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Added help messages to ilang and verilog frontends

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This commit is contained in:
Clifford Wolf 2013-03-01 08:03:00 +01:00
parent 51c2b797b3
commit 8a6b0a3520
3 changed files with 60 additions and 2 deletions
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47
frontends/verilog/verilog_frontend.cc
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@ -39,7 +39,52 @@ using namespace VERILOG_FRONTEND;
// use the Verilog bison/flex parser to generate an AST and use AST::process() to convert it to RTLIL
struct VerilogFrontend : public Frontend {
VerilogFrontend() : Frontend("verilog") { }
VerilogFrontend() : Frontend("verilog", "read modules from verilog file") { }
virtual void help()
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" read_verilog [filename]\n");
log("\n");
log("Load modules from a verilog file to the current design. A large subset of\n");
log("Verilog-2005 is supported.\n");
log("\n");
log(" -dump_ast\n");
log(" dump abstract syntax tree (after simplification)\n");
log("\n");
log(" -dump_ast_diff\n");
log(" dump ast differences before and after simplification\n");
log("\n");
log(" -dump_vlog\n");
log(" dump ast as verilog code (after simplification)\n");
log("\n");
log(" -yydebug\n");
log(" enable parser debug output\n");
log("\n");
log(" -nolatches\n");
log(" usually latches are synthesized into logic loops\n");
log(" this option prohibits this and sets the output to 'x'\n");
log(" in what would be the latches hold condition\n");
log("\n");
log(" this behavior can also be achieved by setting the\n");
log(" 'nolatches' attribute on the respective module or\n");
log(" always block.\n");
log("\n");
log(" -nomem2reg\n");
log(" under certain conditions memories are converted to registers\n");
log(" early during simplification to ensure correct handling of\n");
log(" complex corner cases. this option disables this behavior.\n");
log("\n");
log(" this can also be achieved by setting the 'nomem2reg'\n");
log(" attribute on the respective module or register.\n");
log("\n");
log(" -ppdump\n");
log(" dump verilog code after pre-processor\n");
log("\n");
log(" -nopp\n");
log(" do not run the pre-processor\n");
log("\n");
}
virtual void execute(FILE *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design)
{
bool flag_dump_ast = false;