OpenBLAS/kernel/power/zswap.c

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/**************************************************************************************
* 2016/03/27 Werner Saar (wernsaar@googlemail.com)
* 	 BLASTEST 		: OK
* 	 CTEST			: OK
* 	 TEST			: OK
*	 LAPACK-TEST		: OK
**************************************************************************************/

#include "common.h"


#if defined(__VEC__) || defined(__ALTIVEC__)
#if defined(POWER8) || defined(POWER9)
#include "zswap_microk_power8.c"
#elif defined(POWER10) 
#include "cswap_microk_power10.c"
#endif
#endif


#ifndef HAVE_KERNEL_16

static void zswap_kernel_16(BLASLONG n, FLOAT *x, FLOAT *y)
{

	BLASLONG i=0;
	FLOAT f0, f1, f2, f3, f4, f5, f6, f7;
	FLOAT g0, g1, g2, g3, g4, g5, g6, g7;
	FLOAT *x1=x;
	FLOAT *y1=y;

	while ( i<n )
	{

		f0 = x1[0];
		f1 = x1[1];
		f2 = x1[2];
		f3 = x1[3];
		f4 = x1[4];
		f5 = x1[5];
		f6 = x1[6];
		f7 = x1[7];

		g0 = y1[0];
		g1 = y1[1];
		g2 = y1[2];
		g3 = y1[3];
		g4 = y1[4];
		g5 = y1[5];
		g6 = y1[6];
		g7 = y1[7];

		y1[0] = f0;
		y1[1] = f1;
		y1[2] = f2;
		y1[3] = f3;
		y1[4] = f4;
		y1[5] = f5;
		y1[6] = f6;
		y1[7] = f7;

		x1[0] = g0;
		x1[1] = g1;
		x1[2] = g2;
		x1[3] = g3;
		x1[4] = g4;
		x1[5] = g5;
		x1[6] = g6;
		x1[7] = g7;

		x1 += 8;
		y1 += 8;

		i+=4;
	}
	return;

}


#endif


int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT dummy3, FLOAT dummy4, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2)
{
	BLASLONG i=0;
	BLASLONG ix=0,iy=0;
	FLOAT temp[2];
	BLASLONG inc_x2, inc_y2;

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

	if ( (inc_x == 1) && (inc_y == 1 ))
	{

		BLASLONG n1 = n & -16;
		if ( n1 > 0 )
		{
			zswap_kernel_16(n1, x, y);
			i=n1;
			ix = 2* n1;
			iy = 2* n1;
		}

		while(i < n)
		{

	                temp[0]  = x[ix]   ;
        	        temp[1]  = x[ix+1] ;
                	x[ix]    = y[iy]   ;
                	x[ix+1]  = y[iy+1] ;
                	y[iy]    = temp[0] ;
                	y[iy+1]  = temp[1] ;

                	ix += 2 ;
                	iy += 2 ;
                	i++ ;


		}


	}
	else
	{

	        inc_x2 = 2 * inc_x;
	        inc_y2 = 2 * inc_y;

		while(i < n)
		{

	                temp[0]  = x[ix]   ;
        	        temp[1]  = x[ix+1] ;
                	x[ix]    = y[iy]   ;
                	x[ix+1]  = y[iy+1] ;
                	y[iy]    = temp[0] ;
                	y[iy+1]  = temp[1] ;

                	ix += inc_x2 ;
                	iy += inc_y2 ;
                	i++ ;

		}

	}
	return(0);
	

}