aboutsummaryrefslogtreecommitdiffstats
path: root/ice40/pack.cc
diff options
context:
space:
mode:
Diffstat (limited to 'ice40/pack.cc')
-rw-r--r--ice40/pack.cc102
1 files changed, 51 insertions, 51 deletions
diff --git a/ice40/pack.cc b/ice40/pack.cc
index 3e852a91..b8e2cb8f 100644
--- a/ice40/pack.cc
+++ b/ice40/pack.cc
@@ -28,18 +28,18 @@
NEXTPNR_NAMESPACE_BEGIN
// Pack LUTs and LUT-FF pairs
-static void pack_lut_lutffs(Design *design)
+static void pack_lut_lutffs(Context *ctx)
{
log_info("Packing LUT-FFs..\n");
std::unordered_set<IdString> packed_cells;
std::vector<CellInfo *> new_cells;
- for (auto cell : design->cells) {
+ for (auto cell : ctx->cells) {
CellInfo *ci = cell.second;
log_info("cell '%s' is of type '%s'\n", ci->name.c_str(),
ci->type.c_str());
if (is_lut(ci)) {
- CellInfo *packed = create_ice_cell(design, "ICESTORM_LC",
+ CellInfo *packed = create_ice_cell(ctx, "ICESTORM_LC",
ci->name.str() + "_LC");
std::copy(ci->attrs.begin(), ci->attrs.end(),
std::inserter(packed->attrs, packed->attrs.begin()));
@@ -62,7 +62,7 @@ static void pack_lut_lutffs(Design *design)
} else {
lut_to_lc(ci, packed, false);
dff_to_lc(dff, packed, false);
- design->nets.erase(o->name);
+ ctx->nets.erase(o->name);
if (dff_bel != dff->attrs.end())
packed->attrs["BEL"] = dff_bel->second;
packed_cells.insert(dff->name);
@@ -77,25 +77,25 @@ static void pack_lut_lutffs(Design *design)
}
}
for (auto pcell : packed_cells) {
- design->cells.erase(pcell);
+ ctx->cells.erase(pcell);
}
for (auto ncell : new_cells) {
- design->cells[ncell->name] = ncell;
+ ctx->cells[ncell->name] = ncell;
}
}
// Pack FFs not packed as LUTFFs
-static void pack_nonlut_ffs(Design *design)
+static void pack_nonlut_ffs(Context *ctx)
{
log_info("Packing non-LUT FFs..\n");
std::unordered_set<IdString> packed_cells;
std::vector<CellInfo *> new_cells;
- for (auto cell : design->cells) {
+ for (auto cell : ctx->cells) {
CellInfo *ci = cell.second;
if (is_ff(ci)) {
- CellInfo *packed = create_ice_cell(design, "ICESTORM_LC",
+ CellInfo *packed = create_ice_cell(ctx, "ICESTORM_LC",
ci->name.str() + "_DFFLC");
std::copy(ci->attrs.begin(), ci->attrs.end(),
std::inserter(packed->attrs, packed->attrs.begin()));
@@ -107,25 +107,25 @@ static void pack_nonlut_ffs(Design *design)
}
}
for (auto pcell : packed_cells) {
- design->cells.erase(pcell);
+ ctx->cells.erase(pcell);
}
for (auto ncell : new_cells) {
- design->cells[ncell->name] = ncell;
+ ctx->cells[ncell->name] = ncell;
}
}
// "Pack" RAMs
-static void pack_ram(Design *design)
+static void pack_ram(Context *ctx)
{
log_info("Packing RAMs..\n");
std::unordered_set<IdString> packed_cells;
std::vector<CellInfo *> new_cells;
- for (auto cell : design->cells) {
+ for (auto cell : ctx->cells) {
CellInfo *ci = cell.second;
if (is_ram(ci)) {
- CellInfo *packed = create_ice_cell(design, "ICESTORM_RAM",
+ CellInfo *packed = create_ice_cell(ctx, "ICESTORM_RAM",
ci->name.str() + "_RAM");
packed_cells.insert(ci->name);
new_cells.push_back(packed);
@@ -153,10 +153,10 @@ static void pack_ram(Design *design)
}
for (auto pcell : packed_cells) {
- design->cells.erase(pcell);
+ ctx->cells.erase(pcell);
}
for (auto ncell : new_cells) {
- design->cells[ncell->name] = ncell;
+ ctx->cells[ncell->name] = ncell;
}
}
@@ -180,18 +180,18 @@ static void set_net_constant(NetInfo *orig, NetInfo *constnet, bool constval)
}
// Pack constants (simple implementation)
-static void pack_constants(Design *design)
+static void pack_constants(Context *ctx)
{
log_info("Packing constants..\n");
- CellInfo *gnd_cell = create_ice_cell(design, "ICESTORM_LC", "$PACKER_GND");
+ CellInfo *gnd_cell = create_ice_cell(ctx, "ICESTORM_LC", "$PACKER_GND");
gnd_cell->params["LUT_INIT"] = "0";
NetInfo *gnd_net = new NetInfo;
gnd_net->name = "$PACKER_GND_NET";
gnd_net->driver.cell = gnd_cell;
gnd_net->driver.port = "O";
- CellInfo *vcc_cell = create_ice_cell(design, "ICESTORM_LC", "$PACKER_VCC");
+ CellInfo *vcc_cell = create_ice_cell(ctx, "ICESTORM_LC", "$PACKER_VCC");
vcc_cell->params["LUT_INIT"] = "1";
NetInfo *vcc_net = new NetInfo;
vcc_net->name = "$PACKER_VCC_NET";
@@ -200,24 +200,24 @@ static void pack_constants(Design *design)
std::vector<IdString> dead_nets;
- for (auto net : design->nets) {
+ for (auto net : ctx->nets) {
NetInfo *ni = net.second;
if (ni->driver.cell != nullptr && ni->driver.cell->type == "GND") {
set_net_constant(ni, gnd_net, false);
- design->cells[gnd_cell->name] = gnd_cell;
- design->nets[gnd_net->name] = gnd_net;
+ ctx->cells[gnd_cell->name] = gnd_cell;
+ ctx->nets[gnd_net->name] = gnd_net;
dead_nets.push_back(net.first);
} else if (ni->driver.cell != nullptr &&
ni->driver.cell->type == "VCC") {
set_net_constant(ni, vcc_net, true);
- design->cells[vcc_cell->name] = vcc_cell;
- design->nets[vcc_net->name] = vcc_net;
+ ctx->cells[vcc_cell->name] = vcc_cell;
+ ctx->nets[vcc_net->name] = vcc_net;
dead_nets.push_back(net.first);
}
}
for (auto dn : dead_nets)
- design->nets.erase(dn);
+ ctx->nets.erase(dn);
}
static bool is_nextpnr_iob(CellInfo *cell)
@@ -227,14 +227,14 @@ static bool is_nextpnr_iob(CellInfo *cell)
}
// Pack IO buffers
-static void pack_io(Design *design)
+static void pack_io(Context *ctx)
{
std::unordered_set<IdString> packed_cells;
std::vector<CellInfo *> new_cells;
log_info("Packing IOs..\n");
- for (auto cell : design->cells) {
+ for (auto cell : ctx->cells) {
CellInfo *ci = cell.second;
if (is_nextpnr_iob(ci)) {
CellInfo *sb = nullptr;
@@ -254,12 +254,12 @@ static void pack_io(Design *design)
ci->name.c_str());
NetInfo *net = sb->ports.at("PACKAGE_PIN").net;
if (net != nullptr) {
- design->nets.erase(net->name);
+ ctx->nets.erase(net->name);
sb->ports.at("PACKAGE_PIN").net = nullptr;
}
} else {
// Create a SB_IO buffer
- sb = create_ice_cell(design, "SB_IO");
+ sb = create_ice_cell(ctx, "SB_IO");
nxio_to_sb(ci, sb);
new_cells.push_back(sb);
}
@@ -269,19 +269,19 @@ static void pack_io(Design *design)
}
}
for (auto pcell : packed_cells) {
- design->cells.erase(pcell);
+ ctx->cells.erase(pcell);
}
for (auto ncell : new_cells) {
- design->cells[ncell->name] = ncell;
+ ctx->cells[ncell->name] = ncell;
}
}
-static void insert_global(Design *design, NetInfo *net, bool is_reset,
+static void insert_global(Context *ctx, NetInfo *net, bool is_reset,
bool is_cen)
{
std::string glb_name = net->name.str() + std::string("_$glb_") +
(is_reset ? "sr" : (is_cen ? "ce" : "clk"));
- CellInfo *gb = create_ice_cell(design, "SB_GB", "$gbuf_" + glb_name);
+ CellInfo *gb = create_ice_cell(ctx, "SB_GB", "$gbuf_" + glb_name);
gb->ports["USER_SIGNAL_TO_GLOBAL_BUFFER"].net = net;
PortRef pr;
pr.cell = gb;
@@ -293,7 +293,7 @@ static void insert_global(Design *design, NetInfo *net, bool is_reset,
NetInfo *glbnet = new NetInfo();
glbnet->name = glb_name;
glbnet->driver = pr;
- design->nets[glbnet->name] = glbnet;
+ ctx->nets[glbnet->name] = glbnet;
gb->ports["GLOBAL_BUFFER_OUTPUT"].net = glbnet;
std::vector<PortRef> keep_users;
for (auto user : net->users) {
@@ -306,16 +306,16 @@ static void insert_global(Design *design, NetInfo *net, bool is_reset,
}
}
net->users = keep_users;
- design->cells[gb->name] = gb;
+ ctx->cells[gb->name] = gb;
}
// Simple global promoter (clock only)
-static void promote_globals(Design *design)
+static void promote_globals(Context *ctx)
{
log_info("Promoting globals..\n");
std::unordered_map<IdString, int> clock_count, reset_count, cen_count;
- for (auto net : design->nets) {
+ for (auto net : ctx->nets) {
NetInfo *ni = net.second;
if (ni->driver.cell != nullptr && !is_global_net(ni)) {
clock_count[net.first] = 0;
@@ -334,7 +334,7 @@ static void promote_globals(Design *design)
}
int prom_globals = 0, prom_resets = 0, prom_cens = 0;
int gbs_available = 8;
- for (auto cell : design->cells)
+ for (auto cell : ctx->cells)
if (is_gbuf(cell.second))
--gbs_available;
while (prom_globals < gbs_available) {
@@ -358,24 +358,24 @@ static void promote_globals(Design *design)
return a.second < b.second;
});
if (global_reset->second > global_clock->second && prom_resets < 4) {
- NetInfo *rstnet = design->nets[global_reset->first];
- insert_global(design, rstnet, true, false);
+ NetInfo *rstnet = ctx->nets[global_reset->first];
+ insert_global(ctx, rstnet, true, false);
++prom_globals;
++prom_resets;
clock_count.erase(rstnet->name);
reset_count.erase(rstnet->name);
cen_count.erase(rstnet->name);
} else if (global_cen->second > global_clock->second && prom_cens < 4) {
- NetInfo *cennet = design->nets[global_cen->first];
- insert_global(design, cennet, false, true);
+ NetInfo *cennet = ctx->nets[global_cen->first];
+ insert_global(ctx, cennet, false, true);
++prom_globals;
++prom_cens;
clock_count.erase(cennet->name);
reset_count.erase(cennet->name);
cen_count.erase(cennet->name);
} else if (global_clock->second != 0) {
- NetInfo *clknet = design->nets[global_clock->first];
- insert_global(design, clknet, false, false);
+ NetInfo *clknet = ctx->nets[global_clock->first];
+ insert_global(ctx, clknet, false, false);
++prom_globals;
clock_count.erase(clknet->name);
reset_count.erase(clknet->name);
@@ -387,14 +387,14 @@ static void promote_globals(Design *design)
}
// Main pack function
-void pack_design(Design *design)
+void pack_design(Context *ctx)
{
- pack_constants(design);
- promote_globals(design);
- pack_io(design);
- pack_lut_lutffs(design);
- pack_nonlut_ffs(design);
- pack_ram(design);
+ pack_constants(ctx);
+ promote_globals(ctx);
+ pack_io(ctx);
+ pack_lut_lutffs(ctx);
+ pack_nonlut_ffs(ctx);
+ pack_ram(ctx);
}
NEXTPNR_NAMESPACE_END
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-14 21:28:14 +0000