140 lines
2.5 KiB
C
140 lines
2.5 KiB
C
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#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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/* Author: Leo van Moergestel */
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/*
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* Signetics 2650 parsing rules
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*/
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operation:
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NOOP
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{ emit1($1);}
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ZERO ',' REG
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{ emit1($1 | $3); }
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IMMED ',' REG expr
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{ emit1($1 | $3); page();
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#ifdef RELOCATION
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newrelo($4.typ, RELO1);
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#endif
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emit1($4.val);
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}
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REL ',' REG expr
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{ emit1($1 | $3); rela($4, 0);}
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REL ',' REG '*' expr
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{ emit1($1 | $3); rela($5, 0x80);}
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ZEROX ',' REG
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{ if ($3 == R0)
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serror("register error");
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emit1($1 | $3);
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}
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ABSO ',' REG param
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{ emit1($1 | $3);
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absoa(par_exp, p_indexed, p_indirect);
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}
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PSWM expr
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{ emit1($1); page();
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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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RET ',' CC
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{ emit1($1 | $3);}
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BRANCR ',' CC expr
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{ emit1($1 | $3); rela($4, 0);}
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BRANCR ',' CC '*' expr
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{ emit1($1 | $3); rela($5, 0x80);}
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BRANCRX ',' CC expr
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{ if($3 == 3)
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serror("wrong condition");
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emit1($1 | $3); rela($4, 0);}
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BRANCRX ',' CC '*' expr
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{ if($3 == 3)
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serror("wrong condition");
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emit1($1 | $3); rela($5, 0x80);}
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BRANCA ',' CC expr
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{ emit1($1 | $3); absob($4, 0);}
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BRANCA ',' CC '*' expr
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{ emit1($1 | $3); absob($5, 0x8000);}
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BRANCAX ',' CC expr
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{ if($3 == 3)
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serror("wrong condition");
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emit1($1 | $3); absob($4, 0);}
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BRANCAX ',' CC '*' expr
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{ if($3 == 3)
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serror("wrong condition");
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emit1($1 | $3); absob($5, 0x8000);}
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BRANRA ',' REG expr
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{ emit1($1 | $3); absob($4, 0);}
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BRANRA ',' REG '*' expr
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{ emit1($1 | $3); absob($5, 0x8000);}
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ZBRR expr
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{ emit1($1); rela($2, 0);}
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ZBRR '*' expr
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{ emit1($1); rela($3, 0x80);}
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BXSA expr
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{ emit1($1); absob($2, 0);}
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BXSA '*' expr
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{ emit1($1); absob($3, 0x8000);}
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;
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param:
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indir_opt
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{ p_indexed = 0;}
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indir_opt ',' INDE
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{ p_indexed = 0x6000;}
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indir_opt ',' '+'
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{ p_indexed = 0x2000;}
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indir_opt ',' '-'
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{ p_indexed = 0x4000;}
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;
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indir_opt:
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expr
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{ par_exp = $1; p_indirect = 0;}
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'*' expr
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{ par_exp = $2; p_indirect = 0x8000;}
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;
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