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NAME
     use_int_workspace - Provide a block of memory to be used  in
     LAPACK routines that have a integer workspace parameter that
     can vary in length and are called through the C interfaces.

SYNOPSIS
     #include <sunperf.h>

     int use_int_workspace(int *ws, int length) ;

PURPOSE
     Many LAPACK routines require workspace parameters to provide
               temporary  storage for intermediate results.  Some
               routines allow varying amounts of workspace to  be
               passed  in.   A  choice  is  made between multiple
               algorithms, using the most efficient method  which
               can  operate  given  the amount of workspace.  The
               following  lapack  routines  all  support  varying
               amounts of integer workspace:

               chbevd        cheevd         chpevd         cstedc
               dgeesx  dsbevd      dspevd      dstedc      dstevd
               dsyevd dtrsen      sgeesx      ssbevd       sspevd
               sstedc  sstevd      ssyevd      strsen      zhbevd
               zheevd zhpevd      zstedc

               The C LAPACK interfaces do not require the user to
               provide workspace.  Tempory storage is dynamically
               allocated as needed.  By default, the C interfaces
               use   the  minimum  amount  of  storage  required.
               Therefore, the computation for the routines listed
               above  will  use  the  algorithm that requires the
               least amount of workspace.  In  most  cases  these
               algorithms  require  more time.  A larger block of
               memory can be supplied with the  use_int_workspace
               function,  allowing more time-efficient algorithms
               to be selected.

ARGUMENTS
     workspace A pointer to the block of memory  to  be  used  as
               workspace.

     length    The length of the workspace array in bytes.

Партнёры:

Хостинг: