OpenBLAS/kernel/zarch/zdot.c

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#include "common.h"
#if defined(Z13)

static void zdot_kernel_8(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *d) {

    __asm__ volatile(
            "pfd   1, 0(%[ptr_x_tmp]) \n\t"
            "pfd   1, 0(%[ptr_y_tmp]) \n\t"
            "vzero %%v24  \n\t"
            "vzero %%v25  \n\t"
            "vzero %%v26  \n\t"
            "vzero %%v27  \n\t"
            "srlg  %[n_tmp],%[n_tmp],3      \n\t"
            "xgr   %%r1,%%r1       \n\t"
            ".align 16 \n\t"
            "1:     \n\t"
            "pfd    1,    256(%%r1,%[ptr_x_tmp])  \n\t"
            "pfd    1,    256(%%r1,%[ptr_y_tmp])  \n\t"
            "vl     %%v16,  0(%%r1,%[ptr_x_tmp])  \n\t"
            "vl     %%v17, 16(%%r1,%[ptr_x_tmp])  \n\t"
            "vl     %%v18, 32(%%r1,%[ptr_x_tmp])  \n\t"
            "vl     %%v19, 48(%%r1,%[ptr_x_tmp])  \n\t"
            "vl     %%v28,  0(%%r1,%[ptr_y_tmp])  \n\t"
            "vl     %%v29, 16(%%r1,%[ptr_y_tmp])  \n\t"
            "vl     %%v30, 32(%%r1,%[ptr_y_tmp])  \n\t"
            "vl     %%v31, 48(%%r1,%[ptr_y_tmp])  \n\t"
            "vpdi   %%v20,%%v16,%%v16,4 \n\t"
            "vpdi   %%v21,%%v17,%%v17,4 \n\t"
            "vpdi   %%v22,%%v18,%%v18,4 \n\t"
            "vpdi   %%v23,%%v19,%%v19,4 \n\t"


            "vfmadb %%v24,%%v16,%%v28,%%v24  \n\t"
            "vfmadb %%v25,%%v20,%%v28,%%v25  \n\t"
            "vfmadb %%v26,%%v17,%%v29,%%v26  \n\t"
            "vfmadb %%v27,%%v21,%%v29,%%v27  \n\t"
            "vfmadb %%v24,%%v18,%%v30,%%v24  \n\t"
            "vfmadb %%v25,%%v22,%%v30,%%v25  \n\t"
            "vfmadb %%v26,%%v19,%%v31,%%v26  \n\t"
            "vfmadb %%v27,%%v23,%%v31,%%v27  \n\t"



            "vl     %%v16, 64(%%r1,%[ptr_x_tmp]) \n\t"
            "vl     %%v17, 80(%%r1,%[ptr_x_tmp]) \n\t"
            "vl     %%v18, 96(%%r1,%[ptr_x_tmp]) \n\t"
            "vl     %%v19,112(%%r1,%[ptr_x_tmp]) \n\t"
            "vl     %%v28, 64(%%r1,%[ptr_y_tmp]) \n\t"
            "vl     %%v29, 80(%%r1,%[ptr_y_tmp]) \n\t"
            "vl     %%v30, 96(%%r1,%[ptr_y_tmp]) \n\t"
            "vl     %%v31,112(%%r1,%[ptr_y_tmp]) \n\t"
            "vpdi   %%v20,%%v16,%%v16,4 \n\t"
            "vpdi   %%v21,%%v17,%%v17,4 \n\t"
            "vpdi   %%v22,%%v18,%%v18,4 \n\t"
            "vpdi   %%v23,%%v19,%%v19,4 \n\t"
            "vfmadb %%v24,%%v16,%%v28,%%v24  \n\t"
            "vfmadb %%v25,%%v20,%%v28,%%v25  \n\t"
            "vfmadb %%v26,%%v17,%%v29,%%v26  \n\t"
            "vfmadb %%v27,%%v21,%%v29,%%v27  \n\t"
            "vfmadb %%v24,%%v18,%%v30,%%v24  \n\t"
            "vfmadb %%v25,%%v22,%%v30,%%v25  \n\t"
            "vfmadb %%v26,%%v19,%%v31,%%v26  \n\t"
            "vfmadb %%v27,%%v23,%%v31,%%v27  \n\t"


            "la     %%r1,128(%%r1)       \n\t"
            "brctg  %[n_tmp],1b          \n\t"
            "vfadb  %%v24,%%v26,%%v24    \n\t"
            "vfadb  %%v25,%%v25,%%v27    \n\t"
            "vsteg  %%v24, 0(%[ptr_d]),0    \n\t"
            "vsteg  %%v24, 8(%[ptr_d]),1    \n\t"
            "vsteg  %%v25,16(%[ptr_d]),1    \n\t"
            "vsteg  %%v25,24(%[ptr_d]),0    \n\t"
            : [mem_out] "=m"(*(double (*)[4])d ) ,[n_tmp] "+&r"(n) 
            : [mem_x] "m"( *(const double (*)[2*n])x),
              [mem_y] "m"( *(const double (*)[2*n])y),
              [ptr_x_tmp] "a"(x), [ptr_y_tmp] "a"(y), [ptr_d] "a"(d)
            : "cc", "r1","v16",
            "v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27","v28","v29","v30","v31" 
            );

}

#else

static  void zdot_kernel_8(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *d) {
    BLASLONG register i = 0;
    FLOAT dot[4] = {0.0, 0.0, 0.0, 0.0};
    BLASLONG j = 0;

    while (i < n) {

        dot[0] += x[j] * y[j];
        dot[1] += x[j + 1] * y[j + 1];
        dot[2] += x[j] * y[j + 1];
        dot[3] += x[j + 1] * y[j];

        dot[0] += x[j + 2] * y[j + 2];
        dot[1] += x[j + 3] * y[j + 3];
        dot[2] += x[j + 2] * y[j + 3];
        dot[3] += x[j + 3] * y[j + 2];

        dot[0] += x[j + 4] * y[j + 4];
        dot[1] += x[j + 5] * y[j + 5];
        dot[2] += x[j + 4] * y[j + 5];
        dot[3] += x[j + 5] * y[j + 4];

        dot[0] += x[j + 6] * y[j + 6];
        dot[1] += x[j + 7] * y[j + 7];
        dot[2] += x[j + 6] * y[j + 7];
        dot[3] += x[j + 7] * y[j + 6];

        j += 8;
        i += 4;

    }
    d[0] = dot[0];
    d[1] = dot[1];
    d[2] = dot[2];
    d[3] = dot[3];

}

#endif

OPENBLAS_COMPLEX_FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y) {
    BLASLONG i = 0;
    BLASLONG ix=0, iy=0;
    OPENBLAS_COMPLEX_FLOAT result;
    FLOAT dot[4] __attribute__ ((aligned(16))) = {0.0, 0.0, 0.0, 0.0};

    if (n <= 0) {
        CREAL(result) = 0.0;
        CIMAG(result) = 0.0;
        return (result);

    }

    if ((inc_x == 1) && (inc_y == 1)) {

        BLASLONG n1 = n & -8;
        BLASLONG j=0; 

        if (n1){
            zdot_kernel_8(n1, x, y, dot);
            i = n1;
            j = n1 <<1;
        }
 

        while (i < n) {

            dot[0] += x[j] * y[j];
            dot[1] += x[j + 1] * y[j + 1];
            dot[2] += x[j] * y[j + 1];
            dot[3] += x[j + 1] * y[j];

            j += 2;
            i++;

        }


    } else {
        i = 0;
        ix = 0;
        iy = 0;
        inc_x <<= 1;
        inc_y <<= 1;
        while (i < n) {

            dot[0] += x[ix] * y[iy];
            dot[1] += x[ix + 1] * y[iy + 1];
            dot[2] += x[ix] * y[iy + 1];
            dot[3] += x[ix + 1] * y[iy];

            ix += inc_x;
            iy += inc_y;
            i++;

        }
    }

#if !defined(CONJ)
    CREAL(result) = dot[0] - dot[1];
    CIMAG(result) = dot[2] + dot[3];
#else
    CREAL(result) = dot[0] + dot[1];
    CIMAG(result) = dot[2] - dot[3];

#endif

    return (result);

}