86 lines
1.3 KiB
C
86 lines
1.3 KiB
C
#define RCSID4 "$Id$"
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*
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*/
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/*
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* Intel 8080 parsing rules
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*/
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operation
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: NOOPOP
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{ emit1($1);}
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D8OP expr
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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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D16OP expr
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{ emit1($1);
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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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R16OP r16
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{ emit1($1 | ($2 << 3));}
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MOV r8 ',' r8
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{ if ($2 == M && $4 == M)
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serror("register error");
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emit1($1 | ($2 << 3) | $4);
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}
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MVI r8 ',' expr
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{ emit1($1 | ($2 << 3));
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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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LXI r16 ',' expr
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{ emit1($1 | ($2 << 3));
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#ifdef RELOCATION
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newrelo($4.typ, RELO2);
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#endif
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emit2($4.val);
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}
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SRCOP r8
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{ emit1($1 | $2);}
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DSTOP r8
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{ emit1($1 | ($2 << 3));}
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RST absexp
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{ fit(fit3($2));
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emit1($1 | (low3($2) << 3));
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}
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STLDAX r16
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{
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if ($2 != B && $2 != D)
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serror("register error");
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emit1($1 | (($2 & 02) << 3));
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}
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;
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r16 : REG
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{ if ($1 & ~06)
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serror("register error");
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$$ = $1 & 06;
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}
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;
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r8 : REG
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{ if (($1 & ~07) != 0)
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serror("register error");
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$$ = $1 & 07;
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}
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;
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