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kernel/mem: Add prepare_wr_merge helper.

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This commit is contained in:
Marcelina Kościelnicka 2021-05-26 02:06:44 +02:00
parent 64ba3c3842
commit 57ca51be76
2 changed files with 27 additions and 0 deletions
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20
kernel/mem.cc
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@ -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;
}
}