diff options
Diffstat (limited to 'sysdeps/arm/fesetenv.c')
-rw-r--r-- | sysdeps/arm/fesetenv.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/sysdeps/arm/fesetenv.c b/sysdeps/arm/fesetenv.c new file mode 100644 index 0000000000..af4f25d47d --- /dev/null +++ b/sysdeps/arm/fesetenv.c @@ -0,0 +1,63 @@ +/* Install given floating-point environment. + Copyright (C) 2004-2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 <arm-features.h> + + +int +__fesetenv (const fenv_t *envp) +{ + if (ARM_HAVE_VFP) + { + unsigned int temp; + + _FPU_GETCW (temp); + temp &= _FPU_RESERVED; + + if (envp == FE_DFL_ENV) + temp |= _FPU_DEFAULT; + else if (envp == FE_NOMASK_ENV) + temp |= _FPU_IEEE; + else + temp |= envp->__cw & ~_FPU_RESERVED; + + _FPU_SETCW (temp); + + if (envp == FE_NOMASK_ENV) + { + /* VFPv3 and VFPv4 do not support trapping exceptions, so + test whether the relevant bits were set and fail if + not. */ + _FPU_GETCW (temp); + if ((temp & _FPU_IEEE) != _FPU_IEEE) + return 1; + } + + /* Success. */ + return 0; + } + + /* Unsupported, so fail. */ + return 1; +} + +#include <shlib-compat.h> +libm_hidden_ver (__fesetenv, fesetenv) +versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2); |