SLATEC Routines --- D9B1MP ---

*DECK D9B1MP
      SUBROUTINE D9B1MP (X, AMPL, THETA)
C***BEGIN PROLOGUE  D9B1MP
C***SUBSIDIARY
C***PURPOSE  Evaluate the modulus and phase for the J1 and Y1 Bessel
C            functions.
C***LIBRARY   SLATEC (FNLIB)
C***CATEGORY  C10A1
C***TYPE      DOUBLE PRECISION (D9B1MP-D)
C***KEYWORDS  BESSEL FUNCTION, FNLIB, MODULUS, PHASE, SPECIAL FUNCTIONS
C***AUTHOR  Fullerton, W., (LANL)
C***DESCRIPTION
C
C Evaluate the modulus and phase for the Bessel J1 and Y1 functions.
C
C Series for BM1        on the interval  1.56250E-02 to  6.25000E-02
C                                        with weighted error   4.91E-32
C                                         log weighted error  31.31
C                               significant figures required  30.04
C                                    decimal places required  32.09
C
C Series for BT12       on the interval  1.56250E-02 to  6.25000E-02
C                                        with weighted error   3.33E-32
C                                         log weighted error  31.48
C                               significant figures required  31.05
C                                    decimal places required  32.27
C
C Series for BM12       on the interval  0.          to  1.56250E-02
C                                        with weighted error   5.01E-32
C                                         log weighted error  31.30
C                               significant figures required  29.99
C                                    decimal places required  32.10
C
C Series for BTH1       on the interval  0.          to  1.56250E-02
C                                        with weighted error   2.82E-32
C                                         log weighted error  31.55
C                               significant figures required  31.12
C                                    decimal places required  32.37
C
C***SEE ALSO  DBESJ1, DBESY1
C***REFERENCES  (NONE)
C***ROUTINES CALLED  D1MACH, DCSEVL, INITDS, XERMSG
C***REVISION HISTORY  (YYMMDD)
C   770701  DATE WRITTEN
C   890531  Changed all specific intrinsics to generic.  (WRB)
C   890531  REVISION DATE from Version 3.2
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900315  CALLs to XERROR changed to CALLs to XERMSG.  (THJ)
C   900720  Routine changed from user-callable to subsidiary.  (WRB)
C   920618  Removed space from variable name and code restructured to
C           use IF-THEN-ELSE.  (RWC, WRB)
C***END PROLOGUE  D9B1MP