INTEGER FUNCTION ipmpar(i) C----------------------------------------------------------------------- C C IPMPAR PROVIDES THE INTEGER MACHINE CONSTANTS FOR THE COMPUTER C THAT IS USED. IT IS ASSUMED THAT THE ARGUMENT I IS AN INTEGER C HAVING ONE OF THE VALUES 1-10. IPMPAR(I) HAS THE VALUE ... C C INTEGERS. C C ASSUME INTEGERS ARE REPRESENTED IN THE N-DIGIT, BASE-A FORM C C SIGN ( X(N-1)*A**(N-1) + ... + X(1)*A + X(0) ) C C WHERE 0 .LE. X(I) .LT. A FOR I=0,...,N-1. C C IPMPAR(1) = A, THE BASE. C C IPMPAR(2) = N, THE NUMBER OF BASE-A DIGITS. C C IPMPAR(3) = A**N - 1, THE LARGEST MAGNITUDE. C C FLOATING-POINT NUMBERS. C C IT IS ASSUMED THAT THE SINGLE AND DOUBLE PRECISION FLOATING C POINT ARITHMETICS HAVE THE SAME BASE, SAY B, AND THAT THE C NONZERO NUMBERS ARE REPRESENTED IN THE FORM C C SIGN (B**E) * (X(1)/B + ... + X(M)/B**M) C C WHERE X(I) = 0,1,...,B-1 FOR I=1,...,M, C X(1) .GE. 1, AND EMIN .LE. E .LE. EMAX. C C IPMPAR(4) = B, THE BASE. C C SINGLE-PRECISION C C IPMPAR(5) = M, THE NUMBER OF BASE-B DIGITS. C C IPMPAR(6) = EMIN, THE SMALLEST EXPONENT E. C C IPMPAR(7) = EMAX, THE LARGEST EXPONENT E. C C DOUBLE-PRECISION C C IPMPAR(8) = M, THE NUMBER OF BASE-B DIGITS. C C IPMPAR(9) = EMIN, THE SMALLEST EXPONENT E. C C IPMPAR(10) = EMAX, THE LARGEST EXPONENT E. C C----------------------------------------------------------------------- C C TO DEFINE THIS FUNCTION FOR THE COMPUTER BEING USED, ACTIVATE C THE DATA STATEMENTS FOR THE COMPUTER BY REMOVING THE C FROM C COLUMN 1. (ALL THE OTHER DATA STATEMENTS SHOULD HAVE C IN C COLUMN 1.) C C----------------------------------------------------------------------- C C IPMPAR IS AN ADAPTATION OF THE FUNCTION I1MACH, WRITTEN BY C P.A. FOX, A.D. HALL, AND N.L. SCHRYER (BELL LABORATORIES). C IPMPAR WAS FORMED BY A.H. MORRIS (NSWC). THE CONSTANTS ARE C FROM BELL LABORATORIES, NSWC, AND OTHER SOURCES. C C----------------------------------------------------------------------- C .. Scalar Arguments .. INTEGER i C .. C .. Local Arrays .. INTEGER imach(10) C .. C .. Data statements .. C C MACHINE CONSTANTS FOR AMDAHL MACHINES. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 16 / C DATA IMACH( 5) / 6 / C DATA IMACH( 6) / -64 / C DATA IMACH( 7) / 63 / C DATA IMACH( 8) / 14 / C DATA IMACH( 9) / -64 / C DATA IMACH(10) / 63 / C C MACHINE CONSTANTS FOR THE AT&T 3B SERIES, AT&T C PC 7300, AND AT&T 6300. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 24 / C DATA IMACH( 6) / -125 / C DATA IMACH( 7) / 128 / C DATA IMACH( 8) / 53 / C DATA IMACH( 9) / -1021 / C DATA IMACH(10) / 1024 / C C MACHINE CONSTANTS FOR THE BURROUGHS 1700 SYSTEM. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 33 / C DATA IMACH( 3) / 8589934591 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 24 / C DATA IMACH( 6) / -256 / C DATA IMACH( 7) / 255 / C DATA IMACH( 8) / 60 / C DATA IMACH( 9) / -256 / C DATA IMACH(10) / 255 / C C MACHINE CONSTANTS FOR THE BURROUGHS 5700 SYSTEM. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 39 / C DATA IMACH( 3) / 549755813887 / C DATA IMACH( 4) / 8 / C DATA IMACH( 5) / 13 / C DATA IMACH( 6) / -50 / C DATA IMACH( 7) / 76 / C DATA IMACH( 8) / 26 / C DATA IMACH( 9) / -50 / C DATA IMACH(10) / 76 / C C MACHINE CONSTANTS FOR THE BURROUGHS 6700/7700 SYSTEMS. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 39 / C DATA IMACH( 3) / 549755813887 / C DATA IMACH( 4) / 8 / C DATA IMACH( 5) / 13 / C DATA IMACH( 6) / -50 / C DATA IMACH( 7) / 76 / C DATA IMACH( 8) / 26 / C DATA IMACH( 9) / -32754 / C DATA IMACH(10) / 32780 / C C MACHINE CONSTANTS FOR THE CDC 6000/7000 SERIES C 60 BIT ARITHMETIC, AND THE CDC CYBER 995 64 BIT C ARITHMETIC (NOS OPERATING SYSTEM). C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 48 / C DATA IMACH( 3) / 281474976710655 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 48 / C DATA IMACH( 6) / -974 / C DATA IMACH( 7) / 1070 / C DATA IMACH( 8) / 95 / C DATA IMACH( 9) / -926 / C DATA IMACH(10) / 1070 / C C MACHINE CONSTANTS FOR THE CDC CYBER 995 64 BIT C ARITHMETIC (NOS/VE OPERATING SYSTEM). C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 63 / C DATA IMACH( 3) / 9223372036854775807 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 48 / C DATA IMACH( 6) / -4096 / C DATA IMACH( 7) / 4095 / C DATA IMACH( 8) / 96 / C DATA IMACH( 9) / -4096 / C DATA IMACH(10) / 4095 / C C MACHINE CONSTANTS FOR THE CRAY 1, XMP, 2, AND 3. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 63 / C DATA IMACH( 3) / 9223372036854775807 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 47 / C DATA IMACH( 6) / -8189 / C DATA IMACH( 7) / 8190 / C DATA IMACH( 8) / 94 / C DATA IMACH( 9) / -8099 / C DATA IMACH(10) / 8190 / C C MACHINE CONSTANTS FOR THE DATA GENERAL ECLIPSE S/200. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 15 / C DATA IMACH( 3) / 32767 / C DATA IMACH( 4) / 16 / C DATA IMACH( 5) / 6 / C DATA IMACH( 6) / -64 / C DATA IMACH( 7) / 63 / C DATA IMACH( 8) / 14 / C DATA IMACH( 9) / -64 / C DATA IMACH(10) / 63 / C C MACHINE CONSTANTS FOR THE HARRIS 220. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 23 / C DATA IMACH( 3) / 8388607 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 23 / C DATA IMACH( 6) / -127 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 38 / C DATA IMACH( 9) / -127 / C DATA IMACH(10) / 127 / C C MACHINE CONSTANTS FOR THE HONEYWELL 600/6000 C AND DPS 8/70 SERIES. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 35 / C DATA IMACH( 3) / 34359738367 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 27 / C DATA IMACH( 6) / -127 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 63 / C DATA IMACH( 9) / -127 / C DATA IMACH(10) / 127 / C C MACHINE CONSTANTS FOR THE HP 2100 C 3 WORD DOUBLE PRECISION OPTION WITH FTN4 C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 15 / C DATA IMACH( 3) / 32767 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 23 / C DATA IMACH( 6) / -128 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 39 / C DATA IMACH( 9) / -128 / C DATA IMACH(10) / 127 / C C MACHINE CONSTANTS FOR THE HP 2100 C 4 WORD DOUBLE PRECISION OPTION WITH FTN4 C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 15 / C DATA IMACH( 3) / 32767 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 23 / C DATA IMACH( 6) / -128 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 55 / C DATA IMACH( 9) / -128 / C DATA IMACH(10) / 127 / C C MACHINE CONSTANTS FOR THE HP 9000. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 24 / C DATA IMACH( 6) / -126 / C DATA IMACH( 7) / 128 / C DATA IMACH( 8) / 53 / C DATA IMACH( 9) / -1021 / C DATA IMACH(10) / 1024 / C C MACHINE CONSTANTS FOR THE IBM 360/370 SERIES, C THE ICL 2900, THE ITEL AS/6, THE XEROX SIGMA C 5/7/9 AND THE SEL SYSTEMS 85/86. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 16 / C DATA IMACH( 5) / 6 / C DATA IMACH( 6) / -64 / C DATA IMACH( 7) / 63 / C DATA IMACH( 8) / 14 / C DATA IMACH( 9) / -64 / C DATA IMACH(10) / 63 / C C MACHINE CONSTANTS FOR THE IBM PC. C C DATA imach(1)/2/ C DATA imach(2)/31/ C DATA imach(3)/2147483647/ C DATA imach(4)/2/ C DATA imach(5)/24/ C DATA imach(6)/-125/ C DATA imach(7)/128/ C DATA imach(8)/53/ C DATA imach(9)/-1021/ C DATA imach(10)/1024/ C C MACHINE CONSTANTS FOR THE MACINTOSH II - ABSOFT C MACFORTRAN II. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 24 / C DATA IMACH( 6) / -125 / C DATA IMACH( 7) / 128 / C DATA IMACH( 8) / 53 / C DATA IMACH( 9) / -1021 / C DATA IMACH(10) / 1024 / C C MACHINE CONSTANTS FOR THE MICROVAX - VMS FORTRAN. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 24 / C DATA IMACH( 6) / -127 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 56 / C DATA IMACH( 9) / -127 / C DATA IMACH(10) / 127 / C C MACHINE CONSTANTS FOR THE PDP-10 (KA PROCESSOR). C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 35 / C DATA IMACH( 3) / 34359738367 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 27 / C DATA IMACH( 6) / -128 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 54 / C DATA IMACH( 9) / -101 / C DATA IMACH(10) / 127 / C C MACHINE CONSTANTS FOR THE PDP-10 (KI PROCESSOR). C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 35 / C DATA IMACH( 3) / 34359738367 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 27 / C DATA IMACH( 6) / -128 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 62 / C DATA IMACH( 9) / -128 / C DATA IMACH(10) / 127 / C C MACHINE CONSTANTS FOR THE PDP-11 FORTRAN SUPPORTING C 32-BIT INTEGER ARITHMETIC. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 24 / C DATA IMACH( 6) / -127 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 56 / C DATA IMACH( 9) / -127 / C DATA IMACH(10) / 127 / C C MACHINE CONSTANTS FOR THE SEQUENT BALANCE 8000. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 24 / C DATA IMACH( 6) / -125 / C DATA IMACH( 7) / 128 / C DATA IMACH( 8) / 53 / C DATA IMACH( 9) / -1021 / C DATA IMACH(10) / 1024 / C C MACHINE CONSTANTS FOR THE SILICON GRAPHICS IRIS-4D C SERIES (MIPS R3000 PROCESSOR). C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 24 / C DATA IMACH( 6) / -125 / C DATA IMACH( 7) / 128 / C DATA IMACH( 8) / 53 / C DATA IMACH( 9) / -1021 / C DATA IMACH(10) / 1024 / C C MACHINE CONSTANTS FOR IEEE ARITHMETIC MACHINES, SUCH AS THE AT&T C 3B SERIES, MOTOROLA 68000 BASED MACHINES (E.G. SUN 3 AND AT&T C PC 7300), AND 8087 BASED MICROS (E.G. IBM PC AND AT&T 6300). C DATA IMACH( 1) / 2 / DATA IMACH( 2) / 31 / DATA IMACH( 3) / 2147483647 / DATA IMACH( 4) / 2 / DATA IMACH( 5) / 24 / DATA IMACH( 6) / -125 / DATA IMACH( 7) / 128 / DATA IMACH( 8) / 53 / DATA IMACH( 9) / -1021 / DATA IMACH(10) / 1024 / C C MACHINE CONSTANTS FOR THE UNIVAC 1100 SERIES. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 35 / C DATA IMACH( 3) / 34359738367 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 27 / C DATA IMACH( 6) / -128 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 60 / C DATA IMACH( 9) /-1024 / C DATA IMACH(10) / 1023 / C C MACHINE CONSTANTS FOR THE VAX 11/780. C C DATA IMACH( 1) / 2 / C DATA IMACH( 2) / 31 / C DATA IMACH( 3) / 2147483647 / C DATA IMACH( 4) / 2 / C DATA IMACH( 5) / 24 / C DATA IMACH( 6) / -127 / C DATA IMACH( 7) / 127 / C DATA IMACH( 8) / 56 / C DATA IMACH( 9) / -127 / C DATA IMACH(10) / 127 / C ipmpar = imach(i) RETURN END