Add cfg for f128

Author: workingjubilee

src/float/bitops.rs

@@ -12,6 +12,7 @@ fn fabs_f64(f: f64) -> f64 {
 }
 
 // FIXME: delete when we move fabs to core and it reaches stable
+#[cfg(f128_enabled)]
 fn fabs_128(f: f128) -> f128 {
     f128::from_bits(f.to_bits() & const { !(i128::MIN as u128) })
 }
@@ -26,6 +27,7 @@ fn copysign_f64(magnitude: f64, sign: f64) -> f64 {
     f64::from_bits(fabs_f64(magnitude).to_bits() | sign)
 }
 
+#[cfg(f128_enabled)]
 fn copysign_f128(magnitude: f128, sign: f128) -> f128 {
     let sign = fabs_128(sign).to_bits() ^ sign.to_bits();
     f128::from_bits(fabs_128(magnitude).to_bits() | sign)
@@ -42,11 +44,13 @@ intrinsics! {
         copysign_f64(magnitude, sign)
     }
 
+    #[cfg(f128_enabled)]
     #[cfg(not(any(target_arch = "x86", target_arch = "x86_64", target_arch = "powerpc", target_arch = "powerpc64")))]
     pub extern "C" fn copysignl(magnitude: f128, sign: f128) -> f128 {
         copysign_f128(magnitude, sign)
     }
 
+    #[cfg(f128_enabled)]
     #[cfg(any(target_arch = "x86_64", target_arch = "x86_64", target_arch = "powerpc", target_arch = "powerpc64"))]
     pub extern "C" fn copysignf128(magnitude: f128, sign: f128) -> f128 {
         copysign_f128(magnitude, sign)