Merge rust-lang#126

126: implement pow r=japaric a=japaric

cargo fmt version of rust-lang#125 
closes rust-lang#125 
closes rust-lang#124

Co-authored-by: Rahul Butani <rr.butani@gmail.com>
Co-authored-by: Jorge Aparicio <jorge@japaric.io>

Author: 3 people

src/lib.rs

@@ -343,7 +343,6 @@ pub trait F64Ext: private::Sealed + Sized {
     // NOTE depends on unstable intrinsics::powif64
     // fn powi(self, n: i32) -> Self;
 
-    #[cfg(todo)]
     fn powf(self, n: Self) -> Self;
 
     fn sqrt(self) -> Self;
@@ -463,7 +462,6 @@ impl F64Ext for f64 {
         }
     }
 
-    #[cfg(todo)]
     #[inline]
     fn powf(self, n: Self) -> Self {
         pow(self, n)

src/math/mod.rs

@@ -49,6 +49,7 @@ mod log1pf;
 mod log2;
 mod log2f;
 mod logf;
+mod pow;
 mod powf;
 mod round;
 mod roundf;
@@ -110,6 +111,7 @@ pub use self::log1pf::log1pf;
 pub use self::log2::log2;
 pub use self::log2f::log2f;
 pub use self::logf::logf;
+pub use self::pow::pow;
 pub use self::powf::powf;
 pub use self::round::round;
 pub use self::roundf::roundf;
@@ -167,7 +169,6 @@ fn get_low_word(x: f64) -> u32 {
     x.to_bits() as u32
 }
 
-#[allow(dead_code)]
 #[inline]
 fn with_set_high_word(f: f64, hi: u32) -> f64 {
     let mut tmp = f.to_bits();