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dpmpar.c
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dpmpar.c
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#include "cminpack.h"
#include <float.h>
#include "cminpackP.h"
#define DPMPAR(type,X) _DPMPAR(type,X)
#define _DPMPAR(type,X) type ## _ ## X
__cminpack_attr__
real __cminpack_func__(dpmpar)(int i)
{
/* ********** */
/* Function dpmpar */
/* This function provides double precision machine parameters */
/* when the appropriate set of data statements is activated (by */
/* removing the c from column 1) and all other data statements are */
/* rendered inactive. Most of the parameter values were obtained */
/* from the corresponding Bell Laboratories Port Library function. */
/* The function statement is */
/* double precision function dpmpar(i) */
/* where */
/* i is an integer input variable set to 1, 2, or 3 which */
/* selects the desired machine parameter. If the machine has */
/* t base b digits and its smallest and largest exponents are */
/* emin and emax, respectively, then these parameters are */
/* dpmpar(1) = b**(1 - t), the machine precision, */
/* dpmpar(2) = b**(emin - 1), the smallest magnitude, */
/* dpmpar(3) = b**emax*(1 - b**(-t)), the largest magnitude. */
/* Argonne National Laboratory. MINPACK Project. November 1996. */
/* Burton S. Garbow, Kenneth E. Hillstrom, Jorge J. More' */
/* ********** */
/* Machine constants for the IBM 360/370 series, */
/* the Amdahl 470/V6, the ICL 2900, the Itel AS/6, */
/* the Xerox Sigma 5/7/9 and the Sel systems 85/86. */
/* data mcheps(1),mcheps(2) / z34100000, z00000000 / */
/* data minmag(1),minmag(2) / z00100000, z00000000 / */
/* data maxmag(1),maxmag(2) / z7fffffff, zffffffff / */
/* Machine constants for the Honeywell 600/6000 series. */
/* data mcheps(1),mcheps(2) / o606400000000, o000000000000 / */
/* data minmag(1),minmag(2) / o402400000000, o000000000000 / */
/* data maxmag(1),maxmag(2) / o376777777777, o777777777777 / */
/* Machine constants for the CDC 6000/7000 series. */
/* data mcheps(1) / 15614000000000000000b / */
/* data mcheps(2) / 15010000000000000000b / */
/* data minmag(1) / 00604000000000000000b / */
/* data minmag(2) / 00000000000000000000b / */
/* data maxmag(1) / 37767777777777777777b / */
/* data maxmag(2) / 37167777777777777777b / */
/* Machine constants for the PDP-10 (KA processor). */
/* data mcheps(1),mcheps(2) / "114400000000, "000000000000 / */
/* data minmag(1),minmag(2) / "033400000000, "000000000000 / */
/* data maxmag(1),maxmag(2) / "377777777777, "344777777777 / */
/* Machine constants for the PDP-10 (KI processor). */
/* data mcheps(1),mcheps(2) / "104400000000, "000000000000 / */
/* data minmag(1),minmag(2) / "000400000000, "000000000000 / */
/* data maxmag(1),maxmag(2) / "377777777777, "377777777777 / */
/* Machine constants for the PDP-11. */
/* data mcheps(1),mcheps(2) / 9472, 0 / */
/* data mcheps(3),mcheps(4) / 0, 0 / */
/* data minmag(1),minmag(2) / 128, 0 / */
/* data minmag(3),minmag(4) / 0, 0 / */
/* data maxmag(1),maxmag(2) / 32767, -1 / */
/* data maxmag(3),maxmag(4) / -1, -1 / */
/* Machine constants for the Burroughs 6700/7700 systems. */
/* data mcheps(1) / o1451000000000000 / */
/* data mcheps(2) / o0000000000000000 / */
/* data minmag(1) / o1771000000000000 / */
/* data minmag(2) / o7770000000000000 / */
/* data maxmag(1) / o0777777777777777 / */
/* data maxmag(2) / o7777777777777777 / */
/* Machine constants for the Burroughs 5700 system. */
/* data mcheps(1) / o1451000000000000 / */
/* data mcheps(2) / o0000000000000000 / */
/* data minmag(1) / o1771000000000000 / */
/* data minmag(2) / o0000000000000000 / */
/* data maxmag(1) / o0777777777777777 / */
/* data maxmag(2) / o0007777777777777 / */
/* Machine constants for the Burroughs 1700 system. */
/* data mcheps(1) / zcc6800000 / */
/* data mcheps(2) / z000000000 / */
/* data minmag(1) / zc00800000 / */
/* data minmag(2) / z000000000 / */
/* data maxmag(1) / zdffffffff / */
/* data maxmag(2) / zfffffffff / */
/* Machine constants for the Univac 1100 series. */
/* data mcheps(1),mcheps(2) / o170640000000, o000000000000 / */
/* data minmag(1),minmag(2) / o000040000000, o000000000000 / */
/* data maxmag(1),maxmag(2) / o377777777777, o777777777777 / */
/* Machine constants for the Data General Eclipse S/200. */
/* Note - it may be appropriate to include the following card - */
/* static dmach(3) */
/* data minmag/20k,3*0/,maxmag/77777k,3*177777k/ */
/* data mcheps/32020k,3*0/ */
/* Machine constants for the Harris 220. */
/* data mcheps(1),mcheps(2) / '20000000, '00000334 / */
/* data minmag(1),minmag(2) / '20000000, '00000201 / */
/* data maxmag(1),maxmag(2) / '37777777, '37777577 / */
/* Machine constants for the Cray-1. */
/* data mcheps(1) / 0376424000000000000000b / */
/* data mcheps(2) / 0000000000000000000000b / */
/* data minmag(1) / 0200034000000000000000b / */
/* data minmag(2) / 0000000000000000000000b / */
/* data maxmag(1) / 0577777777777777777777b / */
/* data maxmag(2) / 0000007777777777777776b / */
/* Machine constants for the Prime 400. */
/* data mcheps(1),mcheps(2) / :10000000000, :00000000123 / */
/* data minmag(1),minmag(2) / :10000000000, :00000100000 / */
/* data maxmag(1),maxmag(2) / :17777777777, :37777677776 / */
/* Machine constants for the VAX-11. */
/* data mcheps(1),mcheps(2) / 9472, 0 / */
/* data minmag(1),minmag(2) / 128, 0 / */
/* data maxmag(1),maxmag(2) / -32769, -1 / */
/* Machine constants for IEEE machines. */
/* data dmach(1) /2.22044604926d-16/ */
/* data dmach(2) /2.22507385852d-308/ */
/* data dmach(3) /1.79769313485d+308/ */
switch(i) {
case 1:
return DPMPAR(realm,EPSILON); /* 2.2204460492503131e-16 | 1.19209290e-07F */
case 2:
return DPMPAR(realm,MIN); /* 2.2250738585072014e-308 | 1.17549435e-38F */
default:
return DPMPAR(realm,MAX); /* 1.7976931348623157e+308 | 3.40282347e+38F */
}
/* Last card of function dpmpar. */
} /* dpmpar_ */
#undef mcheps
#undef maxmag
#undef minmag
#undef dmach