#include "../gmx_blas.h"
#include "../gmx_lapack.h"


void F77_FUNC(slarfb, SLARFB)(const char* side,
                              const char* trans,
                              const char* direct,
                              const char* storev,
                              int*        m,
                              int*        n,
                              int*        k,
                              float*      v,
                              int*        ldv,
                              float*      t,
                              int*        ldt,
                              float*      c__,
                              int*        ldc,
                              float*      work,
                              int*        ldwork)
{
    int c_dim1, c_offset, t_dim1, t_offset, v_dim1, v_offset, work_dim1, work_offset, i__1, i__2;

    int   i__, j;
    char  transt[1];
    int   c__1     = 1;
    float one      = 1.0;
    float minusone = -1.0;

    v_dim1   = *ldv;
    v_offset = 1 + v_dim1;
    v -= v_offset;
    t_dim1   = *ldt;
    t_offset = 1 + t_dim1;
    t -= t_offset;
    c_dim1   = *ldc;
    c_offset = 1 + c_dim1;
    c__ -= c_offset;
    work_dim1   = *ldwork;
    work_offset = 1 + work_dim1;
    work -= work_offset;

    if (*m <= 0 || *n <= 0)
    {
        return;
    }
    if (*trans == 'N' || *trans == 'n')
    {
        *(unsigned char*)transt = 'T';
    }
    else
    {
        *(unsigned char*)transt = 'N';
    }

    if (*storev == 'C' || *storev == 'c')
    {

        if (*direct == 'F' || *direct == 'f')
        {
            if (*side == 'l' || *side == 'L')
            {

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    F77_FUNC(scopy, SCOPY)
                    (n, &c__[j + c_dim1], ldc, &work[j * work_dim1 + 1], &c__1);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", "No transpose", "Unit", n, k, &one, &v[v_offset], ldv, &work[work_offset], ldwork);
                if (*m > *k)
                {

                    i__1 = *m - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("Transpose",
                     "No transpose",
                     n,
                     k,
                     &i__1,
                     &one,
                     &c__[*k + 1 + c_dim1],
                     ldc,
                     &v[*k + 1 + v_dim1],
                     ldv,
                     &one,
                     &work[work_offset],
                     ldwork);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", transt, "Non-unit", n, k, &one, &t[t_offset], ldt, &work[work_offset], ldwork);

                if (*m > *k)
                {
                    i__1 = *m - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "Transpose",
                     &i__1,
                     n,
                     k,
                     &minusone,
                     &v[*k + 1 + v_dim1],
                     ldv,
                     &work[work_offset],
                     ldwork,
                     &one,
                     &c__[*k + 1 + c_dim1],
                     ldc);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", "Transpose", "Unit", n, k, &one, &v[v_offset], ldv, &work[work_offset], ldwork);

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    i__2 = *n;
                    for (i__ = 1; i__ <= i__2; ++i__)
                    {
                        c__[j + i__ * c_dim1] -= work[i__ + j * work_dim1];
                    }
                }
            }
            else if (*side == 'r' || *side == 'R')
            {

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    F77_FUNC(scopy, SCOPY)
                    (m, &c__[j * c_dim1 + 1], &c__1, &work[j * work_dim1 + 1], &c__1);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", "No transpose", "Unit", m, k, &one, &v[v_offset], ldv, &work[work_offset], ldwork);
                if (*n > *k)
                {

                    i__1 = *n - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "No transpose",
                     m,
                     k,
                     &i__1,
                     &one,
                     &c__[(*k + 1) * c_dim1 + 1],
                     ldc,
                     &v[*k + 1 + v_dim1],
                     ldv,
                     &one,
                     &work[work_offset],
                     ldwork);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", trans, "Non-unit", m, k, &one, &t[t_offset], ldt, &work[work_offset], ldwork);

                if (*n > *k)
                {
                    i__1 = *n - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "Transpose",
                     m,
                     &i__1,
                     k,
                     &minusone,
                     &work[work_offset],
                     ldwork,
                     &v[*k + 1 + v_dim1],
                     ldv,
                     &one,
                     &c__[(*k + 1) * c_dim1 + 1],
                     ldc);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", "Transpose", "Unit", m, k, &one, &v[v_offset], ldv, &work[work_offset], ldwork);

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    i__2 = *m;
                    for (i__ = 1; i__ <= i__2; ++i__)
                    {
                        c__[i__ + j * c_dim1] -= work[i__ + j * work_dim1];
                    }
                }
            }
        }
        else
        {

            if (*side == 'l' || *side == 'L')
            {
                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    F77_FUNC(scopy, SCOPY)
                    (n, &c__[*m - *k + j + c_dim1], ldc, &work[j * work_dim1 + 1], &c__1);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", "No transpose", "Unit", n, k, &one, &v[*m - *k + 1 + v_dim1], ldv, &work[work_offset], ldwork);
                if (*m > *k)
                {
                    i__1 = *m - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("Transpose",
                     "No transpose",
                     n,
                     k,
                     &i__1,
                     &one,
                     &c__[c_offset],
                     ldc,
                     &v[v_offset],
                     ldv,
                     &one,
                     &work[work_offset],
                     ldwork);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", transt, "Non-unit", n, k, &one, &t[t_offset], ldt, &work[work_offset], ldwork);

                if (*m > *k)
                {

                    i__1 = *m - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "Transpose",
                     &i__1,
                     n,
                     k,
                     &minusone,
                     &v[v_offset],
                     ldv,
                     &work[work_offset],
                     ldwork,
                     &one,
                     &c__[c_offset],
                     ldc);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", "Transpose", "Unit", n, k, &one, &v[*m - *k + 1 + v_dim1], ldv, &work[work_offset], ldwork);

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    i__2 = *n;
                    for (i__ = 1; i__ <= i__2; ++i__)
                    {
                        c__[*m - *k + j + i__ * c_dim1] -= work[i__ + j * work_dim1];
                    }
                }
            }
            else if (*side == 'r' || *side == 'R')
            {
                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    F77_FUNC(scopy, SCOPY)
                    (m, &c__[(*n - *k + j) * c_dim1 + 1], &c__1, &work[j * work_dim1 + 1], &c__1);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", "No transpose", "Unit", m, k, &one, &v[*n - *k + 1 + v_dim1], ldv, &work[work_offset], ldwork);
                if (*n > *k)
                {
                    i__1 = *n - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "No transpose",
                     m,
                     k,
                     &i__1,
                     &one,
                     &c__[c_offset],
                     ldc,
                     &v[v_offset],
                     ldv,
                     &one,
                     &work[work_offset],
                     ldwork);
                }
                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", trans, "Non-unit", m, k, &one, &t[t_offset], ldt, &work[work_offset], ldwork);
                if (*n > *k)
                {
                    i__1 = *n - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "Transpose",
                     m,
                     &i__1,
                     k,
                     &minusone,
                     &work[work_offset],
                     ldwork,
                     &v[v_offset],
                     ldv,
                     &one,
                     &c__[c_offset],
                     ldc);
                }
                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", "Transpose", "Unit", m, k, &one, &v[*n - *k + 1 + v_dim1], ldv, &work[work_offset], ldwork);
                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    i__2 = *m;
                    for (i__ = 1; i__ <= i__2; ++i__)
                    {
                        c__[i__ + (*n - *k + j) * c_dim1] -= work[i__ + j * work_dim1];
                    }
                }
            }
        }
    }
    else if (*storev == 'r' || *storev == 'R')
    {
        if (*direct == 'F' || *direct == 'f')
        {
            if (*side == 'l' || *side == 'L')
            {
                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    F77_FUNC(scopy, SCOPY)
                    (n, &c__[j + c_dim1], ldc, &work[j * work_dim1 + 1], &c__1);
                }
                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", "Transpose", "Unit", n, k, &one, &v[v_offset], ldv, &work[work_offset], ldwork);
                if (*m > *k)
                {
                    i__1 = *m - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("Transpose",
                     "Transpose",
                     n,
                     k,
                     &i__1,
                     &one,
                     &c__[*k + 1 + c_dim1],
                     ldc,
                     &v[(*k + 1) * v_dim1 + 1],
                     ldv,
                     &one,
                     &work[work_offset],
                     ldwork);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", transt, "Non-unit", n, k, &one, &t[t_offset], ldt, &work[work_offset], ldwork);
                if (*m > *k)
                {

                    i__1 = *m - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("Transpose",
                     "Transpose",
                     &i__1,
                     n,
                     k,
                     &minusone,
                     &v[(*k + 1) * v_dim1 + 1],
                     ldv,
                     &work[work_offset],
                     ldwork,
                     &one,
                     &c__[*k + 1 + c_dim1],
                     ldc);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", "No transpose", "Unit", n, k, &one, &v[v_offset], ldv, &work[work_offset], ldwork);

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    i__2 = *n;
                    for (i__ = 1; i__ <= i__2; ++i__)
                    {
                        c__[j + i__ * c_dim1] -= work[i__ + j * work_dim1];
                    }
                }
            }
            else if (*side == 'r' || *side == 'R')
            {

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    F77_FUNC(scopy, SCOPY)
                    (m, &c__[j * c_dim1 + 1], &c__1, &work[j * work_dim1 + 1], &c__1);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", "Transpose", "Unit", m, k, &one, &v[v_offset], ldv, &work[work_offset], ldwork);
                if (*n > *k)
                {

                    i__1 = *n - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "Transpose",
                     m,
                     k,
                     &i__1,
                     &one,
                     &c__[(*k + 1) * c_dim1 + 1],
                     ldc,
                     &v[(*k + 1) * v_dim1 + 1],
                     ldv,
                     &one,
                     &work[work_offset],
                     ldwork);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", trans, "Non-unit", m, k, &one, &t[t_offset], ldt, &work[work_offset], ldwork);

                if (*n > *k)
                {

                    i__1 = *n - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "No transpose",
                     m,
                     &i__1,
                     k,
                     &minusone,
                     &work[work_offset],
                     ldwork,
                     &v[(*k + 1) * v_dim1 + 1],
                     ldv,
                     &one,
                     &c__[(*k + 1) * c_dim1 + 1],
                     ldc);
                }
                F77_FUNC(strmm, STRMM)
                ("Right", "Upper", "No transpose", "Unit", m, k, &one, &v[v_offset], ldv, &work[work_offset], ldwork);
                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    i__2 = *m;
                    for (i__ = 1; i__ <= i__2; ++i__)
                    {
                        c__[i__ + j * c_dim1] -= work[i__ + j * work_dim1];
                    }
                }
            }
        }
        else
        {

            if (*side == 'l' || *side == 'L')
            {

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    F77_FUNC(scopy, SCOPY)
                    (n, &c__[*m - *k + j + c_dim1], ldc, &work[j * work_dim1 + 1], &c__1);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", "Transpose", "Unit", n, k, &one, &v[(*m - *k + 1) * v_dim1 + 1], ldv, &work[work_offset], ldwork);
                if (*m > *k)
                {

                    i__1 = *m - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("Transpose",
                     "Transpose",
                     n,
                     k,
                     &i__1,
                     &one,
                     &c__[c_offset],
                     ldc,
                     &v[v_offset],
                     ldv,
                     &one,
                     &work[work_offset],
                     ldwork);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", transt, "Non-unit", n, k, &one, &t[t_offset], ldt, &work[work_offset], ldwork);

                if (*m > *k)
                {

                    i__1 = *m - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("Transpose",
                     "Transpose",
                     &i__1,
                     n,
                     k,
                     &minusone,
                     &v[v_offset],
                     ldv,
                     &work[work_offset],
                     ldwork,
                     &one,
                     &c__[c_offset],
                     ldc);
                }

                F77_FUNC(strmm, STRMM)
                ("Right",
                 "Lower",
                 "No transpose",
                 "Unit",
                 n,
                 k,
                 &one,
                 &v[(*m - *k + 1) * v_dim1 + 1],
                 ldv,
                 &work[work_offset],
                 ldwork);

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    i__2 = *n;
                    for (i__ = 1; i__ <= i__2; ++i__)
                    {
                        c__[*m - *k + j + i__ * c_dim1] -= work[i__ + j * work_dim1];
                    }
                }
            }
            else if (*side == 'r' || *side == 'R')
            {

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    F77_FUNC(scopy, SCOPY)
                    (m, &c__[(*n - *k + j) * c_dim1 + 1], &c__1, &work[j * work_dim1 + 1], &c__1);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", "Transpose", "Unit", m, k, &one, &v[(*n - *k + 1) * v_dim1 + 1], ldv, &work[work_offset], ldwork);
                if (*n > *k)
                {

                    i__1 = *n - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "Transpose",
                     m,
                     k,
                     &i__1,
                     &one,
                     &c__[c_offset],
                     ldc,
                     &v[v_offset],
                     ldv,
                     &one,
                     &work[work_offset],
                     ldwork);
                }

                F77_FUNC(strmm, STRMM)
                ("Right", "Lower", trans, "Non-unit", m, k, &one, &t[t_offset], ldt, &work[work_offset], ldwork);

                if (*n > *k)
                {

                    i__1 = *n - *k;
                    F77_FUNC(sgemm, SGEMM)
                    ("No transpose",
                     "No transpose",
                     m,
                     &i__1,
                     k,
                     &minusone,
                     &work[work_offset],
                     ldwork,
                     &v[v_offset],
                     ldv,
                     &one,
                     &c__[c_offset],
                     ldc);
                }

                F77_FUNC(strmm, STRMM)
                ("Right",
                 "Lower",
                 "No transpose",
                 "Unit",
                 m,
                 k,
                 &one,
                 &v[(*n - *k + 1) * v_dim1 + 1],
                 ldv,
                 &work[work_offset],
                 ldwork);

                i__1 = *k;
                for (j = 1; j <= i__1; ++j)
                {
                    i__2 = *m;
                    for (i__ = 1; i__ <= i__2; ++i__)
                    {
                        c__[i__ + (*n - *k + j) * c_dim1] -= work[i__ + j * work_dim1];
                    }
                }
            }
        }
    }

    return;
}
