diff options
Diffstat (limited to 'ports/sysdeps/am33/fpu/fclrexcpt.c')
-rw-r--r-- | ports/sysdeps/am33/fpu/fclrexcpt.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/ports/sysdeps/am33/fpu/fclrexcpt.c b/ports/sysdeps/am33/fpu/fclrexcpt.c new file mode 100644 index 000000000..0c98b4ea9 --- /dev/null +++ b/ports/sysdeps/am33/fpu/fclrexcpt.c @@ -0,0 +1,52 @@ +/* Clear given exceptions in current floating-point environment. + Copyright (C) 1998, 1999, 2000, 2002, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Alexandre Oliva <aoliva@redhat.com> + based on corresponding file in the MIPS port. + + 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.h> +#include <fenv_libc.h> +#include <fpu_control.h> +#include <shlib-compat.h> + +int +__feclearexcept (int excepts) +{ + fpu_control_t cw; + + /* Mask out unsupported bits/exceptions. */ + excepts &= FE_ALL_EXCEPT; + + /* Read the complete control word. */ + _FPU_GETCW (cw); + + /* Clear exception flag bits and cause bits. EF bits are cleared by + assigning 1 to them (and there's no way to set them); other bits + are copied normally. */ + + cw &= ~((excepts << CAUSE_SHIFT) | FE_ALL_EXCEPT); + cw |= excepts; + + /* Put the new data in effect. */ + _FPU_SETFCW (cw); + + /* Success. */ + return 0; +} + +versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2); |