From 0daffec2a0efdbea36201eeb5666d208a10d0226 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Mon, 30 Jul 2018 15:35:40 +0200 Subject: Add predictDelay Arch API Signed-off-by: Clifford Wolf --- common/nextpnr.cc | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'common') diff --git a/common/nextpnr.cc b/common/nextpnr.cc index cf1b5982..5b0a45ed 100644 --- a/common/nextpnr.cc +++ b/common/nextpnr.cc @@ -93,7 +93,9 @@ delay_t Context::getNetinfoRouteDelay(NetInfo *net_info, int user_idx) const WireId src_wire = getNetinfoSourceWire(net_info); if (src_wire == WireId()) return 0; - WireId cursor = getNetinfoSinkWire(net_info, user_idx); + + WireId dst_wire = getNetinfoSinkWire(net_info, user_idx); + WireId cursor = dst_wire; delay_t delay = 0; while (cursor != WireId() && cursor != src_wire) { @@ -107,11 +109,9 @@ delay_t Context::getNetinfoRouteDelay(NetInfo *net_info, int user_idx) const } if (cursor == src_wire) - delay += getWireDelay(src_wire).maxDelay(); - else - delay += estimateDelay(src_wire, cursor); + return delay + getWireDelay(src_wire).maxDelay(); - return delay; + return predictDelay(src_wire, dst_wire); } static uint32_t xorshift32(uint32_t x) -- cgit v1.2.3 From e4b044da52ce7d8fed2e461bec09c86cb293566d Mon Sep 17 00:00:00 2001 From: Eddie Hung Date: Mon, 30 Jul 2018 19:39:44 -0700 Subject: Fix tns --- common/place_common.cc | 1 + 1 file changed, 1 insertion(+) (limited to 'common') diff --git a/common/place_common.cc b/common/place_common.cc index 5673c847..b7ea84f8 100644 --- a/common/place_common.cc +++ b/common/place_common.cc @@ -72,6 +72,7 @@ wirelen_t get_net_metric(const Context *ctx, const NetInfo *net, MetricType type wirelength = wirelen_t((ymax - ymin) + (xmax - xmin)); } + tns = ctx->getDelayNS(tns); return wirelength; } -- cgit v1.2.3 From a82f6f410595de26e82eaf4818e41036f0bc2f9c Mon Sep 17 00:00:00 2001 From: Eddie Hung Date: Mon, 30 Jul 2018 19:19:30 -0700 Subject: Modify predictDelay signature --- common/nextpnr.cc | 2 +- common/place_common.cc | 8 +++----- 2 files changed, 4 insertions(+), 6 deletions(-) (limited to 'common') diff --git a/common/nextpnr.cc b/common/nextpnr.cc index 5b0a45ed..4a97bd93 100644 --- a/common/nextpnr.cc +++ b/common/nextpnr.cc @@ -111,7 +111,7 @@ delay_t Context::getNetinfoRouteDelay(NetInfo *net_info, int user_idx) const if (cursor == src_wire) return delay + getWireDelay(src_wire).maxDelay(); - return predictDelay(src_wire, dst_wire); + return predictDelay(net_info, net_info->users[user_idx]); } static uint32_t xorshift32(uint32_t x) diff --git a/common/place_common.cc b/common/place_common.cc index b7ea84f8..3c19a733 100644 --- a/common/place_common.cc +++ b/common/place_common.cc @@ -37,10 +37,9 @@ wirelen_t get_net_metric(const Context *ctx, const NetInfo *net, MetricType type return 0; driver_gb = ctx->getBelGlobalBuf(driver_cell->bel); driver_loc = ctx->getBelLocation(driver_cell->bel); - WireId drv_wire = ctx->getBelPinWire(driver_cell->bel, ctx->portPinFromId(net->driver.port)); if (driver_gb) return 0; - float worst_slack = 1000; + delay_t worst_slack = std::numeric_limits::max(); int xmin = driver_loc.x, xmax = driver_loc.x, ymin = driver_loc.y, ymax = driver_loc.y; for (auto load : net->users) { if (load.cell == nullptr) @@ -49,9 +48,8 @@ wirelen_t get_net_metric(const Context *ctx, const NetInfo *net, MetricType type if (load_cell->bel == BelId()) continue; if (ctx->timing_driven && type == MetricType::COST) { - WireId user_wire = ctx->getBelPinWire(load_cell->bel, ctx->portPinFromId(load.port)); - delay_t raw_wl = ctx->estimateDelay(drv_wire, user_wire); - float slack = ctx->getDelayNS(load.budget) - ctx->getDelayNS(raw_wl); + delay_t net_delay = ctx->predictDelay(net, load); + auto slack = load.budget - net_delay; if (slack < 0) tns += slack; worst_slack = std::min(slack, worst_slack); -- cgit v1.2.3