1/* mpfr_min -- min and max of x, y 2 3Copyright 2001, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. 4Contributed by the AriC and Caramel projects, INRIA. 5 6This file is part of the GNU MPFR Library. 7 8The GNU MPFR Library is free software; you can redistribute it and/or modify 9it under the terms of the GNU Lesser General Public License as published by 10the Free Software Foundation; either version 3 of the License, or (at your 11option) any later version. 12 13The GNU MPFR Library is distributed in the hope that it will be useful, but 14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16License for more details. 17 18You should have received a copy of the GNU Lesser General Public License 19along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see 20http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23 24#include "mpfr-impl.h" 25 26 /* The computation of z=min(x,y) 27 28 z=x if x <= y 29 z=y if x > y 30 */ 31 32int 33mpfr_min (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, mpfr_rnd_t rnd_mode) 34{ 35 if (MPFR_ARE_SINGULAR(x,y)) 36 { 37 if (MPFR_IS_NAN(x) && MPFR_IS_NAN(y) ) 38 { 39 MPFR_SET_NAN(z); 40 MPFR_RET_NAN; 41 } 42 else if (MPFR_IS_NAN(x)) 43 return mpfr_set(z, y, rnd_mode); 44 else if (MPFR_IS_NAN(y)) 45 return mpfr_set(z, x, rnd_mode); 46 else if (MPFR_IS_ZERO(x) && MPFR_IS_ZERO(y)) 47 { 48 if (MPFR_IS_NEG(x)) 49 return mpfr_set(z, x, rnd_mode); 50 else 51 return mpfr_set(z, y, rnd_mode); 52 } 53 } 54 if (mpfr_cmp(x,y) <= 0) 55 return mpfr_set(z, x, rnd_mode); 56 else 57 return mpfr_set(z, y, rnd_mode); 58} 59 60 /* The computation of z=max(x,y) 61 62 z=x if x >= y 63 z=y if x < y 64 */ 65 66int 67mpfr_max (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, mpfr_rnd_t rnd_mode) 68{ 69 if (MPFR_ARE_SINGULAR(x,y)) 70 { 71 if (MPFR_IS_NAN(x) && MPFR_IS_NAN(y) ) 72 { 73 MPFR_SET_NAN(z); 74 MPFR_RET_NAN; 75 } 76 else if (MPFR_IS_NAN(x)) 77 return mpfr_set(z, y, rnd_mode); 78 else if (MPFR_IS_NAN(y)) 79 return mpfr_set(z, x, rnd_mode); 80 else if (MPFR_IS_ZERO(x) && MPFR_IS_ZERO(y)) 81 { 82 if (MPFR_IS_NEG(x)) 83 return mpfr_set(z, y, rnd_mode); 84 else 85 return mpfr_set(z, x, rnd_mode); 86 } 87 } 88 if (mpfr_cmp(x,y) <= 0) 89 return mpfr_set(z, y, rnd_mode); 90 else 91 return mpfr_set(z, x, rnd_mode); 92} 93