diff options
Diffstat (limited to 'lib/fpucw.h')
| -rw-r--r-- | lib/fpucw.h | 35 |
1 files changed, 13 insertions, 22 deletions
diff --git a/lib/fpucw.h b/lib/fpucw.h index 3dedca5c..19218366 100644 --- a/lib/fpucw.h +++ b/lib/fpucw.h @@ -1,27 +1,18 @@ /* Manipulating the FPU control word. -*- coding: utf-8 -*- - Copyright (C) 2007-2018 Free Software Foundation, Inc. + Copyright (C) 2007-2022 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 2007. - This program is free software: you can redistribute it and/or - modify it under the terms of either: + This file 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 Lesser General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at your - option) any later version. - - or - - * the GNU General Public License as published by the Free - Software Foundation; either version 2 of the License, or (at your - option) any later version. - - or both in parallel, as here. - This program is distributed in the hope that it will be useful, + This file 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 General Public License for more details. + GNU Lesser General Public License for more details. - You should have received a copy of the GNU General Public License + You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #ifndef _FPUCW_H @@ -52,7 +43,7 @@ See Vincent Lefèvre's page https://www.vinc17.net/research/extended.en.html for a good explanation. - See http://www.uwsg.iu.edu/hypermail/linux/kernel/0103.0/0453.html for + See https://web.archive.org/web/20060905133417/http://www.uwsg.iu.edu/hypermail/linux/kernel/0103.0/0453.html some argumentation which setting should be the default. */ /* This header file provides the following facilities: @@ -70,8 +61,8 @@ 'long double' safe operation precision */ -/* Inline assembler like this works only with GNU C. */ -#if (defined __i386__ || defined __x86_64__) && defined __GNUC__ +/* Inline assembler like this works only with GNU C and clang. */ +#if (defined __i386__ || defined __x86_64__) && (defined __GNUC__ || defined __clang__) typedef unsigned short fpucw_t; /* glibc calls this fpu_control_t */ @@ -79,12 +70,12 @@ typedef unsigned short fpucw_t; /* glibc calls this fpu_control_t */ # define FPU_PC_DOUBLE 0x200 /* glibc calls this _FPU_DOUBLE */ # define FPU_PC_EXTENDED 0x300 /* glibc calls this _FPU_EXTENDED */ -# define GET_FPUCW() \ +# define GET_FPUCW() __extension__ \ ({ fpucw_t _cw; \ __asm__ __volatile__ ("fnstcw %0" : "=m" (*&_cw)); \ _cw; \ }) -# define SET_FPUCW(word) \ +# define SET_FPUCW(word) __extension__ \ (void)({ fpucw_t _ncw = (word); \ __asm__ __volatile__ ("fldcw %0" : : "m" (*&_ncw)); \ }) |