SystemVerilog通過DPI調用C++

SystemVerilog測試代碼：

`timescale 1ns / 1ns
module dpi_test;

real    a;
real    s;
string  str;

import "DPI-C" function real c_sin(real x);

initial begin
    void'($value$plusargs("str=%s", str));
    $display("arg = %s", str);

    a = 3.141592654/6.0;
    s = c_sin(a);
    $display("s = sin(a) = %f", s);
    $finish;
end

endmodule

C++程序：

#include "svdpi.h"
#include "math.h"
#include "vc_hdrs.h"

#ifdef __cplusplus
    extern "C" {
#endif

double c_sin(double x)
{
    return sin(x);
}

#ifdef __cplusplus
}   
#endif

使用VCS編譯運行：

 cmp: @vcs -LDFLAGS -Wl,--no-as-needed -debug_all +lint=TFIPC-L +lint=PCWM -P ${NOVAS_HOME}/share/PLI/VCS/LINUX/novas.tab ${NOVAS_HOME}/share/PLI/VCS/LINUX/pli.a -sverilog dpi_test.sv dpi_sin.c -top dpi_test -l vcs.log

run: @./simv +str=myars -l simv.log