213 lines
3.7 KiB
C
213 lines
3.7 KiB
C
#define RCSID4 "$Header$"
|
|
|
|
/*
|
|
* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
*
|
|
* This product is part of the Amsterdam Compiler Kit.
|
|
*
|
|
* Permission to use, sell, duplicate or disclose this software must be
|
|
* obtained in writing. Requests for such permissions may be sent to
|
|
*
|
|
* Dr. Andrew S. Tanenbaum
|
|
* Wiskundig Seminarium
|
|
* Vrije Universiteit
|
|
* Postbox 7161
|
|
* 1007 MC Amsterdam
|
|
* The Netherlands
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Motorola 6809 parsing rules
|
|
*/
|
|
|
|
operation
|
|
: SETDP expr
|
|
{ dpvalue = $2.val;}
|
|
|
|
|
NOARG
|
|
{ emit1or2($1);}
|
|
|
|
|
BRANCH expr
|
|
{ branch($1,$2);}
|
|
|
|
|
LBRNCH expr
|
|
{ emit1(0x10); emit1($1);
|
|
$2.val -= (DOTVAL+2);
|
|
#ifdef RELOCATION
|
|
if (rflag != 0 && PASS_RELO)
|
|
newrelo($2.typ, RELPC|RELO2|RELBR);
|
|
#endif
|
|
emit2($2.val);
|
|
}
|
|
|
|
|
SBRNCH expr
|
|
{ emit1($1);
|
|
$2.val -= (DOTVAL+2);
|
|
#ifdef RELOCATION
|
|
if (rflag != 0 && PASS_RELO)
|
|
newrelo($2.typ, RELPC|RELO2|RELBR);
|
|
#endif
|
|
emit2($2.val);
|
|
}
|
|
|
|
|
IMMED '#' expr
|
|
{ emit1($1);
|
|
#ifdef RELOCATION
|
|
if (rflag != 0 && PASS_RELO)
|
|
newrelo($3.typ, RELO1);
|
|
#endif
|
|
emit1($3.val);
|
|
}
|
|
|
|
|
XOP '#' expr
|
|
{ emit1or2($1 - 0x20);
|
|
switch ($1 & 0x0F) {
|
|
case 0x03:
|
|
case 0x0C:
|
|
case 0x0E:
|
|
#ifdef RELOCATION
|
|
if (rflag != 0 && PASS_RELO)
|
|
newrelo($3.typ, RELO2|RELBR);
|
|
#endif
|
|
emit2($3.val);
|
|
break;
|
|
default:
|
|
#ifdef RELOCATION
|
|
if (rflag != 0 && PASS_RELO)
|
|
newrelo($3.typ, RELO1);
|
|
#endif
|
|
emit1($3.val);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
XOP '<' expr
|
|
{ if (0 <= $1 && $1 < 0x80)
|
|
emit1(($1-0x10) & 0x3F);
|
|
else
|
|
emit1or2($1 - 0x10);
|
|
#ifdef RELOCATION
|
|
if (rflag != 0 && PASS_RELO)
|
|
newrelo($3.typ, RELO1);
|
|
#endif
|
|
emit1($3.val);
|
|
}
|
|
|
|
|
XOP '>' expr
|
|
{ emit1or2($1 + 0x10);
|
|
#ifdef RELOCATION
|
|
if (rflag != 0 && PASS_RELO)
|
|
newrelo($3.typ, RELO2|RELBR);
|
|
#endif
|
|
emit2($3.val);
|
|
}
|
|
|
|
|
STACK reglist
|
|
{ emit1($1); emit1($2);}
|
|
|
|
|
TWOREG REG ',' REG
|
|
{
|
|
emit1($1);
|
|
emit1($2 << 4 | $4);
|
|
}
|
|
|
|
|
XOP REG
|
|
{ switch ($2) {
|
|
case A: emit1($1 - 0x20);
|
|
break;
|
|
case B: emit1($1 - 0x10);
|
|
break;
|
|
default:serror("register error");
|
|
}
|
|
}
|
|
|
|
|
XOP expr ',' REG
|
|
{ emit1or2($1);
|
|
offset($4,$2,0);
|
|
}
|
|
|
|
|
XOP '(' expr ',' REG ')'
|
|
{ emit1or2($1);
|
|
offset($5,$3,0x10);
|
|
}
|
|
|
|
|
XOP '(' expr ')'
|
|
{ emit1or2($1);
|
|
emit1(0x9F);
|
|
#ifdef RELOCATION
|
|
if (rflag != 0 && PASS_RELO)
|
|
newrelo($3.typ, RELO2|RELBR);
|
|
#endif
|
|
emit2($3.val);
|
|
}
|
|
|
|
|
XOP xmode
|
|
{ emit1or2($1);
|
|
emit1($2);
|
|
}
|
|
|
|
|
XOP '(' xmode ')'
|
|
{ if (($3 & 0x8D) == 0x80)
|
|
serror("invalid index mode");
|
|
emit1or2($1);
|
|
emit1($3 + 0x10);
|
|
}
|
|
|
|
|
XOP expr
|
|
{ if (($2.typ & S_TYP) == S_ABS &&
|
|
((unsigned)$2.val >> 8) == dpvalue
|
|
) {
|
|
if (0 <= $1 && $1 < 0x80)
|
|
emit1(($1-0x20) & 0x3F);
|
|
else
|
|
emit1or2($1 - 0x10);
|
|
emit1($2.val);
|
|
} else {
|
|
emit1or2($1 + 0x10);
|
|
#ifdef RELOCATION
|
|
if (rflag != 0 && PASS_RELO)
|
|
newrelo($2.typ, RELO2|RELBR);
|
|
#endif
|
|
emit2($2.val);
|
|
}
|
|
}
|
|
;
|
|
reglist : ALL
|
|
| REG
|
|
{ if (($$ = regbit[$1]) < 0) serror("register error");}
|
|
|
|
|
reglist ',' REG
|
|
{ register i;
|
|
if ((i = regbit[$3]) < 0 || ($1 & i) != 0)
|
|
serror("register error");
|
|
$$ = $1 | i;
|
|
}
|
|
;
|
|
xyus : REG
|
|
{ if (($$ = regno($1)) < 0) serror("register error");}
|
|
;
|
|
xmode : ',' xyus '+' '+'
|
|
{ $$ = 0x81 + $2;}
|
|
|
|
|
',' xyus '+'
|
|
{ $$ = 0x80 + $2;}
|
|
|
|
|
',' xyus
|
|
{ $$ = 0x84 + $2;}
|
|
|
|
|
',' '-' '-' xyus
|
|
{ $$ = 0x83 + $4;}
|
|
|
|
|
',' '-' xyus
|
|
{ $$ = 0x82 + $3;}
|
|
|
|
|
REG ',' xyus
|
|
{ switch($1) {
|
|
case A: $$ = 0x86 + $3; break;
|
|
case B: $$ = 0x85 + $3; break;
|
|
case D: $$ = 0x8B + $3; break;
|
|
default: serror("register error");
|
|
}
|
|
}
|
|
;
|