154 lines
2.9 KiB
C
154 lines
2.9 KiB
C
#define RCSID4 "$Header$"
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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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* PDP 11 dependent yacc table
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*/
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operation
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: OP_SO opr1
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{ emit2( $1 | $2 ); op1($2); }
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| OP_DO opr1 ',' opr2
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{ emit2( $1 | ($2 << 6) | $4); op1($2); op2($4);}
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| OP_R_SO REG ',' opr1
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{ emit2( $1 | ($2 << 6) | $4); op1($4); }
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| BR expr
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{ branch( $1, $2); }
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| EJMP expr
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{ ejump( $1, $2); }
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| JMP opr1
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{ jump( $1, $2); }
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| JSR REG ',' opr1
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{ emit2( $1 | ($2 << 6) | $4); op1($4); }
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| RTS REG
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{ emit2($1 | $2); }
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| MARK absexp
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{ fit(fit6($2)); emit2($1 | $2); }
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| SOB REG ',' expr
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{ sob($2, $4); }
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| SPL absexp
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{ fit(fit3($2)); emit2( $1 | $2 ); }
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| TRAP absexp
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{ fit(fit8($2)); emit2( $1 | $2 ); }
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| OP_NO
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{emit2($1); }
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| clcc
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{ emit2($1); }
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| secc
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{ emit2($1); }
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| OP_SO_R opr1 ',' REG
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{ emit2( $1 | ($4 << 6) | $2); op1($2); }
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| MFP opr1
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{ emit2( $1 | $2); op1($2); }
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| FOP_FSO_FR fopr1 ',' fregister
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{emit2($1 | ($4 << 6) | $2); op1($2); }
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| FOP_FSO fopr1
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{ emit2( $1 | $2); op1($2); }
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| FOP_SO opr1
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{ emit2( $1 | $2); op1($2); }
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| MOVF fop2 ',' fregister
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{ emit2(OPLDF | ($4 << 6) | $2); op2($2);}
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| MOVF fregister ',' fopr1
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{ emit2(OPSTF | ($2 << 6) | $4); op1($4); }
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| FOP_SO_FR opr1 ',' fregister
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{ emit2($1 | ($4 << 6) | $2); op1($2); }
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| FOP_FR_SO fregister ',' opr1
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{ emit2($1 | ($2 << 6) | $4); op1($4); }
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| FOP_FR_FSO fregister ',' fopr1
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{ emit2($1 | ($2 << 6) | $4); op1($4); }
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;
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clcc
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: CLEARCC
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| clcc '|' CLEARCC
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{ $$ = ( $1 | $3 ); }
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;
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secc
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: SETCC
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| secc '|' SETCC
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{ $$ = ( $1 | $3 ); }
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;
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opr1
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: opr2
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{ $$ = $1;
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exp_1 = exp_2;
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RELOMOVE(rel_1, rel_2);
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im1flag = im2flag;
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im2flag=0;
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}
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;
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opr2
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: REG
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| op2
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;
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op2
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: ari
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{ $$ = ( RDEFMODE | $1); }
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| '*' REG
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{ $$ = ( RDEFMODE | $2); }
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| ainc
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{ $$ = ( AIMODE | $1 ); }
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| adec
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{ $$ = ( ADMODE | $1 ); }
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| expr ari
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{ exp_2 = $1; $$ = ( INDMODE | $2); im2flag = 1;
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RELOMOVE(rel_2, relonami);
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}
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| '*' expr ari
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{ exp_2 = $2; $$ = ( INDDEFMODE | $3); im2flag = 1;
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RELOMOVE(rel_2, relonami);
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}
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| '*' ainc
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{ $$ = ( AIDEFMODE | $2 ); }
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| '*' adec
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{ $$ = ( ADDEFMODE | $2 ); }
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| expr
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{ exp_2 = $1; $$ = (INDMODE | 07); im2flag = 1;
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RELOMOVE(rel_2, relonami);
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}
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| '$' expr
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{ exp_2 =$2; $$ = ( AIMODE | 07); im2flag = 1;
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RELOMOVE(rel_2, relonami);
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}
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| '*' '$' expr
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{ exp_2 = $3; $$ = ( AIDEFMODE | 07 ); im2flag = 1;
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RELOMOVE(rel_2, relonami);
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}
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| '*' expr
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{ exp_2 = $2; $$ = ( INDDEFMODE | 07 ); im2flag = 1;
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RELOMOVE(rel_2, relonami);
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}
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;
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fopr1
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: fopr2
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{ $$ = $1; exp_1 = exp_2; im1flag = im2flag; im2flag=0;
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RELOMOVE(rel_1, rel_2);
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}
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;
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fopr2
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: fregister
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| fop2
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;
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fop2
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: FRSP
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| op2
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;
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ari
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: '(' REG ')'
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{ $$ = $2; }
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;
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ainc
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: ari '+'
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;
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adec
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: '-' ari
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{ $$ = $2; }
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;
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fregister
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: FREG
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| REG
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;
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