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Annotation of sys/arch/m68k/fpsp/DYADIC.CI5, Revision 1.1

1.1     ! nbrk        1: *      $OpenBSD: DYADIC.CI5,v 1.2 1996/05/29 21:05:18 niklas Exp $
        !             2: *      $NetBSD: DYADIC.CI5,v 1.2 1994/10/26 07:48:26 cgd Exp $
        !             3:
        !             4: *      MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
        !             5: *      M68000 Hi-Performance Microprocessor Division
        !             6: *      M68040 Software Package
        !             7: *
        !             8: *      M68040 Software Package Copyright (c) 1993, 1994 Motorola Inc.
        !             9: *      All rights reserved.
        !            10: *
        !            11: *      THE SOFTWARE is provided on an "AS IS" basis and without warranty.
        !            12: *      To the maximum extent permitted by applicable law,
        !            13: *      MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
        !            14: *      INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
        !            15: *      PARTICULAR PURPOSE and any warranty against infringement with
        !            16: *      regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF)
        !            17: *      and any accompanying written materials.
        !            18: *
        !            19: *      To the maximum extent permitted by applicable law,
        !            20: *      IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
        !            21: *      (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS
        !            22: *      PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR
        !            23: *      OTHER PECUNIARY LOSS) ARISING OF THE USE OR INABILITY TO USE THE
        !            24: *      SOFTWARE.  Motorola assumes no responsibility for the maintenance
        !            25: *      and support of the SOFTWARE.
        !            26: *
        !            27: *      You are hereby granted a copyright license to use, modify, and
        !            28: *      distribute the SOFTWARE so long as this entire notice is retained
        !            29: *      without alteration in any modified and/or redistributed versions,
        !            30: *      and that such modified versions are clearly identified as such.
        !            31: *      No licenses are granted by implication, estoppel or otherwise
        !            32: *      under any patents or trademarks of Motorola, Inc.
        !            33:
        !            34: *
        !            35: *      DYADIC.CI5 1.2 4/30/91
        !            36: *
        !            37: *      DYADIC.CI5 --- DYADIC template for CI5 compiler
        !            38: *
        !            39:
        !            40:        xref    _OPa_
        !            41:        xref    tag
        !            42:
        !            43:        xdef    _OPd_
        !            44: _OPd_:
        !            45:        link    a6,#-LOCAL_SIZE
        !            46:        fmovem.x fp2-fp3,USER_FP2(a6)
        !            47:        fmovem.l fpsr/fpcr,USER_FPSR(a6) ; user's rounding mode/precision
        !            48:        fmove.l #0,fpcr         ; force rounding mode/prec to extended,rn
        !            49: *
        !            50: *      copy, convert and tag input arguments
        !            51: *
        !            52:        fmove.d 8(a6),fp0
        !            53:        fmove.x fp0,FPTEMP(a6)
        !            54:        lea     FPTEMP(a6),a0
        !            55:        bsr     tag
        !            56:        move.b  d0,DTAG(a6)
        !            57:
        !            58:        fmove.d 16(a6),fp0
        !            59:        fmove.x fp0,ETEMP(a6)
        !            60:        lea     ETEMP(a6),a0
        !            61:        bsr     tag
        !            62:        move.b  d0,STAG(a6)
        !            63:
        !            64:        bsr     _OPa_
        !            65:
        !            66:        fmove.l fpsr,d0         ; update status register
        !            67:        or.b    FPSR_AEXCEPT(a6),d0     ;add previously accrued exceptions
        !            68:        swap.w  d0
        !            69:        or.b    FPSR_QBYTE(a6),d0       ; pickup sign of quotient byte
        !            70:        swap.w  d0
        !            71:        fmove.l d0,fpsr
        !            72: *
        !            73: *      Result is now in FP0
        !            74: *
        !            75:        fmovem.x USER_FP2(a6),fp2-fp3   ; note: FP0/FP1 not restored
        !            76:        unlk    a6
        !            77:        rts
        !            78: