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Merge pull request #596 from litghost/extend_blif_parser 

#565 Add BLIF parsing support for .conn and .cname
This commit is contained in:
Clifford Wolf 2018-08-08 19:39:23 +02:00 committed by GitHub
parent 7b48da0bfc 219f1e9fc9
commit b210e9d293
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 35 additions and 5 deletions
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40
frontends/blif/blifparse.cc
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@ -83,7 +83,9 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
RTLIL::Module *module = nullptr;
RTLIL::Const *lutptr = NULL;
RTLIL::Cell *sopcell = NULL;
RTLIL::Cell *lastcell = nullptr;
RTLIL::State lut_default_state = RTLIL::State::Sx;
char err_reason[80];
int blif_maxnum = 0, sopmode = -1;
auto blif_wire = [&](const std::string &wire_name) -> Wire*
@ -159,6 +161,7 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
if (module != nullptr)
goto error;
module = new RTLIL::Module;
lastcell = nullptr;
module->name = RTLIL::escape_id(strtok(NULL, " \t\r\n"));
obj_attributes = &module->attributes;
obj_parameters = nullptr;
@ -232,6 +235,7 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
}
module = nullptr;
lastcell = nullptr;
obj_attributes = nullptr;
obj_parameters = nullptr;
continue;
@ -264,6 +268,22 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
continue;
}
if (!strcmp(cmd, ".cname"))
{
char *p = strtok(NULL, " \t\r\n");
if (p == NULL)
goto error;
if(lastcell == nullptr || module == nullptr)
{
snprintf(err_reason, sizeof(err_reason), "No primative object to attach .cname %s.", p);
goto error_with_reason;
}
module->rename(lastcell, p);
continue;
}
if (!strcmp(cmd, ".attr") || !strcmp(cmd, ".param")) {
char *n = strtok(NULL, " \t\r\n");
char *v = strtok(NULL, "\r\n");
@ -281,12 +301,16 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
const_v.bits[i] = v[n-i-1] != '0' ? State::S1 : State::S0;
}
if (!strcmp(cmd, ".attr")) {
if (obj_attributes == nullptr)
goto error;
if (obj_attributes == nullptr) {
snprintf(err_reason, sizeof(err_reason), "No object to attach .attr too.");
goto error_with_reason;
}
(*obj_attributes)[id_n] = const_v;
} else {
if (obj_parameters == nullptr)
goto error;
if (obj_parameters == nullptr) {
snprintf(err_reason, sizeof(err_reason), "No object to attach .param too.");
goto error_with_reason;
}
(*obj_parameters)[id_n] = const_v;
}
continue;
@ -331,6 +355,7 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
}
}
lastcell = cell;
obj_attributes = &cell->attributes;
obj_parameters = &cell->parameters;
continue;
@ -383,6 +408,7 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
cell->setPort(it.first, sig);
}
lastcell = cell;
obj_attributes = &cell->attributes;
obj_parameters = &cell->parameters;
continue;
@ -391,7 +417,7 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
obj_attributes = nullptr;
obj_parameters = nullptr;
if (!strcmp(cmd, ".barbuf"))
if (!strcmp(cmd, ".barbuf") || !strcmp(cmd, ".conn"))
{
char *p = strtok(NULL, " \t\r\n");
if (p == NULL)
@ -459,6 +485,7 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
sopcell->setPort("\\A", input_sig);
sopcell->setPort("\\Y", output_sig);
sopmode = -1;
lastcell = sopcell;
}
else
{
@ -469,6 +496,7 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
cell->setPort("\\Y", output_sig);
lutptr = &cell->parameters.at("\\LUT");
lut_default_state = RTLIL::State::Sx;
lastcell = cell;
}
continue;
}
@ -546,6 +574,8 @@ void parse_blif(RTLIL::Design *design, std::istream &f, std::string dff_name, bo
error:
log_error("Syntax error in line %d!\n", line_count);
error_with_reason:
log_error("Syntax error in line %d: %s\n", line_count, err_reason);
}
struct BlifFrontend : public Frontend {