diff options
Diffstat (limited to 'kernel/mem.cc')
| -rw-r--r-- | kernel/mem.cc | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/mem.cc b/kernel/mem.cc index fe88be5d7..77165d97f 100644 --- a/kernel/mem.cc +++ b/kernel/mem.cc @@ -786,3 +786,23 @@ void Mem::emulate_priority(int idx1, int idx2) } port2.priority_mask[idx1] = false; } + +void Mem::prepare_wr_merge(int idx1, int idx2) { + log_assert(idx1 < idx2); + auto &port1 = wr_ports[idx1]; + auto &port2 = wr_ports[idx2]; + // If port 2 has priority over a port before port 1, make port 1 have priority too. + for (int i = 0; i < idx1; i++) + if (port2.priority_mask[i]) + port1.priority_mask[i] = true; + // If port 2 has priority over a port after port 1, emulate it. + for (int i = idx1 + 1; i < idx2; i++) + if (port2.priority_mask[i]) + emulate_priority(i, idx2); + // If some port had priority over port 2, make it have priority over the merged port too. + for (int i = idx2 + 1; i < GetSize(wr_ports); i++) { + auto &oport = wr_ports[i]; + if (oport.priority_mask[idx2]) + oport.priority_mask[idx1] = true; + } +} |