/* Set current rounding direction. Copyright (C) 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson , 1997 The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include int fesetround (int round) { unsigned long fpcr; if (round & ~3) return 0; /* Get the current state. */ __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr)); /* Set the relevant bits. */ fpcr = (fpcr & ~(3UL << 58)) | ((unsigned long)round << 58); /* Put the new state in effect. */ __asm__ __volatile__("mt_fpcr %0; excb" : : "f"(fpcr)); return 1; }