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Added support for macro arguments

This commit is contained in:
Clifford Wolf 2013-12-18 13:21:02 +01:00
parent 09bd82db21
commit 921064c200
2 changed files with 84 additions and 23 deletions
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58
frontends/verilog/preproc.cc
View File

@ -76,8 +76,9 @@ static char next_char()
return ch == '\r' ? next_char() : ch;
}
static void skip_spaces()
static std::string skip_spaces()
{
std::string spaces;
while (1) {
char ch = next_char();
if (ch == 0)
@ -86,7 +87,9 @@ static void skip_spaces()
return_char(ch);
break;
}
spaces += ch;
}
return spaces;
}
static std::string next_token(bool pass_newline = false)
@ -170,6 +173,7 @@ static std::string next_token(bool pass_newline = false)
else
{
const char *ok = "abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMNOPQRSTUVWXYZ$0123456789";
if (ch == '`' || strchr(ok, ch) != NULL)
while ((ch = next_char()) != 0) {
if (strchr(ok, ch) == NULL) {
return_char(ch);
@ -289,12 +293,29 @@ std::string frontend_verilog_preproc(FILE *f, std::string filename, const std::m
if (tok == "`define") {
std::string name, value;
std::map<std::string, int> args;
skip_spaces();
name = next_token(true);
skip_spaces();
int newline_count = 0;
int state = 0;
while (!tok.empty()) {
tok = next_token();
if (state == 0 && tok == "(") {
state = 1;
skip_spaces();
} else
if (state == 1) {
if (tok == ")")
state = 2;
else if (tok != ",") {
int arg_idx = args.size()+1;
args[tok] = arg_idx;
}
skip_spaces();
} else {
if (state != 2)
state = 3;
if (tok == "\n") {
return_char('\n');
break;
@ -309,8 +330,12 @@ std::string frontend_verilog_preproc(FILE *f, std::string filename, const std::m
return_char(ch);
}
} else
if (args.count(tok) > 0)
value += stringf("`macro_%s_arg%d", name.c_str(), args.at(tok));
else
value += tok;
}
}
while (newline_count-- > 0)
return_char('\n');
// printf("define: >>%s<< -> >>%s<<\n", name.c_str(), value.c_str());
@ -338,8 +363,35 @@ std::string frontend_verilog_preproc(FILE *f, std::string filename, const std::m
}
if (tok.size() > 1 && tok[0] == '`' && defines_map.count(tok.substr(1)) > 0) {
// printf("expand: >>%s<< -> >>%s<<\n", tok.c_str(), defines_map[tok.substr(1)].c_str());
insert_input(defines_map[tok.substr(1)]);
std::string name = tok.substr(1);
// printf("expand: >>%s<< -> >>%s<<\n", name.c_str(), defines_map[name].c_str());
std::string skipped_spaces = skip_spaces();
tok = next_token(true);
if (tok == "(") {
int level = 1;
std::vector<std::string> args;
args.push_back(std::string());
while (1)
{
tok = next_token(true);
if (tok == ")" || tok == "}" || tok == "]")
level--;
if (level == 0)
break;
if (level == 1 && tok == ",")
args.push_back(std::string());
else
args.back() += tok;
if (tok == "(" || tok == "{" || tok == "[")
level++;
}
for (size_t i = 0; i < args.size(); i++)
defines_map[stringf("macro_%s_arg%d", name.c_str(), i+1)] = args[i];
} else {
insert_input(tok);
insert_input(skipped_spaces);
}
insert_input(defines_map[name]);
continue;
}

9
tests/simple/macros.v Normal file
View File

@ -0,0 +1,9 @@
module test(a, y);
`define MSB_LSB_SEP :
`define get_msb(off, len) ((off)+(len)-1)
`define get_lsb(off, len) (off)
`define sel_bits(offset, len) `get_msb(offset, len) `MSB_LSB_SEP `get_lsb(offset, len)
input [31:0] a;
output [7:0] y;
assign y = a[`sel_bits(16, 8)];
endmodule