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/feenablxcpt.c | 60 +++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 libm/powerpc/e500/fpu/feenablxcpt.c (limited to 'libm/powerpc/e500/fpu/feenablxcpt.c') diff --git a/libm/powerpc/e500/fpu/feenablxcpt.c b/libm/powerpc/e500/fpu/feenablxcpt.c new file mode 100644 index 000000000..4f00a918d --- /dev/null +++ b/libm/powerpc/e500/fpu/feenablxcpt.c @@ -0,0 +1,60 @@ +/* Enable floating-point 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 +feenableexcept (int excepts) +{ + unsigned int result = 0, pflags, r; + INTERNAL_SYSCALL_DECL (err); + + INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags); + + /* Save old enable bits. */ + if (pflags & PR_FP_EXC_OVF) + result |= FE_OVERFLOW; + if (pflags & PR_FP_EXC_UND) + result |= FE_UNDERFLOW; + if (pflags & PR_FP_EXC_INV) + result |= FE_INVALID; + if (pflags & PR_FP_EXC_DIV) + result |= FE_DIVBYZERO; + if (pflags & PR_FP_EXC_RES) + result |= FE_INEXACT; + + if (excepts & FE_INEXACT) + pflags |= PR_FP_EXC_RES; + if (excepts & FE_DIVBYZERO) + pflags |= PR_FP_EXC_DIV; + if (excepts & FE_UNDERFLOW) + pflags |= PR_FP_EXC_UND; + if (excepts & FE_OVERFLOW) + pflags |= PR_FP_EXC_OVF; + if (excepts & FE_INVALID) + pflags |= PR_FP_EXC_INV; + r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, pflags); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + return -1; + + return result; +} -- cgit v1.2.3