/* Manipulating the FPU control word.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2011 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2007.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef _FPUCW_H
#define _FPUCW_H
*/
/* Inline assembler like this works only with GNU C. */
-#if defined __i386__ && defined __GNUC__
+#if (defined __i386__ || defined __x86_64__) && defined __GNUC__
typedef unsigned short fpucw_t; /* glibc calls this fpu_control_t */
# define FPU_PC_EXTENDED 0x300 /* glibc calls this _FPU_EXTENDED */
# define GET_FPUCW() \
- ({ fpucw_t _cw; \
- __asm__ __volatile__ ("fnstcw %0" : "=m" (*&_cw)); \
- _cw; \
+ ({ fpucw_t _cw; \
+ __asm__ __volatile__ ("fnstcw %0" : "=m" (*&_cw)); \
+ _cw; \
})
# define SET_FPUCW(word) \
- (void)({ fpucw_t _ncw = (word); \
- __asm__ __volatile__ ("fldcw %0" : : "m" (*&_ncw)); \
+ (void)({ fpucw_t _ncw = (word); \
+ __asm__ __volatile__ ("fldcw %0" : : "m" (*&_ncw)); \
})
# define DECL_LONG_DOUBLE_ROUNDING \
fpucw_t oldcw;
# define BEGIN_LONG_DOUBLE_ROUNDING() \
- (void)(oldcw = GET_FPUCW (), \
+ (void)(oldcw = GET_FPUCW (), \
SET_FPUCW ((oldcw & ~FPU_PC_MASK) | FPU_PC_EXTENDED))
# define END_LONG_DOUBLE_ROUNDING() \
SET_FPUCW (oldcw)