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xilinx_srl to use 'slice' features of pmgen for word level

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This commit is contained in:
Eddie Hung 2019-08-23 12:22:06 -07:00
parent f4fd41d5d2
commit 18b64609c2
2 changed files with 49 additions and 32 deletions
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34
passes/pmgen/xilinx_srl.pmg
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@ -151,8 +151,9 @@ endcode
pattern variable
state <int> shiftx_width
state <int> slice
udata <int> minlen
udata <vector<Cell*>> chain
udata <vector<pair<Cell*,int>>> chain
match shiftx
select shiftx->type.in($shiftx)
@ -166,13 +167,16 @@ code shiftx_width
endcode
match first
select first->type.in($_DFF_N_, $_DFF_P_, $_DFFE_NN_, $_DFFE_NP_, $_DFFE_PN_, $_DFFE_PP_)
select nusers(port(first, \Q)) == 2
index <SigBit> port(first, \Q) === port(shiftx, \A)[shiftx_width-1]
select first->type.in($_DFF_N_, $_DFF_P_, $_DFFE_NN_, $_DFFE_NP_, $_DFFE_PN_, $_DFFE_PP_, $dff, $dffe)
select !first->has_keep_attr()
slice idx GetSize(port(first, \Q))
select nusers(port(first, \Q)[idx]) == 2
index <SigBit> port(first, \Q)[idx] === port(shiftx, \A)[shiftx_width-1]
set slice idx
endmatch
code
chain.push_back(first);
chain.emplace_back(first, slice);
subpattern(tail);
finally
if (GetSize(chain) == shiftx_width)
@ -185,26 +189,24 @@ endcode
subpattern tail
arg shiftx
arg shiftx_width
arg slice
match next
semioptional
select next->type.in($_DFF_N_, $_DFF_P_, $_DFFE_NN_, $_DFFE_NP_, $_DFFE_PN_, $_DFFE_PP_)
select next->type.in($_DFF_N_, $_DFF_P_, $_DFFE_NN_, $_DFFE_NP_, $_DFFE_PN_, $_DFFE_PP_, $dff, $dffe)
select !next->has_keep_attr()
select !port(next, \D)[0].wire->get_bool_attribute(\keep)
select nusers(port(next, \Q)) == 3
index <IdString> next->type === chain.back()->type
index <SigBit> port(next, \Q) === port(chain.back(), \D)
index <SigBit> port(next, \Q) === port(shiftx, \A)[shiftx_width-1-GetSize(chain)]
slice idx GetSize(port(next, \Q))
select nusers(port(next, \Q)[idx]) == 3
index <IdString> next->type === chain.back().first->type
index <SigBit> port(next, \Q)[idx] === port(chain.back().first, \D)[chain.back().second]
index <SigBit> port(next, \Q)[idx] === port(shiftx, \A)[shiftx_width-1-GetSize(chain)]
set slice idx
endmatch
code
if (next) {
auto sig = port(next, \Q);
log_warning("nusers of '%s'\n", log_signal(sig));
for (auto bit : sigmap(sig))
for (auto user : sigusers[bit])
log_warning("\t%s\n", log_id(user));
chain.push_back(next);
chain.emplace_back(next, slice);
if (GetSize(chain) < shiftx_width)
subpattern(tail);
}