1 /// Sign of Y, magnitude of X (f32) 2 /// 3 /// Constructs a number with the magnitude (absolute value) of its 4 /// first argument, `x`, and the sign of its second argument, `y`. copysignf(x: f32, y: f32) -> f325pub fn copysignf(x: f32, y: f32) -> f32 { 6 let mut ux = x.to_bits(); 7 let uy = y.to_bits(); 8 ux &= 0x7fffffff; 9 ux |= uy & 0x80000000; 10 f32::from_bits(ux) 11 } 12