OpenBLAS/kernel/mips/cdot_msa.c

/*******************************************************************************
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#include "common.h"
#include "macros_msa.h"

#if !defined(CONJ)
    #define OP1     -=
    #define OP2     +=
    #define OP3     -
    #define OP4     +
#else
    #define OP1     +=
    #define OP2     -=
    #define OP3     +
    #define OP4     -
#endif

OPENBLAS_COMPLEX_FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
{
    BLASLONG i = 0;
    FLOAT dot[2];
    BLASLONG inc_x2, inc_y2;
    FLOAT x0, x1, x2, x3, x4, x5, x6, x7, y0, y1, y2, y3, y4, y5, y6, y7;
    v4f32 vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7, vx8, vx9, vx10, vx11;
    v4f32 vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7, vy8, vy9, vy10, vy11;
    v4f32 vx0r, vx0i, vx1r, vx1i, vx2r, vx2i, vx3r, vx3i;
    v4f32 vy0r, vy0i, vy1r, vy1i, vy2r, vy2i, vy3r, vy3i;
    v4f32 dot0 = {0, 0, 0, 0};
    v4f32 dot1 = {0, 0, 0, 0};
    v4f32 dot2 = {0, 0, 0, 0};
    v4f32 dot3 = {0, 0, 0, 0};
    v4f32 dot4 = {0, 0, 0, 0};
    v4f32 dot5 = {0, 0, 0, 0};
    v4f32 dot6 = {0, 0, 0, 0};
    v4f32 dot7 = {0, 0, 0, 0};
    OPENBLAS_COMPLEX_FLOAT result;

    dot[0] = 0.0;
    dot[1] = 0.0;

    CREAL(result) = 0.0;
    CIMAG(result) = 0.0;

    if (n < 1) return (result);

    if ((1 == inc_x) && (1 == inc_y))
    {
        if (n > 15)
        {
            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 + 16;

            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 + 16;

            LD_SP4_INC(x, 4, vx0, vx1, vx2, vx3);
            LD_SP4_INC(y, 4, vy0, vy1, vy2, vy3);

            PCKEVOD_W2_SP(vx1, vx0, vx0r, vx0i);
            PCKEVOD_W2_SP(vy1, vy0, vy0r, vy0i);

            for (i = (n >> 4) - 1; 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;

                vx4 = LD_SP(x); x += 4;
                vx1r = (v4f32) __msa_pckev_w((v4i32) vx3, (v4i32) vx2);
                dot0 += (vx0r * vy0r);
                vx5 = LD_SP(x); x += 4;
                vx1i = (v4f32) __msa_pckod_w((v4i32) vx3, (v4i32) vx2);
                dot1 OP2 (vx0i * vy0r);
                vy4 = LD_SP(y); y += 4;
                vy1r = (v4f32) __msa_pckev_w((v4i32) vy3, (v4i32) vy2);
                dot2 += (vx1r * vy1r);
                vy5 = LD_SP(y); y += 4;
                vy1i = (v4f32) __msa_pckod_w((v4i32) vy3, (v4i32) vy2);
                dot3 OP2 (vx1i * vy1r);
                vx6 = LD_SP(x); x += 4;
                vx7 = LD_SP(x); x += 4;
                vy6 = LD_SP(y); y += 4;
                vy7 = LD_SP(y); y += 4;
                vx8 = LD_SP(x); x += 4;
                dot0 OP1 (vx0i * vy0i);
                vx9 = LD_SP(x); x += 4;
                vx2r = (v4f32) __msa_pckev_w((v4i32) vx5, (v4i32) vx4);
                dot1 += (vx0r * vy0i);
                vy8 = LD_SP(y); y += 4;
                vx2i = (v4f32) __msa_pckod_w((v4i32) vx5, (v4i32) vx4);
                dot2 OP1 (vx1i * vy1i);
                vy9 = LD_SP(y); y += 4;
                vy2r = (v4f32) __msa_pckev_w((v4i32) vy5, (v4i32) vy4);
                dot3 += (vx1r * vy1i);
                vx10 = LD_SP(x); x += 4;
                vy2i = (v4f32) __msa_pckod_w((v4i32) vy5, (v4i32) vy4);
                vx11 = LD_SP(x); x += 4;
                vx3r = (v4f32) __msa_pckev_w((v4i32) vx7, (v4i32) vx6);
                dot4 += (vx2r * vy2r);
                vy10 = LD_SP(y); y += 4;
                vx3i = (v4f32) __msa_pckod_w((v4i32) vx7, (v4i32) vx6);
                dot5 OP2 (vx2i * vy2r);
                vy11 = LD_SP(y); y += 4;
                vy3r = (v4f32) __msa_pckev_w((v4i32) vy7, (v4i32) vy6);
                vy3i = (v4f32) __msa_pckod_w((v4i32) vy7, (v4i32) vy6);
                dot6 += (vx3r * vy3r);
                vx0r = (v4f32) __msa_pckev_w((v4i32) vx9, (v4i32) vx8);
                dot7 OP2 (vx3i * vy3r);
                vx0i = (v4f32) __msa_pckod_w((v4i32) vx9, (v4i32) vx8);
                vy0r = (v4f32) __msa_pckev_w((v4i32) vy9, (v4i32) vy8);
                vx2 = vx10;
                vy0i = (v4f32) __msa_pckod_w((v4i32) vy9, (v4i32) vy8);
                vx3 = vx11;
                dot4 OP1 (vx2i * vy2i);
                vy2 = vy10;
                dot5 += (vx2r * vy2i);
                vy3 = vy11;
                dot6 OP1 (vx3i * vy3i);
                dot7 += (vx3r * vy3i);
            }

            vx4 = LD_SP(x); x += 4;
            vx1r = (v4f32) __msa_pckev_w((v4i32) vx3, (v4i32) vx2);
            dot0 += (vx0r * vy0r);
            vx5 = LD_SP(x); x += 4;
            vx1i = (v4f32) __msa_pckod_w((v4i32) vx3, (v4i32) vx2);
            dot1 OP2 (vx0i * vy0r);
            vy4 = LD_SP(y); y += 4;
            vy1r = (v4f32) __msa_pckev_w((v4i32) vy3, (v4i32) vy2);
            dot2 += (vx1r * vy1r);
            vy5 = LD_SP(y); y += 4;
            vy1i = (v4f32) __msa_pckod_w((v4i32) vy3, (v4i32) vy2);
            dot3 OP2 (vx1i * vy1r);
            vx6 = LD_SP(x); x += 4;
            vx7 = LD_SP(x); x += 4;
            vy6 = LD_SP(y); y += 4;
            vy7 = LD_SP(y); y += 4;
            dot0 OP1 (vx0i * vy0i);
            vx2r = (v4f32) __msa_pckev_w((v4i32) vx5, (v4i32) vx4);
            dot1 += (vx0r * vy0i);
            vx2i = (v4f32) __msa_pckod_w((v4i32) vx5, (v4i32) vx4);
            dot2 OP1 (vx1i * vy1i);
            vy2r = (v4f32) __msa_pckev_w((v4i32) vy5, (v4i32) vy4);
            dot3 += (vx1r * vy1i);
            vy2i = (v4f32) __msa_pckod_w((v4i32) vy5, (v4i32) vy4);
            vx3r = (v4f32) __msa_pckev_w((v4i32) vx7, (v4i32) vx6);
            dot4 += (vx2r * vy2r);
            vx3i = (v4f32) __msa_pckod_w((v4i32) vx7, (v4i32) vx6);
            dot5 OP2 (vx2i * vy2r);
            vy3r = (v4f32) __msa_pckev_w((v4i32) vy7, (v4i32) vy6);
            vy3i = (v4f32) __msa_pckod_w((v4i32) vy7, (v4i32) vy6);
            dot6 += (vx3r * vy3r);
            dot7 OP2 (vx3i * vy3r);
            dot4 OP1 (vx2i * vy2i);
            dot5 += (vx2r * vy2i);
            dot6 OP1 (vx3i * vy3i);
            dot7 += (vx3r * vy3i);
        }

        if (n & 15)
        {
            if (n & 8)
            {
                LD_SP4_INC(x, 4, vx0, vx1, vx2, vx3);
                LD_SP4_INC(y, 4, vy0, vy1, vy2, vy3);

                PCKEVOD_W2_SP(vx1, vx0, vx0r, vx0i);
                PCKEVOD_W2_SP(vx3, vx2, vx1r, vx1i);

                PCKEVOD_W2_SP(vy1, vy0, vy0r, vy0i);
                PCKEVOD_W2_SP(vy3, vy2, vy1r, vy1i);

                dot0 += (vx0r * vy0r);
                dot0 OP1 (vx0i * vy0i);
                dot1 OP2 (vx0i * vy0r);
                dot1 += (vx0r * vy0i);

                dot2 += (vx1r * vy1r);
                dot2 OP1 (vx1i * vy1i);
                dot3 OP2 (vx1i * vy1r);
                dot3 += (vx1r * vy1i);
            }

            if (n & 4)
            {
                LD_SP2_INC(x, 4, vx0, vx1);
                LD_SP2_INC(y, 4, vy0, vy1);
                PCKEVOD_W2_SP(vx1, vx0, vx0r, vx0i);
                PCKEVOD_W2_SP(vy1, vy0, vy0r, vy0i);

                dot0 += (vx0r * vy0r);
                dot0 OP1 (vx0i * vy0i);
                dot1 OP2 (vx0i * vy0r);
                dot1 += (vx0r * vy0i);
            }

            if (n & 2)
            {
                LD_GP4_INC(x, 1, x0, x1, x2, x3);
                LD_GP4_INC(y, 1, y0, y1, y2, y3);

                dot[0] += (x0 * y0 OP3 x1 * y1);
                dot[1] OP2 (x1 * y0 OP4 x0 * y1);

                dot[0] += (x2 * y2 OP3 x3 * y3);
                dot[1] OP2 (x3 * y2 OP4 x2 * y3);
            }

            if (n & 1)
            {
                LD_GP2_INC(x, 1, x0, x1);
                LD_GP2_INC(y, 1, y0, y1);

                dot[0] += (x0 * y0 OP3 x1 * y1);
                dot[1] OP2 (x1 * y0 OP4 x0 * y1);
            }
        }

        dot0 += dot2 + dot4 + dot6;
        dot1 += dot3 + dot5 + dot7;

        dot[0] += (dot0[0] + dot0[1] + dot0[2] + dot0[3]);
        dot[1] += (dot1[0] + dot1[1] + dot1[2] + dot1[3]);
    }
    else
    {
        inc_x2 = 2 * inc_x;
        inc_y2 = 2 * inc_y;

        for (i = (n >> 2); i--;)
        {
            x0 = *x;
            x1 = *(x + 1);
            x += inc_x2;
            x2 = *x;
            x3 = *(x + 1);
            x += inc_x2;
            x4 = *x;
            x5 = *(x + 1);
            x += inc_x2;
            x6 = *x;
            x7 = *(x + 1);
            x += inc_x2;

            y0 = *y;
            y1 = *(y + 1);
            y += inc_y2;
            y2 = *y;
            y3 = *(y + 1);
            y += inc_y2;
            y4 = *y;
            y5 = *(y + 1);
            y += inc_y2;
            y6 = *y;
            y7 = *(y + 1);
            y += inc_y2;

            dot[0] += (x0 * y0 OP3 x1 * y1);
            dot[1] OP2 (x1 * y0 OP4 x0 * y1);

            dot[0] += (x2 * y2 OP3 x3 * y3);
            dot[1] OP2 (x3 * y2 OP4 x2 * y3);

            dot[0] += (x4 * y4 OP3 x5 * y5);
            dot[1] OP2 (x5 * y4 OP4 x4 * y5);

            dot[0] += (x6 * y6 OP3 x7 * y7);
            dot[1] OP2 (x7 * y6 OP4 x6 * y7);
        }

        if (n & 2)
        {
            x0 = *x;
            x1 = *(x + 1);
            x += inc_x2;
            x2 = *x;
            x3 = *(x + 1);
            x += inc_x2;

            y0 = *y;
            y1 = *(y + 1);
            y += inc_y2;
            y2 = *y;
            y3 = *(y + 1);
            y += inc_y2;

            dot[0] += (x0 * y0 OP3 x1 * y1);
            dot[1] OP2 (x1 * y0 OP4 x0 * y1);

            dot[0] += (x2 * y2 OP3 x3 * y3);
            dot[1] OP2 (x3 * y2 OP4 x2 * y3);
        }

        if (n & 1)
        {
            x0 = *x;
            x1 = *(x + 1);
            x += inc_x2;

            y0 = *y;
            y1 = *(y + 1);
            y += inc_y2;

            dot[0] += (x0 * y0 OP3 x1 * y1);
            dot[1] OP2 (x1 * y0 OP4 x0 * y1);
        }
    }

    CREAL(result) = dot[0];
    CIMAG(result) = dot[1];

    return (result);
}