/* Set current rounding direction.   Copyright (C) 2001, 2005 Free Software Foundation, Inc.   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 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   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <fenv.h>intfesetround (int round){  unsigned short int cw;  int mxcsr;  if ((round & ~0xc00) != 0)    /* ROUND is no valid rounding mode.  */    return 1;  /* First set the x87 FPU.  */  asm ("fnstcw %0" : "=m" (*&cw));  cw &= ~0xc00;  cw |= round;  asm ("fldcw %0" : : "m" (*&cw));  /* And now the MSCSR register for SSE, the precision is at different bit     positions in the different units, we need to shift it 3 bits.  */  asm ("stmxcsr %0" : "=m" (*&mxcsr));  mxcsr &= ~ 0x6000;  mxcsr |= round << 3;  asm ("ldmxcsr %0" : : "m" (*&mxcsr));  return 0;}libm_hidden_def (fesetround)