aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/clapack/dgees.c
diff options
context:
space:
mode:
authorshmel1k <shmel1k@ydb.tech>2022-09-02 12:44:59 +0300
committershmel1k <shmel1k@ydb.tech>2022-09-02 12:44:59 +0300
commit90d450f74722da7859d6f510a869f6c6908fd12f (patch)
tree538c718dedc76cdfe37ad6d01ff250dd930d9278 /contrib/libs/clapack/dgees.c
parent01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff)
downloadydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/dgees.c')
-rw-r--r--contrib/libs/clapack/dgees.c549
1 files changed, 549 insertions, 0 deletions
diff --git a/contrib/libs/clapack/dgees.c b/contrib/libs/clapack/dgees.c
new file mode 100644
index 00000000000..9de8ab0b6f1
--- /dev/null
+++ b/contrib/libs/clapack/dgees.c
@@ -0,0 +1,549 @@
+/* dgees.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 dgees_(char *jobvs, char *sort, L_fp select, integer *n,
+ doublereal *a, integer *lda, integer *sdim, doublereal *wr,
+ doublereal *wi, doublereal *vs, integer *ldvs, doublereal *work,
+ integer *lwork, logical *bwork, integer *info)
+{
+ /* System generated locals */
+ integer a_dim1, a_offset, vs_dim1, vs_offset, i__1, i__2, i__3;
+
+ /* Builtin functions */
+ double sqrt(doublereal);
+
+ /* Local variables */
+ integer i__;
+ doublereal s;
+ integer i1, i2, ip, ihi, ilo;
+ doublereal dum[1], eps, sep;
+ integer ibal;
+ doublereal anrm;
+ integer idum[1], ierr, itau, iwrk, inxt, icond, ieval;
+ extern logical lsame_(char *, char *);
+ extern /* Subroutine */ int dcopy_(integer *, doublereal *, integer *,
+ doublereal *, integer *), dswap_(integer *, doublereal *, integer
+ *, doublereal *, integer *);
+ logical cursl;
+ extern /* Subroutine */ int dlabad_(doublereal *, doublereal *), dgebak_(
+ char *, char *, integer *, integer *, integer *, doublereal *,
+ integer *, doublereal *, integer *, integer *),
+ dgebal_(char *, integer *, doublereal *, integer *, integer *,
+ integer *, doublereal *, integer *);
+ logical lst2sl, scalea;
+ extern doublereal dlamch_(char *);
+ doublereal cscale;
+ extern doublereal dlange_(char *, integer *, integer *, doublereal *,
+ integer *, doublereal *);
+ extern /* Subroutine */ int dgehrd_(integer *, integer *, integer *,
+ doublereal *, integer *, doublereal *, doublereal *, integer *,
+ integer *), dlascl_(char *, integer *, integer *, doublereal *,
+ doublereal *, integer *, integer *, doublereal *, integer *,
+ integer *), dlacpy_(char *, integer *, integer *,
+ doublereal *, integer *, doublereal *, integer *),
+ xerbla_(char *, integer *);
+ extern integer ilaenv_(integer *, char *, char *, integer *, integer *,
+ integer *, integer *);
+ doublereal bignum;
+ extern /* Subroutine */ int dorghr_(integer *, integer *, integer *,
+ doublereal *, integer *, doublereal *, doublereal *, integer *,
+ integer *), dhseqr_(char *, char *, integer *, integer *, integer
+ *, doublereal *, integer *, doublereal *, doublereal *,
+ doublereal *, integer *, doublereal *, integer *, integer *), dtrsen_(char *, char *, logical *, integer *,
+ doublereal *, integer *, doublereal *, integer *, doublereal *,
+ doublereal *, integer *, doublereal *, doublereal *, doublereal *,
+ integer *, integer *, integer *, integer *);
+ logical lastsl;
+ integer minwrk, maxwrk;
+ doublereal smlnum;
+ integer hswork;
+ logical wantst, lquery, wantvs;
+
+
+/* -- LAPACK driver routine (version 3.2) -- */
+/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/* November 2006 */
+
+/* .. Scalar Arguments .. */
+/* .. */
+/* .. Array Arguments .. */
+/* .. */
+/* .. Function Arguments .. */
+/* .. */
+
+/* Purpose */
+/* ======= */
+
+/* DGEES computes for an N-by-N real nonsymmetric matrix A, the */
+/* eigenvalues, the real Schur form T, and, optionally, the matrix of */
+/* Schur vectors Z. This gives the Schur factorization A = Z*T*(Z**T). */
+
+/* Optionally, it also orders the eigenvalues on the diagonal of the */
+/* real Schur form so that selected eigenvalues are at the top left. */
+/* The leading columns of Z then form an orthonormal basis for the */
+/* invariant subspace corresponding to the selected eigenvalues. */
+
+/* A matrix is in real Schur form if it is upper quasi-triangular with */
+/* 1-by-1 and 2-by-2 blocks. 2-by-2 blocks will be standardized in the */
+/* form */
+/* [ a b ] */
+/* [ c a ] */
+
+/* where b*c < 0. The eigenvalues of such a block are a +- sqrt(bc). */
+
+/* Arguments */
+/* ========= */
+
+/* JOBVS (input) CHARACTER*1 */
+/* = 'N': Schur vectors are not computed; */
+/* = 'V': Schur vectors are computed. */
+
+/* SORT (input) CHARACTER*1 */
+/* Specifies whether or not to order the eigenvalues on the */
+/* diagonal of the Schur form. */
+/* = 'N': Eigenvalues are not ordered; */
+/* = 'S': Eigenvalues are ordered (see SELECT). */
+
+/* SELECT (external procedure) LOGICAL FUNCTION of two DOUBLE PRECISION arguments */
+/* SELECT must be declared EXTERNAL in the calling subroutine. */
+/* If SORT = 'S', SELECT is used to select eigenvalues to sort */
+/* to the top left of the Schur form. */
+/* If SORT = 'N', SELECT is not referenced. */
+/* An eigenvalue WR(j)+sqrt(-1)*WI(j) is selected if */
+/* SELECT(WR(j),WI(j)) is true; i.e., if either one of a complex */
+/* conjugate pair of eigenvalues is selected, then both complex */
+/* eigenvalues are selected. */
+/* Note that a selected complex eigenvalue may no longer */
+/* satisfy SELECT(WR(j),WI(j)) = .TRUE. after ordering, since */
+/* ordering may change the value of complex eigenvalues */
+/* (especially if the eigenvalue is ill-conditioned); in this */
+/* case INFO is set to N+2 (see INFO below). */
+
+/* N (input) INTEGER */
+/* The order of the matrix A. N >= 0. */
+
+/* A (input/output) DOUBLE PRECISION array, dimension (LDA,N) */
+/* On entry, the N-by-N matrix A. */
+/* On exit, A has been overwritten by its real Schur form T. */
+
+/* LDA (input) INTEGER */
+/* The leading dimension of the array A. LDA >= max(1,N). */
+
+/* SDIM (output) INTEGER */
+/* If SORT = 'N', SDIM = 0. */
+/* If SORT = 'S', SDIM = number of eigenvalues (after sorting) */
+/* for which SELECT is true. (Complex conjugate */
+/* pairs for which SELECT is true for either */
+/* eigenvalue count as 2.) */
+
+/* WR (output) DOUBLE PRECISION array, dimension (N) */
+/* WI (output) DOUBLE PRECISION array, dimension (N) */
+/* WR and WI contain the real and imaginary parts, */
+/* respectively, of the computed eigenvalues in the same order */
+/* that they appear on the diagonal of the output Schur form T. */
+/* Complex conjugate pairs of eigenvalues will appear */
+/* consecutively with the eigenvalue having the positive */
+/* imaginary part first. */
+
+/* VS (output) DOUBLE PRECISION array, dimension (LDVS,N) */
+/* If JOBVS = 'V', VS contains the orthogonal matrix Z of Schur */
+/* vectors. */
+/* If JOBVS = 'N', VS is not referenced. */
+
+/* LDVS (input) INTEGER */
+/* The leading dimension of the array VS. LDVS >= 1; if */
+/* JOBVS = 'V', LDVS >= N. */
+
+/* WORK (workspace/output) DOUBLE PRECISION array, dimension (MAX(1,LWORK)) */
+/* On exit, if INFO = 0, WORK(1) contains the optimal LWORK. */
+
+/* LWORK (input) INTEGER */
+/* The dimension of the array WORK. LWORK >= max(1,3*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. */
+
+/* BWORK (workspace) LOGICAL array, dimension (N) */
+/* Not referenced if SORT = 'N'. */
+
+/* INFO (output) INTEGER */
+/* = 0: successful exit */
+/* < 0: if INFO = -i, the i-th argument had an illegal value. */
+/* > 0: if INFO = i, and i is */
+/* <= N: the QR algorithm failed to compute all the */
+/* eigenvalues; elements 1:ILO-1 and i+1:N of WR and WI */
+/* contain those eigenvalues which have converged; if */
+/* JOBVS = 'V', VS contains the matrix which reduces A */
+/* to its partially converged Schur form. */
+/* = N+1: the eigenvalues could not be reordered because some */
+/* eigenvalues were too close to separate (the problem */
+/* is very ill-conditioned); */
+/* = N+2: after reordering, roundoff changed values of some */
+/* complex eigenvalues so that leading eigenvalues in */
+/* the Schur form no longer satisfy SELECT=.TRUE. This */
+/* could also be caused by underflow due to scaling. */
+
+/* ===================================================================== */
+
+/* .. 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;
+ --wr;
+ --wi;
+ vs_dim1 = *ldvs;
+ vs_offset = 1 + vs_dim1;
+ vs -= vs_offset;
+ --work;
+ --bwork;
+
+ /* Function Body */
+ *info = 0;
+ lquery = *lwork == -1;
+ wantvs = lsame_(jobvs, "V");
+ wantst = lsame_(sort, "S");
+ if (! wantvs && ! lsame_(jobvs, "N")) {
+ *info = -1;
+ } else if (! wantst && ! lsame_(sort, "N")) {
+ *info = -2;
+ } else if (*n < 0) {
+ *info = -4;
+ } else if (*lda < max(1,*n)) {
+ *info = -6;
+ } else if (*ldvs < 1 || wantvs && *ldvs < *n) {
+ *info = -11;
+ }
+
+/* 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. */
+/* NB refers to the optimal block size for the immediately */
+/* following subroutine, as returned by ILAENV. */
+/* HSWORK refers to the workspace preferred by DHSEQR, 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 << 1) + *n * ilaenv_(&c__1, "DGEHRD", " ", n, &c__1,
+ n, &c__0);
+ minwrk = *n * 3;
+
+ dhseqr_("S", jobvs, n, &c__1, n, &a[a_offset], lda, &wr[1], &wi[1]
+, &vs[vs_offset], ldvs, &work[1], &c_n1, &ieval);
+ hswork = (integer) work[1];
+
+ if (! wantvs) {
+/* Computing MAX */
+ i__1 = maxwrk, i__2 = *n + hswork;
+ maxwrk = max(i__1,i__2);
+ } else {
+/* Computing MAX */
+ i__1 = maxwrk, i__2 = (*n << 1) + (*n - 1) * ilaenv_(&c__1,
+ "DORGHR", " ", n, &c__1, n, &c_n1);
+ maxwrk = max(i__1,i__2);
+/* Computing MAX */
+ i__1 = maxwrk, i__2 = *n + hswork;
+ maxwrk = max(i__1,i__2);
+ }
+ }
+ work[1] = (doublereal) maxwrk;
+
+ if (*lwork < minwrk && ! lquery) {
+ *info = -13;
+ }
+ }
+
+ if (*info != 0) {
+ i__1 = -(*info);
+ xerbla_("DGEES ", &i__1);
+ return 0;
+ } else if (lquery) {
+ return 0;
+ }
+
+/* Quick return if possible */
+
+ if (*n == 0) {
+ *sdim = 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] */
+
+ anrm = dlange_("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) {
+ dlascl_("G", &c__0, &c__0, &anrm, &cscale, n, n, &a[a_offset], lda, &
+ ierr);
+ }
+
+/* Permute the matrix to make it more nearly triangular */
+/* (Workspace: need N) */
+
+ ibal = 1;
+ dgebal_("P", n, &a[a_offset], lda, &ilo, &ihi, &work[ibal], &ierr);
+
+/* Reduce to upper Hessenberg form */
+/* (Workspace: need 3*N, prefer 2*N+N*NB) */
+
+ itau = *n + ibal;
+ iwrk = *n + itau;
+ i__1 = *lwork - iwrk + 1;
+ dgehrd_(n, &ilo, &ihi, &a[a_offset], lda, &work[itau], &work[iwrk], &i__1,
+ &ierr);
+
+ if (wantvs) {
+
+/* Copy Householder vectors to VS */
+
+ dlacpy_("L", n, n, &a[a_offset], lda, &vs[vs_offset], ldvs)
+ ;
+
+/* Generate orthogonal matrix in VS */
+/* (Workspace: need 3*N-1, prefer 2*N+(N-1)*NB) */
+
+ i__1 = *lwork - iwrk + 1;
+ dorghr_(n, &ilo, &ihi, &vs[vs_offset], ldvs, &work[itau], &work[iwrk],
+ &i__1, &ierr);
+ }
+
+ *sdim = 0;
+
+/* Perform QR iteration, accumulating Schur vectors in VS if desired */
+/* (Workspace: need N+1, prefer N+HSWORK (see comments) ) */
+
+ iwrk = itau;
+ i__1 = *lwork - iwrk + 1;
+ dhseqr_("S", jobvs, n, &ilo, &ihi, &a[a_offset], lda, &wr[1], &wi[1], &vs[
+ vs_offset], ldvs, &work[iwrk], &i__1, &ieval);
+ if (ieval > 0) {
+ *info = ieval;
+ }
+
+/* Sort eigenvalues if desired */
+
+ if (wantst && *info == 0) {
+ if (scalea) {
+ dlascl_("G", &c__0, &c__0, &cscale, &anrm, n, &c__1, &wr[1], n, &
+ ierr);
+ dlascl_("G", &c__0, &c__0, &cscale, &anrm, n, &c__1, &wi[1], n, &
+ ierr);
+ }
+ i__1 = *n;
+ for (i__ = 1; i__ <= i__1; ++i__) {
+ bwork[i__] = (*select)(&wr[i__], &wi[i__]);
+/* L10: */
+ }
+
+/* Reorder eigenvalues and transform Schur vectors */
+/* (Workspace: none needed) */
+
+ i__1 = *lwork - iwrk + 1;
+ dtrsen_("N", jobvs, &bwork[1], n, &a[a_offset], lda, &vs[vs_offset],
+ ldvs, &wr[1], &wi[1], sdim, &s, &sep, &work[iwrk], &i__1,
+ idum, &c__1, &icond);
+ if (icond > 0) {
+ *info = *n + icond;
+ }
+ }
+
+ if (wantvs) {
+
+/* Undo balancing */
+/* (Workspace: need N) */
+
+ dgebak_("P", "R", n, &ilo, &ihi, &work[ibal], n, &vs[vs_offset], ldvs,
+ &ierr);
+ }
+
+ if (scalea) {
+
+/* Undo scaling for the Schur form of A */
+
+ dlascl_("H", &c__0, &c__0, &cscale, &anrm, n, n, &a[a_offset], lda, &
+ ierr);
+ i__1 = *lda + 1;
+ dcopy_(n, &a[a_offset], &i__1, &wr[1], &c__1);
+ if (cscale == smlnum) {
+
+/* If scaling back towards underflow, adjust WI if an */
+/* offdiagonal element of a 2-by-2 block in the Schur form */
+/* underflows. */
+
+ if (ieval > 0) {
+ i1 = ieval + 1;
+ i2 = ihi - 1;
+ i__1 = ilo - 1;
+/* Computing MAX */
+ i__3 = ilo - 1;
+ i__2 = max(i__3,1);
+ dlascl_("G", &c__0, &c__0, &cscale, &anrm, &i__1, &c__1, &wi[
+ 1], &i__2, &ierr);
+ } else if (wantst) {
+ i1 = 1;
+ i2 = *n - 1;
+ } else {
+ i1 = ilo;
+ i2 = ihi - 1;
+ }
+ inxt = i1 - 1;
+ i__1 = i2;
+ for (i__ = i1; i__ <= i__1; ++i__) {
+ if (i__ < inxt) {
+ goto L20;
+ }
+ if (wi[i__] == 0.) {
+ inxt = i__ + 1;
+ } else {
+ if (a[i__ + 1 + i__ * a_dim1] == 0.) {
+ wi[i__] = 0.;
+ wi[i__ + 1] = 0.;
+ } else if (a[i__ + 1 + i__ * a_dim1] != 0. && a[i__ + (
+ i__ + 1) * a_dim1] == 0.) {
+ wi[i__] = 0.;
+ wi[i__ + 1] = 0.;
+ if (i__ > 1) {
+ i__2 = i__ - 1;
+ dswap_(&i__2, &a[i__ * a_dim1 + 1], &c__1, &a[(
+ i__ + 1) * a_dim1 + 1], &c__1);
+ }
+ if (*n > i__ + 1) {
+ i__2 = *n - i__ - 1;
+ dswap_(&i__2, &a[i__ + (i__ + 2) * a_dim1], lda, &
+ a[i__ + 1 + (i__ + 2) * a_dim1], lda);
+ }
+ if (wantvs) {
+ dswap_(n, &vs[i__ * vs_dim1 + 1], &c__1, &vs[(i__
+ + 1) * vs_dim1 + 1], &c__1);
+ }
+ a[i__ + (i__ + 1) * a_dim1] = a[i__ + 1 + i__ *
+ a_dim1];
+ a[i__ + 1 + i__ * a_dim1] = 0.;
+ }
+ inxt = i__ + 2;
+ }
+L20:
+ ;
+ }
+ }
+
+/* Undo scaling for the imaginary part of the eigenvalues */
+
+ i__1 = *n - ieval;
+/* Computing MAX */
+ i__3 = *n - ieval;
+ i__2 = max(i__3,1);
+ dlascl_("G", &c__0, &c__0, &cscale, &anrm, &i__1, &c__1, &wi[ieval +
+ 1], &i__2, &ierr);
+ }
+
+ if (wantst && *info == 0) {
+
+/* Check if reordering successful */
+
+ lastsl = TRUE_;
+ lst2sl = TRUE_;
+ *sdim = 0;
+ ip = 0;
+ i__1 = *n;
+ for (i__ = 1; i__ <= i__1; ++i__) {
+ cursl = (*select)(&wr[i__], &wi[i__]);
+ if (wi[i__] == 0.) {
+ if (cursl) {
+ ++(*sdim);
+ }
+ ip = 0;
+ if (cursl && ! lastsl) {
+ *info = *n + 2;
+ }
+ } else {
+ if (ip == 1) {
+
+/* Last eigenvalue of conjugate pair */
+
+ cursl = cursl || lastsl;
+ lastsl = cursl;
+ if (cursl) {
+ *sdim += 2;
+ }
+ ip = -1;
+ if (cursl && ! lst2sl) {
+ *info = *n + 2;
+ }
+ } else {
+
+/* First eigenvalue of conjugate pair */
+
+ ip = 1;
+ }
+ }
+ lst2sl = lastsl;
+ lastsl = cursl;
+/* L30: */
+ }
+ }
+
+ work[1] = (doublereal) maxwrk;
+ return 0;
+
+/* End of DGEES */
+
+} /* dgees_ */