fpa11.inl
上传用户:lgb322
上传日期:2013-02-24
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文件大小:2k
- /*
- NetWinder Floating Point Emulator
- (c) Rebel.COM, 1998,1999
- Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include "fpa11.h"
- /* Read and write floating point status register */
- extern __inline__ unsigned int readFPSR(void)
- {
- FPA11 *fpa11 = GET_FPA11();
- return(fpa11->fpsr);
- }
- extern __inline__ void writeFPSR(FPSR reg)
- {
- FPA11 *fpa11 = GET_FPA11();
- /* the sysid byte in the status register is readonly */
- fpa11->fpsr = (fpa11->fpsr & MASK_SYSID) | (reg & ~MASK_SYSID);
- }
- /* Read and write floating point control register */
- extern __inline__ FPCR readFPCR(void)
- {
- FPA11 *fpa11 = GET_FPA11();
- /* clear SB, AB and DA bits before returning FPCR */
- return(fpa11->fpcr & ~MASK_RFC);
- }
- extern __inline__ void writeFPCR(FPCR reg)
- {
- FPA11 *fpa11 = GET_FPA11();
- fpa11->fpcr &= ~MASK_WFC; /* clear SB, AB and DA bits */
- fpa11->fpcr |= (reg & MASK_WFC); /* write SB, AB and DA bits */
- }