zget37.c

Go to the documentation of this file.

/* zget37.f -- translated by f2c (version 20061008).
   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
*/

#include "f2c.h"
#include "blaswrap.h"

/* Table of constant values */

static integer c__3 = 3;
static integer c__1 = 1;
static integer c__7 = 7;
static integer c__5 = 5;
static integer c__20 = 20;
static integer c__1200 = 1200;
static integer c__0 = 0;

/* Subroutine */ int zget37_(doublereal *rmax, integer *lmax, integer *ninfo, 
        integer *knt, integer *nin)
{
    /* System generated locals */
    integer i__1, i__2, i__3;
    doublereal d__1, d__2;

    /* Builtin functions */
    double sqrt(doublereal);
    integer s_rsle(cilist *), do_lio(integer *, integer *, char *, ftnlen), 
            e_rsle(void);
    double d_imag(doublecomplex *);

    /* Local variables */
    integer i__, j, m, n;
    doublereal s[20];
    doublecomplex t[400]        /* was [20][20] */;
    doublereal v;
    doublecomplex w[20], le[400]        /* was [20][20] */, re[400]     /* 
            was [20][20] */;
    doublereal val[3], dum[1], eps, sep[20], sin__[20], tol;
    doublecomplex tmp[400]      /* was [20][20] */;
    integer icmp;
    doublecomplex cdum[1];
    integer iscl, info, lcmp[3], kmin;
    doublereal wiin[20], vmin, vmax, tnrm;
    integer isrt;
    doublereal wrin[20], vmul, stmp[20];
    doublecomplex work[1200], wtmp[20];
    doublereal wsrt[20];
    extern /* Subroutine */ int dscal_(integer *, doublereal *, doublereal *, 
            integer *);
    doublereal vcmin, sepin[20];
    extern /* Subroutine */ int dcopy_(integer *, doublereal *, integer *, 
            doublereal *, integer *);
    doublereal tolin, rwork[40];
    extern /* Subroutine */ int zcopy_(integer *, doublecomplex *, integer *, 
            doublecomplex *, integer *), dlabad_(doublereal *, doublereal *);
    extern doublereal dlamch_(char *);
    logical select[20];
    extern doublereal zlange_(char *, integer *, integer *, doublecomplex *, 
            integer *, doublereal *);
    doublereal bignum;
    extern /* Subroutine */ int zdscal_(integer *, doublereal *, 
            doublecomplex *, integer *), zgehrd_(integer *, integer *, 
            integer *, doublecomplex *, integer *, doublecomplex *, 
            doublecomplex *, integer *, integer *), zlacpy_(char *, integer *, 
             integer *, doublecomplex *, integer *, doublecomplex *, integer *
);
    doublereal septmp[20], smlnum;
    extern /* Subroutine */ int zhseqr_(char *, char *, integer *, integer *, 
            integer *, doublecomplex *, integer *, doublecomplex *, 
            doublecomplex *, integer *, doublecomplex *, integer *, integer *), ztrevc_(char *, char *, logical *, integer *, 
            doublecomplex *, integer *, doublecomplex *, integer *, 
            doublecomplex *, integer *, integer *, integer *, doublecomplex *, 
             doublereal *, integer *), ztrsna_(char *, char *, 
             logical *, integer *, doublecomplex *, integer *, doublecomplex *
, integer *, doublecomplex *, integer *, doublereal *, doublereal 
            *, integer *, integer *, doublecomplex *, integer *, doublereal *, 
             integer *);

    /* Fortran I/O blocks */
    static cilist io___5 = { 0, 0, 0, 0, 0 };
    static cilist io___9 = { 0, 0, 0, 0, 0 };
    static cilist io___12 = { 0, 0, 0, 0, 0 };



/*  -- LAPACK test routine (version 3.1) -- */
/*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
/*     November 2006 */

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

/*  Purpose */
/*  ======= */

/*  ZGET37 tests ZTRSNA, a routine for estimating condition numbers of */
/*  eigenvalues and/or right eigenvectors of a matrix. */

/*  The test matrices are read from a file with logical unit number NIN. */

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

/*  RMAX    (output) DOUBLE PRECISION array, dimension (3) */
/*          Value of the largest test ratio. */
/*          RMAX(1) = largest ratio comparing different calls to ZTRSNA */
/*          RMAX(2) = largest error in reciprocal condition */
/*                    numbers taking their conditioning into account */
/*          RMAX(3) = largest error in reciprocal condition */
/*                    numbers not taking their conditioning into */
/*                    account (may be larger than RMAX(2)) */

/*  LMAX    (output) INTEGER array, dimension (3) */
/*          LMAX(i) is example number where largest test ratio */
/*          RMAX(i) is achieved. Also: */
/*          If ZGEHRD returns INFO nonzero on example i, LMAX(1)=i */
/*          If ZHSEQR returns INFO nonzero on example i, LMAX(2)=i */
/*          If ZTRSNA returns INFO nonzero on example i, LMAX(3)=i */

/*  NINFO   (output) INTEGER array, dimension (3) */
/*          NINFO(1) = No. of times ZGEHRD returned INFO nonzero */
/*          NINFO(2) = No. of times ZHSEQR returned INFO nonzero */
/*          NINFO(3) = No. of times ZTRSNA returned INFO nonzero */

/*  KNT     (output) INTEGER */
/*          Total number of examples tested. */

/*  NIN     (input) INTEGER */
/*          Input logical unit number */

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

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

    /* Parameter adjustments */
    --ninfo;
    --lmax;
    --rmax;

    /* Function Body */
    eps = dlamch_("P");
    smlnum = dlamch_("S") / eps;
    bignum = 1. / smlnum;
    dlabad_(&smlnum, &bignum);

/*     EPSIN = 2**(-24) = precision to which input data computed */

    eps = max(eps,5.9605e-8);
    rmax[1] = 0.;
    rmax[2] = 0.;
    rmax[3] = 0.;
    lmax[1] = 0;
    lmax[2] = 0;
    lmax[3] = 0;
    *knt = 0;
    ninfo[1] = 0;
    ninfo[2] = 0;
    ninfo[3] = 0;
    val[0] = sqrt(smlnum);
    val[1] = 1.;
    val[2] = sqrt(bignum);

/*     Read input data until N=0.  Assume input eigenvalues are sorted */
/*     lexicographically (increasing by real part if ISRT = 0, */
/*     increasing by imaginary part if ISRT = 1) */

L10:
    io___5.ciunit = *nin;
    s_rsle(&io___5);
    do_lio(&c__3, &c__1, (char *)&n, (ftnlen)sizeof(integer));
    do_lio(&c__3, &c__1, (char *)&isrt, (ftnlen)sizeof(integer));
    e_rsle();
    if (n == 0) {
        return 0;
    }
    i__1 = n;
    for (i__ = 1; i__ <= i__1; ++i__) {
        io___9.ciunit = *nin;
        s_rsle(&io___9);
        i__2 = n;
        for (j = 1; j <= i__2; ++j) {
            do_lio(&c__7, &c__1, (char *)&tmp[i__ + j * 20 - 21], (ftnlen)
                    sizeof(doublecomplex));
        }
        e_rsle();
/* L20: */
    }
    i__1 = n;
    for (i__ = 1; i__ <= i__1; ++i__) {
        io___12.ciunit = *nin;
        s_rsle(&io___12);
        do_lio(&c__5, &c__1, (char *)&wrin[i__ - 1], (ftnlen)sizeof(
                doublereal));
        do_lio(&c__5, &c__1, (char *)&wiin[i__ - 1], (ftnlen)sizeof(
                doublereal));
        do_lio(&c__5, &c__1, (char *)&sin__[i__ - 1], (ftnlen)sizeof(
                doublereal));
        do_lio(&c__5, &c__1, (char *)&sepin[i__ - 1], (ftnlen)sizeof(
                doublereal));
        e_rsle();
/* L30: */
    }
    tnrm = zlange_("M", &n, &n, tmp, &c__20, rwork);
    for (iscl = 1; iscl <= 3; ++iscl) {

/*        Scale input matrix */

        ++(*knt);
        zlacpy_("F", &n, &n, tmp, &c__20, t, &c__20);
        vmul = val[iscl - 1];
        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            zdscal_(&n, &vmul, &t[i__ * 20 - 20], &c__1);
/* L40: */
        }
        if (tnrm == 0.) {
            vmul = 1.;
        }

/*        Compute eigenvalues and eigenvectors */

        i__1 = 1200 - n;
        zgehrd_(&n, &c__1, &n, t, &c__20, work, &work[n], &i__1, &info);
        if (info != 0) {
            lmax[1] = *knt;
            ++ninfo[1];
            goto L260;
        }
        i__1 = n - 2;
        for (j = 1; j <= i__1; ++j) {
            i__2 = n;
            for (i__ = j + 2; i__ <= i__2; ++i__) {
                i__3 = i__ + j * 20 - 21;
                t[i__3].r = 0., t[i__3].i = 0.;
/* L50: */
            }
/* L60: */
        }

/*        Compute Schur form */

        zhseqr_("S", "N", &n, &c__1, &n, t, &c__20, w, cdum, &c__1, work, &
                c__1200, &info);
        if (info != 0) {
            lmax[2] = *knt;
            ++ninfo[2];
            goto L260;
        }

/*        Compute eigenvectors */

        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            select[i__ - 1] = TRUE_;
/* L70: */
        }
        ztrevc_("B", "A", select, &n, t, &c__20, le, &c__20, re, &c__20, &n, &
                m, work, rwork, &info);

/*        Compute condition numbers */

        ztrsna_("B", "A", select, &n, t, &c__20, le, &c__20, re, &c__20, s, 
                sep, &n, &m, work, &n, rwork, &info);
        if (info != 0) {
            lmax[3] = *knt;
            ++ninfo[3];
            goto L260;
        }

/*        Sort eigenvalues and condition numbers lexicographically */
/*        to compare with inputs */

        zcopy_(&n, w, &c__1, wtmp, &c__1);
        if (isrt == 0) {

/*           Sort by increasing real part */

            i__1 = n;
            for (i__ = 1; i__ <= i__1; ++i__) {
                i__2 = i__ - 1;
                wsrt[i__ - 1] = w[i__2].r;
/* L80: */
            }
        } else {

/*           Sort by increasing imaginary part */

            i__1 = n;
            for (i__ = 1; i__ <= i__1; ++i__) {
                wsrt[i__ - 1] = d_imag(&w[i__ - 1]);
/* L90: */
            }
        }
        dcopy_(&n, s, &c__1, stmp, &c__1);
        dcopy_(&n, sep, &c__1, septmp, &c__1);
        d__1 = 1. / vmul;
        dscal_(&n, &d__1, septmp, &c__1);
        i__1 = n - 1;
        for (i__ = 1; i__ <= i__1; ++i__) {
            kmin = i__;
            vmin = wsrt[i__ - 1];
            i__2 = n;
            for (j = i__ + 1; j <= i__2; ++j) {
                if (wsrt[j - 1] < vmin) {
                    kmin = j;
                    vmin = wsrt[j - 1];
                }
/* L100: */
            }
            wsrt[kmin - 1] = wsrt[i__ - 1];
            wsrt[i__ - 1] = vmin;
            i__2 = i__ - 1;
            vcmin = wtmp[i__2].r;
            i__2 = i__ - 1;
            i__3 = kmin - 1;
            wtmp[i__2].r = w[i__3].r, wtmp[i__2].i = w[i__3].i;
            i__2 = kmin - 1;
            wtmp[i__2].r = vcmin, wtmp[i__2].i = 0.;
            vmin = stmp[kmin - 1];
            stmp[kmin - 1] = stmp[i__ - 1];
            stmp[i__ - 1] = vmin;
            vmin = septmp[kmin - 1];
            septmp[kmin - 1] = septmp[i__ - 1];
            septmp[i__ - 1] = vmin;
/* L110: */
        }

/*        Compare condition numbers for eigenvalues */
/*        taking their condition numbers into account */

/* Computing MAX */
        d__1 = (doublereal) n * 2. * eps * tnrm;
        v = max(d__1,smlnum);
        if (tnrm == 0.) {
            v = 1.;
        }
        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            if (v > septmp[i__ - 1]) {
                tol = 1.;
            } else {
                tol = v / septmp[i__ - 1];
            }
            if (v > sepin[i__ - 1]) {
                tolin = 1.;
            } else {
                tolin = v / sepin[i__ - 1];
            }
/* Computing MAX */
            d__1 = tol, d__2 = smlnum / eps;
            tol = max(d__1,d__2);
/* Computing MAX */
            d__1 = tolin, d__2 = smlnum / eps;
            tolin = max(d__1,d__2);
            if (eps * (sin__[i__ - 1] - tolin) > stmp[i__ - 1] + tol) {
                vmax = 1. / eps;
            } else if (sin__[i__ - 1] - tolin > stmp[i__ - 1] + tol) {
                vmax = (sin__[i__ - 1] - tolin) / (stmp[i__ - 1] + tol);
            } else if (sin__[i__ - 1] + tolin < eps * (stmp[i__ - 1] - tol)) {
                vmax = 1. / eps;
            } else if (sin__[i__ - 1] + tolin < stmp[i__ - 1] - tol) {
                vmax = (stmp[i__ - 1] - tol) / (sin__[i__ - 1] + tolin);
            } else {
                vmax = 1.;
            }
            if (vmax > rmax[2]) {
                rmax[2] = vmax;
                if (ninfo[2] == 0) {
                    lmax[2] = *knt;
                }
            }
/* L120: */
        }

/*        Compare condition numbers for eigenvectors */
/*        taking their condition numbers into account */

        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            if (v > septmp[i__ - 1] * stmp[i__ - 1]) {
                tol = septmp[i__ - 1];
            } else {
                tol = v / stmp[i__ - 1];
            }
            if (v > sepin[i__ - 1] * sin__[i__ - 1]) {
                tolin = sepin[i__ - 1];
            } else {
                tolin = v / sin__[i__ - 1];
            }
/* Computing MAX */
            d__1 = tol, d__2 = smlnum / eps;
            tol = max(d__1,d__2);
/* Computing MAX */
            d__1 = tolin, d__2 = smlnum / eps;
            tolin = max(d__1,d__2);
            if (eps * (sepin[i__ - 1] - tolin) > septmp[i__ - 1] + tol) {
                vmax = 1. / eps;
            } else if (sepin[i__ - 1] - tolin > septmp[i__ - 1] + tol) {
                vmax = (sepin[i__ - 1] - tolin) / (septmp[i__ - 1] + tol);
            } else if (sepin[i__ - 1] + tolin < eps * (septmp[i__ - 1] - tol))
                     {
                vmax = 1. / eps;
            } else if (sepin[i__ - 1] + tolin < septmp[i__ - 1] - tol) {
                vmax = (septmp[i__ - 1] - tol) / (sepin[i__ - 1] + tolin);
            } else {
                vmax = 1.;
            }
            if (vmax > rmax[2]) {
                rmax[2] = vmax;
                if (ninfo[2] == 0) {
                    lmax[2] = *knt;
                }
            }
/* L130: */
        }

/*        Compare condition numbers for eigenvalues */
/*        without taking their condition numbers into account */

        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            if (sin__[i__ - 1] <= (doublereal) (n << 1) * eps && stmp[i__ - 1]
                     <= (doublereal) (n << 1) * eps) {
                vmax = 1.;
            } else if (eps * sin__[i__ - 1] > stmp[i__ - 1]) {
                vmax = 1. / eps;
            } else if (sin__[i__ - 1] > stmp[i__ - 1]) {
                vmax = sin__[i__ - 1] / stmp[i__ - 1];
            } else if (sin__[i__ - 1] < eps * stmp[i__ - 1]) {
                vmax = 1. / eps;
            } else if (sin__[i__ - 1] < stmp[i__ - 1]) {
                vmax = stmp[i__ - 1] / sin__[i__ - 1];
            } else {
                vmax = 1.;
            }
            if (vmax > rmax[3]) {
                rmax[3] = vmax;
                if (ninfo[3] == 0) {
                    lmax[3] = *knt;
                }
            }
/* L140: */
        }

/*        Compare condition numbers for eigenvectors */
/*        without taking their condition numbers into account */

        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            if (sepin[i__ - 1] <= v && septmp[i__ - 1] <= v) {
                vmax = 1.;
            } else if (eps * sepin[i__ - 1] > septmp[i__ - 1]) {
                vmax = 1. / eps;
            } else if (sepin[i__ - 1] > septmp[i__ - 1]) {
                vmax = sepin[i__ - 1] / septmp[i__ - 1];
            } else if (sepin[i__ - 1] < eps * septmp[i__ - 1]) {
                vmax = 1. / eps;
            } else if (sepin[i__ - 1] < septmp[i__ - 1]) {
                vmax = septmp[i__ - 1] / sepin[i__ - 1];
            } else {
                vmax = 1.;
            }
            if (vmax > rmax[3]) {
                rmax[3] = vmax;
                if (ninfo[3] == 0) {
                    lmax[3] = *knt;
                }
            }
/* L150: */
        }

/*        Compute eigenvalue condition numbers only and compare */

        vmax = 0.;
        dum[0] = -1.;
        dcopy_(&n, dum, &c__0, stmp, &c__1);
        dcopy_(&n, dum, &c__0, septmp, &c__1);
        ztrsna_("E", "A", select, &n, t, &c__20, le, &c__20, re, &c__20, stmp, 
                 septmp, &n, &m, work, &n, rwork, &info)
                ;
        if (info != 0) {
            lmax[3] = *knt;
            ++ninfo[3];
            goto L260;
        }
        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            if (stmp[i__ - 1] != s[i__ - 1]) {
                vmax = 1. / eps;
            }
            if (septmp[i__ - 1] != dum[0]) {
                vmax = 1. / eps;
            }
/* L160: */
        }

/*        Compute eigenvector condition numbers only and compare */

        dcopy_(&n, dum, &c__0, stmp, &c__1);
        dcopy_(&n, dum, &c__0, septmp, &c__1);
        ztrsna_("V", "A", select, &n, t, &c__20, le, &c__20, re, &c__20, stmp, 
                 septmp, &n, &m, work, &n, rwork, &info)
                ;
        if (info != 0) {
            lmax[3] = *knt;
            ++ninfo[3];
            goto L260;
        }
        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            if (stmp[i__ - 1] != dum[0]) {
                vmax = 1. / eps;
            }
            if (septmp[i__ - 1] != sep[i__ - 1]) {
                vmax = 1. / eps;
            }
/* L170: */
        }

/*        Compute all condition numbers using SELECT and compare */

        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            select[i__ - 1] = TRUE_;
/* L180: */
        }
        dcopy_(&n, dum, &c__0, stmp, &c__1);
        dcopy_(&n, dum, &c__0, septmp, &c__1);
        ztrsna_("B", "S", select, &n, t, &c__20, le, &c__20, re, &c__20, stmp, 
                 septmp, &n, &m, work, &n, rwork, &info)
                ;
        if (info != 0) {
            lmax[3] = *knt;
            ++ninfo[3];
            goto L260;
        }
        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            if (septmp[i__ - 1] != sep[i__ - 1]) {
                vmax = 1. / eps;
            }
            if (stmp[i__ - 1] != s[i__ - 1]) {
                vmax = 1. / eps;
            }
/* L190: */
        }

/*        Compute eigenvalue condition numbers using SELECT and compare */

        dcopy_(&n, dum, &c__0, stmp, &c__1);
        dcopy_(&n, dum, &c__0, septmp, &c__1);
        ztrsna_("E", "S", select, &n, t, &c__20, le, &c__20, re, &c__20, stmp, 
                 septmp, &n, &m, work, &n, rwork, &info)
                ;
        if (info != 0) {
            lmax[3] = *knt;
            ++ninfo[3];
            goto L260;
        }
        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            if (stmp[i__ - 1] != s[i__ - 1]) {
                vmax = 1. / eps;
            }
            if (septmp[i__ - 1] != dum[0]) {
                vmax = 1. / eps;
            }
/* L200: */
        }

/*        Compute eigenvector condition numbers using SELECT and compare */

        dcopy_(&n, dum, &c__0, stmp, &c__1);
        dcopy_(&n, dum, &c__0, septmp, &c__1);
        ztrsna_("V", "S", select, &n, t, &c__20, le, &c__20, re, &c__20, stmp, 
                 septmp, &n, &m, work, &n, rwork, &info)
                ;
        if (info != 0) {
            lmax[3] = *knt;
            ++ninfo[3];
            goto L260;
        }
        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            if (stmp[i__ - 1] != dum[0]) {
                vmax = 1. / eps;
            }
            if (septmp[i__ - 1] != sep[i__ - 1]) {
                vmax = 1. / eps;
            }
/* L210: */
        }
        if (vmax > rmax[1]) {
            rmax[1] = vmax;
            if (ninfo[1] == 0) {
                lmax[1] = *knt;
            }
        }

/*        Select second and next to last eigenvalues */

        i__1 = n;
        for (i__ = 1; i__ <= i__1; ++i__) {
            select[i__ - 1] = FALSE_;
/* L220: */
        }
        icmp = 0;
        if (n > 1) {
            icmp = 1;
            lcmp[0] = 2;
            select[1] = TRUE_;
            zcopy_(&n, &re[20], &c__1, re, &c__1);
            zcopy_(&n, &le[20], &c__1, le, &c__1);
        }
        if (n > 3) {
            icmp = 2;
            lcmp[1] = n - 1;
            select[n - 2] = TRUE_;
            zcopy_(&n, &re[(n - 1) * 20 - 20], &c__1, &re[20], &c__1);
            zcopy_(&n, &le[(n - 1) * 20 - 20], &c__1, &le[20], &c__1);
        }

/*        Compute all selected condition numbers */

        dcopy_(&icmp, dum, &c__0, stmp, &c__1);
        dcopy_(&icmp, dum, &c__0, septmp, &c__1);
        ztrsna_("B", "S", select, &n, t, &c__20, le, &c__20, re, &c__20, stmp, 
                 septmp, &n, &m, work, &n, rwork, &info)
                ;
        if (info != 0) {
            lmax[3] = *knt;
            ++ninfo[3];
            goto L260;
        }
        i__1 = icmp;
        for (i__ = 1; i__ <= i__1; ++i__) {
            j = lcmp[i__ - 1];
            if (septmp[i__ - 1] != sep[j - 1]) {
                vmax = 1. / eps;
            }
            if (stmp[i__ - 1] != s[j - 1]) {
                vmax = 1. / eps;
            }
/* L230: */
        }

/*        Compute selected eigenvalue condition numbers */

        dcopy_(&icmp, dum, &c__0, stmp, &c__1);
        dcopy_(&icmp, dum, &c__0, septmp, &c__1);
        ztrsna_("E", "S", select, &n, t, &c__20, le, &c__20, re, &c__20, stmp, 
                 septmp, &n, &m, work, &n, rwork, &info)
                ;
        if (info != 0) {
            lmax[3] = *knt;
            ++ninfo[3];
            goto L260;
        }
        i__1 = icmp;
        for (i__ = 1; i__ <= i__1; ++i__) {
            j = lcmp[i__ - 1];
            if (stmp[i__ - 1] != s[j - 1]) {
                vmax = 1. / eps;
            }
            if (septmp[i__ - 1] != dum[0]) {
                vmax = 1. / eps;
            }
/* L240: */
        }

/*        Compute selected eigenvector condition numbers */

        dcopy_(&icmp, dum, &c__0, stmp, &c__1);
        dcopy_(&icmp, dum, &c__0, septmp, &c__1);
        ztrsna_("V", "S", select, &n, t, &c__20, le, &c__20, re, &c__20, stmp, 
                 septmp, &n, &m, work, &n, rwork, &info)
                ;
        if (info != 0) {
            lmax[3] = *knt;
            ++ninfo[3];
            goto L260;
        }
        i__1 = icmp;
        for (i__ = 1; i__ <= i__1; ++i__) {
            j = lcmp[i__ - 1];
            if (stmp[i__ - 1] != dum[0]) {
                vmax = 1. / eps;
            }
            if (septmp[i__ - 1] != sep[j - 1]) {
                vmax = 1. / eps;
            }
/* L250: */
        }
        if (vmax > rmax[1]) {
            rmax[1] = vmax;
            if (ninfo[1] == 0) {
                lmax[1] = *knt;
            }
        }
L260:
        ;
    }
    goto L10;

/*     End of ZGET37 */

} /* zget37_ */