSTIN ``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 UNIVERSITY OF TEXAS AT */
/* AUSTIN 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. */
/* */
/* The views and conclusions contained in the software and */
/* documentation are those of the authors and should not be */
/* interpreted as representing official policies, either expressed */
/* or implied, of The University of Texas at Austin. */
/*********************************************************************/

#include<stdio.h>
#include"common.h"
#ifdefFUNCTION_PROFILE
#include"functable.h"
#endif

#ifndefCBLAS

voidNAME(blasint*N, FLOAT*ALPHA, FLOAT*x, blasint*INCX){

blasintn=*N;
blasintincx=*INCX;

#ifndefSSCAL
FLOAT*alpha=ALPHA;
#else
FLOATalpha[2] = {ALPHA[0], ZERO};
#endif

#else

#ifndefSSCAL
voidCNAME(blasintn, void*VALPHA, void*vx, blasintincx){

FLOAT*x= (FLOAT*) vx;
FLOAT*alpha=(FLOAT*)VALPHA;
#else
voidCNAME(blasintn, FLOATalpha_r, void*vx, blasintincx){
FLOAT*x= (FLOAT*) vx;

FLOATalpha[2] = {alpha_r, ZERO};
#endif
#endif

#ifdefSMP
intmode;
intnthreads;
#endif

#ifndefCBLAS
PRINT_DEBUG_NAME;
#else
PRINT_DEBUG_CNAME;
#endif

if (incx <= 0||n <= 0) return;

if ((alpha[0] ==ONE) && (alpha[1] ==ZERO)) return;

IDEBUG_START;

FUNCTION_PROFILE_START();

#ifdefSMP
if ( n <= 1048576 )
nthreads=1;
else
nthreads=num_cpu_avail(1);

if (nthreads==1) {
#endif

SCAL_K(n, 0, 0, alpha[0], alpha[1], x, incx, NULL, 0, NULL, 0);

#ifdefSMP
 } else {
#ifdefDOUBLE
mode=BLAS_DOUBLE | BLAS_COMPLEX;
#else
mode=BLAS_SINGLE | BLAS_COMPLEX;
#endif

blas_level1_thread(mode, n, 0, 0, alpha, x, incx, NULL, 0, NULL, 0, (int (*)(void))SCAL_K, nthreads);

 }
#endif

FUNCTION_PROFILE_END(4, n, n);

IDEBUG_END;

return;

}