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ecp5: Add ccu2c_to_slice

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-09-30 17:05:42 +01:00
parent 2628344298
commit e81a95cf7e
3 changed files with 41 additions and 12 deletions
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27
ecp5/cells.cc
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@ -211,4 +211,31 @@ void lut_to_slice(Context *ctx, CellInfo *lut, CellInfo *lc, int index)
replace_port(lut, ctx->id("Z"), lc, ctx->id("F" + std::to_string(index)));
}
void ccu2c_to_slice(Context *ctx, CellInfo *ccu, CellInfo *lc)
{
lc->params[ctx->id("MODE")] = "CCU2C";
lc->params[ctx->id("LUT0_INITVAL")] = str_or_default(ccu->params, ctx->id("INIT0"), "0");
lc->params[ctx->id("LUT1_INITVAL")] = str_or_default(ccu->params, ctx->id("INIT1"), "0");
lc->params[ctx->id("INJECT1_0")] = str_or_default(ccu->params, ctx->id("INJECT1_0"), "YES");
lc->params[ctx->id("INJECT1_1")] = str_or_default(ccu->params, ctx->id("INJECT1_1"), "YES");
replace_port(ccu, ctx->id("CIN"), lc, ctx->id("FCI"));
replace_port(ccu, ctx->id("A0"), lc, ctx->id("A0"));
replace_port(ccu, ctx->id("B0"), lc, ctx->id("B0"));
replace_port(ccu, ctx->id("C0"), lc, ctx->id("C0"));
replace_port(ccu, ctx->id("D0"), lc, ctx->id("D0"));
replace_port(ccu, ctx->id("A1"), lc, ctx->id("A1"));
replace_port(ccu, ctx->id("B1"), lc, ctx->id("B1"));
replace_port(ccu, ctx->id("C1"), lc, ctx->id("C1"));
replace_port(ccu, ctx->id("D1"), lc, ctx->id("D1"));
replace_port(ccu, ctx->id("S0"), lc, ctx->id("F0"));
replace_port(ccu, ctx->id("S1"), lc, ctx->id("F1"));
replace_port(ccu, ctx->id("COUT"), lc, ctx->id("FCO"));
}
NEXTPNR_NAMESPACE_END

1
ecp5/cells.h
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@ -48,6 +48,7 @@ inline bool is_l6mux(const BaseCtx *ctx, const CellInfo *cell) { return cell->ty
void ff_to_slice(Context *ctx, CellInfo *ff, CellInfo *lc, int index, bool driven_by_lut);
void lut_to_slice(Context *ctx, CellInfo *lut, CellInfo *lc, int index);
void ccu2c_to_slice(Context *ctx, CellInfo *ccu, CellInfo *lc);
NEXTPNR_NAMESPACE_END

25
ecp5/pack.cc
View File

@ -108,7 +108,8 @@ class Ecp5Packer
}
// Return whether or not an FF can be added to a tile (pairing checks must also be done using the fn above)
bool can_add_ff_to_file(const std::vector<CellInfo *> &tile_ffs, CellInfo *ff0) {
bool can_add_ff_to_file(const std::vector<CellInfo *> &tile_ffs, CellInfo *ff0)
{
for (const auto &existing : tile_ffs) {
if (net_or_nullptr(existing, ctx->id("CLK")) != net_or_nullptr(ff0, ctx->id("CLK")))
return false;
@ -459,19 +460,19 @@ class Ecp5Packer
return chains;
}
// Pack carries and set up appropriate relative constraints
void pack_carries() {
void pack_carries()
{
log_info("Packing carries...\n");
auto chains = find_chains(ctx, [](const Context *ctx, const CellInfo *cell) {
return is_carry(ctx, cell);
}, [](const Context *ctx, const CellInfo *cell) {
return net_driven_by(ctx, cell->ports.at(ctx->id("CIN")).net, is_carry, ctx->id("COUT"));
}, [](const Context *ctx, const CellInfo *cell) {
return net_only_drives(ctx, cell->ports.at(ctx->id("COUT")).net, is_carry,
ctx->id("CIN"), false);
}, 1);
auto chains = find_chains(
ctx, [](const Context *ctx, const CellInfo *cell) { return is_carry(ctx, cell); },
[](const Context *ctx, const CellInfo *cell) {
return net_driven_by(ctx, cell->ports.at(ctx->id("CIN")).net, is_carry, ctx->id("COUT"));
},
[](const Context *ctx, const CellInfo *cell) {
return net_only_drives(ctx, cell->ports.at(ctx->id("COUT")).net, is_carry, ctx->id("CIN"), false);
},
1);
}
// Pack LUTs that have been paired together