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