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Annotation of sys/arch/m68k/fpsp/DYADIC.R3V6, Revision 1.1.1.1

1.1       nbrk        1: *      $OpenBSD: DYADIC.R3V6,v 1.2 1996/05/29 21:05:20 niklas Exp $
                      2: *      $NetBSD: DYADIC.R3V6,v 1.2 1994/10/26 07:48:31 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.R3V6 1.2 4/30/91
                     36: *
                     37: *      DYADIC.R3V6 --- DYADIC template for MCD R3V6 native C compiler
                     38: *
                     39: *      The MCD compiler is old.  It returns float and double values
                     40: *      as a double stored in d0/d1.  There is no support for single or extended
                     41: *      precision operations.  It's not clear whether the float registers
                     42: *      should be preserved, so for speed they're not.
                     43: *
                     44:
                     45:        xref    _OPa_
                     46:        xref    tag
                     47:
                     48:        xdef    _OPd_
                     49: _OPd_:
                     50:        link    a6,#-LOCAL_SIZE
                     51:        fmovem.l fpsr/fpcr,USER_FPSR(a6) ; user's rounding mode/precision
                     52:        fmove.l #0,fpcr         ; force rounding mode/prec to extended,rn
                     53: *
                     54: *      copy and convert arguments to ETEMP, FPTEMP.
                     55: *
                     56:        fmove.d 8(a6),fp0
                     57:        fmove.x fp0,FPTEMP(a6)
                     58:        lea     FPTEMP(a6),a0
                     59:        bsr     tag
                     60:        move.b  d0,DTAG(a6)
                     61:
                     62:        fmove.d 16(a6),fp0
                     63:        fmove.x fp0,ETEMP(a6)
                     64:        lea     ETEMP(a6),a0
                     65:        bsr     tag
                     66:        move.b  d0,STAG(a6)
                     67:
                     68:        bsr     _OPa_
                     69:
                     70:        fmove.d fp0,USER_D0(a6) ; result goes into d0/d1 pair
                     71:        movem.l USER_D0(a6),d0-d1
                     72:        unlk    a6
                     73:        rts