cs1s2.f
SUBROUTINE CS1S2 (ZR, S1, S2, NZ, ASCLE, ALIM, IUF)
C***BEGIN PROLOGUE CS1S2
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Warning: this routine is not intended to be user-callable.
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C***SUBSIDIARY
C***PURPOSE Subsidiary to CAIRY and CBESK
C***LIBRARY SLATEC
C***TYPE ALL (CS1S2-A, ZS1S2-A)
C***AUTHOR Amos, D. E., (SNL)
C***DESCRIPTION
C
C CS1S2 TESTS FOR A POSSIBLE UNDERFLOW RESULTING FROM THE
C ADDITION OF THE I AND K FUNCTIONS IN THE ANALYTIC CON-
C TINUATION FORMULA WHERE S1=K FUNCTION AND S2=I FUNCTION.
C ON KODE=1 THE I AND K FUNCTIONS ARE DIFFERENT ORDERS OF
C MAGNITUDE, BUT FOR KODE=2 THEY CAN BE OF THE SAME ORDER
C OF MAGNITUDE AND THE MAXIMUM MUST BE AT LEAST ONE
C PRECISION ABOVE THE UNDERFLOW LIMIT.
C
C***SEE ALSO CAIRY, CBESK
C***ROUTINES CALLED (NONE)
C***REVISION HISTORY (YYMMDD)
C 830501 DATE WRITTEN
C 910415 Prologue converted to Version 4.0 format. (BAB)
C***END PROLOGUE CS1S2