f3d2db418f
expressions on i386 are evaluated in the range of the long double type, so this is wrong in a different but hopefully less worse way than before. Since expressions are evaluated in long double registers, there is no runtime cost to using long double instead of double to declare intermediate values (except in cases where this avoids compiler bugs), and by careful use of float_t or double_t it is possible to avoid some of the compiler bugs in this area, provided these types are declared as long double. I was going to change float.h to be less broken and more usable in combination with the change here (in particular, it is more necessary to know the effective number of bits in a double_t when double_t != double, since DBL_MANT_DIG no longer logically gives this, and LDBL_MANT_DIG doesn't give it either with FreeBSD-i386's default rounding precision. However, this was too hard for now. In particular, LDBL_MANT_DIG is used a lot in libm, so it cannot be changed. One thing that is completely broken now is LDBL_MAX. This may have sort of worked when it was changed from DBL_MAX in 2002 (adding 0 to it at runtime gave +Inf, but you could at least compare with it), but starting with gcc-3.3.1 in 2003, it is always +Inf due to evaluating it at compile time in the default rounding precision.
135 lines
4.7 KiB
C
135 lines
4.7 KiB
C
/*-
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* Copyright (c) 2002 Mike Barcroft <mike@FreeBSD.org>
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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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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* From: @(#)ansi.h 8.2 (Berkeley) 1/4/94
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* From: @(#)types.h 8.3 (Berkeley) 1/5/94
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* $FreeBSD$
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*/
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#ifndef _MACHINE__TYPES_H_
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#define _MACHINE__TYPES_H_
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#ifndef _SYS_CDEFS_H_
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#error this file needs sys/cdefs.h as a prerequisite
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#endif
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#define __NO_STRICT_ALIGNMENT
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/*
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* Basic types upon which most other types are built.
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*/
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typedef __signed char __int8_t;
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typedef unsigned char __uint8_t;
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typedef short __int16_t;
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typedef unsigned short __uint16_t;
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typedef int __int32_t;
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typedef unsigned int __uint32_t;
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#if defined(lint)
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/* LONGLONG */
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typedef long long __int64_t;
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/* LONGLONG */
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typedef unsigned long long __uint64_t;
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#elif defined(__GNUCLIKE_ATTRIBUTE_MODE_DI)
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typedef int __attribute__((__mode__(__DI__))) __int64_t;
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typedef unsigned int __attribute__((__mode__(__DI__))) __uint64_t;
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#else
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/* LONGLONG */
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typedef long long __int64_t;
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/* LONGLONG */
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typedef unsigned long long __uint64_t;
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#endif
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/*
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* Standard type definitions.
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*/
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typedef unsigned long __clock_t; /* clock()... */
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typedef unsigned int __cpumask_t;
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typedef __int32_t __critical_t;
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typedef long double __double_t;
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typedef long double __float_t;
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typedef __int32_t __intfptr_t;
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typedef __int64_t __intmax_t;
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typedef __int32_t __intptr_t;
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typedef __int32_t __int_fast8_t;
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typedef __int32_t __int_fast16_t;
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typedef __int32_t __int_fast32_t;
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typedef __int64_t __int_fast64_t;
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typedef __int8_t __int_least8_t;
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typedef __int16_t __int_least16_t;
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typedef __int32_t __int_least32_t;
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typedef __int64_t __int_least64_t;
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typedef __int32_t __ptrdiff_t; /* ptr1 - ptr2 */
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typedef __int32_t __register_t;
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typedef __int32_t __segsz_t; /* segment size (in pages) */
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typedef __uint32_t __size_t; /* sizeof() */
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typedef __int32_t __ssize_t; /* byte count or error */
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typedef __int32_t __time_t; /* time()... */
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typedef __uint32_t __uintfptr_t;
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typedef __uint64_t __uintmax_t;
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typedef __uint32_t __uintptr_t;
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typedef __uint32_t __uint_fast8_t;
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typedef __uint32_t __uint_fast16_t;
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typedef __uint32_t __uint_fast32_t;
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typedef __uint64_t __uint_fast64_t;
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typedef __uint8_t __uint_least8_t;
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typedef __uint16_t __uint_least16_t;
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typedef __uint32_t __uint_least32_t;
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typedef __uint64_t __uint_least64_t;
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typedef __uint32_t __u_register_t;
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typedef __uint32_t __vm_offset_t;
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typedef __int64_t __vm_ooffset_t;
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#ifdef PAE
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typedef __uint64_t __vm_paddr_t;
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#else
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typedef __uint32_t __vm_paddr_t;
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#endif
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typedef __uint64_t __vm_pindex_t;
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typedef __uint32_t __vm_size_t;
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/*
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* Unusual type definitions.
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*/
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#ifdef __GNUCLIKE_BUILTIN_VARARGS
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typedef __builtin_va_list __va_list; /* internally known to gcc */
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#else
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typedef char * __va_list;
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#endif /* __GNUCLIKE_BUILTIN_VARARGS */
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#if defined(__GNUC_VA_LIST_COMPATIBILITY) && !defined(__GNUC_VA_LIST) \
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&& !defined(__NO_GNUC_VA_LIST)
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#define __GNUC_VA_LIST
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typedef __va_list __gnuc_va_list; /* compatibility w/GNU headers*/
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#endif
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#endif /* !_MACHINE__TYPES_H_ */
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