dlaed0.f – Synopsis Functions/Subroutines subroutine dlaed0 (ICOMPQ, QSIZ, N, D, E, Q, LDQ, QSTORE, LDQS, WORK, IWORK, INFO) DLAED0 used by sstedc. Computes all eigenvalues and corresponding eigenvectors of an unreduced symmetric tridiagonal matrix using the divide and conquer method. Function/Subroutine Documentation subroutine dlaed0 (integerICOMPQ, integerQSIZ, integerN, double precision, dimension( * )D, double precision, dimension(…
dlaebz.f – Synopsis Functions/Subroutines subroutine dlaebz (IJOB, NITMAX, N, MMAX, MINP, NBMIN, ABSTOL, RELTOL, PIVMIN, D, E, E2, NVAL, AB, C, MOUT, NAB, WORK, IWORK, INFO) DLAEBZ computes the number of eigenvalues of a real symmetric tridiagonal matrix which are less than or equal to a given value, and performs other tasks required by the…
dlae2.f – Synopsis Functions/Subroutines subroutine dlae2 (A, B, C, RT1, RT2) DLAE2 computes the eigenvalues of a 2-by-2 symmetric matrix. Function/Subroutine Documentation subroutine dlae2 (double precisionA, double precisionB, double precisionC, double precisionRT1, double precisionRT2) DLAE2 computes the eigenvalues of a 2-by-2 symmetric matrix. Purpose: DLAE2 computes the eigenvalues of a 2-by-2 symmetric matrix [ A…
NAME dladiv.f – SYNOPSIS Functions/Subroutines subroutine dladiv (A, B, C, D, P, Q) DLADIV performs complex division in real arithmetic, avoiding unnecessary overflow. subroutine dladiv1 (A, B, C, D, P, Q) DOUBLE PRECISION function dladiv2 (A, B, C, D, R, T) Function/Subroutine Documentation subroutine dladiv (double precisionA, double precisionB, double precisionC, double precisionD, double precisionP,…
NAME dladiv.f – SYNOPSIS Functions/Subroutines subroutine dladiv (A, B, C, D, P, Q) DLADIV performs complex division in real arithmetic, avoiding unnecessary overflow. subroutine dladiv1 (A, B, C, D, P, Q) DOUBLE PRECISION function dladiv2 (A, B, C, D, R, T) Function/Subroutine Documentation subroutine dladiv (double precisionA, double precisionB, double precisionC, double precisionD, double precisionP,…
dladiv.f – Synopsis Functions/Subroutines subroutine dladiv (A, B, C, D, P, Q) DLADIV performs complex division in real arithmetic, avoiding unnecessary overflow. Function/Subroutine Documentation subroutine dladiv (double precisionA, double precisionB, double precisionC, double precisionD, double precisionP, double precisionQ) DLADIV performs complex division in real arithmetic, avoiding unnecessary overflow. Purpose: DLADIV performs complex division in real…
NAME dladdr, dladdr1 – translate address to symbolic information SYNOPSIS #define _GNU_SOURCE #include <dlfcn.h> int dladdr(void *addr, Dl_info *info); int dladdr1(void *addr, Dl_info *info, void **extra_info, int flags); Link with – ldl. DESCRIPTION The function dladdr() determines whether the address specified in addr is located in one of the shared objects loaded by the calling…
NAME dladdr, dladdr1 – translate address to symbolic information SYNOPSIS #define _GNU_SOURCE #include <dlfcn.h> int dladdr(void *addr, Dl_info *info); int dladdr1(void *addr, Dl_info *info, void **extra_info, int flags); Link with – ldl. DESCRIPTION The function dladdr() determines whether the address specified in addr is located in one of the shared objects loaded by the calling…
dlacpy.f – Synopsis Functions/Subroutines subroutine dlacpy (UPLO, M, N, A, LDA, B, LDB) DLACPY copies all or part of one two-dimensional array to another. Function/Subroutine Documentation subroutine dlacpy (characterUPLO, integerM, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB) DLACPY copies all or part of one two-dimensional array to…
dlacon.f – Synopsis Functions/Subroutines subroutine dlacon (N, V, X, ISGN, EST, KASE) DLACON estimates the 1-norm of a square matrix, using reverse communication for evaluating matrix-vector products. Function/Subroutine Documentation subroutine dlacon (integerN, double precision, dimension( * )V, double precision, dimension( * )X, integer, dimension( * )ISGN, double precisionEST, integerKASE) DLACON estimates the 1-norm of a…
dlacn2.f – Synopsis Functions/Subroutines subroutine dlacn2 (N, V, X, ISGN, EST, KASE, ISAVE) DLACN2 estimates the 1-norm of a square matrix, using reverse communication for evaluating matrix-vector products. Function/Subroutine Documentation subroutine dlacn2 (integerN, double precision, dimension( * )V, double precision, dimension( * )X, integer, dimension( * )ISGN, double precisionEST, integerKASE, integer, dimension( 3 )ISAVE) DLACN2…
dlabrd.f – Synopsis Functions/Subroutines subroutine dlabrd (M, N, NB, A, LDA, D, E, TAUQ, TAUP, X, LDX, Y, LDY) DLABRD reduces the first nb rows and columns of a general matrix to a bidiagonal form. Function/Subroutine Documentation subroutine dlabrd (integerM, integerN, integerNB, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )D, double…
dlabad.f – Synopsis Functions/Subroutines subroutine dlabad (SMALL, LARGE) DLABAD Function/Subroutine Documentation subroutine dlabad (double precisionSMALL, double precisionLARGE) DLABAD Purpose: DLABAD takes as input the values computed by DLAMCH for underflow and overflow, and returns the square root of each of these values if the log of LARGE is sufficiently large. This subroutine is intended to…
dla_wwaddw.f – Synopsis Functions/Subroutines subroutine dla_wwaddw (N, X, Y, W) DLA_WWADDW adds a vector into a doubled-single vector. Function/Subroutine Documentation subroutine dla_wwaddw (integerN, double precision, dimension( * )X, double precision, dimension( * )Y, double precision, dimension( * )W) DLA_WWADDW adds a vector into a doubled-single vector. Purpose: DLA_WWADDW adds a vector W into a doubled-single…
dla_syrpvgrw.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dla_syrpvgrw (UPLO, N, INFO, A, LDA, AF, LDAF, IPIV, WORK) DLA_SYRPVGRW computes the reciprocal pivot growth factor norm(A)/norm(U) for a symmetric indefinite matrix. Function/Subroutine Documentation DOUBLE PRECISION function dla_syrpvgrw (character*1UPLO, integerN, integerINFO, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF, integer, dimension(…
dla_syrfsx_extended.f – Synopsis Functions/Subroutines subroutine dla_syrfsx_extended (PREC_TYPE, UPLO, N, NRHS, A, LDA, AF, LDAF, IPIV, COLEQU, C, B, LDB, Y, LDY, BERR_OUT, N_NORMS, ERR_BNDS_NORM, ERR_BNDS_COMP, RES, AYB, DY, Y_TAIL, RCOND, ITHRESH, RTHRESH, DZ_UB, IGNORE_CWISE, INFO) DLA_SYRFSX_EXTENDED improves the computed solution to a system of linear equations for symmetric indefinite matrices by performing extra-precise iterative refinement…
dla_syrcond.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dla_syrcond (UPLO, N, A, LDA, AF, LDAF, IPIV, CMODE, C, INFO, WORK, IWORK) DLA_SYRCOND estimates the Skeel condition number for a symmetric indefinite matrix. Function/Subroutine Documentation DOUBLE PRECISION function dla_syrcond (characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF, integer, dimension(…
dla_syamv.f – Synopsis Functions/Subroutines subroutine dla_syamv (UPLO, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) DLA_SYAMV computes a matrix-vector product using a symmetric indefinite matrix to calculate error bounds. Function/Subroutine Documentation subroutine dla_syamv (integerUPLO, integerN, double precisionALPHA, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )X, integerINCX, double precisionBETA, double precision,…
dla_porpvgrw.f – Synopsis Functions/Subroutines DOUBLE PRECISION function dla_porpvgrw (UPLO, NCOLS, A, LDA, AF, LDAF, WORK) DLA_PORPVGRW computes the reciprocal pivot growth factor norm(A)/norm(U) for a symmetric or Hermitian positive-definite matrix. Function/Subroutine Documentation DOUBLE PRECISION function dla_porpvgrw (character*1UPLO, integerNCOLS, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF, double precision, dimension(…
dla_porfsx_extended.f – Synopsis Functions/Subroutines subroutine dla_porfsx_extended (PREC_TYPE, UPLO, N, NRHS, A, LDA, AF, LDAF, COLEQU, C, B, LDB, Y, LDY, BERR_OUT, N_NORMS, ERR_BNDS_NORM, ERR_BNDS_COMP, RES, AYB, DY, Y_TAIL, RCOND, ITHRESH, RTHRESH, DZ_UB, IGNORE_CWISE, INFO) DLA_PORFSX_EXTENDED improves the computed solution to a system of linear equations for symmetric or Hermitian positive-definite matrices by performing extra-precise iterative…