glibc/sysdeps/i386/fpu/s_floor.c

/* Return smallest integral value not less than argument.  i386 version.
   Copyright (C) 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-double.h>

#define FUNC       __floor
#define TYPE       double
#define FE_OPTION  FE_DOWNWARD
#include "s_nearestint_387_template.c"
libm_alias_double (__floor, floor)
math: x86 floor traps when FE_INEXACT is enabled (BZ 31601) The implementations of floor functions using x87 floating point (i386 and 86_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> 2024-04-03 19:39:18 +00:00			`/* Return smallest integral value not less than argument. i386 version.`
			`Copyright (C) 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-double.h>`

			`#define FUNC __floor`
			`#define TYPE double`
			`#define FE_OPTION FE_DOWNWARD`
			`#include "s_nearestint_387_template.c"`
			`libm_alias_double (__floor, floor)`