| 1 | #
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| 2 | ;
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| 3 | ; (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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| 4 | ; See the copyright notice in the ACK home directory, in the file "Copyright".
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| 5 | ;
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| 6 | ;
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| 7 | ; Module: Compute non-constant set displays
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| 8 | ; Author: Ceriel J.H. Jacobs
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| 9 | ; Version: $Header: /cvsup/minix/src/lib/ack/libm2/LtoUset.e,v 1.1 2005/10/10 15:27:46 beng Exp $
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| 10 | ;
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| 11 | mes 2,_EM_WSIZE,_EM_PSIZE
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| 12 |
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| 13 | ; LtoUset is called for set displays containing { expr1 .. expr2 }.
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| 14 | ; It has six parameters, of which the caller must pop five:
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| 15 | ; - The set in which bits must be set.
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| 16 | ; - the lower bound of the set type.
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| 17 | ; - The set size in bytes.
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| 18 | ; - The upper bound of set elements, specified by the set-type.
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| 19 | ; - "expr2", the upper bound
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| 20 | ; - "expr1", the lower bound
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| 21 |
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| 22 | #define SETBASE 5*_EM_WSIZE
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| 23 | #define SETLOW 4*_EM_WSIZE
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| 24 | #define SETSIZE 3*_EM_WSIZE
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| 25 | #define USETSIZ 2*_EM_WSIZE
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| 26 | #define LWB _EM_WSIZE
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| 27 | #define UPB 0
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| 28 | exp $LtoUset
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| 29 | pro $LtoUset,0
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| 30 | lal SETBASE ; address of initial set
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| 31 | lol SETSIZE
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| 32 | los _EM_WSIZE ; load initial set
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| 33 | lol LWB ; low bound
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| 34 | lol SETLOW
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| 35 | sbu _EM_WSIZE
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| 36 | stl LWB
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| 37 | lol UPB ; high bound
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| 38 | lol SETLOW
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| 39 | sbu _EM_WSIZE
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| 40 | stl UPB
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| 41 | 1
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| 42 | lol LWB
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| 43 | lol UPB
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| 44 | cmu _EM_WSIZE
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| 45 | zgt *2 ; while low <= high
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| 46 | lol LWB
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| 47 | lol SETSIZE
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| 48 | set ? ; create [low]
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| 49 | lol SETSIZE
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| 50 | ior ? ; merge with initial set
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| 51 | lol LWB
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| 52 | loc 1
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| 53 | adu _EM_WSIZE
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| 54 | stl LWB
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| 55 | bra *1 ; loop back
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| 56 | 2
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| 57 | lal SETBASE
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| 58 | lol SETSIZE
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| 59 | sts _EM_WSIZE ; store result over initial set
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| 60 | ret 0
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| 61 | end 0
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