fpa11.inl
1.59 KB
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/*
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 */
static inline unsigned int readFPSR(void)
{
FPA11 *fpa11 = GET_FPA11();
return (fpa11->fpsr);
}
static 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 */
static inline FPCR readFPCR(void)
{
FPA11 *fpa11 = GET_FPA11();
/* clear SB, AB and DA bits before returning FPCR */
return (fpa11->fpcr & ~MASK_RFC);
}
static 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 */
}