diff options
Diffstat (limited to 'ports/sysdeps/am33/fpu/fesetenv.c')
-rw-r--r-- | ports/sysdeps/am33/fpu/fesetenv.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/ports/sysdeps/am33/fpu/fesetenv.c b/ports/sysdeps/am33/fpu/fesetenv.c new file mode 100644 index 0000000000..110c49c9f8 --- /dev/null +++ b/ports/sysdeps/am33/fpu/fesetenv.c @@ -0,0 +1,59 @@ +/* Install given 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, see + <http://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include <shlib-compat.h> + +int +__fesetenv (const fenv_t *envp) +{ + fpu_control_t cw; + + /* We want to clear all EF bits for the default end IEEE. */ + + if (envp == FE_DFL_ENV) + _FPU_SETFCW (_FPU_DEFAULT|FE_ALL_EXCEPT); + else if (envp == FE_NOMASK_ENV) + _FPU_SETFCW (_FPU_IEEE|FE_ALL_EXCEPT); + else + { + fpu_control_t temp; + + _FPU_GETCW (temp); + cw = *envp; + + /* If EF bits are cleared and the user requests them to be set, + we have to fail, because there's no way to do it. */ + if (~temp & cw & FE_ALL_EXCEPT) + return -1; + + /* We clear EF bits by storing a 1 in them, so flip the + FE_ALL_EXCEPT bits. */ + cw = (cw & ~FE_ALL_EXCEPT) | (~cw & FE_ALL_EXCEPT); + _FPU_SETFCW (cw); + } + + /* Success. */ + return 0; +} + +libm_hidden_ver (__fesetenv, fesetenv) +versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2); |