OpenBLAS/kernel/zarch/dscal.c

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#include "common.h"

#ifdef Z13_A
static void   dscal_kernel_32( BLASLONG n, FLOAT  da , FLOAT *x )
{

          
             __asm__ ("pfd    2, 0(%[x_ptr])   \n\t"
                      "lgdr   %%r0,%[alpha]    \n\t"
                      "vlvgp  %%v0,%%r0,%%r0   \n\t"
                      "srlg   %[n],%[n],4 \n\t"
                      "vlr    %%v1,%%v0        \n\t"
                      "vlm    %%v16,%%v23, 0(%[x_ptr])          \n\t"
                      "la     %[x_ptr], 128(%[x_ptr])     \n\t"
                      "aghik  %[n], %[n], -1             \n\t"
                      "jle     2f     \n\t"
                       ".align 16 \n\t"
                      "1:          \n\t"
                      "vfmdb  %%v24, %%v16, %%v0          \n\t"
                      "vfmdb  %%v25, %%v17, %%v0          \n\t"
                      "vfmdb  %%v26, %%v18, %%v0          \n\t"
                      "vfmdb  %%v27, %%v19, %%v1          \n\t"
                      "vlm     %%v16,%%v19, 0(%[x_ptr])         \n\t"
                      "vfmdb  %%v28, %%v20, %%v0          \n\t"
                      "vfmdb  %%v29, %%v21, %%v1          \n\t"
                      "vfmdb  %%v30, %%v22, %%v0          \n\t"
                      "vfmdb  %%v31, %%v23, %%v1          \n\t"
                      "vlm     %%v20,%%v23, 64(%[x_ptr])         \n\t"
                      "lay    %[x_ptr], -128(%[x_ptr])    \n\t"
                      "vstm   %%v24,%%v31, 0(%[x_ptr])          \n\t"
                      "la     %[x_ptr],256(%[x_ptr])      \n\t"
                      "brctg %[n],1b     \n\t"
                      "2:            \n\t"
                      "vfmdb  %%v24, %%v16, %%v0          \n\t"
                      "vfmdb  %%v25, %%v17, %%v1          \n\t"
                      "vfmdb  %%v26, %%v18, %%v0          \n\t"
                      "vfmdb  %%v27, %%v19, %%v1          \n\t"
                      "lay    %[x_ptr] , -128(%[x_ptr])   \n\t"
                      "vfmdb  %%v28, %%v20, %%v0          \n\t"
                      "vfmdb  %%v29, %%v21, %%v1          \n\t"
                      "vfmdb  %%v30, %%v22, %%v0          \n\t"
                      "vfmdb  %%v31, %%v23, %%v1          \n\t"
                      "vstm   %%v24,%%v31, 0(%[x_ptr])         \n\t"
                      : [mem] "+m" (*(double (*)[n])x) ,[x_ptr] "+&a"(x),[n] "+&r"(n)
                                       : [alpha] "f"(da)
                                       :"cc" ,  "r0","v0","v1","v16","v17","v18","v19","v20","v21",
                                       "v22","v23","v24","v25","v26","v27","v28","v29","v30","v31"
                 );
 }
#else
static void   dscal_kernel_32( BLASLONG n, FLOAT  da , FLOAT *x )
{

             /* faster than sequence of triples(vl vfmd vst) (tested OPENBLAS_LOOPS=10000) */
             __asm__ ("pfd    2, 0(%[x_ptr])   \n\t"      
                      "lgdr   %%r0,%[alpha]    \n\t"
                      "vlvgp  %%v0,%%r0,%%r0   \n\t"
                      "vlr    %%v1,%%v0        \n\t"
                      "sllg   %%r0,%[n],3      \n\t" 
                      "agr    %%r0,%[x_ptr]    \n\t"
                      ".align 16 \n\t"    
                      "1:     \n\t" 
                      "pfd    2,         256(%[x_ptr])     \n\t"    
                      "vlm    %%v16,%%v23, 0(%[x_ptr])     \n\t"
                      "vfmdb  %%v16,%%v16,%%v0 \n\t"
                      "vfmdb  %%v17,%%v17,%%v1 \n\t"
                      "vfmdb  %%v18,%%v18,%%v0 \n\t"
                      "vfmdb  %%v19,%%v19,%%v1 \n\t"
                      "vfmdb  %%v20,%%v20,%%v0 \n\t"
                      "vfmdb  %%v21,%%v21,%%v1 \n\t"
                      "vfmdb  %%v22,%%v22,%%v0 \n\t"
                      "vfmdb  %%v23,%%v23,%%v1 \n\t" 
                      "vstm   %%v16,%%v23, 0(%[x_ptr])      \n\t"  
                      "vlm    %%v24,%%v31,128(%[x_ptr])     \n\t"                                              
                      "vfmdb  %%v24,%%v24,%%v0 \n\t"       
                      "vfmdb  %%v25,%%v25,%%v1 \n\t"
                      "vfmdb  %%v26,%%v26,%%v0 \n\t"
                      "vfmdb  %%v27,%%v27,%%v1 \n\t"
                      "vfmdb  %%v28,%%v28,%%v0 \n\t"
                      "vfmdb  %%v29,%%v29,%%v1 \n\t"
                      "vfmdb  %%v30,%%v30,%%v0 \n\t"
                      "vfmdb  %%v31,%%v31,%%v1 \n\t"                                     
                      "vstm   %%v24,%%v31,128(%[x_ptr])    \n\t"  
                      "la     %[x_ptr],  256(%[x_ptr])    \n\t"
                      "clgrjl %[x_ptr],%%r0,1b \n\t"  
                      : [mem] "+m" (*(double (*)[n])x) ,[x_ptr] "+&a"(x)
                      : [n] "r"(n),[alpha] "f"(da)
                      :"cc" ,  "r0","v0","v1","v16","v17","v18","v19","v20","v21",
                      "v22","v23","v24","v25","v26","v27","v28","v29","v30","v31"
                 );

 }
#endif
static void   dscal_kernel_32_zero( BLASLONG n,  FLOAT *x )
{
   
             __asm__ ("pfd    2, 0(%[x_ptr])   \n\t"      
                      "vzero  %%v24            \n\t"
                      "sllg   %%r0,%[n],3      \n\t" 
                      "vzero  %%v25            \n\t"
                      "agr    %%r0,%[x_ptr]    \n\t"
                      ".align 16 \n\t"    
                      "1:        \n\t" 
                      "pfd    2,      256(%[x_ptr])  \n\t"     
                      "vst    %%v24,    0(%[x_ptr])  \n\t" 
                      "vst    %%v25,    16(%[x_ptr]) \n\t" 
                      "vst    %%v24,    32(%[x_ptr]) \n\t"   
                      "vst    %%v25,    48(%[x_ptr]) \n\t"  
                      "vst    %%v24,    64(%[x_ptr]) \n\t" 
                      "vst    %%v25,    80(%[x_ptr]) \n\t" 
                      "vst    %%v24,    96(%[x_ptr]) \n\t"  
                      "vst    %%v25,   112(%[x_ptr]) \n\t"  
                      "vst    %%v24,   128(%[x_ptr]) \n\t" 
                      "vst    %%v25,   144(%[x_ptr]) \n\t" 
                      "vst    %%v24,   160(%[x_ptr]) \n\t"   
                      "vst    %%v25,   176(%[x_ptr]) \n\t"  
                      "vst    %%v24,   192(%[x_ptr]) \n\t" 
                      "vst    %%v25,   208(%[x_ptr]) \n\t" 
                      "vst    %%v24,   224(%[x_ptr]) \n\t"  
                      "vst    %%v25,   240(%[x_ptr]) \n\t"                        
                      "la     %[x_ptr],256(%[x_ptr]) \n\t"
                      "clgrjl %[x_ptr],%%r0,1b \n\t"
                      : [mem] "=m" (*(double (*)[n])x) ,[x_ptr] "+&a"(x)
                      : [n] "r"(n)
                      :"cc" ,  "r0", "v24" ,"v25"
                 );
}
 



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 & -32;
            if ( n1 > 0 )
            {
                
                dscal_kernel_32_zero(n1 ,  x);
                j=n1;
            }

            while(j < n)
            {

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

        }
        else
        {

            BLASLONG n1 = n & -32;
            if ( n1 > 0 )
            { 
                dscal_kernel_32(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;

}