OpenBLAS/kernel/zarch/zaxpy.c

/***************************************************************************
Copyright (c) 2017, The OpenBLAS Project
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 *****************************************************************************/


#include "common.h"

static void __attribute__ ((noinline)) zaxpy_kernel_8(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *alpha) {
    __asm__ ("pfd 1, 0(%1) \n\t"
            "pfd 2, 0(%2) \n\t"
            "vlrepg %%v28 , 0(%3) \n\t"
            "vlrepg %%v29, 8(%3)  \n\t"
            "srlg %3,%0,3         \n\t"
            "xgr  %%r1,%%r1       \n\t"
            ".align 16 \n\t"
            "1: \n\t"
            "pfd 1, 256(%%r1,%1) \n\t"
            "pfd 2, 256(%%r1,%2) \n\t"
            "vleg %%v16 ,  0(%%r1,%2),0  \n\t"
            "vleg %%v17 ,  8(%%r1,%2),0  \n\t"
            "vleg %%v16 , 16(%%r1,%2),1  \n\t"
            "vleg %%v17 , 24(%%r1,%2),1  \n\t"

            "vleg %%v18 , 32(%%r1,%2),0  \n\t"
            "vleg %%v19 , 40(%%r1,%2),0  \n\t"
            "vleg %%v18 , 48(%%r1,%2),1  \n\t"
            "vleg %%v19 , 56(%%r1,%2),1  \n\t"

            "vleg %%v24 ,  0(%%r1,%1),0  \n\t"
            "vleg %%v25 ,  8(%%r1,%1),0  \n\t"
            "vleg %%v24 , 16(%%r1,%1),1  \n\t"
            "vleg %%v25 , 24(%%r1,%1),1  \n\t"

            "vleg %%v26 , 32(%%r1,%1),0  \n\t"
            "vleg %%v27 , 40(%%r1,%1),0  \n\t"
            "vleg %%v26 , 48(%%r1,%1),1  \n\t"
            "vleg %%v27 , 56(%%r1,%1),1  \n\t"
#if !defined(CONJ)
            "vfmsdb %%v16,  %%v25, %%v29,%%v16  \n\t"
            "vfmadb %%v17,  %%v24, %%v29, %%v17 \n\t"
            "vfmsdb %%v18,  %%v27, %%v29, %%v18 \n\t"
            "vfmadb %%v19,  %%v26, %%v29, %%v19 \n\t"

            "vfmsdb %%v16, %%v24, %%v28 ,%%v16  \n\t"
            "vfmadb %%v17, %%v25, %%v28, %%v17  \n\t"
            "vfmsdb %%v18, %%v26, %%v28, %%v18  \n\t"
            "vfmadb %%v19, %%v27, %%v28, %%v19  \n\t"
#else
            "vfmadb %%v16, %%v25, %%v29, %%v16  \n\t"
            "vfmsdb %%v17, %%v25, %%v28, %%v17  \n\t"
            "vfmadb %%v18, %%v27, %%v29, %%v18  \n\t"
            "vfmsdb %%v19, %%v27, %%v28, %%v19  \n\t"
            "vfmadb %%v16, %%v24, %%v28, %%v16  \n\t"
            "vfmsdb %%v17, %%v24, %%v29, %%v17  \n\t"
            "vfmadb %%v18, %%v26, %%v28, %%v18  \n\t"
            "vfmsdb %%v19, %%v26, %%v29, %%v19  \n\t"

#endif 
            "vsteg %%v16 ,  0(%%r1,%2),0  \n\t"
            "vsteg %%v17 ,  8(%%r1,%2),0  \n\t"
            "vsteg %%v16 , 16(%%r1,%2),1  \n\t"
            "vsteg %%v17 , 24(%%r1,%2),1  \n\t"

            "vsteg %%v18 , 32(%%r1,%2),0  \n\t"
            "vsteg %%v19 , 40(%%r1,%2),0  \n\t"
            "vsteg %%v18 , 48(%%r1,%2),1  \n\t"
            "vsteg %%v19 , 56(%%r1,%2),1  \n\t"

            "vleg %%v20 , 64(%%r1,%2),0   \n\t"
            "vleg %%v21 , 72(%%r1,%2),0   \n\t"
            "vleg %%v20 , 80(%%r1,%2),1   \n\t"
            "vleg %%v21 , 88(%%r1,%2),1   \n\t"

            "vleg %%v22 ,  96(%%r1,%2),0  \n\t"
            "vleg %%v23 , 104(%%r1,%2),0  \n\t"
            "vleg %%v22 , 112(%%r1,%2),1  \n\t"
            "vleg %%v23 , 120(%%r1,%2),1  \n\t"

            "vleg %%v24 , 64(%%r1,%1),0   \n\t"
            "vleg %%v25 , 72(%%r1,%1),0   \n\t"
            "vleg %%v24 , 80(%%r1,%1),1   \n\t"
            "vleg %%v25 , 88(%%r1,%1),1   \n\t"

            "vleg %%v26 ,  96(%%r1,%1),0  \n\t"
            "vleg %%v27 , 104(%%r1,%1),0  \n\t"
            "vleg %%v26 , 112(%%r1,%1),1  \n\t"
            "vleg %%v27 , 120(%%r1,%1),1  \n\t"
#if !defined(CONJ)
            "vfmsdb %%v20,  %%v25, %%v29,%%v20   \n\t"
            "vfmadb %%v21,  %%v24, %%v29, %%v21  \n\t"
            "vfmsdb %%v22,  %%v27, %%v29, %%v22  \n\t"
            "vfmadb %%v23,  %%v26, %%v29, %%v23  \n\t"

            "vfmsdb %%v20, %%v24, %%v28 ,%%v20   \n\t"
            "vfmadb %%v21, %%v25, %%v28, %%v21   \n\t"
            "vfmsdb %%v22, %%v26, %%v28, %%v22   \n\t"
            "vfmadb %%v23, %%v27, %%v28, %%v23   \n\t"
#else
            "vfmadb %%v20, %%v25, %%v29, %%v20   \n\t"
            "vfmsdb %%v21, %%v25, %%v28, %%v21   \n\t"
            "vfmadb %%v22, %%v27, %%v29, %%v22   \n\t"
            "vfmsdb %%v23, %%v27, %%v28, %%v23   \n\t"
            "vfmadb %%v20, %%v24, %%v28, %%v20   \n\t"
            "vfmsdb %%v21, %%v24, %%v29, %%v21   \n\t"
            "vfmadb %%v22, %%v26, %%v28, %%v22   \n\t"
            "vfmsdb %%v23, %%v26, %%v29, %%v23   \n\t"
#endif 
            "vsteg %%v20 , 64(%%r1,%2),0   \n\t"
            "vsteg %%v21 , 72(%%r1,%2),0   \n\t"
            "vsteg %%v20 , 80(%%r1,%2),1   \n\t"
            "vsteg %%v21 , 88(%%r1,%2),1   \n\t"

            "vsteg %%v22 ,  96(%%r1,%2),0  \n\t"
            "vsteg %%v23 , 104(%%r1,%2),0  \n\t"
            "vsteg %%v22 , 112(%%r1,%2),1  \n\t"
            "vsteg %%v23 , 120(%%r1,%2),1  \n\t"

            "la %%r1,128(%%r1) \n\t"
            "brctg %3,1b"
            :
            : "r"(n), "a"(x), "a"(y), "a"(alpha)
            : "cc", "memory", "r1","v16",
            "v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27","v28","v29"
            );

}

int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da_r, FLOAT da_i, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2) {
    BLASLONG i = 0;
    BLASLONG ix = 0, iy = 0;
    FLOAT da[2];

    if (n <= 0) return (0);

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

        BLASLONG n1 = n & -8;

        if (n1) {
            da[0] = da_r;
            da[1] = da_i;
            zaxpy_kernel_8(n1, x, y, da);
            ix = 2 * n1;
        }
        i = n1;
        while (i < n) {
#if !defined(CONJ)
            y[ix] += (da_r * x[ix] - da_i * x[ix + 1]);
            y[ix + 1] += (da_r * x[ix + 1] + da_i * x[ix]);
#else
            y[ix] += (da_r * x[ix] + da_i * x[ix + 1]);
            y[ix + 1] -= (da_r * x[ix + 1] - da_i * x[ix]);
#endif
            i++;
            ix += 2;

        }
        return (0);


    }

    inc_x *= 2;
    inc_y *= 2;

    while (i < n) {

#if !defined(CONJ)
        y[iy] += (da_r * x[ix] - da_i * x[ix + 1]);
        y[iy + 1] += (da_r * x[ix + 1] + da_i * x[ix]);
#else
        y[iy] += (da_r * x[ix] + da_i * x[ix + 1]);
        y[iy + 1] -= (da_r * x[ix + 1] - da_i * x[ix]);
#endif
        ix += inc_x;
        iy += inc_y;
        i++;

    }
    return (0);

}