56 lines
1.1 KiB
Text
56 lines
1.1 KiB
Text
#
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; $Header$
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;
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; (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
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;
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; This product is part of the Amsterdam Compiler Kit.
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;
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; Permission to use, sell, duplicate or disclose this software must be
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; obtained in writing. Requests for such permissions may be sent to
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;
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; Dr. Andrew S. Tanenbaum
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; Wiskundig Seminarium
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; Vrije Universiteit
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; Postbox 7161
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; 1007 MC Amsterdam
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; The Netherlands
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;
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;
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; Author: J.W. Stevenson */
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mes 2,EM_WSIZE,EM_PSIZE
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#define SIZE 0
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#define HIGH EM_WSIZE
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#define LOWB 2*EM_WSIZE
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#define BASE 3*EM_WSIZE
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; _bts is called with four parameters:
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; - the initial set (BASE)
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; - low bound of range of bits (LOWB)
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; - high bound of range of bits (HIGH)
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; - set size in bytes (SIZE)
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exp $_bts
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pro $_bts,0
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lal BASE ; address of initial set
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lol SIZE
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los EM_WSIZE ; load initial set
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1
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lol LOWB ; low bound
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lol HIGH ; high bound
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bgt *2 ; while low <= high
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lol LOWB
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lol SIZE
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set ? ; create [low]
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lol SIZE
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ior ? ; merge with initial set
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inl LOWB ; increment low bound
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bra *1 ; loop back
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2
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lal BASE
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lol SIZE
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sts EM_WSIZE ; store result over initial set
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ret 0
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end ?
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