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author | shmel1k <shmel1k@ydb.tech> | 2022-09-02 12:44:59 +0300 |
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committer | shmel1k <shmel1k@ydb.tech> | 2022-09-02 12:44:59 +0300 |
commit | 90d450f74722da7859d6f510a869f6c6908fd12f (patch) | |
tree | 538c718dedc76cdfe37ad6d01ff250dd930d9278 /contrib/libs/clapack/cggev.c | |
parent | 01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff) | |
download | ydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz |
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/cggev.c')
-rw-r--r-- | contrib/libs/clapack/cggev.c | 592 |
1 files changed, 592 insertions, 0 deletions
diff --git a/contrib/libs/clapack/cggev.c b/contrib/libs/clapack/cggev.c new file mode 100644 index 0000000000..615ac575ee --- /dev/null +++ b/contrib/libs/clapack/cggev.c @@ -0,0 +1,592 @@ +/* cggev.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 complex c_b1 = {0.f,0.f}; +static complex c_b2 = {1.f,0.f}; +static integer c__1 = 1; +static integer c__0 = 0; +static integer c_n1 = -1; + +/* Subroutine */ int cggev_(char *jobvl, char *jobvr, integer *n, complex *a, + integer *lda, complex *b, integer *ldb, complex *alpha, complex *beta, + complex *vl, integer *ldvl, complex *vr, integer *ldvr, complex * + work, integer *lwork, real *rwork, integer *info) +{ + /* System generated locals */ + integer a_dim1, a_offset, b_dim1, b_offset, vl_dim1, vl_offset, vr_dim1, + vr_offset, i__1, i__2, i__3, i__4; + real r__1, r__2, r__3, r__4; + complex q__1; + + /* Builtin functions */ + double sqrt(doublereal), r_imag(complex *); + + /* Local variables */ + integer jc, in, jr, ihi, ilo; + real eps; + logical ilv; + real anrm, bnrm; + integer ierr, itau; + real temp; + logical ilvl, ilvr; + integer iwrk; + extern logical lsame_(char *, char *); + integer ileft, icols, irwrk, irows; + extern /* Subroutine */ int cggbak_(char *, char *, integer *, integer *, + integer *, real *, real *, integer *, complex *, integer *, + integer *), cggbal_(char *, integer *, complex *, + integer *, complex *, integer *, integer *, integer *, real *, + real *, real *, integer *), slabad_(real *, real *); + extern doublereal clange_(char *, integer *, integer *, complex *, + integer *, real *); + extern /* Subroutine */ int cgghrd_(char *, char *, integer *, integer *, + integer *, complex *, integer *, complex *, integer *, complex *, + integer *, complex *, integer *, integer *), + clascl_(char *, integer *, integer *, real *, real *, integer *, + integer *, complex *, integer *, integer *); + logical ilascl, ilbscl; + extern /* Subroutine */ int cgeqrf_(integer *, integer *, complex *, + integer *, complex *, complex *, integer *, integer *); + extern doublereal slamch_(char *); + extern /* Subroutine */ int clacpy_(char *, integer *, integer *, complex + *, integer *, complex *, integer *), claset_(char *, + integer *, integer *, complex *, complex *, complex *, integer *), ctgevc_(char *, char *, logical *, integer *, complex *, + integer *, complex *, integer *, complex *, integer *, complex *, + integer *, integer *, integer *, complex *, real *, integer *), xerbla_(char *, integer *); + logical ldumma[1]; + char chtemp[1]; + real bignum; + extern /* Subroutine */ int chgeqz_(char *, char *, char *, integer *, + integer *, integer *, complex *, integer *, complex *, integer *, + complex *, complex *, complex *, integer *, complex *, integer *, + complex *, integer *, real *, integer *); + extern integer ilaenv_(integer *, char *, char *, integer *, integer *, + integer *, integer *); + integer ijobvl, iright, ijobvr; + extern /* Subroutine */ int cungqr_(integer *, integer *, integer *, + complex *, integer *, complex *, complex *, integer *, integer *); + real anrmto; + integer lwkmin; + real bnrmto; + extern /* Subroutine */ int cunmqr_(char *, char *, integer *, integer *, + integer *, complex *, integer *, complex *, complex *, integer *, + complex *, integer *, integer *); + real smlnum; + integer lwkopt; + logical lquery; + + +/* -- LAPACK driver routine (version 3.2) -- */ +/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */ +/* November 2006 */ + +/* .. Scalar Arguments .. */ +/* .. */ +/* .. Array Arguments .. */ +/* .. */ + +/* Purpose */ +/* ======= */ + +/* CGGEV computes for a pair of N-by-N complex nonsymmetric matrices */ +/* (A,B), the generalized eigenvalues, and optionally, the left and/or */ +/* right generalized eigenvectors. */ + +/* A generalized eigenvalue for a pair of matrices (A,B) is a scalar */ +/* lambda or a ratio alpha/beta = lambda, such that A - lambda*B is */ +/* singular. It is usually represented as the pair (alpha,beta), as */ +/* there is a reasonable interpretation for beta=0, and even for both */ +/* being zero. */ + +/* The right generalized eigenvector v(j) corresponding to the */ +/* generalized eigenvalue lambda(j) of (A,B) satisfies */ + +/* A * v(j) = lambda(j) * B * v(j). */ + +/* The left generalized eigenvector u(j) corresponding to the */ +/* generalized eigenvalues lambda(j) of (A,B) satisfies */ + +/* u(j)**H * A = lambda(j) * u(j)**H * B */ + +/* where u(j)**H is the conjugate-transpose of u(j). */ + +/* Arguments */ +/* ========= */ + +/* JOBVL (input) CHARACTER*1 */ +/* = 'N': do not compute the left generalized eigenvectors; */ +/* = 'V': compute the left generalized eigenvectors. */ + +/* JOBVR (input) CHARACTER*1 */ +/* = 'N': do not compute the right generalized eigenvectors; */ +/* = 'V': compute the right generalized eigenvectors. */ + +/* N (input) INTEGER */ +/* The order of the matrices A, B, VL, and VR. N >= 0. */ + +/* A (input/output) COMPLEX array, dimension (LDA, N) */ +/* On entry, the matrix A in the pair (A,B). */ +/* On exit, A has been overwritten. */ + +/* LDA (input) INTEGER */ +/* The leading dimension of A. LDA >= max(1,N). */ + +/* B (input/output) COMPLEX array, dimension (LDB, N) */ +/* On entry, the matrix B in the pair (A,B). */ +/* On exit, B has been overwritten. */ + +/* LDB (input) INTEGER */ +/* The leading dimension of B. LDB >= max(1,N). */ + +/* ALPHA (output) COMPLEX array, dimension (N) */ +/* BETA (output) COMPLEX array, dimension (N) */ +/* On exit, ALPHA(j)/BETA(j), j=1,...,N, will be the */ +/* generalized eigenvalues. */ + +/* Note: the quotients ALPHA(j)/BETA(j) may easily over- or */ +/* underflow, and BETA(j) may even be zero. Thus, the user */ +/* should avoid naively computing the ratio alpha/beta. */ +/* However, ALPHA will be always less than and usually */ +/* comparable with norm(A) in magnitude, and BETA always less */ +/* than and usually comparable with norm(B). */ + +/* VL (output) COMPLEX array, dimension (LDVL,N) */ +/* If JOBVL = 'V', the left generalized eigenvectors u(j) are */ +/* stored one after another in the columns of VL, in the same */ +/* order as their eigenvalues. */ +/* Each eigenvector is scaled so the largest component has */ +/* abs(real part) + abs(imag. part) = 1. */ +/* Not referenced if JOBVL = 'N'. */ + +/* LDVL (input) INTEGER */ +/* The leading dimension of the matrix VL. LDVL >= 1, and */ +/* if JOBVL = 'V', LDVL >= N. */ + +/* VR (output) COMPLEX array, dimension (LDVR,N) */ +/* If JOBVR = 'V', the right generalized eigenvectors v(j) are */ +/* stored one after another in the columns of VR, in the same */ +/* order as their eigenvalues. */ +/* Each eigenvector is scaled so the largest component has */ +/* abs(real part) + abs(imag. part) = 1. */ +/* Not referenced if JOBVR = 'N'. */ + +/* LDVR (input) INTEGER */ +/* The leading dimension of the matrix VR. LDVR >= 1, and */ +/* if JOBVR = 'V', LDVR >= N. */ + +/* WORK (workspace/output) COMPLEX 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. LWORK >= max(1,2*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/output) REAL array, dimension (8*N) */ + +/* INFO (output) INTEGER */ +/* = 0: successful exit */ +/* < 0: if INFO = -i, the i-th argument had an illegal value. */ +/* =1,...,N: */ +/* The QZ iteration failed. No eigenvectors have been */ +/* calculated, but ALPHA(j) and BETA(j) should be */ +/* correct for j=INFO+1,...,N. */ +/* > N: =N+1: other then QZ iteration failed in SHGEQZ, */ +/* =N+2: error return from STGEVC. */ + +/* ===================================================================== */ + +/* .. Parameters .. */ +/* .. */ +/* .. Local Scalars .. */ +/* .. */ +/* .. Local Arrays .. */ +/* .. */ +/* .. External Subroutines .. */ +/* .. */ +/* .. External Functions .. */ +/* .. */ +/* .. Intrinsic Functions .. */ +/* .. */ +/* .. Statement Functions .. */ +/* .. */ +/* .. Statement Function definitions .. */ +/* .. */ +/* .. Executable Statements .. */ + +/* Decode the input arguments */ + + /* Parameter adjustments */ + a_dim1 = *lda; + a_offset = 1 + a_dim1; + a -= a_offset; + b_dim1 = *ldb; + b_offset = 1 + b_dim1; + b -= b_offset; + --alpha; + --beta; + vl_dim1 = *ldvl; + vl_offset = 1 + vl_dim1; + vl -= vl_offset; + vr_dim1 = *ldvr; + vr_offset = 1 + vr_dim1; + vr -= vr_offset; + --work; + --rwork; + + /* Function Body */ + if (lsame_(jobvl, "N")) { + ijobvl = 1; + ilvl = FALSE_; + } else if (lsame_(jobvl, "V")) { + ijobvl = 2; + ilvl = TRUE_; + } else { + ijobvl = -1; + ilvl = FALSE_; + } + + if (lsame_(jobvr, "N")) { + ijobvr = 1; + ilvr = FALSE_; + } else if (lsame_(jobvr, "V")) { + ijobvr = 2; + ilvr = TRUE_; + } else { + ijobvr = -1; + ilvr = FALSE_; + } + ilv = ilvl || ilvr; + +/* Test the input arguments */ + + *info = 0; + lquery = *lwork == -1; + if (ijobvl <= 0) { + *info = -1; + } else if (ijobvr <= 0) { + *info = -2; + } else if (*n < 0) { + *info = -3; + } else if (*lda < max(1,*n)) { + *info = -5; + } else if (*ldb < max(1,*n)) { + *info = -7; + } else if (*ldvl < 1 || ilvl && *ldvl < *n) { + *info = -11; + } else if (*ldvr < 1 || ilvr && *ldvr < *n) { + *info = -13; + } + +/* 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. The workspace is */ +/* computed assuming ILO = 1 and IHI = N, the worst case.) */ + + if (*info == 0) { +/* Computing MAX */ + i__1 = 1, i__2 = *n << 1; + lwkmin = max(i__1,i__2); +/* Computing MAX */ + i__1 = 1, i__2 = *n + *n * ilaenv_(&c__1, "CGEQRF", " ", n, &c__1, n, + &c__0); + lwkopt = max(i__1,i__2); +/* Computing MAX */ + i__1 = lwkopt, i__2 = *n + *n * ilaenv_(&c__1, "CUNMQR", " ", n, & + c__1, n, &c__0); + lwkopt = max(i__1,i__2); + if (ilvl) { +/* Computing MAX */ + i__1 = lwkopt, i__2 = *n + *n * ilaenv_(&c__1, "CUNGQR", " ", n, & + c__1, n, &c_n1); + lwkopt = max(i__1,i__2); + } + work[1].r = (real) lwkopt, work[1].i = 0.f; + + if (*lwork < lwkmin && ! lquery) { + *info = -15; + } + } + + if (*info != 0) { + i__1 = -(*info); + xerbla_("CGGEV ", &i__1); + return 0; + } else if (lquery) { + return 0; + } + +/* Quick return if possible */ + + if (*n == 0) { + return 0; + } + +/* Get machine constants */ + + eps = slamch_("E") * slamch_("B"); + smlnum = slamch_("S"); + bignum = 1.f / smlnum; + slabad_(&smlnum, &bignum); + smlnum = sqrt(smlnum) / eps; + bignum = 1.f / smlnum; + +/* Scale A if max element outside range [SMLNUM,BIGNUM] */ + + anrm = clange_("M", n, n, &a[a_offset], lda, &rwork[1]); + ilascl = FALSE_; + if (anrm > 0.f && anrm < smlnum) { + anrmto = smlnum; + ilascl = TRUE_; + } else if (anrm > bignum) { + anrmto = bignum; + ilascl = TRUE_; + } + if (ilascl) { + clascl_("G", &c__0, &c__0, &anrm, &anrmto, n, n, &a[a_offset], lda, & + ierr); + } + +/* Scale B if max element outside range [SMLNUM,BIGNUM] */ + + bnrm = clange_("M", n, n, &b[b_offset], ldb, &rwork[1]); + ilbscl = FALSE_; + if (bnrm > 0.f && bnrm < smlnum) { + bnrmto = smlnum; + ilbscl = TRUE_; + } else if (bnrm > bignum) { + bnrmto = bignum; + ilbscl = TRUE_; + } + if (ilbscl) { + clascl_("G", &c__0, &c__0, &bnrm, &bnrmto, n, n, &b[b_offset], ldb, & + ierr); + } + +/* Permute the matrices A, B to isolate eigenvalues if possible */ +/* (Real Workspace: need 6*N) */ + + ileft = 1; + iright = *n + 1; + irwrk = iright + *n; + cggbal_("P", n, &a[a_offset], lda, &b[b_offset], ldb, &ilo, &ihi, &rwork[ + ileft], &rwork[iright], &rwork[irwrk], &ierr); + +/* Reduce B to triangular form (QR decomposition of B) */ +/* (Complex Workspace: need N, prefer N*NB) */ + + irows = ihi + 1 - ilo; + if (ilv) { + icols = *n + 1 - ilo; + } else { + icols = irows; + } + itau = 1; + iwrk = itau + irows; + i__1 = *lwork + 1 - iwrk; + cgeqrf_(&irows, &icols, &b[ilo + ilo * b_dim1], ldb, &work[itau], &work[ + iwrk], &i__1, &ierr); + +/* Apply the orthogonal transformation to matrix A */ +/* (Complex Workspace: need N, prefer N*NB) */ + + i__1 = *lwork + 1 - iwrk; + cunmqr_("L", "C", &irows, &icols, &irows, &b[ilo + ilo * b_dim1], ldb, & + work[itau], &a[ilo + ilo * a_dim1], lda, &work[iwrk], &i__1, & + ierr); + +/* Initialize VL */ +/* (Complex Workspace: need N, prefer N*NB) */ + + if (ilvl) { + claset_("Full", n, n, &c_b1, &c_b2, &vl[vl_offset], ldvl); + if (irows > 1) { + i__1 = irows - 1; + i__2 = irows - 1; + clacpy_("L", &i__1, &i__2, &b[ilo + 1 + ilo * b_dim1], ldb, &vl[ + ilo + 1 + ilo * vl_dim1], ldvl); + } + i__1 = *lwork + 1 - iwrk; + cungqr_(&irows, &irows, &irows, &vl[ilo + ilo * vl_dim1], ldvl, &work[ + itau], &work[iwrk], &i__1, &ierr); + } + +/* Initialize VR */ + + if (ilvr) { + claset_("Full", n, n, &c_b1, &c_b2, &vr[vr_offset], ldvr); + } + +/* Reduce to generalized Hessenberg form */ + + if (ilv) { + +/* Eigenvectors requested -- work on whole matrix. */ + + cgghrd_(jobvl, jobvr, n, &ilo, &ihi, &a[a_offset], lda, &b[b_offset], + ldb, &vl[vl_offset], ldvl, &vr[vr_offset], ldvr, &ierr); + } else { + cgghrd_("N", "N", &irows, &c__1, &irows, &a[ilo + ilo * a_dim1], lda, + &b[ilo + ilo * b_dim1], ldb, &vl[vl_offset], ldvl, &vr[ + vr_offset], ldvr, &ierr); + } + +/* Perform QZ algorithm (Compute eigenvalues, and optionally, the */ +/* Schur form and Schur vectors) */ +/* (Complex Workspace: need N) */ +/* (Real Workspace: need N) */ + + iwrk = itau; + if (ilv) { + *(unsigned char *)chtemp = 'S'; + } else { + *(unsigned char *)chtemp = 'E'; + } + i__1 = *lwork + 1 - iwrk; + chgeqz_(chtemp, jobvl, jobvr, n, &ilo, &ihi, &a[a_offset], lda, &b[ + b_offset], ldb, &alpha[1], &beta[1], &vl[vl_offset], ldvl, &vr[ + vr_offset], ldvr, &work[iwrk], &i__1, &rwork[irwrk], &ierr); + if (ierr != 0) { + if (ierr > 0 && ierr <= *n) { + *info = ierr; + } else if (ierr > *n && ierr <= *n << 1) { + *info = ierr - *n; + } else { + *info = *n + 1; + } + goto L70; + } + +/* Compute Eigenvectors */ +/* (Real Workspace: need 2*N) */ +/* (Complex Workspace: need 2*N) */ + + if (ilv) { + if (ilvl) { + if (ilvr) { + *(unsigned char *)chtemp = 'B'; + } else { + *(unsigned char *)chtemp = 'L'; + } + } else { + *(unsigned char *)chtemp = 'R'; + } + + ctgevc_(chtemp, "B", ldumma, n, &a[a_offset], lda, &b[b_offset], ldb, + &vl[vl_offset], ldvl, &vr[vr_offset], ldvr, n, &in, &work[ + iwrk], &rwork[irwrk], &ierr); + if (ierr != 0) { + *info = *n + 2; + goto L70; + } + +/* Undo balancing on VL and VR and normalization */ +/* (Workspace: none needed) */ + + if (ilvl) { + cggbak_("P", "L", n, &ilo, &ihi, &rwork[ileft], &rwork[iright], n, + &vl[vl_offset], ldvl, &ierr); + i__1 = *n; + for (jc = 1; jc <= i__1; ++jc) { + temp = 0.f; + i__2 = *n; + for (jr = 1; jr <= i__2; ++jr) { +/* Computing MAX */ + i__3 = jr + jc * vl_dim1; + r__3 = temp, r__4 = (r__1 = vl[i__3].r, dabs(r__1)) + ( + r__2 = r_imag(&vl[jr + jc * vl_dim1]), dabs(r__2)) + ; + temp = dmax(r__3,r__4); +/* L10: */ + } + if (temp < smlnum) { + goto L30; + } + temp = 1.f / temp; + i__2 = *n; + for (jr = 1; jr <= i__2; ++jr) { + i__3 = jr + jc * vl_dim1; + i__4 = jr + jc * vl_dim1; + q__1.r = temp * vl[i__4].r, q__1.i = temp * vl[i__4].i; + vl[i__3].r = q__1.r, vl[i__3].i = q__1.i; +/* L20: */ + } +L30: + ; + } + } + if (ilvr) { + cggbak_("P", "R", n, &ilo, &ihi, &rwork[ileft], &rwork[iright], n, + &vr[vr_offset], ldvr, &ierr); + i__1 = *n; + for (jc = 1; jc <= i__1; ++jc) { + temp = 0.f; + i__2 = *n; + for (jr = 1; jr <= i__2; ++jr) { +/* Computing MAX */ + i__3 = jr + jc * vr_dim1; + r__3 = temp, r__4 = (r__1 = vr[i__3].r, dabs(r__1)) + ( + r__2 = r_imag(&vr[jr + jc * vr_dim1]), dabs(r__2)) + ; + temp = dmax(r__3,r__4); +/* L40: */ + } + if (temp < smlnum) { + goto L60; + } + temp = 1.f / temp; + i__2 = *n; + for (jr = 1; jr <= i__2; ++jr) { + i__3 = jr + jc * vr_dim1; + i__4 = jr + jc * vr_dim1; + q__1.r = temp * vr[i__4].r, q__1.i = temp * vr[i__4].i; + vr[i__3].r = q__1.r, vr[i__3].i = q__1.i; +/* L50: */ + } +L60: + ; + } + } + } + +/* Undo scaling if necessary */ + + if (ilascl) { + clascl_("G", &c__0, &c__0, &anrmto, &anrm, n, &c__1, &alpha[1], n, & + ierr); + } + + if (ilbscl) { + clascl_("G", &c__0, &c__0, &bnrmto, &bnrm, n, &c__1, &beta[1], n, & + ierr); + } + +L70: + work[1].r = (real) lwkopt, work[1].i = 0.f; + + return 0; + +/* End of CGGEV */ + +} /* cggev_ */ |