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ecp5: Improve mixed no-FF/FF placement

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-09-30 18:39:49 +01:00
parent 3e399c9f20
commit 6a1b49c311
4 changed files with 45 additions and 30 deletions
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38
ecp5/arch_place.cc
View File

@ -39,25 +39,27 @@ bool Arch::slicesCompatible(const std::vector<const CellInfo *> &cells) const
IdString CLKMUX, LSRMUX, SRMODE;
bool first = true;
for (auto cell : cells) {
if (first) {
clk_sig = cell->sliceInfo.clk_sig;
lsr_sig = cell->sliceInfo.lsr_sig;
CLKMUX = cell->sliceInfo.clkmux;
LSRMUX = cell->sliceInfo.lsrmux;
SRMODE = cell->sliceInfo.srmode;
} else {
if (cell->sliceInfo.clk_sig != clk_sig)
return false;
if (cell->sliceInfo.lsr_sig != lsr_sig)
return false;
if (cell->sliceInfo.clkmux != CLKMUX)
return false;
if (cell->sliceInfo.lsrmux != LSRMUX)
return false;
if (cell->sliceInfo.srmode != SRMODE)
return false;
if (cell->sliceInfo.using_dff) {
if (first) {
clk_sig = cell->sliceInfo.clk_sig;
lsr_sig = cell->sliceInfo.lsr_sig;
CLKMUX = cell->sliceInfo.clkmux;
LSRMUX = cell->sliceInfo.lsrmux;
SRMODE = cell->sliceInfo.srmode;
} else {
if (cell->sliceInfo.clk_sig != clk_sig)
return false;
if (cell->sliceInfo.lsr_sig != lsr_sig)
return false;
if (cell->sliceInfo.clkmux != CLKMUX)
return false;
if (cell->sliceInfo.lsrmux != LSRMUX)
return false;
if (cell->sliceInfo.srmode != SRMODE)
return false;
}
first = false;
}
first = false;
}
return true;
}

1
ecp5/archdefs.h
View File

@ -143,6 +143,7 @@ struct ArchCellInfo
{
struct
{
bool using_dff;
IdString clk_sig, lsr_sig, clkmux, lsrmux, srmode;
} sliceInfo;
};

27
ecp5/bitstream.cc
View File

@ -244,17 +244,22 @@ void write_bitstream(Context *ctx, std::string base_config_file, std::string tex
cc.tiles[tname].add_enum(slice + ".REG1.REGSET",
str_or_default(ci->params, ctx->id("REG1_REGSET"), "RESET"));
cc.tiles[tname].add_enum(slice + ".CEMUX", str_or_default(ci->params, ctx->id("CEMUX"), "1"));
NetInfo *lsrnet = nullptr;
if (ci->ports.find(ctx->id("LSR")) != ci->ports.end() && ci->ports.at(ctx->id("LSR")).net != nullptr)
lsrnet = ci->ports.at(ctx->id("LSR")).net;
if (ctx->getBoundWireNet(ctx->getWireByName(
ctx->id(fmt_str("X" << bel.location.x << "/Y" << bel.location.y << "/LSR0")))) == lsrnet) {
cc.tiles[tname].add_enum("LSR0.SRMODE", str_or_default(ci->params, ctx->id("SRMODE"), "LSR_OVER_CE"));
cc.tiles[tname].add_enum("LSR0.LSRMUX", str_or_default(ci->params, ctx->id("LSRMUX"), "LSR"));
} else if (ctx->getBoundWireNet(ctx->getWireByName(ctx->id(
fmt_str("X" << bel.location.x << "/Y" << bel.location.y << "/LSR1")))) == lsrnet) {
cc.tiles[tname].add_enum("LSR1.SRMODE", str_or_default(ci->params, ctx->id("SRMODE"), "LSR_OVER_CE"));
cc.tiles[tname].add_enum("LSR1.LSRMUX", str_or_default(ci->params, ctx->id("LSRMUX"), "LSR"));
if (ci->sliceInfo.using_dff) {
NetInfo *lsrnet = nullptr;
if (ci->ports.find(ctx->id("LSR")) != ci->ports.end() && ci->ports.at(ctx->id("LSR")).net != nullptr)
lsrnet = ci->ports.at(ctx->id("LSR")).net;
if (ctx->getBoundWireNet(ctx->getWireByName(
ctx->id(fmt_str("X" << bel.location.x << "/Y" << bel.location.y << "/LSR0")))) == lsrnet) {
cc.tiles[tname].add_enum("LSR0.SRMODE",
str_or_default(ci->params, ctx->id("SRMODE"), "LSR_OVER_CE"));
cc.tiles[tname].add_enum("LSR0.LSRMUX", str_or_default(ci->params, ctx->id("LSRMUX"), "LSR"));
} else if (ctx->getBoundWireNet(ctx->getWireByName(ctx->id(
fmt_str("X" << bel.location.x << "/Y" << bel.location.y << "/LSR1")))) == lsrnet) {
cc.tiles[tname].add_enum("LSR1.SRMODE",
str_or_default(ci->params, ctx->id("SRMODE"), "LSR_OVER_CE"));
cc.tiles[tname].add_enum("LSR1.LSRMUX", str_or_default(ci->params, ctx->id("LSRMUX"), "LSR"));
}
}
if (str_or_default(ci->params, ctx->id("MODE"), "LOGIC") == "CCU2") {

9
ecp5/pack.cc
View File

@ -493,7 +493,7 @@ class Ecp5Packer
}
}
std::vector<std::vector<CellInfo*>> packed_chains;
std::vector<std::vector<CellInfo *>> packed_chains;
// Chain packing
for (auto &chain : all_chains) {
@ -797,6 +797,13 @@ void Arch::assignArchInfo()
for (auto cell : sorted(cells)) {
CellInfo *ci = cell.second;
if (ci->type == id_TRELLIS_SLICE) {
ci->sliceInfo.using_dff = false;
if (ci->ports.count(id_Q0) && ci->ports[id_Q0].net != nullptr)
ci->sliceInfo.using_dff = true;
if (ci->ports.count(id_Q1) && ci->ports[id_Q1].net != nullptr)
ci->sliceInfo.using_dff = true;
if (ci->ports.count(id_CLK) && ci->ports[id_CLK].net != nullptr)
ci->sliceInfo.clk_sig = ci->ports[id_CLK].net->name;
else