b4e3f2f94a
o Add a MD header private to libc called _fpmath.h; this header
contains bitfield layouts of MD floating-point types.
o Add a MI header private to libc called fpmath.h; this header
contains bitfield layouts of MI floating-point types.
o Add private libc variables to lib/libc/$arch/gen/infinity.c for
storing NaN values.
o Add __double_t and __float_t to <machine/_types.h>, and provide
double_t and float_t typedefs in <math.h>.
o Add some C99 manifest constants (FP_ILOGB0, FP_ILOGBNAN, HUGE_VALF,
HUGE_VALL, INFINITY, NAN, and return values for fpclassify()) to
<math.h> and others (FLT_EVAL_METHOD, DECIMAL_DIG) to <float.h> via
<machine/float.h>.
o Add C99 macro fpclassify() which calls __fpclassify{d,f,l}() based
on the size of its argument. __fpclassifyl() is never called on
alpha because (sizeof(long double) == sizeof(double)), which is good
since __fpclassifyl() can't deal with such a small `long double'.
This was developed by David Schultz and myself with input from bde and
fenner.
PR: 23103
Submitted by: David Schultz <dschultz@uclink.Berkeley.EDU>
(significant portions)
Reviewed by: bde, fenner (earlier versions)
92 lines
3.7 KiB
C
92 lines
3.7 KiB
C
/*
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* Copyright (c) 1992, 1993, 2001
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)float.h 8.1 (Berkeley) 6/11/93
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* from: NetBSD: float.h,v 1.3 2001/09/21 20:48:02 eeh Exp
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* $FreeBSD$
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*/
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#ifndef _MACHINE_FLOAT_H_
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#define _MACHINE_FLOAT_H_
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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extern int __flt_rounds(void);
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__END_DECLS
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#define FLT_RADIX 2 /* b */
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#define FLT_ROUNDS __flt_rounds()
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#define FLT_EVAL_METHOD 0 /* no promotion */
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#define DECIMAL_DIG 35 /* max precision in decimal digits */
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#define FLT_MANT_DIG 24 /* p */
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#define FLT_EPSILON 1.19209290E-7F /* b**(1-p) */
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#define FLT_DIG 6 /* floor((p-1)*log10(b))+(b == 10) */
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#define FLT_MIN_EXP (-125) /* emin */
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#define FLT_MIN 1.17549435E-38F /* b**(emin-1) */
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#define FLT_MIN_10_EXP (-37) /* ceil(log10(b**(emin-1))) */
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#define FLT_MAX_EXP 128 /* emax */
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#define FLT_MAX 3.40282347E+38F /* (1-b**(-p))*b**emax */
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#define FLT_MAX_10_EXP 38 /* floor(log10((1-b**(-p))*b**emax)) */
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#define DBL_MANT_DIG 53
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#define DBL_EPSILON 2.2204460492503131E-16
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#define DBL_DIG 15
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#define DBL_MIN_EXP (-1021)
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#define DBL_MIN 2.2250738585072014E-308
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#define DBL_MIN_10_EXP (-307)
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#define DBL_MAX_EXP 1024
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#define DBL_MAX 1.7976931348623157E+308
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#define DBL_MAX_10_EXP 308
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#define LDBL_MANT_DIG 113
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#define LDBL_EPSILON 1.925929944387235853055977942584927319E-34L
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#define LDBL_DIG 33
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#define LDBL_MIN_EXP (-16381)
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#define LDBL_MIN 3.362103143112093506262677817321752603E-4932L
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#define LDBL_MIN_10_EXP (-4931)
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#define LDBL_MAX_EXP (+16384)
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#define LDBL_MAX 1.189731495357231765085759326628007016E+4932L
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#define LDBL_MAX_10_EXP (+4932)
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#endif /* _MACHINE_FLOAT_H_ */
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