OpenBLAS/kernel/zarch/dscal.c

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#include "common.h"


#if  defined(Z13)
static void __attribute__ ((noinline))  dscal_kernel_8( BLASLONG n, FLOAT  da , FLOAT *x )
{
   
             __asm__ ("pfd 2, 0(%1) \n\t"      
                    "vrepg %%v0 , %%v0,0   \n\t"
                    "sllg  %%r0,%0,3       \n\t" 
                    "xgr   %%r1,%%r1       \n\t"
                    ".align 16 \n\t"    
                    "1: \n\t" 
                    "pfd 2, 256(%%r1,%1)   \n\t"     
                    "vl  %%v24, 0(%%r1,%1) \n\t"
                    "vfmdb    %%v24,%%v24,%%v0 \n\t"
                    "vst  %%v24, 0(%%r1,%1)  \n\t" 
                    "vl   %%v25, 16(%%r1,%1) \n\t"
                    "vfmdb    %%v25,%%v25,%%v0  \n\t"  
                    "vst  %%v25, 16(%%r1,%1) \n\t" 
                    "vl   %%v26, 32(%%r1,%1) \n\t"
                    "vfmdb    %%v26,%%v26,%%v0 \n\t"
                    "vst  %%v26, 32(%%r1,%1) \n\t"  
                    "vl   %%v27, 48(%%r1,%1) \n\t" 
                    "vfmdb    %%v27,%%v27,%%v0  \n\t"  
                    "vst  %%v27, 48(%%r1,%1) \n\t"  
                    "vl   %%v24, 64(%%r1,%1) \n\t"
                    "vfmdb    %%v24,%%v24,%%v0  \n\t"
                    "vst  %%v24, 64(%%r1,%1) \n\t" 
                    "vl   %%v25, 80(%%r1,%1) \n\t"
                    "vfmdb    %%v25,%%v25,%%v0  \n\t"  
                    "vst  %%v25, 80(%%r1,%1) \n\t" 
                    "vl   %%v26, 96(%%r1,%1) \n\t"
                    "vfmdb    %%v26,%%v26,%%v0  \n\t"
                    "vst  %%v26, 96(%%r1,%1)  \n\t"  
                    "vl   %%v27, 112(%%r1,%1) \n\t" 
                    "vfmdb    %%v27,%%v27,%%v0  \n\t"  
                    "vst  %%v27, 112(%%r1,%1) \n\t"   
                    "la %%r1,128(%%r1) \n\t"
                    "clgrjl %%r1,%%r0,1b \n\t"
                    : 
                    :"r"(n),"a"(x),"f"(da)
                    :"cc" , "memory" ,"r0","r1","v0","v24","v25","v26","v27"
                 );

}

static void __attribute__ ((noinline))  dscal_kernel_8_zero( BLASLONG n, FLOAT da , FLOAT *x )
{
   
             __asm__ ("pfd 2, 0(%1) \n\t"      
                    "vzero %%v0     \n\t"
                    "sllg %%r0,%0,3   \n\t" 
                    "xgr %%r1,%%r1    \n\t"
                    ".align 16 \n\t"    
                    "1: \n\t" 
                    "pfd 2, 256(%%r1,%1) \n\t"     
                    "vst  %%v0, 0(%%r1,%1)   \n\t" 
                    "vst  %%v0, 16(%%r1,%1)  \n\t" 
                    "vst  %%v0, 32(%%r1,%1)  \n\t"   
                    "vst  %%v0, 48(%%r1,%1)  \n\t"  
                    "vst  %%v0, 64(%%r1,%1)  \n\t" 
                    "vst  %%v0, 80(%%r1,%1)  \n\t" 
                    "vst  %%v0, 96(%%r1,%1)  \n\t"  
                    "vst  %%v0, 112(%%r1,%1) \n\t"   
                    "la %%r1,128(%%r1) \n\t"
                    "clgrjl %%r1,%%r0,1b \n\t"
                    : 
                    :"r"(n),"a"(x),"f"(da)
                    :"cc" , "memory" ,"r0","r1","v0"
                 );
}
 

#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,j=0;
    if ( n <= 0 || inc_x <=0 )
        return(0);

 
    if ( inc_x == 1 )
    {

        if ( da == 0.0 )
        {        

            BLASLONG n1 = n & -16;
            if ( n1 > 0 )
            {
                
                dscal_kernel_8_zero(n1 , da , x);
                j=n1;
            }

            while(j < n)
            {

                x[j]=0.0;
                j++;
            }

        }
        else
        {

            BLASLONG n1 = n & -16;
            if ( n1 > 0 )
            { 
                dscal_kernel_8(n1 , da , x);
                j=n1;
            }
            while(j < n)
            {

                x[j] = da * x[j] ;
                j++;
            }
        }


    }
    else
    {

        if ( da == 0.0 )
        {        

                        BLASLONG n1 = n & -4;

                        while (j < n1) {

                            x[i]=0.0;
                            x[i + inc_x]=0.0;
                            x[i + 2 * inc_x]=0.0;
                            x[i + 3 * inc_x]=0.0;

                            i += inc_x * 4; 
                            j += 4;

                        } 
            while(j < n)
            {

                x[i]=0.0;
                i += inc_x ;
                j++;
            }

        }
        else
        {
                        BLASLONG n1 = n & -4;

                        while (j < n1) {

                            x[i] = da * x[i] ;
                            x[i + inc_x] = da * x[i + inc_x];
                            x[i + 2 * inc_x] = da *  x[i + 2 * inc_x];
                            x[i + 3 * inc_x] = da * x[i + 3 * inc_x];

                            i += inc_x * 4; 
                            j += 4;

                        }  

            while(j < n)
            {

                x[i] = da * x[i] ;
                i += inc_x ;
                j++;
            }
        }

    }
    return 0;

}