OpenBLAS/kernel/zarch/ccopy.c

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#include "common.h"

static void ccopy_kernel_32(BLASLONG n, FLOAT *x, FLOAT *y)
{
    __asm__ volatile (
        "lgr  %%r1,%1            \n\t"
        "lgr  %%r2,%2            \n\t"
        "srlg %%r0,%0,5          \n\t"
        "0:                      \n\t"
        "pfd 1, 1024(%%r1)       \n\t"
        "pfd 2, 1024(%%r2)       \n\t"
        "mvc 0(256,%%r2),0(%%r1) \n\t"
        "agfi   %%r1,256         \n\t"
        "agfi   %%r2,256         \n\t"
        "brctg %%r0,0b               "
        :
        :"r"(n),"a"((const FLOAT (*)[n * 2])x),"a"((FLOAT (*)[n * 2])y)
        :"memory","cc","r0","r1","r2"
    );
}

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

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

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

        BLASLONG n1 = n & -32;
        if ( n1 > 0 )
        {
            ccopy_kernel_32(n1, x, y);
            i=n1;
            ix=n1*2;
            iy=n1*2;
        }

        while(i < n)
        {
            y[iy] = x[iy] ;
            y[iy+1] = x[ix+1] ;
            ix+=2;
            iy+=2;
            i++ ;

        }


    }
    else
    {

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

        while(i < n)
        {
            y[iy] = x[ix] ;
            y[iy+1] = x[ix+1] ;
            ix += inc_x2 ;
            iy += inc_y2 ;
            i++ ;

        }

    }
    
    return(0);
}