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ecp5: Add logic utilisation before packing statistics

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-11-18 16:54:42 +00:00
parent 0a8e9b0fbd
commit 9a848d9d76
1 changed files with 45 additions and 0 deletions
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45
ecp5/pack.cc
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@ -56,6 +56,50 @@ class Ecp5Packer
new_cells.clear(); new_cells.clear();
} }
// Print logic usgage
void print_logic_usage()
{
int total_luts = 0, total_ffs = 0;
int total_ramluts = 0, total_ramwluts = 0;
for (auto bel : ctx->getBels()) {
if (ctx->getBelType(bel) == id_TRELLIS_SLICE) {
total_luts += 2;
total_ffs += 2;
Loc l = ctx->getBelLocation(bel);
if (l.z == 0 || l.z == 1)
total_ramluts += 2;
if (l.z == 2)
total_ramwluts += 2;
}
}
int used_lgluts = 0, used_cyluts = 0, used_ramluts = 0, used_ramwluts = 0, used_ffs = 0;
for (auto &cell : ctx->cells) {
CellInfo *ci = cell.second.get();
if (is_lut(ctx, ci))
++used_lgluts;
if (is_carry(ctx, ci))
used_cyluts += 2;
if (is_dpram(ctx, ci)) {
used_ramluts += 4;
used_ramwluts += 2;
}
if (is_ff(ctx, ci))
used_ffs += 2;
}
log_info("Logic utilisation before packing:\n");
auto pc = [](int used, int total) { return 100 * used / total; };
int used_luts = used_lgluts + used_cyluts + used_ramluts + used_ramwluts;
log_info(" Total LUT4s: %5d/%5d %5d%%\n", used_luts, total_luts, pc(used_luts, total_luts));
log_info(" logic LUTs: %5d/%5d %5d%%\n", used_lgluts, total_luts, pc(used_lgluts, total_luts));
log_info(" carry LUTs: %5d/%5d %5d%%\n", used_cyluts, total_luts, pc(used_cyluts, total_luts));
log_info(" RAM LUTs: %5d/%5d %5d%%\n", used_ramluts, total_ramluts, pc(used_ramluts, total_ramluts));
log_info(" RAMW LUTs: %5d/%5d %5d%%\n", used_ramwluts, total_ramwluts,
pc(used_ramwluts, total_ramwluts));
log_break();
log_info(" Total DFFs: %5d/%5d %5d%%\n", used_ffs, total_ffs, pc(used_ffs, total_ffs));
log_break();
}
// Find FFs associated with LUTs, or LUT expansion muxes // Find FFs associated with LUTs, or LUT expansion muxes
void find_lutff_pairs() void find_lutff_pairs()
{ {
@ -2682,6 +2726,7 @@ class Ecp5Packer
void pack() void pack()
{ {
prepack_checks(); prepack_checks();
print_logic_usage();
pack_io(); pack_io();
pack_dqsbuf(); pack_dqsbuf();
preplace_plls(); preplace_plls();