vfs: check userland buffers before reading them.
[haiku.git] / src / system / libroot / posix / glibc / include / arch / ppc / bits / fenvinline.h
blob552c8c9db7d4e20d55c804008fc8ba2edbbe0f86
1 /* Inline floating-point environment handling functions for powerpc.
2 Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #if defined __GNUC__ && !defined _SOFT_FLOAT && !defined __NO_MATH_INLINES
22 /* Inline definition for fegetround. */
23 # define fegetround() \
24 (__extension__ ({ int __fegetround_result; \
25 __asm__ ("mcrfs 7,7 ; mfcr %0" \
26 : "=r"(__fegetround_result) : : "cr7"); \
27 __fegetround_result & 3; }))
29 /* The weird 'i#*X' constraints on the following suppress a gcc
30 warning when __excepts is not a constant. Otherwise, they mean the
31 same as just plain 'i'. */
33 /* Inline definition for feraiseexcept. */
34 # define feraiseexcept(__excepts) \
35 ((__builtin_constant_p (__excepts) \
36 && ((__excepts) & ((__excepts)-1)) == 0 \
37 && (__excepts) != FE_INVALID) \
38 ? ((__excepts) != 0 \
39 ? (__extension__ ({ __asm__ __volatile__ \
40 ("mtfsb1 %s0" \
41 : : "i#*X"(__builtin_ffs (__excepts))); \
42 0; })) \
43 : 0) \
44 : (feraiseexcept) (__excepts))
46 /* Inline definition for feclearexcept. */
47 # define feclearexcept(__excepts) \
48 ((__builtin_constant_p (__excepts) \
49 && ((__excepts) & ((__excepts)-1)) == 0 \
50 && (__excepts) != FE_INVALID) \
51 ? ((__excepts) != 0 \
52 ? (__extension__ ({ __asm__ __volatile__ \
53 ("mtfsb0 %s0" \
54 : : "i#*X"(__builtin_ffs (__excepts))); \
55 0; })) \
56 : 0) \
57 : (feclearexcept) (__excepts))
59 #endif /* __GNUC__ && !_SOFT_FLOAT */