MONADIC.R3V6 revision 1.2
1 1.2 cgd * $NetBSD: MONADIC.R3V6,v 1.2 1994/10/26 07:48:44 cgd Exp $ 2 1.2 cgd 3 1.1 mycroft * MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP 4 1.1 mycroft * M68000 Hi-Performance Microprocessor Division 5 1.1 mycroft * M68040 Software Package 6 1.1 mycroft * 7 1.1 mycroft * M68040 Software Package Copyright (c) 1993, 1994 Motorola Inc. 8 1.1 mycroft * All rights reserved. 9 1.1 mycroft * 10 1.1 mycroft * THE SOFTWARE is provided on an "AS IS" basis and without warranty. 11 1.1 mycroft * To the maximum extent permitted by applicable law, 12 1.1 mycroft * MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED, 13 1.1 mycroft * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A 14 1.1 mycroft * PARTICULAR PURPOSE and any warranty against infringement with 15 1.1 mycroft * regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF) 16 1.1 mycroft * and any accompanying written materials. 17 1.1 mycroft * 18 1.1 mycroft * To the maximum extent permitted by applicable law, 19 1.1 mycroft * IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER 20 1.1 mycroft * (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS 21 1.1 mycroft * PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR 22 1.1 mycroft * OTHER PECUNIARY LOSS) ARISING OF THE USE OR INABILITY TO USE THE 23 1.1 mycroft * SOFTWARE. Motorola assumes no responsibility for the maintenance 24 1.1 mycroft * and support of the SOFTWARE. 25 1.1 mycroft * 26 1.1 mycroft * You are hereby granted a copyright license to use, modify, and 27 1.1 mycroft * distribute the SOFTWARE so long as this entire notice is retained 28 1.1 mycroft * without alteration in any modified and/or redistributed versions, 29 1.1 mycroft * and that such modified versions are clearly identified as such. 30 1.1 mycroft * No licenses are granted by implication, estoppel or otherwise 31 1.1 mycroft * under any patents or trademarks of Motorola, Inc. 32 1.1 mycroft 33 1.1 mycroft * 34 1.1 mycroft * MONADIC.R3V6 1.3 4/30/91 35 1.1 mycroft * 36 1.1 mycroft * MONADIC.R3V6 --- MONADIC template for MCD R3V6 native C compiler 37 1.1 mycroft * 38 1.1 mycroft * The MCD compiler is old. It returns float and double values 39 1.1 mycroft * as a double stored in d0/d1. There is no support for single or extended 40 1.1 mycroft * precision operations. It's not clear whether the float registers 41 1.1 mycroft * should be preserved, so for speed, they're not. 42 1.1 mycroft * 43 1.1 mycroft 44 1.1 mycroft xref tag 45 1.1 mycroft xref _OPr_ 46 1.1 mycroft xref _OPz_ 47 1.1 mycroft xref _OPi_ 48 1.1 mycroft xref _OPn_ 49 1.1 mycroft xref _OPm_ 50 1.1 mycroft 51 1.1 mycroft xdef _OPd_ 52 1.1 mycroft _OPd_: 53 1.1 mycroft link a6,#-LOCAL_SIZE 54 1.1 mycroft fmove.l fpcr,d1 ; user's rounding mode/precision 55 1.1 mycroft fmove.l #0,fpcr ; force rounding mode/prec to extended,rn 56 1.1 mycroft * 57 1.1 mycroft * copy, convert and tag input argument 58 1.1 mycroft * 59 1.1 mycroft fmove.d 8(a6),fp0 60 1.1 mycroft fmove.x fp0,ETEMP(a6) 61 1.1 mycroft lea ETEMP(a6),a0 62 1.1 mycroft bsr tag 63 1.1 mycroft move.b d0,STAG(a6) 64 1.1 mycroft tst.b d0 65 1.1 mycroft bne.b _TMP_2 66 1.1 mycroft bsr _OPr_ ; normalized (regular) number 67 1.1 mycroft bra.b _TMP_6 68 1.1 mycroft _TMP_2: 69 1.1 mycroft cmp.b #$20,d0 ; zero? 70 1.1 mycroft bne.b _TMP_3 71 1.1 mycroft bsr _OPz_ 72 1.1 mycroft bra.b _TMP_6 73 1.1 mycroft _TMP_3: 74 1.1 mycroft cmp.b #$40,d0 ; infinity? 75 1.1 mycroft bne.b _TMP_4 76 1.1 mycroft bsr _OPi_ 77 1.1 mycroft bra.b _TMP_6 78 1.1 mycroft _TMP_4: 79 1.1 mycroft cmp.b #$60,d0 ; NaN? 80 1.1 mycroft bne.b _TMP_5 81 1.1 mycroft bsr _OPn_ 82 1.1 mycroft bra.b _TMP_6 83 1.1 mycroft _TMP_5: 84 1.1 mycroft bsr _OPm_ ; assuming a denorm... 85 1.1 mycroft 86 1.1 mycroft _TMP_6: 87 1.1 mycroft fmove.d fp0,USER_D0(a6) ; result goes into d0/d1 pair 88 1.1 mycroft movem.l USER_D0(a6),d0-d1 89 1.1 mycroft unlk a6 90 1.1 mycroft rts 91 1.1 mycroft 92
Indexes created Sun Nov 02 07:10:05 GMT 2025