Verilator and SystemPerl - Veripool

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Talking C++ inside Verilog• Verilator allows C++ code to be embedded directly inVerilog`systemc_include#include "MDebug.h"`systemc_headerpublic:int debug();`systemc_ctor__message = MDebug::debug();`systemc_implementationint debug() {return __message;}Place at the top of the generated header file.Place inside the class definition of thegenerated header file.Place in the constructor of thegenerated C++ file.Place in the generated C++ file.`verilogUse the C++ text "debug()" that returnsalways @ (posedge clk)a one bit value for this expression.if ($c1("debug()"))$write("Debug message…\n");Verilator Environment, NASCUG June 2004. Copyright 2004 by Wilson Snyder; redistribution allowed as complete presentation.8
Verilator Optimizations• Verilator performs many standard compileroptimizations– Netlist optimizations• wire b=~a;• wire c=~b;• wire d=c; // Inside the simulator, it will become "d=a"– Constant folding– Module, function and task inlining– Levelization– Coverage analysis• End result is Verilog simulation as fast as the leadingVerilog-only simulators.– It would beat them, but the SystemC kernel is slow…Verilator Environment, NASCUG June 2004. Copyright 2004 by Wilson Snyder; redistribution allowed as complete presentation.9
Page 1 and 2: Verilator andSystemPerlJune, 2004Wi
Page 3 and 4: Introduction• In 2000, we were st
Page 5 and 6: CAD FlowchartEmbeddedSoftwareTeamAr
Page 7: Example Translation• Inputs and o
Page 11 and 12: Faster SystemC Compiles• Our mode
Page 13 and 14: Conclusions• With the SystemPerl

Verilator and SystemPerl - Veripool

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