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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/powerpc/bits/fenvinline.h
1 /* Inline floating-point environment handling functions for powerpc.
2 Copyright (C) 1995-2019 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, see
17 <https://www.gnu.org/licenses/>. */
19 #if defined __GNUC__ && !defined _SOFT_FLOAT && !defined __NO_FPRS__
21 /* Inline definitions for fegetround. */
22 # define __fegetround_ISA300() \
24 union { double __d; unsigned long long __ll; } __u; \
25 __asm__ __volatile__ ( \
26 ".machine push; .machine \"power9\"; mffsl %0; .machine pop" \
28 __u.__ll & 0x0000000000000003LL; \
31 # define __fegetround_ISA2() \
33 int __fegetround_result; \
34 __asm__ __volatile__ ("mcrfs 7,7 ; mfcr %0" \
35 : "=r"(__fegetround_result) : : "cr7"); \
36 __fegetround_result & 3; \
40 # define __fegetround() __fegetround_ISA300()
41 # elif defined __BUILTIN_CPU_SUPPORTS__
42 # define __fegetround() \
43 (__glibc_likely (__builtin_cpu_supports ("arch_3_00")) \
44 ? __fegetround_ISA300() \
45 : __fegetround_ISA2() \
48 # define __fegetround() __fegetround_ISA2()
51 # define fegetround() __fegetround ()
53 # ifndef __NO_MATH_INLINES
54 /* The weird 'i#*X' constraints on the following suppress a gcc
55 warning when __excepts is not a constant. Otherwise, they mean the
56 same as just plain 'i'. */
58 # if __GNUC_PREREQ(3, 4)
60 /* Inline definition for feraiseexcept. */
61 # define feraiseexcept(__excepts) \
63 int __e = __excepts; \
65 if (__builtin_constant_p (__e) \
66 && (__e & (__e - 1)) == 0 \
67 && __e != FE_INVALID) \
70 __asm__ __volatile__ ("mtfsb1 %0" \
71 : : "i#*X" (__builtin_clz (__e))); \
75 __ret = feraiseexcept (__e); \
79 /* Inline definition for feclearexcept. */
80 # define feclearexcept(__excepts) \
82 int __e = __excepts; \
84 if (__builtin_constant_p (__e) \
85 && (__e & (__e - 1)) == 0 \
86 && __e != FE_INVALID) \
89 __asm__ __volatile__ ("mtfsb0 %0" \
90 : : "i#*X" (__builtin_clz (__e))); \
94 __ret = feclearexcept (__e); \
98 # endif /* __GNUC_PREREQ(3, 4). */
100 # endif /* !__NO_MATH_INLINES. */
102 #endif /* __GNUC__ && !_SOFT_FLOAT && !__NO_FPRS__ */