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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/zspsv.c | |
parent | 01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff) | |
download | ydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz |
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/zspsv.c')
-rw-r--r-- | contrib/libs/clapack/zspsv.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/contrib/libs/clapack/zspsv.c b/contrib/libs/clapack/zspsv.c new file mode 100644 index 0000000000..1794a155b5 --- /dev/null +++ b/contrib/libs/clapack/zspsv.c @@ -0,0 +1,177 @@ +/* zspsv.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 zspsv_(char *uplo, integer *n, integer *nrhs, + doublecomplex *ap, integer *ipiv, doublecomplex *b, integer *ldb, + integer *info) +{ + /* System generated locals */ + integer b_dim1, b_offset, i__1; + + /* Local variables */ + extern logical lsame_(char *, char *); + extern /* Subroutine */ int xerbla_(char *, integer *), zsptrf_( + char *, integer *, doublecomplex *, integer *, integer *), + zsptrs_(char *, integer *, integer *, doublecomplex *, integer *, + doublecomplex *, 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 */ +/* ======= */ + +/* ZSPSV computes the solution to a complex system of linear equations */ +/* A * X = B, */ +/* where A is an N-by-N symmetric matrix stored in packed format 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, 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. */ + +/* AP (input/output) COMPLEX*16 array, dimension (N*(N+1)/2) */ +/* On entry, the upper or lower triangle of the symmetric matrix */ +/* A, packed columnwise in a linear array. The j-th column of A */ +/* is stored in the array AP as follows: */ +/* if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j; */ +/* if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n. */ +/* See below for further details. */ + +/* On exit, 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 ZSPTRF, stored as */ +/* a packed triangular matrix in the same storage format as A. */ + +/* IPIV (output) INTEGER array, dimension (N) */ +/* Details of the interchanges and the block structure of D, as */ +/* determined by ZSPTRF. 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*16 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, 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. */ + +/* Further Details */ +/* =============== */ + +/* The packed storage scheme is illustrated by the following example */ +/* when N = 4, UPLO = 'U': */ + +/* Two-dimensional storage of the symmetric matrix A: */ + +/* a11 a12 a13 a14 */ +/* a22 a23 a24 */ +/* a33 a34 (aij = aji) */ +/* a44 */ + +/* Packed storage of the upper triangle of A: */ + +/* AP = [ a11, a12, a22, a13, a23, a33, a14, a24, a34, a44 ] */ + +/* ===================================================================== */ + +/* .. External Functions .. */ +/* .. */ +/* .. External Subroutines .. */ +/* .. */ +/* .. Intrinsic Functions .. */ +/* .. */ +/* .. Executable Statements .. */ + +/* Test the input parameters. */ + + /* Parameter adjustments */ + --ap; + --ipiv; + 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 (*nrhs < 0) { + *info = -3; + } else if (*ldb < max(1,*n)) { + *info = -7; + } + if (*info != 0) { + i__1 = -(*info); + xerbla_("ZSPSV ", &i__1); + return 0; + } + +/* Compute the factorization A = U*D*U' or A = L*D*L'. */ + + zsptrf_(uplo, n, &ap[1], &ipiv[1], info); + if (*info == 0) { + +/* Solve the system A*X = B, overwriting B with X. */ + + zsptrs_(uplo, n, nrhs, &ap[1], &ipiv[1], &b[b_offset], ldb, info); + + } + return 0; + +/* End of ZSPSV */ + +} /* zspsv_ */ |