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opt_mem_feedback: Add wide port support.

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This commit is contained in:
Marcelina Kościelnicka 2021-05-25 01:52:52 +02:00
parent c1a4730739
commit 9d5d5a48b1
1 changed files with 24 additions and 14 deletions
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38
passes/opt/opt_mem_feedback.cc
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@ -144,11 +144,14 @@ struct OptMemFeedbackWorker
if (port.clk_enable) if (port.clk_enable)
continue; continue;
SigSpec addr = sigmap_xmux(port.addr); for (int sub = 0; sub < (1 << port.wide_log2); sub++) {
SigSpec addr = sigmap_xmux(port.addr);
async_rd_bits[addr].resize(mem.width); for (int i = 0; i < port.wide_log2; i++)
for (int i = 0; i < mem.width; i++) addr[i] = State(sub >> i & 1);
async_rd_bits[addr][i].insert(sigmap(port.data[i])); async_rd_bits[addr].resize(mem.width);
for (int i = 0; i < mem.width; i++)
async_rd_bits[addr][i].insert(sigmap(port.data[i + sub * mem.width]));
}
} }
if (async_rd_bits.empty()) if (async_rd_bits.empty())
@ -161,21 +164,28 @@ struct OptMemFeedbackWorker
{ {
auto &port = mem.wr_ports[i]; auto &port = mem.wr_ports[i];
SigSpec addr = sigmap_xmux(port.addr);
if (!async_rd_bits.count(addr))
continue;
log(" Analyzing %s.%s write port %d.\n", log_id(module), log_id(mem.memid), i); log(" Analyzing %s.%s write port %d.\n", log_id(module), log_id(mem.memid), i);
for (int j = 0; j < GetSize(port.data); j++) for (int sub = 0; sub < (1 << port.wide_log2); sub++)
{ {
if (port.en[j] == State::S0) SigSpec addr = sigmap_xmux(port.addr);
for (int k = 0; k < port.wide_log2; k++)
addr[k] = State(sub >> k & 1);
if (!async_rd_bits.count(addr))
continue; continue;
dict<RTLIL::SigBit, bool> state; for (int j = 0; j < mem.width; j++)
{
int bit_idx = sub * mem.width + j;
find_data_feedback(async_rd_bits.at(addr).at(j), sigmap(port.data[j]), state, i, j, paths); if (port.en[bit_idx] == State::S0)
continue;
dict<RTLIL::SigBit, bool> state;
find_data_feedback(async_rd_bits.at(addr).at(j), sigmap(port.data[bit_idx]), state, i, bit_idx, paths);
}
} }
} }