0001 /*
0002 NetWinder Floating Point Emulator
0003 (c) Rebel.COM, 1998,1999
0004
0005 Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
0006
0007 This program is free software; you can redistribute it and/or modify
0008 it under the terms of the GNU General Public License as published by
0009 the Free Software Foundation; either version 2 of the License, or
0010 (at your option) any later version.
0011
0012 This program is distributed in the hope that it will be useful,
0013 but WITHOUT ANY WARRANTY; without even the implied warranty of
0014 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
0015 GNU General Public License for more details.
0016
0017 You should have received a copy of the GNU General Public License
0018 along with this program; if not, write to the Free Software
0019 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
0020 */
0021
0022 #include "fpa11.h"
0023
0024 /* Read and write floating point status register */
0025 static inline unsigned int readFPSR(void)
0026 {
0027 FPA11 *fpa11 = GET_FPA11();
0028 return (fpa11->fpsr);
0029 }
0030
0031 static inline void writeFPSR(FPSR reg)
0032 {
0033 FPA11 *fpa11 = GET_FPA11();
0034 /* the sysid byte in the status register is readonly */
0035 fpa11->fpsr = (fpa11->fpsr & MASK_SYSID) | (reg & ~MASK_SYSID);
0036 }
0037
0038 /* Read and write floating point control register */
0039 static inline FPCR readFPCR(void)
0040 {
0041 FPA11 *fpa11 = GET_FPA11();
0042 /* clear SB, AB and DA bits before returning FPCR */
0043 return (fpa11->fpcr & ~MASK_RFC);
0044 }
0045
0046 static inline void writeFPCR(FPCR reg)
0047 {
0048 FPA11 *fpa11 = GET_FPA11();
0049 fpa11->fpcr &= ~MASK_WFC; /* clear SB, AB and DA bits */
0050 fpa11->fpcr |= (reg & MASK_WFC); /* write SB, AB and DA bits */
0051 }
