caiyu/nextpnr
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

getBudgetOverride() now handles COUT crossing tiles

Browse Source
This commit is contained in:
Eddie Hung 2018-07-26 22:30:15 -07:00
parent 97e546041e
commit cd561b4316
2 changed files with 12 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
ice40/arch.cc
View File

@ -587,11 +587,18 @@ delay_t Arch::estimateDelay(WireId src, WireId dst) const
return xscale * abs(xd) + yscale * abs(yd) + offset; return xscale * abs(xd) + yscale * abs(yd) + offset;
} }
delay_t Arch::getBudgetOverride(const PortRef &pr, delay_t v) const delay_t Arch::getBudgetOverride(NetInfo *net_info, int user_idx, delay_t budget) const
{ {
if (pr.port == id("COUT")) const auto& driver = net_info->driver;
return 0; if (driver.port == id_cout) {
return v; const auto& sink = net_info->users[user_idx];
auto driver_loc = getBelLocation(driver.cell->bel);
auto sink_loc = getBelLocation(sink.cell->bel);
if (driver_loc.y == sink_loc.y)
return 0;
return 250;
}
return budget;
} }
// ----------------------------------------------------------------------- // -----------------------------------------------------------------------

2
ice40/arch.h
View File

@ -688,7 +688,7 @@ struct Arch : BaseCtx
delay_t getRipupDelayPenalty() const { return 200; } delay_t getRipupDelayPenalty() const { return 200; }
float getDelayNS(delay_t v) const { return v * 0.001; } float getDelayNS(delay_t v) const { return v * 0.001; }
uint32_t getDelayChecksum(delay_t v) const { return v; } uint32_t getDelayChecksum(delay_t v) const { return v; }
delay_t getBudgetOverride(const PortRef &pr, delay_t v) const; delay_t getBudgetOverride(NetInfo *net_info, int user_idx, delay_t budget) const;
// ------------------------------------------------- // -------------------------------------------------