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 */
  25 extern __inline__ unsigned int readFPSR(void)
  26 {
  27         FPA11 *fpa11 = GET_FPA11();
  28         return (fpa11->fpsr);
  29 }
  30
  31 extern __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 */
  39 extern __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
  46 extern __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 }