176 lines
5.8 KiB
C++
176 lines
5.8 KiB
C++
// This may look like C code, but it is really -*- C++ -*-
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/*
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Copyright (C) 1988 Free Software Foundation
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written by Doug Lea (dl@rocky.oswego.edu)
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This file is part of the GNU C++ Library. This library is free
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software; you can redistribute it and/or modify it under the terms of
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the GNU Library General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version. This library is distributed in the hope
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that it will be useful, but WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: values.h,v 1.3 1993/08/02 17:22:22 mycroft Exp $
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*/
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#ifndef _values_h
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#define _values_h 1
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#define BITSPERBYTE 8
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#define BITS(type) (BITSPERBYTE * (int)sizeof(type))
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#define CHARBITS BITS(char)
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#define SHORTBITS BITS(short)
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#define INTBITS BITS(int)
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#define LONGBITS BITS(long)
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#define PTRBITS BITS(char*)
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#define DOUBLEBITS BITS(double)
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#define FLOATBITS BITS(float)
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#define MINSHORT ((short)(1 << (SHORTBITS - 1)))
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#define MININT (1 << (INTBITS - 1))
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#define MINLONG (1L << (LONGBITS - 1))
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#define MAXSHORT ((short)~MINSHORT)
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#define MAXINT (~MININT)
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#define MAXLONG (~MINLONG)
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#define HIBITS MINSHORT
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#define HIBITL MINLONG
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#if defined(sun) || defined(hp300) || defined(hpux) || defined(masscomp) || defined(sgi)
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#ifdef masscomp
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#define MAXDOUBLE \
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({ \
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double maxdouble_val; \
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\
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__asm ("fmove%.d #0x7fefffffffffffff,%0" /* Max double */ \
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: "=f" (maxdouble_val) \
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: /* no inputs */); \
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maxdouble_val; \
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})
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#define MAXFLOAT ((float) 3.40e+38)
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#else
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#define MAXDOUBLE 1.79769313486231470e+308
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#define MAXFLOAT ((float)3.40282346638528860e+38)
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#endif
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#define MINDOUBLE 4.94065645841246544e-324
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#define MINFLOAT ((float)1.40129846432481707e-45)
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#define _IEEE 1
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#define _DEXPLEN 11
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#define _FEXPLEN 8
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#define _HIDDENBIT 1
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#define DMINEXP (-(DMAXEXP + DSIGNIF - _HIDDENBIT - 3))
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#define FMINEXP (-(FMAXEXP + FSIGNIF - _HIDDENBIT - 3))
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#define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE)
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#define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE)
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#elif defined(sony)
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#define MAXDOUBLE 1.79769313486231470e+308
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#define MAXFLOAT ((float)3.40282346638528860e+38)
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#define MINDOUBLE 2.2250738585072010e-308
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#define MINFLOAT ((float)1.17549435e-38)
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#define _IEEE 1
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#define _DEXPLEN 11
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#define _FEXPLEN 8
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#define _HIDDENBIT 1
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#define DMINEXP (-(DMAXEXP + DSIGNIF - _HIDDENBIT - 3))
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#define FMINEXP (-(FMAXEXP + FSIGNIF - _HIDDENBIT - 3))
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#define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE)
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#define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE)
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#elif defined(sequent)
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extern double _maxdouble, _mindouble;
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extern float _maxfloat, _minfloat;
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#define MAXDOUBLE _maxdouble
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#define MAXFLOAT _maxfloat
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#define MINDOUBLE _mindouble
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#define MINFLOAT _minfloat
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#define _IEEE 1
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#define _DEXPLEN 11
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#define _FEXPLEN 8
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#define _HIDDENBIT 1
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#define DMINEXP (-(DMAXEXP - 3))
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#define FMINEXP (-(FMAXEXP - 3))
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#define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE)
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#define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE)
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#elif defined(i386)
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#define MAXDOUBLE 1.79769313486231570e+308
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#define MAXFLOAT ((float)3.40282346638528860e+38)
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#define MINDOUBLE 2.22507385850720140e-308
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#define MINFLOAT ((float)1.17549435082228750e-38)
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#define _IEEE 0
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#define _DEXPLEN 11
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#define _FEXPLEN 8
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#define _HIDDENBIT 1
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#define DMINEXP (-DMAXEXP)
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#define FMINEXP (-FMAXEXP)
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#define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE)
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#define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE)
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/* from Andrew Klossner <andrew%frip.wv.tek.com@relay.cs.net> */
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#elif defined(m88k)
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/* These are "good" guesses ...
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I'll figure out the true mins and maxes later, at the time I find
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out the mins and maxes that the compiler can tokenize. */
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#define MAXDOUBLE 1.79769313486231e+308
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#define MAXFLOAT ((float)3.40282346638528e+38)
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#define MINDOUBLE 2.22507385850720e-308
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#define MINFLOAT ((float)1.17549435082228e-38)
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#define _IEEE 1
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#define _DEXPLEN 11
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#define _FEXPLEN 8
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#define _HIDDENBIT 1
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#define DMINEXP (1-DMAXEXP)
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#define FMINEXP (1-FMAXEXP)
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#define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE)
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#define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE)
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#elif defined(convex)
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#define MAXDOUBLE 8.9884656743115785e+306
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#define MAXFLOAT ((float) 1.70141173e+38)
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#define MINDOUBLE 5.5626846462680035e-308
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#define MINFLOAT ((float) 2.93873588e-39)
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#define _IEEE 0
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#define _DEXPLEN 11
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#define _FEXPLEN 8
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#define _HIDDENBIT 1
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#define DMINEXP (-DMAXEXP)
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#define FMINEXP (-FMAXEXP)
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#define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE)
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#define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE)
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// #elif defined(vax)
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// use vax versions by default -- they seem to be the most conservative
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#else
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#define MAXDOUBLE 1.701411834604692293e+38
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#define MINDOUBLE (2.938735877055718770e-39)
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#define MAXFLOAT 1.7014117331926443e+38
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#define MINFLOAT 2.9387358770557188e-39
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#define _IEEE 0
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#define _DEXPLEN 8
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#define _FEXPLEN 8
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#define _HIDDENBIT 1
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#define DMINEXP (-DMAXEXP)
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#define FMINEXP (-FMAXEXP)
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#define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE)
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#define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE)
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#endif
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#define DSIGNIF (DOUBLEBITS - _DEXPLEN + _HIDDENBIT - 1)
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#define FSIGNIF (FLOATBITS - _FEXPLEN + _HIDDENBIT - 1)
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#define DMAXPOWTWO ((double)(1L << LONGBITS -2)*(1L << DSIGNIF - LONGBITS +1))
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#define FMAXPOWTWO ((float)(1L << FSIGNIF - 1))
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#endif
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