diff --git a/library/compiler-builtins/libm/CHANGELOG.md b/library/compiler-builtins/libm/CHANGELOG.md
index 3a496527bc04..107813b08136 100644
--- a/library/compiler-builtins/libm/CHANGELOG.md
+++ b/library/compiler-builtins/libm/CHANGELOG.md
@@ -5,6 +5,19 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Added
+
+- atan2f
+- cos
+- coshf
+- fmaf
+- sin
+- sinh
+- sinhf
+- tan
+- tanh
+- tanhf
+
 ## [v0.1.1] - 2018-07-14
 
 ### Added
diff --git a/library/compiler-builtins/libm/src/math/mod.rs b/library/compiler-builtins/libm/src/math/mod.rs
index c6a3424d8ad2..7fa4252077d7 100644
--- a/library/compiler-builtins/libm/src/math/mod.rs
+++ b/library/compiler-builtins/libm/src/math/mod.rs
@@ -150,17 +150,18 @@ use self::rem_pio2_large::rem_pio2_large;
 use self::rem_pio2f::rem_pio2f;
 
 #[inline]
-pub fn get_high_word(x: f64) -> u32 {
+fn get_high_word(x: f64) -> u32 {
     (x.to_bits() >> 32) as u32
 }
 
 #[inline]
-pub fn get_low_word(x: f64) -> u32 {
+fn get_low_word(x: f64) -> u32 {
     x.to_bits() as u32
 }
 
+#[allow(dead_code)]
 #[inline]
-pub fn with_set_high_word(f: f64, hi: u32) -> f64 {
+fn with_set_high_word(f: f64, hi: u32) -> f64 {
     let mut tmp = f.to_bits();
     tmp &= 0x00000000_ffffffff;
     tmp |= (hi as u64) << 32;
@@ -168,7 +169,7 @@ pub fn with_set_high_word(f: f64, hi: u32) -> f64 {
 }
 
 #[inline]
-pub fn with_set_low_word(f: f64, lo: u32) -> f64 {
+fn with_set_low_word(f: f64, lo: u32) -> f64 {
     let mut tmp = f.to_bits();
     tmp &= 0xffffffff_00000000;
     tmp |= lo as u64;