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 static inline unsigned int readFPSR(void)

    26 {

    27   FPA11 *fpa11 = GET_FPA11();

    28   return(fpa11->fpsr);

    29 }

    30 

    31 static 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 static 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 static 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 }