zig/test/cases/popcount.zig
2018-07-07 00:25:32 -04:00

25 lines
485 B
Zig

const assert = @import("std").debug.assert;
test "@popCount" {
comptime testPopCount();
testPopCount();
}
fn testPopCount() void {
{
var x: u32 = 0xaa;
assert(@popCount(x) == 4);
}
{
var x: u32 = 0xaaaaaaaa;
assert(@popCount(x) == 16);
}
{
var x: i16 = -1;
assert(@popCount(x) == 16);
}
comptime {
assert(@popCount(0b11111111000110001100010000100001000011000011100101010001) == 24);
}
}