286 lines
9.5 KiB
C++
286 lines
9.5 KiB
C++
/*
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* nextpnr -- Next Generation Place and Route
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*
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* Copyright (C) 2018 Clifford Wolf <clifford@symbioticeda.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "nextpnr.h"
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#include "log.h"
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NEXTPNR_NAMESPACE_BEGIN
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assertion_failure::assertion_failure(std::string msg, std::string expr_str, std::string filename, int line)
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: runtime_error("Assertion failure: " + msg + " (" + filename + ":" + std::to_string(line) + ")"), msg(msg),
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expr_str(expr_str), filename(filename), line(line)
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{
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log_flush();
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}
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void IdString::set(const BaseCtx *ctx, const std::string &s)
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{
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auto it = ctx->idstring_str_to_idx->find(s);
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if (it == ctx->idstring_str_to_idx->end()) {
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index = ctx->idstring_idx_to_str->size();
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auto insert_rc = ctx->idstring_str_to_idx->insert({s, index});
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ctx->idstring_idx_to_str->push_back(&insert_rc.first->first);
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} else {
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index = it->second;
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}
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}
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const std::string &IdString::str(const BaseCtx *ctx) const { return *ctx->idstring_idx_to_str->at(index); }
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const char *IdString::c_str(const BaseCtx *ctx) const { return str(ctx).c_str(); }
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void IdString::initialize_add(const BaseCtx *ctx, const char *s, int idx)
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{
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NPNR_ASSERT(ctx->idstring_str_to_idx->count(s) == 0);
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NPNR_ASSERT(int(ctx->idstring_idx_to_str->size()) == idx);
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auto insert_rc = ctx->idstring_str_to_idx->insert({s, idx});
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ctx->idstring_idx_to_str->push_back(&insert_rc.first->first);
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}
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WireId Context::getNetinfoSourceWire(const NetInfo *net_info) const
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{
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if (net_info->driver.cell == nullptr)
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return WireId();
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auto src_bel = net_info->driver.cell->bel;
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if (src_bel == BelId())
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return WireId();
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IdString driver_port = net_info->driver.port;
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auto driver_port_it = net_info->driver.cell->pins.find(driver_port);
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if (driver_port_it != net_info->driver.cell->pins.end())
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driver_port = driver_port_it->second;
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return getBelPinWire(src_bel, driver_port);
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}
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WireId Context::getNetinfoSinkWire(const NetInfo *net_info, const PortRef &user_info) const
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{
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auto dst_bel = user_info.cell->bel;
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if (dst_bel == BelId())
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return WireId();
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IdString user_port = user_info.port;
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auto user_port_it = user_info.cell->pins.find(user_port);
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if (user_port_it != user_info.cell->pins.end())
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user_port = user_port_it->second;
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return getBelPinWire(dst_bel, user_port);
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}
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delay_t Context::getNetinfoRouteDelay(const NetInfo *net_info, const PortRef &user_info) const
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{
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#ifdef ARCH_ECP5
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if (net_info->is_global)
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return 0;
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#endif
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WireId src_wire = getNetinfoSourceWire(net_info);
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if (src_wire == WireId())
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return 0;
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WireId dst_wire = getNetinfoSinkWire(net_info, user_info);
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WireId cursor = dst_wire;
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delay_t delay = 0;
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while (cursor != WireId() && cursor != src_wire) {
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auto it = net_info->wires.find(cursor);
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if (it == net_info->wires.end())
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break;
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PipId pip = it->second.pip;
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delay += getPipDelay(pip).maxDelay();
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delay += getWireDelay(cursor).maxDelay();
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cursor = getPipSrcWire(pip);
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}
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if (cursor == src_wire)
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return delay + getWireDelay(src_wire).maxDelay();
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return predictDelay(net_info, user_info);
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}
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static uint32_t xorshift32(uint32_t x)
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{
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x ^= x << 13;
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x ^= x >> 17;
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x ^= x << 5;
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return x;
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}
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uint32_t Context::checksum() const
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{
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uint32_t cksum = xorshift32(123456789);
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uint32_t cksum_nets_sum = 0;
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for (auto &it : nets) {
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auto &ni = *it.second;
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uint32_t x = 123456789;
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x = xorshift32(x + xorshift32(it.first.index));
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x = xorshift32(x + xorshift32(ni.name.index));
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if (ni.driver.cell)
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x = xorshift32(x + xorshift32(ni.driver.cell->name.index));
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x = xorshift32(x + xorshift32(ni.driver.port.index));
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x = xorshift32(x + xorshift32(getDelayChecksum(ni.driver.budget)));
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for (auto &u : ni.users) {
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if (u.cell)
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x = xorshift32(x + xorshift32(u.cell->name.index));
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x = xorshift32(x + xorshift32(u.port.index));
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x = xorshift32(x + xorshift32(getDelayChecksum(u.budget)));
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}
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uint32_t attr_x_sum = 0;
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for (auto &a : ni.attrs) {
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uint32_t attr_x = 123456789;
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attr_x = xorshift32(attr_x + xorshift32(a.first.index));
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for (uint8_t ch : a.second)
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attr_x = xorshift32(attr_x + xorshift32(ch));
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attr_x_sum += attr_x;
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}
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x = xorshift32(x + xorshift32(attr_x_sum));
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uint32_t wire_x_sum = 0;
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for (auto &w : ni.wires) {
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uint32_t wire_x = 123456789;
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wire_x = xorshift32(wire_x + xorshift32(getWireChecksum(w.first)));
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wire_x = xorshift32(wire_x + xorshift32(getPipChecksum(w.second.pip)));
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wire_x = xorshift32(wire_x + xorshift32(int(w.second.strength)));
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wire_x_sum += wire_x;
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}
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x = xorshift32(x + xorshift32(wire_x_sum));
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cksum_nets_sum += x;
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}
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cksum = xorshift32(cksum + xorshift32(cksum_nets_sum));
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uint32_t cksum_cells_sum = 0;
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for (auto &it : cells) {
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auto &ci = *it.second;
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uint32_t x = 123456789;
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x = xorshift32(x + xorshift32(it.first.index));
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x = xorshift32(x + xorshift32(ci.name.index));
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x = xorshift32(x + xorshift32(ci.type.index));
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uint32_t port_x_sum = 0;
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for (auto &p : ci.ports) {
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uint32_t port_x = 123456789;
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port_x = xorshift32(port_x + xorshift32(p.first.index));
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port_x = xorshift32(port_x + xorshift32(p.second.name.index));
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if (p.second.net)
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port_x = xorshift32(port_x + xorshift32(p.second.net->name.index));
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port_x = xorshift32(port_x + xorshift32(p.second.type));
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port_x_sum += port_x;
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}
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x = xorshift32(x + xorshift32(port_x_sum));
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uint32_t attr_x_sum = 0;
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for (auto &a : ci.attrs) {
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uint32_t attr_x = 123456789;
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attr_x = xorshift32(attr_x + xorshift32(a.first.index));
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for (uint8_t ch : a.second)
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attr_x = xorshift32(attr_x + xorshift32(ch));
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attr_x_sum += attr_x;
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}
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x = xorshift32(x + xorshift32(attr_x_sum));
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uint32_t param_x_sum = 0;
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for (auto &p : ci.params) {
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uint32_t param_x = 123456789;
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param_x = xorshift32(param_x + xorshift32(p.first.index));
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for (uint8_t ch : p.second)
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param_x = xorshift32(param_x + xorshift32(ch));
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param_x_sum += param_x;
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}
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x = xorshift32(x + xorshift32(param_x_sum));
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x = xorshift32(x + xorshift32(getBelChecksum(ci.bel)));
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x = xorshift32(x + xorshift32(ci.belStrength));
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uint32_t pin_x_sum = 0;
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for (auto &a : ci.pins) {
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uint32_t pin_x = 123456789;
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pin_x = xorshift32(pin_x + xorshift32(a.first.index));
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pin_x = xorshift32(pin_x + xorshift32(a.second.index));
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pin_x_sum += pin_x;
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}
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x = xorshift32(x + xorshift32(pin_x_sum));
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cksum_cells_sum += x;
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}
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cksum = xorshift32(cksum + xorshift32(cksum_cells_sum));
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return cksum;
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}
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void Context::check() const
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{
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for (auto &n : nets) {
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auto ni = n.second.get();
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NPNR_ASSERT(n.first == ni->name);
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for (auto &w : ni->wires) {
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NPNR_ASSERT(ni == getBoundWireNet(w.first));
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if (w.second.pip != PipId()) {
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NPNR_ASSERT(w.first == getPipDstWire(w.second.pip));
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NPNR_ASSERT(ni == getBoundPipNet(w.second.pip));
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}
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}
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if (ni->driver.cell != nullptr)
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NPNR_ASSERT(ni->driver.cell->ports.at(ni->driver.port).net == ni);
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for (auto user : ni->users) {
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NPNR_ASSERT(user.cell->ports.at(user.port).net == ni);
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}
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}
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for (auto w : getWires()) {
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auto ni = getBoundWireNet(w);
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if (ni != nullptr) {
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NPNR_ASSERT(ni->wires.count(w));
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}
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}
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for (auto &c : cells) {
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auto ci = c.second.get();
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NPNR_ASSERT(c.first == ci->name);
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if (ci->bel != BelId())
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NPNR_ASSERT(getBoundBelCell(c.second->bel) == ci);
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for (auto &port : c.second->ports) {
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NetInfo *net = port.second.net;
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if (net != nullptr) {
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NPNR_ASSERT(nets.find(net->name) != nets.end());
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if (port.second.type == PORT_OUT) {
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NPNR_ASSERT(net->driver.cell == c.second.get() && net->driver.port == port.first);
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} else if (port.second.type == PORT_IN) {
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NPNR_ASSERT(std::count_if(net->users.begin(), net->users.end(), [&](const PortRef &pr) {
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return pr.cell == c.second.get() && pr.port == port.first;
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}) == 1);
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}
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}
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}
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}
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}
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NEXTPNR_NAMESPACE_END
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