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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-04-03 16:39:19 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-04-04 14:29:28 -0300 |
| commit | 44ccc2465c6af5bd811d8258bf744aaafd5392fc (patch) | |
| tree | 3332a0e1abbcdb99c685166da356357ff1076327 /sysdeps/x86_64 | |
| parent | 932544efa469568525455bcb53d4eabeba0eb295 (diff) | |
| download | glibc-44ccc2465c6af5bd811d8258bf744aaafd5392fc.zip glibc-44ccc2465c6af5bd811d8258bf744aaafd5392fc.tar.gz glibc-44ccc2465c6af5bd811d8258bf744aaafd5392fc.tar.bz2 | |
math: x86 trunc traps when FE_INEXACT is enabled (BZ 31603)
The implementations of trunc functions using x87 floating point (i386 and
x86_64 long double only) traps when FE_INEXACT is enabled. Although
this is a GNU extension outside the scope of the C standard, other
architectures that also support traps do not show this behavior.
The fix moves the implementation to a common one that holds any
exceptions with a 'fnclex' (libc_feholdexcept_setround_387).
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/fpu/s_truncl.S | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/sysdeps/x86_64/fpu/s_truncl.S b/sysdeps/x86_64/fpu/s_truncl.S deleted file mode 100644 index e3d64a8..0000000 --- a/sysdeps/x86_64/fpu/s_truncl.S +++ /dev/null @@ -1,36 +0,0 @@ -/* Truncate long double value. - Copyright (C) 1997-2024 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <https://www.gnu.org/licenses/>. */ - -#include <libm-alias-ldouble.h> -#include <machine/asm.h> - -ENTRY(__truncl) - fldt 8(%rsp) - fnstenv -28(%rsp) - movl $0xc00, %edx - orl -28(%rsp), %edx - movl %edx, -32(%rsp) - fldcw -32(%rsp) - frndint - fnstsw - andl $0x1, %eax - orl %eax, -24(%rsp) - fldenv -28(%rsp) - ret -END(__truncl) -libm_alias_ldouble (__trunc, trunc) |