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

Add Router1Cfg

Browse Source 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2018-08-02 13:58:23 +02:00
parent 94abe914fc
commit 6ccf8629b5
5 changed files with 50 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
common/router1.cc
View File

@ -105,6 +105,7 @@ void ripup_net(Context *ctx, IdString net_name)
struct Router
{
Context *ctx;
const Router1Cfg &cfg;
RipupScoreboard scores;
IdString net_name;
@ -226,9 +227,9 @@ struct Router
visitCnt += thisVisitCnt;
}
Router(Context *ctx, RipupScoreboard &scores, WireId src_wire, WireId dst_wire, bool ripup = false,
delay_t ripup_penalty = 0)
: ctx(ctx), scores(scores), ripup(ripup), ripup_penalty(ripup_penalty)
Router(Context *ctx, const Router1Cfg &cfg, RipupScoreboard &scores, WireId src_wire, WireId dst_wire,
bool ripup = false, delay_t ripup_penalty = 0)
: ctx(ctx), cfg(cfg), scores(scores), ripup(ripup), ripup_penalty(ripup_penalty)
{
std::unordered_map<WireId, delay_t> src_wires;
src_wires[src_wire] = ctx->getWireDelay(src_wire).maxDelay();
@ -251,9 +252,9 @@ struct Router
}
}
Router(Context *ctx, RipupScoreboard &scores, IdString net_name, int user_idx = -1, bool reroute = false,
bool ripup = false, delay_t ripup_penalty = 0)
: ctx(ctx), scores(scores), net_name(net_name), ripup(ripup), ripup_penalty(ripup_penalty)
Router(Context *ctx, const Router1Cfg &cfg, RipupScoreboard &scores, IdString net_name, int user_idx = -1,
bool reroute = false, bool ripup = false, delay_t ripup_penalty = 0)
: ctx(ctx), cfg(cfg), scores(scores), net_name(net_name), ripup(ripup), ripup_penalty(ripup_penalty)
{
auto net_info = ctx->nets.at(net_name).get();
@ -455,7 +456,8 @@ struct RouteJob
};
};
void addFullNetRouteJob(Context *ctx, IdString net_name, std::unordered_map<IdString, std::vector<bool>> &cache,
void addFullNetRouteJob(Context *ctx, const Router1Cfg &cfg,
IdString net_name, std::unordered_map<IdString, std::vector<bool>> &cache,
std::priority_queue<RouteJob, std::vector<RouteJob>, RouteJob::Greater> &queue)
{
NetInfo *net_info = ctx->nets.at(net_name).get();
@ -520,7 +522,8 @@ void addFullNetRouteJob(Context *ctx, IdString net_name, std::unordered_map<IdSt
net_cache[user_idx] = true;
}
void addNetRouteJobs(Context *ctx, IdString net_name, std::unordered_map<IdString, std::vector<bool>> &cache,
void addNetRouteJobs(Context *ctx, const Router1Cfg &cfg,
IdString net_name, std::unordered_map<IdString, std::vector<bool>> &cache,
std::priority_queue<RouteJob, std::vector<RouteJob>, RouteJob::Greater> &queue)
{
NetInfo *net_info = ctx->nets.at(net_name).get();
@ -568,7 +571,8 @@ void addNetRouteJobs(Context *ctx, IdString net_name, std::unordered_map<IdStrin
}
}
void cleanupReroute(Context *ctx, RipupScoreboard &scores, std::unordered_set<IdString> &cleanupQueue,
void cleanupReroute(Context *ctx, const Router1Cfg &cfg,
RipupScoreboard &scores, std::unordered_set<IdString> &cleanupQueue,
std::priority_queue<RouteJob, std::vector<RouteJob>, RouteJob::Greater> &jobQueue,
int &totalVisitCnt, int &totalRevisitCnt, int &totalOvertimeRevisitCnt)
{
@ -635,7 +639,7 @@ void cleanupReroute(Context *ctx, RipupScoreboard &scores, std::unordered_set<Id
ctx->unbindWire(dst_wire);
Router router(ctx, scores, net_name, user_idx, false, false);
Router router(ctx, cfg, scores, net_name, user_idx, false, false);
if (!router.routedOkay)
log_error("Failed to re-route arc %d of net %s.\n", user_idx, net_name.c_str(ctx));
@ -669,7 +673,7 @@ void cleanupReroute(Context *ctx, RipupScoreboard &scores, std::unordered_set<Id
NEXTPNR_NAMESPACE_BEGIN
bool router1(Context *ctx)
bool router1(Context *ctx, const Router1Cfg &cfg)
{
try {
int totalVisitCnt = 0, totalRevisitCnt = 0, totalOvertimeRevisitCnt = 0;
@ -685,7 +689,7 @@ bool router1(Context *ctx)
std::priority_queue<RouteJob, std::vector<RouteJob>, RouteJob::Greater> jobQueue;
for (auto &net_it : ctx->nets)
addNetRouteJobs(ctx, net_it.first, jobCache, jobQueue);
addNetRouteJobs(ctx, cfg, net_it.first, jobCache, jobQueue);
if (jobQueue.empty()) {
log_info("found no unrouted source-sink pairs. no routing necessary.\n");
@ -698,7 +702,7 @@ bool router1(Context *ctx)
int iterCnt = 0;
while (!jobQueue.empty()) {
if (iterCnt == 200) {
if (iterCnt == cfg.maxIterCnt) {
log_warning("giving up after %d iterations.\n", iterCnt);
log_info("Checksum: 0x%08x\n", ctx->checksum());
#ifndef NDEBUG
@ -731,6 +735,9 @@ bool router1(Context *ctx)
auto user_idx = jobQueue.top().user_idx;
jobQueue.pop();
if (cfg.fullCleanupReroute)
cleanupQueue.insert(net_name);
if (printNets) {
if (user_idx < 0)
log_info(" routing all %d users of net %s\n", int(ctx->nets.at(net_name)->users.size()),
@ -739,7 +746,7 @@ bool router1(Context *ctx)
log_info(" routing user %d of net %s\n", user_idx, net_name.c_str(ctx));
}
Router router(ctx, scores, net_name, user_idx, false, false);
Router router(ctx, cfg, scores, net_name, user_idx, false, false);
jobCnt++;
visitCnt += router.visitCnt;
@ -790,13 +797,14 @@ bool router1(Context *ctx)
ctx->sorted_shuffle(ripupArray);
for (auto net_name : ripupArray) {
if (cfg.cleanupReroute)
cleanupQueue.insert(net_name);
if (printNets)
log_info(" routing net %s. (%d users)\n", net_name.c_str(ctx),
int(ctx->nets.at(net_name)->users.size()));
Router router(ctx, scores, net_name, -1, false, true, ripup_penalty);
Router router(ctx, cfg, scores, net_name, -1, false, true, ripup_penalty);
netCnt++;
visitCnt += router.visitCnt;
@ -807,7 +815,8 @@ bool router1(Context *ctx)
log_error("Net %s is impossible to route.\n", net_name.c_str(ctx));
for (auto it : router.rippedNets) {
addFullNetRouteJob(ctx, it, jobCache, jobQueue);
addFullNetRouteJob(ctx, cfg, it, jobCache, jobQueue);
if (cfg.cleanupReroute)
cleanupQueue.insert(it);
}
@ -852,8 +861,8 @@ bool router1(Context *ctx)
if (iterCnt == 8 || iterCnt == 16 || iterCnt == 32 || iterCnt == 64 || iterCnt == 128)
ripup_penalty += ctx->getRipupDelayPenalty();
if (jobQueue.empty() || (iterCnt % 5) == 4)
cleanupReroute(ctx, scores, cleanupQueue, jobQueue, totalVisitCnt, totalRevisitCnt, totalOvertimeRevisitCnt);
if (jobQueue.empty() || (iterCnt % 5) == 4 || (cfg.fullCleanupReroute && iterCnt == 1))
cleanupReroute(ctx, cfg, scores, cleanupQueue, jobQueue, totalVisitCnt, totalRevisitCnt, totalOvertimeRevisitCnt);
ctx->yield();
}
@ -901,7 +910,7 @@ bool router1(Context *ctx)
jobCache.clear();
for (auto &net_it : ctx->nets)
addNetRouteJobs(ctx, net_it.first, jobCache, jobQueue);
addNetRouteJobs(ctx, cfg, net_it.first, jobCache, jobQueue);
#ifndef NDEBUG
if (!jobQueue.empty()) {
@ -936,7 +945,7 @@ bool router1(Context *ctx)
bool Context::getActualRouteDelay(WireId src_wire, WireId dst_wire, delay_t &delay)
{
RipupScoreboard scores;
Router router(this, scores, src_wire, dst_wire);
Router router(this, Router1Cfg(), scores, src_wire, dst_wire);
if (router.routedOkay)
delay = router.visited.at(dst_wire).delay;
return router.routedOkay;

9
common/router1.h
View File

@ -24,7 +24,14 @@
NEXTPNR_NAMESPACE_BEGIN
extern bool router1(Context *ctx);
struct Router1Cfg
{
int maxIterCnt = 200;
bool cleanupReroute = true;
bool fullCleanupReroute = true;
};
extern bool router1(Context *ctx, const Router1Cfg &cfg);
NEXTPNR_NAMESPACE_END

6
ecp5/arch.cc
View File

@ -428,7 +428,11 @@ delay_t Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, de
bool Arch::place() { return placer1(getCtx()); }
bool Arch::route() { return router1(getCtx()); }
bool Arch::route()
{
Router1Cfg cfg;
return router1(getCtx(), cfg);
}
// -----------------------------------------------------------------------

2
generic/arch.cc
View File

@ -420,7 +420,7 @@ delay_t getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t
bool Arch::place() { return placer1(getCtx()); }
bool Arch::route() { return router1(getCtx()); }
bool Arch::route() { return router1(getCtx(), Router1Cfg()); }
// ---------------------------------------------------------------

6
ice40/arch.cc
View File

@ -661,7 +661,11 @@ delay_t Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, de
bool Arch::place() { return placer1(getCtx()); }
bool Arch::route() { return router1(getCtx()); }
bool Arch::route()
{
Router1Cfg cfg;
return router1(getCtx(), cfg);
}
// -----------------------------------------------------------------------