129 lines
2.3 KiB
C
129 lines
2.3 KiB
C
/* $Header: mach4.c, v1.9 15-Mar-89 AJM */
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operation : BRANCH optlink expr
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{branch($1, $2, $3.val);}
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| DATA1 optcond opts optp REG ',' REG ',' operand
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{data($1,$2|$3|$4|$5<<12|$7<<16,$9.val,$9.typ);}
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| DATA2 optcond opts optp REG ',' operand
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{data($1,$2|$3|$4|$5<<12,$7.val,$7.typ);}
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| DATA3 optcond opts optp REG ',' operand
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{data($1,$2|$3|$4|$5<<16,$7.val,$7.typ);}
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| SDT optcond optb optt REG ',' address
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{strldr($1,$2|$3|$4|$5<<12,$7);}
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| BDT optcond REG optexc ',' reglist optpsr
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{emit4($1|$2|$3<<16|$4|$6|$7);}
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| SWI optcond expr
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{emit4($1|$2|$3.val);}
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| ADR optcond REG ',' expr
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{calcadr($2,$3,$5.val,$5.typ);}
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| MUL optcond REG ',' REG ',' REG
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{emit4($1|$2|$3<<16|$5|$7<<8);}
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| MLA optcond REG ',' REG ',' REG ',' REG
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{emit4($1|$2|$3<<16|$5|$7<<8|$9<<12);}
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;
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optlink : {$$=0;}
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| LINK
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{$$=$1;}
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;
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optcond : {$$=0xE0000000;}
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| COND
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{$$=$1;}
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;
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opts : {$$=0;}
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| SET
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{$$=$1;}
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;
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optt : {$$=0;}
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| TRANS
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{$$=$1;}
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;
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optp : {$$=0;}
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| PEE
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{$$=$1;}
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;
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optb : {$$=0;}
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| BYTE
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{$$=$1;}
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;
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optexc : {$$=0;}
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| '<'
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{$$=0x00200000;}
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;
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optpsr : {$$=0;}
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| '^'
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{$$=0x00400000;}
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;
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operand : REG optshift
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{$$.val = $1|$2; $$.typ = S_REG;}
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| '#'expr
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{$$ = $2;}
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;
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optshift : ',' SHIFT shftcnt
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{$$ = $2|$3;}
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| ',' RRX
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{$$ = $2;}
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{$$ = 0;}
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;
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aoptshift : ',' SHIFT '#' expr
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{$$ = $2|calcshft($4.val, $4.typ, $<y_word>0);}
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| ',' RRX
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{$$ = $2;}
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{$$ = 0;}
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;
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shftcnt : '#' expr
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{$$ = calcshft($2.val, $2.typ, $<y_word>0);}
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| REG
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{$$ = $1<<8|0x10;}
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;
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address : expr
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{success = 0; $$ = $1.val;}
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| '[' REG ']'
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{success = 1; $$ = 0x01000000|$2<<16;}
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| '[' REG ',' offset ']' optexc
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{success = 1; $$ = $2<<16|$4|$6|0x01000000;}
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| '[' REG ']' ',' offset
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{success = 1; $$ = $2<<16|$5;}
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;
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offset : '#' expr
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{$$ = calcoffset($2.val);}
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| optsign REG aoptshift
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{$$ = 0x02000000|$1|$2|$3;}
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;
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optsign : {$$ = 0x00800000;}
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| '+'
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{$$ = 0x00800000;}
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| '-'
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{$$ = 0x0;}
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;
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reglist : '{' rlist '}'
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{$$ = $2;}
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;
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rlist : REG
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{$$ = 1<<$1;}
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| rlist ',' REG
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{$$ = $1|1<<$3;}
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| REG '-' REG
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{
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for ($$ = 0; $1 <= $3; $1++)
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$$ |= (1<<$1);
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}
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;
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