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111 lines
3.8 KiB
Plaintext
111 lines
3.8 KiB
Plaintext
;
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; File: FPHW.a
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;
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; Contains: HW Floating Point FP68K ("PACK 4") that calls MC68881/882 or uses MC68040 FPU
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;
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; Written by: Apple Numerics Group, DSG
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;
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; Copyright: © 1985-1992 by Apple Computer, Inc. All rights reserved.
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;
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; Change History (most recent first):
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;
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; <SM2> 10/29/92 SWC Changed ToolEqu.a->ToolUtils.a.
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; <2> 10/28/91 SAM/KSM Added a default definition for BACKPATCH of true.
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; <1> 10/24/91 SAM/KSM Rolled in Regatta file.
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;
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; Terror Change History:
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;
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; <2> 1/9/91 BG Removed the PROC040 -IF- directive. FPHW.a will now build with
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; MACHINE MC68040 set so that all the FPU instructions will be
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; assembled the same as if there was an MC68881 directive, but
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; this will also allow the use of 040 cache manipulation
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; instructions (CPUSH).
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; <1> 01/06/90 BG Added to TERROR/BBS for the time.
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; ———————————————————————————————————————————————————————————————————————————————————————
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; Pre-TERROR ROM comments begin here.
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; ———————————————————————————————————————————————————————————————————————————————————————
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; 12/17/90 JPO Added conditional equate for PROC040.
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; 12/6/90 JPO Modified for MC68040 platform.
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; 9/30/90 SM Goes final for Terror alpha.
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; 9/7/90 SM Goes beta for Tim. Updated version number.
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; 5/22/90 SM Goes alpha for waimea. Copyright updated.
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; 12/18/89 SM Complete rewrite begins.
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; 1/23/87 SM MC68881 directive moved here from file fp881arith.a.
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; 1/16/87 SM Added INCLUDE TRAPS.A for _SysError call in fp881ctrl.a.
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; 1/15/87 SM Changed copyright notice.
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; 1/15/87 SM Deleted INCLUDE SYSEQU.A.
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; Rev28 1/16/85 moved to MPW.
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; Rev27 12/19/85 CVT routines fixed and shortened.
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; Rev26 12/5/85 NextAfter OK.
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; Rev14 8/28/85 (Debugging Coonen Bin-Dec routines).
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; Rev9 6/17/85
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;
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MAIN
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BLANKS ON
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STRING ASIS
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DATA MAIN
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ORG -$100
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CODE
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PRINT ON
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FPASSEMBLER EQU 1
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;------------------------------------------------------------------------------- <T2> thru next <T2>
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;
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; NOTE - The MACHINE MC68040 directive "should" create the same instructions as
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;
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; MACHINE MC68020
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; MC68881
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;
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; ... but allows you to also use the 040 special cache-flushing instructions
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; as well. As far as I know, there's only one place where this could be an
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; issue (FLUSHCACHE), which uses a CPUSHL bc,(Ax) to push the appropriate
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; cache line in the backpatching install code on an 040, whereas it does a
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; MOVEC D0,CACR to set the "flush I-Cache" bit on 020/030s. This should
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; still work, since the MOVEC Dx,CACR instruction creates the same instruction
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; in both the 020/030 and 040.
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;-------------------------------------------------------------------------------
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MACHINE MC68040
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; MACHINE MC68020
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; MC68881 ; <T2>
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INCLUDE 'FPHWEqus.a'
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INCLUDE 'ToolUtils.a'
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INCLUDE 'Traps.a'
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; This is not a standard definition in the System Equates, so it is included here <T2>
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IF &TYPE('BACKPATCH') = 'UNDEFINED' THEN ; <2>
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BACKPATCH: EQU 1
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ENDIF
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If &TYPE('_SysBreak') = 'UNDEFINED' Then ; Arg!! <T3>
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MACRO ; <T2>
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_SysBreak ; <T2>
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MOVE.W #-490, D0 ; <T2>
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_SysError ; <T2>
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ENDM ; <T2>
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ENDIF ; <T3>
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INCLUDE 'SANEMacs.a'
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CPUFlag EQU $12F ; So this builds! <T3>
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cpu68040 EQU 4
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;INCLUDE 'SysEqu.a' ; for CPUFlag definition <T2>
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EXPORT FP68K
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FP68K
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INCLUDE 'FPHWCtrl.a'
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INCLUDE 'FPHWArith.a'
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INCLUDE 'FPHWNonArith.a'
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INCLUDE 'FPHWB2DC.a'
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OMEGA881END:
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END
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