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72 lines
1.7 KiB
Plaintext
72 lines
1.7 KiB
Plaintext
;
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; File: XBSUN.a
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;
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; Contains: Routine to handle 'Branch/Set on UNordered exception
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;
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; Originally Written by: Motorola Inc.
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; Adapted to Apple/MPW: Jon Okada
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;
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; Copyright: © 1990, 1991 by Apple Computer, Inc., all rights reserved.
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;
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; This file is used in these builds: Mac32
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;
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; Change History (most recent first):
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;
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; <2> 3/30/91 BG Rolling in Jon Okada's latest changes.
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; <1> 12/14/90 BG First checked into TERROR/BBS.
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; xbsun.a
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; Based upon Motorola file 'x_bsun.sa'
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; CHANGE LOG:
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; 08 Jan 91 JPO Inserted label 'bsun' at top of code. Modified
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; code to branch to user handler.
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;
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*
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* x_bsun.sa 3.1 12/10/90
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*
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* fpsp_bsun --- FPSP handler for branch/set on unordered exception
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*
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* Copy the PC to FPIAR to maintain 881/882 compatability
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*
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* The real_bsun handler will need to perform further corrective
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* measures as outlined in the 040 User's Manual on pages
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* 9-41f, section 9.8.3.
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*
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* Copyright (C) Motorola, Inc. 1990
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* All Rights Reserved
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*
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* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA
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* The copyright notice above does not evidence any
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* actual or intended publication of such source code.
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* X_BSUN IDNT 2,1 Motorola 040 Floating Point Software Package
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bsun: ; <1/8/91, JPO>
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fpsp_bsun:
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*
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link a6,#-LOCAL_SIZE
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fsave -(a7)
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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 fpcr/fpsr/fpiar,USER_FPCR(a6)
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*
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move.l EXC_PC(a6),USER_FPIAR(a6)
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*
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movem.l USER_DA(a6),d0-d1/a0-a1
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fmovem.x USER_FP0(a6),fp0-fp3
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fmovem.l USER_FPCR(a6),fpcr/fpsr/fpiar
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frestore (a7)+
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unlk a6
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; bra.l real_bsun ; deleted <1/8/91, JPO>
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move.l (FPBSUN_VEC040).W,-(sp) ; push vector to user's handler <1/8/91, JPO>
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rts ; execute user's handler <1/8/91, JPO>
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*
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