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verilog: support for time scale delay values

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Zachary Snow 2022-02-11 22:57:31 +01:00 • committed by Zachary Snow
parent 68c67c40ec
commit 15a4e900b2
4 changed files with 42 additions and 4 deletions
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15
frontends/verilog/verilog_lexer.l
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@ -128,6 +128,11 @@ static bool isUserType(std::string &s)
%x IMPORT_DPI
%x BASED_CONST
UNSIGNED_NUMBER [0-9][0-9_]*
FIXED_POINT_NUMBER_DEC [0-9][0-9_]*\.[0-9][0-9_]*([eE][-+]?[0-9_]+)?
FIXED_POINT_NUMBER_NO_DEC [0-9][0-9_]*[eE][-+]?[0-9_]+
TIME_SCALE_SUFFIX [munpf]?s
%%
// Initialise comment_caller to something to avoid a "maybe undefined"
// warning from GCC.
@ -297,7 +302,7 @@ static bool isUserType(std::string &s)
"union" { SV_KEYWORD(TOK_UNION); }
"packed" { SV_KEYWORD(TOK_PACKED); }
[0-9][0-9_]* {
{UNSIGNED_NUMBER} {
yylval->string = new std::string(yytext);
return TOK_CONSTVAL;
}
@ -319,12 +324,12 @@ static bool isUserType(std::string &s)
return TOK_BASED_CONSTVAL;
}
[0-9][0-9_]*\.[0-9][0-9_]*([eE][-+]?[0-9_]+)? {
{FIXED_POINT_NUMBER_DEC} {
yylval->string = new std::string(yytext);
return TOK_REALVAL;
}
[0-9][0-9_]*[eE][-+]?[0-9_]+ {
{FIXED_POINT_NUMBER_NO_DEC} {
yylval->string = new std::string(yytext);
return TOK_REALVAL;
}
@ -574,6 +579,10 @@ import[ \t\r\n]+\"(DPI|DPI-C)\"[ \t\r\n]+function[ \t\r\n]+ {
return TOK_SPECIFY_AND;
}
{UNSIGNED_NUMBER}{TIME_SCALE_SUFFIX} { return TOK_TIME_SCALE; }
{FIXED_POINT_NUMBER_DEC}{TIME_SCALE_SUFFIX} { return TOK_TIME_SCALE; }
{FIXED_POINT_NUMBER_NO_DEC}{TIME_SCALE_SUFFIX} { return TOK_TIME_SCALE; }
<INITIAL,BASED_CONST>"/*" { comment_caller=YY_START; BEGIN(COMMENT); }
<COMMENT>. /* ignore comment body */
<COMMENT>\n /* ignore comment body */

5
frontends/verilog/verilog_parser.y
View file

@ -369,7 +369,7 @@ static void rewriteGenForDeclInit(AstNode *loop)
%token TOK_BIT_OR_ASSIGN TOK_BIT_AND_ASSIGN TOK_BIT_XOR_ASSIGN TOK_ADD_ASSIGN
%token TOK_SUB_ASSIGN TOK_DIV_ASSIGN TOK_MOD_ASSIGN TOK_MUL_ASSIGN
%token TOK_SHL_ASSIGN TOK_SHR_ASSIGN TOK_SSHL_ASSIGN TOK_SSHR_ASSIGN
%token TOK_BIND
%token TOK_BIND TOK_TIME_SCALE
%type <ast> range range_or_multirange non_opt_range non_opt_multirange
%type <ast> wire_type expr basic_expr concat_list rvalue lvalue lvalue_concat_list non_io_wire_type io_wire_type
@ -779,6 +779,9 @@ non_opt_delay:
'#' TOK_ID { delete $2; } |
'#' TOK_CONSTVAL { delete $2; } |
'#' TOK_REALVAL { delete $2; } |
// our `expr` doesn't have time_scale, so we need the parenthesized variant
'#' TOK_TIME_SCALE |
'#' '(' TOK_TIME_SCALE ')' |
'#' '(' mintypmax_expr ')' |
'#' '(' mintypmax_expr ',' mintypmax_expr ')' |
'#' '(' mintypmax_expr ',' mintypmax_expr ',' mintypmax_expr ')';