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Conversion dec to hex


ciccio.greco88

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How do you see, whether a value has a decimal or hexadecimal representation? Most probably, it is stored in some form of binary in the memory. ;-)

But you can directly assign both hex literals (C++ feature) and hex strings (SystemC datatypes feature) to sc_uint variables:

#include <systemc.h>
int sc_main(int,char*[])
{
 sc_uint<32> pippo;
 // ...
 pippo =  0x2A;   // assign from hex literal
 pippo = "0x0A2"; // assign from hex string

 std::cout << pippo // decimal value by default
    << "="
    << pippo.to_string(SC_HEX) // SystemC hex representation
    << " (0x" << std::hex << pippo <<")" // C++ hex representation (with manual '0x' prefix)
    << std::endl;
 return 0;
}

Gotcha: In SystemC, hex strings are signed literals by default. When dealing with unsigned variables (sc_uint, et.al), you should make sure that the hex string contains a leading 0 to avoid unexpected sign extension, when converting from the hex string.

Greetings from Oldenburg,

Philipp

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