diff options
| author | Clifford Wolf <clifford@clifford.at> | 2016-01-15 23:36:05 +0100 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2016-01-15 23:36:05 +0100 |
| commit | fdaac3542cf01ff757fd764871df0e81f4c62a3a (patch) | |
| tree | 823f7a993691bb566f87bc62d5ecf67c8be26532 /icetime/icetime.cc | |
| parent | 8467e955e59616969a05e87edef88bbf6cff7662 (diff) | |
| download | icestorm-fdaac3542cf01ff757fd764871df0e81f4c62a3a.tar.gz icestorm-fdaac3542cf01ff757fd764871df0e81f4c62a3a.tar.bz2 icestorm-fdaac3542cf01ff757fd764871df0e81f4c62a3a.zip | |
icetime progress
Diffstat (limited to 'icetime/icetime.cc')
| -rw-r--r-- | icetime/icetime.cc | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/icetime/icetime.cc b/icetime/icetime.cc index e014855..8daf89d 100644 --- a/icetime/icetime.cc +++ b/icetime/icetime.cc @@ -28,13 +28,12 @@ #include <map> #include <set> -#define MAX_SPAN_HACK 1 - // add this number of ns as estimation for clock distribution mismatch #define GLOBAL_CLK_DIST_JITTER 0.1 FILE *fin, *fout; bool verbose = false; +bool max_span_hack = false; std::string config_device, selected_package; std::vector<std::vector<std::string>> config_tile_type; @@ -1510,7 +1509,7 @@ struct make_interconn_worker_t cell_log[trg] = std::make_pair(*cursor, "IoSpan4Mux"); } else { tn = tname(); - netlist_cell_types[tn] = stringf("Span4Mux_%c%d", horiz ? 'h' : 'v', MAX_SPAN_HACK ? 4 : count_length); + netlist_cell_types[tn] = stringf("Span4Mux_%c%d", horiz ? 'h' : 'v', max_span_hack ? 4 : count_length); netlist_cell_ports[tn]["I"] = seg_name(*cursor); netlist_cell_ports[tn]["O"] = seg_name(trg); cell_log[trg] = std::make_pair(*cursor, stringf("Span4Mux_%c%d", horiz ? 'h' : 'v', count_length)); @@ -1538,7 +1537,7 @@ struct make_interconn_worker_t count_length = std::max(count_length, 0); tn = tname(); - netlist_cell_types[tn] = stringf("Span12Mux_%c%d", horiz ? 'h' : 'v', MAX_SPAN_HACK ? 12 : count_length); + netlist_cell_types[tn] = stringf("Span12Mux_%c%d", horiz ? 'h' : 'v', max_span_hack ? 12 : count_length); netlist_cell_ports[tn]["I"] = seg_name(*cursor); netlist_cell_ports[tn]["O"] = seg_name(trg); cell_log[trg] = std::make_pair(*cursor, stringf("Span12Mux_%c%d", horiz ? 'h' : 'v', count_length)); @@ -1727,6 +1726,9 @@ void help(const char *cmd) printf(" write a graphviz description of the interconnect tree\n"); printf(" that includes the given net to 'icetime_graph.dot'.\n"); printf("\n"); + printf(" -m\n"); + printf(" enable max_span_hack for conservative estimates\n"); + printf("\n"); printf(" -t\n"); printf(" print a timing estimate (based on topological timing\n"); printf(" analysis)\n"); @@ -1746,7 +1748,7 @@ int main(int argc, char **argv) std::vector<std::string> print_timing_nets; int opt; - while ((opt = getopt(argc, argv, "p:P:g:tT:v")) != -1) + while ((opt = getopt(argc, argv, "p:P:g:mtT:v")) != -1) { switch (opt) { @@ -1760,6 +1762,9 @@ int main(int argc, char **argv) case 'g': graph_nets.insert(atoi(optarg)); break; + case 'm': + max_span_hack = true; + break; case 't': print_timing = true; break; @@ -2006,6 +2011,8 @@ int main(int argc, char **argv) printf("==========================================\n"); printf("\n"); printf("Warning: This timing analysis report is an estimate!\n"); + if (max_span_hack) + printf("Info: max_span_hack is enabled: estimate is conservative.\n"); printf("\n"); TimingAnalysis ta; |