diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/e500/nofpu/fesetmode.c')
-rw-r--r-- | sysdeps/powerpc/powerpc32/e500/nofpu/fesetmode.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/fesetmode.c b/sysdeps/powerpc/powerpc32/e500/nofpu/fesetmode.c new file mode 100644 index 0000000000..6c97316f59 --- /dev/null +++ b/sysdeps/powerpc/powerpc32/e500/nofpu/fesetmode.c @@ -0,0 +1,43 @@ +/* Install given floating-point control modes. e500 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 <sysdep.h> +#include <sys/prctl.h> + +#define SPEFSCR_STATUS 0xff3eff00 + +int +fesetmode (const femode_t *modep) +{ + fenv_union_t u; + INTERNAL_SYSCALL_DECL (err); + int r; + + u.fenv = *modep; + unsigned int spefscr = fegetenv_register (); + spefscr = (spefscr & SPEFSCR_STATUS) | (u.l[1] & ~SPEFSCR_STATUS); + + fesetenv_register (spefscr); + r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, + u.l[0] | PR_FP_EXC_SW_ENABLE); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + return -1; + + return 0; +} |