*DECK I1MACH
      INTEGER FUNCTION I1MACH (I)
C***BEGIN PROLOGUE  I1MACH
C***PURPOSE  Return integer machine dependent constants.
C***LIBRARY   SLATEC
C***CATEGORY  R1
C***TYPE      INTEGER (I1MACH-I)
C***KEYWORDS  MACHINE CONSTANTS
C***AUTHOR  Fox, P. A., (Bell Labs)
C           Hall, A. D., (Bell Labs)
C           Schryer, N. L., (Bell Labs)
C***DESCRIPTION
C
C   I1MACH can be used to obtain machine-dependent parameters for the
C   local machine environment.  It is a function subprogram with one
C   (input) argument and can be referenced as follows:
C
C        K = I1MACH(I)
C
C   where I=1,...,16.  The (output) value of K above is determined by
C   the (input) value of I.  The results for various values of I are
C   discussed below.
C
C   I/O unit numbers:
C     I1MACH( 1) = the standard input unit.
C     I1MACH( 2) = the standard output unit.
C     I1MACH( 3) = the standard punch unit.
C     I1MACH( 4) = the standard error message unit.
C
C   Words:
C     I1MACH( 5) = the number of bits per integer storage unit.
C     I1MACH( 6) = the number of characters per integer storage unit.
C
C   Integers:
C     assume integers are represented in the S-digit, base-A form
C
C                sign ( X(S-1)*A**(S-1) + ... + X(1)*A + X(0) )
C
C                where 0 .LE. X(I) .LT. A for I=0,...,S-1.
C     I1MACH( 7) = A, the base.
C     I1MACH( 8) = S, the number of base-A digits.
C     I1MACH( 9) = A**S - 1, the largest magnitude.
C
C   Floating-Point Numbers:
C     Assume floating-point numbers are represented in the T-digit,
C     base-B form
C                sign (B**E)*( (X(1)/B) + ... + (X(T)/B**T) )
C
C                where 0 .LE. X(I) .LT. B for I=1,...,T,
C                0 .LT. X(1), and EMIN .LE. E .LE. EMAX.
C     I1MACH(10) = B, the base.
C
C   Single-Precision:
C     I1MACH(11) = T, the number of base-B digits.
C     I1MACH(12) = EMIN, the smallest exponent E.
C     I1MACH(13) = EMAX, the largest exponent E.
C
C   Double-Precision:
C     I1MACH(14) = T, the number of base-B digits.
C     I1MACH(15) = EMIN, the smallest exponent E.
C     I1MACH(16) = EMAX, the largest exponent E.
C
C   To alter this function for a particular environment, the desired
C   set of DATA statements should be activated by removing the C from
C   column 1.  Also, the values of I1MACH(1) - I1MACH(4) should be
C   checked for consistency with the local operating system.
C
C***REFERENCES  P. A. Fox, A. D. Hall and N. L. Schryer, Framework for
C                 a portable library, ACM Transactions on Mathematical
C                 Software 4, 2 (June 1978), pp. 177-188.
C***ROUTINES CALLED  (NONE)
C***REVISION HISTORY  (YYMMDD)
C   750101  DATE WRITTEN
C   891012  Added VAX G-floating constants.  (WRB)
C   891012  REVISION DATE from Version 3.2
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900618  Added DEC RISC constants.  (WRB)
C   900723  Added IBM RS 6000 constants.  (WRB)
C   901009  Correct I1MACH(7) for IBM Mainframes. Should be 2 not 16.
C           (RWC)
C   910710  Added HP 730 constants.  (SMR)
C   911114  Added Convex IEEE constants.  (WRB)
C   920121  Added SUN -r8 compiler option constants.  (WRB)
C   920229  Added Touchstone Delta i860 constants.  (WRB)
C   920501  Reformatted the REFERENCES section.  (WRB)
C   920625  Added Convex -p8 and -pd8 compiler option constants.
C           (BKS, WRB)
C   930201  Added DEC Alpha and SGI constants.  (RWC and WRB)
C   930618  Corrected I1MACH(5) for Convex -p8 and -pd8 compiler
C           options.  (DWL, RWC and WRB).
C***END PROLOGUE  I1MACH
C
      INTEGER IMACH(16),OUTPUT
      SAVE IMACH
      EQUIVALENCE (IMACH(4),OUTPUT)
C
C     MACHINE CONSTANTS FOR THE AMIGA
C     ABSOFT COMPILER
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          5 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -126 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1022 /
C     DATA IMACH(16) /       1023 /
C
C     MACHINE CONSTANTS FOR THE APOLLO
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        129 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1025 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 1700 SYSTEM
C
C     DATA IMACH( 1) /          7 /
C     DATA IMACH( 2) /          2 /
C     DATA IMACH( 3) /          2 /
C     DATA IMACH( 4) /          2 /
C     DATA IMACH( 5) /         36 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         33 /
C     DATA IMACH( 9) / Z1FFFFFFFF /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -256 /
C     DATA IMACH(13) /        255 /
C     DATA IMACH(14) /         60 /
C     DATA IMACH(15) /       -256 /
C     DATA IMACH(16) /        255 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 5700 SYSTEM
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          7 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         48 /
C     DATA IMACH( 6) /          6 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         39 /
C     DATA IMACH( 9) / O0007777777777777 /
C     DATA IMACH(10) /          8 /
C     DATA IMACH(11) /         13 /
C     DATA IMACH(12) /        -50 /
C     DATA IMACH(13) /         76 /
C     DATA IMACH(14) /         26 /
C     DATA IMACH(15) /        -50 /
C     DATA IMACH(16) /         76 /
C
C     MACHINE CONSTANTS FOR THE BURROUGHS 6700/7700 SYSTEMS
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          7 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         48 /
C     DATA IMACH( 6) /          6 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         39 /
C     DATA IMACH( 9) / O0007777777777777 /
C     DATA IMACH(10) /          8 /
C     DATA IMACH(11) /         13 /
C     DATA IMACH(12) /        -50 /
C     DATA IMACH(13) /         76 /
C     DATA IMACH(14) /         26 /
C     DATA IMACH(15) /     -32754 /
C     DATA IMACH(16) /      32780 /
C
C     MACHINE CONSTANTS FOR THE CDC 170/180 SERIES USING NOS/VE
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          7 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         64 /
C     DATA IMACH( 6) /          8 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         63 /
C     DATA IMACH( 9) / 9223372036854775807 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         47 /
C     DATA IMACH(12) /      -4095 /
C     DATA IMACH(13) /       4094 /
C     DATA IMACH(14) /         94 /
C     DATA IMACH(15) /      -4095 /
C     DATA IMACH(16) /       4094 /
C
C     MACHINE CONSTANTS FOR THE CDC 6000/7000 SERIES
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          7 /
C     DATA IMACH( 4) /    6LOUTPUT/
C     DATA IMACH( 5) /         60 /
C     DATA IMACH( 6) /         10 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         48 /
C     DATA IMACH( 9) / 00007777777777777777B /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         47 /
C     DATA IMACH(12) /       -929 /
C     DATA IMACH(13) /       1070 /
C     DATA IMACH(14) /         94 /
C     DATA IMACH(15) /       -929 /
C     DATA IMACH(16) /       1069 /
C
C     MACHINE CONSTANTS FOR THE CELERITY C1260
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          0 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / Z'7FFFFFFF' /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -126 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1022 /
C     DATA IMACH(16) /       1023 /
C
C     MACHINE CONSTANTS FOR THE CONVEX
C     USING THE -fn COMPILER OPTION
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          7 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -127 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1023 /
C     DATA IMACH(16) /       1023 /
C
C     MACHINE CONSTANTS FOR THE CONVEX
C     USING THE -fi COMPILER OPTION
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          7 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        128 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1024 /
C
C     MACHINE CONSTANTS FOR THE CONVEX
C     USING THE -p8 COMPILER OPTION
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          7 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         64 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         63 /
C     DATA IMACH( 9) / 9223372036854775807 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         53 /
C     DATA IMACH(12) /      -1023 /
C     DATA IMACH(13) /       1023 /
C     DATA IMACH(14) /        113 /
C     DATA IMACH(15) /     -16383 /
C     DATA IMACH(16) /      16383 /
C
C     MACHINE CONSTANTS FOR THE CONVEX
C     USING THE -pd8 COMPILER OPTION
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          7 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         64 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         63 /
C     DATA IMACH( 9) / 9223372036854775807 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         53 /
C     DATA IMACH(12) /      -1023 /
C     DATA IMACH(13) /       1023 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1023 /
C     DATA IMACH(16) /       1023 /
C
C     MACHINE CONSTANTS FOR THE CRAY
C     USING THE 46 BIT INTEGER COMPILER OPTION
C
C     DATA IMACH( 1) /        100 /
C     DATA IMACH( 2) /        101 /
C     DATA IMACH( 3) /        102 /
C     DATA IMACH( 4) /        101 /
C     DATA IMACH( 5) /         64 /
C     DATA IMACH( 6) /          8 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         46 /
C     DATA IMACH( 9) / 1777777777777777B /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         47 /
C     DATA IMACH(12) /      -8189 /
C     DATA IMACH(13) /       8190 /
C     DATA IMACH(14) /         94 /
C     DATA IMACH(15) /      -8099 /
C     DATA IMACH(16) /       8190 /
C
C     MACHINE CONSTANTS FOR THE CRAY
C     USING THE 64 BIT INTEGER COMPILER OPTION
C
C     DATA IMACH( 1) /        100 /
C     DATA IMACH( 2) /        101 /
C     DATA IMACH( 3) /        102 /
C     DATA IMACH( 4) /        101 /
C     DATA IMACH( 5) /         64 /
C     DATA IMACH( 6) /          8 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         63 /
C     DATA IMACH( 9) / 777777777777777777777B /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         47 /
C     DATA IMACH(12) /      -8189 /
C     DATA IMACH(13) /       8190 /
C     DATA IMACH(14) /         94 /
C     DATA IMACH(15) /      -8099 /
C     DATA IMACH(16) /       8190 /
C
C     MACHINE CONSTANTS FOR THE DATA GENERAL ECLIPSE S/200
C
C     DATA IMACH( 1) /         11 /
C     DATA IMACH( 2) /         12 /
C     DATA IMACH( 3) /          8 /
C     DATA IMACH( 4) /         10 /
C     DATA IMACH( 5) /         16 /
C     DATA IMACH( 6) /          2 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         15 /
C     DATA IMACH( 9) /      32767 /
C     DATA IMACH(10) /         16 /
C     DATA IMACH(11) /          6 /
C     DATA IMACH(12) /        -64 /
C     DATA IMACH(13) /         63 /
C     DATA IMACH(14) /         14 /
C     DATA IMACH(15) /        -64 /
C     DATA IMACH(16) /         63 /
C
C     MACHINE CONSTANTS FOR THE DEC ALPHA
C     USING G_FLOAT
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          5 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -127 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1023 /
C     DATA IMACH(16) /       1023 /
C
C     MACHINE CONSTANTS FOR THE DEC ALPHA
C     USING IEEE_FLOAT
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        128 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1024 /
C
C     MACHINE CONSTANTS FOR THE DEC RISC
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        128 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1024 /
C
C     MACHINE CONSTANTS FOR THE DEC VAX
C     USING D_FLOATING
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          5 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -127 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         56 /
C     DATA IMACH(15) /       -127 /
C     DATA IMACH(16) /        127 /
C
C     MACHINE CONSTANTS FOR THE DEC VAX
C     USING G_FLOATING
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          5 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -127 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1023 /
C     DATA IMACH(16) /       1023 /
C
C     MACHINE CONSTANTS FOR THE ELXSI 6400
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         32 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -126 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1022 /
C     DATA IMACH(16) /       1023 /
C
C     MACHINE CONSTANTS FOR THE HARRIS 220
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          0 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         24 /
C     DATA IMACH( 6) /          3 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         23 /
C     DATA IMACH( 9) /    8388607 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         23 /
C     DATA IMACH(12) /       -127 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         38 /
C     DATA IMACH(15) /       -127 /
C     DATA IMACH(16) /        127 /
C
C     MACHINE CONSTANTS FOR THE HONEYWELL 600/6000 SERIES
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /         43 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         36 /
C     DATA IMACH( 6) /          6 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         35 /
C     DATA IMACH( 9) / O377777777777 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         27 /
C     DATA IMACH(12) /       -127 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         63 /
C     DATA IMACH(15) /       -127 /
C     DATA IMACH(16) /        127 /
C
C     MACHINE CONSTANTS FOR THE HP 730
C
      DATA IMACH( 1) /          5 /
      DATA IMACH( 2) /          6 /
      DATA IMACH( 3) /          6 /
      DATA IMACH( 4) /          6 /
      DATA IMACH( 5) /         32 /
      DATA IMACH( 6) /          4 /
      DATA IMACH( 7) /          2 /
      DATA IMACH( 8) /         31 /
      DATA IMACH( 9) / 2147483647 /
      DATA IMACH(10) /          2 /
      DATA IMACH(11) /         24 /
      DATA IMACH(12) /       -125 /
      DATA IMACH(13) /        128 /
      DATA IMACH(14) /         53 /
      DATA IMACH(15) /      -1021 /
      DATA IMACH(16) /       1024 /
C
C     MACHINE CONSTANTS FOR THE HP 2100
C     3 WORD DOUBLE PRECISION OPTION WITH FTN4
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          4 /
C     DATA IMACH( 4) /          1 /
C     DATA IMACH( 5) /         16 /
C     DATA IMACH( 6) /          2 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         15 /
C     DATA IMACH( 9) /      32767 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         23 /
C     DATA IMACH(12) /       -128 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         39 /
C     DATA IMACH(15) /       -128 /
C     DATA IMACH(16) /        127 /
C
C     MACHINE CONSTANTS FOR THE HP 2100
C     4 WORD DOUBLE PRECISION OPTION WITH FTN4
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          4 /
C     DATA IMACH( 4) /          1 /
C     DATA IMACH( 5) /         16 /
C     DATA IMACH( 6) /          2 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         15 /
C     DATA IMACH( 9) /      32767 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         23 /
C     DATA IMACH(12) /       -128 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         55 /
C     DATA IMACH(15) /       -128 /
C     DATA IMACH(16) /        127 /
C
C     MACHINE CONSTANTS FOR THE HP 9000
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          7 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         32 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -126 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1015 /
C     DATA IMACH(16) /       1017 /
C
C     MACHINE CONSTANTS FOR THE IBM 360/370 SERIES,
C     THE XEROX SIGMA 5/7/9, THE SEL SYSTEMS 85/86, AND
C     THE PERKIN ELMER (INTERDATA) 7/32.
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          7 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) /  Z7FFFFFFF /
C     DATA IMACH(10) /         16 /
C     DATA IMACH(11) /          6 /
C     DATA IMACH(12) /        -64 /
C     DATA IMACH(13) /         63 /
C     DATA IMACH(14) /         14 /
C     DATA IMACH(15) /        -64 /
C     DATA IMACH(16) /         63 /
C
C     MACHINE CONSTANTS FOR THE IBM PC
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          0 /
C     DATA IMACH( 4) /          0 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1023 /
C
C     MACHINE CONSTANTS FOR THE IBM RS 6000
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          0 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        128 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1024 /
C
C     MACHINE CONSTANTS FOR THE INTEL i860
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        128 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1024 /
C
C     MACHINE CONSTANTS FOR THE PDP-10 (KA PROCESSOR)
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          5 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         36 /
C     DATA IMACH( 6) /          5 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         35 /
C     DATA IMACH( 9) / "377777777777 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         27 /
C     DATA IMACH(12) /       -128 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         54 /
C     DATA IMACH(15) /       -101 /
C     DATA IMACH(16) /        127 /
C
C     MACHINE CONSTANTS FOR THE PDP-10 (KI PROCESSOR)
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          5 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         36 /
C     DATA IMACH( 6) /          5 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         35 /
C     DATA IMACH( 9) / "377777777777 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         27 /
C     DATA IMACH(12) /       -128 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         62 /
C     DATA IMACH(15) /       -128 /
C     DATA IMACH(16) /        127 /
C
C     MACHINE CONSTANTS FOR PDP-11 FORTRAN SUPPORTING
C     32-BIT INTEGER ARITHMETIC.
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          5 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -127 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         56 /
C     DATA IMACH(15) /       -127 /
C     DATA IMACH(16) /        127 /
C
C     MACHINE CONSTANTS FOR PDP-11 FORTRAN SUPPORTING
C     16-BIT INTEGER ARITHMETIC.
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          5 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         16 /
C     DATA IMACH( 6) /          2 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         15 /
C     DATA IMACH( 9) /      32767 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -127 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         56 /
C     DATA IMACH(15) /       -127 /
C     DATA IMACH(16) /        127 /
C
C     MACHINE CONSTANTS FOR THE SILICON GRAPHICS
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        128 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1024 /
C
C     MACHINE CONSTANTS FOR THE SUN
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -125 /
C     DATA IMACH(13) /        128 /
C     DATA IMACH(14) /         53 /
C     DATA IMACH(15) /      -1021 /
C     DATA IMACH(16) /       1024 /
C
C     MACHINE CONSTANTS FOR THE SUN
C     USING THE -r8 COMPILER OPTION
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          6 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         32 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         31 /
C     DATA IMACH( 9) / 2147483647 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         53 /
C     DATA IMACH(12) /      -1021 /
C     DATA IMACH(13) /       1024 /
C     DATA IMACH(14) /        113 /
C     DATA IMACH(15) /     -16381 /
C     DATA IMACH(16) /      16384 /
C
C     MACHINE CONSTANTS FOR THE UNIVAC 1100 SERIES FTN COMPILER
C
C     DATA IMACH( 1) /          5 /
C     DATA IMACH( 2) /          6 /
C     DATA IMACH( 3) /          1 /
C     DATA IMACH( 4) /          6 /
C     DATA IMACH( 5) /         36 /
C     DATA IMACH( 6) /          4 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         35 /
C     DATA IMACH( 9) / O377777777777 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         27 /
C     DATA IMACH(12) /       -128 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         60 /
C     DATA IMACH(15) /      -1024 /
C     DATA IMACH(16) /       1023 /
C
C     MACHINE CONSTANTS FOR THE Z80 MICROPROCESSOR
C
C     DATA IMACH( 1) /          1 /
C     DATA IMACH( 2) /          1 /
C     DATA IMACH( 3) /          0 /
C     DATA IMACH( 4) /          1 /
C     DATA IMACH( 5) /         16 /
C     DATA IMACH( 6) /          2 /
C     DATA IMACH( 7) /          2 /
C     DATA IMACH( 8) /         15 /
C     DATA IMACH( 9) /      32767 /
C     DATA IMACH(10) /          2 /
C     DATA IMACH(11) /         24 /
C     DATA IMACH(12) /       -127 /
C     DATA IMACH(13) /        127 /
C     DATA IMACH(14) /         56 /
C     DATA IMACH(15) /       -127 /
C     DATA IMACH(16) /        127 /
C
C***FIRST EXECUTABLE STATEMENT  I1MACH
      IF (I .LT. 1  .OR.  I .GT. 16) GO TO 10
C
      I1MACH = IMACH(I)
      RETURN
C
   10 CONTINUE
      WRITE (UNIT = OUTPUT, FMT = 9000)
 9000 FORMAT ('1ERROR    1 IN I1MACH - I OUT OF BOUNDS')
C
C     CALL FDUMP
C
      STOP
      END
