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Merge remote-tracking branch 'origin/master' into xc7srl

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This commit is contained in:
Eddie Hung 2019-03-25 13:17:22 -07:00
commit 6b90d3cf6c
15 changed files with 943 additions and 37 deletions
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116
passes/techmap/libparse.cc
View file

@ -24,6 +24,7 @@
#include <istream>
#include <fstream>
#include <iostream>
#include <sstream>
#ifndef FILTERLIB
#include "kernel/log.h"
@ -86,15 +87,17 @@ int LibertyParser::lexer(std::string &str)
{
int c;
// eat whitespace
do {
c = f.get();
} while (c == ' ' || c == '\t' || c == '\r');
if (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || c == '_' || c == '-' || c == '+' || c == '.' || c == '[' || c == ']') {
// 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;
while (1) {
c = f.get();
if (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || c == '_' || c == '-' || c == '+' || c == '.' || c == '[' || c == ']')
if (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || c == '_' || c == '-' || c == '+' || c == '.')
str += c;
else
break;
@ -111,6 +114,8 @@ int LibertyParser::lexer(std::string &str)
}
}
// if it wasn't an identifer, number of array range,
// maybe it's a string?
if (c == '"') {
str = "";
while (1) {
@ -125,9 +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;
@ -136,7 +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++;
@ -144,9 +150,10 @@ 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();
if (c == '\r')
@ -157,11 +164,15 @@ int LibertyParser::lexer(std::string &str)
return '\\';
}
// check for a new line
if (c == '\n') {
line++;
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
@ -191,12 +202,11 @@ LibertyAst *LibertyParser::parse()
{
tok = lexer(str);
if (tok == ';')
// allow both ';' and new lines to
// terminate a statement.
if ((tok == ';') || (tok == 'n'))
break;
if (tok == 'n')
continue;
if (tok == ':' && ast->value.empty()) {
tok = lexer(ast->value);
if (tok != 'v')
@ -210,7 +220,12 @@ LibertyAst *LibertyParser::parse()
ast->value += str;
tok = lexer(str);
}
if (tok == ';')
// 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();
@ -225,6 +240,48 @@ LibertyAst *LibertyParser::parse()
continue;
if (tok == ')')
break;
// 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')
error();
ast->args.push_back(arg);
@ -255,6 +312,14 @@ void LibertyParser::error()
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()
@ -263,25 +328,34 @@ void LibertyParser::error()
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);
}
/**** BEGIN: http://svn.clifford.at/tools/trunk/examples/check.h ****/
#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 ****/

10
passes/techmap/libparse.h
View file

@ -46,9 +46,17 @@ namespace Yosys
LibertyAst *ast;
LibertyParser(std::istream &f) : f(f), line(1), ast(parse()) {}
~LibertyParser() { if (ast) delete ast; }
/* lexer return values:
'v': identifier, string, array range [...] -> str holds the token string
'n': newline
anything else is a single character.
*/
int lexer(std::string &str);
LibertyAst *parse();
LibertyAst *parse();
void error();
void error(const std::string &str);
};
}