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d7a568af55
fesetenv_mode is used variously to write the FPSCR exception enable bits and rounding mode bits. These are referred to as the control bits in the POWER ISA. Change the name to be reflective of its current and expected use, and match up well with fegetenv_control.
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Disable floating-point exceptions.
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Copyright (C) 2000-2019 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, see
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<https://www.gnu.org/licenses/>. */
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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, curr;
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int result, new;
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/* Get current exception mask to return. */
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fe.fenv = curr.fenv = fegetenv_control ();
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result = fenv_reg_to_exceptions (fe.l);
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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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new = fenv_exceptions_to_reg (excepts);
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if (fenv_reg_to_exceptions (new) != excepts)
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return -1;
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/* Sets the new exception mask. */
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fe.l &= ~new;
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if (fe.l != curr.l)
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fesetenv_control (fe.fenv);
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__TEST_AND_ENTER_NON_STOP (-1ULL, fe.l);
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return result;
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}
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