!DECK D1MACH
      DOUBLE PRECISION FUNCTION D1MACH (I)
!***BEGIN PROLOGUE  D1MACH
!***PURPOSE  Return floating point machine dependent constants.
!***LIBRARY   SLATEC
!***CATEGORY  R1
!***TYPE      DOUBLE PRECISION (R1MACH-S, D1MACH-D)
!***KEYWORDS  MACHINE CONSTANTS
!***AUTHOR  Fox, P. A., (Bell Labs)
!           Hall, A. D., (Bell Labs)
!           Schryer, N. L., (Bell Labs)
!***DESCRIPTION
!
!   D1MACH can be used to obtain machine-dependent parameters for the
!   local machine environment.  It is a function subprogram with one
!   (input) argument, and can be referenced as follows:
!
!        D = D1MACH(I)
!
!   where I=1,...,5.  The (output) value of D above is determined by
!   the (input) value of I.  The results for various values of I are
!   discussed below.
!
!   D1MACH( 1) = B**(EMIN-1), the smallest positive magnitude.
!   D1MACH( 2) = B**EMAX*(1 - B**(-T)), the largest magnitude.
!   D1MACH( 3) = B**(-T), the smallest relative spacing.
!   D1MACH( 4) = B**(1-T), the largest relative spacing.
!   D1MACH( 5) = LOG10(B)
!
!   Assume double precision numbers are represented in the T-digit,
!   base-B form
!
!              sign (B**E)*( (X(1)/B) + ... + (X(T)/B**T) )
!
!   where 0 .LE. X(I) .LT. B for I=1,...,T, 0 .LT. X(1), and
!   EMIN .LE. E .LE. EMAX.
!
!   The values of B, T, EMIN and EMAX are provided in I1MACH as
!   follows:
!   I1MACH(10) = B, the base.
!   I1MACH(14) = T, the number of base-B digits.
!   I1MACH(15) = EMIN, the smallest exponent E.
!   I1MACH(16) = EMAX, the largest exponent E.
!
!   To alter this function for a particular environment, the desired
!   set of DATA statements should be activated by removing the C from
!   column 1.  Also, the values of D1MACH(1) - D1MACH(4) should be
!   checked for consistency with the local operating system.
!
!***REFERENCES  P. A. Fox, A. D. Hall and N. L. Schryer, Framework for
!                 a portable library, ACM Transactions on Mathematical
!                 Software 4, 2 (June 1978), pp. 177-188.
!***ROUTINES CALLED  XERMSG
!***REVISION HISTORY  (YYMMDD)
!   750101  DATE WRITTEN
!   890213  REVISION DATE from Version 3.2
!   891214  Prologue converted to Version 4.0 format.  (BAB)
!   900315  CALLs to XERROR changed to CALLs to XERMSG.  (THJ)
!   900618  Added DEC RISC constants.  (WRB)
!   900723  Added IBM RS 6000 constants.  (WRB)
!   900911  Added SUN 386i constants.  (WRB)
!   910710  Added HP 730 constants.  (SMR)
!   911114  Added Convex IEEE constants.  (WRB)
!   920121  Added SUN -r8 compiler option constants.  (WRB)
!   920229  Added Touchstone Delta i860 constants.  (WRB)
!   920501  Reformatted the REFERENCES section.  (WRB)
!   920625  Added CONVEX -p8 and -pd8 compiler option constants.
!           (BKS, WRB)
!   930201  Added DEC Alpha and SGI constants.  (RWC and WRB)
!***END PROLOGUE  D1MACH
!
      INTEGER SMALL(4)
      INTEGER LARGE(4)
      INTEGER RIGHT(4)
      INTEGER DIVER(4)
      INTEGER LOG10(4)
!
      DOUBLE PRECISION DMACH(5)
      SAVE DMACH
!
      EQUIVALENCE (DMACH(1),SMALL(1))
      EQUIVALENCE (DMACH(2),LARGE(1))
      EQUIVALENCE (DMACH(3),RIGHT(1))
      EQUIVALENCE (DMACH(4),DIVER(1))
      EQUIVALENCE (DMACH(5),LOG10(1))
!
!     MACHINE CONSTANTS FOR THE AMIGA
!     ABSOFT FORTRAN COMPILER USING THE 68020/68881 COMPILER OPTION
!
!     DATA SMALL(1), SMALL(2) / Z'00100000', Z'00000000' /
!     DATA LARGE(1), LARGE(2) / Z'7FEFFFFF', Z'FFFFFFFF' /
!     DATA RIGHT(1), RIGHT(2) / Z'3CA00000', Z'00000000' /
!     DATA DIVER(1), DIVER(2) / Z'3CB00000', Z'00000000' /
!     DATA LOG10(1), LOG10(2) / Z'3FD34413', Z'509F79FF' /
!
!     MACHINE CONSTANTS FOR THE AMIGA
!     ABSOFT FORTRAN COMPILER USING SOFTWARE FLOATING POINT
!
!     DATA SMALL(1), SMALL(2) / Z'00100000', Z'00000000' /
!     DATA LARGE(1), LARGE(2) / Z'7FDFFFFF', Z'FFFFFFFF' /
!     DATA RIGHT(1), RIGHT(2) / Z'3CA00000', Z'00000000' /
!     DATA DIVER(1), DIVER(2) / Z'3CB00000', Z'00000000' /
!     DATA LOG10(1), LOG10(2) / Z'3FD34413', Z'509F79FF' /
!
!     MACHINE CONSTANTS FOR THE APOLLO
!
!     DATA SMALL(1), SMALL(2) / 16#00100000, 16#00000000 /
!     DATA LARGE(1), LARGE(2) / 16#7FFFFFFF, 16#FFFFFFFF /
!     DATA RIGHT(1), RIGHT(2) / 16#3CA00000, 16#00000000 /
!     DATA DIVER(1), DIVER(2) / 16#3CB00000, 16#00000000 /
!     DATA LOG10(1), LOG10(2) / 16#3FD34413, 16#509F79FF /
!
!     MACHINE CONSTANTS FOR THE BURROUGHS 1700 SYSTEM
!
!     DATA SMALL(1) / ZC00800000 /
!     DATA SMALL(2) / Z000000000 /
!     DATA LARGE(1) / ZDFFFFFFFF /
!     DATA LARGE(2) / ZFFFFFFFFF /
!     DATA RIGHT(1) / ZCC5800000 /
!     DATA RIGHT(2) / Z000000000 /
!     DATA DIVER(1) / ZCC6800000 /
!     DATA DIVER(2) / Z000000000 /
!     DATA LOG10(1) / ZD00E730E7 /
!     DATA LOG10(2) / ZC77800DC0 /
!
!     MACHINE CONSTANTS FOR THE BURROUGHS 5700 SYSTEM
!
!     DATA SMALL(1) / O1771000000000000 /
!     DATA SMALL(2) / O0000000000000000 /
!     DATA LARGE(1) / O0777777777777777 /
!     DATA LARGE(2) / O0007777777777777 /
!     DATA RIGHT(1) / O1461000000000000 /
!     DATA RIGHT(2) / O0000000000000000 /
!     DATA DIVER(1) / O1451000000000000 /
!     DATA DIVER(2) / O0000000000000000 /
!     DATA LOG10(1) / O1157163034761674 /
!     DATA LOG10(2) / O0006677466732724 /
!
!     MACHINE CONSTANTS FOR THE BURROUGHS 6700/7700 SYSTEMS
!
!     DATA SMALL(1) / O1771000000000000 /
!     DATA SMALL(2) / O7770000000000000 /
!     DATA LARGE(1) / O0777777777777777 /
!     DATA LARGE(2) / O7777777777777777 /
!     DATA RIGHT(1) / O1461000000000000 /
!     DATA RIGHT(2) / O0000000000000000 /
!     DATA DIVER(1) / O1451000000000000 /
!     DATA DIVER(2) / O0000000000000000 /
!     DATA LOG10(1) / O1157163034761674 /
!     DATA LOG10(2) / O0006677466732724 /
!
!     MACHINE CONSTANTS FOR THE CDC 170/180 SERIES USING NOS/VE
!
!     DATA SMALL(1) / Z"3001800000000000" /
!     DATA SMALL(2) / Z"3001000000000000" /
!     DATA LARGE(1) / Z"4FFEFFFFFFFFFFFE" /
!     DATA LARGE(2) / Z"4FFE000000000000" /
!     DATA RIGHT(1) / Z"3FD2800000000000" /
!     DATA RIGHT(2) / Z"3FD2000000000000" /
!     DATA DIVER(1) / Z"3FD3800000000000" /
!     DATA DIVER(2) / Z"3FD3000000000000" /
!     DATA LOG10(1) / Z"3FFF9A209A84FBCF" /
!     DATA LOG10(2) / Z"3FFFF7988F8959AC" /
!
!     MACHINE CONSTANTS FOR THE CDC 6000/7000 SERIES
!
!     DATA SMALL(1) / 00564000000000000000B /
!     DATA SMALL(2) / 00000000000000000000B /
!     DATA LARGE(1) / 37757777777777777777B /
!     DATA LARGE(2) / 37157777777777777777B /
!     DATA RIGHT(1) / 15624000000000000000B /
!     DATA RIGHT(2) / 00000000000000000000B /
!     DATA DIVER(1) / 15634000000000000000B /
!     DATA DIVER(2) / 00000000000000000000B /
!     DATA LOG10(1) / 17164642023241175717B /
!     DATA LOG10(2) / 16367571421742254654B /
!
!     MACHINE CONSTANTS FOR THE CELERITY C1260
!
!     DATA SMALL(1), SMALL(2) / Z'00100000', Z'00000000' /
!     DATA LARGE(1), LARGE(2) / Z'7FEFFFFF', Z'FFFFFFFF' /
!     DATA RIGHT(1), RIGHT(2) / Z'3CA00000', Z'00000000' /
!     DATA DIVER(1), DIVER(2) / Z'3CB00000', Z'00000000' /
!     DATA LOG10(1), LOG10(2) / Z'3FD34413', Z'509F79FF' /
!
!     MACHINE CONSTANTS FOR THE CONVEX
!     USING THE -fn OR -pd8 COMPILER OPTION
!
!     DATA DMACH(1) / Z'0010000000000000' /
!     DATA DMACH(2) / Z'7FFFFFFFFFFFFFFF' /
!     DATA DMACH(3) / Z'3CC0000000000000' /
!     DATA DMACH(4) / Z'3CD0000000000000' /
!     DATA DMACH(5) / Z'3FF34413509F79FF' /
!
!     MACHINE CONSTANTS FOR THE CONVEX
!     USING THE -fi COMPILER OPTION
!
!     DATA DMACH(1) / Z'0010000000000000' /
!     DATA DMACH(2) / Z'7FEFFFFFFFFFFFFF' /
!     DATA DMACH(3) / Z'3CA0000000000000' /
!     DATA DMACH(4) / Z'3CB0000000000000' /
!     DATA DMACH(5) / Z'3FD34413509F79FF' /
!
!     MACHINE CONSTANTS FOR THE CONVEX
!     USING THE -p8 COMPILER OPTION
!
!     DATA DMACH(1) / Z'00010000000000000000000000000000' /
!     DATA DMACH(2) / Z'7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF' /
!     DATA DMACH(3) / Z'3F900000000000000000000000000000' /
!     DATA DMACH(4) / Z'3F910000000000000000000000000000' /
!     DATA DMACH(5) / Z'3FFF34413509F79FEF311F12B35816F9' /
!
!     MACHINE CONSTANTS FOR THE CRAY
!
!     DATA SMALL(1) / 201354000000000000000B /
!     DATA SMALL(2) / 000000000000000000000B /
!     DATA LARGE(1) / 577767777777777777777B /
!     DATA LARGE(2) / 000007777777777777774B /
!     DATA RIGHT(1) / 376434000000000000000B /
!     DATA RIGHT(2) / 000000000000000000000B /
!     DATA DIVER(1) / 376444000000000000000B /
!     DATA DIVER(2) / 000000000000000000000B /
!     DATA LOG10(1) / 377774642023241175717B /
!     DATA LOG10(2) / 000007571421742254654B /
!
!     MACHINE CONSTANTS FOR THE DATA GENERAL ECLIPSE S/200
!     NOTE - IT MAY BE APPROPRIATE TO INCLUDE THE FOLLOWING CARD -
!     STATIC DMACH(5)
!
!     DATA SMALL /    20K, 3*0 /
!     DATA LARGE / 77777K, 3*177777K /
!     DATA RIGHT / 31420K, 3*0 /
!     DATA DIVER / 32020K, 3*0 /
!     DATA LOG10 / 40423K, 42023K, 50237K, 74776K /
!
!     MACHINE CONSTANTS FOR THE DEC ALPHA
!     USING G_FLOAT
!
!     DATA DMACH(1) / '0000000000000010'X /
!     DATA DMACH(2) / 'FFFFFFFFFFFF7FFF'X /
!     DATA DMACH(3) / '0000000000003CC0'X /
!     DATA DMACH(4) / '0000000000003CD0'X /
!     DATA DMACH(5) / '79FF509F44133FF3'X /
!
!     MACHINE CONSTANTS FOR THE DEC ALPHA
!     USING IEEE_FORMAT
!
!     DATA DMACH(1) / '0010000000000000'X /
!     DATA DMACH(2) / '7FEFFFFFFFFFFFFF'X /
!     DATA DMACH(3) / '3CA0000000000000'X /
!     DATA DMACH(4) / '3CB0000000000000'X /
!     DATA DMACH(5) / '3FD34413509F79FF'X /
!
!     MACHINE CONSTANTS FOR THE DEC RISC
!
!     DATA SMALL(1), SMALL(2) / Z'00000000', Z'00100000'/
!     DATA LARGE(1), LARGE(2) / Z'FFFFFFFF', Z'7FEFFFFF'/
!     DATA RIGHT(1), RIGHT(2) / Z'00000000', Z'3CA00000'/
!     DATA DIVER(1), DIVER(2) / Z'00000000', Z'3CB00000'/
!     DATA LOG10(1), LOG10(2) / Z'509F79FF', Z'3FD34413'/
!
!     MACHINE CONSTANTS FOR THE DEC VAX
!     USING D_FLOATING
!     (EXPRESSED IN INTEGER AND HEXADECIMAL)
!     THE HEX FORMAT BELOW MAY NOT BE SUITABLE FOR UNIX SYSTEMS
!     THE INTEGER FORMAT SHOULD BE OK FOR UNIX SYSTEMS
!
!     DATA SMALL(1), SMALL(2) /        128,           0 /
!     DATA LARGE(1), LARGE(2) /     -32769,          -1 /
!     DATA RIGHT(1), RIGHT(2) /       9344,           0 /
!     DATA DIVER(1), DIVER(2) /       9472,           0 /
!     DATA LOG10(1), LOG10(2) /  546979738,  -805796613 /
!
!     DATA SMALL(1), SMALL(2) / Z00000080, Z00000000 /
!     DATA LARGE(1), LARGE(2) / ZFFFF7FFF, ZFFFFFFFF /
!     DATA RIGHT(1), RIGHT(2) / Z00002480, Z00000000 /
!     DATA DIVER(1), DIVER(2) / Z00002500, Z00000000 /
!     DATA LOG10(1), LOG10(2) / Z209A3F9A, ZCFF884FB /
!
!     MACHINE CONSTANTS FOR THE DEC VAX
!     USING G_FLOATING
!     (EXPRESSED IN INTEGER AND HEXADECIMAL)
!     THE HEX FORMAT BELOW MAY NOT BE SUITABLE FOR UNIX SYSTEMS
!     THE INTEGER FORMAT SHOULD BE OK FOR UNIX SYSTEMS
!
!     DATA SMALL(1), SMALL(2) /         16,           0 /
!     DATA LARGE(1), LARGE(2) /     -32769,          -1 /
!     DATA RIGHT(1), RIGHT(2) /      15552,           0 /
!     DATA DIVER(1), DIVER(2) /      15568,           0 /
!     DATA LOG10(1), LOG10(2) /  1142112243, 2046775455 /
!
!     DATA SMALL(1), SMALL(2) / Z00000010, Z00000000 /
!     DATA LARGE(1), LARGE(2) / ZFFFF7FFF, ZFFFFFFFF /
!     DATA RIGHT(1), RIGHT(2) / Z00003CC0, Z00000000 /
!     DATA DIVER(1), DIVER(2) / Z00003CD0, Z00000000 /
!     DATA LOG10(1), LOG10(2) / Z44133FF3, Z79FF509F /
!
!     MACHINE CONSTANTS FOR THE ELXSI 6400
!     (ASSUMING REAL*8 IS THE DEFAULT DOUBLE PRECISION)
!
!     DATA SMALL(1), SMALL(2) / '00100000'X,'00000000'X /
!     DATA LARGE(1), LARGE(2) / '7FEFFFFF'X,'FFFFFFFF'X /
!     DATA RIGHT(1), RIGHT(2) / '3CB00000'X,'00000000'X /
!     DATA DIVER(1), DIVER(2) / '3CC00000'X,'00000000'X /
!     DATA LOG10(1), LOG10(2) / '3FD34413'X,'509F79FF'X /
!
!     MACHINE CONSTANTS FOR THE HARRIS 220
!
!     DATA SMALL(1), SMALL(2) / '20000000, '00000201 /
!     DATA LARGE(1), LARGE(2) / '37777777, '37777577 /
!     DATA RIGHT(1), RIGHT(2) / '20000000, '00000333 /
!     DATA DIVER(1), DIVER(2) / '20000000, '00000334 /
!     DATA LOG10(1), LOG10(2) / '23210115, '10237777 /
!
!     MACHINE CONSTANTS FOR THE HONEYWELL 600/6000 SERIES
!
!     DATA SMALL(1), SMALL(2) / O402400000000, O000000000000 /
!     DATA LARGE(1), LARGE(2) / O376777777777, O777777777777 /
!     DATA RIGHT(1), RIGHT(2) / O604400000000, O000000000000 /
!     DATA DIVER(1), DIVER(2) / O606400000000, O000000000000 /
!     DATA LOG10(1), LOG10(2) / O776464202324, O117571775714 /
!
!     MACHINE CONSTANTS FOR THE HP 730
!
!     DATA DMACH(1) / Z'0010000000000000' /
!     DATA DMACH(2) / Z'7FEFFFFFFFFFFFFF' /
!     DATA DMACH(3) / Z'3CA0000000000000' /
!     DATA DMACH(4) / Z'3CB0000000000000' /
!     DATA DMACH(5) / Z'3FD34413509F79FF' /
!
!     MACHINE CONSTANTS FOR THE HP 2100
!     THREE WORD DOUBLE PRECISION OPTION WITH FTN4
!
!     DATA SMALL(1), SMALL(2), SMALL(3) / 40000B,       0,       1 /
!     DATA LARGE(1), LARGE(2), LARGE(3) / 77777B, 177777B, 177776B /
!     DATA RIGHT(1), RIGHT(2), RIGHT(3) / 40000B,       0,    265B /
!     DATA DIVER(1), DIVER(2), DIVER(3) / 40000B,       0,    276B /
!     DATA LOG10(1), LOG10(2), LOG10(3) / 46420B,  46502B,  77777B /
!
!     MACHINE CONSTANTS FOR THE HP 2100
!     FOUR WORD DOUBLE PRECISION OPTION WITH FTN4
!
!     DATA SMALL(1), SMALL(2) /  40000B,       0 /
!     DATA SMALL(3), SMALL(4) /       0,       1 /
!     DATA LARGE(1), LARGE(2) /  77777B, 177777B /
!     DATA LARGE(3), LARGE(4) / 177777B, 177776B /
!     DATA RIGHT(1), RIGHT(2) /  40000B,       0 /
!     DATA RIGHT(3), RIGHT(4) /       0,    225B /
!     DATA DIVER(1), DIVER(2) /  40000B,       0 /
!     DATA DIVER(3), DIVER(4) /       0,    227B /
!     DATA LOG10(1), LOG10(2) /  46420B,  46502B /
!     DATA LOG10(3), LOG10(4) /  76747B, 176377B /
!
!     MACHINE CONSTANTS FOR THE HP 9000
!
!     DATA SMALL(1), SMALL(2) / 00040000000B, 00000000000B /
!     DATA LARGE(1), LARGE(2) / 17737777777B, 37777777777B /
!     DATA RIGHT(1), RIGHT(2) / 07454000000B, 00000000000B /
!     DATA DIVER(1), DIVER(2) / 07460000000B, 00000000000B /
!     DATA LOG10(1), LOG10(2) / 07764642023B, 12047674777B /
!
!     MACHINE CONSTANTS FOR THE IBM 360/370 SERIES,
!     THE XEROX SIGMA 5/7/9, THE SEL SYSTEMS 85/86, AND
!     THE PERKIN ELMER (INTERDATA) 7/32.
!
!     DATA SMALL(1), SMALL(2) / Z00100000, Z00000000 /
!     DATA LARGE(1), LARGE(2) / Z7FFFFFFF, ZFFFFFFFF /
!     DATA RIGHT(1), RIGHT(2) / Z33100000, Z00000000 /
!     DATA DIVER(1), DIVER(2) / Z34100000, Z00000000 /
!     DATA LOG10(1), LOG10(2) / Z41134413, Z509F79FF /
!
!     MACHINE CONSTANTS FOR THE IBM PC
!     ASSUMES THAT ALL ARITHMETIC IS DONE IN DOUBLE PRECISION
!     ON 8088, I.E., NOT IN 80 BIT FORM FOR THE 8087.
!
!     DATA SMALL(1) / 2.23D-308  /
!     DATA LARGE(1) / 1.79D+308  /
!     DATA RIGHT(1) / 1.11D-16   /
!     DATA DIVER(1) / 2.22D-16   /
!     DATA LOG10(1) / 0.301029995663981195D0 /
!
!     MACHINE CONSTANTS FOR THE IBM RS 6000
!
!     DATA DMACH(1) / Z'0010000000000000' /
!     DATA DMACH(2) / Z'7FEFFFFFFFFFFFFF' /
!     DATA DMACH(3) / Z'3CA0000000000000' /
!     DATA DMACH(4) / Z'3CB0000000000000' /
!     DATA DMACH(5) / Z'3FD34413509F79FF' /
!
!     MACHINE CONSTANTS FOR THE INTEL i860
!
!     DATA DMACH(1) / Z'0010000000000000' /
!     DATA DMACH(2) / Z'7FEFFFFFFFFFFFFF' /
!     DATA DMACH(3) / Z'3CA0000000000000' /
!     DATA DMACH(4) / Z'3CB0000000000000' /
!     DATA DMACH(5) / Z'3FD34413509F79FF' /
!
!     MACHINE CONSTANTS FOR THE PDP-10 (KA PROCESSOR)
!
!     DATA SMALL(1), SMALL(2) / "033400000000, "000000000000 /
!     DATA LARGE(1), LARGE(2) / "377777777777, "344777777777 /
!     DATA RIGHT(1), RIGHT(2) / "113400000000, "000000000000 /
!     DATA DIVER(1), DIVER(2) / "114400000000, "000000000000 /
!     DATA LOG10(1), LOG10(2) / "177464202324, "144117571776 /
!
!     MACHINE CONSTANTS FOR THE PDP-10 (KI PROCESSOR)
!
!     DATA SMALL(1), SMALL(2) / "000400000000, "000000000000 /
!     DATA LARGE(1), LARGE(2) / "377777777777, "377777777777 /
!     DATA RIGHT(1), RIGHT(2) / "103400000000, "000000000000 /
!     DATA DIVER(1), DIVER(2) / "104400000000, "000000000000 /
!     DATA LOG10(1), LOG10(2) / "177464202324, "476747767461 /
!
!     MACHINE CONSTANTS FOR PDP-11 FORTRAN SUPPORTING
!     32-BIT INTEGERS (EXPRESSED IN INTEGER AND OCTAL).
!
!     DATA SMALL(1), SMALL(2) /    8388608,           0 /
!     DATA LARGE(1), LARGE(2) / 2147483647,          -1 /
!     DATA RIGHT(1), RIGHT(2) /  612368384,           0 /
!     DATA DIVER(1), DIVER(2) /  620756992,           0 /
!     DATA LOG10(1), LOG10(2) / 1067065498, -2063872008 /
!
!     DATA SMALL(1), SMALL(2) / O00040000000, O00000000000 /
!     DATA LARGE(1), LARGE(2) / O17777777777, O37777777777 /
!     DATA RIGHT(1), RIGHT(2) / O04440000000, O00000000000 /
!     DATA DIVER(1), DIVER(2) / O04500000000, O00000000000 /
!     DATA LOG10(1), LOG10(2) / O07746420232, O20476747770 /
!
!     MACHINE CONSTANTS FOR PDP-11 FORTRAN SUPPORTING
!     16-BIT INTEGERS (EXPRESSED IN INTEGER AND OCTAL).
!
!     DATA SMALL(1), SMALL(2) /    128,      0 /
!     DATA SMALL(3), SMALL(4) /      0,      0 /
!     DATA LARGE(1), LARGE(2) /  32767,     -1 /
!     DATA LARGE(3), LARGE(4) /     -1,     -1 /
!     DATA RIGHT(1), RIGHT(2) /   9344,      0 /
!     DATA RIGHT(3), RIGHT(4) /      0,      0 /
!     DATA DIVER(1), DIVER(2) /   9472,      0 /
!     DATA DIVER(3), DIVER(4) /      0,      0 /
!     DATA LOG10(1), LOG10(2) /  16282,   8346 /
!     DATA LOG10(3), LOG10(4) / -31493, -12296 /
!
!     DATA SMALL(1), SMALL(2) / O000200, O000000 /
!     DATA SMALL(3), SMALL(4) / O000000, O000000 /
!     DATA LARGE(1), LARGE(2) / O077777, O177777 /
!     DATA LARGE(3), LARGE(4) / O177777, O177777 /
!     DATA RIGHT(1), RIGHT(2) / O022200, O000000 /
!     DATA RIGHT(3), RIGHT(4) / O000000, O000000 /
!     DATA DIVER(1), DIVER(2) / O022400, O000000 /
!     DATA DIVER(3), DIVER(4) / O000000, O000000 /
!     DATA LOG10(1), LOG10(2) / O037632, O020232 /
!     DATA LOG10(3), LOG10(4) / O102373, O147770 /
!
!     MACHINE CONSTANTS FOR THE SILICON GRAPHICS
!
!     DATA SMALL(1), SMALL(2) / Z'00100000', Z'00000000' /
!     DATA LARGE(1), LARGE(2) / Z'7FEFFFFF', Z'FFFFFFFF' /
!     DATA RIGHT(1), RIGHT(2) / Z'3CA00000', Z'00000000' /
!     DATA DIVER(1), DIVER(2) / Z'3CB00000', Z'00000000' /
!     DATA LOG10(1), LOG10(2) / Z'3FD34413', Z'509F79FF' /
!
!     MACHINE CONSTANTS FOR THE SUN
!
!     DATA DMACH(1) / Z'0010000000000000' /
!     DATA DMACH(2) / Z'7FEFFFFFFFFFFFFF' /
!     DATA DMACH(3) / Z'3CA0000000000000' /
!     DATA DMACH(4) / Z'3CB0000000000000' /
!     DATA DMACH(5) / Z'3FD34413509F79FF' /
!
!     MACHINE CONSTANTS FOR THE SUN
!     USING THE -r8 COMPILER OPTION
!
!     DATA DMACH(1) / Z'00010000000000000000000000000000' /
!     DATA DMACH(2) / Z'7FFEFFFFFFFFFFFFFFFFFFFFFFFFFFFF' /
!     DATA DMACH(3) / Z'3F8E0000000000000000000000000000' /
!     DATA DMACH(4) / Z'3F8F0000000000000000000000000000' /
!     DATA DMACH(5) / Z'3FFD34413509F79FEF311F12B35816F9' /
!
!     MACHINE CONSTANTS FOR THE SUN 386i
!
!     DATA SMALL(1), SMALL(2) / Z'FFFFFFFD', Z'000FFFFF' /
!     DATA LARGE(1), LARGE(2) / Z'FFFFFFB0', Z'7FEFFFFF' /
!     DATA RIGHT(1), RIGHT(2) / Z'000000B0', Z'3CA00000' /
!     DATA DIVER(1), DIVER(2) / Z'FFFFFFCB', Z'3CAFFFFF'
!     DATA LOG10(1), LOG10(2) / Z'509F79E9', Z'3FD34413' /
!
!     MACHINE CONSTANTS FOR THE UNIVAC 1100 SERIES FTN COMPILER
!
!     DATA SMALL(1), SMALL(2) / O000040000000, O000000000000 /
!     DATA LARGE(1), LARGE(2) / O377777777777, O777777777777 /
!     DATA RIGHT(1), RIGHT(2) / O170540000000, O000000000000 /
!     DATA DIVER(1), DIVER(2) / O170640000000, O000000000000 /
!     DATA LOG10(1), LOG10(2) / O177746420232, O411757177572 /
!
!***FIRST EXECUTABLE STATEMENT  D1MACH
      IF (I .LT. 1 .OR. I .GT. 5) CALL XERMSG ('SLATEC', 'D1MACH', &
         'I OUT OF BOUNDS', 1, 2)
!
      D1MACH = DMACH(I)
      RETURN
!
      END