OpenBLAS/kernel/zarch/zasum.c

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#include "common.h"
#include <math.h>

#if defined(DOUBLE)

#define ABS fabs

#else

#define ABS fabsf

#endif


static FLOAT zasum_kernel_16(BLASLONG n, FLOAT *x) {
    
    FLOAT asum;
    __asm__ (
            "pfd    1, 0(%[ptr_x]) \n\t"
            "sllg   %%r0,%[n],4    \n\t"
            "agr    %%r0,%[ptr_x]  \n\t"   
            "vzero  %%v0      \n\t"
            "vzero  %%v1      \n\t"
            "vzero  %%v22     \n\t"
            "vzero  %%v23     \n\t"   
            ".align 16 \n\t"
            "1:     \n\t"
            "pfd    1, 256(%[ptr_tmp] ) \n\t"
            "vlm    %%v24,%%v31,0(%[ptr_tmp]) \n\t"  
    
            "vflpdb %%v24, %%v24 \n\t"
            "vflpdb %%v25, %%v25 \n\t"
            "vflpdb %%v26, %%v26 \n\t"
            "vflpdb %%v27, %%v27 \n\t"
            "vflpdb %%v28, %%v28 \n\t"
            "vflpdb %%v29, %%v29 \n\t"
            "vflpdb %%v30, %%v30 \n\t"
            "vflpdb %%v31, %%v31 \n\t"
    
            "vfadb  %%v0,%%v0,%%v24    \n\t"
            "vfadb  %%v1,%%v1,%%v25    \n\t"
            "vfadb  %%v23,%%v23,%%v26  \n\t"
            "vfadb  %%v22,%%v22,%%v27  \n\t" 
            "vfadb  %%v0,%%v0,%%v28    \n\t"
            "vfadb  %%v1,%%v1,%%v29    \n\t"
            "vfadb  %%v23,%%v23,%%v30  \n\t"
            "vfadb  %%v22,%%v22,%%v31  \n\t" 
    
            "vlm    %%v24,%%v31, 128(%[ptr_tmp]) \n\t"  
    
            "vflpdb %%v24, %%v24 \n\t"
            "vflpdb %%v25, %%v25 \n\t"
            "vflpdb %%v26, %%v26 \n\t"
            "vflpdb %%v27, %%v27 \n\t"
            "vflpdb %%v28, %%v28 \n\t"
            "vflpdb %%v29, %%v29 \n\t"
            "vflpdb %%v30, %%v30 \n\t"
            "vflpdb %%v31, %%v31 \n\t"
            "la     %[ptr_tmp],256(%[ptr_tmp]) \n\t"  
            "vfadb  %%v0,%%v0,%%v24   \n\t"
            "vfadb  %%v1,%%v1,%%v25   \n\t"
            "vfadb  %%v23,%%v23,%%v26 \n\t"
            "vfadb  %%v22,%%v22,%%v27 \n\t" 
            "vfadb  %%v0,%%v0,%%v28   \n\t"
            "vfadb  %%v1,%%v1,%%v29   \n\t"
            "vfadb  %%v23,%%v23,%%v30 \n\t"
            "vfadb  %%v22,%%v22,%%v31 \n\t"  
            
            "clgrjl %[ptr_tmp],%%r0,1b \n\t"
            "vfadb  %%v24,%%v0,%%v1    \n\t"
            "vfadb  %%v25,%%v23,%%v22  \n\t"
            "vfadb  %%v0,%%v25,%%v24   \n\t"
            "vrepg  %%v1,%%v0,1        \n\t"
            "adbr   %%f0,%%f1          \n\t"
            "ldr    %[asum] ,%%f0"
            : [asum] "=f"(asum),[ptr_tmp] "+&a"(x)
            : [mem] "m"( *(const double (*)[2*n])x ), [n] "r"(n), [ptr_x] "a"(x) 
            : "cc",  "r0","f0","f1","v0","v1","v22","v23","v24","v25","v26","v27","v28","v29","v30","v31"
            );
    return asum;

}

 

FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
{
    BLASLONG i=0;
    BLASLONG ip=0;
    FLOAT sumf = 0.0; 
    BLASLONG n1;
    BLASLONG inc_x2;

    if (n <= 0 || inc_x <= 0) return(sumf);

    if ( inc_x == 1 )
    {

        n1 = n & -16;
        if ( n1 > 0 )
        {

            sumf=zasum_kernel_16(n1, x ); 
            i=n1;
            ip=2*n1;
        }

        while(i < n)
        {
            sumf += ABS(x[ip]) + ABS(x[ip+1]);
            i++;
            ip+=2;
        }

    }
    else
    {
        inc_x2 = 2* inc_x;

        while(i < n)
        {
            sumf += ABS(x[ip]) + ABS(x[ip+1]);
            ip+=inc_x2;
            i++;
        }

    }
    return(sumf);
}