Function floorPowerOfTwo [src]

Returns the nearest power of two less than or equal to value, or zero if value is less than or equal to zero.

Prototype

pub fn floorPowerOfTwo(comptime T: type, value: T) T

Parameters

T: typevalue: T

Example

 test floorPowerOfTwo {
    try testFloorPowerOfTwo();
    try comptime testFloorPowerOfTwo();
}

Source

  pub fn floorPowerOfTwo(comptime T: type, value: T) T {
    const uT = std.meta.Int(.unsigned, @typeInfo(T).int.bits);
    if (value <= 0) return 0;
    return @as(T, 1) << log2_int(uT, @as(uT, @intCast(value)));
}  