/* fortran/zlarfb.f -- translated by f2c (version 20200916).
   You must link the resulting object file with libf2c:
        on Microsoft Windows system, link with libf2c.lib;
        on Linux or Unix systems, link with .../path/to/libf2c.a -lm
        or, if you install libf2c.a in a standard place, with -lf2c -lm
        -- in that order, at the end of the command line, as in
                cc *.o -lf2c -lm
        Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,

                http://www.netlib.org/f2c/libf2c.zip
*/

#ifdef __cplusplus
extern "C" {
#endif
#include "lmp_f2c.h"

/* Table of constant values */

static doublecomplex c_b1 = {1.,0.};
static integer c__1 = 1;

/* > \brief \b ZLARFB applies a block reflector or its conjugate-transpose to a general rectangular matrix. */

/*  =========== DOCUMENTATION =========== */

/* Online html documentation available at */
/*            http://www.netlib.org/lapack/explore-html/ */

/* > \htmlonly */
/* > Download ZLARFB + dependencies */
/* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zlarfb.
f"> */
/* > [TGZ]</a> */
/* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zlarfb.
f"> */
/* > [ZIP]</a> */
/* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zlarfb.
f"> */
/* > [TXT]</a> */
/* > \endhtmlonly */

/*  Definition: */
/*  =========== */

/*       SUBROUTINE ZLARFB( SIDE, TRANS, DIRECT, STOREV, M, N, K, V, LDV, */
/*                          T, LDT, C, LDC, WORK, LDWORK ) */

/*       .. Scalar Arguments .. */
/*       CHARACTER          DIRECT, SIDE, STOREV, TRANS */
/*       INTEGER            K, LDC, LDT, LDV, LDWORK, M, N */
/*       .. */
/*       .. Array Arguments .. */
/*       COMPLEX*16         C( LDC, * ), T( LDT, * ), V( LDV, * ), */
/*      $                   WORK( LDWORK, * ) */
/*       .. */


/* > \par Purpose: */
/*  ============= */
/* > */
/* > \verbatim */
/* > */
/* > ZLARFB applies a complex block reflector H or its transpose H**H to a */
/* > complex M-by-N matrix C, from either the left or the right. */
/* > \endverbatim */

/*  Arguments: */
/*  ========== */

/* > \param[in] SIDE */
/* > \verbatim */
/* >          SIDE is CHARACTER*1 */
/* >          = 'L': apply H or H**H from the Left */
/* >          = 'R': apply H or H**H from the Right */
/* > \endverbatim */
/* > */
/* > \param[in] TRANS */
/* > \verbatim */
/* >          TRANS is CHARACTER*1 */
/* >          = 'N': apply H (No transpose) */
/* >          = 'C': apply H**H (Conjugate transpose) */
/* > \endverbatim */
/* > */
/* > \param[in] DIRECT */
/* > \verbatim */
/* >          DIRECT is CHARACTER*1 */
/* >          Indicates how H is formed from a product of elementary */
/* >          reflectors */
/* >          = 'F': H = H(1) H(2) . . . H(k) (Forward) */
/* >          = 'B': H = H(k) . . . H(2) H(1) (Backward) */
/* > \endverbatim */
/* > */
/* > \param[in] STOREV */
/* > \verbatim */
/* >          STOREV is CHARACTER*1 */
/* >          Indicates how the vectors which define the elementary */
/* >          reflectors are stored: */
/* >          = 'C': Columnwise */
/* >          = 'R': Rowwise */
/* > \endverbatim */
/* > */
/* > \param[in] M */
/* > \verbatim */
/* >          M is INTEGER */
/* >          The number of rows of the matrix C. */
/* > \endverbatim */
/* > */
/* > \param[in] N */
/* > \verbatim */
/* >          N is INTEGER */
/* >          The number of columns of the matrix C. */
/* > \endverbatim */
/* > */
/* > \param[in] K */
/* > \verbatim */
/* >          K is INTEGER */
/* >          The order of the matrix T (= the number of elementary */
/* >          reflectors whose product defines the block reflector). */
/* >          If SIDE = 'L', M >= K >= 0; */
/* >          if SIDE = 'R', N >= K >= 0. */
/* > \endverbatim */
/* > */
/* > \param[in] V */
/* > \verbatim */
/* >          V is COMPLEX*16 array, dimension */
/* >                                (LDV,K) if STOREV = 'C' */
/* >                                (LDV,M) if STOREV = 'R' and SIDE = 'L' */
/* >                                (LDV,N) if STOREV = 'R' and SIDE = 'R' */
/* >          See Further Details. */
/* > \endverbatim */
/* > */
/* > \param[in] LDV */
/* > \verbatim */
/* >          LDV is INTEGER */
/* >          The leading dimension of the array V. */
/* >          If STOREV = 'C' and SIDE = 'L', LDV >= max(1,M); */
/* >          if STOREV = 'C' and SIDE = 'R', LDV >= max(1,N); */
/* >          if STOREV = 'R', LDV >= K. */
/* > \endverbatim */
/* > */
/* > \param[in] T */
/* > \verbatim */
/* >          T is COMPLEX*16 array, dimension (LDT,K) */
/* >          The triangular K-by-K matrix T in the representation of the */
/* >          block reflector. */
/* > \endverbatim */
/* > */
/* > \param[in] LDT */
/* > \verbatim */
/* >          LDT is INTEGER */
/* >          The leading dimension of the array T. LDT >= K. */
/* > \endverbatim */
/* > */
/* > \param[in,out] C */
/* > \verbatim */
/* >          C is COMPLEX*16 array, dimension (LDC,N) */
/* >          On entry, the M-by-N matrix C. */
/* >          On exit, C is overwritten by H*C or H**H*C or C*H or C*H**H. */
/* > \endverbatim */
/* > */
/* > \param[in] LDC */
/* > \verbatim */
/* >          LDC is INTEGER */
/* >          The leading dimension of the array C. LDC >= max(1,M). */
/* > \endverbatim */
/* > */
/* > \param[out] WORK */
/* > \verbatim */
/* >          WORK is COMPLEX*16 array, dimension (LDWORK,K) */
/* > \endverbatim */
/* > */
/* > \param[in] LDWORK */
/* > \verbatim */
/* >          LDWORK is INTEGER */
/* >          The leading dimension of the array WORK. */
/* >          If SIDE = 'L', LDWORK >= max(1,N); */
/* >          if SIDE = 'R', LDWORK >= max(1,M). */
/* > \endverbatim */

/*  Authors: */
/*  ======== */

/* > \author Univ. of Tennessee */
/* > \author Univ. of California Berkeley */
/* > \author Univ. of Colorado Denver */
/* > \author NAG Ltd. */

/* > \ingroup complex16OTHERauxiliary */

/* > \par Further Details: */
/*  ===================== */
/* > */
/* > \verbatim */
/* > */
/* >  The shape of the matrix V and the storage of the vectors which define */
/* >  the H(i) is best illustrated by the following example with n = 5 and */
/* >  k = 3. The elements equal to 1 are not stored; the corresponding */
/* >  array elements are modified but restored on exit. The rest of the */
/* >  array is not used. */
/* > */
/* >  DIRECT = 'F' and STOREV = 'C':         DIRECT = 'F' and STOREV = 'R': */
/* > */
/* >               V = (  1       )                 V = (  1 v1 v1 v1 v1 ) */
/* >                   ( v1  1    )                     (     1 v2 v2 v2 ) */
/* >                   ( v1 v2  1 )                     (        1 v3 v3 ) */
/* >                   ( v1 v2 v3 ) */
/* >                   ( v1 v2 v3 ) */
/* > */
/* >  DIRECT = 'B' and STOREV = 'C':         DIRECT = 'B' and STOREV = 'R': */
/* > */
/* >               V = ( v1 v2 v3 )                 V = ( v1 v1  1       ) */
/* >                   ( v1 v2 v3 )                     ( v2 v2 v2  1    ) */
/* >                   (  1 v2 v3 )                     ( v3 v3 v3 v3  1 ) */
/* >                   (     1 v3 ) */
/* >                   (        1 ) */
/* > \endverbatim */
/* > */
/*  ===================================================================== */
/* Subroutine */ int zlarfb_(char *side, char *trans, char *direct, char *
        storev, integer *m, integer *n, integer *k, doublecomplex *v, integer
        *ldv, doublecomplex *t, integer *ldt, doublecomplex *c__, integer *
        ldc, doublecomplex *work, integer *ldwork, ftnlen side_len, ftnlen
        trans_len, ftnlen direct_len, ftnlen storev_len)
{
    /* System generated locals */
    integer c_dim1, c_offset, t_dim1, t_offset, v_dim1, v_offset, work_dim1,
            work_offset, i__1, i__2, i__3, i__4, i__5;
    doublecomplex z__1, z__2;

    /* Builtin functions */
    void d_cnjg(doublecomplex *, doublecomplex *);

    /* Local variables */
    integer i__, j;
    extern logical lsame_(char *, char *, ftnlen, ftnlen);
    extern /* Subroutine */ int zgemm_(char *, char *, integer *, integer *,
            integer *, doublecomplex *, doublecomplex *, integer *,
            doublecomplex *, integer *, doublecomplex *, doublecomplex *,
            integer *, ftnlen, ftnlen), zcopy_(integer *, doublecomplex *,
            integer *, doublecomplex *, integer *), ztrmm_(char *, char *,
            char *, char *, integer *, integer *, doublecomplex *,
            doublecomplex *, integer *, doublecomplex *, integer *, ftnlen,
            ftnlen, ftnlen, ftnlen), zlacgv_(integer *, doublecomplex *,
            integer *);
    char transt[1];


/*  -- LAPACK auxiliary routine -- */
/*  -- LAPACK is a software package provided by Univ. of Tennessee,    -- */
/*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- */

/*     .. Scalar Arguments .. */
/*     .. */
/*     .. Array Arguments .. */
/*     .. */

/*  ===================================================================== */

/*     .. Parameters .. */
/*     .. */
/*     .. Local Scalars .. */
/*     .. */
/*     .. External Functions .. */
/*     .. */
/*     .. External Subroutines .. */
/*     .. */
/*     .. Intrinsic Functions .. */
/*     .. */
/*     .. Executable Statements .. */

/*     Quick return if possible */

    /* Parameter adjustments */
    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;

    /* Function Body */
    if (*m <= 0 || *n <= 0) {
        return 0;
    }

    if (lsame_(trans, (char *)"N", (ftnlen)1, (ftnlen)1)) {
        *(unsigned char *)transt = 'C';
    } else {
        *(unsigned char *)transt = 'N';
    }

    if (lsame_(storev, (char *)"C", (ftnlen)1, (ftnlen)1)) {

        if (lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1)) {

/*           Let  V =  ( V1 )    (first K rows) */
/*                     ( V2 ) */
/*           where  V1  is unit lower triangular. */

            if (lsame_(side, (char *)"L", (ftnlen)1, (ftnlen)1)) {

/*              Form  H * C  or  H**H * C  where  C = ( C1 ) */
/*                                                    ( C2 ) */

/*              W := C**H * V  =  (C1**H * V1 + C2**H * V2)  (stored in WORK) */

/*              W := C1**H */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    zcopy_(n, &c__[j + c_dim1], ldc, &work[j * work_dim1 + 1],
                             &c__1);
                    zlacgv_(n, &work[j * work_dim1 + 1], &c__1);
/* L10: */
                }

/*              W := W * V1 */

                ztrmm_((char *)"Right", (char *)"Lower", (char *)"No transpose", (char *)"Unit", n, k, &c_b1,
                        &v[v_offset], ldv, &work[work_offset], ldwork, (
                        ftnlen)5, (ftnlen)5, (ftnlen)12, (ftnlen)4);
                if (*m > *k) {

/*                 W := W + C2**H * V2 */

                    i__1 = *m - *k;
                    zgemm_((char *)"Conjugate transpose", (char *)"No transpose", n, k, &i__1,
                             &c_b1, &c__[*k + 1 + c_dim1], ldc, &v[*k + 1 +
                            v_dim1], ldv, &c_b1, &work[work_offset], ldwork, (
                            ftnlen)19, (ftnlen)12);
                }

/*              W := W * T**H  or  W * T */

                ztrmm_((char *)"Right", (char *)"Upper", transt, (char *)"Non-unit", n, k, &c_b1, &t[
                        t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
                         (ftnlen)5, (ftnlen)1, (ftnlen)8);

/*              C := C - V * W**H */

                if (*m > *k) {

/*                 C2 := C2 - V2 * W**H */

                    i__1 = *m - *k;
                    z__1.r = -1., z__1.i = -0.;
                    zgemm_((char *)"No transpose", (char *)"Conjugate transpose", &i__1, n, k,
                             &z__1, &v[*k + 1 + v_dim1], ldv, &work[
                            work_offset], ldwork, &c_b1, &c__[*k + 1 + c_dim1]
                            , ldc, (ftnlen)12, (ftnlen)19);
                }

/*              W := W * V1**H */

                ztrmm_((char *)"Right", (char *)"Lower", (char *)"Conjugate transpose", (char *)"Unit", n, k,
                        &c_b1, &v[v_offset], ldv, &work[work_offset], ldwork,
                        (ftnlen)5, (ftnlen)5, (ftnlen)19, (ftnlen)4);

/*              C1 := C1 - W**H */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    i__2 = *n;
                    for (i__ = 1; i__ <= i__2; ++i__) {
                        i__3 = j + i__ * c_dim1;
                        i__4 = j + i__ * c_dim1;
                        d_cnjg(&z__2, &work[i__ + j * work_dim1]);
                        z__1.r = c__[i__4].r - z__2.r, z__1.i = c__[i__4].i -
                                z__2.i;
                        c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/* L20: */
                    }
/* L30: */
                }

            } else if (lsame_(side, (char *)"R", (ftnlen)1, (ftnlen)1)) {

/*              Form  C * H  or  C * H**H  where  C = ( C1  C2 ) */

/*              W := C * V  =  (C1*V1 + C2*V2)  (stored in WORK) */

/*              W := C1 */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    zcopy_(m, &c__[j * c_dim1 + 1], &c__1, &work[j *
                            work_dim1 + 1], &c__1);
/* L40: */
                }

/*              W := W * V1 */

                ztrmm_((char *)"Right", (char *)"Lower", (char *)"No transpose", (char *)"Unit", m, k, &c_b1,
                        &v[v_offset], ldv, &work[work_offset], ldwork, (
                        ftnlen)5, (ftnlen)5, (ftnlen)12, (ftnlen)4);
                if (*n > *k) {

/*                 W := W + C2 * V2 */

                    i__1 = *n - *k;
                    zgemm_((char *)"No transpose", (char *)"No transpose", m, k, &i__1, &c_b1,
                             &c__[(*k + 1) * c_dim1 + 1], ldc, &v[*k + 1 +
                            v_dim1], ldv, &c_b1, &work[work_offset], ldwork, (
                            ftnlen)12, (ftnlen)12);
                }

/*              W := W * T  or  W * T**H */

                ztrmm_((char *)"Right", (char *)"Upper", trans, (char *)"Non-unit", m, k, &c_b1, &t[
                        t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
                         (ftnlen)5, (ftnlen)1, (ftnlen)8);

/*              C := C - W * V**H */

                if (*n > *k) {

/*                 C2 := C2 - W * V2**H */

                    i__1 = *n - *k;
                    z__1.r = -1., z__1.i = -0.;
                    zgemm_((char *)"No transpose", (char *)"Conjugate transpose", m, &i__1, k,
                             &z__1, &work[work_offset], ldwork, &v[*k + 1 +
                            v_dim1], ldv, &c_b1, &c__[(*k + 1) * c_dim1 + 1],
                            ldc, (ftnlen)12, (ftnlen)19);
                }

/*              W := W * V1**H */

                ztrmm_((char *)"Right", (char *)"Lower", (char *)"Conjugate transpose", (char *)"Unit", m, k,
                        &c_b1, &v[v_offset], ldv, &work[work_offset], ldwork,
                        (ftnlen)5, (ftnlen)5, (ftnlen)19, (ftnlen)4);

/*              C1 := C1 - W */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    i__2 = *m;
                    for (i__ = 1; i__ <= i__2; ++i__) {
                        i__3 = i__ + j * c_dim1;
                        i__4 = i__ + j * c_dim1;
                        i__5 = i__ + j * work_dim1;
                        z__1.r = c__[i__4].r - work[i__5].r, z__1.i = c__[
                                i__4].i - work[i__5].i;
                        c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/* L50: */
                    }
/* L60: */
                }
            }

        } else {

/*           Let  V =  ( V1 ) */
/*                     ( V2 )    (last K rows) */
/*           where  V2  is unit upper triangular. */

            if (lsame_(side, (char *)"L", (ftnlen)1, (ftnlen)1)) {

/*              Form  H * C  or  H**H * C  where  C = ( C1 ) */
/*                                                    ( C2 ) */

/*              W := C**H * V  =  (C1**H * V1 + C2**H * V2)  (stored in WORK) */

/*              W := C2**H */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    zcopy_(n, &c__[*m - *k + j + c_dim1], ldc, &work[j *
                            work_dim1 + 1], &c__1);
                    zlacgv_(n, &work[j * work_dim1 + 1], &c__1);
/* L70: */
                }

/*              W := W * V2 */

                ztrmm_((char *)"Right", (char *)"Upper", (char *)"No transpose", (char *)"Unit", n, k, &c_b1,
                        &v[*m - *k + 1 + v_dim1], ldv, &work[work_offset],
                        ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)12, (ftnlen)4);
                if (*m > *k) {

/*                 W := W + C1**H * V1 */

                    i__1 = *m - *k;
                    zgemm_((char *)"Conjugate transpose", (char *)"No transpose", n, k, &i__1,
                             &c_b1, &c__[c_offset], ldc, &v[v_offset], ldv, &
                            c_b1, &work[work_offset], ldwork, (ftnlen)19, (
                            ftnlen)12);
                }

/*              W := W * T**H  or  W * T */

                ztrmm_((char *)"Right", (char *)"Lower", transt, (char *)"Non-unit", n, k, &c_b1, &t[
                        t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
                         (ftnlen)5, (ftnlen)1, (ftnlen)8);

/*              C := C - V * W**H */

                if (*m > *k) {

/*                 C1 := C1 - V1 * W**H */

                    i__1 = *m - *k;
                    z__1.r = -1., z__1.i = -0.;
                    zgemm_((char *)"No transpose", (char *)"Conjugate transpose", &i__1, n, k,
                             &z__1, &v[v_offset], ldv, &work[work_offset],
                            ldwork, &c_b1, &c__[c_offset], ldc, (ftnlen)12, (
                            ftnlen)19);
                }

/*              W := W * V2**H */

                ztrmm_((char *)"Right", (char *)"Upper", (char *)"Conjugate transpose", (char *)"Unit", n, k,
                        &c_b1, &v[*m - *k + 1 + v_dim1], ldv, &work[
                        work_offset], ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)
                        19, (ftnlen)4);

/*              C2 := C2 - W**H */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    i__2 = *n;
                    for (i__ = 1; i__ <= i__2; ++i__) {
                        i__3 = *m - *k + j + i__ * c_dim1;
                        i__4 = *m - *k + j + i__ * c_dim1;
                        d_cnjg(&z__2, &work[i__ + j * work_dim1]);
                        z__1.r = c__[i__4].r - z__2.r, z__1.i = c__[i__4].i -
                                z__2.i;
                        c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/* L80: */
                    }
/* L90: */
                }

            } else if (lsame_(side, (char *)"R", (ftnlen)1, (ftnlen)1)) {

/*              Form  C * H  or  C * H**H  where  C = ( C1  C2 ) */

/*              W := C * V  =  (C1*V1 + C2*V2)  (stored in WORK) */

/*              W := C2 */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    zcopy_(m, &c__[(*n - *k + j) * c_dim1 + 1], &c__1, &work[
                            j * work_dim1 + 1], &c__1);
/* L100: */
                }

/*              W := W * V2 */

                ztrmm_((char *)"Right", (char *)"Upper", (char *)"No transpose", (char *)"Unit", m, k, &c_b1,
                        &v[*n - *k + 1 + v_dim1], ldv, &work[work_offset],
                        ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)12, (ftnlen)4);
                if (*n > *k) {

/*                 W := W + C1 * V1 */

                    i__1 = *n - *k;
                    zgemm_((char *)"No transpose", (char *)"No transpose", m, k, &i__1, &c_b1,
                             &c__[c_offset], ldc, &v[v_offset], ldv, &c_b1, &
                            work[work_offset], ldwork, (ftnlen)12, (ftnlen)12)
                            ;
                }

/*              W := W * T  or  W * T**H */

                ztrmm_((char *)"Right", (char *)"Lower", trans, (char *)"Non-unit", m, k, &c_b1, &t[
                        t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
                         (ftnlen)5, (ftnlen)1, (ftnlen)8);

/*              C := C - W * V**H */

                if (*n > *k) {

/*                 C1 := C1 - W * V1**H */

                    i__1 = *n - *k;
                    z__1.r = -1., z__1.i = -0.;
                    zgemm_((char *)"No transpose", (char *)"Conjugate transpose", m, &i__1, k,
                             &z__1, &work[work_offset], ldwork, &v[v_offset],
                            ldv, &c_b1, &c__[c_offset], ldc, (ftnlen)12, (
                            ftnlen)19);
                }

/*              W := W * V2**H */

                ztrmm_((char *)"Right", (char *)"Upper", (char *)"Conjugate transpose", (char *)"Unit", m, k,
                        &c_b1, &v[*n - *k + 1 + v_dim1], ldv, &work[
                        work_offset], ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)
                        19, (ftnlen)4);

/*              C2 := C2 - W */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    i__2 = *m;
                    for (i__ = 1; i__ <= i__2; ++i__) {
                        i__3 = i__ + (*n - *k + j) * c_dim1;
                        i__4 = i__ + (*n - *k + j) * c_dim1;
                        i__5 = i__ + j * work_dim1;
                        z__1.r = c__[i__4].r - work[i__5].r, z__1.i = c__[
                                i__4].i - work[i__5].i;
                        c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/* L110: */
                    }
/* L120: */
                }
            }
        }

    } else if (lsame_(storev, (char *)"R", (ftnlen)1, (ftnlen)1)) {

        if (lsame_(direct, (char *)"F", (ftnlen)1, (ftnlen)1)) {

/*           Let  V =  ( V1  V2 )    (V1: first K columns) */
/*           where  V1  is unit upper triangular. */

            if (lsame_(side, (char *)"L", (ftnlen)1, (ftnlen)1)) {

/*              Form  H * C  or  H**H * C  where  C = ( C1 ) */
/*                                                    ( C2 ) */

/*              W := C**H * V**H  =  (C1**H * V1**H + C2**H * V2**H) (stored in WORK) */

/*              W := C1**H */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    zcopy_(n, &c__[j + c_dim1], ldc, &work[j * work_dim1 + 1],
                             &c__1);
                    zlacgv_(n, &work[j * work_dim1 + 1], &c__1);
/* L130: */
                }

/*              W := W * V1**H */

                ztrmm_((char *)"Right", (char *)"Upper", (char *)"Conjugate transpose", (char *)"Unit", n, k,
                        &c_b1, &v[v_offset], ldv, &work[work_offset], ldwork,
                        (ftnlen)5, (ftnlen)5, (ftnlen)19, (ftnlen)4);
                if (*m > *k) {

/*                 W := W + C2**H * V2**H */

                    i__1 = *m - *k;
                    zgemm_((char *)"Conjugate transpose", (char *)"Conjugate transpose", n, k,
                             &i__1, &c_b1, &c__[*k + 1 + c_dim1], ldc, &v[(*k
                            + 1) * v_dim1 + 1], ldv, &c_b1, &work[work_offset]
                            , ldwork, (ftnlen)19, (ftnlen)19);
                }

/*              W := W * T**H  or  W * T */

                ztrmm_((char *)"Right", (char *)"Upper", transt, (char *)"Non-unit", n, k, &c_b1, &t[
                        t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
                         (ftnlen)5, (ftnlen)1, (ftnlen)8);

/*              C := C - V**H * W**H */

                if (*m > *k) {

/*                 C2 := C2 - V2**H * W**H */

                    i__1 = *m - *k;
                    z__1.r = -1., z__1.i = -0.;
                    zgemm_((char *)"Conjugate transpose", (char *)"Conjugate transpose", &
                            i__1, n, k, &z__1, &v[(*k + 1) * v_dim1 + 1], ldv,
                             &work[work_offset], ldwork, &c_b1, &c__[*k + 1 +
                            c_dim1], ldc, (ftnlen)19, (ftnlen)19);
                }

/*              W := W * V1 */

                ztrmm_((char *)"Right", (char *)"Upper", (char *)"No transpose", (char *)"Unit", n, k, &c_b1,
                        &v[v_offset], ldv, &work[work_offset], ldwork, (
                        ftnlen)5, (ftnlen)5, (ftnlen)12, (ftnlen)4);

/*              C1 := C1 - W**H */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    i__2 = *n;
                    for (i__ = 1; i__ <= i__2; ++i__) {
                        i__3 = j + i__ * c_dim1;
                        i__4 = j + i__ * c_dim1;
                        d_cnjg(&z__2, &work[i__ + j * work_dim1]);
                        z__1.r = c__[i__4].r - z__2.r, z__1.i = c__[i__4].i -
                                z__2.i;
                        c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/* L140: */
                    }
/* L150: */
                }

            } else if (lsame_(side, (char *)"R", (ftnlen)1, (ftnlen)1)) {

/*              Form  C * H  or  C * H**H  where  C = ( C1  C2 ) */

/*              W := C * V**H  =  (C1*V1**H + C2*V2**H)  (stored in WORK) */

/*              W := C1 */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    zcopy_(m, &c__[j * c_dim1 + 1], &c__1, &work[j *
                            work_dim1 + 1], &c__1);
/* L160: */
                }

/*              W := W * V1**H */

                ztrmm_((char *)"Right", (char *)"Upper", (char *)"Conjugate transpose", (char *)"Unit", m, k,
                        &c_b1, &v[v_offset], ldv, &work[work_offset], ldwork,
                        (ftnlen)5, (ftnlen)5, (ftnlen)19, (ftnlen)4);
                if (*n > *k) {

/*                 W := W + C2 * V2**H */

                    i__1 = *n - *k;
                    zgemm_((char *)"No transpose", (char *)"Conjugate transpose", m, k, &i__1,
                             &c_b1, &c__[(*k + 1) * c_dim1 + 1], ldc, &v[(*k
                            + 1) * v_dim1 + 1], ldv, &c_b1, &work[work_offset]
                            , ldwork, (ftnlen)12, (ftnlen)19);
                }

/*              W := W * T  or  W * T**H */

                ztrmm_((char *)"Right", (char *)"Upper", trans, (char *)"Non-unit", m, k, &c_b1, &t[
                        t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
                         (ftnlen)5, (ftnlen)1, (ftnlen)8);

/*              C := C - W * V */

                if (*n > *k) {

/*                 C2 := C2 - W * V2 */

                    i__1 = *n - *k;
                    z__1.r = -1., z__1.i = -0.;
                    zgemm_((char *)"No transpose", (char *)"No transpose", m, &i__1, k, &z__1,
                             &work[work_offset], ldwork, &v[(*k + 1) * v_dim1
                            + 1], ldv, &c_b1, &c__[(*k + 1) * c_dim1 + 1],
                            ldc, (ftnlen)12, (ftnlen)12);
                }

/*              W := W * V1 */

                ztrmm_((char *)"Right", (char *)"Upper", (char *)"No transpose", (char *)"Unit", m, k, &c_b1,
                        &v[v_offset], ldv, &work[work_offset], ldwork, (
                        ftnlen)5, (ftnlen)5, (ftnlen)12, (ftnlen)4);

/*              C1 := C1 - W */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    i__2 = *m;
                    for (i__ = 1; i__ <= i__2; ++i__) {
                        i__3 = i__ + j * c_dim1;
                        i__4 = i__ + j * c_dim1;
                        i__5 = i__ + j * work_dim1;
                        z__1.r = c__[i__4].r - work[i__5].r, z__1.i = c__[
                                i__4].i - work[i__5].i;
                        c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/* L170: */
                    }
/* L180: */
                }

            }

        } else {

/*           Let  V =  ( V1  V2 )    (V2: last K columns) */
/*           where  V2  is unit lower triangular. */

            if (lsame_(side, (char *)"L", (ftnlen)1, (ftnlen)1)) {

/*              Form  H * C  or  H**H * C  where  C = ( C1 ) */
/*                                                    ( C2 ) */

/*              W := C**H * V**H  =  (C1**H * V1**H + C2**H * V2**H) (stored in WORK) */

/*              W := C2**H */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    zcopy_(n, &c__[*m - *k + j + c_dim1], ldc, &work[j *
                            work_dim1 + 1], &c__1);
                    zlacgv_(n, &work[j * work_dim1 + 1], &c__1);
/* L190: */
                }

/*              W := W * V2**H */

                ztrmm_((char *)"Right", (char *)"Lower", (char *)"Conjugate transpose", (char *)"Unit", n, k,
                        &c_b1, &v[(*m - *k + 1) * v_dim1 + 1], ldv, &work[
                        work_offset], ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)
                        19, (ftnlen)4);
                if (*m > *k) {

/*                 W := W + C1**H * V1**H */

                    i__1 = *m - *k;
                    zgemm_((char *)"Conjugate transpose", (char *)"Conjugate transpose", n, k,
                             &i__1, &c_b1, &c__[c_offset], ldc, &v[v_offset],
                            ldv, &c_b1, &work[work_offset], ldwork, (ftnlen)
                            19, (ftnlen)19);
                }

/*              W := W * T**H  or  W * T */

                ztrmm_((char *)"Right", (char *)"Lower", transt, (char *)"Non-unit", n, k, &c_b1, &t[
                        t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
                         (ftnlen)5, (ftnlen)1, (ftnlen)8);

/*              C := C - V**H * W**H */

                if (*m > *k) {

/*                 C1 := C1 - V1**H * W**H */

                    i__1 = *m - *k;
                    z__1.r = -1., z__1.i = -0.;
                    zgemm_((char *)"Conjugate transpose", (char *)"Conjugate transpose", &
                            i__1, n, k, &z__1, &v[v_offset], ldv, &work[
                            work_offset], ldwork, &c_b1, &c__[c_offset], ldc,
                            (ftnlen)19, (ftnlen)19);
                }

/*              W := W * V2 */

                ztrmm_((char *)"Right", (char *)"Lower", (char *)"No transpose", (char *)"Unit", n, k, &c_b1,
                        &v[(*m - *k + 1) * v_dim1 + 1], ldv, &work[
                        work_offset], ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)
                        12, (ftnlen)4);

/*              C2 := C2 - W**H */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    i__2 = *n;
                    for (i__ = 1; i__ <= i__2; ++i__) {
                        i__3 = *m - *k + j + i__ * c_dim1;
                        i__4 = *m - *k + j + i__ * c_dim1;
                        d_cnjg(&z__2, &work[i__ + j * work_dim1]);
                        z__1.r = c__[i__4].r - z__2.r, z__1.i = c__[i__4].i -
                                z__2.i;
                        c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/* L200: */
                    }
/* L210: */
                }

            } else if (lsame_(side, (char *)"R", (ftnlen)1, (ftnlen)1)) {

/*              Form  C * H  or  C * H**H  where  C = ( C1  C2 ) */

/*              W := C * V**H  =  (C1*V1**H + C2*V2**H)  (stored in WORK) */

/*              W := C2 */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    zcopy_(m, &c__[(*n - *k + j) * c_dim1 + 1], &c__1, &work[
                            j * work_dim1 + 1], &c__1);
/* L220: */
                }

/*              W := W * V2**H */

                ztrmm_((char *)"Right", (char *)"Lower", (char *)"Conjugate transpose", (char *)"Unit", m, k,
                        &c_b1, &v[(*n - *k + 1) * v_dim1 + 1], ldv, &work[
                        work_offset], ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)
                        19, (ftnlen)4);
                if (*n > *k) {

/*                 W := W + C1 * V1**H */

                    i__1 = *n - *k;
                    zgemm_((char *)"No transpose", (char *)"Conjugate transpose", m, k, &i__1,
                             &c_b1, &c__[c_offset], ldc, &v[v_offset], ldv, &
                            c_b1, &work[work_offset], ldwork, (ftnlen)12, (
                            ftnlen)19);
                }

/*              W := W * T  or  W * T**H */

                ztrmm_((char *)"Right", (char *)"Lower", trans, (char *)"Non-unit", m, k, &c_b1, &t[
                        t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
                         (ftnlen)5, (ftnlen)1, (ftnlen)8);

/*              C := C - W * V */

                if (*n > *k) {

/*                 C1 := C1 - W * V1 */

                    i__1 = *n - *k;
                    z__1.r = -1., z__1.i = -0.;
                    zgemm_((char *)"No transpose", (char *)"No transpose", m, &i__1, k, &z__1,
                             &work[work_offset], ldwork, &v[v_offset], ldv, &
                            c_b1, &c__[c_offset], ldc, (ftnlen)12, (ftnlen)12)
                            ;
                }

/*              W := W * V2 */

                ztrmm_((char *)"Right", (char *)"Lower", (char *)"No transpose", (char *)"Unit", m, k, &c_b1,
                        &v[(*n - *k + 1) * v_dim1 + 1], ldv, &work[
                        work_offset], ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)
                        12, (ftnlen)4);

/*              C1 := C1 - W */

                i__1 = *k;
                for (j = 1; j <= i__1; ++j) {
                    i__2 = *m;
                    for (i__ = 1; i__ <= i__2; ++i__) {
                        i__3 = i__ + (*n - *k + j) * c_dim1;
                        i__4 = i__ + (*n - *k + j) * c_dim1;
                        i__5 = i__ + j * work_dim1;
                        z__1.r = c__[i__4].r - work[i__5].r, z__1.i = c__[
                                i__4].i - work[i__5].i;
                        c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/* L230: */
                    }
/* L240: */
                }

            }

        }
    }

    return 0;

/*     End of ZLARFB */

} /* zlarfb_ */

#ifdef __cplusplus
        }
#endif