79 lines
1.3 KiB
C
79 lines
1.3 KiB
C
#define RCSID4 "$Header$"
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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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/*
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* Motorola 6800 parsing rules
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*/
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operation
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:
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NOARG
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{ emit1($1);}
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BRANCH expr
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{ branch($1,$2);}
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XOP '#' expr
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{ emit1($1 - 0x20);
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switch ($1 & 0x0F) {
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case 0x03:
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case 0x0C:
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case 0x0E:
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#ifdef RELOCATION
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newrelo($3.typ, RELBR | RELO2);
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#endif
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emit2($3.val);
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break;
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default:
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#ifdef RELOCATION
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newrelo($3.typ, RELO1);
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#endif
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emit1($3.val);
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}
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}
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XOP '<' expr
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{ emit1($1 - 0x10);
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#ifdef RELOCATION
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newrelo($3.typ, RELO1);
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#endif
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emit1($3.val);
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}
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memref expr
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{ emit1($1 + 0x10);
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#ifdef RELOCATION
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newrelo($2.typ, RELO2);
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#endif
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emit2($2.val);
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}
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memref expr ',' X
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{ emit1($1);
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#ifdef RELOCATION
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newrelo($2.typ, RELO1);
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#endif
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emit1($2.val);
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}
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;
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memref :
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AOP
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XOP
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;
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