id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12790	Left shift does not work on 32 bit Linux and MSVC 2015 (32 and 64 bits)	mika.fischer@…	John Maddock	"The following test program creates an unsigned 160 bit unsigned integer  with all bits set and shifts it by six bits to the left.

On 64 bit Linux, the expected result (F...FC0) is returned. But on 32 bit Linux and MSVC 2015 (32 bit as well as 64 bit), the incorrect result (F...FC000000000) is returned.

{{{
#include <boost/multiprecision/cpp_int.hpp>

namespace mp = boost::multiprecision;
using namespace std;

typedef mp::number<mp::cpp_int_backend<20*8, 20*8, mp::unsigned_magnitude, mp::unchecked, void> > number_t;

int main()
{
    number_t n = -1;
    cout << hex << n << endl;
    n = n << 6;
    cout << hex << n << endl;
}

}}}
"	Bugs	closed	Boost 1.64.0	multiprecision	Boost 1.62.0	Problem	fixed		mika.fischer@…