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Auxiliary BLAS(3) LAPACK Auxiliary BLAS(3)

NAME

Auxiliary BLAS -

Functions


integer function icamax (N, CX, INCX)
 
ICAMAX integer function idamax (N, DX, INCX)
 
IDAMAX integer function isamax (N, SX, INCX)
 
ISAMAX integer function izamax (N, ZX, INCX)
 
IZAMAX logical function lsame (CA, CB)
 
LSAME subroutine xerbla (SRNAME, INFO)
 
XERBLA subroutine xerbla_array (SRNAME_ARRAY, SRNAME_LEN, INFO)
 
XERBLA_ARRAY

Detailed Description

This is the group of Auxiliary 3 BLAS routines.

Function Documentation

integer function icamax (integerN, complex, dimension(*)CX, integerINCX)

ICAMAX
Purpose: 
    ICAMAX finds the index of the first element having maximum |Re(.)| + |Im(.)|
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
December 2016
Further Details: 
     jack dongarra, linpack, 3/11/78.
     modified 3/93 to return if incx .le. 0.
     modified 12/3/93, array(1) declarations changed to array(*)

integer function idamax (integerN, double precision, dimension(*)DX, integerINCX)

IDAMAX
Purpose: 
    IDAMAX finds the index of the first element having maximum absolute value.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
December 2016
Further Details: 
     jack dongarra, linpack, 3/11/78.
     modified 3/93 to return if incx .le. 0.
     modified 12/3/93, array(1) declarations changed to array(*)

integer function isamax (integerN, real, dimension(*)SX, integerINCX)

ISAMAX
Purpose: 
    ISAMAX finds the index of the first element having maximum absolute value.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
December 2016
Further Details: 
     jack dongarra, linpack, 3/11/78.
     modified 3/93 to return if incx .le. 0.
     modified 12/3/93, array(1) declarations changed to array(*)

integer function izamax (integerN, complex*16, dimension(*)ZX, integerINCX)

IZAMAX
Purpose: 
    IZAMAX finds the index of the first element having maximum |Re(.)| + |Im(.)|
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
December 2016
Further Details: 
     jack dongarra, 1/15/85.
     modified 3/93 to return if incx .le. 0.
     modified 12/3/93, array(1) declarations changed to array(*)

logical function lsame (characterCA, characterCB)

LSAME
Purpose: 
 LSAME returns .TRUE. if CA is the same letter as CB regardless of
 case.
Parameters:
CA 
          CA is CHARACTER*1
CB 
          CB is CHARACTER*1
          CA and CB specify the single characters to be compared.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
December 2016

subroutine xerbla (character*(*)SRNAME, integerINFO)

XERBLA
Purpose: 
 XERBLA  is an error handler for the LAPACK routines.
 It is called by an LAPACK routine if an input parameter has an
 invalid value.  A message is printed and execution stops.


 Installers may consider modifying the STOP statement in order to
 call system-specific exception-handling facilities.
Parameters:
SRNAME 
          SRNAME is CHARACTER*(*)
          The name of the routine which called XERBLA.
INFO 
          INFO is INTEGER
          The position of the invalid parameter in the parameter list
          of the calling routine.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
December 2016

subroutine xerbla_array (character(1), dimension(srname_len)SRNAME_ARRAY, integerSRNAME_LEN, integerINFO)

XERBLA_ARRAY
Purpose: 
 XERBLA_ARRAY assists other languages in calling XERBLA, the LAPACK
 and BLAS error handler.  Rather than taking a Fortran string argument
 as the function's name, XERBLA_ARRAY takes an array of single
 characters along with the array's length.  XERBLA_ARRAY then copies
 up to 32 characters of that array into a Fortran string and passes
 that to XERBLA.  If called with a non-positive SRNAME_LEN,
 XERBLA_ARRAY will call XERBLA with a string of all blank characters.


 Say some macro or other device makes XERBLA_ARRAY available to C99
 by a name lapack_xerbla and with a common Fortran calling convention.
 Then a C99 program could invoke XERBLA via:
    {
      int flen = strlen(__func__);
      lapack_xerbla(__func__, &flen, &info);
    }


 Providing XERBLA_ARRAY is not necessary for intercepting LAPACK
 errors.  XERBLA_ARRAY calls XERBLA.
Parameters:
SRNAME_ARRAY 
          SRNAME_ARRAY is CHARACTER(1) array, dimension (SRNAME_LEN)
          The name of the routine which called XERBLA_ARRAY.
SRNAME_LEN 
          SRNAME_LEN is INTEGER
          The length of the name in SRNAME_ARRAY.
INFO 
          INFO is INTEGER
          The position of the invalid parameter in the parameter list
          of the calling routine.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
December 2016

Author

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