From bce5bba7a01fb090f67fec5f79218c505c841af3 Mon Sep 17 00:00:00 2001 From: Bernhard Reutner-Fischer Date: Sat, 19 Jan 2008 15:23:14 +0000 Subject: - add C99 floating point environment, rounding and exception handling functions for i386. UCLIBC_HAS_FENV --- libm/i386/fegetenv.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 libm/i386/fegetenv.c (limited to 'libm/i386/fegetenv.c') diff --git a/libm/i386/fegetenv.c b/libm/i386/fegetenv.c new file mode 100644 index 000000000..abbf179e0 --- /dev/null +++ b/libm/i386/fegetenv.c @@ -0,0 +1,34 @@ +/* Store current floating-point environment. + Copyright (C) 1997,1999,2000,2001,2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 1997. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include + +int +fegetenv (fenv_t *envp) +{ + __asm__ ("fnstenv %0" : "=m" (*envp)); + /* And load it right back since the processor changes the mask. + Intel thought this opcode to be used in interrupt handlers which + would block all exceptions. */ + __asm__ ("fldenv %0" : : "m" (*envp)); + + /* Success. */ + return 0; +} -- cgit v1.2.3