From e7bcf43b6440ac9fc61a0eef5591393810daafb5 Mon Sep 17 00:00:00 2001 From: Joakim Tjernlund Date: Sat, 31 Mar 2007 13:28:15 +0000 Subject: From Steve Papacharalambous: Add math support for PowerPC e500. --- libm/powerpc/e500/fpu/feupdateenv.c | 49 +++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 libm/powerpc/e500/fpu/feupdateenv.c (limited to 'libm/powerpc/e500/fpu/feupdateenv.c') diff --git a/libm/powerpc/e500/fpu/feupdateenv.c b/libm/powerpc/e500/fpu/feupdateenv.c new file mode 100644 index 000000000..03f3af8d9 --- /dev/null +++ b/libm/powerpc/e500/fpu/feupdateenv.c @@ -0,0 +1,49 @@ +/* Install given floating-point environment and raise exceptions. + Copyright (C) 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Aldy Hernandez , 2004. + + 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 "fenv_libc.h" +#include +#include + +int +__feupdateenv (const fenv_t *envp) +{ + unsigned long fpescr, old, new, pflags; + fenv_union_t u; + INTERNAL_SYSCALL_DECL (err); + + /* Save the currently set exceptions. */ + u.fenv = *envp; + new = u.l[1]; + old = fegetenv_register (); + new |= (old & FE_ALL_EXCEPT); + + INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags); + pflags |= u.l[0]; + INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, pflags); + + /* Enable and raise (if appropriate) exceptions set in `new'. */ + fesetenv_register (new); + feraiseexcept (new & FE_ALL_EXCEPT); + + /* Success. */ + return 0; +} + -- cgit v1.2.3