mirror of https://github.com/YosysHQ/yosys.git
123 lines
3.5 KiB
Plaintext
123 lines
3.5 KiB
Plaintext
/*
|
|
* yosys -- Yosys Open SYnthesis Suite
|
|
*
|
|
* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* ---
|
|
*
|
|
* A very simple and straightforward frontend for the RTLIL text
|
|
* representation (as generated by the 'ilang' backend).
|
|
*
|
|
*/
|
|
|
|
%{
|
|
#include "kernel/rtlil.h"
|
|
#include "parser.tab.h"
|
|
%}
|
|
|
|
%option yylineno
|
|
%option noyywrap
|
|
%option nounput
|
|
%option prefix="rtlil_frontend_ilang_yy"
|
|
|
|
%x STRING
|
|
|
|
%%
|
|
|
|
"module" { return TOK_MODULE; }
|
|
"attribute" { return TOK_ATTRIBUTE; }
|
|
"parameter" { return TOK_PARAMETER; }
|
|
"wire" { return TOK_WIRE; }
|
|
"memory" { return TOK_MEMORY; }
|
|
"auto" { return TOK_AUTO; }
|
|
"width" { return TOK_WIDTH; }
|
|
"offset" { return TOK_OFFSET; }
|
|
"size" { return TOK_SIZE; }
|
|
"input" { return TOK_INPUT; }
|
|
"output" { return TOK_OUTPUT; }
|
|
"inout" { return TOK_INOUT; }
|
|
"cell" { return TOK_CELL; }
|
|
"connect" { return TOK_CONNECT; }
|
|
"switch" { return TOK_SWITCH; }
|
|
"case" { return TOK_CASE; }
|
|
"assign" { return TOK_ASSIGN; }
|
|
"sync" { return TOK_SYNC; }
|
|
"low" { return TOK_LOW; }
|
|
"high" { return TOK_HIGH; }
|
|
"posedge" { return TOK_POSEDGE; }
|
|
"negedge" { return TOK_NEGEDGE; }
|
|
"edge" { return TOK_EDGE; }
|
|
"always" { return TOK_ALWAYS; }
|
|
"update" { return TOK_UPDATE; }
|
|
"process" { return TOK_PROCESS; }
|
|
"end" { return TOK_END; }
|
|
|
|
[a-z]+ { return TOK_INVALID; }
|
|
|
|
"\\"[^ \t\r\n]+ { rtlil_frontend_ilang_yylval.string = strdup(yytext); return TOK_ID; }
|
|
"$"[^ \t\r\n]+ { rtlil_frontend_ilang_yylval.string = strdup(yytext); return TOK_ID; }
|
|
"."[0-9]+ { rtlil_frontend_ilang_yylval.string = strdup(yytext); return TOK_ID; }
|
|
|
|
[0-9]+'[01xzm-]+ { rtlil_frontend_ilang_yylval.string = strdup(yytext); return TOK_VALUE; }
|
|
[0-9]+ { rtlil_frontend_ilang_yylval.integer = atoi(yytext); return TOK_INT; }
|
|
|
|
\" { BEGIN(STRING); }
|
|
<STRING>\\. { yymore(); }
|
|
<STRING>\" {
|
|
BEGIN(0);
|
|
char *yystr = strdup(yytext);
|
|
yystr[strlen(yytext) - 1] = 0;
|
|
int i = 0, j = 0;
|
|
while (yystr[i]) {
|
|
if (yystr[i] == '\\' && yystr[i + 1]) {
|
|
i++;
|
|
if (yystr[i] == 'n')
|
|
yystr[i] = '\n';
|
|
else if (yystr[i] == 't')
|
|
yystr[i] = '\t';
|
|
else if ('0' <= yystr[i] && yystr[i] <= '7') {
|
|
yystr[i] = yystr[i] - '0';
|
|
if ('0' <= yystr[i + 1] && yystr[i + 1] <= '7') {
|
|
yystr[i + 1] = yystr[i] * 8 + yystr[i + 1] - '0';
|
|
i++;
|
|
}
|
|
if ('0' <= yystr[i + 1] && yystr[i + 1] <= '7') {
|
|
yystr[i + 1] = yystr[i] * 8 + yystr[i + 1] - '0';
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
yystr[j++] = yystr[i++];
|
|
}
|
|
yystr[j] = 0;
|
|
rtlil_frontend_ilang_yylval.string = yystr;
|
|
return TOK_STRING;
|
|
}
|
|
<STRING>. { yymore(); }
|
|
|
|
"#"[^\n]*\n /* ignore comments */
|
|
[ \t] /* ignore non-newline whitespaces */
|
|
[\r\n]+ { return TOK_EOL; }
|
|
|
|
. { return *yytext; }
|
|
|
|
%%
|
|
|
|
// this is a hack to avoid the 'yyinput defined but not used' error msgs
|
|
void *rtlil_frontend_ilang_avoid_input_warnings() {
|
|
return (void*)&yyinput;
|
|
}
|
|
|