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ack/mach/vax4/as/mach4.c

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/*
* (c) copyright 1990 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
#define RCSID4 "$Header$"
/*
* VAX-11 machine dependent yacc syntax rules
*/
/* Branch instructions with as yet unknown size get special treatment */
operation
:
{ op_ind = 0; }
oper
{ if ((unsigned) $2 < 0x100) {
emit1((int)$2);
}
else {
emit1((int)$2&0xff);
emit1((int)$2>>8);
}
operands();
}
| OP1_Bx expr { branch($1, $2); }
| OP1_Be expr { op_ind = 0; ext_branch($1, $2); }
| OP2_l_Be { op_ind = 0; opnd[0].size = 4; }
opnd ',' expr
{ ext_branch($1, $5); }
| OP3_l_V_Be { op_ind = 0; opnd[0].size = 4;
opnd[1].size = -1;
}
opnd ',' opnd ',' expr
{ ext_branch($1, $7); }
;
OP1_O
: OP1_X { opnd[0].size = $1>>16; $$ = $1 & 0xffff; }
| OP1_A { opnd[0].size = -2; $$ = $1; }
| OP1_u { opnd[0].size = 0; $$ = $1; }
;
OP1_B
: OP1_BX { opnd[0].size = $1>>16; $$ = $1 & 0xffff; }
;
OP2_O_O
: OP2_b_b { opnd[0].size = 1; opnd[1].size = 1; $$ = $1; }
| OP2_b_l { opnd[0].size = 1; opnd[1].size = 4; $$ = $1; }
| OP2_b_u { opnd[0].size = 1; opnd[1].size = 0; $$ = $1; }
| OP2_b_w { opnd[0].size = 1; opnd[1].size = 2; $$ = $1; }
| OP2_l_b { opnd[0].size = 4; opnd[1].size = 1; $$ = $1; }
| OP2_l_l { opnd[0].size = 4; opnd[1].size = 4; $$ = $1; }
| OP2_l_u { opnd[0].size = 4; opnd[1].size = 0; $$ = $1; }
| OP2_l_w { opnd[0].size = 4; opnd[1].size = 2; $$ = $1; }
| OP2_u_b { opnd[0].size = 0; opnd[1].size = 1; $$ = $1; }
| OP2_u_l { opnd[0].size = 0; opnd[1].size = 4; $$ = $1; }
| OP2_u_u { opnd[0].size = 0; opnd[1].size = 0; $$ = $1; }
| OP2_u_w { opnd[0].size = 0; opnd[1].size = 2; $$ = $1; }
| OP2_w_b { opnd[0].size = 2; opnd[1].size = 1; $$ = $1; }
| OP2_w_l { opnd[0].size = 2; opnd[1].size = 4; $$ = $1; }
| OP2_w_u { opnd[0].size = 2; opnd[1].size = 0; $$ = $1; }
| OP2_w_w { opnd[0].size = 2; opnd[1].size = 2; $$ = $1; }
| OP2_A_l { opnd[0].size = -2;opnd[1].size = 4; $$ = $1; }
| OP2_l_A { opnd[0].size = 4; opnd[1].size = -2;$$ = $1; }
| OP2_A_A { opnd[0].size = -2;opnd[1].size = -2;$$ = $1; }
;
OP2_O_B
: OP2_l_Bb { opnd[0].size = 4; opnd[1].size = 1; $$ = $1; }
;
OP3_O_O_O
: OP3_b_b_b { opnd[0].size = 1; opnd[1].size = 1;
opnd[2].size = 1; $$ = $1;
}
| OP3_b_l_l { opnd[0].size = 1; opnd[1].size = 4;
opnd[2].size = 4; $$ = $1;
}
| OP3_b_u_u { opnd[0].size = 1; opnd[1].size = 0;
opnd[2].size = 0; $$ = $1;
}
| OP3_l_l_l { opnd[0].size = 4; opnd[1].size = 4;
opnd[2].size = 4; $$ = $1;
}
| OP3_u_u_u { opnd[0].size = 0; opnd[1].size = 0;
opnd[2].size = 0; $$ = $1;
}
| OP3_w_w_w { opnd[0].size = 2; opnd[1].size = 2;
opnd[2].size = 2; $$ = $1;
}
| OP3_b_w_A { opnd[0].size = 1; opnd[1].size = 2;
opnd[2].size = -2; $$ = $1;
}
| OP3_l_w_A { opnd[0].size = 4; opnd[1].size = 2;
opnd[2].size = -2; $$ = $1;
}
| OP3_u_w_A { opnd[0].size = 0; opnd[1].size = 2;
opnd[2].size = -2; $$ = $1;
}
| OP3_w_A_A { opnd[0].size = 2; opnd[1].size = -2;
opnd[2].size = -2; $$ = $1;
}
| OP3_w_A_l { opnd[0].size = 2; opnd[1].size = -2;
opnd[2].size = 4; $$ = $1;
}
;
OP3_O_O_B
: OP3_l_l_Bb { opnd[0].size = 4; opnd[1].size = 4;
opnd[2].size = 1; $$ = $1;
}
| OP3_l_V_Bb { opnd[0].size = 4; opnd[1].size = -1;
opnd[2].size = 1; $$ = $1;
}
;
OP4_O_O_O_O
: OP4_l_b_V_l { opnd[0].size = 4; opnd[1].size = 1;
opnd[2].size = -1; opnd[3].size = 4;
$$ = $1;
}
| OP4_l_l_b_V { opnd[0].size = 4; opnd[1].size = 4;
opnd[2].size = 1; opnd[3].size = -1;
$$ = $1;
}
| OP4_l_l_l_u { opnd[0].size = 4; opnd[1].size = 4;
opnd[2].size = 4; opnd[3].size = 0;
$$ = $1;
}
| OP4_l_u_l_l { opnd[0].size = 4; opnd[1].size = 0;
opnd[2].size = 4; opnd[3].size = 4;
$$ = $1;
}
| OP4_w_A_w_A { opnd[0].size = 2; opnd[1].size = -2;
opnd[2].size = 2; opnd[3].size = -2;
$$ = $1;
}
| OP4_w_A_A_A { opnd[0].size = 2; opnd[1].size = -2;
opnd[2].size = -2; opnd[3].size = -2;
$$ = $1;
}
| OP4_A_l_w_A { opnd[0].size = -2; opnd[1].size = 4;
opnd[2].size = 2; opnd[3].size = -2;
$$ = $1;
}
| OP4_w_A_A_b { opnd[0].size = 2; opnd[1].size = -2;
opnd[2].size = -2; opnd[3].size = 1;
$$ = $1;
}
;
OP4_O_O_O_B
: OP4_b_b_b_Bw { opnd[0].size = 1; opnd[1].size = 1;
opnd[2].size = 1; opnd[3].size = 2;
$$ = $1;
}
| OP4_l_l_l_Bw { opnd[0].size = 4; opnd[1].size = 4;
opnd[2].size = 4; opnd[3].size = 2;
$$ = $1;
}
| OP4_u_u_u_Bw { opnd[0].size = 0; opnd[1].size = 0;
opnd[2].size = 0; opnd[3].size = 2;
$$ = $1;
}
| OP4_w_w_w_Bw { opnd[0].size = 2; opnd[1].size = 2;
opnd[2].size = 2; opnd[3].size = 2;
$$ = $1;
}
;
OP5_O_O_O_O_O
: OP5_u_b_u_l_u { opnd[0].size = 0; opnd[1].size = 1;
opnd[2].size = 0; opnd[3].size = 4;
opnd[4].size = 0; $$ = $1;
}
| OP5_u_w_u_l_u { opnd[0].size = 0; opnd[1].size = 2;
opnd[2].size = 0; opnd[3].size = 4;
opnd[4].size = 0; $$ = $1;
}
| OP5_w_A_A_w_A { opnd[0].size = 2; opnd[1].size = -2;
opnd[2].size = -2; opnd[3].size = 2;
opnd[4].size = -2; $$ = $1;
}
| OP5_w_A_b_w_A { opnd[0].size = 2; opnd[1].size = -2;
opnd[2].size = 1; opnd[3].size = 2;
opnd[4].size = -2; $$ = $1;
}
;
OP6_O_O_O_O_O_O
: OP6_l_l_l_l_l_l { opnd[0].size = 4; opnd[1].size = 4;
opnd[2].size = 4; opnd[3].size = 4;
opnd[4].size = 4; opnd[5].size = 4;
$$ = $1;
}
| OP6_w_A_b_A_w_A { opnd[0].size = 2; opnd[1].size = -2;
opnd[2].size = 1; opnd[3].size = -2;
opnd[4].size = 2; opnd[5].size = -2;
$$ = $1;
}
| OP6_w_A_w_A_w_A { opnd[0].size = 2; opnd[1].size = -2;
opnd[2].size = 2; opnd[3].size = -2;
opnd[4].size = 2; opnd[5].size = -2;
$$ = $1;
}
| OP6_b_w_A_b_w_A { opnd[0].size = 1; opnd[1].size = 2;
opnd[2].size = -2; opnd[3].size = 1;
opnd[4].size = 2; opnd[5].size = -2;
$$ = $1;
}
;
CASE_O_O_O
: CASE_X_X_X { opnd[0].size = ($1>>16);
opnd[1].size = ($1>>16);
opnd[2].size = ($1>>16);
$$ = $1 & 0xffff;
}
;
oper
: OP0
| OP1_O opnd { $$ = $1; }
| OP1_B expr { $$ = $1;
opnd[0].exp = $2;
RELOMOVE(opnd[0].relo, relonami);
opnd[0].mode = DISPL;
op_ind = 1;
}
| OP2_O_O opnd ',' opnd
{ $$ = $1; }
| OP2_O_B opnd ',' expr
{ $$ = $1;
opnd[op_ind].exp = $4;
RELOMOVE(opnd[op_ind].relo, relonami);
opnd[op_ind].mode = DISPL;
op_ind++;
}
| OP3_O_O_O opnd ',' opnd ',' opnd
{ $$ = $1; }
| OP3_O_O_B opnd ',' opnd ',' expr
{ $$ = $1;
opnd[op_ind].exp = $6;
RELOMOVE(opnd[op_ind].relo, relonami);
opnd[op_ind].mode = DISPL;
op_ind++;
}
| OP4_O_O_O_O opnd ',' opnd ',' opnd ',' opnd
{ $$ = $1; }
| OP4_O_O_O_B opnd ',' opnd ',' opnd ',' expr
{ $$ = $1;
opnd[op_ind].exp = $8;
RELOMOVE(opnd[op_ind].relo, relonami);
opnd[op_ind].mode = DISPL;
op_ind++;
}
| OP5_O_O_O_O_O opnd ',' opnd ',' opnd ',' opnd ',' opnd
{ $$ = $1; }
| OP6_O_O_O_O_O_O opnd ',' opnd ',' opnd ',' opnd ',' opnd ',' opnd
{ $$ = $1; }
| CASE_O_O_O opnd ',' opnd ',' opnd
{ $$ = $1; }
;
opnd
: REG { opnd[op_ind].mode = REG_MODE;
opnd[op_ind].reg = $1;
opnd[op_ind].index_reg = -1;
op_ind++;
}
| eax { opnd[op_ind].index_reg = -1;
op_ind++;
}
| eax '[' REG ']' { opnd[op_ind].index_reg = $3;
op_ind++;
}
;
eax
: '$' expr { opnd[op_ind].mode = IMM;
opnd[op_ind].exp = $2;
opnd[op_ind].index_reg = -1;
RELOMOVE(opnd[op_ind].relo, relonami);
}
| '*' expr { opnd[op_ind].exp = $2;
opnd[op_ind].mode = REL_DEF;
RELOMOVE(opnd[op_ind].relo, relonami);
}
| expr { opnd[op_ind].exp = $1;
opnd[op_ind].mode = REL;
RELOMOVE(opnd[op_ind].relo, relonami);
}
| '*' '$' expr { opnd[op_ind].mode = ABS;
opnd[op_ind].exp = $3;
opnd[op_ind].index_reg = -1;
RELOMOVE(opnd[op_ind].relo, relonami);
}
| '(' REG ')' { opnd[op_ind].mode = REGDEF_MODE;
opnd[op_ind].reg = $2;
}
| '(' REG ')' '+' { opnd[op_ind].mode = AI_MODE;
opnd[op_ind].reg = $2;
}
| '*' '(' REG ')' '+'
{ opnd[op_ind].mode = AI_DEF_MODE;
opnd[op_ind].reg = $3;
}
| '-' '(' REG ')' { opnd[op_ind].mode = AD_MODE;
opnd[op_ind].reg = $3;
}
| expr '(' REG ')'
{ opnd[op_ind].exp = $1;
opnd[op_ind].mode = DISPLL_MODE;
opnd[op_ind].reg = $3;
RELOMOVE(opnd[op_ind].relo, relonami);
}
| '*' expr '(' REG ')'
{ opnd[op_ind].exp = $2;
opnd[op_ind].mode = DISPLL_DEF_MODE;
opnd[op_ind].reg = $4;
RELOMOVE(opnd[op_ind].relo, relonami);
}
;
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