1 /* Set floating-point environment exception handling.
2 Copyright (C) 1997-2023 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 #include <fenv_libc.h>
22 __fesetexceptflag (const fexcept_t
*flagp
, int excepts
)
27 /* Get the current state. */
28 u
.fenv
= fegetenv_register ();
30 /* Ignore exceptions not listed in 'excepts'. */
31 flag
= *flagp
& excepts
;
33 /* Replace the exception status */
34 int excepts_mask
= FPSCR_STICKY_BITS
& excepts
;
35 if ((excepts
& FE_INVALID
) != 0)
36 excepts_mask
|= FE_ALL_INVALID
;
37 n
.l
= ((u
.l
& ~excepts_mask
)
38 | (flag
& FPSCR_STICKY_BITS
)
39 /* Turn FE_INVALID into FE_INVALID_SOFTWARE. */
40 | (flag
>> ((31 - FPSCR_VX
) - (31 - FPSCR_VXSOFT
))
41 & FE_INVALID_SOFTWARE
));
43 /* Store the new status word (along with the rest of the environment).
44 This may cause floating-point exceptions if the restored state
47 fesetenv_register (n
.fenv
);
49 /* Deal with FE_INVALID_SOFTWARE not being implemented on some chips. */
50 if (flag
& FE_INVALID
)
51 feraiseexcept(FE_INVALID
);
57 #include <shlib-compat.h>
58 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
59 strong_alias (__fesetexceptflag
, __old_fesetexceptflag
)
60 compat_symbol (libm
, __old_fesetexceptflag
, fesetexceptflag
, GLIBC_2_1
);
63 versioned_symbol (libm
, __fesetexceptflag
, fesetexceptflag
, GLIBC_2_2
);