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Add support for length attribute #28

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Add support for length attribute #28

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1 change: 1 addition & 0 deletions src/vhd2vl.l
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Original file line number Diff line number Diff line change
Expand Up @@ -88,6 +88,7 @@ int scan_int(char *s);
"in" { return IN; }
"inout" { return INOUT; }
"is" { return IS; }
"length" { return LENGTH; }
"library ".*\n { lineno++; }
"loop" { return LOOP; }
"map" { return MAP; }
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18 changes: 17 additions & 1 deletion src/vhd2vl.y
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Expand Up @@ -889,7 +889,7 @@ slist *emit_io_list(slist *sl)
%token <txt> FOR LOOP GENERATE
%token <txt> AFTER AND OR NAND NOR XOR XNOR MOD RW_REM POW
%token <txt> LASTVALUE EVENT POSEDGE NEGEDGE
%token <txt> STRING NAME RANGE NULLV OPEN
%token <txt> STRING NAME RANGE LENGTH NULLV OPEN
%token <txt> CONVFUNC_1 CONVFUNC_2 BASED FLOAT LEFT
%token <txt> SCIENTIFIC REAL
%token <txt> ASSERT REPORT SEVERITY WARNING ERROR FAILURE NOTE
Expand Down Expand Up @@ -2465,6 +2465,22 @@ expr : signal {
/* two argument type conversion e.g. to_unsigned(x, 3) */
$$ = addnest($3);
}
| NAME '\'' LENGTH {
/* lookup NAME and copy its length */
sglist *sg = NULL;
if ((sg=lookup(io_list,$1))==NULL) {
sg=lookup(sig_list,$1);
}
if(sg) {
expdata *e=xmalloc(sizeof(expdata));
e->op='t'; /* Terminal symbol */
e->sl=addval(NULL,sg->range->sizeval);
$$ = e;
} else {
fprintf(stderr,"ERROR (line %d): undefined length \"%s'length\".\n", lineno, $1);
YYABORT;
}
}
| '(' expr ')' {
$$ = addnest($2);
}
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