1994-10-26 10:48:18 +03:00
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* $NetBSD: DYADIC.GEN,v 1.2 1994/10/26 07:48:29 cgd Exp $
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1994-07-05 21:50:24 +04:00
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* MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
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* M68000 Hi-Performance Microprocessor Division
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* M68040 Software Package
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*
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* M68040 Software Package Copyright (c) 1993, 1994 Motorola Inc.
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* All rights reserved.
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*
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* THE SOFTWARE is provided on an "AS IS" basis and without warranty.
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* To the maximum extent permitted by applicable law,
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* MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
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* INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
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* PARTICULAR PURPOSE and any warranty against infringement with
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* regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF)
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* and any accompanying written materials.
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*
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* To the maximum extent permitted by applicable law,
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* IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
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* (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS
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* PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR
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* OTHER PECUNIARY LOSS) ARISING OF THE USE OR INABILITY TO USE THE
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* SOFTWARE. Motorola assumes no responsibility for the maintenance
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* and support of the SOFTWARE.
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*
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* You are hereby granted a copyright license to use, modify, and
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* distribute the SOFTWARE so long as this entire notice is retained
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* without alteration in any modified and/or redistributed versions,
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* and that such modified versions are clearly identified as such.
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* No licenses are granted by implication, estoppel or otherwise
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* under any patents or trademarks of Motorola, Inc.
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*
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* DYADIC.GEN 1.2 4/30/91
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*
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* DYADIC.GEN --- generic DYADIC template
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*
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* This version saves all registers that will be used by the emulation
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* routines and restores all but FP0 on exit. The FPSR is
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* updated to reflect the result of the operation. Return value
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* is placed in FP0 for single, double and extended results.
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*
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* The package subroutines expect the incoming FPCR to be zeroed
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* since they need extended precision to work properly. The
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* 'final' FPCR is expected in USER_FPCR(a6) so that the calculated result
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* can be properly sized and rounded. Also, if the incoming FPCR
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* has enabled any exceptions, the exception will be taken on the
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* final fmovem in this template.
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*
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* Customizations:
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* 1. Remove the movem.l at the entry and exit of
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* each routine if your compiler treats those
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* registers as scratch.
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* 2. Likewise, don't save FP0/FP1 if they are scratch
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* registers.
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* 3. Delete updating of the fpsr if you only care about
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* the result.
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* 4. Remove the _OPs_ and _OPx_ entry points if your compiler
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* treats everything as doubles.
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* 5. Move the result to d0/d1 if the compiler is that old.
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*
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xref _OPa_
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xref tag
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xdef _OPs_
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_OPs_:
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link a6,#-LOCAL_SIZE
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movem.l d0-d1/a0-a1,USER_DA(a6)
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fmovem.x fp0-fp3,USER_FP0(a6)
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fmovem.l fpsr/fpcr,USER_FPSR(a6) ; user's rounding mode/precision
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fmove.l #0,fpcr ; force rounding mode/prec to extended,rn
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*
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* copy, convert and tag input arguments
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*
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fmove.s 8(a6),fp0
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fmove.x fp0,FPTEMP(a6)
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lea FPTEMP(a6),a0
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bsr tag
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move.b d0,DTAG(a6)
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fmove.s 12(a6),fp0
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fmove.x fp0,ETEMP(a6)
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lea ETEMP(a6),a0
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bsr tag
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move.b d0,STAG(a6)
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bsr _OPa_
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fmove.l fpsr,d0 ; update status register
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or.b FPSR_AEXCEPT(a6),d0 ;add previously accrued exceptions
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swap.w d0
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or.b FPSR_QBYTE(a6),d0 ; pickup sign of quotient byte
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swap.w d0
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fmove.l d0,fpsr
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*
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* Result is now in FP0
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*
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movem.l USER_DA(a6),d0-d1/a0-a1
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fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored
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unlk a6
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rts
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xdef _OPd_
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_OPd_:
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link a6,#-LOCAL_SIZE
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movem.l d0-d1/a0-a1,USER_DA(a6)
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fmovem.x fp0-fp3,USER_FP0(a6)
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fmovem.l fpsr/fpcr,USER_FPSR(a6) ; user's rounding mode/precision
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fmove.l #0,fpcr ; force rounding mode/prec to extended,rn
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*
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* copy, convert and tag input arguments
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*
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fmove.d 8(a6),fp0
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fmove.x fp0,FPTEMP(a6)
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lea FPTEMP(a6),a0
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bsr tag
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move.b d0,DTAG(a6)
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fmove.d 16(a6),fp0
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fmove.x fp0,ETEMP(a6)
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lea ETEMP(a6),a0
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bsr tag
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move.b d0,STAG(a6)
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bsr _OPa_
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fmove.l fpsr,d0 ; update status register
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or.b FPSR_AEXCEPT(a6),d0 ;add previously accrued exceptions
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swap.w d0
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or.b FPSR_QBYTE(a6),d0 ; pickup sign of quotient byte
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swap.w d0
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fmove.l d0,fpsr
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*
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* Result is now in FP0
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*
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movem.l USER_DA(a6),d0-d1/a0-a1
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fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored
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unlk a6
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rts
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xdef _OPx_
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_OPx_:
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link a6,#-LOCAL_SIZE
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movem.l d0-d1/a0-a1,USER_DA(a6)
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fmovem.x fp0-fp3,USER_FP0(a6)
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fmovem.l fpsr/fpcr,USER_FPSR(a6) ; user's rounding mode/precision
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fmove.l #0,fpcr ; force rounding mode/prec to extended,rn
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*
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* copy, convert and tag input arguments
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*
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fmove.x 8(a6),fp0
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fmove.x fp0,FPTEMP(a6)
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lea FPTEMP(a6),a0
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bsr tag
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move.b d0,DTAG(a6)
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fmove.x 20(a6),fp0
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fmove.x fp0,ETEMP(a6)
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lea ETEMP(a6),a0
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bsr tag
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move.b d0,STAG(a6)
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bsr _OPa_
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fmove.l fpsr,d0 ; update status register
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or.b FPSR_AEXCEPT(a6),d0 ;add previously accrued exceptions
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swap.w d0
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or.b FPSR_QBYTE(a6),d0 ; pickup sign of quotient byte
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swap.w d0
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fmove.l d0,fpsr
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*
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* Result is now in FP0
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*
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movem.l USER_DA(a6),d0-d1/a0-a1
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fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored
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unlk a6
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rts
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