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[ice40] Refactor Arch::getBudgetOverride()

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This commit is contained in:
Eddie Hung 2019-01-29 10:43:14 -08:00
parent f4d8a25fb7
commit 77bb5ea63a
1 changed files with 9 additions and 29 deletions
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38
ice40/arch.cc
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@ -594,26 +594,29 @@ std::vector<GroupId> Arch::getGroupGroups(GroupId group) const
bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t &budget) const bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t &budget) const
{ {
const auto &driver = net_info->driver; const auto &driver = net_info->driver;
if (driver.port == id_COUT && sink.port == id_CIN) { if (driver.port == id_COUT) {
if (driver.cell->constr_abs_z && driver.cell->constr_z < 7) NPNR_ASSERT(sink.port == id_CIN || sink.port == id_I3);
NPNR_ASSERT(driver.cell->constr_abs_z);
bool cin = sink.port == id_CIN;
bool same_y = driver.cell->constr_z < 7;
if (cin && same_y)
budget = 0; budget = 0;
else { else {
NPNR_ASSERT(driver.cell->constr_z == 7);
switch (args.type) { switch (args.type) {
#ifndef ICE40_HX1K_ONLY #ifndef ICE40_HX1K_ONLY
case ArchArgs::HX8K: case ArchArgs::HX8K:
#endif #endif
case ArchArgs::HX1K: case ArchArgs::HX1K:
budget = 190; budget = cin ? 190 : (same_y ? 260 : 560);
break; break;
#ifndef ICE40_HX1K_ONLY #ifndef ICE40_HX1K_ONLY
case ArchArgs::LP384: case ArchArgs::LP384:
case ArchArgs::LP1K: case ArchArgs::LP1K:
case ArchArgs::LP8K: case ArchArgs::LP8K:
budget = 290; budget = cin ? 290 : (same_y ? 380 : 670);
break; break;
case ArchArgs::UP5K: case ArchArgs::UP5K:
budget = 560; budget = cin ? 560 : (same_y ? 660 : 1220);
break; break;
#endif #endif
default: default:
@ -621,29 +624,6 @@ bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay
} }
} }
return true; return true;
} else if (driver.port == id_COUT && sink.port == id_I3) {
bool same_y = driver.cell->constr_abs_z && driver.cell->constr_z < 7;
switch (args.type) {
#ifndef ICE40_HX1K_ONLY
case ArchArgs::HX8K:
#endif
case ArchArgs::HX1K:
budget = same_y ? 260 : 560;
break;
#ifndef ICE40_HX1K_ONLY
case ArchArgs::LP384:
case ArchArgs::LP1K:
case ArchArgs::LP8K:
budget = same_y ? 380 : 670;
break;
case ArchArgs::UP5K:
budget = same_y ? 660 : 1220;
break;
#endif
default:
log_error("Unsupported iCE40 chip type.\n");
}
return true;
} }
return false; return false;
} }