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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/cpotrs.c | |
parent | 01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff) | |
download | ydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz |
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/cpotrs.c')
-rw-r--r-- | contrib/libs/clapack/cpotrs.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/contrib/libs/clapack/cpotrs.c b/contrib/libs/clapack/cpotrs.c new file mode 100644 index 0000000000..d65ce4e320 --- /dev/null +++ b/contrib/libs/clapack/cpotrs.c @@ -0,0 +1,165 @@ +/* cpotrs.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 = {1.f,0.f}; + +/* Subroutine */ int cpotrs_(char *uplo, integer *n, integer *nrhs, complex * + a, integer *lda, complex *b, integer *ldb, integer *info) +{ + /* System generated locals */ + integer a_dim1, a_offset, b_dim1, b_offset, i__1; + + /* Local variables */ + extern logical lsame_(char *, char *); + extern /* Subroutine */ int ctrsm_(char *, char *, char *, char *, + integer *, integer *, complex *, complex *, integer *, complex *, + integer *); + logical upper; + extern /* Subroutine */ int xerbla_(char *, integer *); + + +/* -- LAPACK routine (version 3.2) -- */ +/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */ +/* November 2006 */ + +/* .. Scalar Arguments .. */ +/* .. */ +/* .. Array Arguments .. */ +/* .. */ + +/* Purpose */ +/* ======= */ + +/* CPOTRS solves a system of linear equations A*X = B with a Hermitian */ +/* positive definite matrix A using the Cholesky factorization */ +/* A = U**H*U or A = L*L**H computed by CPOTRF. */ + +/* Arguments */ +/* ========= */ + +/* UPLO (input) CHARACTER*1 */ +/* = 'U': Upper triangle of A is stored; */ +/* = 'L': Lower triangle of A is stored. */ + +/* N (input) INTEGER */ +/* 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) COMPLEX array, dimension (LDA,N) */ +/* The triangular factor U or L from the Cholesky factorization */ +/* A = U**H*U or A = L*L**H, as computed by CPOTRF. */ + +/* LDA (input) INTEGER */ +/* The leading dimension of the array A. LDA >= max(1,N). */ + +/* B (input/output) COMPLEX array, dimension (LDB,NRHS) */ +/* On entry, the right hand side matrix B. */ +/* On exit, the 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 */ + +/* ===================================================================== */ + +/* .. Parameters .. */ +/* .. */ +/* .. 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; + b_dim1 = *ldb; + b_offset = 1 + b_dim1; + b -= b_offset; + + /* Function Body */ + *info = 0; + upper = lsame_(uplo, "U"); + if (! upper && ! 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 = -7; + } + if (*info != 0) { + i__1 = -(*info); + xerbla_("CPOTRS", &i__1); + return 0; + } + +/* Quick return if possible */ + + if (*n == 0 || *nrhs == 0) { + return 0; + } + + if (upper) { + +/* Solve A*X = B where A = U'*U. */ + +/* Solve U'*X = B, overwriting B with X. */ + + ctrsm_("Left", "Upper", "Conjugate transpose", "Non-unit", n, nrhs, & + c_b1, &a[a_offset], lda, &b[b_offset], ldb); + +/* Solve U*X = B, overwriting B with X. */ + + ctrsm_("Left", "Upper", "No transpose", "Non-unit", n, nrhs, &c_b1, & + a[a_offset], lda, &b[b_offset], ldb); + } else { + +/* Solve A*X = B where A = L*L'. */ + +/* Solve L*X = B, overwriting B with X. */ + + ctrsm_("Left", "Lower", "No transpose", "Non-unit", n, nrhs, &c_b1, & + a[a_offset], lda, &b[b_offset], ldb); + +/* Solve L'*X = B, overwriting B with X. */ + + ctrsm_("Left", "Lower", "Conjugate transpose", "Non-unit", n, nrhs, & + c_b1, &a[a_offset], lda, &b[b_offset], ldb); + } + + return 0; + +/* End of CPOTRS */ + +} /* cpotrs_ */ |