Section 3: library functions
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.DescriptionThe function dladdr() determines whether the address specified in addr is located in one of the shared objects loaded by the calling application. If it is, then…
dlacpy.f – SynopsisFunctions/Subroutinessubroutine dlacpy (UPLO, M, N, A, LDA, B, LDB) DLACPY copies all or part of one two-dimensional array to another. Function/Subroutine Documentationsubroutine 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 another. Purpose: DLACPY copies…
dlacon.f – SynopsisFunctions/Subroutinessubroutine 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 Documentationsubroutine dlacon (integerN, double precision, dimension( * )V, double precision, dimension( * )X, integer, dimension( * )ISGN, double precisionEST, integerKASE)DLACON estimates the 1-norm of a square matrix, using reverse…
dlacn2.f – SynopsisFunctions/Subroutinessubroutine 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 Documentationsubroutine dlacn2 (integerN, double precision, dimension( * )V, double precision, dimension( * )X, integer, dimension( * )ISGN, double precisionEST, integerKASE, integer, dimension( 3 )ISAVE)DLACN2 estimates the 1-norm of…
dlabrd.f – SynopsisFunctions/Subroutinessubroutine 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 Documentationsubroutine dlabrd (integerM, integerN, integerNB, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )D, double precision, dimension( *…
dlabad.f – SynopsisFunctions/Subroutinessubroutine dlabad (SMALL, LARGE) DLABAD Function/Subroutine Documentationsubroutine 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 identify machines with a…
dla_wwaddw.f – SynopsisFunctions/Subroutinessubroutine dla_wwaddw (N, X, Y, W) DLA_WWADDW adds a vector into a doubled-single vector. Function/Subroutine Documentationsubroutine 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 vector (X, Y). This…
dla_syrpvgrw.f – SynopsisFunctions/SubroutinesDOUBLE 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 DocumentationDOUBLE PRECISION function dla_syrpvgrw (character*1UPLO, integerN, integerINFO, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF, integer, dimension( * )IPIV, double…
dla_syrfsx_extended.f – SynopsisFunctions/Subroutinessubroutine 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 and provides…
dla_syrcond.f – SynopsisFunctions/SubroutinesDOUBLE 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 DocumentationDOUBLE PRECISION function dla_syrcond (characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF, integer, dimension( * )IPIV, integerCMODE,…
dla_syamv.f – SynopsisFunctions/Subroutinessubroutine 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 Documentationsubroutine dla_syamv (integerUPLO, integerN, double precisionALPHA, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )X, integerINCX, double precisionBETA, double precision, dimension( * )Y,…
dla_porpvgrw.f – SynopsisFunctions/SubroutinesDOUBLE 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 DocumentationDOUBLE PRECISION function dla_porpvgrw (character*1UPLO, integerNCOLS, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF, double precision, dimension( * )WORK)DLA_PORPVGRW computes…
dla_porfsx_extended.f – SynopsisFunctions/Subroutinessubroutine 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 refinement and…
dla_porcond.f – SynopsisFunctions/SubroutinesDOUBLE PRECISION function dla_porcond (UPLO, N, A, LDA, AF, LDAF, CMODE, C, INFO, WORK, IWORK) DLA_PORCOND estimates the Skeel condition number for a symmetric positive-definite matrix. Function/Subroutine DocumentationDOUBLE PRECISION function dla_porcond (characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF, integerCMODE, double precision, dimension( * )C,…
dla_lin_berr.f – SynopsisFunctions/Subroutinessubroutine dla_lin_berr (N, NZ, NRHS, RES, AYB, BERR) DLA_LIN_BERR computes a component-wise relative backward error. Function/Subroutine Documentationsubroutine dla_lin_berr (integerN, integerNZ, integerNRHS, double precision, dimension( n, nrhs )RES, double precision, dimension( n, nrhs )AYB, double precision, dimension( nrhs )BERR)DLA_LIN_BERR computes a component-wise relative backward error. Purpose: DLA_LIN_BERR computes component-wise relative backward error from the…
dla_gerpvgrw.f – SynopsisFunctions/SubroutinesDOUBLE PRECISION function dla_gerpvgrw (N, NCOLS, A, LDA, AF, LDAF) DLA_GERPVGRW Function/Subroutine DocumentationDOUBLE PRECISION function dla_gerpvgrw (integerN, integerNCOLS, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF)DLA_GERPVGRW Purpose: DLA_GERPVGRW computes the reciprocal pivot growth factor norm(A)/norm(U). The "max absolute element" norm is used. If this is much less…
dla_gerfsx_extended.f – SynopsisFunctions/Subroutinessubroutine dla_gerfsx_extended (PREC_TYPE, TRANS_TYPE, N, NRHS, A, LDA, AF, LDAF, IPIV, COLEQU, C, B, LDB, Y, LDY, BERR_OUT, N_NORMS, ERRS_N, ERRS_C, RES, AYB, DY, Y_TAIL, RCOND, ITHRESH, RTHRESH, DZ_UB, IGNORE_CWISE, INFO) DLA_GERFSX_EXTENDED improves the computed solution to a system of linear equations for general matrices by performing extra-precise iterative refinement and provides error…
dla_gercond.f – SynopsisFunctions/SubroutinesDOUBLE PRECISION function dla_gercond (TRANS, N, A, LDA, AF, LDAF, IPIV, CMODE, C, INFO, WORK, IWORK) DLA_GERCOND estimates the Skeel condition number for a general matrix. Function/Subroutine DocumentationDOUBLE PRECISION function dla_gercond (characterTRANS, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF, integer, dimension( * )IPIV, integerCMODE, double…
dla_geamv.f – SynopsisFunctions/Subroutinessubroutine dla_geamv (TRANS, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) DLA_GEAMV computes a matrix-vector product using a general matrix to calculate error bounds. Function/Subroutine Documentationsubroutine dla_geamv (integerTRANS, integerM, integerN, double precisionALPHA, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )X, integerINCX, double precisionBETA, double precision, dimension( *…
dla_gbrpvgrw.f – SynopsisFunctions/SubroutinesDOUBLE PRECISION function dla_gbrpvgrw (N, KL, KU, NCOLS, AB, LDAB, AFB, LDAFB) DLA_GBRPVGRW computes the reciprocal pivot growth factor norm(A)/norm(U) for a general banded matrix. Function/Subroutine DocumentationDOUBLE PRECISION function dla_gbrpvgrw (integerN, integerKL, integerKU, integerNCOLS, double precision, dimension( ldab, * )AB, integerLDAB, double precision, dimension( ldafb, * )AFB, integerLDAFB)DLA_GBRPVGRW computes the reciprocal pivot growth…