 
      SUBROUTINE XDERR(A)
C***BEGIN PROLOGUE  XDERR
C***DATE WRITTEN   830124   (YYMMDD)
C***REVISION DATE  861209   (YYMMDD)
C***CATEGORY NO.  A3d
C***KEYWORDS  EXTENDED-RANGE DOUBLE-PRECISION ARITHMETIC
C***AUTHOR  LOZIER, DANIEL W. (NATIONAL BUREAU OF STANDARDS)
C           SMITH, JOHN M. (NBS AND GEORGE MASON UNIVERSITY)
C***PURPOSE  TO PROVIDE DOUBLE-PRECISION FLOATING-POINT ARITHMETIC
C            WITH AN EXTENDED EXPONENT RANGE
C***DESCRIPTION
C     CHARACTER*(*) A
C
C Extended-range double-precision arithmetic package. Print an
C error message and the contents of the common blocks, then stop.
C
C***REFERENCES  (PROGRAM LISTING FOR XDSET)
C***ROUTINES CALLED  XDPCOM, XERROR
C***COMMON BLOCKS    XDBLK1
C***END OF PROLOGUE  XDERR
 
 
