OpenBLAS/kernel/zarch/saxpy.c

/***************************************************************************
Copyright (c) 2013-2017, The OpenBLAS Project
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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*****************************************************************************/

#include "common.h"

static void saxpy_kernel_64(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *alpha)
{ 
    __asm__ volatile( 
        "vlrepf %%v0,%3                   \n\t"
        "srlg  %%r0,%0,6                  \n\t"
        "xgr   %%r1,%%r1                  \n\t"
        "0:                               \n\t"
        "pfd 1, 1024(%%r1,%1)             \n\t"
        "pfd 2, 1024(%%r1,%2)             \n\t"

        "vl  %%v16,0(%%r1,%1)             \n\t"
        "vl  %%v17,16(%%r1,%1)            \n\t"
        "vl  %%v18,32(%%r1,%1)            \n\t"
        "vl  %%v19,48(%%r1,%1)            \n\t"
        "vl  %%v20,0(%%r1,%2)             \n\t"
        "vl  %%v21,16(%%r1,%2)            \n\t"
        "vl  %%v22,32(%%r1,%2)            \n\t"
        "vl  %%v23,48(%%r1,%2)            \n\t"
        
        "vfmasb   %%v16,%%v0,%%v16,%%v20  \n\t"
        "vfmasb   %%v17,%%v0,%%v17,%%v21  \n\t"
        "vfmasb   %%v18,%%v0,%%v18,%%v22  \n\t"
        "vfmasb   %%v19,%%v0,%%v19,%%v23  \n\t"

        "vl  %%v24,64(%%r1,%1)            \n\t"
        "vl  %%v25,80(%%r1,%1)            \n\t"
        "vl  %%v26,96(%%r1,%1)            \n\t"
        "vl  %%v27,112(%%r1,%1)           \n\t"
        "vl  %%v28,64(%%r1,%2)            \n\t"
        "vl  %%v29,80(%%r1,%2)            \n\t"
        "vl  %%v30,96(%%r1,%2)            \n\t"
        "vl  %%v31,112(%%r1,%2)           \n\t"

        "vfmasb   %%v20,%%v0,%%v24,%%v28  \n\t"
        "vfmasb   %%v21,%%v0,%%v25,%%v29  \n\t"
        "vfmasb   %%v22,%%v0,%%v26,%%v30  \n\t"
        "vfmasb   %%v23,%%v0,%%v27,%%v31  \n\t"

        "vst  %%v16,0(%%r1,%2)            \n\t"
        "vst  %%v17,16(%%r1,%2)           \n\t"
        "vst  %%v18,32(%%r1,%2)           \n\t"
        "vst  %%v19,48(%%r1,%2)           \n\t"
        "vst  %%v20,64(%%r1,%2)           \n\t"
        "vst  %%v21,80(%%r1,%2)           \n\t"
        "vst  %%v22,96(%%r1,%2)           \n\t"
        "vst  %%v23,112(%%r1,%2)          \n\t"

        "vl  %%v16,128(%%r1,%1)           \n\t"
        "vl  %%v17,144(%%r1,%1)           \n\t"
        "vl  %%v18,160(%%r1,%1)           \n\t"
        "vl  %%v19,176(%%r1,%1)           \n\t"
        "vl  %%v20,128(%%r1,%2)           \n\t"
        "vl  %%v21,144(%%r1,%2)           \n\t"
        "vl  %%v22,160(%%r1,%2)           \n\t"
        "vl  %%v23,176(%%r1,%2)           \n\t"
        
        "vfmasb   %%v16,%%v0,%%v16,%%v20  \n\t"
        "vfmasb   %%v17,%%v0,%%v17,%%v21  \n\t"
        "vfmasb   %%v18,%%v0,%%v18,%%v22  \n\t"
        "vfmasb   %%v19,%%v0,%%v19,%%v23  \n\t"

        "vl  %%v24,192(%%r1,%1)           \n\t"
        "vl  %%v25,208(%%r1,%1)           \n\t"
        "vl  %%v26,224(%%r1,%1)           \n\t"
        "vl  %%v27,240(%%r1,%1)           \n\t"
        "vl  %%v28,192(%%r1,%2)           \n\t"
        "vl  %%v29,208(%%r1,%2)           \n\t"
        "vl  %%v30,224(%%r1,%2)           \n\t"
        "vl  %%v31,240(%%r1,%2)           \n\t"

        "vfmasb   %%v20,%%v0,%%v24,%%v28  \n\t"
        "vfmasb   %%v21,%%v0,%%v25,%%v29  \n\t"
        "vfmasb   %%v22,%%v0,%%v26,%%v30  \n\t"
        "vfmasb   %%v23,%%v0,%%v27,%%v31  \n\t"
        
        "vst  %%v16,128(%%r1,%2)          \n\t"
        "vst  %%v17,144(%%r1,%2)          \n\t"
        "vst  %%v18,160(%%r1,%2)          \n\t"
        "vst  %%v19,176(%%r1,%2)          \n\t"
        "vst  %%v20,192(%%r1,%2)          \n\t"
        "vst  %%v21,208(%%r1,%2)          \n\t"
        "vst  %%v22,224(%%r1,%2)          \n\t"
        "vst  %%v23,240(%%r1,%2)          \n\t"

        "agfi  %%r1,256                   \n\t"
        "brctg %%r0,0b                        "
        :
        :"r"(n),"ZR"((const FLOAT (*)[n])x),"ZR"((FLOAT (*)[n])y),"m"(*alpha)
        :"memory","cc","r0","r1","v0","v16","v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27","v28","v29","v30","v31"
    );
}

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 ( n1 )
            saxpy_kernel_64(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 ;

}