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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/csysv.c | |
parent | 01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff) | |
download | ydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz |
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/csysv.c')
-rw-r--r-- | contrib/libs/clapack/csysv.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/contrib/libs/clapack/csysv.c b/contrib/libs/clapack/csysv.c new file mode 100644 index 0000000000..c5e682ddad --- /dev/null +++ b/contrib/libs/clapack/csysv.c @@ -0,0 +1,214 @@ +/* csysv.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; + +/* Subroutine */ int csysv_(char *uplo, integer *n, integer *nrhs, complex *a, + integer *lda, integer *ipiv, complex *b, integer *ldb, complex *work, + integer *lwork, integer *info) +{ + /* System generated locals */ + integer a_dim1, a_offset, b_dim1, b_offset, i__1; + + /* Local variables */ + integer nb; + extern logical lsame_(char *, char *); + extern /* Subroutine */ int xerbla_(char *, integer *); + extern integer ilaenv_(integer *, char *, char *, integer *, integer *, + integer *, integer *); + extern /* Subroutine */ int csytrf_(char *, integer *, complex *, integer + *, integer *, complex *, integer *, integer *); + integer lwkopt; + logical lquery; + extern /* Subroutine */ int csytrs_(char *, integer *, integer *, complex + *, integer *, 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 */ +/* ======= */ + +/* CSYSV computes the solution to a complex system of linear equations */ +/* A * X = B, */ +/* where A is an N-by-N symmetric matrix and X and B are N-by-NRHS */ +/* matrices. */ + +/* The diagonal pivoting method is used to factor A as */ +/* A = U * D * U**T, if UPLO = 'U', or */ +/* A = L * D * L**T, if UPLO = 'L', */ +/* where U (or L) is a product of permutation and unit upper (lower) */ +/* triangular matrices, and D is symmetric and block diagonal with */ +/* 1-by-1 and 2-by-2 diagonal blocks. 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. */ + +/* NRHS (input) INTEGER */ +/* The number of right hand sides, i.e., the number of columns */ +/* of the matrix B. NRHS >= 0. */ + +/* A (input/output) COMPLEX array, dimension (LDA,N) */ +/* On entry, the symmetric matrix A. If UPLO = 'U', the leading */ +/* N-by-N upper triangular part of A contains the upper */ +/* triangular part of the matrix A, and the strictly lower */ +/* triangular part of A is not referenced. If UPLO = 'L', the */ +/* leading N-by-N lower triangular part of A contains the lower */ +/* triangular part of the matrix A, and the strictly upper */ +/* triangular part of A is not referenced. */ + +/* On exit, if INFO = 0, the block diagonal matrix D and the */ +/* multipliers used to obtain the factor U or L from the */ +/* factorization A = U*D*U**T or A = L*D*L**T as computed by */ +/* CSYTRF. */ + +/* LDA (input) INTEGER */ +/* The leading dimension of the array A. LDA >= max(1,N). */ + +/* IPIV (output) INTEGER array, dimension (N) */ +/* Details of the interchanges and the block structure of D, as */ +/* determined by CSYTRF. If IPIV(k) > 0, then rows and columns */ +/* k and IPIV(k) were interchanged, and D(k,k) is a 1-by-1 */ +/* diagonal block. If UPLO = 'U' and IPIV(k) = IPIV(k-1) < 0, */ +/* then rows and columns k-1 and -IPIV(k) were interchanged and */ +/* D(k-1:k,k-1:k) is a 2-by-2 diagonal block. If UPLO = 'L' and */ +/* IPIV(k) = IPIV(k+1) < 0, then rows and columns k+1 and */ +/* -IPIV(k) were interchanged and D(k:k+1,k:k+1) is a 2-by-2 */ +/* diagonal block. */ + +/* 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). */ + +/* WORK (workspace/output) COMPLEX array, dimension (MAX(1,LWORK)) */ +/* On exit, if INFO = 0, WORK(1) returns the optimal LWORK. */ + +/* LWORK (input) INTEGER */ +/* The length of WORK. LWORK >= 1, and for best performance */ +/* LWORK >= max(1,N*NB), where NB is the optimal blocksize for */ +/* CSYTRF. */ + +/* 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 had an illegal value */ +/* > 0: if INFO = i, D(i,i) is exactly zero. The factorization */ +/* has been completed, but the block diagonal matrix D is */ +/* exactly singular, so the solution could not be computed. */ + +/* ===================================================================== */ + +/* .. Local Scalars .. */ +/* .. */ +/* .. External Functions .. */ +/* .. */ +/* .. External Subroutines .. */ +/* .. */ +/* .. Intrinsic Functions .. */ +/* .. */ +/* .. Executable Statements .. */ + +/* Test the input parameters. */ + + /* Parameter adjustments */ + a_dim1 = *lda; + a_offset = 1 + a_dim1; + a -= a_offset; + --ipiv; + b_dim1 = *ldb; + b_offset = 1 + b_dim1; + b -= b_offset; + --work; + + /* Function Body */ + *info = 0; + lquery = *lwork == -1; + if (! lsame_(uplo, "U") && ! lsame_(uplo, "L")) { + *info = -1; + } else if (*n < 0) { + *info = -2; + } else if (*nrhs < 0) { + *info = -3; + } else if (*lda < max(1,*n)) { + *info = -5; + } else if (*ldb < max(1,*n)) { + *info = -8; + } else if (*lwork < 1 && ! lquery) { + *info = -10; + } + + if (*info == 0) { + if (*n == 0) { + lwkopt = 1; + } else { + nb = ilaenv_(&c__1, "CSYTRF", uplo, n, &c_n1, &c_n1, &c_n1); + lwkopt = *n * nb; + } + work[1].r = (real) lwkopt, work[1].i = 0.f; + } + + if (*info != 0) { + i__1 = -(*info); + xerbla_("CSYSV ", &i__1); + return 0; + } else if (lquery) { + return 0; + } + +/* Compute the factorization A = U*D*U' or A = L*D*L'. */ + + csytrf_(uplo, n, &a[a_offset], lda, &ipiv[1], &work[1], lwork, info); + if (*info == 0) { + +/* Solve the system A*X = B, overwriting B with X. */ + + csytrs_(uplo, n, nrhs, &a[a_offset], lda, &ipiv[1], &b[b_offset], ldb, + info); + + } + + work[1].r = (real) lwkopt, work[1].i = 0.f; + + return 0; + +/* End of CSYSV */ + +} /* csysv_ */ |