OpenBLAS/kernel/arm/zscal.c

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/**************************************************************************************
* 2013/09/14 Saar
*	 BLASTEST float		: OK
* 	 BLASTEST double	: OK
* 	 CTEST			: OK
* 	 TEST			: OK
*
**************************************************************************************/

#include "common.h"

int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da_r,FLOAT da_i, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2)
{
	BLASLONG i=0;
	BLASLONG inc_x2;
	BLASLONG ip = 0;
	FLOAT temp;

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


	inc_x2 = 2 * inc_x;
	for ( i=0; i<n; i++ )
	{
		if ( da_r == 0.0 )
		{
			if ( da_i == 0.0 )
			{
				temp = 0.0;
				x[ip+1] = 0.0 ;
			}
			else
			{
				temp = - da_i * x[ip+1] ;
				if (isnan(x[ip]) || isinf(x[ip])) temp = NAN;
				if (!isinf(x[ip+1])) 
					x[ip+1] = da_i * x[ip]  ;
				else 	x[ip+1] = NAN;
			}
		}
		else
		{
			if ( da_i == 0.0 )
			{
				temp    = da_r * x[ip]  ;
				x[ip+1] = da_r * x[ip+1];
			}
			else
			{
				temp    = da_r * x[ip]   - da_i * x[ip+1] ;
				x[ip+1] = da_r * x[ip+1] + da_i * x[ip]   ;
			}
		}
		x[ip]   = temp;

		ip += inc_x2;
	}

	return(0);

}