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Add support for ffM

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This commit is contained in:
Eddie Hung 2019-08-30 15:00:56 -07:00
parent 2983a35dc0
commit 390cf34d0a
2 changed files with 48 additions and 3 deletions
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12
passes/pmgen/xilinx_dsp.cc
View file

@ -39,6 +39,7 @@ void pack_xilinx_dsp(dict<SigBit, Cell*> &bit_to_driver, xilinx_dsp_pm &pm)
log("ffB: %s\n", log_id(st.ffB, "--"));
log("dsp: %s\n", log_id(st.dsp, "--"));
log("addAB: %s\n", log_id(st.addAB, "--"));
log("ffM: %s\n", log_id(st.ffM, "--"));
log("ffP: %s\n", log_id(st.ffP, "--"));
//log("muxP: %s\n", log_id(st.muxP, "--"));
log("sigPused: %s\n", log_signal(st.sigPused));
@ -95,6 +96,17 @@ void pack_xilinx_dsp(dict<SigBit, Cell*> &bit_to_driver, xilinx_dsp_pm &pm)
// cell->setPort("\\CEB2", st.ffB->getPort("\\EN"));
else log_abort();
}
if (st.ffM) {
SigSpec D = st.ffM->getPort("\\D");
SigSpec Q = st.ffM->getPort("\\Q");
P.replace(pm.sigmap(D), Q);
cell->setParam("\\MREG", State::S1);
if (st.ffP->type == "$dff")
cell->setPort("\\CEM", State::S1);
//else if (st.ffP->type == "$dffe")
// cell->setPort("\\CEP", st.ffP->getPort("\\EN"));
else log_abort();
}
if (st.ffP) {
SigSpec D;
//if (st.muxP)

39
passes/pmgen/xilinx_dsp.pmg
View file

@ -2,7 +2,7 @@ pattern xilinx_dsp
state <SigBit> clock
state <std::set<SigBit>> sigAset sigBset
state <SigSpec> sigC sigP sigPused
state <SigSpec> sigC sigM sigMused sigP sigPused
state <Cell*> addAB
match dsp
@ -18,6 +18,12 @@ code sigAset sigBset
sigBset = B.to_sigbit_set();
endcode
code sigM
sigM = port(dsp, \P);
//if (GetSize(sigH) <= 10)
// reject;
endcode
match ffA
if param(dsp, \AREG).as_int() == 0
if !sigAset.empty()
@ -63,8 +69,35 @@ code clock
}
endcode
code sigP
sigP = port(dsp, \P);
match ffM
if param(dsp, \MREG).as_int() == 0
select ffM->type.in($dff)
// DSP48E1 does not support clock inversion
select param(ffM, \CLK_POLARITY).as_bool()
select nusers(port(ffM, \D)) == 2
//index <SigSpec> port(ffM, \D) === sigM.extract(0, GetSize(port(ffM, \D))) // TODO: Why doesn't this work!?!
filter port(ffM, \D) == sigM.extract(0, GetSize(port(ffM, \D)))
filter nusers(sigM.extract_end(param(ffM, \WIDTH).as_int())) == 1
optional
endmatch
code clock sigM sigP
if (ffM) {
log_warning("M FOUND!\n");
sigM = port(ffM, \Q);
for (auto b : sigM)
if (b.wire->get_bool_attribute(\keep))
reject;
SigBit c = port(ffB, \CLK).as_bit();
if (clock != SigBit() && c != clock)
reject;
clock = c;
}
sigP = sigM;
endcode
match addA