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author | Joseph Myers <joseph@codesourcery.com> | 2016-09-07 16:46:47 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2016-09-07 16:46:47 +0000 |
commit | 9969e62e74cde7a78de10c220aeed200f8c93686 (patch) | |
tree | ce10a204cc4e92e4a3dbf26ffbdb30a14307e324 /sysdeps/powerpc/fpu/fesetmode.c | |
parent | 997290d9142877a3518422bde15d1ff52e8edf0a (diff) | |
download | glibc-9969e62e74cde7a78de10c220aeed200f8c93686.tar.gz glibc-9969e62e74cde7a78de10c220aeed200f8c93686.tar.xz glibc-9969e62e74cde7a78de10c220aeed200f8c93686.zip |
Add femode_t functions: powerpc.
This patch adds PowerPC versions of fegetmode and fesetmode. * sysdeps/powerpc/fpu/fegetmode.c: New file. * sysdeps/powerpc/fpu/fesetmode.c: Likewise. * sysdeps/powerpc/nofpu/fegetmode.c: Likewise. * sysdeps/powerpc/nofpu/fesetmode.c: Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/fegetmode.c: Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/fesetmode.c: Likewise.
Diffstat (limited to 'sysdeps/powerpc/fpu/fesetmode.c')
-rw-r--r-- | sysdeps/powerpc/fpu/fesetmode.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/powerpc/fpu/fesetmode.c b/sysdeps/powerpc/fpu/fesetmode.c new file mode 100644 index 0000000000..ec6d11c775 --- /dev/null +++ b/sysdeps/powerpc/fpu/fesetmode.c @@ -0,0 +1,49 @@ +/* Install given floating-point control modes. PowerPC version. + Copyright (C) 2016 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_libc.h> +#include <fpu_control.h> + +#define _FPU_MASK_ALL (_FPU_MASK_ZM | _FPU_MASK_OM | _FPU_MASK_UM \ + | _FPU_MASK_XM | _FPU_MASK_IM) + +#define FPU_STATUS 0xbffff700ULL + +int +fesetmode (const femode_t *modep) +{ + fenv_union_t old, new; + + /* Logic regarding enabled exceptions as in fesetenv. */ + + new.fenv = *modep; + old.fenv = fegetenv_register (); + new.l = (new.l & ~FPU_STATUS) | (old.l & FPU_STATUS); + + if (old.l == new.l) + return 0; + + if ((old.l & _FPU_MASK_ALL) == 0 && (new.l & _FPU_MASK_ALL) != 0) + (void) __fe_nomask_env_priv (); + + if ((old.l & _FPU_MASK_ALL) != 0 && (new.l & _FPU_MASK_ALL) == 0) + (void) __fe_mask_env (); + + fesetenv_register (new.fenv); + return 0; +} |