forked from github/verilator
139 lines
4.7 KiB
C++
139 lines
4.7 KiB
C++
// -*- mode: C++; c-file-style: "cc-mode" -*-
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//=============================================================================
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//
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// Copyright 2001-2023 by Wilson Snyder. This program is free software; you can
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// redistribute it and/or modify it under the terms of either the GNU
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// Lesser General Public License Version 3 or the Perl Artistic License
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// Version 2.0.
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// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
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//
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//=============================================================================
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///
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/// \file
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/// \brief Verilated tracing in VCD format for SystemC header
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///
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/// User wrapper code should use this header when creating VCD SystemC
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/// traces.
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///
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/// This class is not threadsafe, as the SystemC kernel is not threadsafe.
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///
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//=============================================================================
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#ifndef VERILATOR_VERILATED_VCD_SC_H_
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#define VERILATOR_VERILATED_VCD_SC_H_
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#include "verilatedos.h"
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#include "verilated_sc.h"
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#include "verilated_vcd_c.h"
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#include <string>
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//=============================================================================
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// VerilatedVcdSc
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///
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/// Class representing a Verilator-friendly VCD trace format registered
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/// with the SystemC simulation kernel, just like a SystemC-documented
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/// trace format.
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class VerilatedVcdSc final : sc_trace_file, public VerilatedVcdC {
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// CONSTRUCTORS
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VL_UNCOPYABLE(VerilatedVcdSc);
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public:
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/// Construct a SC trace object, and register with the SystemC kernel
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VerilatedVcdSc() {
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sc_get_curr_simcontext()->add_trace_file(this);
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// We want to avoid a depreciated warning, but still be back compatible.
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// Turning off the message just for this still results in an
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// annoying "to turn off" message.
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const sc_time t1sec{1, SC_SEC};
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if (t1sec.to_default_time_units() != 0) {
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const sc_time tunits{1.0 / t1sec.to_default_time_units(), SC_SEC};
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spTrace()->set_time_unit(tunits.to_string());
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}
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spTrace()->set_time_resolution(sc_get_time_resolution().to_string());
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}
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/// Destruct, flush, and close the dump
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~VerilatedVcdSc() override { close(); }
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// METHODS - for SC kernel
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// Called by SystemC simulate()
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void cycle(bool delta_cycle) override {
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if (!delta_cycle) this->dump(sc_time_stamp().to_double());
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}
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// Override VerilatedVcdC. Must be called after starting simulation.
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void open(const char* filename) override VL_MT_SAFE {
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if (VL_UNLIKELY(!sc_core::sc_get_curr_simcontext()->elaboration_done())) {
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Verilated::scTraceBeforeElaborationError();
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}
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VerilatedVcdC::open(filename);
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}
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private:
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// METHODS - Fake outs for linker
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#ifdef NC_SYSTEMC
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// Cadence Incisive has these as abstract functions so we must create them
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void set_time_unit(int exponent10_seconds) override {} // deprecated
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#endif
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void set_time_unit(double v, sc_time_unit tu) override {} // LCOV_EXCL_LINE
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//--------------------------------------------------
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// SystemC 2.1.v1
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void write_comment(const std::string&) override {}
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void trace(const unsigned int&, const std::string&, const char**) override {}
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#define DECL_TRACE_METHOD_A(tp) \
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void trace(const tp& object, const std::string& name) override {}
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#define DECL_TRACE_METHOD_B(tp) \
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void trace(const tp& object, const std::string& name, int width) override {}
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// clang-format off
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// Formatting matches that of sc_trace.h
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// LCOV_EXCL_START
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#if (SYSTEMC_VERSION >= 20171012)
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DECL_TRACE_METHOD_A( sc_event )
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DECL_TRACE_METHOD_A( sc_time )
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#endif
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DECL_TRACE_METHOD_A( bool )
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DECL_TRACE_METHOD_A( sc_dt::sc_bit )
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DECL_TRACE_METHOD_A( sc_dt::sc_logic )
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DECL_TRACE_METHOD_B( unsigned char )
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DECL_TRACE_METHOD_B( unsigned short )
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DECL_TRACE_METHOD_B( unsigned int )
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DECL_TRACE_METHOD_B( unsigned long )
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DECL_TRACE_METHOD_B( char )
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DECL_TRACE_METHOD_B( short )
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DECL_TRACE_METHOD_B( int )
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DECL_TRACE_METHOD_B( long )
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DECL_TRACE_METHOD_B( sc_dt::int64 )
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DECL_TRACE_METHOD_B( sc_dt::uint64 )
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DECL_TRACE_METHOD_A( float )
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DECL_TRACE_METHOD_A( double )
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DECL_TRACE_METHOD_A( sc_dt::sc_int_base )
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DECL_TRACE_METHOD_A( sc_dt::sc_uint_base )
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DECL_TRACE_METHOD_A( sc_dt::sc_signed )
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DECL_TRACE_METHOD_A( sc_dt::sc_unsigned )
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DECL_TRACE_METHOD_A( sc_dt::sc_fxval )
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DECL_TRACE_METHOD_A( sc_dt::sc_fxval_fast )
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DECL_TRACE_METHOD_A( sc_dt::sc_fxnum )
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DECL_TRACE_METHOD_A( sc_dt::sc_fxnum_fast )
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DECL_TRACE_METHOD_A( sc_dt::sc_bv_base )
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DECL_TRACE_METHOD_A( sc_dt::sc_lv_base )
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// LCOV_EXCL_STOP
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// clang-format on
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#undef DECL_TRACE_METHOD_A
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#undef DECL_TRACE_METHOD_B
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};
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#endif // Guard
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