OpenBLAS/kernel/zarch/daxpy.c

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#include "common.h"

#define PREFETCH_INS 1
#if defined(Z13_A)
#include <vecintrin.h>

static void daxpy_kernel_32(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT alpha)
{
    BLASLONG  i = 0;
    __vector double v_a = {alpha,alpha}; 
    __vector double * v_y=(__vector double *)y;
    __vector double * v_x=(__vector double *)x;
        
    for(; i<n/2; i+=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];
    }

}
#else
static void   daxpy_kernel_32(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT alpha)
{ 
        
         __asm__ volatile( 
#if defined(PREFETCH_INS)         
                   "pfd      1, 0(%[x_tmp])   \n\t"
                   "pfd      2, 0(%[y_tmp])   \n\t"
#endif
                    "lgdr    %%r0,%[alpha]    \n\t"
                    "vlvgp   %%v0,%%r0,%%r0   \n\t"   
                    "srlg    %%r0,%[n],5      \n\t" 
                    "vlr     %%v1,%%v0        \n\t"
                    ".align 16 \n\t"    
                    "1: \n\t"
#if defined(PREFETCH_INS)         
                    "pfd      1, 256(%[x_tmp]) \n\t"
                    "pfd      2, 256(%[y_tmp]) \n\t"
#endif                  
                    "vlm      %%v16,%%v23,  0(%[x_tmp])    \n\t"
                    "vlm      %%v24, %%v31, 0(%[y_tmp])    \n\t"
                    "vfmadb   %%v16,%%v0,%%v16,%%v24       \n\t"
                    "vfmadb   %%v17,%%v1,%%v17,%%v25       \n\t"  
                    "vfmadb   %%v18,%%v0,%%v18,%%v26       \n\t"
                    "vfmadb   %%v19,%%v1,%%v19,%%v27       \n\t"
                    "vfmadb   %%v20,%%v0,%%v20,%%v28       \n\t"
                    "vfmadb   %%v21,%%v1,%%v21,%%v29       \n\t"  
                    "vfmadb   %%v22,%%v0,%%v22,%%v30       \n\t"
                    "vfmadb   %%v23,%%v1,%%v23,%%v31       \n\t"
                    "vstm     %%v16,%%v23,   0(%[y_tmp])   \n\t" 
                    "vlm      %%v24,%%v31, 128(%[x_tmp])   \n\t"
                    "vlm      %%v16,%%v23, 128(%[y_tmp])   \n\t"
                    "vfmadb   %%v24,%%v0,%%v24,%%v16       \n\t"
                    "vfmadb   %%v25,%%v1,%%v25,%%v17       \n\t"  
                    "vfmadb   %%v26,%%v0,%%v26,%%v18       \n\t"
                    "vfmadb   %%v27,%%v1,%%v27,%%v19       \n\t"
                    "vfmadb   %%v28,%%v0,%%v28,%%v20       \n\t"
                    "vfmadb   %%v29,%%v1,%%v29,%%v21       \n\t"  
                    "vfmadb   %%v30,%%v0,%%v30,%%v22       \n\t"
                    "vfmadb   %%v31,%%v1,%%v31,%%v23       \n\t"  
                    "la       %[x_tmp],256(%[x_tmp])       \n\t"
                    "vstm     %%v24, %%v31, 128(%[y_tmp])  \n\t"
                    "la       %[y_tmp],256(%[y_tmp])       \n\t" 
                    "brctg    %%r0,1b"
                    : [mem_y] "+m" (*(double (*)[n])y), [x_tmp] "+&a"(x), [y_tmp] "+&a"(y)
                    : [mem_x] "m" (*(const double (*)[n])x), [n] "r"(n), [alpha] "f"(alpha)
                    :"cc", "r0", "v0","v1","v16","v17","v18","v19","v20","v21",
                    "v22","v23","v24","v25","v26","v27","v28","v29","v30","v31"
                 );
 

}
 
 

#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 & -32;

        if ( n1 )
            daxpy_kernel_32(n1, x, y , da );

        i = n1;
        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 ;

}