diff --git a/src/libstd/num/cmath.rs b/src/libstd/num/cmath.rs
index 4c1752d556cb4..13c4a812ec400 100644
--- a/src/libstd/num/cmath.rs
+++ b/src/libstd/num/cmath.rs
@@ -28,26 +28,15 @@ pub mod c_double {
         pub fn atan(n: c_double) -> c_double;
         pub fn atan2(a: c_double, b: c_double) -> c_double;
         pub fn cbrt(n: c_double) -> c_double;
-        pub fn ceil(n: c_double) -> c_double;
-        pub fn copysign(x: c_double, y: c_double) -> c_double;
-        pub fn cos(n: c_double) -> c_double;
         pub fn cosh(n: c_double) -> c_double;
         pub fn erf(n: c_double) -> c_double;
         pub fn erfc(n: c_double) -> c_double;
-        pub fn exp(n: c_double) -> c_double;
         // rename: for consistency with underscore usage elsewhere
         #[link_name="expm1"]
         pub fn exp_m1(n: c_double) -> c_double;
-        pub fn exp2(n: c_double) -> c_double;
-        #[link_name="fabs"]
-        pub fn abs(n: c_double) -> c_double;
         // rename: for clarity and consistency with add/sub/mul/div
         #[link_name="fdim"]
         pub fn abs_sub(a: c_double, b: c_double) -> c_double;
-        pub fn floor(n: c_double) -> c_double;
-        // rename: for clarity and consistency with add/sub/mul/div
-        #[link_name="fma"]
-        pub fn mul_add(a: c_double, b: c_double, c: c_double) -> c_double;
         #[link_name="fmax"]
         pub fn fmax(a: c_double, b: c_double) -> c_double;
         #[link_name="fmin"]
@@ -63,34 +52,22 @@ pub mod c_double {
         #[cfg(windows)]
         #[link_name="__lgamma_r"]
         pub fn lgamma(n: c_double, sign: &mut c_int) -> c_double;
-        // renamed: ln seems more natural
-        #[link_name="log"]
-        pub fn ln(n: c_double) -> c_double;
         // renamed: "logb" /often/ is confused for log2 by beginners
         #[link_name="logb"]
         pub fn log_radix(n: c_double) -> c_double;
         // renamed: to be consitent with log as ln
         #[link_name="log1p"]
         pub fn ln_1p(n: c_double) -> c_double;
-        pub fn log10(n: c_double) -> c_double;
-        pub fn log2(n: c_double) -> c_double;
         #[link_name="ilogb"]
         pub fn ilog_radix(n: c_double) -> c_int;
         pub fn modf(n: c_double, iptr: &mut c_double) -> c_double;
-        pub fn pow(n: c_double, e: c_double) -> c_double;
-        // FIXME (#1379): enable when rounding modes become available
-        //    fn rint(n: c_double) -> c_double;
-        pub fn round(n: c_double) -> c_double;
         // rename: for consistency with logradix
         #[link_name="scalbn"]
         pub fn ldexp_radix(n: c_double, i: c_int) -> c_double;
-        pub fn sin(n: c_double) -> c_double;
         pub fn sinh(n: c_double) -> c_double;
-        pub fn sqrt(n: c_double) -> c_double;
         pub fn tan(n: c_double) -> c_double;
         pub fn tanh(n: c_double) -> c_double;
         pub fn tgamma(n: c_double) -> c_double;
-        pub fn trunc(n: c_double) -> c_double;
 
         // These are commonly only available for doubles
 
@@ -121,34 +98,18 @@ pub mod c_float {
         pub fn atan2(a: c_float, b: c_float) -> c_float;
         #[link_name="cbrtf"]
         pub fn cbrt(n: c_float) -> c_float;
-        #[link_name="ceilf"]
-        pub fn ceil(n: c_float) -> c_float;
-        #[link_name="copysignf"]
-        pub fn copysign(x: c_float, y: c_float) -> c_float;
-        #[link_name="cosf"]
-        pub fn cos(n: c_float) -> c_float;
         #[link_name="coshf"]
         pub fn cosh(n: c_float) -> c_float;
         #[link_name="erff"]
         pub fn erf(n: c_float) -> c_float;
         #[link_name="erfcf"]
         pub fn erfc(n: c_float) -> c_float;
-        #[link_name="expf"]
-        pub fn exp(n: c_float) -> c_float;
         #[link_name="expm1f"]
         pub fn exp_m1(n: c_float) -> c_float;
-        #[link_name="exp2f"]
-        pub fn exp2(n: c_float) -> c_float;
-        #[link_name="fabsf"]
-        pub fn abs(n: c_float) -> c_float;
         #[link_name="fdimf"]
         pub fn abs_sub(a: c_float, b: c_float) -> c_float;
-        #[link_name="floorf"]
-        pub fn floor(n: c_float) -> c_float;
         #[link_name="frexpf"]
         pub fn frexp(n: c_float, value: &mut c_int) -> c_float;
-        #[link_name="fmaf"]
-        pub fn mul_add(a: c_float, b: c_float, c: c_float) -> c_float;
         #[link_name="fmaxf"]
         pub fn fmax(a: c_float, b: c_float) -> c_float;
         #[link_name="fminf"]
@@ -168,41 +129,23 @@ pub mod c_float {
         #[link_name="__lgammaf_r"]
         pub fn lgamma(n: c_float, sign: &mut c_int) -> c_float;
 
-        #[link_name="logf"]
-        pub fn ln(n: c_float) -> c_float;
         #[link_name="logbf"]
         pub fn log_radix(n: c_float) -> c_float;
         #[link_name="log1pf"]
         pub fn ln_1p(n: c_float) -> c_float;
-        #[link_name="log2f"]
-        pub fn log2(n: c_float) -> c_float;
-        #[link_name="log10f"]
-        pub fn log10(n: c_float) -> c_float;
         #[link_name="ilogbf"]
         pub fn ilog_radix(n: c_float) -> c_int;
         #[link_name="modff"]
         pub fn modf(n: c_float, iptr: &mut c_float) -> c_float;
-        #[link_name="powf"]
-        pub fn pow(n: c_float, e: c_float) -> c_float;
-        // FIXME (#1379): enable when rounding modes become available
-        //    #[link_name="rintf"] fn rint(n: c_float) -> c_float;
-        #[link_name="roundf"]
-        pub fn round(n: c_float) -> c_float;
         #[link_name="scalbnf"]
         pub fn ldexp_radix(n: c_float, i: c_int) -> c_float;
-        #[link_name="sinf"]
-        pub fn sin(n: c_float) -> c_float;
         #[link_name="sinhf"]
         pub fn sinh(n: c_float) -> c_float;
-        #[link_name="sqrtf"]
-        pub fn sqrt(n: c_float) -> c_float;
         #[link_name="tanf"]
         pub fn tan(n: c_float) -> c_float;
         #[link_name="tanhf"]
         pub fn tanh(n: c_float) -> c_float;
         #[link_name="tgammaf"]
         pub fn tgamma(n: c_float) -> c_float;
-        #[link_name="truncf"]
-        pub fn trunc(n: c_float) -> c_float;
     }
 }
diff --git a/src/libstd/num/f32.rs b/src/libstd/num/f32.rs
index a686edef99e69..9ec028b76b956 100644
--- a/src/libstd/num/f32.rs
+++ b/src/libstd/num/f32.rs
@@ -9,6 +9,7 @@
 // except according to those terms.
 
 //! Operations and constants for 32-bits floats (`f32` type)
+
 #[allow(missing_doc)];
 
 use prelude::*;
@@ -45,29 +46,25 @@ macro_rules! delegate(
 
 delegate!(
     // intrinsics
-    fn abs(n: f32) -> f32 = intrinsics::fabsf32,
+    fn sqrt(n: f32) -> f32 = intrinsics::sqrtf32,
+    fn powi(n: f32, e: i32) -> f32 = intrinsics::powif32,
+    fn sin(n: f32) -> f32 = intrinsics::sinf32,
     fn cos(n: f32) -> f32 = intrinsics::cosf32,
+    fn pow(n: f32, e: f32) -> f32 = intrinsics::powf32,
     fn exp(n: f32) -> f32 = intrinsics::expf32,
     fn exp2(n: f32) -> f32 = intrinsics::exp2f32,
-    fn floor(x: f32) -> f32 = intrinsics::floorf32,
     fn ln(n: f32) -> f32 = intrinsics::logf32,
     fn log10(n: f32) -> f32 = intrinsics::log10f32,
     fn log2(n: f32) -> f32 = intrinsics::log2f32,
     fn mul_add(a: f32, b: f32, c: f32) -> f32 = intrinsics::fmaf32,
-    fn pow(n: f32, e: f32) -> f32 = intrinsics::powf32,
-    // fn powi(n: f32, e: c_int) -> f32 = intrinsics::powif32,
-    fn sin(n: f32) -> f32 = intrinsics::sinf32,
-    fn sqrt(n: f32) -> f32 = intrinsics::sqrtf32,
-
-    // LLVM 3.3 required to use intrinsics for these four
-    fn ceil(n: c_float) -> c_float = cmath::c_float::ceil,
-    fn trunc(n: c_float) -> c_float = cmath::c_float::trunc,
-    /*
+    fn abs(n: f32) -> f32 = intrinsics::fabsf32,
+    fn copysign(x: f32, y: f32) -> f32 = intrinsics::copysignf32,
+    fn floor(x: f32) -> f32 = intrinsics::floorf32,
     fn ceil(n: f32) -> f32 = intrinsics::ceilf32,
     fn trunc(n: f32) -> f32 = intrinsics::truncf32,
     fn rint(n: f32) -> f32 = intrinsics::rintf32,
     fn nearbyint(n: f32) -> f32 = intrinsics::nearbyintf32,
-    */
+    fn round(n: f32) -> f32 = intrinsics::roundf32,
 
     // cmath
     fn acos(n: c_float) -> c_float = cmath::c_float::acos,
@@ -75,7 +72,6 @@ delegate!(
     fn atan(n: c_float) -> c_float = cmath::c_float::atan,
     fn atan2(a: c_float, b: c_float) -> c_float = cmath::c_float::atan2,
     fn cbrt(n: c_float) -> c_float = cmath::c_float::cbrt,
-    fn copysign(x: c_float, y: c_float) -> c_float = cmath::c_float::copysign,
     fn cosh(n: c_float) -> c_float = cmath::c_float::cosh,
     // fn erf(n: c_float) -> c_float = cmath::c_float::erf,
     // fn erfc(n: c_float) -> c_float = cmath::c_float::erfc,
@@ -89,7 +85,6 @@ delegate!(
     fn ln_1p(n: c_float) -> c_float = cmath::c_float::ln_1p,
     // fn ilog_radix(n: c_float) -> c_int = cmath::c_float::ilog_radix,
     // fn modf(n: c_float, iptr: &mut c_float) -> c_float = cmath::c_float::modf,
-    fn round(n: c_float) -> c_float = cmath::c_float::round,
     // fn ldexp_radix(n: c_float, i: c_int) -> c_float = cmath::c_float::ldexp_radix,
     fn sinh(n: c_float) -> c_float = cmath::c_float::sinh,
     fn tan(n: c_float) -> c_float = cmath::c_float::tan,
@@ -311,6 +306,16 @@ impl Bounded for f32 {
 impl Primitive for f32 {}
 
 impl Float for f32 {
+    #[inline]
+    fn max(self, other: f32) -> f32 {
+        unsafe { cmath::c_float::fmax(self, other) }
+    }
+
+    #[inline]
+    fn min(self, other: f32) -> f32 {
+        unsafe { cmath::c_float::fmin(self, other) }
+    }
+
     #[inline]
     fn nan() -> f32 { 0.0 / 0.0 }
 
diff --git a/src/libstd/num/f64.rs b/src/libstd/num/f64.rs
index 026bd651e0e3f..d173abbcde1b3 100644
--- a/src/libstd/num/f64.rs
+++ b/src/libstd/num/f64.rs
@@ -23,8 +23,6 @@ use num::{Zero, One, Bounded, strconv};
 use num;
 use intrinsics;
 
-pub use cmp::{min, max};
-
 macro_rules! delegate(
     (
         $(
@@ -48,29 +46,25 @@ macro_rules! delegate(
 
 delegate!(
     // intrinsics
-    fn abs(n: f64) -> f64 = intrinsics::fabsf64,
+    fn sqrt(n: f64) -> f64 = intrinsics::sqrtf64,
+    fn powi(n: f64, e: i32) -> f64 = intrinsics::powif64,
+    fn sin(n: f64) -> f64 = intrinsics::sinf64,
     fn cos(n: f64) -> f64 = intrinsics::cosf64,
+    fn pow(n: f64, e: f64) -> f64 = intrinsics::powf64,
     fn exp(n: f64) -> f64 = intrinsics::expf64,
     fn exp2(n: f64) -> f64 = intrinsics::exp2f64,
-    fn floor(x: f64) -> f64 = intrinsics::floorf64,
     fn ln(n: f64) -> f64 = intrinsics::logf64,
     fn log10(n: f64) -> f64 = intrinsics::log10f64,
     fn log2(n: f64) -> f64 = intrinsics::log2f64,
     fn mul_add(a: f64, b: f64, c: f64) -> f64 = intrinsics::fmaf64,
-    fn pow(n: f64, e: f64) -> f64 = intrinsics::powf64,
-    // fn powi(n: f64, e: c_int) -> f64 = intrinsics::powif64,
-    fn sin(n: f64) -> f64 = intrinsics::sinf64,
-    fn sqrt(n: f64) -> f64 = intrinsics::sqrtf64,
-
-    // LLVM 3.3 required to use intrinsics for these four
-    fn ceil(n: c_double) -> c_double = cmath::c_double::ceil,
-    fn trunc(n: c_double) -> c_double = cmath::c_double::trunc,
-    /*
+    fn abs(n: f64) -> f64 = intrinsics::fabsf64,
+    fn copysign(x: f64, y: f64) -> f64 = intrinsics::copysignf64,
+    fn floor(x: f64) -> f64 = intrinsics::floorf64,
     fn ceil(n: f64) -> f64 = intrinsics::ceilf64,
     fn trunc(n: f64) -> f64 = intrinsics::truncf64,
-    fn rint(n: c_double) -> c_double = intrinsics::rintf64,
-    fn nearbyint(n: c_double) -> c_double = intrinsics::nearbyintf64,
-    */
+    fn rint(n: f64) -> f64 = intrinsics::rintf64,
+    fn nearbyint(n: f64) -> f64 = intrinsics::nearbyintf64,
+    fn round(n: f64) -> f64 = intrinsics::roundf64,
 
     // cmath
     fn acos(n: c_double) -> c_double = cmath::c_double::acos,
@@ -78,7 +72,6 @@ delegate!(
     fn atan(n: c_double) -> c_double = cmath::c_double::atan,
     fn atan2(a: c_double, b: c_double) -> c_double = cmath::c_double::atan2,
     fn cbrt(n: c_double) -> c_double = cmath::c_double::cbrt,
-    fn copysign(x: c_double, y: c_double) -> c_double = cmath::c_double::copysign,
     fn cosh(n: c_double) -> c_double = cmath::c_double::cosh,
     // fn erf(n: c_double) -> c_double = cmath::c_double::erf,
     // fn erfc(n: c_double) -> c_double = cmath::c_double::erfc,
@@ -92,7 +85,6 @@ delegate!(
     fn ln_1p(n: c_double) -> c_double = cmath::c_double::ln_1p,
     // fn ilog_radix(n: c_double) -> c_int = cmath::c_double::ilog_radix,
     // fn modf(n: c_double, iptr: &mut c_double) -> c_double = cmath::c_double::modf,
-    fn round(n: c_double) -> c_double = cmath::c_double::round,
     // fn ldexp_radix(n: c_double, i: c_int) -> c_double = cmath::c_double::ldexp_radix,
     fn sinh(n: c_double) -> c_double = cmath::c_double::sinh,
     fn tan(n: c_double) -> c_double = cmath::c_double::tan,
@@ -313,6 +305,16 @@ impl Bounded for f64 {
 impl Primitive for f64 {}
 
 impl Float for f64 {
+    #[inline]
+    fn max(self, other: f64) -> f64 {
+        unsafe { cmath::c_double::fmax(self, other) }
+    }
+
+    #[inline]
+    fn min(self, other: f64) -> f64 {
+        unsafe { cmath::c_double::fmin(self, other) }
+    }
+
     #[inline]
     fn nan() -> f64 { 0.0 / 0.0 }
 
diff --git a/src/libstd/num/mod.rs b/src/libstd/num/mod.rs
index 2051eeef60c79..2f377a52ef82a 100644
--- a/src/libstd/num/mod.rs
+++ b/src/libstd/num/mod.rs
@@ -313,6 +313,9 @@ pub enum FPCategory {
 pub trait Float: Signed
                + Round
                + Primitive {
+    fn max(self, other: Self) -> Self;
+    fn min(self, other: Self) -> Self;
+
     // FIXME (#5527): These should be associated constants
     fn nan() -> Self;
     fn infinity() -> Self;
diff --git a/src/libtest/lib.rs b/src/libtest/lib.rs
index 0e062003053c0..9ebd7d72c9188 100644
--- a/src/libtest/lib.rs
+++ b/src/libtest/lib.rs
@@ -1063,7 +1063,7 @@ impl MetricMap {
                 Some(v) => {
                     let delta = v.value - vold.value;
                     let noise = match noise_pct {
-                        None => f64::max(vold.noise.abs(), v.noise.abs()),
+                        None => vold.noise.abs().max(v.noise.abs()),
                         Some(pct) => vold.value * pct / 100.0
                     };
                     if delta.abs() <= noise {