OpenBLAS/kernel/zarch/casum.c

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

#if defined(DOUBLE)
#define ABS fabs
#else
#define ABS fabsf
#endif

static FLOAT casum_kernel_32(BLASLONG n, FLOAT *x)
{
    FLOAT asum;

    __asm__ (
        "vzero   %%v0               \n\t"
        "vzero   %%v1               \n\t"
        "vzero   %%v2               \n\t"
        "vzero   %%v3               \n\t"
        "srlg  %%r0,%1,5            \n\t"
        "xgr %%r1,%%r1              \n\t"
        "0:                         \n\t"
        "pfd  1, 1024(%%r1,%2)      \n\t"
        "vl  %%v16, 0(%%r1,%2)      \n\t"
        "vl  %%v17, 16(%%r1,%2)     \n\t"
        "vl  %%v18, 32(%%r1,%2)     \n\t"
        "vl  %%v19, 48(%%r1,%2)     \n\t"
        "vl  %%v20, 64(%%r1,%2)     \n\t"
        "vl  %%v21, 80(%%r1,%2)     \n\t"
        "vl  %%v22, 96(%%r1,%2)     \n\t"
        "vl  %%v23, 112(%%r1,%2)    \n\t"

        "vflpsb  %%v16, %%v16       \n\t"
        "vflpsb  %%v17, %%v17       \n\t"
        "vflpsb  %%v18, %%v18       \n\t"
        "vflpsb  %%v19, %%v19       \n\t"
        "vflpsb  %%v20, %%v20       \n\t"
        "vflpsb  %%v21, %%v21       \n\t"
        "vflpsb  %%v22, %%v22       \n\t"
        "vflpsb  %%v23, %%v23       \n\t"

        "vfasb   %%v0,%%v0,%%v16    \n\t"
        "vfasb   %%v1,%%v1,%%v17    \n\t"
        "vfasb   %%v2,%%v2,%%v18    \n\t"
        "vfasb   %%v3,%%v3,%%v19    \n\t"
        "vfasb   %%v0,%%v0,%%v20    \n\t"
        "vfasb   %%v1,%%v1,%%v21    \n\t"
        "vfasb   %%v2,%%v2,%%v22    \n\t"
        "vfasb   %%v3,%%v3,%%v23    \n\t"

        "vl  %%v16, 128(%%r1,%2)    \n\t"
        "vl  %%v17, 144(%%r1,%2)    \n\t"
        "vl  %%v18, 160(%%r1,%2)    \n\t"
        "vl  %%v19, 176(%%r1,%2)    \n\t"
        "vl  %%v20, 192(%%r1,%2)    \n\t"
        "vl  %%v21, 208(%%r1,%2)    \n\t"
        "vl  %%v22, 224(%%r1,%2)    \n\t"
        "vl  %%v23, 240(%%r1,%2)    \n\t"

        "vflpsb  %%v16, %%v16       \n\t"
        "vflpsb  %%v17, %%v17       \n\t"
        "vflpsb  %%v18, %%v18       \n\t"
        "vflpsb  %%v19, %%v19       \n\t"
        "vflpsb  %%v20, %%v20       \n\t"
        "vflpsb  %%v21, %%v21       \n\t"
        "vflpsb  %%v22, %%v22       \n\t"
        "vflpsb  %%v23, %%v23       \n\t"

        "vfasb   %%v0,%%v0,%%v16    \n\t"
        "vfasb   %%v1,%%v1,%%v17    \n\t"
        "vfasb   %%v2,%%v2,%%v18    \n\t"
        "vfasb   %%v3,%%v3,%%v19    \n\t"
        "vfasb   %%v0,%%v0,%%v20    \n\t"
        "vfasb   %%v1,%%v1,%%v21    \n\t"
        "vfasb   %%v2,%%v2,%%v22    \n\t"
        "vfasb   %%v3,%%v3,%%v23    \n\t"
        
        "agfi  %%r1,256             \n\t"
        "brctg %%r0,0b              \n\t"
        "vfasb   %%v0,%%v0,%%v1     \n\t"
        "vfasb   %%v0,%%v0,%%v2     \n\t"
        "vfasb   %%v0,%%v0,%%v3     \n\t"
        "veslg   %%v1,%%v0,32       \n\t"
        "vfasb   %%v0,%%v0,%%v1     \n\t"
        "vrepf   %%v1,%%v0,2        \n\t"
        "aebr    %%f0,%%f1          \n\t"
        "ler     %0,%%f0                "
        :"=f"(asum)
        :"r"(n),"ZR"((const FLOAT (*)[n * 2])x)
        :"memory","cc","r0","r1","v0","v1","v2","v3","v16","v17","v18","v19","v20","v21","v22","v23"
    );

    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 & -32;
        if ( n1 > 0 )
        {

            sumf = casum_kernel_32(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);
}