    const std = @import("std");
    const expect = std.testing.expect;

    /// Returns a * FLT_RADIX ^ exp.
    ///
    /// Zig only supports binary radix IEEE-754 floats. Hence FLT_RADIX=2, and this is an alias for ldexp.
    pub const scalbn = @import("ldexp.zig").ldexp;

    test "math.scalbn" {
        // Verify we are using radix 2.

        try expect(scalbn(@as(f16, 1.5), 4) == 24.0);
        try expect(scalbn(@as(f32, 1.5), 4) == 24.0);
        try expect(scalbn(@as(f64, 1.5), 4) == 24.0);
        try expect(scalbn(@as(f128, 1.5), 4) == 24.0);
    }