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116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
/* random.c -- Handle seed for random numbers.
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Copyright (C) 2013 INRIA
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This file is part of GNU MPC.
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GNU MPC is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see http://www.gnu.org/licenses/ .
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*/
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#include "mpc-tests.h"
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/* set MPFR flags to random values */
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void
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set_mpfr_flags (int counter)
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{
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if (counter & 1)
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mpfr_set_underflow ();
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else
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mpfr_clear_underflow ();
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if (counter & 2)
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mpfr_set_overflow ();
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else
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mpfr_clear_overflow ();
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/* the divide-by-0 flag was added in MPFR 3.1.0 */
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#ifdef mpfr_set_divby0
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if (counter & 4)
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mpfr_set_divby0 ();
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else
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mpfr_clear_divby0 ();
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#endif
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if (counter & 8)
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mpfr_set_nanflag ();
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else
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mpfr_clear_nanflag ();
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if (counter & 16)
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mpfr_set_inexflag ();
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else
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mpfr_clear_inexflag ();
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if (counter & 32)
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mpfr_set_erangeflag ();
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else
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mpfr_clear_erangeflag ();
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}
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/* Check MPFR flags: we allow that some flags are set internally by MPC,
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for example if MPC does internal computations (using MPFR) which yield
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an overflow, even if the final MPC result fits in the exponent range.
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However we don't allow MPC to *clear* the MPFR flags */
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void
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check_mpfr_flags (int counter)
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{
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int old, neu;
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old = (counter & 1) != 0;
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neu = mpfr_underflow_p () != 0;
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if (old && (neu == 0))
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{
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printf ("Error, underflow flag has been modified from %d to %d\n",
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old, neu);
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exit (1);
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}
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old = (counter & 2) != 0;
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neu = mpfr_overflow_p () != 0;
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if (old && (neu == 0))
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{
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printf ("Error, overflow flag has been modified from %d to %d\n",
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old, neu);
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exit (1);
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}
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#ifdef mpfr_divby0_p
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old = (counter & 4) != 0;
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neu = mpfr_divby0_p () != 0;
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if (old && (neu == 0))
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{
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printf ("Error, divby0 flag has been modified from %d to %d\n",
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old, neu);
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exit (1);
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}
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#endif
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old = (counter & 8) != 0;
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neu = mpfr_nanflag_p () != 0;
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if (old && (neu == 0))
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{
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printf ("Error, nanflag flag has been modified from %d to %d\n",
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old, neu);
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exit (1);
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}
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old = (counter & 16) != 0;
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neu = mpfr_inexflag_p () != 0;
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if (old && (neu == 0))
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{
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printf ("Error, inexflag flag has been modified from %d to %d\n",
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old, neu);
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exit (1);
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}
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old = (counter & 32) != 0;
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neu = mpfr_erangeflag_p () != 0;
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if (old && (neu == 0))
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{
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printf ("Error, erangeflag flag has been modified from %d to %d\n",
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old, neu);
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exit (1);
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}
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}
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