aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/clapack/cunglq.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/cunglq.c
parent01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff)
downloadydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/cunglq.c')
-rw-r--r--contrib/libs/clapack/cunglq.c284
1 files changed, 284 insertions, 0 deletions
diff --git a/contrib/libs/clapack/cunglq.c b/contrib/libs/clapack/cunglq.c
new file mode 100644
index 0000000000..9165a4702c
--- /dev/null
+++ b/contrib/libs/clapack/cunglq.c
@@ -0,0 +1,284 @@
+/* cunglq.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_n1 = -1;
+static integer c__3 = 3;
+static integer c__2 = 2;
+
+/* Subroutine */ int cunglq_(integer *m, integer *n, integer *k, complex *a,
+ integer *lda, complex *tau, complex *work, integer *lwork, integer *
+ info)
+{
+ /* System generated locals */
+ integer a_dim1, a_offset, i__1, i__2, i__3, i__4;
+
+ /* Local variables */
+ integer i__, j, l, ib, nb, ki, kk, nx, iws, nbmin, iinfo;
+ extern /* Subroutine */ int cungl2_(integer *, integer *, integer *,
+ complex *, integer *, complex *, complex *, integer *), clarfb_(
+ char *, char *, char *, char *, integer *, integer *, integer *,
+ complex *, integer *, complex *, integer *, complex *, integer *,
+ complex *, integer *), clarft_(
+ char *, char *, integer *, integer *, complex *, integer *,
+ complex *, complex *, integer *), xerbla_(char *,
+ integer *);
+ extern integer ilaenv_(integer *, char *, char *, integer *, integer *,
+ integer *, integer *);
+ integer ldwork, lwkopt;
+ logical lquery;
+
+
+/* -- LAPACK routine (version 3.2) -- */
+/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/* November 2006 */
+
+/* .. Scalar Arguments .. */
+/* .. */
+/* .. Array Arguments .. */
+/* .. */
+
+/* Purpose */
+/* ======= */
+
+/* CUNGLQ generates an M-by-N complex matrix Q with orthonormal rows, */
+/* which is defined as the first M rows of a product of K elementary */
+/* reflectors of order N */
+
+/* Q = H(k)' . . . H(2)' H(1)' */
+
+/* as returned by CGELQF. */
+
+/* Arguments */
+/* ========= */
+
+/* M (input) INTEGER */
+/* The number of rows of the matrix Q. M >= 0. */
+
+/* N (input) INTEGER */
+/* The number of columns of the matrix Q. N >= M. */
+
+/* K (input) INTEGER */
+/* The number of elementary reflectors whose product defines the */
+/* matrix Q. M >= K >= 0. */
+
+/* A (input/output) COMPLEX array, dimension (LDA,N) */
+/* On entry, the i-th row must contain the vector which defines */
+/* the elementary reflector H(i), for i = 1,2,...,k, as returned */
+/* by CGELQF in the first k rows of its array argument A. */
+/* On exit, the M-by-N matrix Q. */
+
+/* LDA (input) INTEGER */
+/* The first dimension of the array A. LDA >= max(1,M). */
+
+/* TAU (input) COMPLEX array, dimension (K) */
+/* TAU(i) must contain the scalar factor of the elementary */
+/* reflector H(i), as returned by CGELQF. */
+
+/* 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,M). */
+/* For optimum performance LWORK >= M*NB, where NB is */
+/* the optimal blocksize. */
+
+/* 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. */
+
+/* INFO (output) INTEGER */
+/* = 0: successful exit; */
+/* < 0: if INFO = -i, the i-th argument has an illegal value */
+
+/* ===================================================================== */
+
+/* .. Parameters .. */
+/* .. */
+/* .. Local Scalars .. */
+/* .. */
+/* .. External Subroutines .. */
+/* .. */
+/* .. Intrinsic Functions .. */
+/* .. */
+/* .. External Functions .. */
+/* .. */
+/* .. Executable Statements .. */
+
+/* Test the input arguments */
+
+ /* Parameter adjustments */
+ a_dim1 = *lda;
+ a_offset = 1 + a_dim1;
+ a -= a_offset;
+ --tau;
+ --work;
+
+ /* Function Body */
+ *info = 0;
+ nb = ilaenv_(&c__1, "CUNGLQ", " ", m, n, k, &c_n1);
+ lwkopt = max(1,*m) * nb;
+ work[1].r = (real) lwkopt, work[1].i = 0.f;
+ lquery = *lwork == -1;
+ if (*m < 0) {
+ *info = -1;
+ } else if (*n < *m) {
+ *info = -2;
+ } else if (*k < 0 || *k > *m) {
+ *info = -3;
+ } else if (*lda < max(1,*m)) {
+ *info = -5;
+ } else if (*lwork < max(1,*m) && ! lquery) {
+ *info = -8;
+ }
+ if (*info != 0) {
+ i__1 = -(*info);
+ xerbla_("CUNGLQ", &i__1);
+ return 0;
+ } else if (lquery) {
+ return 0;
+ }
+
+/* Quick return if possible */
+
+ if (*m <= 0) {
+ work[1].r = 1.f, work[1].i = 0.f;
+ return 0;
+ }
+
+ nbmin = 2;
+ nx = 0;
+ iws = *m;
+ if (nb > 1 && nb < *k) {
+
+/* Determine when to cross over from blocked to unblocked code. */
+
+/* Computing MAX */
+ i__1 = 0, i__2 = ilaenv_(&c__3, "CUNGLQ", " ", m, n, k, &c_n1);
+ nx = max(i__1,i__2);
+ if (nx < *k) {
+
+/* Determine if workspace is large enough for blocked code. */
+
+ ldwork = *m;
+ iws = ldwork * nb;
+ if (*lwork < iws) {
+
+/* Not enough workspace to use optimal NB: reduce NB and */
+/* determine the minimum value of NB. */
+
+ nb = *lwork / ldwork;
+/* Computing MAX */
+ i__1 = 2, i__2 = ilaenv_(&c__2, "CUNGLQ", " ", m, n, k, &c_n1);
+ nbmin = max(i__1,i__2);
+ }
+ }
+ }
+
+ if (nb >= nbmin && nb < *k && nx < *k) {
+
+/* Use blocked code after the last block. */
+/* The first kk rows are handled by the block method. */
+
+ ki = (*k - nx - 1) / nb * nb;
+/* Computing MIN */
+ i__1 = *k, i__2 = ki + nb;
+ kk = min(i__1,i__2);
+
+/* Set A(kk+1:m,1:kk) to zero. */
+
+ i__1 = kk;
+ for (j = 1; j <= i__1; ++j) {
+ i__2 = *m;
+ for (i__ = kk + 1; i__ <= i__2; ++i__) {
+ i__3 = i__ + j * a_dim1;
+ a[i__3].r = 0.f, a[i__3].i = 0.f;
+/* L10: */
+ }
+/* L20: */
+ }
+ } else {
+ kk = 0;
+ }
+
+/* Use unblocked code for the last or only block. */
+
+ if (kk < *m) {
+ i__1 = *m - kk;
+ i__2 = *n - kk;
+ i__3 = *k - kk;
+ cungl2_(&i__1, &i__2, &i__3, &a[kk + 1 + (kk + 1) * a_dim1], lda, &
+ tau[kk + 1], &work[1], &iinfo);
+ }
+
+ if (kk > 0) {
+
+/* Use blocked code */
+
+ i__1 = -nb;
+ for (i__ = ki + 1; i__1 < 0 ? i__ >= 1 : i__ <= 1; i__ += i__1) {
+/* Computing MIN */
+ i__2 = nb, i__3 = *k - i__ + 1;
+ ib = min(i__2,i__3);
+ if (i__ + ib <= *m) {
+
+/* Form the triangular factor of the block reflector */
+/* H = H(i) H(i+1) . . . H(i+ib-1) */
+
+ i__2 = *n - i__ + 1;
+ clarft_("Forward", "Rowwise", &i__2, &ib, &a[i__ + i__ *
+ a_dim1], lda, &tau[i__], &work[1], &ldwork);
+
+/* Apply H' to A(i+ib:m,i:n) from the right */
+
+ i__2 = *m - i__ - ib + 1;
+ i__3 = *n - i__ + 1;
+ clarfb_("Right", "Conjugate transpose", "Forward", "Rowwise",
+ &i__2, &i__3, &ib, &a[i__ + i__ * a_dim1], lda, &work[
+ 1], &ldwork, &a[i__ + ib + i__ * a_dim1], lda, &work[
+ ib + 1], &ldwork);
+ }
+
+/* Apply H' to columns i:n of current block */
+
+ i__2 = *n - i__ + 1;
+ cungl2_(&ib, &i__2, &ib, &a[i__ + i__ * a_dim1], lda, &tau[i__], &
+ work[1], &iinfo);
+
+/* Set columns 1:i-1 of current block to zero */
+
+ i__2 = i__ - 1;
+ for (j = 1; j <= i__2; ++j) {
+ i__3 = i__ + ib - 1;
+ for (l = i__; l <= i__3; ++l) {
+ i__4 = l + j * a_dim1;
+ a[i__4].r = 0.f, a[i__4].i = 0.f;
+/* L30: */
+ }
+/* L40: */
+ }
+/* L50: */
+ }
+ }
+
+ work[1].r = (real) iws, work[1].i = 0.f;
+ return 0;
+
+/* End of CUNGLQ */
+
+} /* cunglq_ */