OpenBLAS/kernel/mips/iamax.c

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#include "common.h"
#include <math.h>

#if defined(DOUBLE)

#define ABS fabs

#else

#define ABS fabsf

#endif


BLASLONG CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
{
	BLASLONG i=0;
	BLASLONG ix=0;
	FLOAT maxf=0.0;
	BLASLONG max=0;

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

	maxf=ABS(x[0]);
	ix += inc_x;
	i++;

	while(i < n)
	{
		if( ABS(x[ix]) > maxf )
		{
			max = i;
			maxf = ABS(x[ix]);
		}
		ix += inc_x;
		i++;
	}
	return(max+1);
}