diff options
Diffstat (limited to 'libgcc/config/aarch64/crtfastmath.c')
-rw-r--r-- | libgcc/config/aarch64/crtfastmath.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/libgcc/config/aarch64/crtfastmath.c b/libgcc/config/aarch64/crtfastmath.c new file mode 100644 index 0000000000..3abf48fd33 --- /dev/null +++ b/libgcc/config/aarch64/crtfastmath.c @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2014-2017 Free Software Foundation, Inc. + * + * This file is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 3, or (at your option) any + * later version. + * + * This file 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 + * General Public License for more details. + * + * Under Section 7 of GPL version 3, you are granted additional + * permissions described in the GCC Runtime Library Exception, version + * 3.1, as published by the Free Software Foundation. + * + * You should have received a copy of the GNU General Public License and + * a copy of the GCC Runtime Library Exception along with this program; + * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + * <http://www.gnu.org/licenses/>. + */ + +#define _FPU_FPCR_FZ 0x1000000 + +#define _FPU_SETCW(fpcr) \ + { \ + __asm__ __volatile__ ("msr fpcr, %0" : : "r" (fpcr)); \ + } + +static void __attribute__((constructor)) +set_fast_math (void) +{ + /* Flush to zero, round to nearest, IEEE exceptions disabled. */ + _FPU_SETCW (_FPU_FPCR_FZ); +} |