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 | } |
52 | |