OpenBLAS/kernel/power/saxpy.c

/***************************************************************************
Copyright (c) 2013-2018, The OpenBLAS Project
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#include "common.h"

#define  offset_0 0
#define  offset_1 16
#define  offset_2 32
#define  offset_3 48
#define  offset_4 64
#define  offset_5 80
#define  offset_6 96
#define  offset_7 112
#define  offset_8 128
#define  offset_9 144
#define  offset_10 160
#define  offset_11 176
#define  offset_12 192
#define  offset_13 208
#define  offset_14 224
#define  offset_15 240
 

#if defined(__VEC__) || defined(__ALTIVEC__)

#ifndef HAVE_KERNEL_8
#include <altivec.h> 

static void saxpy_kernel_64(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT alpha)
{
    BLASLONG  i = 0;
    __vector float v_a __attribute((aligned(16))) = {alpha,alpha,alpha,alpha}; 
    __vector float * vptr_y =(__vector float *)y;
    __vector float * vptr_x =(__vector float *)x;
        
    for(; i<n/4; i+=16){


        register __vector float vy_0 = vec_vsx_ld( offset_0 ,vptr_y ) ;
        register __vector float vy_1 = vec_vsx_ld( offset_1 ,vptr_y ) ;
        register __vector float vy_2 = vec_vsx_ld( offset_2 ,vptr_y ) ;
        register __vector float vy_3 = vec_vsx_ld( offset_3 ,vptr_y ) ;
        register __vector float vy_4 = vec_vsx_ld( offset_4 ,vptr_y ) ;
        register __vector float vy_5 = vec_vsx_ld( offset_5 ,vptr_y ) ;
        register __vector float vy_6 = vec_vsx_ld( offset_6 ,vptr_y ) ;
        register __vector float vy_7 = vec_vsx_ld( offset_7 ,vptr_y ) ;
        register __vector float vy_8 = vec_vsx_ld( offset_8 ,vptr_y ) ;
        register __vector float vy_9 = vec_vsx_ld( offset_9 ,vptr_y ) ;
        register __vector float vy_10 = vec_vsx_ld( offset_10 ,vptr_y ) ;
        register __vector float vy_11 = vec_vsx_ld( offset_11 ,vptr_y ) ;
        register __vector float vy_12 = vec_vsx_ld( offset_12 ,vptr_y ) ;
        register __vector float vy_13 = vec_vsx_ld( offset_13 ,vptr_y ) ;
        register __vector float vy_14 = vec_vsx_ld( offset_14 ,vptr_y ) ;
        register __vector float vy_15 = vec_vsx_ld( offset_15 ,vptr_y ) ;

        register __vector float vx_0 = vec_vsx_ld( offset_0 ,vptr_x ) ;
        register __vector float vx_1 = vec_vsx_ld( offset_1 ,vptr_x ) ;
        register __vector float vx_2 = vec_vsx_ld( offset_2 ,vptr_x ) ;
        register __vector float vx_3 = vec_vsx_ld( offset_3 ,vptr_x ) ;
        register __vector float vx_4 = vec_vsx_ld( offset_4 ,vptr_x ) ;
        register __vector float vx_5 = vec_vsx_ld( offset_5 ,vptr_x ) ;
        register __vector float vx_6 = vec_vsx_ld( offset_6 ,vptr_x ) ;
        register __vector float vx_7 = vec_vsx_ld( offset_7 ,vptr_x ) ;
        register __vector float vx_8 = vec_vsx_ld( offset_8 ,vptr_x ) ;
        register __vector float vx_9 = vec_vsx_ld( offset_9 ,vptr_x ) ;
        register __vector float vx_10 = vec_vsx_ld( offset_10 ,vptr_x ) ;
        register __vector float vx_11 = vec_vsx_ld( offset_11 ,vptr_x ) ;
        register __vector float vx_12 = vec_vsx_ld( offset_12 ,vptr_x ) ;
        register __vector float vx_13 = vec_vsx_ld( offset_13 ,vptr_x ) ;
        register __vector float vx_14 = vec_vsx_ld( offset_14 ,vptr_x ) ;
        register __vector float vx_15 = vec_vsx_ld( offset_15 ,vptr_x ) ;
        vy_0 += vx_0*v_a;
        vy_1 += vx_1*v_a;
        vy_2 += vx_2*v_a;
        vy_3 += vx_3*v_a;
        vy_4 += vx_4*v_a;
        vy_5 += vx_5*v_a;
        vy_6 += vx_6*v_a;
        vy_7 += vx_7*v_a;
        vy_8 += vx_8*v_a;
        vy_9 += vx_9*v_a;
        vy_10 += vx_10*v_a;
        vy_11 += vx_11*v_a;
        vy_12 += vx_12*v_a;
        vy_13 += vx_13*v_a;
        vy_14 += vx_14*v_a;
        vy_15 += vx_15*v_a;

    	vec_vsx_st( vy_0, offset_0 ,vptr_y ) ;
        vec_vsx_st( vy_1, offset_1 ,vptr_y ) ;
        vec_vsx_st( vy_2, offset_2 ,vptr_y ) ;
        vec_vsx_st( vy_3, offset_3 ,vptr_y ) ;
        vec_vsx_st( vy_4, offset_4 ,vptr_y ) ;
        vec_vsx_st( vy_5, offset_5 ,vptr_y ) ;
        vec_vsx_st( vy_6, offset_6 ,vptr_y ) ;
	vec_vsx_st( vy_7, offset_7 ,vptr_y ) ; 
    	vec_vsx_st( vy_8, offset_8 ,vptr_y ) ;
        vec_vsx_st( vy_9, offset_9 ,vptr_y ) ;
        vec_vsx_st( vy_10, offset_10 ,vptr_y ) ;
        vec_vsx_st( vy_11, offset_11 ,vptr_y ) ;
        vec_vsx_st( vy_12, offset_12 ,vptr_y ) ;
        vec_vsx_st( vy_13, offset_13 ,vptr_y ) ;
        vec_vsx_st( vy_14, offset_14 ,vptr_y ) ;
	vec_vsx_st( vy_15, offset_15 ,vptr_y ) ; 

        vptr_x+=16;
	vptr_y+=16; 

/*

        v_y[i]    += v_a * v_x[i];
        v_y[i+1]  += v_a * v_x[i+1];
        v_y[i+2]  += v_a * v_x[i+2];
        v_y[i+3]  += v_a * v_x[i+3];
        v_y[i+4]  += v_a * v_x[i+4];
        v_y[i+5]  += v_a * v_x[i+5];
        v_y[i+6]  += v_a * v_x[i+6];
        v_y[i+7]  += v_a * v_x[i+7]; 
        v_y[i+8]  += v_a * v_x[i+8];
        v_y[i+9]  += v_a * v_x[i+9];
        v_y[i+10] += v_a * v_x[i+10];
        v_y[i+11] += v_a * v_x[i+11];
        v_y[i+12] += v_a * v_x[i+12];
        v_y[i+13] += v_a * v_x[i+13];
        v_y[i+14] += v_a * v_x[i+14];
        v_y[i+15] += v_a * v_x[i+15];
*/
    }
}
#endif
#endif

int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2)
{
	BLASLONG i=0;
	BLASLONG ix=0,iy=0;

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

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

		BLASLONG n1 = n & -64;
#if defined(__VEC__) || defined(__ALTIVEC__)

		if ( n1 )
			saxpy_kernel_64(n1, x, y, da);

		i = n1;
#endif
		while(i < n)
		{

			y[i] += da * x[i] ;
			i++ ;

		}
		return(0);


	}

	BLASLONG n1 = n & -4;

	while(i < n1)
	{

		FLOAT m1      = da * x[ix] ;
		FLOAT m2      = da * x[ix+inc_x] ;
		FLOAT m3      = da * x[ix+2*inc_x] ;
		FLOAT m4      = da * x[ix+3*inc_x] ;

		y[iy]         += m1 ;
		y[iy+inc_y]   += m2 ;
		y[iy+2*inc_y] += m3 ;
		y[iy+3*inc_y] += m4 ;

		ix  += inc_x*4 ;
		iy  += inc_y*4 ;
		i+=4 ;

	}

	while(i < n)
	{

		y[iy] += da * x[ix] ;
		ix  += inc_x ;
		iy  += inc_y ;
		i++ ;

	}
	return(0);

}