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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/i386/fpu/s_truncf.S | |
| parent | 932544efa469568525455bcb53d4eabeba0eb295 (diff) | |
| download | glibc-44ccc2465c6af5bd811d8258bf744aaafd5392fc.tar.gz glibc-44ccc2465c6af5bd811d8258bf744aaafd5392fc.tar.xz glibc-44ccc2465c6af5bd811d8258bf744aaafd5392fc.zip | |
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/i386/fpu/s_truncf.S')
| -rw-r--r-- | sysdeps/i386/fpu/s_truncf.S | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/sysdeps/i386/fpu/s_truncf.S b/sysdeps/i386/fpu/s_truncf.S deleted file mode 100644 index 0b26e09d61..0000000000 --- a/sysdeps/i386/fpu/s_truncf.S +++ /dev/null @@ -1,37 +0,0 @@ -/* Truncate float 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 <machine/asm.h> -#include <libm-alias-float.h> - -ENTRY(__truncf) - flds 4(%esp) - subl $32, %esp - cfi_adjust_cfa_offset (32) - fnstenv 4(%esp) - movl $0xc00, %edx - orl 4(%esp), %edx - movl %edx, (%esp) - fldcw (%esp) - frndint - fldenv 4(%esp) - addl $32, %esp - cfi_adjust_cfa_offset (-32) - ret -END(__truncf) -libm_alias_float (__trunc, trunc) |