diff options
Diffstat (limited to 'REORG.TODO/sysdeps/arm/setfpucw.c')
-rw-r--r-- | REORG.TODO/sysdeps/arm/setfpucw.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/arm/setfpucw.c b/REORG.TODO/sysdeps/arm/setfpucw.c new file mode 100644 index 0000000000..e6c075e620 --- /dev/null +++ b/REORG.TODO/sysdeps/arm/setfpucw.c @@ -0,0 +1,43 @@ +/* Set the FPU control word. + Copyright (C) 1996-2017 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 <math.h> +#include <fpu_control.h> +#include <arm-features.h> + + +void +__setfpucw (fpu_control_t set) +{ + fpu_control_t fpscr, new_fpscr; + + /* Do nothing if a VFP unit isn't present. */ + if (!ARM_HAVE_VFP) + return; + + _FPU_GETCW (fpscr); + + /* Preserve the reserved bits, and set the rest as the user + specified (or the default, if the user gave zero). */ + new_fpscr = fpscr & _FPU_RESERVED; + new_fpscr |= set & ~_FPU_RESERVED; + + /* Write FPSCR if changed. */ + if (new_fpscr != fpscr) + _FPU_SETCW (fpscr); +} |