Zig 0.17.0-dev (Split by item)

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copysign

Returns a value with the magnitude of magnitude and the sign of sign.

copysign.copysign

pub fn copysign(magnitude: anytype, sign: @TypeOf(magnitude)) @TypeOf(magnitude)

File

lib/std/math/copysign.zig:6

Code

pub fn copysign(magnitude: anytype, sign: @TypeOf(magnitude)) @TypeOf(magnitude) {
    const T = @TypeOf(magnitude);
    const TBits = @Int(.unsigned, @typeInfo(T).float.bits);
    const sign_bit_mask = @as(TBits, 1) << (@bitSizeOf(T) - 1);
    const mag = @as(TBits, @bitCast(magnitude)) & ~sign_bit_mask;
    const sgn = @as(TBits, @bitCast(sign)) & sign_bit_mask;
    return @as(T, @bitCast(mag | sgn));
}