DOUBLE PRECISION FUNCTION DPMPAR(I)
      INTEGER I
C     **********
C
C     FUNCTION DPMPAR
C
C     THIS FUNCTION PROVIDES DOUBLE PRECISION MACHINE PARAMETERS
C     WHEN THE APPROPRIATE SET OF DATA STATEMENTS IS ACTIVATED (BY
C     REMOVING THE C FROM COLUMN 1) AND ALL OTHER DATA STATEMENTS ARE
C     RENDERED INACTIVE. MOST OF THE PARAMETER VALUES WERE OBTAINED
C     FROM THE CORRESPONDING BELL LABORATORIES PORT LIBRARY FUNCTION.
C
C     THE FUNCTION STATEMENT IS
C
C       DOUBLE PRECISION FUNCTION DPMPAR(I)
C
C     WHERE
C
C       I IS AN INTEGER INPUT VARIABLE SET TO 1, 2, OR 3 WHICH
C         SELECTS THE DESIRED MACHINE PARAMETER. IF THE MACHINE HAS
C         T BASE B DIGITS AND ITS SMALLEST AND LARGEST EXPONENTS ARE
C         EMIN AND EMAX, RESPECTIVELY, THEN THESE PARAMETERS ARE
C
C         DPMPAR(1) = B**(1 - T), THE MACHINE PRECISION,
C
C         DPMPAR(2) = B**(EMIN - 1), THE SMALLEST MAGNITUDE,
C
C         DPMPAR(3) = B**EMAX*(1 - B**(-T)), THE LARGEST MAGNITUDE.
C
C     ARGONNE NATIONAL LABORATORY. MINPACK PROJECT. MARCH 1980.
C     BURTON S. GARBOW, KENNETH E. HILLSTROM, JORGE J. MORE
C
C     **********
      INTEGER MCHEPS(4)
      INTEGER MINMAG(4)
      INTEGER MAXMAG(4)
      DOUBLE PRECISION DMACH(3)
      EQUIVALENCE (DMACH(1),MCHEPS(1))
      EQUIVALENCE (DMACH(2),MINMAG(1))
      EQUIVALENCE (DMACH(3),MAXMAG(1))
C
C     MACHINE CONSTANTS FOR THE IBM 360/370 SERIES,
C     THE AMDAHL 470/V6, THE ICL 2900, THE ITEL AS/6,
C     THE XEROX SIGMA 5/7/9 AND THE SEL SYSTEMS 85/86.
C
      DATA MCHEPS(1),MCHEPS(2) / Z34100000, Z00000000 /
      DATA MINMAG(1),MINMAG(2) / Z00100000, Z00000000 /
      DATA MAXMAG(1),MAXMAG(2) / Z7FFFFFFF, ZFFFFFFFF /
C
C     MACHINE CONSTANTS FOR THE HONEYWELL 600/6000 SERIES.
C
C     DATA MCHEPS(1),MCHEPS(2) / O606400000000, O000000000000 /
C     DATA MINMAG(1),MINMAG(2) / O402400000000, O000000000000 /
C     DATA MAXMAG(1),MAXMAG(2) / O376777777777, O777777777777 /
C
C     MACHINE CONSTANTS FOR THE CDC 6000/7000 SERIES.
C
C     DATA MCHEPS(1) / 15614000000000000000B /
C     DATA MCHEPS(2) / 15010000000000000000B /
C
C     DATA MINMAG(1) / 00604000000000000000B /
C     DATA MINMAG(2) / 00000000000000000000B /
C
C     DATA MAXMAG(1) / 37767777777777777777B /
C     DATA MAXMAG(2) / 37167777777777777777B /
C
C     MACHINE CONSTANTS FOR THE PDP-10 (KA PROCESSOR).
C
C     DATA MCHEPS(1),MCHEPS(2) / "114400000000, "000000000000 /
C     DATA MINMAG(1),MINMAG(2) / "033400000000, "000000000000 /
C     DATA MAXMAG(1),MAXMAG(2) / "377777777777, "344777777777 /
C
C     MACHINE CONSTANTS FOR THE PDP-10 (KI PROCESSOR).
C
C     DATA MCHEPS(1),MCHEPS(2) / "104400000000, "000000000000 /
C     DATA MINMAG(1),MINMAG(2) / "000400000000, "000000000000 /
C     DATA MAXMAG(1),MAXMAG(2) / "377777777777, "377777777777 /
C
C     MACHINE CONSTANTS FOR THE PDP-11 FORTRAN SUPPORTING
C     32-BIT INTEGERS (EXPRESSED IN INTEGER AND OCTAL).
C
C     DATA MCHEPS(1),MCHEPS(2) /  620756992,           0 /
C     DATA MINMAG(1),MINMAG(2) /    8388608,           0 /
C     DATA MAXMAG(1),MAXMAG(2) / 2147483647,          -1 /
C
C     DATA MCHEPS(1),MCHEPS(2) / O04500000000, O00000000000 /
C     DATA MINMAG(1),MINMAG(2) / O00040000000, O00000000000 /
C     DATA MAXMAG(1),MAXMAG(2) / O17777777777, O37777777777 /
C
C     MACHINE CONSTANTS FOR THE PDP-11 FORTRAN SUPPORTING
C     16-BIT INTEGERS (EXPRESSED IN INTEGER AND OCTAL).
C
C     DATA MCHEPS(1),MCHEPS(2) /   9472,      0 /
C     DATA MCHEPS(3),MCHEPS(4) /      0,      0 /
C
C     DATA MINMAG(1),MINMAG(2) /    128,      0 /
C     DATA MINMAG(3),MINMAG(4) /      0,      0 /
C
C     DATA MAXMAG(1),MAXMAG(2) /  32767,     -1 /
C     DATA MAXMAG(3),MAXMAG(4) /     -1,     -1 /
C
C     DATA MCHEPS(1),MCHEPS(2) / O022400, O000000 /
C     DATA MCHEPS(3),MCHEPS(4) / O000000, O000000 /
C
C     DATA MINMAG(1),MINMAG(2) / O000200, O000000 /
C     DATA MINMAG(3),MINMAG(4) / O000000, O000000 /
C
C     DATA MAXMAG(1),MAXMAG(2) / O077777, O177777 /
C     DATA MAXMAG(3),MAXMAG(4) / O177777, O177777 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 6700/7700 SYSTEMS.
C
C     DATA MCHEPS(1) / O1451000000000000 /
C     DATA MCHEPS(2) / O0000000000000000 /
C
C     DATA MINMAG(1) / O1771000000000000 /
C     DATA MINMAG(2) / O7770000000000000 /
C
C     DATA MAXMAG(1) / O0777777777777777 /
C     DATA MAXMAG(2) / O7777777777777777 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 5700 SYSTEM.
C
C     DATA MCHEPS(1) / O1451000000000000 /
C     DATA MCHEPS(2) / O0000000000000000 /
C
C     DATA MINMAG(1) / O1771000000000000 /
C     DATA MINMAG(2) / O0000000000000000 /
C
C     DATA MAXMAG(1) / O0777777777777777 /
C     DATA MAXMAG(2) / O0007777777777777 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 1700 SYSTEM.
C
C     DATA MCHEPS(1) / ZCC6800000 /
C     DATA MCHEPS(2) / Z000000000 /
C
C     DATA MINMAG(1) / ZC00800000 /
C     DATA MINMAG(2) / Z000000000 /
C
C     DATA MAXMAG(1) / ZDFFFFFFFF /
C     DATA MAXMAG(2) / ZFFFFFFFFF /
C
C     MACHINE CONSTANTS FOR THE UNIVAC 1100 SERIES.
C
C     DATA MCHEPS(1),MCHEPS(2) / O170640000000, O000000000000 /
C     DATA MINMAG(1),MINMAG(2) / O000040000000, O000000000000 /
C     DATA MAXMAG(1),MAXMAG(2) / O377777777777, O777777777777 /
C
C     MACHINE CONSTANTS FOR THE DATA GENERAL ECLIPSE S/200.
C
C     NOTE - IT MAY BE APPROPRIATE TO INCLUDE THE FOLLOWING CARD -
C     STATIC DMACH(3)
C
C     DATA MINMAG/20K,3*0/,MAXMAG/77777K,3*177777K/
C     DATA MCHEPS/32020K,3*0/
C
C     MACHINE CONSTANTS FOR THE HARRIS 220.
C
C     DATA MCHEPS(1),MCHEPS(2) / '20000000, '00000334 /
C     DATA MINMAG(1),MINMAG(2) / '20000000, '00000201 /
C     DATA MAXMAG(1),MAXMAG(2) / '37777777, '37777577 /
C
C     MACHINE CONSTANTS FOR THE CRAY-1.
C
C     DATA MCHEPS(1) / 0376424000000000000000B /
C     DATA MCHEPS(2) / 0000000000000000000000B /
C
C     DATA MINMAG(1) / 0200034000000000000000B /
C     DATA MINMAG(2) / 0000000000000000000000B /
C
C     DATA MAXMAG(1) / 0577777777777777777777B /
C     DATA MAXMAG(2) / 0000007777777777777776B /
C
C     MACHINE CONSTANTS FOR THE PRIME 400.
C
C     DATA MCHEPS(1),MCHEPS(2) / :10000000000, :00000000123 /
C     DATA MINMAG(1),MINMAG(2) / :10000000000, :00000100000 /
C     DATA MAXMAG(1),MAXMAG(2) / :17777777777, :37777677776 /
C
C     MACHINE CONSTANTS FOR THE VAX-11.
C
C     DATA MCHEPS(1),MCHEPS(2) /   9472,  0 /
C     DATA MINMAG(1),MINMAG(2) /    128,  0 /
C     DATA MAXMAG(1),MAXMAG(2) / -32769, -1 /
C
      DPMPAR = DMACH(I)
      RETURN
C
C     LAST CARD OF FUNCTION DPMPAR.
C
      END

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