/* Set FP exception mask and rounding mode.  Mach/Alpha version.   Copyright (C) 2002 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 <fpu_control.h>#define FPCR_DYN_SHIFT	58		/* first dynamic rounding mode bit */#define FPCR_DYN_CHOPPED (0x0UL << FPCR_DYN_SHIFT)	/* towards 0 */#define FPCR_DYN_MINUS	 (0x1UL << FPCR_DYN_SHIFT)	/* towards -INF */#define FPCR_DYN_NORMAL	 (0x2UL << FPCR_DYN_SHIFT)	/* towards nearest */#define FPCR_DYN_PLUS	 (0x3UL << FPCR_DYN_SHIFT)	/* towards +INF */#define FPCR_DYN_MASK	 (0x3UL << FPCR_DYN_SHIFT)static inline unsigned longrdfpcr (void){  unsigned long fpcr;  asm ("excb; mf_fpcr %0" : "=f"(fpcr));  return fpcr;}static inline voidwrfpcr (unsigned long fpcr){  asm volatile ("mt_fpcr %0; excb" : : "f"(fpcr));}void__setfpucw (fpu_control_t fpu_control){  unsigned long fpcr;  if (!fpu_control)    fpu_control = _FPU_DEFAULT;  /* first, set dynamic rounding mode: */  fpcr = rdfpcr();  fpcr &= ~FPCR_DYN_MASK;  switch (fpu_control & 0xc00)    {    case _FPU_RC_NEAREST:	fpcr |= FPCR_DYN_NORMAL; break;    case _FPU_RC_DOWN:		fpcr |= FPCR_DYN_MINUS; break;    case _FPU_RC_UP:		fpcr |= FPCR_DYN_PLUS; break;    case _FPU_RC_ZERO:		fpcr |= FPCR_DYN_CHOPPED; break;    }  wrfpcr(fpcr);  /* XXX trap bits? */  __fpu_control = fpu_control;	/* update global copy */}