diff options
Diffstat (limited to 'REORG.TODO/sysdeps/powerpc/powerpc32/e500/nofpu/feholdexcpt.c')
-rw-r--r-- | REORG.TODO/sysdeps/powerpc/powerpc32/e500/nofpu/feholdexcpt.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/powerpc/powerpc32/e500/nofpu/feholdexcpt.c b/REORG.TODO/sysdeps/powerpc/powerpc32/e500/nofpu/feholdexcpt.c new file mode 100644 index 0000000000..cba1239561 --- /dev/null +++ b/REORG.TODO/sysdeps/powerpc/powerpc32/e500/nofpu/feholdexcpt.c @@ -0,0 +1,59 @@ +/* Store current floating-point environment and clear exceptions. + e500 version. + Copyright (C) 2004-2017 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 <fenv_libc.h> +#include <sysdep.h> +#include <sys/prctl.h> + +int +__feholdexcept (fenv_t *envp) +{ + fenv_union_t u; + INTERNAL_SYSCALL_DECL (err); + int r; + + /* Get the current state. */ + r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &u.l[0]); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + return -1; + + u.l[1] = fegetenv_register (); + *envp = u.fenv; + + /* Clear everything except for the rounding mode and trapping to the + kernel. */ + u.l[0] &= ~(PR_FP_EXC_DIV + | PR_FP_EXC_OVF + | PR_FP_EXC_UND + | PR_FP_EXC_RES + | PR_FP_EXC_INV); + u.l[1] &= SPEFSCR_FRMC | (SPEFSCR_ALL_EXCEPT_ENABLE & ~SPEFSCR_FINXE); + + /* Put the new state in effect. */ + fesetenv_register (u.l[1]); + 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; +} +libm_hidden_def (__feholdexcept) +weak_alias (__feholdexcept, feholdexcept) +libm_hidden_weak (feholdexcept) |