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Peter Bergner <bergner@us.ibm.com> * sysdeps/powerpc/bits/fenv.h: Declare __fe_mask_env extern. Define FE_NOMASK_ENV as FE_EANBLED_ENV. Define FE_MASK_ENV. * sysdeps/powerpc/fpu/Makefile: Add fe_mask to libm-support. * sysdeps/powerpc/fpu/fe_mask.c: New file. * sysdeps/powerpc/fpu/fe_nomask.c: Correct comment. * sysdeps/powerpc/fpu/fedisblxcpt.c (fedisableexcept): Call __fe_mask_env() if all FP exceptions disabled. * sysdeps/powerpc/fpu/feholdexcpt.c (feholdexcept): Copy high 32-bits from old FPSCR to new fenv to propagate DFP rounding modes. Call __fe_mask_env() if FP exceptions previously enabled. * sysdeps/powerpc/fpu/fesetenv.c (fesetenv): Change mask to merge exceptions from env. Use __fe_nomask_env() or __fe_mask_env() when transitioning from all exceptions disabled to any exception enabled or visa versa. * sysdeps/powerpc/fpu/feupdateenv.c (__feupdateenv): Change mask to merge exceptions from env. Call __fe_nomask_env or __fe_mask_env when transitioning from all exceptions disabled to any exception enabled or visa versa. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fe_nomask.c: Moved to... * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_nomask.c: ...here. * sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c: Moved to... * sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_nomask.c: ...here. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_mask.c: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_mask.c: New file.
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* Disable floating-point exceptions.
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Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Geoffrey Keating <geoffk@geoffk.org>, 2000.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <fenv_libc.h>
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int
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fedisableexcept (int excepts)
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{
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fenv_union_t fe;
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int result, new;
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result = fegetexcept ();
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if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
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excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
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fe.fenv = fegetenv_register ();
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if (excepts & FE_INEXACT)
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fe.l[1] &= ~(1 << (31 - FPSCR_XE));
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if (excepts & FE_DIVBYZERO)
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fe.l[1] &= ~(1 << (31 - FPSCR_ZE));
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if (excepts & FE_UNDERFLOW)
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fe.l[1] &= ~(1 << (31 - FPSCR_UE));
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if (excepts & FE_OVERFLOW)
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fe.l[1] &= ~(1 << (31 - FPSCR_OE));
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if (excepts & FE_INVALID)
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fe.l[1] &= ~(1 << (31 - FPSCR_VE));
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fesetenv_register (fe.fenv);
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new = fegetexcept ();
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if (new == 0 && result != 0)
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(void)__fe_mask_env ();
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if ((new & excepts) != 0)
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result = -1;
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return result;
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}
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