OpenBLAS/kernel/mips/saxpy_msa.c

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#include "common.h"
#include "macros_msa.h"

#if !defined(CONJ)
    #define OP0  +=
    #define OP1  -=
    #define OP2  +=
#else
    #define OP0  -=
    #define OP1  +=
    #define OP2  -=
#endif

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;
    FLOAT *py;
    v4f32 x0, x1, x2, x3, x4, x5, x6, x7, y0, y1, y2, y3, y4, y5, y6, y7;
    v4f32 da_vec, zero_v = {0};

    if ((n < 0) || (da == 0.0))  return(0);

    py = y;

    if ((1 == inc_x) && (1 == inc_y))
    {
        FLOAT *x_pref, *y_pref;
        BLASLONG pref_offset;

        pref_offset = (BLASLONG)x & (L1_DATA_LINESIZE - 1);
        if (pref_offset > 0)
        {
            pref_offset = L1_DATA_LINESIZE - pref_offset;
            pref_offset = pref_offset / sizeof(FLOAT);
        }
        x_pref = x + pref_offset + 64;

        pref_offset = (BLASLONG)y & (L1_DATA_LINESIZE - 1);
        if (pref_offset > 0)
        {
            pref_offset = L1_DATA_LINESIZE - pref_offset;
            pref_offset = pref_offset / sizeof(FLOAT);
        }
        y_pref = y + pref_offset + 64;

        da_vec = COPY_FLOAT_TO_VECTOR(da);

        for (i = (n >> 5); i--;)
        {
            PREF_OFFSET(x_pref, 0);
            PREF_OFFSET(x_pref, 32);
            PREF_OFFSET(x_pref, 64);
            PREF_OFFSET(x_pref, 96);
            PREF_OFFSET(y_pref, 0);
            PREF_OFFSET(y_pref, 32);
            PREF_OFFSET(y_pref, 64);
            PREF_OFFSET(y_pref, 96);
            x_pref += 32;
            y_pref += 32;

            LD_SP8_INC(x, 4, x0, x1, x2, x3, x4, x5, x6, x7);
            LD_SP8_INC(py, 4, y0, y1, y2, y3, y4, y5, y6, y7);
            FMADD4(x0, x1, x2, x3, da_vec, y0, y1, y2, y3);
            FMADD4(x4, x5, x6, x7, da_vec, y4, y5, y6, y7);
            ST_SP8_INC(y0, y1, y2, y3, y4, y5, y6, y7, y, 4);
        }

        if (n & 31)
        {
            if (n & 16)
            {
                LD_SP4_INC(x, 4, x0, x1, x2, x3);
                LD_SP4_INC(py, 4, y0, y1, y2, y3);
                FMADD4(x0, x1, x2, x3, da_vec, y0, y1, y2, y3);
                ST_SP4_INC(y0, y1, y2, y3, y, 4);
            }

            if (n & 8)
            {
                LD_SP2_INC(x, 4, x0, x1);
                LD_SP2_INC(py, 4, y0, y1);
                FMADD2(x0, x1, da_vec, y0, y1);
                ST_SP2_INC(y0, y1, y, 4);
            }

            if (n & 4)
            {
                x0 = LD_SP(x); x += 4;
                y0 = LD_SP(py); py += 4;
                y0 += da_vec * x0;
                ST_SP(y0, y); y += 4;
            }

            if (n & 2)
            {
                FMADD2(x[0], x[1], da, y[0], y[1]);
                x += 2;
                y += 2;
            }

            if (n & 1)
            {
                y[0] += da * x[0];
            }
        }
    }
    else if (1 == inc_y)
    {
        da_vec = COPY_FLOAT_TO_VECTOR(da);

        for (i = (n >> 4); i--;)
        {
            x0 = (v4f32) __msa_insert_w((v4i32) zero_v, 0, *((int *) x));
            x += inc_x;
            x0 = (v4f32) __msa_insert_w((v4i32) x0, 1, *((int *) x));
            x += inc_x;
            x0 = (v4f32) __msa_insert_w((v4i32) x0, 2, *((int *) x));
            x += inc_x;
            x0 = (v4f32) __msa_insert_w((v4i32) x0, 3, *((int *) x));
            x += inc_x;
            x1 = (v4f32) __msa_insert_w((v4i32) zero_v, 0, *((int *) x));
            x += inc_x;
            x1 = (v4f32) __msa_insert_w((v4i32) x1, 1, *((int *) x));
            x += inc_x;
            x1 = (v4f32) __msa_insert_w((v4i32) x1, 2, *((int *) x));
            x += inc_x;
            x1 = (v4f32) __msa_insert_w((v4i32) x1, 3, *((int *) x));
            x += inc_x;
            x2 = (v4f32) __msa_insert_w((v4i32) zero_v, 0, *((int *) x));
            x += inc_x;
            x2 = (v4f32) __msa_insert_w((v4i32) x2, 1, *((int *) x));
            x += inc_x;
            x2 = (v4f32) __msa_insert_w((v4i32) x2, 2, *((int *) x));
            x += inc_x;
            x2 = (v4f32) __msa_insert_w((v4i32) x2, 3, *((int *) x));
            x += inc_x;
            x3 = (v4f32) __msa_insert_w((v4i32) zero_v, 0, *((int *) x));
            x += inc_x;
            x3 = (v4f32) __msa_insert_w((v4i32) x3, 1, *((int *) x));
            x += inc_x;
            x3 = (v4f32) __msa_insert_w((v4i32) x3, 2, *((int *) x));
            x += inc_x;
            x3 = (v4f32) __msa_insert_w((v4i32) x3, 3, *((int *) x));
            x += inc_x;

            LD_SP4_INC(py, 4, y0, y1, y2, y3);
            FMADD4(x0, x1, x2, x3, da_vec, y0, y1, y2, y3);
            ST_SP4_INC(y0, y1, y2, y3, y, 4);
        }

        if (n & 15)
        {
            if (n & 8)
            {
                x0 = (v4f32) __msa_insert_w((v4i32) zero_v, 0, *((int *) x));
                x += inc_x;
                x0 = (v4f32) __msa_insert_w((v4i32) x0, 1, *((int *) x));
                x += inc_x;
                x0 = (v4f32) __msa_insert_w((v4i32) x0, 2, *((int *) x));
                x += inc_x;
                x0 = (v4f32) __msa_insert_w((v4i32) x0, 3, *((int *) x));
                x += inc_x;
                x1 = (v4f32) __msa_insert_w((v4i32) zero_v, 0, *((int *) x));
                x += inc_x;
                x1 = (v4f32) __msa_insert_w((v4i32) x1, 1, *((int *) x));
                x += inc_x;
                x1 = (v4f32) __msa_insert_w((v4i32) x1, 2, *((int *) x));
                x += inc_x;
                x1 = (v4f32) __msa_insert_w((v4i32) x1, 3, *((int *) x));
                x += inc_x;

                LD_SP2_INC(py, 4, y0, y1);
                FMADD2(x0, x1, da_vec, y0, y1);
                ST_SP2_INC(y0, y1, y, 4);
            }

            if (n & 4)
            {
                x0 = (v4f32) __msa_insert_w((v4i32) zero_v, 0, *((int *) x));
                x += inc_x;
                x0 = (v4f32) __msa_insert_w((v4i32) x0, 1, *((int *) x));
                x += inc_x;
                x0 = (v4f32) __msa_insert_w((v4i32) x0, 2, *((int *) x));
                x += inc_x;
                x0 = (v4f32) __msa_insert_w((v4i32) x0, 3, *((int *) x));
                x += inc_x;

                y0 = LD_SP(py); py += 4;
                y0 += da_vec * x0;
                ST_SP(y0, y); y += 4;
            }

            if (n & 2)
            {
                FMADD2(x[0], x[inc_x], da, y[0], y[1]);

                x += 2 * inc_x;
                y += 2;
            }

            if (n & 1)
            {
                y[0] += da * x[0];
            }
        }
    }
    else
    {
        FLOAT x0, x1, x2, x3, y0, y1, y2, y3;

        for (i = (n >> 2); i--;)
        {
            LD_GP4_INC(x, inc_x, x0, x1, x2, x3);
            LD_GP4_INC(py, inc_y, y0, y1, y2, y3);
            FMADD4(x0, x1, x2, x3, da, y0, y1, y2, y3);
            ST_GP4_INC(y0, y1, y2, y3, y, inc_y);
        }

        if (n & 3)
        {
            if (n & 2)
            {
                LD_GP2_INC(x, inc_x, x0, x1);
                LD_GP2_INC(py, inc_y, y0, y1);
                FMADD2(x0, x1, da, y0, y1);
                ST_GP2_INC(y0, y1, y, inc_y);
            }

            if (n & 1)
            {
                *y += da * *x;
            }
        }
    }

    return (0);
}