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-rw-r--r--passes/techmap/libparse.cc200
1 files changed, 172 insertions, 28 deletions
diff --git a/passes/techmap/libparse.cc b/passes/techmap/libparse.cc
index d5254c029..349ccc115 100644
--- a/passes/techmap/libparse.cc
+++ b/passes/techmap/libparse.cc
@@ -24,6 +24,7 @@
#include <istream>
#include <fstream>
#include <iostream>
+#include <sstream>
#ifndef FILTERLIB
#include "kernel/log.h"
@@ -86,12 +87,14 @@ int LibertyParser::lexer(std::string &str)
{
int c;
+ // eat whitespace
do {
c = f.get();
} while (c == ' ' || c == '\t' || c == '\r');
+ // search for identifiers, numbers, plus or minus.
if (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || c == '_' || c == '-' || c == '+' || c == '.') {
- str = c;
+ str = static_cast<char>(c);
while (1) {
c = f.get();
if (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || c == '_' || c == '-' || c == '+' || c == '.')
@@ -100,10 +103,19 @@ int LibertyParser::lexer(std::string &str)
break;
}
f.unget();
- // fprintf(stderr, "LEX: identifier >>%s<<\n", str.c_str());
- return 'v';
+ if (str == "+" || str == "-") {
+ /* Single operator is not an identifier */
+ // fprintf(stderr, "LEX: char >>%s<<\n", str.c_str());
+ return str[0];
+ }
+ else {
+ // fprintf(stderr, "LEX: identifier >>%s<<\n", str.c_str());
+ return 'v';
+ }
}
+ // if it wasn't an identifer, number of array range,
+ // maybe it's a string?
if (c == '"') {
str = "";
while (1) {
@@ -118,9 +130,10 @@ int LibertyParser::lexer(std::string &str)
return 'v';
}
+ // if it wasn't a string, perhaps it's a comment or a forward slash?
if (c == '/') {
c = f.get();
- if (c == '*') {
+ if (c == '*') { // start of '/*' block comment
int last_c = 0;
while (c > 0 && (last_c != '*' || c != '/')) {
last_c = c;
@@ -129,7 +142,7 @@ int LibertyParser::lexer(std::string &str)
line++;
}
return lexer(str);
- } else if (c == '/') {
+ } else if (c == '/') { // start of '//' line comment
while (c > 0 && c != '\n')
c = f.get();
line++;
@@ -137,24 +150,31 @@ int LibertyParser::lexer(std::string &str)
}
f.unget();
// fprintf(stderr, "LEX: char >>/<<\n");
- return '/';
+ return '/'; // a single '/' charater.
}
+ // check for a backslash
if (c == '\\') {
- c = f.get();
+ c = f.get();
if (c == '\r')
c = f.get();
- if (c == '\n')
+ if (c == '\n') {
+ line++;
return lexer(str);
+ }
f.unget();
return '\\';
}
+ // check for a new line
if (c == '\n') {
line++;
- return ';';
+ return 'n';
}
+ // anything else, such as ';' will get passed
+ // through as literal items.
+
// if (c >= 32 && c < 255)
// fprintf(stderr, "LEX: char >>%c<<\n", c);
// else
@@ -168,14 +188,39 @@ LibertyAst *LibertyParser::parse()
int tok = lexer(str);
- while (tok == ';')
+ // there are liberty files in the wild that
+ // have superfluous ';' at the end of
+ // a { ... }. We simply ignore a ';' here.
+ // and get to the next statement.
+
+ while ((tok == 'n') || (tok == ';'))
tok = lexer(str);
if (tok == '}' || tok < 0)
return NULL;
- if (tok != 'v')
- error();
+ if (tok != 'v') {
+ std::string eReport;
+ switch(tok)
+ {
+ case 'n':
+ error("Unexpected newline.");
+ break;
+ case '[':
+ case ']':
+ case '}':
+ case '{':
+ case '\"':
+ case ':':
+ eReport = "Unexpected '";
+ eReport += static_cast<char>(tok);
+ eReport += "'.";
+ error(eReport);
+ break;
+ default:
+ error();
+ }
+ }
LibertyAst *ast = new LibertyAst;
ast->id = str;
@@ -184,13 +229,33 @@ LibertyAst *LibertyParser::parse()
{
tok = lexer(str);
- if (tok == ';')
+ // allow both ';' and new lines to
+ // terminate a statement.
+ if ((tok == ';') || (tok == 'n'))
break;
if (tok == ':' && ast->value.empty()) {
tok = lexer(ast->value);
if (tok != 'v')
error();
+ tok = lexer(str);
+ while (tok == '+' || tok == '-' || tok == '*' || tok == '/') {
+ ast->value += tok;
+ tok = lexer(str);
+ if (tok != 'v')
+ error();
+ ast->value += str;
+ tok = lexer(str);
+ }
+
+ // In a liberty file, all key : value pairs should end in ';'
+ // However, there are some liberty files in the wild that
+ // just have a newline. We'll be kind and accept a newline
+ // instead of the ';' too..
+ if ((tok == ';') || (tok == 'n'))
+ break;
+ else
+ error();
continue;
}
@@ -202,8 +267,70 @@ LibertyAst *LibertyParser::parse()
continue;
if (tok == ')')
break;
- if (tok != 'v')
- error();
+
+ // FIXME: the AST needs to be extended to store
+ // these vector ranges.
+ if (tok == '[')
+ {
+ // parse vector range [A] or [A:B]
+ std::string arg;
+ tok = lexer(arg);
+ if (tok != 'v')
+ {
+ // expected a vector array index
+ error("Expected a number.");
+ }
+ else
+ {
+ // fixme: check for number A
+ }
+ tok = lexer(arg);
+ // optionally check for : in case of [A:B]
+ // if it isn't we just expect ']'
+ // as we have [A]
+ if (tok == ':')
+ {
+ tok = lexer(arg);
+ if (tok != 'v')
+ {
+ // expected a vector array index
+ error("Expected a number.");
+ }
+ else
+ {
+ // fixme: check for number B
+ tok = lexer(arg);
+ }
+ }
+ // expect a closing bracket of array range
+ if (tok != ']')
+ {
+ error("Expected ']' on array range.");
+ }
+ continue;
+ }
+ if (tok != 'v') {
+ std::string eReport;
+ switch(tok)
+ {
+ case 'n':
+ error("Unexpected newline.");
+ break;
+ case '[':
+ case ']':
+ case '}':
+ case '{':
+ case '\"':
+ case ':':
+ eReport = "Unexpected '";
+ eReport += static_cast<char>(tok);
+ eReport += "'.";
+ error(eReport);
+ break;
+ default:
+ error();
+ }
+ }
ast->args.push_back(arg);
}
continue;
@@ -229,14 +356,31 @@ LibertyAst *LibertyParser::parse()
void LibertyParser::error()
{
- log_error("Syntax error in line %d.\n", line);
+ log_error("Syntax error in liberty file on line %d.\n", line);
+}
+
+void LibertyParser::error(const std::string &str)
+{
+ std::stringstream ss;
+ ss << "Syntax error in liberty file on line " << line << ".\n";
+ ss << " " << str << "\n";
+ log_error("%s", ss.str().c_str());
}
#else
void LibertyParser::error()
{
- fprintf(stderr, "Syntax error in line %d.\n", line);
+ fprintf(stderr, "Syntax error in liberty file on line %d.\n", line);
+ exit(1);
+}
+
+void LibertyParser::error(const std::string &str)
+{
+ std::stringstream ss;
+ ss << "Syntax error in liberty file on line " << line << ".\n";
+ ss << " " << str << "\n";
+ printf("%s", ss.str().c_str());
exit(1);
}
@@ -244,21 +388,21 @@ void LibertyParser::error()
#define CHECK_NV(result, check) \
do { \
- auto _R = (result); \
- if (!(_R check)) { \
- fprintf(stderr, "Error from '%s' (%ld %s) in %s:%d.\n", \
- #result, (long int)_R, #check, __FILE__, __LINE__); \
- abort(); \
- } \
+ auto _R = (result); \
+ if (!(_R check)) { \
+ fprintf(stderr, "Error from '%s' (%ld %s) in %s:%d.\n", \
+ #result, (long int)_R, #check, __FILE__, __LINE__); \
+ abort(); \
+ } \
} while(0)
#define CHECK_COND(result) \
do { \
- if (!(result)) { \
- fprintf(stderr, "Error from '%s' in %s:%d.\n", \
- #result, __FILE__, __LINE__); \
- abort(); \
- } \
+ if (!(result)) { \
+ fprintf(stderr, "Error from '%s' in %s:%d.\n", \
+ #result, __FILE__, __LINE__); \
+ abort(); \
+ } \
} while(0)
/**** END: http://svn.clifford.at/tools/trunk/examples/check.h ****/
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-15 16:53:58 +0000