1/* Set current rounding direction. 2 Copyright (C) 1997 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, write to the Free 18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 19 02111-1307 USA. */ 20 21#include <fenv.h> 22 23int 24fesetround (int round) 25{ 26 fexcept_t fpcr; 27 28 if (round & ~FE_UPWARD) 29 /* ROUND is no valid rounding mode. */ 30 return 1; 31 32 __asm__ ("fmove%.l %!,%0" : "=dm" (fpcr)); 33 fpcr &= ~FE_UPWARD; 34 fpcr |= round; 35 __asm__ __volatile__ ("fmove%.l %0,%!" : : "dm" (fpcr)); 36 37 return 0; 38} 39