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1da177e4 LT |
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 | } |