Section 3: library functions
dsecnd_EXT_ETIME_.f – SynopsisFunctions/SubroutinesDOUBLE PRECISION function dsecnd () DSECND Using ETIME_ Function/Subroutine DocumentationDOUBLE PRECISION function dsecnd ()DSECND Using ETIME_ Purpose: DSECND returns the user time for a process in seconds. This version gets the time from the system function ETIME_. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November…
dsecnd_EXT_ETIME_.f – SynopsisFunctions/SubroutinesDOUBLE PRECISION function dsecnd () DSECND Using ETIME_ Function/Subroutine DocumentationDOUBLE PRECISION function dsecnd ()DSECND Using ETIME_ Purpose: DSECND returns the user time for a process in seconds. This version gets the time from the system function ETIME_. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November…
dsecnd_EXT_ETIME.f – SynopsisFunctions/SubroutinesDOUBLE PRECISION function dsecnd () DSECND Using ETIME Function/Subroutine DocumentationDOUBLE PRECISION function dsecnd ()DSECND Using ETIME Purpose: DSECND returns the user time for a process in seconds. This version gets the time from the EXTERNAL system function ETIME. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date:…
dsecnd_EXT_ETIME.f – SynopsisFunctions/SubroutinesDOUBLE PRECISION function dsecnd () DSECND Using ETIME Function/Subroutine DocumentationDOUBLE PRECISION function dsecnd ()DSECND Using ETIME Purpose: DSECND returns the user time for a process in seconds. This version gets the time from the EXTERNAL system function ETIME. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date:…
dsdot.f – SynopsisFunctions/SubroutinesDOUBLE PRECISION function dsdot (N, SX, INCX, SY, INCY) DSDOT Function/Subroutine DocumentationDOUBLE PRECISION function dsdot (integerN, real, dimension(*)SX, integerINCX, real, dimension(*)SY, integerINCY)DSDOT Purpose: Compute the inner product of two vectors with extended precision accumulation and result. Returns D.P. dot product accumulated in D.P., for S.P. SX and SY DSDOT = sum for I…
dscal.f – SynopsisFunctions/Subroutinessubroutine dscal (N, DA, DX, INCX) DSCAL Function/Subroutine Documentationsubroutine dscal (integerN, double precisionDA, double precision, dimension(*)DX, integerINCX)DSCAL Purpose: DSCAL scales a vector by a constant. uses unrolled loops for increment equal to one. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November 2011 Further Details: jack…
dsbtrd.f – SynopsisFunctions/Subroutinessubroutine dsbtrd (VECT, UPLO, N, KD, AB, LDAB, D, E, Q, LDQ, WORK, INFO) DSBTRD Function/Subroutine Documentationsubroutine dsbtrd (characterVECT, characterUPLO, integerN, integerKD, double precision, dimension( ldab, * )AB, integerLDAB, double precision, dimension( * )D, double precision, dimension( * )E, double precision, dimension( ldq, * )Q, integerLDQ, double precision, dimension( * )WORK, integerINFO)DSBTRD Purpose:…
dsbmv.f – SynopsisFunctions/Subroutinessubroutine dsbmv (UPLO, N, K, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) DSBMV Function/Subroutine Documentationsubroutine dsbmv (characterUPLO, integerN, integerK, double precisionALPHA, double precision, dimension(lda,*)A, integerLDA, double precision, dimension(*)X, integerINCX, double precisionBETA, double precision, dimension(*)Y, integerINCY)DSBMV Purpose: DSBMV performs the matrix-vector operation y := alpha*A*x + beta*y, where alpha and beta are scalars,…
dsbgvx.f – SynopsisFunctions/Subroutinessubroutine dsbgvx (JOBZ, RANGE, UPLO, N, KA, KB, AB, LDAB, BB, LDBB, Q, LDQ, VL, VU, IL, IU, ABSTOL, M, W, Z, LDZ, WORK, IWORK, IFAIL, INFO) DSBGST Function/Subroutine Documentationsubroutine dsbgvx (characterJOBZ, characterRANGE, characterUPLO, integerN, integerKA, integerKB, double precision, dimension( ldab, * )AB, integerLDAB, double precision, dimension( ldbb, * )BB, integerLDBB, double precision,…
dsbgvd.f – SynopsisFunctions/Subroutinessubroutine dsbgvd (JOBZ, UPLO, N, KA, KB, AB, LDAB, BB, LDBB, W, Z, LDZ, WORK, LWORK, IWORK, LIWORK, INFO) DSBGST Function/Subroutine Documentationsubroutine dsbgvd (characterJOBZ, characterUPLO, integerN, integerKA, integerKB, double precision, dimension( ldab, * )AB, integerLDAB, double precision, dimension( ldbb, * )BB, integerLDBB, double precision, dimension( * )W, double precision, dimension( ldz, * )Z,…
dsbgv.f – SynopsisFunctions/Subroutinessubroutine dsbgv (JOBZ, UPLO, N, KA, KB, AB, LDAB, BB, LDBB, W, Z, LDZ, WORK, INFO) DSBGST Function/Subroutine Documentationsubroutine dsbgv (characterJOBZ, characterUPLO, integerN, integerKA, integerKB, double precision, dimension( ldab, * )AB, integerLDAB, double precision, dimension( ldbb, * )BB, integerLDBB, double precision, dimension( * )W, double precision, dimension( ldz, * )Z, integerLDZ, double precision,…
dsbgst.f – SynopsisFunctions/Subroutinessubroutine dsbgst (VECT, UPLO, N, KA, KB, AB, LDAB, BB, LDBB, X, LDX, WORK, INFO) DSBGST Function/Subroutine Documentationsubroutine dsbgst (characterVECT, characterUPLO, integerN, integerKA, integerKB, double precision, dimension( ldab, * )AB, integerLDAB, double precision, dimension( ldbb, * )BB, integerLDBB, double precision, dimension( ldx, * )X, integerLDX, double precision, dimension( * )WORK, integerINFO)DSBGST Purpose: DSBGST…
dsbevx.f – SynopsisFunctions/Subroutinessubroutine dsbevx (JOBZ, RANGE, UPLO, N, KD, AB, LDAB, Q, LDQ, VL, VU, IL, IU, ABSTOL, M, W, Z, LDZ, WORK, IWORK, IFAIL, INFO) DSBEVX computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices Function/Subroutine Documentationsubroutine dsbevx (characterJOBZ, characterRANGE, characterUPLO, integerN, integerKD, double precision, dimension( ldab, * )AB, integerLDAB,…
dsbevd.f – SynopsisFunctions/Subroutinessubroutine dsbevd (JOBZ, UPLO, N, KD, AB, LDAB, W, Z, LDZ, WORK, LWORK, IWORK, LIWORK, INFO) DSBEVD computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices Function/Subroutine Documentationsubroutine dsbevd (characterJOBZ, characterUPLO, integerN, integerKD, double precision, dimension( ldab, * )AB, integerLDAB, double precision, dimension( * )W, double precision, dimension( ldz,…
dsbev.f – SynopsisFunctions/Subroutinessubroutine dsbev (JOBZ, UPLO, N, KD, AB, LDAB, W, Z, LDZ, WORK, INFO) DSBEV computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices Function/Subroutine Documentationsubroutine dsbev (characterJOBZ, characterUPLO, integerN, integerKD, double precision, dimension( ldab, * )AB, integerLDAB, double precision, dimension( * )W, double precision, dimension( ldz, * )Z, integerLDZ,…
drscl.f – SynopsisFunctions/Subroutinessubroutine drscl (N, SA, SX, INCX) DRSCL multiplies a vector by the reciprocal of a real scalar. Function/Subroutine Documentationsubroutine drscl (integerN, double precisionSA, double precision, dimension( * )SX, integerINCX)DRSCL multiplies a vector by the reciprocal of a real scalar. Purpose: DRSCL multiplies an n-element real vector x by the real scalar 1/a. This…
drotmg.f – SynopsisFunctions/Subroutinessubroutine drotmg (DD1, DD2, DX1, DY1, DPARAM) DROTMG Function/Subroutine Documentationsubroutine drotmg (double precisionDD1, double precisionDD2, double precisionDX1, double precisionDY1, double precision, dimension(5)DPARAM)DROTMG Purpose: CONSTRUCT THE MODIFIED GIVENS TRANSFORMATION MATRIX H WHICH ZEROS THE SECOND COMPONENT OF THE 2-VECTOR (DSQRT(DD1)*DX1,DSQRT(DD2)*> DY2)**T. WITH DPARAM(1)=DFLAG, H HAS ONE OF THE FOLLOWING FORMS.. DFLAG=-1.D0 DFLAG=0.D0 DFLAG=1.D0 DFLAG=-2.D0…
drotm.f – SynopsisFunctions/Subroutinessubroutine drotm (N, DX, INCX, DY, INCY, DPARAM) DROTM Function/Subroutine Documentationsubroutine drotm (integerN, double precision, dimension(*)DX, integerINCX, double precision, dimension(*)DY, integerINCY, double precision, dimension(5)DPARAM)DROTM Purpose: APPLY THE MODIFIED GIVENS TRANSFORMATION, H, TO THE 2 BY N MATRIX (DX**T) , WHERE **T INDICATES TRANSPOSE. THE ELEMENTS OF DX ARE IN (DY**T) DX(LX+I*INCX), I =…
drotg.f – SynopsisFunctions/Subroutinessubroutine drotg (DA, DB, C, S) DROTG Function/Subroutine Documentationsubroutine drotg (double precisionDA, double precisionDB, double precisionC, double precisionS)DROTG Purpose: DROTG construct givens plane rotation. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November 2011 Further Details: jack dongarra, linpack, 3/11/78. Definition at line 47 of file…
drot.f – SynopsisFunctions/Subroutinessubroutine drot (N, DX, INCX, DY, INCY, C, S) DROT Function/Subroutine Documentationsubroutine drot (integerN, double precision, dimension(*)DX, integerINCX, double precision, dimension(*)DY, integerINCY, double precisionC, double precisionS)DROT Purpose: DROT applies a plane rotation. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November 2011 Further Details: jack dongarra,…