Annotation of OpenXM_contrib/gmp/mpfr/copysign.c, Revision 1.1
1.1 ! ohara 1: /* mpfr_copysign -- Produce a value with the magnitude of x and sign of y
! 2:
! 3: Copyright 2001, 2002 Free Software Foundation.
! 4:
! 5: This file is part of the MPFR Library.
! 6:
! 7: The MPFR Library is free software; you can redistribute it and/or modify
! 8: it under the terms of the GNU Lesser General Public License as published by
! 9: the Free Software Foundation; either version 2.1 of the License, or (at your
! 10: option) any later version.
! 11:
! 12: The MPFR Library is distributed in the hope that it will be useful, but
! 13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 14: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
! 15: License for more details.
! 16:
! 17: You should have received a copy of the GNU Lesser General Public License
! 18: along with the MPFR Library; see the file COPYING.LIB. If not, write to
! 19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! 20: MA 02111-1307, USA. */
! 21:
! 22: #include "gmp.h"
! 23: #include "gmp-impl.h"
! 24: #include "mpfr.h"
! 25: #include "mpfr-impl.h"
! 26:
! 27: /* The computation of z with magnitude of x and sign of y
! 28:
! 29: z = sign(y) * abs(x)
! 30: */
! 31:
! 32: int
! 33: mpfr_copysign (mpfr_ptr z, mpfr_srcptr x ,mpfr_srcptr y , mp_rnd_t rnd_mode)
! 34: {
! 35: if (MPFR_IS_NAN(y))
! 36: {
! 37: MPFR_SET_NAN(z);
! 38: MPFR_RET_NAN;
! 39: }
! 40: else
! 41: return mpfr_set4(z, x, rnd_mode, MPFR_SIGN(y));
! 42: }
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