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 }
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