drscl(3S)

NAME
     DRSCL - multiplie an n-element real vector x by the real scalar 1/a

SYNOPSIS
     SUBROUTINE DRSCL( N, SA, SX, INCX )

         INTEGER       INCX, N

         DOUBLE        PRECISION SA

         DOUBLE        PRECISION SX( * )

IMPLEMENTATION
     These routines are part of the SCSL Scientific Library and can be loaded
     using either the -lscs or the -lscs_mp option.  The -lscs_mp option
     directs the linker to use the multi-processor version of the library.

     When linking to SCSL with -lscs or -lscs_mp, the default integer size is
     4 bytes (32 bits). Another version of SCSL is available in which integers
     are 8 bytes (64 bits).  This version allows the user access to larger
     memory sizes and helps when porting legacy Cray codes.  It can be loaded
     by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
     only one of the two versions; 4-byte integer and 8-byte integer library
     calls cannot be mixed.

PURPOSE
     DRSCL multiplies an n-element real vector x by the real scalar 1/a. This
     is done without overflow or underflow as long as
     the final result x/a does not overflow or underflow.


ARGUMENTS
     N       (input) INTEGER
             The number of components of the vector x.

     SA      (input) DOUBLE PRECISION
             The scalar a which is used to divide each component of x.  SA
             must be >= 0, or the subroutine will divide by zero.

     SX      (input/output) DOUBLE PRECISION array, dimension
             (1+(N-1)*abs(INCX)) The n-element vector x.

     INCX    (input) INTEGER
             The increment between successive values of the vector SX.  > 0:
             SX(1) = X(1) and SX(1+(i-1)*INCX) = x(i),     1< i<= n

SEE ALSO
     INTRO_LAPACK(3S), INTRO_SCSL(3S)

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