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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/cpbsv.c
parent01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff)
downloadydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/cpbsv.c')
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1 files changed, 182 insertions, 0 deletions
diff --git a/contrib/libs/clapack/cpbsv.c b/contrib/libs/clapack/cpbsv.c
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+/* cpbsv.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"
+
+/* Subroutine */ int cpbsv_(char *uplo, integer *n, integer *kd, integer *
+ nrhs, complex *ab, integer *ldab, complex *b, integer *ldb, integer *
+ info)
+{
+ /* System generated locals */
+ integer ab_dim1, ab_offset, b_dim1, b_offset, i__1;
+
+ /* Local variables */
+ extern logical lsame_(char *, char *);
+ extern /* Subroutine */ int xerbla_(char *, integer *), cpbtrf_(
+ char *, integer *, integer *, complex *, integer *, integer *), cpbtrs_(char *, integer *, integer *, integer *, complex
+ *, integer *, complex *, integer *, integer *);
+
+
+/* -- LAPACK driver routine (version 3.2) -- */
+/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/* November 2006 */
+
+/* .. Scalar Arguments .. */
+/* .. */
+/* .. Array Arguments .. */
+/* .. */
+
+/* Purpose */
+/* ======= */
+
+/* CPBSV computes the solution to a complex system of linear equations */
+/* A * X = B, */
+/* where A is an N-by-N Hermitian positive definite band matrix and X */
+/* and B are N-by-NRHS matrices. */
+
+/* The Cholesky decomposition is used to factor A as */
+/* A = U**H * U, if UPLO = 'U', or */
+/* A = L * L**H, if UPLO = 'L', */
+/* where U is an upper triangular band matrix, and L is a lower */
+/* triangular band matrix, with the same number of superdiagonals or */
+/* subdiagonals as A. The factored form of A is then used to solve the */
+/* system of equations A * X = B. */
+
+/* Arguments */
+/* ========= */
+
+/* UPLO (input) CHARACTER*1 */
+/* = 'U': Upper triangle of A is stored; */
+/* = 'L': Lower triangle of A is stored. */
+
+/* N (input) INTEGER */
+/* The number of linear equations, i.e., the order of the */
+/* matrix A. N >= 0. */
+
+/* KD (input) INTEGER */
+/* The number of superdiagonals of the matrix A if UPLO = 'U', */
+/* or the number of subdiagonals if UPLO = 'L'. KD >= 0. */
+
+/* NRHS (input) INTEGER */
+/* The number of right hand sides, i.e., the number of columns */
+/* of the matrix B. NRHS >= 0. */
+
+/* AB (input/output) COMPLEX array, dimension (LDAB,N) */
+/* On entry, the upper or lower triangle of the Hermitian band */
+/* matrix A, stored in the first KD+1 rows of the array. The */
+/* j-th column of A is stored in the j-th column of the array AB */
+/* as follows: */
+/* if UPLO = 'U', AB(KD+1+i-j,j) = A(i,j) for max(1,j-KD)<=i<=j; */
+/* if UPLO = 'L', AB(1+i-j,j) = A(i,j) for j<=i<=min(N,j+KD). */
+/* See below for further details. */
+
+/* On exit, if INFO = 0, the triangular factor U or L from the */
+/* Cholesky factorization A = U**H*U or A = L*L**H of the band */
+/* matrix A, in the same storage format as A. */
+
+/* LDAB (input) INTEGER */
+/* The leading dimension of the array AB. LDAB >= KD+1. */
+
+/* B (input/output) COMPLEX array, dimension (LDB,NRHS) */
+/* On entry, the N-by-NRHS right hand side matrix B. */
+/* On exit, if INFO = 0, the N-by-NRHS solution matrix X. */
+
+/* LDB (input) INTEGER */
+/* The leading dimension of the array B. LDB >= max(1,N). */
+
+/* INFO (output) INTEGER */
+/* = 0: successful exit */
+/* < 0: if INFO = -i, the i-th argument had an illegal value */
+/* > 0: if INFO = i, the leading minor of order i of A is not */
+/* positive definite, so the factorization could not be */
+/* completed, and the solution has not been computed. */
+
+/* Further Details */
+/* =============== */
+
+/* The band storage scheme is illustrated by the following example, when */
+/* N = 6, KD = 2, and UPLO = 'U': */
+
+/* On entry: On exit: */
+
+/* * * a13 a24 a35 a46 * * u13 u24 u35 u46 */
+/* * a12 a23 a34 a45 a56 * u12 u23 u34 u45 u56 */
+/* a11 a22 a33 a44 a55 a66 u11 u22 u33 u44 u55 u66 */
+
+/* Similarly, if UPLO = 'L' the format of A is as follows: */
+
+/* On entry: On exit: */
+
+/* a11 a22 a33 a44 a55 a66 l11 l22 l33 l44 l55 l66 */
+/* a21 a32 a43 a54 a65 * l21 l32 l43 l54 l65 * */
+/* a31 a42 a53 a64 * * l31 l42 l53 l64 * * */
+
+/* Array elements marked * are not used by the routine. */
+
+/* ===================================================================== */
+
+/* .. External Functions .. */
+/* .. */
+/* .. External Subroutines .. */
+/* .. */
+/* .. Intrinsic Functions .. */
+/* .. */
+/* .. Executable Statements .. */
+
+/* Test the input parameters. */
+
+ /* Parameter adjustments */
+ ab_dim1 = *ldab;
+ ab_offset = 1 + ab_dim1;
+ ab -= ab_offset;
+ b_dim1 = *ldb;
+ b_offset = 1 + b_dim1;
+ b -= b_offset;
+
+ /* Function Body */
+ *info = 0;
+ if (! lsame_(uplo, "U") && ! lsame_(uplo, "L")) {
+ *info = -1;
+ } else if (*n < 0) {
+ *info = -2;
+ } else if (*kd < 0) {
+ *info = -3;
+ } else if (*nrhs < 0) {
+ *info = -4;
+ } else if (*ldab < *kd + 1) {
+ *info = -6;
+ } else if (*ldb < max(1,*n)) {
+ *info = -8;
+ }
+ if (*info != 0) {
+ i__1 = -(*info);
+ xerbla_("CPBSV ", &i__1);
+ return 0;
+ }
+
+/* Compute the Cholesky factorization A = U'*U or A = L*L'. */
+
+ cpbtrf_(uplo, n, kd, &ab[ab_offset], ldab, info);
+ if (*info == 0) {
+
+/* Solve the system A*X = B, overwriting B with X. */
+
+ cpbtrs_(uplo, n, kd, nrhs, &ab[ab_offset], ldab, &b[b_offset], ldb,
+ info);
+
+ }
+ return 0;
+
+/* End of CPBSV */
+
+} /* cpbsv_ */