LXR linux/arch/arm/nwfpe/fpa11.inl

   1/*
   2    NetWinder Floating Point Emulator
   3    (c) Rebel.COM, 1998,1999
   4
   5    Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20*/
  21
  22#include "fpa11.h"
  23
  24/* Read and write floating point status register */
  25static inline unsigned int readFPSR(void)
  26{
  27        FPA11 *fpa11 = GET_FPA11();
  28        return (fpa11->fpsr);
  29}
  30
  31static inline void writeFPSR(FPSR reg)
  32{
  33        FPA11 *fpa11 = GET_FPA11();
  34        /* the sysid byte in the status register is readonly */
  35        fpa11->fpsr = (fpa11->fpsr & MASK_SYSID) | (reg & ~MASK_SYSID);
  36}
  37
  38/* Read and write floating point control register */
  39static inline FPCR readFPCR(void)
  40{
  41        FPA11 *fpa11 = GET_FPA11();
  42        /* clear SB, AB and DA bits before returning FPCR */
  43        return (fpa11->fpcr & ~MASK_RFC);
  44}
  45
  46static inline void writeFPCR(FPCR reg)
  47{
  48        FPA11 *fpa11 = GET_FPA11();
  49        fpa11->fpcr &= ~MASK_WFC;               /* clear SB, AB and DA bits */
  50        fpa11->fpcr |= (reg & MASK_WFC);        /* write SB, AB and DA bits */
  51}
  52