diff options
Diffstat (limited to 'gcc-4.9/libgcc/config/sparc/crtfastmath.c')
-rw-r--r-- | gcc-4.9/libgcc/config/sparc/crtfastmath.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/sparc/crtfastmath.c b/gcc-4.9/libgcc/config/sparc/crtfastmath.c new file mode 100644 index 000000000..2bc2fb5b4 --- /dev/null +++ b/gcc-4.9/libgcc/config/sparc/crtfastmath.c @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2001-2014 Free Software Foundation, Inc. + * Contributed by David S. Miller (davem@redhat.com) + * + * 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 FPRS_NS (1 << 22) /* Non-Standard fpu results */ + +static void __attribute__((constructor)) +set_fast_math (void) +{ + unsigned int fsr; + + /* This works for the 64-bit case because, even if 32-bit ld/st of + the fsr register modified the upper 32-bit, the only thing up there + are the 3 other condition codes which are "do not care" at the time + that this runs. */ + + __asm__("st %%fsr, %0" + : "=m" (fsr)); + + fsr |= FPRS_NS; + + __asm__("ld %0, %%fsr" + : : "m" (fsr)); +} |