rust/0002-Disable-u128-and-i128-in-libcore.patch

From 7bc14b679a5e5a43940fd47a7f3be7f1cc27509b Mon Sep 17 00:00:00 2001
From: bjorn3 <bjorn3@users.noreply.github.com>
Date: Sat, 6 Oct 2018 13:08:34 +0200
Subject: [PATCH] Disable u128 and i128 in libcore

---
 src/libcore/clone.rs         |   4 +-
 src/libcore/cmp.rs           |   6 +-
 src/libcore/default.rs       |   2 -
 src/libcore/fmt/num.rs       |   6 +-
 src/libcore/hash/mod.rs      |  20 ------
 src/libcore/iter/range.rs    |   1 -
 src/libcore/iter/traits.rs   |   2 +-
 src/libcore/lib.rs           |   2 -
 src/libcore/marker.rs        |   4 +-
 src/libcore/mem.rs           |   2 -
 src/libcore/num/mod.rs       |  99 ++++++++-------------------
 src/libcore/num/wrapping.rs  |  14 ++--
 src/libcore/ops/arith.rs     |  22 +++---
 src/libcore/ops/bit.rs       |  30 +++------
 src/libcore/tests/iter.rs    |  15 -----
 src/libcore/tests/num/mod.rs |  18 -----
 src/libcore/time.rs          | 126 -----------------------------------
 17 files changed, 62 insertions(+), 311 deletions(-)

diff --git a/src/libcore/clone.rs b/src/libcore/clone.rs
index 46bb580..fcf9fa8 100644
--- a/src/libcore/clone.rs
+++ b/src/libcore/clone.rs
@@ -172,8 +172,8 @@ mod impls {
     }
 
     impl_clone! {
-        usize u8 u16 u32 u64 u128
-        isize i8 i16 i32 i64 i128
+        usize u8 u16 u32 u64
+        isize i8 i16 i32 i64
         f32 f64
         bool char
     }
diff --git a/src/libcore/cmp.rs b/src/libcore/cmp.rs
index edaed31..570217b 100644
--- a/src/libcore/cmp.rs
+++ b/src/libcore/cmp.rs
@@ -886,7 +886,7 @@ mod impls {
     }
 
     partial_eq_impl! {
-        bool char usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64
+        bool char usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64
     }
 
     macro_rules! eq_impl {
@@ -896,7 +896,7 @@ mod impls {
         )*)
     }
 
-    eq_impl! { () bool char usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+    eq_impl! { () bool char usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
     macro_rules! partial_ord_impl {
         ($($t:ty)*) => ($(
@@ -985,7 +985,7 @@ mod impls {
         }
     }
 
-    ord_impl! { char usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+    ord_impl! { char usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
     #[unstable(feature = "never_type", issue = "35121")]
     impl PartialEq for ! {
diff --git a/src/libcore/default.rs b/src/libcore/default.rs
index ab36e29..1926719 100644
--- a/src/libcore/default.rs
+++ b/src/libcore/default.rs
@@ -145,14 +145,12 @@ default_impl! { u8, 0, "Returns the default value of `0`" }
 default_impl! { u16, 0, "Returns the default value of `0`" }
 default_impl! { u32, 0, "Returns the default value of `0`" }
 default_impl! { u64, 0, "Returns the default value of `0`" }
-default_impl! { u128, 0, "Returns the default value of `0`" }
 
 default_impl! { isize, 0, "Returns the default value of `0`" }
 default_impl! { i8, 0, "Returns the default value of `0`" }
 default_impl! { i16, 0, "Returns the default value of `0`" }
 default_impl! { i32, 0, "Returns the default value of `0`" }
 default_impl! { i64, 0, "Returns the default value of `0`" }
-default_impl! { i128, 0, "Returns the default value of `0`" }
 
 default_impl! { f32, 0.0f32, "Returns the default value of `0.0`" }
 default_impl! { f64, 0.0f64, "Returns the default value of `0.0`" }
diff --git a/src/libcore/fmt/num.rs b/src/libcore/fmt/num.rs
index 51391fa..140255e 100644
--- a/src/libcore/fmt/num.rs
+++ b/src/libcore/fmt/num.rs
@@ -29,7 +29,6 @@ trait Int: PartialEq + PartialOrd + Div<Output=Self> + Rem<Output=Self> +
     fn to_u16(&self) -> u16;
     fn to_u32(&self) -> u32;
     fn to_u64(&self) -> u64;
-    fn to_u128(&self) -> u128;
 }
 
 macro_rules! doit {
@@ -40,10 +39,9 @@ macro_rules! doit {
         fn to_u16(&self) -> u16 { *self as u16 }
         fn to_u32(&self) -> u32 { *self as u32 }
         fn to_u64(&self) -> u64 { *self as u64 }
-        fn to_u128(&self) -> u128 { *self as u128 }
     })*)
 }
-doit! { i8 i16 i32 i64 i128 isize u8 u16 u32 u64 u128 usize }
+doit! { i8 i16 i32 i64 isize u8 u16 u32 u64 usize }
 
 /// A type that represents a specific radix
 #[doc(hidden)]
@@ -184,7 +182,6 @@ integer! { i8, u8 }
 integer! { i16, u16 }
 integer! { i32, u32 }
 integer! { i64, u64 }
-integer! { i128, u128 }
 
 const DEC_DIGITS_LUT: &'static[u8] =
     b"0001020304050607080910111213141516171819\
@@ -260,7 +257,6 @@ macro_rules! impl_Display {
 
 impl_Display!(i8, u8, i16, u16, i32, u32: to_u32);
 impl_Display!(i64, u64: to_u64);
-impl_Display!(i128, u128: to_u128);
 #[cfg(target_pointer_width = "16")]
 impl_Display!(isize, usize: to_u16);
 #[cfg(target_pointer_width = "32")]
diff --git a/src/libcore/hash/mod.rs b/src/libcore/hash/mod.rs
index bbebadd..d6de656 100644
--- a/src/libcore/hash/mod.rs
+++ b/src/libcore/hash/mod.rs
@@ -306,12 +306,6 @@ pub trait Hasher {
     fn write_u64(&mut self, i: u64) {
         self.write(&unsafe { mem::transmute::<_, [u8; 8]>(i) })
     }
-    /// Writes a single `u128` into this hasher.
-    #[inline]
-    #[stable(feature = "i128", since = "1.26.0")]
-    fn write_u128(&mut self, i: u128) {
-        self.write(&unsafe { mem::transmute::<_, [u8; 16]>(i) })
-    }
     /// Writes a single `usize` into this hasher.
     #[inline]
     #[stable(feature = "hasher_write", since = "1.3.0")]
@@ -346,12 +340,6 @@ pub trait Hasher {
     fn write_i64(&mut self, i: i64) {
         self.write_u64(i as u64)
     }
-    /// Writes a single `i128` into this hasher.
-    #[inline]
-    #[stable(feature = "i128", since = "1.26.0")]
-    fn write_i128(&mut self, i: i128) {
-        self.write_u128(i as u128)
-    }
     /// Writes a single `isize` into this hasher.
     #[inline]
     #[stable(feature = "hasher_write", since = "1.3.0")]
@@ -380,9 +368,6 @@ impl<H: Hasher + ?Sized> Hasher for &mut H {
     fn write_u64(&mut self, i: u64) {
         (**self).write_u64(i)
     }
-    fn write_u128(&mut self, i: u128) {
-        (**self).write_u128(i)
-    }
     fn write_usize(&mut self, i: usize) {
         (**self).write_usize(i)
     }
@@ -398,9 +383,6 @@ impl<H: Hasher + ?Sized> Hasher for &mut H {
     fn write_i64(&mut self, i: i64) {
         (**self).write_i64(i)
     }
-    fn write_i128(&mut self, i: i128) {
-        (**self).write_i128(i)
-    }
     fn write_isize(&mut self, i: isize) {
         (**self).write_isize(i)
     }
@@ -587,8 +569,6 @@ mod impls {
         (i32, write_i32),
         (i64, write_i64),
         (isize, write_isize),
-        (u128, write_u128),
-        (i128, write_i128),
     }
 
     #[stable(feature = "rust1", since = "1.0.0")]
diff --git a/src/libcore/iter/range.rs b/src/libcore/iter/range.rs
index 55addd8..6695cfe 100644
--- a/src/libcore/iter/range.rs
+++ b/src/libcore/iter/range.rs
@@ -183,7 +183,6 @@ step_impl_signed!([i64: u64]);
 // assume here that it is less than 64-bits.
 #[cfg(not(target_pointer_width = "64"))]
 step_impl_no_between!(u64 i64);
-step_impl_no_between!(u128 i128);
 
 macro_rules! range_exact_iter_impl {
     ($($t:ty)*) => ($(
diff --git a/src/libcore/iter/traits.rs b/src/libcore/iter/traits.rs
index f95f8e7..549d832 100644
--- a/src/libcore/iter/traits.rs
+++ b/src/libcore/iter/traits.rs
@@ -843,7 +843,7 @@ macro_rules! float_sum_product {
     )*)
 }
 
-integer_sum_product! { i8 i16 i32 i64 i128 isize u8 u16 u32 u64 u128 usize }
+integer_sum_product! { i8 i16 i32 i64 isize u8 u16 u32 u64 usize }
 float_sum_product! { f32 f64 }
 
 /// An iterator adapter that produces output as long as the underlying
diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index 61181c2..5694583 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -153,14 +153,12 @@ mod uint_macros;
 #[path = "num/i16.rs"]   pub mod i16;
 #[path = "num/i32.rs"]   pub mod i32;
 #[path = "num/i64.rs"]   pub mod i64;
-#[path = "num/i128.rs"]  pub mod i128;
 
 #[path = "num/usize.rs"] pub mod usize;
 #[path = "num/u8.rs"]    pub mod u8;
 #[path = "num/u16.rs"]   pub mod u16;
 #[path = "num/u32.rs"]   pub mod u32;
 #[path = "num/u64.rs"]   pub mod u64;
-#[path = "num/u128.rs"]  pub mod u128;
 
 #[path = "num/f32.rs"]   pub mod f32;
 #[path = "num/f64.rs"]   pub mod f64;
diff --git a/src/libcore/marker.rs b/src/libcore/marker.rs
index 266c691..39feadb 100644
--- a/src/libcore/marker.rs
+++ b/src/libcore/marker.rs
@@ -672,8 +672,8 @@ mod copy_impls {
     }
 
     impl_copy! {
-        usize u8 u16 u32 u64 u128
-        isize i8 i16 i32 i64 i128
+        usize u8 u16 u32 u64
+        isize i8 i16 i32 i64
         f32 f64
         bool char
     }
diff --git a/src/libcore/mem.rs b/src/libcore/mem.rs
index 27ee955..e45a2c9 100644
--- a/src/libcore/mem.rs
+++ b/src/libcore/mem.rs
@@ -162,12 +162,10 @@ pub fn forget<T>(t: T) {
 /// u16 | 2
 /// u32 | 4
 /// u64 | 8
-/// u128 | 16
 /// i8 | 1
 /// i16 | 2
 /// i32 | 4
 /// i64 | 8
-/// i128 | 16
 /// f32 | 4
 /// f64 | 8
 /// char | 4
diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index c6473a2..c513f30 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -112,7 +112,6 @@ nonzero_integers! {
     NonZeroU16(u16);
     NonZeroU32(u32);
     NonZeroU64(u64);
-    NonZeroU128(u128);
     NonZeroUsize(usize);
 }
 
@@ -2087,18 +2086,6 @@ impl i64 {
          "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
 }
 
-#[lang = "i128"]
-impl i128 {
-    int_impl! { i128, i128, u128, 128, -170141183460469231731687303715884105728,
-        170141183460469231731687303715884105727, "", "", 16,
-        "0x13f40000000000000000000000004f76", "0x4f7613f4", "0x12345678901234567890123456789012",
-        "0x12907856341290785634129078563412", "0x48091e6a2c48091e6a2c48091e6a2c48",
-        "[0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, \
-          0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
-        "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, \
-          0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]" }
-}
-
 #[cfg(target_pointer_width = "16")]
 #[lang = "isize"]
 impl isize {
@@ -4339,17 +4326,6 @@ impl u64 {
         "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]" }
 }
 
-#[lang = "u128"]
-impl u128 {
-    uint_impl! { u128, u128, 128, 340282366920938463463374607431768211455, "", "", 16,
-        "0x13f40000000000000000000000004f76", "0x4f7613f4", "0x12345678901234567890123456789012",
-        "0x12907856341290785634129078563412", "0x48091e6a2c48091e6a2c48091e6a2c48",
-        "[0x12, 0x90, 0x78, 0x56, 0x34, 0x12, 0x90, 0x78, \
-          0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]",
-        "[0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56, \
-          0x78, 0x90, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12]" }
-}
-
 #[cfg(target_pointer_width = "16")]
 #[lang = "usize"]
 impl usize {
@@ -4433,7 +4409,7 @@ macro_rules! from_str_radix_int_impl {
         }
     )*}
 }
-from_str_radix_int_impl! { isize i8 i16 i32 i64 i128 usize u8 u16 u32 u64 u128 }
+from_str_radix_int_impl! { isize i8 i16 i32 i64 usize u8 u16 u32 u64 }
 
 /// The error type returned when a checked integral type conversion fails.
 #[unstable(feature = "try_from", issue = "33417")]
@@ -4549,30 +4525,25 @@ macro_rules! rev {
 try_from_upper_bounded!(u16, u8);
 try_from_upper_bounded!(u32, u16, u8);
 try_from_upper_bounded!(u64, u32, u16, u8);
-try_from_upper_bounded!(u128, u64, u32, u16, u8);
 
 try_from_both_bounded!(i16, i8);
 try_from_both_bounded!(i32, i16, i8);
 try_from_both_bounded!(i64, i32, i16, i8);
-try_from_both_bounded!(i128, i64, i32, i16, i8);
 
 // unsigned-to-signed
 try_from_upper_bounded!(u8, i8);
 try_from_upper_bounded!(u16, i8, i16);
 try_from_upper_bounded!(u32, i8, i16, i32);
 try_from_upper_bounded!(u64, i8, i16, i32, i64);
-try_from_upper_bounded!(u128, i8, i16, i32, i64, i128);
 
 // signed-to-unsigned
-try_from_lower_bounded!(i8, u8, u16, u32, u64, u128);
-try_from_lower_bounded!(i16, u16, u32, u64, u128);
-try_from_lower_bounded!(i32, u32, u64, u128);
-try_from_lower_bounded!(i64, u64, u128);
-try_from_lower_bounded!(i128, u128);
+try_from_lower_bounded!(i8, u8, u16, u32, u64);
+try_from_lower_bounded!(i16, u16, u32, u64);
+try_from_lower_bounded!(i32, u32, u64);
+try_from_lower_bounded!(i64, u64);
 try_from_both_bounded!(i16, u8);
 try_from_both_bounded!(i32, u16, u8);
 try_from_both_bounded!(i64, u32, u16, u8);
-try_from_both_bounded!(i128, u64, u32, u16, u8);
 
 // usize/isize
 try_from_upper_bounded!(usize, isize);
@@ -4584,21 +4555,21 @@ mod ptr_try_from_impls {
     use convert::TryFrom;
 
     try_from_upper_bounded!(usize, u8);
-    try_from_unbounded!(usize, u16, u32, u64, u128);
+    try_from_unbounded!(usize, u16, u32, u64);
     try_from_upper_bounded!(usize, i8, i16);
-    try_from_unbounded!(usize, i32, i64, i128);
+    try_from_unbounded!(usize, i32, i64);
 
     try_from_both_bounded!(isize, u8);
-    try_from_lower_bounded!(isize, u16, u32, u64, u128);
+    try_from_lower_bounded!(isize, u16, u32, u64);
     try_from_both_bounded!(isize, i8);
-    try_from_unbounded!(isize, i16, i32, i64, i128);
+    try_from_unbounded!(isize, i16, i32, i64);
 
-    rev!(try_from_upper_bounded, usize, u32, u64, u128);
+    rev!(try_from_upper_bounded, usize, u32, u64);
     rev!(try_from_lower_bounded, usize, i8, i16);
-    rev!(try_from_both_bounded, usize, i32, i64, i128);
+    rev!(try_from_both_bounded, usize, i32, i64);
 
-    rev!(try_from_upper_bounded, isize, u16, u32, u64, u128);
-    rev!(try_from_both_bounded, isize, i32, i64, i128);
+    rev!(try_from_upper_bounded, isize, u16, u32, u64);
+    rev!(try_from_both_bounded, isize, i32, i64);
 }
 
 #[cfg(target_pointer_width = "32")]
@@ -4607,24 +4578,24 @@ mod ptr_try_from_impls {
     use convert::TryFrom;
 
     try_from_upper_bounded!(usize, u8, u16);
-    try_from_unbounded!(usize, u32, u64, u128);
+    try_from_unbounded!(usize, u32, u64);
     try_from_upper_bounded!(usize, i8, i16, i32);
-    try_from_unbounded!(usize, i64, i128);
+    try_from_unbounded!(usize, i64);
 
     try_from_both_bounded!(isize, u8, u16);
-    try_from_lower_bounded!(isize, u32, u64, u128);
+    try_from_lower_bounded!(isize, u32, u64);
     try_from_both_bounded!(isize, i8, i16);
-    try_from_unbounded!(isize, i32, i64, i128);
+    try_from_unbounded!(isize, i32, i64);
 
     rev!(try_from_unbounded, usize, u32);
-    rev!(try_from_upper_bounded, usize, u64, u128);
+    rev!(try_from_upper_bounded, usize, u64);
     rev!(try_from_lower_bounded, usize, i8, i16, i32);
-    rev!(try_from_both_bounded, usize, i64, i128);
+    rev!(try_from_both_bounded, usize, i64);
 
     rev!(try_from_unbounded, isize, u16);
-    rev!(try_from_upper_bounded, isize, u32, u64, u128);
+    rev!(try_from_upper_bounded, isize, u32, u64);
     rev!(try_from_unbounded, isize, i32);
-    rev!(try_from_both_bounded, isize, i64, i128);
+    rev!(try_from_both_bounded, isize, i64);
 }
 
 #[cfg(target_pointer_width = "64")]
@@ -4633,24 +4604,20 @@ mod ptr_try_from_impls {
     use convert::TryFrom;
 
     try_from_upper_bounded!(usize, u8, u16, u32);
-    try_from_unbounded!(usize, u64, u128);
+    try_from_unbounded!(usize, u64);
     try_from_upper_bounded!(usize, i8, i16, i32, i64);
-    try_from_unbounded!(usize, i128);
 
     try_from_both_bounded!(isize, u8, u16, u32);
-    try_from_lower_bounded!(isize, u64, u128);
+    try_from_lower_bounded!(isize, u64);
     try_from_both_bounded!(isize, i8, i16, i32);
-    try_from_unbounded!(isize, i64, i128);
+    try_from_unbounded!(isize, i64);
 
     rev!(try_from_unbounded, usize, u32, u64);
-    rev!(try_from_upper_bounded, usize, u128);
     rev!(try_from_lower_bounded, usize, i8, i16, i32, i64);
-    rev!(try_from_both_bounded, usize, i128);
 
     rev!(try_from_unbounded, isize, u16, u32);
-    rev!(try_from_upper_bounded, isize, u64, u128);
+    rev!(try_from_upper_bounded, isize, u64);
     rev!(try_from_unbounded, isize, i32, i64);
-    rev!(try_from_both_bounded, isize, i128);
 }
 
 #[doc(hidden)]
@@ -4685,7 +4652,7 @@ macro_rules! doit {
         }
     })*)
 }
-doit! { i8 i16 i32 i64 i128 isize u8 u16 u32 u64 u128 usize }
+doit! { i8 i16 i32 i64 isize u8 u16 u32 u64 usize }
 
 fn from_str_radix<T: FromStrRadixHelper>(src: &str, radix: u32) -> Result<T, ParseIntError> {
     use self::IntErrorKind::*;
@@ -4853,52 +4820,38 @@ impl_from_bool! { u8, #[stable(feature = "from_bool", since = "1.28.0")] }
 impl_from_bool! { u16, #[stable(feature = "from_bool", since = "1.28.0")] }
 impl_from_bool! { u32, #[stable(feature = "from_bool", since = "1.28.0")] }
 impl_from_bool! { u64, #[stable(feature = "from_bool", since = "1.28.0")] }
-impl_from_bool! { u128, #[stable(feature = "from_bool", since = "1.28.0")] }
 impl_from_bool! { usize, #[stable(feature = "from_bool", since = "1.28.0")] }
 impl_from_bool! { i8, #[stable(feature = "from_bool", since = "1.28.0")] }
 impl_from_bool! { i16, #[stable(feature = "from_bool", since = "1.28.0")] }
 impl_from_bool! { i32, #[stable(feature = "from_bool", since = "1.28.0")] }
 impl_from_bool! { i64, #[stable(feature = "from_bool", since = "1.28.0")] }
-impl_from_bool! { i128, #[stable(feature = "from_bool", since = "1.28.0")] }
 impl_from_bool! { isize, #[stable(feature = "from_bool", since = "1.28.0")] }
 
 // Unsigned -> Unsigned
 impl_from! { u8, u16, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { u8, u32, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { u8, u64, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
-impl_from! { u8, u128, #[stable(feature = "i128", since = "1.26.0")] }
 impl_from! { u8, usize, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { u16, u32, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { u16, u64, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
-impl_from! { u16, u128, #[stable(feature = "i128", since = "1.26.0")] }
 impl_from! { u32, u64, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
-impl_from! { u32, u128, #[stable(feature = "i128", since = "1.26.0")] }
-impl_from! { u64, u128, #[stable(feature = "i128", since = "1.26.0")] }
 
 // Signed -> Signed
 impl_from! { i8, i16, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { i8, i32, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { i8, i64, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
-impl_from! { i8, i128, #[stable(feature = "i128", since = "1.26.0")] }
 impl_from! { i8, isize, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { i16, i32, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { i16, i64, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
-impl_from! { i16, i128, #[stable(feature = "i128", since = "1.26.0")] }
 impl_from! { i32, i64, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
-impl_from! { i32, i128, #[stable(feature = "i128", since = "1.26.0")] }
-impl_from! { i64, i128, #[stable(feature = "i128", since = "1.26.0")] }
 
 // Unsigned -> Signed
 impl_from! { u8, i16, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { u8, i32, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { u8, i64, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
-impl_from! { u8, i128, #[stable(feature = "i128", since = "1.26.0")] }
 impl_from! { u16, i32, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
 impl_from! { u16, i64, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
-impl_from! { u16, i128, #[stable(feature = "i128", since = "1.26.0")] }
 impl_from! { u32, i64, #[stable(feature = "lossless_int_conv", since = "1.5.0")] }
-impl_from! { u32, i128, #[stable(feature = "i128", since = "1.26.0")] }
-impl_from! { u64, i128, #[stable(feature = "i128", since = "1.26.0")] }
 
 // The C99 standard defines bounds on INTPTR_MIN, INTPTR_MAX, and UINTPTR_MAX
 // which imply that pointer-sized integers must be at least 16 bits:
diff --git a/src/libcore/num/wrapping.rs b/src/libcore/num/wrapping.rs
index 1c826c2..0779e31 100644
--- a/src/libcore/num/wrapping.rs
+++ b/src/libcore/num/wrapping.rs
@@ -112,19 +112,17 @@ macro_rules! sh_impl_all {
         //sh_impl_unsigned! { $t, u16 }
         //sh_impl_unsigned! { $t, u32 }
         //sh_impl_unsigned! { $t, u64 }
-        //sh_impl_unsigned! { $t, u128 }
         sh_impl_unsigned! { $t, usize }
 
         //sh_impl_signed! { $t, i8 }
         //sh_impl_signed! { $t, i16 }
         //sh_impl_signed! { $t, i32 }
         //sh_impl_signed! { $t, i64 }
-        //sh_impl_signed! { $t, i128 }
         //sh_impl_signed! { $t, isize }
     )*)
 }
 
-sh_impl_all! { u8 u16 u32 u64 u128 usize i8 i16 i32 i64 i128 isize }
+sh_impl_all! { u8 u16 u32 u64 usize i8 i16 i32 i64 isize }
 
 // FIXME(30524): impl Op<T> for Wrapping<T>, impl OpAssign<T> for Wrapping<T>
 macro_rules! wrapping_impl {
@@ -323,7 +321,7 @@ macro_rules! wrapping_impl {
     )*)
 }
 
-wrapping_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+wrapping_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 macro_rules! wrapping_int_impl {
     ($($t:ty)*) => ($(
@@ -685,7 +683,7 @@ assert_eq!(Wrapping(3i8).pow(6), Wrapping(-39));
     )*)
 }
 
-wrapping_int_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+wrapping_int_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 macro_rules! wrapping_int_impl_signed {
     ($($t:ty)*) => ($(
@@ -814,7 +812,7 @@ assert!(!Wrapping(10", stringify!($t), ").is_negative());
     )*)
 }
 
-wrapping_int_impl_signed! { isize i8 i16 i32 i64 i128 }
+wrapping_int_impl_signed! { isize i8 i16 i32 i64 }
 
 macro_rules! wrapping_int_impl_unsigned {
     ($($t:ty)*) => ($(
@@ -891,7 +889,7 @@ assert_eq!(Wrapping(200_u8).next_power_of_two(), Wrapping(0));
     )*)
 }
 
-wrapping_int_impl_unsigned! { usize u8 u16 u32 u64 u128 }
+wrapping_int_impl_unsigned! { usize u8 u16 u32 u64 }
 
 mod shift_max {
     #![allow(non_upper_case_globals)]
@@ -918,13 +916,11 @@ mod shift_max {
     pub const i16: u32 = (1 << 4) - 1;
     pub const i32: u32 = (1 << 5) - 1;
     pub const i64: u32 = (1 << 6) - 1;
-    pub const i128: u32 = (1 << 7) - 1;
     pub use self::platform::isize;
 
     pub const u8: u32 = i8;
     pub const u16: u32 = i16;
     pub const u32: u32 = i32;
     pub const u64: u32 = i64;
-    pub const u128: u32 = i128;
     pub use self::platform::usize;
 }
diff --git a/src/libcore/ops/arith.rs b/src/libcore/ops/arith.rs
index a1bc546..38742be 100644
--- a/src/libcore/ops/arith.rs
+++ b/src/libcore/ops/arith.rs
@@ -114,7 +114,7 @@ macro_rules! add_impl {
     )*)
 }
 
-add_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }
+add_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
 
 /// The subtraction operator `-`.
 ///
@@ -212,7 +212,7 @@ macro_rules! sub_impl {
     )*)
 }
 
-sub_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }
+sub_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
 
 /// The multiplication operator `*`.
 ///
@@ -332,7 +332,7 @@ macro_rules! mul_impl {
     )*)
 }
 
-mul_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }
+mul_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
 
 /// The division operator `/`.
 ///
@@ -457,7 +457,7 @@ macro_rules! div_impl_integer {
     )*)
 }
 
-div_impl_integer! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+div_impl_integer! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 macro_rules! div_impl_float {
     ($($t:ty)*) => ($(
@@ -542,7 +542,7 @@ macro_rules! rem_impl_integer {
     )*)
 }
 
-rem_impl_integer! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+rem_impl_integer! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 
 macro_rules! rem_impl_float {
@@ -641,7 +641,7 @@ macro_rules! neg_impl_unsigned {
 }
 
 // neg_impl_unsigned! { usize u8 u16 u32 u64 }
-neg_impl_numeric! { isize i8 i16 i32 i64 i128 f32 f64 }
+neg_impl_numeric! { isize i8 i16 i32 i64 f32 f64 }
 
 /// The addition assignment operator `+=`.
 ///
@@ -697,7 +697,7 @@ macro_rules! add_assign_impl {
     )+)
 }
 
-add_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }
+add_assign_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
 
 /// The subtraction assignment operator `-=`.
 ///
@@ -753,7 +753,7 @@ macro_rules! sub_assign_impl {
     )+)
 }
 
-sub_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }
+sub_assign_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
 
 /// The multiplication assignment operator `*=`.
 ///
@@ -800,7 +800,7 @@ macro_rules! mul_assign_impl {
     )+)
 }
 
-mul_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }
+mul_assign_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
 
 /// The division assignment operator `/=`.
 ///
@@ -846,7 +846,7 @@ macro_rules! div_assign_impl {
     )+)
 }
 
-div_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }
+div_assign_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
 
 /// The remainder assignment operator `%=`.
 ///
@@ -896,4 +896,4 @@ macro_rules! rem_assign_impl {
     )+)
 }
 
-rem_assign_impl! { usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 f32 f64 }
+rem_assign_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 }
diff --git a/src/libcore/ops/bit.rs b/src/libcore/ops/bit.rs
index 3900f36..66b7980 100644
--- a/src/libcore/ops/bit.rs
+++ b/src/libcore/ops/bit.rs
@@ -65,7 +65,7 @@ macro_rules! not_impl {
     )*)
 }
 
-not_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+not_impl! { bool usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 /// The bitwise AND operator `&`.
 ///
@@ -149,7 +149,7 @@ macro_rules! bitand_impl {
     )*)
 }
 
-bitand_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+bitand_impl! { bool usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 /// The bitwise OR operator `|`.
 ///
@@ -233,7 +233,7 @@ macro_rules! bitor_impl {
     )*)
 }
 
-bitor_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+bitor_impl! { bool usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 /// The bitwise XOR operator `^`.
 ///
@@ -320,7 +320,7 @@ macro_rules! bitxor_impl {
     )*)
 }
 
-bitxor_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+bitxor_impl! { bool usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 /// The left shift operator `<<`. Note that because this trait is implemented
 /// for all integer types with multiple right-hand-side types, Rust's type
@@ -417,19 +417,17 @@ macro_rules! shl_impl_all {
         shl_impl! { $t, u16 }
         shl_impl! { $t, u32 }
         shl_impl! { $t, u64 }
-        shl_impl! { $t, u128 }
         shl_impl! { $t, usize }
 
         shl_impl! { $t, i8 }
         shl_impl! { $t, i16 }
         shl_impl! { $t, i32 }
         shl_impl! { $t, i64 }
-        shl_impl! { $t, i128 }
         shl_impl! { $t, isize }
     )*)
 }
 
-shl_impl_all! { u8 u16 u32 u64 u128 usize i8 i16 i32 i64 isize i128 }
+shl_impl_all! { u8 u16 u32 u64 usize i8 i16 i32 i64 isize }
 
 /// The right shift operator `>>`. Note that because this trait is implemented
 /// for all integer types with multiple right-hand-side types, Rust's type
@@ -526,19 +524,17 @@ macro_rules! shr_impl_all {
         shr_impl! { $t, u16 }
         shr_impl! { $t, u32 }
         shr_impl! { $t, u64 }
-        shr_impl! { $t, u128 }
         shr_impl! { $t, usize }
 
         shr_impl! { $t, i8 }
         shr_impl! { $t, i16 }
         shr_impl! { $t, i32 }
         shr_impl! { $t, i64 }
-        shr_impl! { $t, i128 }
         shr_impl! { $t, isize }
     )*)
 }
 
-shr_impl_all! { u8 u16 u32 u64 u128 usize i8 i16 i32 i64 i128 isize }
+shr_impl_all! { u8 u16 u32 u64 usize i8 i16 i32 i64 isize }
 
 /// The bitwise AND assignment operator `&=`.
 ///
@@ -626,7 +622,7 @@ macro_rules! bitand_assign_impl {
     )+)
 }
 
-bitand_assign_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+bitand_assign_impl! { bool usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 /// The bitwise OR assignment operator `|=`.
 ///
@@ -675,7 +671,7 @@ macro_rules! bitor_assign_impl {
     )+)
 }
 
-bitor_assign_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+bitor_assign_impl! { bool usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 /// The bitwise XOR assignment operator `^=`.
 ///
@@ -724,7 +720,7 @@ macro_rules! bitxor_assign_impl {
     )+)
 }
 
-bitxor_assign_impl! { bool usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
+bitxor_assign_impl! { bool usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
 /// The left shift assignment operator `<<=`.
 ///
@@ -780,19 +776,17 @@ macro_rules! shl_assign_impl_all {
         shl_assign_impl! { $t, u16 }
         shl_assign_impl! { $t, u32 }
         shl_assign_impl! { $t, u64 }
-        shl_assign_impl! { $t, u128 }
         shl_assign_impl! { $t, usize }
 
         shl_assign_impl! { $t, i8 }
         shl_assign_impl! { $t, i16 }
         shl_assign_impl! { $t, i32 }
         shl_assign_impl! { $t, i64 }
-        shl_assign_impl! { $t, i128 }
         shl_assign_impl! { $t, isize }
     )*)
 }
 
-shl_assign_impl_all! { u8 u16 u32 u64 u128 usize i8 i16 i32 i64 i128 isize }
+shl_assign_impl_all! { u8 u16 u32 u64 usize i8 i16 i32 i64 isize }
 
 /// The right shift assignment operator `>>=`.
 ///
@@ -848,16 +842,14 @@ macro_rules! shr_assign_impl_all {
         shr_assign_impl! { $t, u16 }
         shr_assign_impl! { $t, u32 }
         shr_assign_impl! { $t, u64 }
-        shr_assign_impl! { $t, u128 }
         shr_assign_impl! { $t, usize }
 
         shr_assign_impl! { $t, i8 }
         shr_assign_impl! { $t, i16 }
         shr_assign_impl! { $t, i32 }
         shr_assign_impl! { $t, i64 }
-        shr_assign_impl! { $t, i128 }
         shr_assign_impl! { $t, isize }
     )*)
 }
 
-shr_assign_impl_all! { u8 u16 u32 u64 u128 usize i8 i16 i32 i64 i128 isize }
+shr_assign_impl_all! { u8 u16 u32 u64 usize i8 i16 i32 i64 isize }
diff --git a/src/libcore/tests/iter.rs b/src/libcore/tests/iter.rs
index 2476c07..2075670 100644
--- a/src/libcore/tests/iter.rs
+++ b/src/libcore/tests/iter.rs
@@ -224,8 +224,6 @@ fn test_iterator_step_by_nth_overflow() {
     type Bigger = u32;
     #[cfg(target_pointer_width = "32")]
     type Bigger = u64;
-    #[cfg(target_pointer_width = "64")]
-    type Bigger = u128;
 
     #[derive(Clone)]
     struct Test(Bigger);
@@ -1877,19 +1875,6 @@ fn test_step_replace_signed() {
     assert_eq!(y, 5);
 }
 
-#[test]
-fn test_step_replace_no_between() {
-    let mut x = 4u128;
-    let y = x.replace_zero();
-    assert_eq!(x, 0);
-    assert_eq!(y, 4);
-
-    x = 5;
-    let y = x.replace_one();
-    assert_eq!(x, 1);
-    assert_eq!(y, 5);
-}
-
 #[test]
 fn test_rev_try_folds() {
     let f = &|acc, x| i32::checked_add(2*acc, x);
diff --git a/src/libcore/tests/num/mod.rs b/src/libcore/tests/num/mod.rs
index ab96d31..bb5c1d0 100644
--- a/src/libcore/tests/num/mod.rs
+++ b/src/libcore/tests/num/mod.rs
@@ -196,12 +196,10 @@ test_impl_from! { test_boolu8, bool, u8 }
 test_impl_from! { test_boolu16, bool, u16 }
 test_impl_from! { test_boolu32, bool, u32 }
 test_impl_from! { test_boolu64, bool, u64 }
-test_impl_from! { test_boolu128, bool, u128 }
 test_impl_from! { test_booli8, bool, i8 }
 test_impl_from! { test_booli16, bool, i16 }
 test_impl_from! { test_booli32, bool, i32 }
 test_impl_from! { test_booli64, bool, i64 }
-test_impl_from! { test_booli128, bool, i128 }
 
 // Signed -> Float
 test_impl_from! { test_i8f32, i8, f32 }
@@ -283,51 +281,35 @@ test_impl_try_from_always_ok! { test_try_u8u8, u8, u8 }
 test_impl_try_from_always_ok! { test_try_u8u16, u8, u16 }
 test_impl_try_from_always_ok! { test_try_u8u32, u8, u32 }
 test_impl_try_from_always_ok! { test_try_u8u64, u8, u64 }
-test_impl_try_from_always_ok! { test_try_u8u128, u8, u128 }
 test_impl_try_from_always_ok! { test_try_u8i16, u8, i16 }
 test_impl_try_from_always_ok! { test_try_u8i32, u8, i32 }
 test_impl_try_from_always_ok! { test_try_u8i64, u8, i64 }
-test_impl_try_from_always_ok! { test_try_u8i128, u8, i128 }
 
 test_impl_try_from_always_ok! { test_try_u16u16, u16, u16 }
 test_impl_try_from_always_ok! { test_try_u16u32, u16, u32 }
 test_impl_try_from_always_ok! { test_try_u16u64, u16, u64 }
-test_impl_try_from_always_ok! { test_try_u16u128, u16, u128 }
 test_impl_try_from_always_ok! { test_try_u16i32, u16, i32 }
 test_impl_try_from_always_ok! { test_try_u16i64, u16, i64 }
-test_impl_try_from_always_ok! { test_try_u16i128, u16, i128 }
 
 test_impl_try_from_always_ok! { test_try_u32u32, u32, u32 }
 test_impl_try_from_always_ok! { test_try_u32u64, u32, u64 }
-test_impl_try_from_always_ok! { test_try_u32u128, u32, u128 }
 test_impl_try_from_always_ok! { test_try_u32i64, u32, i64 }
-test_impl_try_from_always_ok! { test_try_u32i128, u32, i128 }
 
 test_impl_try_from_always_ok! { test_try_u64u64, u64, u64 }
-test_impl_try_from_always_ok! { test_try_u64u128, u64, u128 }
-test_impl_try_from_always_ok! { test_try_u64i128, u64, i128 }
-
-test_impl_try_from_always_ok! { test_try_u128u128, u128, u128 }
 
 test_impl_try_from_always_ok! { test_try_i8i8, i8, i8 }
 test_impl_try_from_always_ok! { test_try_i8i16, i8, i16 }
 test_impl_try_from_always_ok! { test_try_i8i32, i8, i32 }
 test_impl_try_from_always_ok! { test_try_i8i64, i8, i64 }
-test_impl_try_from_always_ok! { test_try_i8i128, i8, i128 }
 
 test_impl_try_from_always_ok! { test_try_i16i16, i16, i16 }
 test_impl_try_from_always_ok! { test_try_i16i32, i16, i32 }
 test_impl_try_from_always_ok! { test_try_i16i64, i16, i64 }
-test_impl_try_from_always_ok! { test_try_i16i128, i16, i128 }
 
 test_impl_try_from_always_ok! { test_try_i32i32, i32, i32 }
 test_impl_try_from_always_ok! { test_try_i32i64, i32, i64 }
-test_impl_try_from_always_ok! { test_try_i32i128, i32, i128 }
 
 test_impl_try_from_always_ok! { test_try_i64i64, i64, i64 }
-test_impl_try_from_always_ok! { test_try_i64i128, i64, i128 }
-
-test_impl_try_from_always_ok! { test_try_i128i128, i128, i128 }
 
 test_impl_try_from_always_ok! { test_try_usizeusize, usize, usize }
 test_impl_try_from_always_ok! { test_try_isizeisize, isize, isize }
diff --git a/src/libcore/time.rs b/src/libcore/time.rs
index 81ae8ad..0e3dd39 100644
--- a/src/libcore/time.rs
+++ b/src/libcore/time.rs
@@ -30,7 +30,6 @@ const NANOS_PER_MILLI: u32 = 1_000_000;
 const NANOS_PER_MICRO: u32 = 1_000;
 const MILLIS_PER_SEC: u64 = 1_000;
 const MICROS_PER_SEC: u64 = 1_000_000;
-const MAX_NANOS_F64: f64 = ((u64::MAX as u128 + 1)*(NANOS_PER_SEC as u128)) as f64;
 
 /// A `Duration` type to represent a span of time, typically used for system
 /// timeouts.
@@ -273,57 +272,6 @@ impl Duration {
     #[inline]
     pub const fn subsec_nanos(&self) -> u32 { self.nanos }
 
-    /// Returns the total number of whole milliseconds contained by this `Duration`.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// # #![feature(duration_as_u128)]
-    /// use std::time::Duration;
-    ///
-    /// let duration = Duration::new(5, 730023852);
-    /// assert_eq!(duration.as_millis(), 5730);
-    /// ```
-    #[unstable(feature = "duration_as_u128", issue = "50202")]
-    #[inline]
-    pub fn as_millis(&self) -> u128 {
-        self.secs as u128 * MILLIS_PER_SEC as u128 + (self.nanos / NANOS_PER_MILLI) as u128
-    }
-
-    /// Returns the total number of whole microseconds contained by this `Duration`.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// # #![feature(duration_as_u128)]
-    /// use std::time::Duration;
-    ///
-    /// let duration = Duration::new(5, 730023852);
-    /// assert_eq!(duration.as_micros(), 5730023);
-    /// ```
-    #[unstable(feature = "duration_as_u128", issue = "50202")]
-    #[inline]
-    pub fn as_micros(&self) -> u128 {
-        self.secs as u128 * MICROS_PER_SEC as u128 + (self.nanos / NANOS_PER_MICRO) as u128
-    }
-
-    /// Returns the total number of nanoseconds contained by this `Duration`.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// # #![feature(duration_as_u128)]
-    /// use std::time::Duration;
-    ///
-    /// let duration = Duration::new(5, 730023852);
-    /// assert_eq!(duration.as_nanos(), 5730023852);
-    /// ```
-    #[unstable(feature = "duration_as_u128", issue = "50202")]
-    #[inline]
-    pub fn as_nanos(&self) -> u128 {
-        self.secs as u128 * NANOS_PER_SEC as u128 + self.nanos as u128
-    }
-
     /// Checked `Duration` addition. Computes `self + other`, returning [`None`]
     /// if overflow occurred.
     ///
@@ -482,80 +430,6 @@ impl Duration {
         (self.secs as f64) + (self.nanos as f64) / (NANOS_PER_SEC as f64)
     }
 
-    /// Creates a new `Duration` from the specified number of seconds.
-    ///
-    /// # Panics
-    /// This constructor will panic if `secs` is not finite, negative or overflows `Duration`.
-    ///
-    /// # Examples
-    /// ```
-    /// #![feature(duration_float)]
-    /// use std::time::Duration;
-    ///
-    /// let dur = Duration::from_float_secs(2.7);
-    /// assert_eq!(dur, Duration::new(2, 700_000_000));
-    /// ```
-    #[unstable(feature = "duration_float", issue = "54361")]
-    #[inline]
-    pub fn from_float_secs(secs: f64) -> Duration {
-        let nanos =  secs * (NANOS_PER_SEC as f64);
-        if !nanos.is_finite() {
-            panic!("got non-finite value when converting float to duration");
-        }
-        if nanos >= MAX_NANOS_F64 {
-            panic!("overflow when converting float to duration");
-        }
-        if nanos < 0.0 {
-            panic!("underflow when converting float to duration");
-        }
-        let nanos =  nanos as u128;
-        Duration {
-            secs: (nanos / (NANOS_PER_SEC as u128)) as u64,
-            nanos: (nanos % (NANOS_PER_SEC as u128)) as u32,
-        }
-    }
-
-    /// Multiply `Duration` by `f64`.
-    ///
-    /// # Panics
-    /// This method will panic if result is not finite, negative or overflows `Duration`.
-    ///
-    /// # Examples
-    /// ```
-    /// #![feature(duration_float)]
-    /// use std::time::Duration;
-    ///
-    /// let dur = Duration::new(2, 700_000_000);
-    /// assert_eq!(dur.mul_f64(3.14), Duration::new(8, 478_000_000));
-    /// assert_eq!(dur.mul_f64(3.14e5), Duration::new(847_800, 0));
-    /// ```
-    #[unstable(feature = "duration_float", issue = "54361")]
-    #[inline]
-    pub fn mul_f64(self, rhs: f64) -> Duration {
-        Duration::from_float_secs(rhs * self.as_float_secs())
-    }
-
-    /// Divide `Duration` by `f64`.
-    ///
-    /// # Panics
-    /// This method will panic if result is not finite, negative or overflows `Duration`.
-    ///
-    /// # Examples
-    /// ```
-    /// #![feature(duration_float)]
-    /// use std::time::Duration;
-    ///
-    /// let dur = Duration::new(2, 700_000_000);
-    /// assert_eq!(dur.div_f64(3.14), Duration::new(0, 859_872_611));
-    /// // note that truncation is used, not rounding
-    /// assert_eq!(dur.div_f64(3.14e5), Duration::new(0, 8_598));
-    /// ```
-    #[unstable(feature = "duration_float", issue = "54361")]
-    #[inline]
-    pub fn div_f64(self, rhs: f64) -> Duration {
-        Duration::from_float_secs(self.as_float_secs() / rhs)
-    }
-
     /// Divide `Duration` by `Duration` and return `f64`.
     ///
     /// # Examples
-- 
2.17.1 (Apple Git-112)