[] add metering mode to CLI

1 files changed, 686 insertions, 0 deletions

diff --git a/contrib/libs/clapack/zgeevx.c b/contrib/libs/clapack/zgeevx.c
new file mode 100644
index 0000000000..3b3fbdf505
--- /dev/null
+++ b/contrib/libs/clapack/zgeevx.c
@@ -0,0 +1,686 @@
+/* zgeevx.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__1 = 1;
+static integer c__0 = 0;
+static integer c_n1 = -1;
+
+/* Subroutine */ int zgeevx_(char *balanc, char *jobvl, char *jobvr, char *
+	sense, integer *n, doublecomplex *a, integer *lda, doublecomplex *w, 
+	doublecomplex *vl, integer *ldvl, doublecomplex *vr, integer *ldvr, 
+	integer *ilo, integer *ihi, doublereal *scale, doublereal *abnrm, 
+	doublereal *rconde, doublereal *rcondv, doublecomplex *work, integer *
+	lwork, doublereal *rwork, integer *info)
+{
+    /* System generated locals */
+    integer a_dim1, a_offset, vl_dim1, vl_offset, vr_dim1, vr_offset, i__1, 
+	    i__2, i__3;
+    doublereal d__1, d__2;
+    doublecomplex z__1, z__2;
+
+    /* Builtin functions */
+    double sqrt(doublereal), d_imag(doublecomplex *);
+    void d_cnjg(doublecomplex *, doublecomplex *);
+
+    /* Local variables */
+    integer i__, k;
+    char job[1];
+    doublereal scl, dum[1], eps;
+    doublecomplex tmp;
+    char side[1];
+    doublereal anrm;
+    integer ierr, itau, iwrk, nout, icond;
+    extern logical lsame_(char *, char *);
+    extern /* Subroutine */ int zscal_(integer *, doublecomplex *, 
+	    doublecomplex *, integer *), dlabad_(doublereal *, doublereal *);
+    extern doublereal dznrm2_(integer *, doublecomplex *, integer *);
+    logical scalea;
+    extern doublereal dlamch_(char *);
+    doublereal cscale;
+    extern /* Subroutine */ int dlascl_(char *, integer *, integer *, 
+	    doublereal *, doublereal *, integer *, integer *, doublereal *, 
+	    integer *, integer *), zgebak_(char *, char *, integer *, 
+	    integer *, integer *, doublereal *, integer *, doublecomplex *, 
+	    integer *, integer *), zgebal_(char *, integer *, 
+	    doublecomplex *, integer *, integer *, integer *, doublereal *, 
+	    integer *);
+    extern integer idamax_(integer *, doublereal *, integer *);
+    extern /* Subroutine */ int xerbla_(char *, integer *);
+    extern integer ilaenv_(integer *, char *, char *, integer *, integer *, 
+	    integer *, integer *);
+    logical select[1];
+    extern /* Subroutine */ int zdscal_(integer *, doublereal *, 
+	    doublecomplex *, integer *);
+    doublereal bignum;
+    extern doublereal zlange_(char *, integer *, integer *, doublecomplex *, 
+	    integer *, doublereal *);
+    extern /* Subroutine */ int zgehrd_(integer *, integer *, integer *, 
+	    doublecomplex *, integer *, doublecomplex *, doublecomplex *, 
+	    integer *, integer *), zlascl_(char *, integer *, integer *, 
+	    doublereal *, doublereal *, integer *, integer *, doublecomplex *, 
+	     integer *, integer *), zlacpy_(char *, integer *, 
+	    integer *, doublecomplex *, integer *, doublecomplex *, integer *);
+    integer minwrk, maxwrk;
+    logical wantvl, wntsnb;
+    integer hswork;
+    logical wntsne;
+    doublereal smlnum;
+    extern /* Subroutine */ int zhseqr_(char *, char *, integer *, integer *, 
+	    integer *, doublecomplex *, integer *, doublecomplex *, 
+	    doublecomplex *, integer *, doublecomplex *, integer *, integer *);
+    logical lquery, wantvr;
+    extern /* Subroutine */ int 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 *), zunghr_(integer *, integer *, 
+	    integer *, doublecomplex *, integer *, doublecomplex *, 
+	    doublecomplex *, integer *, integer *);
+    logical wntsnn, wntsnv;
+
+
+/*  -- LAPACK driver routine (version 3.2) -- */
+/*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/*     November 2006 */
+
+/*     .. Scalar Arguments .. */
+/*     .. */
+/*     .. Array Arguments .. */
+/*     .. */
+
+/*  Purpose */
+/*  ======= */
+
+/*  ZGEEVX computes for an N-by-N complex nonsymmetric matrix A, the */
+/*  eigenvalues and, optionally, the left and/or right eigenvectors. */
+
+/*  Optionally also, it computes a balancing transformation to improve */
+/*  the conditioning of the eigenvalues and eigenvectors (ILO, IHI, */
+/*  SCALE, and ABNRM), reciprocal condition numbers for the eigenvalues */
+/*  (RCONDE), and reciprocal condition numbers for the right */
+/*  eigenvectors (RCONDV). */
+
+/*  The right eigenvector v(j) of A satisfies */
+/*                   A * v(j) = lambda(j) * v(j) */
+/*  where lambda(j) is its eigenvalue. */
+/*  The left eigenvector u(j) of A satisfies */
+/*                u(j)**H * A = lambda(j) * u(j)**H */
+/*  where u(j)**H denotes the conjugate transpose of u(j). */
+
+/*  The computed eigenvectors are normalized to have Euclidean norm */
+/*  equal to 1 and largest component real. */
+
+/*  Balancing a matrix means permuting the rows and columns to make it */
+/*  more nearly upper triangular, and applying a diagonal similarity */
+/*  transformation D * A * D**(-1), where D is a diagonal matrix, to */
+/*  make its rows and columns closer in norm and the condition numbers */
+/*  of its eigenvalues and eigenvectors smaller.  The computed */
+/*  reciprocal condition numbers correspond to the balanced matrix. */
+/*  Permuting rows and columns will not change the condition numbers */
+/*  (in exact arithmetic) but diagonal scaling will.  For further */
+/*  explanation of balancing, see section 4.10.2 of the LAPACK */
+/*  Users' Guide. */
+
+/*  Arguments */
+/*  ========= */
+
+/*  BALANC  (input) CHARACTER*1 */
+/*          Indicates how the input matrix should be diagonally scaled */
+/*          and/or permuted to improve the conditioning of its */
+/*          eigenvalues. */
+/*          = 'N': Do not diagonally scale or permute; */
+/*          = 'P': Perform permutations to make the matrix more nearly */
+/*                 upper triangular. Do not diagonally scale; */
+/*          = 'S': Diagonally scale the matrix, ie. replace A by */
+/*                 D*A*D**(-1), where D is a diagonal matrix chosen */
+/*                 to make the rows and columns of A more equal in */
+/*                 norm. Do not permute; */
+/*          = 'B': Both diagonally scale and permute A. */
+
+/*          Computed reciprocal condition numbers will be for the matrix */
+/*          after balancing and/or permuting. Permuting does not change */
+/*          condition numbers (in exact arithmetic), but balancing does. */
+
+/*  JOBVL   (input) CHARACTER*1 */
+/*          = 'N': left eigenvectors of A are not computed; */
+/*          = 'V': left eigenvectors of A are computed. */
+/*          If SENSE = 'E' or 'B', JOBVL must = 'V'. */
+
+/*  JOBVR   (input) CHARACTER*1 */
+/*          = 'N': right eigenvectors of A are not computed; */
+/*          = 'V': right eigenvectors of A are computed. */
+/*          If SENSE = 'E' or 'B', JOBVR must = 'V'. */
+
+/*  SENSE   (input) CHARACTER*1 */
+/*          Determines which reciprocal condition numbers are computed. */
+/*          = 'N': None are computed; */
+/*          = 'E': Computed for eigenvalues only; */
+/*          = 'V': Computed for right eigenvectors only; */
+/*          = 'B': Computed for eigenvalues and right eigenvectors. */
+
+/*          If SENSE = 'E' or 'B', both left and right eigenvectors */
+/*          must also be computed (JOBVL = 'V' and JOBVR = 'V'). */
+
+/*  N       (input) INTEGER */
+/*          The order of the matrix A. N >= 0. */
+
+/*  A       (input/output) COMPLEX*16 array, dimension (LDA,N) */
+/*          On entry, the N-by-N matrix A. */
+/*          On exit, A has been overwritten.  If JOBVL = 'V' or */
+/*          JOBVR = 'V', A contains the Schur form of the balanced */
+/*          version of the matrix A. */
+
+/*  LDA     (input) INTEGER */
+/*          The leading dimension of the array A.  LDA >= max(1,N). */
+
+/*  W       (output) COMPLEX*16 array, dimension (N) */
+/*          W contains the computed eigenvalues. */
+
+/*  VL      (output) COMPLEX*16 array, dimension (LDVL,N) */
+/*          If JOBVL = 'V', the left eigenvectors u(j) are stored one */
+/*          after another in the columns of VL, in the same order */
+/*          as their eigenvalues. */
+/*          If JOBVL = 'N', VL is not referenced. */
+/*          u(j) = VL(:,j), the j-th column of VL. */
+
+/*  LDVL    (input) INTEGER */
+/*          The leading dimension of the array VL.  LDVL >= 1; if */
+/*          JOBVL = 'V', LDVL >= N. */
+
+/*  VR      (output) COMPLEX*16 array, dimension (LDVR,N) */
+/*          If JOBVR = 'V', the right eigenvectors v(j) are stored one */
+/*          after another in the columns of VR, in the same order */
+/*          as their eigenvalues. */
+/*          If JOBVR = 'N', VR is not referenced. */
+/*          v(j) = VR(:,j), the j-th column of VR. */
+
+/*  LDVR    (input) INTEGER */
+/*          The leading dimension of the array VR.  LDVR >= 1; if */
+/*          JOBVR = 'V', LDVR >= N. */
+
+/*  ILO     (output) INTEGER */
+/*  IHI     (output) INTEGER */
+/*          ILO and IHI are integer values determined when A was */
+/*          balanced.  The balanced A(i,j) = 0 if I > J and */
+/*          J = 1,...,ILO-1 or I = IHI+1,...,N. */
+
+/*  SCALE   (output) DOUBLE PRECISION array, dimension (N) */
+/*          Details of the permutations and scaling factors applied */
+/*          when balancing A.  If P(j) is the index of the row and column */
+/*          interchanged with row and column j, and D(j) is the scaling */
+/*          factor applied to row and column j, then */
+/*          SCALE(J) = P(J),    for J = 1,...,ILO-1 */
+/*                   = D(J),    for J = ILO,...,IHI */
+/*                   = P(J)     for J = IHI+1,...,N. */
+/*          The order in which the interchanges are made is N to IHI+1, */
+/*          then 1 to ILO-1. */
+
+/*  ABNRM   (output) DOUBLE PRECISION */
+/*          The one-norm of the balanced matrix (the maximum */
+/*          of the sum of absolute values of elements of any column). */
+
+/*  RCONDE  (output) DOUBLE PRECISION array, dimension (N) */
+/*          RCONDE(j) is the reciprocal condition number of the j-th */
+/*          eigenvalue. */
+
+/*  RCONDV  (output) DOUBLE PRECISION array, dimension (N) */
+/*          RCONDV(j) is the reciprocal condition number of the j-th */
+/*          right eigenvector. */
+
+/*  WORK    (workspace/output) COMPLEX*16 array, dimension (MAX(1,LWORK)) */
+/*          On exit, if INFO = 0, WORK(1) returns the optimal LWORK. */
+
+/*  LWORK   (input) INTEGER */
+/*          The dimension of the array WORK.  If SENSE = 'N' or 'E', */
+/*          LWORK >= max(1,2*N), and if SENSE = 'V' or 'B', */
+/*          LWORK >= N*N+2*N. */
+/*          For good performance, LWORK must generally be larger. */
+
+/*          If LWORK = -1, then a workspace query is assumed; the routine */
+/*          only calculates the optimal size of the WORK array, returns */
+/*          this value as the first entry of the WORK array, and no error */
+/*          message related to LWORK is issued by XERBLA. */
+
+/*  RWORK   (workspace) DOUBLE PRECISION array, dimension (2*N) */
+
+/*  INFO    (output) INTEGER */
+/*          = 0:  successful exit */
+/*          < 0:  if INFO = -i, the i-th argument had an illegal value. */
+/*          > 0:  if INFO = i, the QR algorithm failed to compute all the */
+/*                eigenvalues, and no eigenvectors or condition numbers */
+/*                have been computed; elements 1:ILO-1 and i+1:N of W */
+/*                contain eigenvalues which have converged. */
+
+/*  ===================================================================== */
+
+/*     .. Parameters .. */
+/*     .. */
+/*     .. Local Scalars .. */
+/*     .. */
+/*     .. Local Arrays .. */
+/*     .. */
+/*     .. External Subroutines .. */
+/*     .. */
+/*     .. External Functions .. */
+/*     .. */
+/*     .. Intrinsic Functions .. */
+/*     .. */
+/*     .. Executable Statements .. */
+
+/*     Test the input arguments */
+
+    /* Parameter adjustments */
+    a_dim1 = *lda;
+    a_offset = 1 + a_dim1;
+    a -= a_offset;
+    --w;
+    vl_dim1 = *ldvl;
+    vl_offset = 1 + vl_dim1;
+    vl -= vl_offset;
+    vr_dim1 = *ldvr;
+    vr_offset = 1 + vr_dim1;
+    vr -= vr_offset;
+    --scale;
+    --rconde;
+    --rcondv;
+    --work;
+    --rwork;
+
+    /* Function Body */
+    *info = 0;
+    lquery = *lwork == -1;
+    wantvl = lsame_(jobvl, "V");
+    wantvr = lsame_(jobvr, "V");
+    wntsnn = lsame_(sense, "N");
+    wntsne = lsame_(sense, "E");
+    wntsnv = lsame_(sense, "V");
+    wntsnb = lsame_(sense, "B");
+    if (! (lsame_(balanc, "N") || lsame_(balanc, "S") || lsame_(balanc, "P") 
+	    || lsame_(balanc, "B"))) {
+	*info = -1;
+    } else if (! wantvl && ! lsame_(jobvl, "N")) {
+	*info = -2;
+    } else if (! wantvr && ! lsame_(jobvr, "N")) {
+	*info = -3;
+    } else if (! (wntsnn || wntsne || wntsnb || wntsnv) || (wntsne || wntsnb) 
+	    && ! (wantvl && wantvr)) {
+	*info = -4;
+    } else if (*n < 0) {
+	*info = -5;
+    } else if (*lda < max(1,*n)) {
+	*info = -7;
+    } else if (*ldvl < 1 || wantvl && *ldvl < *n) {
+	*info = -10;
+    } else if (*ldvr < 1 || wantvr && *ldvr < *n) {
+	*info = -12;
+    }
+
+/*     Compute workspace */
+/*      (Note: Comments in the code beginning "Workspace:" describe the */
+/*       minimal amount of workspace needed at that point in the code, */
+/*       as well as the preferred amount for good performance. */
+/*       CWorkspace refers to complex workspace, and RWorkspace to real */
+/*       workspace. NB refers to the optimal block size for the */
+/*       immediately following subroutine, as returned by ILAENV. */
+/*       HSWORK refers to the workspace preferred by ZHSEQR, as */
+/*       calculated below. HSWORK is computed assuming ILO=1 and IHI=N, */
+/*       the worst case.) */
+
+    if (*info == 0) {
+	if (*n == 0) {
+	    minwrk = 1;
+	    maxwrk = 1;
+	} else {
+	    maxwrk = *n + *n * ilaenv_(&c__1, "ZGEHRD", " ", n, &c__1, n, &
+		    c__0);
+
+	    if (wantvl) {
+		zhseqr_("S", "V", n, &c__1, n, &a[a_offset], lda, &w[1], &vl[
+			vl_offset], ldvl, &work[1], &c_n1, info);
+	    } else if (wantvr) {
+		zhseqr_("S", "V", n, &c__1, n, &a[a_offset], lda, &w[1], &vr[
+			vr_offset], ldvr, &work[1], &c_n1, info);
+	    } else {
+		if (wntsnn) {
+		    zhseqr_("E", "N", n, &c__1, n, &a[a_offset], lda, &w[1], &
+			    vr[vr_offset], ldvr, &work[1], &c_n1, info);
+		} else {
+		    zhseqr_("S", "N", n, &c__1, n, &a[a_offset], lda, &w[1], &
+			    vr[vr_offset], ldvr, &work[1], &c_n1, info);
+		}
+	    }
+	    hswork = (integer) work[1].r;
+
+	    if (! wantvl && ! wantvr) {
+		minwrk = *n << 1;
+		if (! (wntsnn || wntsne)) {
+/* Computing MAX */
+		    i__1 = minwrk, i__2 = *n * *n + (*n << 1);
+		    minwrk = max(i__1,i__2);
+		}
+		maxwrk = max(maxwrk,hswork);
+		if (! (wntsnn || wntsne)) {
+/* Computing MAX */
+		    i__1 = maxwrk, i__2 = *n * *n + (*n << 1);
+		    maxwrk = max(i__1,i__2);
+		}
+	    } else {
+		minwrk = *n << 1;
+		if (! (wntsnn || wntsne)) {
+/* Computing MAX */
+		    i__1 = minwrk, i__2 = *n * *n + (*n << 1);
+		    minwrk = max(i__1,i__2);
+		}
+		maxwrk = max(maxwrk,hswork);
+/* Computing MAX */
+		i__1 = maxwrk, i__2 = *n + (*n - 1) * ilaenv_(&c__1, "ZUNGHR", 
+			 " ", n, &c__1, n, &c_n1);
+		maxwrk = max(i__1,i__2);
+		if (! (wntsnn || wntsne)) {
+/* Computing MAX */
+		    i__1 = maxwrk, i__2 = *n * *n + (*n << 1);
+		    maxwrk = max(i__1,i__2);
+		}
+/* Computing MAX */
+		i__1 = maxwrk, i__2 = *n << 1;
+		maxwrk = max(i__1,i__2);
+	    }
+	    maxwrk = max(maxwrk,minwrk);
+	}
+	work[1].r = (doublereal) maxwrk, work[1].i = 0.;
+
+	if (*lwork < minwrk && ! lquery) {
+	    *info = -20;
+	}
+    }
+
+    if (*info != 0) {
+	i__1 = -(*info);
+	xerbla_("ZGEEVX", &i__1);
+	return 0;
+    } else if (lquery) {
+	return 0;
+    }
+
+/*     Quick return if possible */
+
+    if (*n == 0) {
+	return 0;
+    }
+
+/*     Get machine constants */
+
+    eps = dlamch_("P");
+    smlnum = dlamch_("S");
+    bignum = 1. / smlnum;
+    dlabad_(&smlnum, &bignum);
+    smlnum = sqrt(smlnum) / eps;
+    bignum = 1. / smlnum;
+
+/*     Scale A if max element outside range [SMLNUM,BIGNUM] */
+
+    icond = 0;
+    anrm = zlange_("M", n, n, &a[a_offset], lda, dum);
+    scalea = FALSE_;
+    if (anrm > 0. && anrm < smlnum) {
+	scalea = TRUE_;
+	cscale = smlnum;
+    } else if (anrm > bignum) {
+	scalea = TRUE_;
+	cscale = bignum;
+    }
+    if (scalea) {
+	zlascl_("G", &c__0, &c__0, &anrm, &cscale, n, n, &a[a_offset], lda, &
+		ierr);
+    }
+
+/*     Balance the matrix and compute ABNRM */
+
+    zgebal_(balanc, n, &a[a_offset], lda, ilo, ihi, &scale[1], &ierr);
+    *abnrm = zlange_("1", n, n, &a[a_offset], lda, dum);
+    if (scalea) {
+	dum[0] = *abnrm;
+	dlascl_("G", &c__0, &c__0, &cscale, &anrm, &c__1, &c__1, dum, &c__1, &
+		ierr);
+	*abnrm = dum[0];
+    }
+
+/*     Reduce to upper Hessenberg form */
+/*     (CWorkspace: need 2*N, prefer N+N*NB) */
+/*     (RWorkspace: none) */
+
+    itau = 1;
+    iwrk = itau + *n;
+    i__1 = *lwork - iwrk + 1;
+    zgehrd_(n, ilo, ihi, &a[a_offset], lda, &work[itau], &work[iwrk], &i__1, &
+	    ierr);
+
+    if (wantvl) {
+
+/*        Want left eigenvectors */
+/*        Copy Householder vectors to VL */
+
+	*(unsigned char *)side = 'L';
+	zlacpy_("L", n, n, &a[a_offset], lda, &vl[vl_offset], ldvl)
+		;
+
+/*        Generate unitary matrix in VL */
+/*        (CWorkspace: need 2*N-1, prefer N+(N-1)*NB) */
+/*        (RWorkspace: none) */
+
+	i__1 = *lwork - iwrk + 1;
+	zunghr_(n, ilo, ihi, &vl[vl_offset], ldvl, &work[itau], &work[iwrk], &
+		i__1, &ierr);
+
+/*        Perform QR iteration, accumulating Schur vectors in VL */
+/*        (CWorkspace: need 1, prefer HSWORK (see comments) ) */
+/*        (RWorkspace: none) */
+
+	iwrk = itau;
+	i__1 = *lwork - iwrk + 1;
+	zhseqr_("S", "V", n, ilo, ihi, &a[a_offset], lda, &w[1], &vl[
+		vl_offset], ldvl, &work[iwrk], &i__1, info);
+
+	if (wantvr) {
+
+/*           Want left and right eigenvectors */
+/*           Copy Schur vectors to VR */
+
+	    *(unsigned char *)side = 'B';
+	    zlacpy_("F", n, n, &vl[vl_offset], ldvl, &vr[vr_offset], ldvr);
+	}
+
+    } else if (wantvr) {
+
+/*        Want right eigenvectors */
+/*        Copy Householder vectors to VR */
+
+	*(unsigned char *)side = 'R';
+	zlacpy_("L", n, n, &a[a_offset], lda, &vr[vr_offset], ldvr)
+		;
+
+/*        Generate unitary matrix in VR */
+/*        (CWorkspace: need 2*N-1, prefer N+(N-1)*NB) */
+/*        (RWorkspace: none) */
+
+	i__1 = *lwork - iwrk + 1;
+	zunghr_(n, ilo, ihi, &vr[vr_offset], ldvr, &work[itau], &work[iwrk], &
+		i__1, &ierr);
+
+/*        Perform QR iteration, accumulating Schur vectors in VR */
+/*        (CWorkspace: need 1, prefer HSWORK (see comments) ) */
+/*        (RWorkspace: none) */
+
+	iwrk = itau;
+	i__1 = *lwork - iwrk + 1;
+	zhseqr_("S", "V", n, ilo, ihi, &a[a_offset], lda, &w[1], &vr[
+		vr_offset], ldvr, &work[iwrk], &i__1, info);
+
+    } else {
+
+/*        Compute eigenvalues only */
+/*        If condition numbers desired, compute Schur form */
+
+	if (wntsnn) {
+	    *(unsigned char *)job = 'E';
+	} else {
+	    *(unsigned char *)job = 'S';
+	}
+
+/*        (CWorkspace: need 1, prefer HSWORK (see comments) ) */
+/*        (RWorkspace: none) */
+
+	iwrk = itau;
+	i__1 = *lwork - iwrk + 1;
+	zhseqr_(job, "N", n, ilo, ihi, &a[a_offset], lda, &w[1], &vr[
+		vr_offset], ldvr, &work[iwrk], &i__1, info);
+    }
+
+/*     If INFO > 0 from ZHSEQR, then quit */
+
+    if (*info > 0) {
+	goto L50;
+    }
+
+    if (wantvl || wantvr) {
+
+/*        Compute left and/or right eigenvectors */
+/*        (CWorkspace: need 2*N) */
+/*        (RWorkspace: need N) */
+
+	ztrevc_(side, "B", select, n, &a[a_offset], lda, &vl[vl_offset], ldvl, 
+		 &vr[vr_offset], ldvr, n, &nout, &work[iwrk], &rwork[1], &
+		ierr);
+    }
+
+/*     Compute condition numbers if desired */
+/*     (CWorkspace: need N*N+2*N unless SENSE = 'E') */
+/*     (RWorkspace: need 2*N unless SENSE = 'E') */
+
+    if (! wntsnn) {
+	ztrsna_(sense, "A", select, n, &a[a_offset], lda, &vl[vl_offset], 
+		ldvl, &vr[vr_offset], ldvr, &rconde[1], &rcondv[1], n, &nout, 
+		&work[iwrk], n, &rwork[1], &icond);
+    }
+
+    if (wantvl) {
+
+/*        Undo balancing of left eigenvectors */
+
+	zgebak_(balanc, "L", n, ilo, ihi, &scale[1], n, &vl[vl_offset], ldvl, 
+		&ierr);
+
+/*        Normalize left eigenvectors and make largest component real */
+
+	i__1 = *n;
+	for (i__ = 1; i__ <= i__1; ++i__) {
+	    scl = 1. / dznrm2_(n, &vl[i__ * vl_dim1 + 1], &c__1);
+	    zdscal_(n, &scl, &vl[i__ * vl_dim1 + 1], &c__1);
+	    i__2 = *n;
+	    for (k = 1; k <= i__2; ++k) {
+		i__3 = k + i__ * vl_dim1;
+/* Computing 2nd power */
+		d__1 = vl[i__3].r;
+/* Computing 2nd power */
+		d__2 = d_imag(&vl[k + i__ * vl_dim1]);
+		rwork[k] = d__1 * d__1 + d__2 * d__2;
+/* L10: */
+	    }
+	    k = idamax_(n, &rwork[1], &c__1);
+	    d_cnjg(&z__2, &vl[k + i__ * vl_dim1]);
+	    d__1 = sqrt(rwork[k]);
+	    z__1.r = z__2.r / d__1, z__1.i = z__2.i / d__1;
+	    tmp.r = z__1.r, tmp.i = z__1.i;
+	    zscal_(n, &tmp, &vl[i__ * vl_dim1 + 1], &c__1);
+	    i__2 = k + i__ * vl_dim1;
+	    i__3 = k + i__ * vl_dim1;
+	    d__1 = vl[i__3].r;
+	    z__1.r = d__1, z__1.i = 0.;
+	    vl[i__2].r = z__1.r, vl[i__2].i = z__1.i;
+/* L20: */
+	}
+    }
+
+    if (wantvr) {
+
+/*        Undo balancing of right eigenvectors */
+
+	zgebak_(balanc, "R", n, ilo, ihi, &scale[1], n, &vr[vr_offset], ldvr, 
+		&ierr);
+
+/*        Normalize right eigenvectors and make largest component real */
+
+	i__1 = *n;
+	for (i__ = 1; i__ <= i__1; ++i__) {
+	    scl = 1. / dznrm2_(n, &vr[i__ * vr_dim1 + 1], &c__1);
+	    zdscal_(n, &scl, &vr[i__ * vr_dim1 + 1], &c__1);
+	    i__2 = *n;
+	    for (k = 1; k <= i__2; ++k) {
+		i__3 = k + i__ * vr_dim1;
+/* Computing 2nd power */
+		d__1 = vr[i__3].r;
+/* Computing 2nd power */
+		d__2 = d_imag(&vr[k + i__ * vr_dim1]);
+		rwork[k] = d__1 * d__1 + d__2 * d__2;
+/* L30: */
+	    }
+	    k = idamax_(n, &rwork[1], &c__1);
+	    d_cnjg(&z__2, &vr[k + i__ * vr_dim1]);
+	    d__1 = sqrt(rwork[k]);
+	    z__1.r = z__2.r / d__1, z__1.i = z__2.i / d__1;
+	    tmp.r = z__1.r, tmp.i = z__1.i;
+	    zscal_(n, &tmp, &vr[i__ * vr_dim1 + 1], &c__1);
+	    i__2 = k + i__ * vr_dim1;
+	    i__3 = k + i__ * vr_dim1;
+	    d__1 = vr[i__3].r;
+	    z__1.r = d__1, z__1.i = 0.;
+	    vr[i__2].r = z__1.r, vr[i__2].i = z__1.i;
+/* L40: */
+	}
+    }
+
+/*     Undo scaling if necessary */
+
+L50:
+    if (scalea) {
+	i__1 = *n - *info;
+/* Computing MAX */
+	i__3 = *n - *info;
+	i__2 = max(i__3,1);
+	zlascl_("G", &c__0, &c__0, &cscale, &anrm, &i__1, &c__1, &w[*info + 1]
+, &i__2, &ierr);
+	if (*info == 0) {
+	    if ((wntsnv || wntsnb) && icond == 0) {
+		dlascl_("G", &c__0, &c__0, &cscale, &anrm, n, &c__1, &rcondv[
+			1], n, &ierr);
+	    }
+	} else {
+	    i__1 = *ilo - 1;
+	    zlascl_("G", &c__0, &c__0, &cscale, &anrm, &i__1, &c__1, &w[1], n, 
+		     &ierr);
+	}
+    }
+
+    work[1].r = (doublereal) maxwrk, work[1].i = 0.;
+    return 0;
+
+/*     End of ZGEEVX */
+
+} /* zgeevx_ */