202 lines
4.8 KiB
Plaintext
202 lines
4.8 KiB
Plaintext
* 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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* MONADIC.GCC --- MONADIC template for GCC compiler
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*
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* This is based on the generic template. The only difference is that
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* GCC does not need the d0-d1/a0-a1 registers saved.
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*
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* Customizations:
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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 handling of the fpsr if you only care about
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* the result.
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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 tag
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xref _OPr_
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xref _OPz_
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xref _OPi_
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xref _OPn_
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xref _OPm_
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xdef _OPs_
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_OPs_:
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link a6,#-LOCAL_SIZE
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fmovem.x fp0-fp3,USER_FP0(a6)
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fmove.l fpsr,USER_FPSR(a6)
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fmove.l fpcr,USER_FPCR(a6)
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fmove.l fpcr,d1 ; 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 argument
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*
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fmove.s 8(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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tst.b d0
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bne.b _TMP_2
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bsr _OPr_ ; normalized (regular) number
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bra.b _TMP_6
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_TMP_2:
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cmp.b #$20,d0 ; zero?
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bne.b _TMP_3
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bsr _OPz_
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bra.b _TMP_6
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_TMP_3:
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cmp.b #$40,d0 ; infinity?
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bne.b _TMP_4
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bsr _OPi_
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bra.b _TMP_6
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_TMP_4:
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cmp.b #$60,d0 ; NaN?
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bne.b _TMP_5
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bsr _OPn_
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bra.b _TMP_6
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_TMP_5:
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bsr _OPm_ ; assuming a denorm...
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_TMP_6:
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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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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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fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored
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fmove.l USER_FPCR(a6),fpcr ; fpcr 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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fmovem.x fp0-fp3,USER_FP0(a6)
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fmove.l fpsr,USER_FPSR(a6)
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fmove.l fpcr,USER_FPCR(a6)
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fmove.l fpcr,d1 ; 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 argument
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*
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fmove.d 8(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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tst.b d0
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bne.b _TMP_7
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bsr _OPr_ ; normalized (regular) number
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bra.b _TMP_B
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_TMP_7:
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cmp.b #$20,d0 ; zero?
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bne.b _TMP_8
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bsr _OPz_
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bra.b _TMP_B
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_TMP_8:
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cmp.b #$40,d0 ; infinity?
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bne.b _TMP_9
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bsr _OPi_
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bra.b _TMP_B
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_TMP_9:
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cmp.b #$60,d0 ; NaN?
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bne.b _TMP_A
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bsr _OPn_
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bra.b _TMP_B
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_TMP_A:
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bsr _OPm_ ; assuming a denorm...
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_TMP_B:
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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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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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fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored
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fmove.l USER_FPCR(a6),fpcr ; fpcr 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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fmovem.x fp0-fp3,USER_FP0(a6)
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fmove.l fpsr,USER_FPSR(a6)
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fmove.l fpcr,USER_FPCR(a6)
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fmove.l fpcr,d1 ; 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 argument
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*
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fmove.x 8(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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tst.b d0
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bne.b _TMP_C
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bsr _OPr_ ; normalized (regular) number
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bra.b _TMP_G
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_TMP_C:
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cmp.b #$20,d0 ; zero?
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bne.b _TMP_D
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bsr _OPz_
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bra.b _TMP_G
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_TMP_D:
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cmp.b #$40,d0 ; infinity?
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bne.b _TMP_E
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bsr _OPi_
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bra.b _TMP_G
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_TMP_E:
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cmp.b #$60,d0 ; NaN?
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bne.b _TMP_F
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bsr _OPn_
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bra.b _TMP_G
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_TMP_F:
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bsr _OPm_ ; assuming a denorm...
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_TMP_G:
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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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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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fmovem.x USER_FP1(a6),fp1-fp3 ; note: FP0 not restored
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fmove.l USER_FPCR(a6),fpcr ; fpcr restored
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unlk a6
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rts
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