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CDC: --cdc now implies early exit, to allow eventual set_logic_0/1 on sigs

This commit is contained in:
Wilson Snyder 2010-01-16 20:14:52 -05:00
parent d651063749
commit d46074e0ad
3 changed files with 17 additions and 8 deletions
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6
bin/verilator
View File

@ -314,9 +314,9 @@ Specifies C++ without SystemC output mode; see also --sc and --sp.
=item --cdc
Experimental. Perform some clock domain crossing checks and issue related
warnings. Additional warning information is written to the file
{prefix}__cdc.txt. Generally used with --lint-only. Enables CDCRSTLOGIC
warning.
warnings (CDCRSTLOGIC) and then exit; if warnings other than CDC warnings
are needed make a second run with --lint-only. Additional warning
information is also written to the file {prefix}__cdc.txt.
Currently only checks some items that other CDC tools missed; if you have
interest in adding more traditional CDC checks, please contact the authors.

17
src/Verilator.cpp
View File

@ -356,6 +356,8 @@ void process () {
// Clock domain crossing analysis
if (v3Global.opt.cdc()) {
V3Cdc::cdcAll(v3Global.rootp());
V3Error::abortIfErrors();
return;
}
// Reorder assignments in pipelined blocks
@ -527,6 +529,8 @@ void process () {
// Makefile must be after all other emitters
V3EmitMk::emitmk(v3Global.rootp());
}
// Note early return above when opt.cdc()
}
//######################################################################
@ -550,8 +554,11 @@ int main(int argc, char** argv, char** env) {
if (v3Global.opt.coverage() && !v3Global.opt.systemPerl() && !v3Global.opt.lintOnly()) {
v3fatal("Unsupported: Coverage analysis requires --sp output.");
}
if (!v3Global.opt.outFormatOk() && !v3Global.opt.preprocOnly() && !v3Global.opt.lintOnly()) {
v3fatal("verilator: Need --cc, --sc, --sp, --lint-only or --E option");
if (!v3Global.opt.outFormatOk()
&& !v3Global.opt.preprocOnly()
&& !v3Global.opt.lintOnly()
&& !v3Global.opt.cdc()) {
v3fatal("verilator: Need --cc, --sc, --sp, --cdc, --lint-only or --E option");
}
// Check environment
V3Options::getenvSYSTEMC();
@ -566,6 +573,7 @@ int main(int argc, char** argv, char** env) {
if (v3Global.opt.skipIdentical()
&& !v3Global.opt.preprocOnly()
&& !v3Global.opt.lintOnly()
&& !v3Global.opt.cdc()
&& V3File::checkTimes(v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"__verFiles.dat", argString)) {
UINFO(1,"--skip-identical: No change to any source files, exiting\n");
exit(0);
@ -593,10 +601,11 @@ int main(int argc, char** argv, char** env) {
v3Global.rootp()->dumpTreeFile(v3Global.debugFilename("final.tree",99));
V3Error::abortIfWarnings();
if (!v3Global.opt.lintOnly() && v3Global.opt.makeDepend()) {
if (!v3Global.opt.lintOnly() && !v3Global.opt.cdc()
&& v3Global.opt.makeDepend()) {
V3File::writeDepend(v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"__ver.d");
}
if (!v3Global.opt.lintOnly()
if (!v3Global.opt.lintOnly() && !v3Global.opt.cdc()
&& (v3Global.opt.skipIdentical() || v3Global.opt.makeDepend())) {
V3File::writeTimes(v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"__verFiles.dat", argString);
}

2
test_regress/t/t_cdc_async_bad.pl
View File

@ -8,7 +8,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
# Version 2.0.
compile (
v_flags => ['--cdc --lint-only'],
v_flags => ['--cdc'],
verilator_make_gcc => 0,
fails => 1,
expect=>