diff options
Diffstat (limited to 'ports/sysdeps/arm/fesetround.c')
| -rw-r--r-- | ports/sysdeps/arm/fesetround.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/ports/sysdeps/arm/fesetround.c b/ports/sysdeps/arm/fesetround.c new file mode 100644 index 0000000000..997bd98f5a --- /dev/null +++ b/ports/sysdeps/arm/fesetround.c @@ -0,0 +1,56 @@ +/* Set current rounding direction. + Copyright (C) 2004, 2005 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 <unistd.h> +#include <ldsodefs.h> +#include <dl-procinfo.h> +#include <sysdep.h> + +int +fesetround (int round) +{ + if (GLRO (dl_hwcap) & HWCAP_ARM_VFP) + { + fpu_control_t temp; + + switch (round) + { + case FE_TONEAREST: + case FE_UPWARD: + case FE_DOWNWARD: + case FE_TOWARDZERO: + _FPU_GETCW (temp); + temp = (temp & ~FE_TOWARDZERO) | round; + _FPU_SETCW (temp); + return 0; + default: + return 1; + } + } + else if (round == FE_TONEAREST) + /* This is the only supported rounding mode for soft-fp. */ + return 0; + + /* Unsupported, so fail. */ + return 1; +} + +libm_hidden_def (fesetround) |