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 */ 25static inline unsigned int readFPSR(void) 26{ 27 FPA11 *fpa11 = GET_FPA11(); 28 return (fpa11->fpsr); 29} 30 31static 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 */ 39static 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 46static 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