OpenBLAS/kernel/mips/casum_msa.c

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

#define AND_VEC_W(in)   ((v4f32) ((v4i32) in & and_vec))

FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
{
    BLASLONG i, inc_x2;
    FLOAT sumf = 0.0;
    v4f32 src0, src1, src2, src3, src4, src5, src6, src7;
    v4f32 sum_abs0, sum_abs1, sum_abs2, sum_abs3;
    v4f32 zero_v = {0};
    v4i32 and_vec = {0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF};

    if (n <= 0 || inc_x <= 0) return (sumf);

    if (1 == inc_x)
    {
        if (n > 15)
        {
            n -= 16;

            LD_SP8_INC(x, 4, src0, src1, src2, src3, src4, src5, src6, src7);

            sum_abs0 = AND_VEC_W(src0);
            sum_abs1 = AND_VEC_W(src1);
            sum_abs2 = AND_VEC_W(src2);
            sum_abs3 = AND_VEC_W(src3);
            sum_abs0 += AND_VEC_W(src4);
            sum_abs1 += AND_VEC_W(src5);
            sum_abs2 += AND_VEC_W(src6);
            sum_abs3 += AND_VEC_W(src7);
        }
        else
        {
            sum_abs0 = zero_v;
            sum_abs1 = zero_v;
            sum_abs2 = zero_v;
            sum_abs3 = zero_v;
        }

        for (i = (n >> 4); i--;)
        {
            LD_SP8_INC(x, 4, src0, src1, src2, src3, src4, src5, src6, src7);

            sum_abs0 += AND_VEC_W(src0);
            sum_abs1 += AND_VEC_W(src1);
            sum_abs2 += AND_VEC_W(src2);
            sum_abs3 += AND_VEC_W(src3);
            sum_abs0 += AND_VEC_W(src4);
            sum_abs1 += AND_VEC_W(src5);
            sum_abs2 += AND_VEC_W(src6);
            sum_abs3 += AND_VEC_W(src7);
        }

        if (n & 15)
        {
            if ((n & 8) && (n & 4) && (n & 2))
            {
                LD_SP7_INC(x, 4, src0, src1, src2, src3, src4, src5, src6);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);
                sum_abs3 += AND_VEC_W(src3);
                sum_abs0 += AND_VEC_W(src4);
                sum_abs1 += AND_VEC_W(src5);
                sum_abs2 += AND_VEC_W(src6);

                sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

                sumf = sum_abs0[0];
                sumf += sum_abs0[1];
                sumf += sum_abs0[2];
                sumf += sum_abs0[3];
            }
            else if ((n & 8) && (n & 4))
            {
                LD_SP6_INC(x, 4, src0, src1, src2, src3, src4, src5);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);
                sum_abs3 += AND_VEC_W(src3);
                sum_abs0 += AND_VEC_W(src4);
                sum_abs1 += AND_VEC_W(src5);

                sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

                sumf = sum_abs0[0];
                sumf += sum_abs0[1];
                sumf += sum_abs0[2];
                sumf += sum_abs0[3];
            }
            else if ((n & 8) && (n & 2))
            {
                LD_SP5_INC(x, 4, src0, src1, src2, src3, src4);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);
                sum_abs3 += AND_VEC_W(src3);
                sum_abs0 += AND_VEC_W(src4);

                sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

                sumf = sum_abs0[0];
                sumf += sum_abs0[1];
                sumf += sum_abs0[2];
                sumf += sum_abs0[3];
            }
            else if ((n & 4) && (n & 2))
            {
                LD_SP3_INC(x, 4, src0, src1, src2);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);

                sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

                sumf = sum_abs0[0];
                sumf += sum_abs0[1];
                sumf += sum_abs0[2];
                sumf += sum_abs0[3];
            }
            else if (n & 8)
            {
                LD_SP4_INC(x, 4, src0, src1, src2, src3);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);
                sum_abs3 += AND_VEC_W(src3);

                sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

                sumf = sum_abs0[0];
                sumf += sum_abs0[1];
                sumf += sum_abs0[2];
                sumf += sum_abs0[3];
            }
            else if (n & 4)
            {
                LD_SP2_INC(x, 4, src0, src1);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);

                sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

                sumf = sum_abs0[0];
                sumf += sum_abs0[1];
                sumf += sum_abs0[2];
                sumf += sum_abs0[3];
            }
            else if (n & 2)
            {
                src0 = LD_SP(x); x += 4;

                sum_abs0 += AND_VEC_W(src0);

                sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

                sumf = sum_abs0[0];
                sumf += sum_abs0[1];
                sumf += sum_abs0[2];
                sumf += sum_abs0[3];
            }
            else
            {
                sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

                sumf = sum_abs0[0];
                sumf += sum_abs0[1];
                sumf += sum_abs0[2];
                sumf += sum_abs0[3];
            }

            if (n & 1)
            {
                sumf += fabsf(*(x + 0));
                sumf += fabsf(*(x + 1));
            }
        }
        else
        {
            sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

            sumf = sum_abs0[0];
            sumf += sum_abs0[1];
            sumf += sum_abs0[2];
            sumf += sum_abs0[3];
        }
    }
    else
    {
        inc_x2 = 2 * inc_x;

        if (n > 8)
        {
            n -= 8;

            LD_SP8_INC(x, inc_x2, src0, src1, src2, src3, src4, src5, src6, src7);

            sum_abs0 = AND_VEC_W(src0);
            sum_abs1 = AND_VEC_W(src1);
            sum_abs2 = AND_VEC_W(src2);
            sum_abs3 = AND_VEC_W(src3);
            sum_abs0 += AND_VEC_W(src4);
            sum_abs1 += AND_VEC_W(src5);
            sum_abs2 += AND_VEC_W(src6);
            sum_abs3 += AND_VEC_W(src7);
        }
        else
        {
            sum_abs0 = zero_v;
            sum_abs1 = zero_v;
            sum_abs2 = zero_v;
            sum_abs3 = zero_v;
        }

        for (i = (n >> 3); i--;)
        {
            LD_SP8_INC(x, inc_x2, src0, src1, src2, src3, src4, src5, src6, src7);

            sum_abs0 += AND_VEC_W(src0);
            sum_abs1 += AND_VEC_W(src1);
            sum_abs2 += AND_VEC_W(src2);
            sum_abs3 += AND_VEC_W(src3);
            sum_abs0 += AND_VEC_W(src4);
            sum_abs1 += AND_VEC_W(src5);
            sum_abs2 += AND_VEC_W(src6);
            sum_abs3 += AND_VEC_W(src7);
        }

        if (n & 7)
        {
            if ((n & 4) && (n & 2) && (n & 1))
            {
                LD_SP7_INC(x, inc_x2, src0, src1, src2, src3, src4, src5, src6);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);
                sum_abs3 += AND_VEC_W(src3);
                sum_abs0 += AND_VEC_W(src4);
                sum_abs1 += AND_VEC_W(src5);
                sum_abs2 += AND_VEC_W(src6);
            }
            else if ((n & 4) && (n & 2))
            {
                LD_SP6_INC(x, inc_x2, src0, src1, src2, src3, src4, src5);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);
                sum_abs3 += AND_VEC_W(src3);
                sum_abs0 += AND_VEC_W(src4);
                sum_abs1 += AND_VEC_W(src5);
            }
            else if ((n & 4) && (n & 1))
            {
                LD_SP5_INC(x, inc_x2, src0, src1, src2, src3, src4);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);
                sum_abs3 += AND_VEC_W(src3);
                sum_abs0 += AND_VEC_W(src4);
            }
            else if ((n & 2) && (n & 1))
            {
                LD_SP3_INC(x, inc_x2, src0, src1, src2);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);
            }
            else if (n & 4)
            {
                LD_SP4_INC(x, inc_x2, src0, src1, src2, src3);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
                sum_abs2 += AND_VEC_W(src2);
                sum_abs3 += AND_VEC_W(src3);
            }
            else if (n & 2)
            {
                LD_SP2_INC(x, inc_x2, src0, src1);

                sum_abs0 += AND_VEC_W(src0);
                sum_abs1 += AND_VEC_W(src1);
            }
            else if (n & 1)
            {
                src0 = LD_SP(x); x += inc_x2;

                sum_abs0 += AND_VEC_W(src0);
            }
        }

        sum_abs0 = sum_abs0 + sum_abs1 + sum_abs2 + sum_abs3;

        sumf = sum_abs0[0] + sum_abs0[1];
    }

    return (sumf);
}