SystemVerilog DPI in irun

module real_test ();

// map the C function name to the Verilog function name

import "DPI-C" context get_real_c = function real get_real_v ();

import "DPI-C" context put_real_c = function void put_real_v (real x);     

real pi;

initial

begin

$display("real_test");

pi = get_real_v();        // get a real number from the C code

$display("pi = %f", pi);  // display it

put_real_v(pi);           // send the real number back to C code  

  

end

endmodule

#include "svdpi.h"

// since we are using math functions, include the math library

#include <math.h>

// can use io_printf() instead of printf() to put into ncsim.log file

double get_real_c() {  // imported SV function

  // exercise DPI function - get calling scope

  printf("Function Calling HDL scope is %s \n", svGetNameFromScope(svGetScope() ) );

  return 3.14159;

}

void put_real_c(double n) {  // imported SV function

  // exercise DPI function - get calling scope

  printf("Function Calling HDL scope is %s \n", svGetNameFromScope(svGetScope() ) );

  printf("pi + 5.0 = %f\n", n+5.0);      

}

gcc -fPIC -g -shared -o libdpi.so  real_dpi.c  -I/`ncroot`/tools/include

irun -64 real_test.sv

or

ncvlog real_test.v -sv

ncelab -dpiheader dpi.h worklib.real_test:module

ncsim worklib.real_test:module -sv_lib libdpi.so  -sv_root .