diff --git a/src/libnative/io/net.rs b/src/libnative/io/net.rs
index 9042353c50a..ec6a5c5cb9b 100644
--- a/src/libnative/io/net.rs
+++ b/src/libnative/io/net.rs
@@ -15,7 +15,6 @@ use std::libc;
 use std::mem;
 use std::rt::rtio;
 use std::sync::arc::UnsafeArc;
-use std::unstable::intrinsics;
 
 use super::{IoResult, retry};
 use super::file::keep_going;
@@ -28,10 +27,10 @@ use super::file::keep_going;
 #[cfg(unix)]    pub type sock_t = super::file::fd_t;
 
 pub fn htons(u: u16) -> u16 {
-    intrinsics::to_be16(u as i16) as u16
+    mem::to_be16(u as i16) as u16
 }
 pub fn ntohs(u: u16) -> u16 {
-    intrinsics::from_be16(u as i16) as u16
+    mem::from_be16(u as i16) as u16
 }
 
 enum InAddr {
diff --git a/src/librustc/util/sha2.rs b/src/librustc/util/sha2.rs
index 5fbf57c5060..1b3f5ec947d 100644
--- a/src/librustc/util/sha2.rs
+++ b/src/librustc/util/sha2.rs
@@ -22,7 +22,7 @@ use extra::hex::ToHex;
 /// format.
 fn write_u32_be(dst: &mut[u8], input: u32) {
     use std::cast::transmute;
-    use std::unstable::intrinsics::to_be32;
+    use std::mem::to_be32;
     assert!(dst.len() == 4);
     unsafe {
         let x: *mut i32 = transmute(dst.unsafe_mut_ref(0));
@@ -33,7 +33,7 @@ fn write_u32_be(dst: &mut[u8], input: u32) {
 /// Read a vector of bytes into a vector of u32s. The values are read in big-endian format.
 fn read_u32v_be(dst: &mut[u32], input: &[u8]) {
     use std::cast::transmute;
-    use std::unstable::intrinsics::to_be32;
+    use std::mem::to_be32;
     assert!(dst.len() * 4 == input.len());
     unsafe {
         let mut x: *mut i32 = transmute(dst.unsafe_mut_ref(0));
diff --git a/src/librustuv/net.rs b/src/librustuv/net.rs
index 9ccef383efa..87fadbba176 100644
--- a/src/librustuv/net.rs
+++ b/src/librustuv/net.rs
@@ -17,7 +17,6 @@ use std::mem;
 use std::ptr;
 use std::rt::rtio;
 use std::rt::task::BlockedTask;
-use std::unstable::intrinsics;
 
 use access::Access;
 use homing::{HomingIO, HomeHandle};
@@ -33,8 +32,8 @@ use uvll;
 /// Generic functions related to dealing with sockaddr things
 ////////////////////////////////////////////////////////////////////////////////
 
-pub fn htons(u: u16) -> u16 { intrinsics::to_be16(u as i16) as u16 }
-pub fn ntohs(u: u16) -> u16 { intrinsics::from_be16(u as i16) as u16 }
+pub fn htons(u: u16) -> u16 { mem::to_be16(u as i16) as u16 }
+pub fn ntohs(u: u16) -> u16 { mem::from_be16(u as i16) as u16 }
 
 pub fn sockaddr_to_addr(storage: &libc::sockaddr_storage,
                         len: uint) -> ip::SocketAddr {
diff --git a/src/libserialize/ebml.rs b/src/libserialize/ebml.rs
index 9d1c099c6f0..f08f943306f 100644
--- a/src/libserialize/ebml.rs
+++ b/src/libserialize/ebml.rs
@@ -132,7 +132,7 @@ pub mod reader {
 
     pub fn vuint_at(data: &[u8], start: uint) -> Res {
         use std::ptr::offset;
-        use std::unstable::intrinsics::from_be32;
+        use std::mem::from_be32;
 
         if data.len() - start < 4 {
             return vuint_at_slow(data, start);
diff --git a/src/libstd/io/extensions.rs b/src/libstd/io/extensions.rs
index 49d51cbb26f..240f4c65501 100644
--- a/src/libstd/io/extensions.rs
+++ b/src/libstd/io/extensions.rs
@@ -51,7 +51,7 @@ impl<'r, R: Reader> Iterator<u8> for Bytes<'r, R> {
 }
 
 pub fn u64_to_le_bytes<T>(n: u64, size: uint, f: |v: &[u8]| -> T) -> T {
-    use unstable::intrinsics::{to_le16, to_le32, to_le64};
+    use mem::{to_le16, to_le32, to_le64};
     use cast::transmute;
 
     // LLVM fails to properly optimize this when using shifts instead of the to_le* intrinsics
@@ -77,7 +77,7 @@ pub fn u64_to_le_bytes<T>(n: u64, size: uint, f: |v: &[u8]| -> T) -> T {
 }
 
 pub fn u64_to_be_bytes<T>(n: u64, size: uint, f: |v: &[u8]| -> T) -> T {
-    use unstable::intrinsics::{to_be16, to_be32, to_be64};
+    use mem::{to_be16, to_be32, to_be64};
     use cast::transmute;
 
     // LLVM fails to properly optimize this when using shifts instead of the to_be* intrinsics
@@ -105,7 +105,7 @@ pub fn u64_from_be_bytes(data: &[u8],
                          size: uint)
                       -> u64 {
     use ptr::{copy_nonoverlapping_memory, offset, mut_offset};
-    use unstable::intrinsics::from_be64;
+    use mem::from_be64;
     use vec::MutableVector;
 
     assert!(size <= 8u);
diff --git a/src/libstd/mem.rs b/src/libstd/mem.rs
index c1cf226a8f2..c7425d5b2b7 100644
--- a/src/libstd/mem.rs
+++ b/src/libstd/mem.rs
@@ -10,7 +10,10 @@
 
 //! Functions relating to memory layout
 
+#[allow(missing_doc)]; // FIXME
+
 use unstable::intrinsics;
+use unstable::intrinsics::{bswap16, bswap32, bswap64};
 
 /// Returns the size of a type
 #[inline]
@@ -91,6 +94,34 @@ pub unsafe fn move_val_init<T>(dst: &mut T, src: T) {
     intrinsics::move_val_init(dst, src)
 }
 
+#[cfg(target_endian = "little")] #[inline] pub fn to_le16(x: i16) -> i16 { x }
+#[cfg(target_endian = "big")]    #[inline] pub fn to_le16(x: i16) -> i16 { unsafe { bswap16(x) } }
+#[cfg(target_endian = "little")] #[inline] pub fn to_le32(x: i32) -> i32 { x }
+#[cfg(target_endian = "big")]    #[inline] pub fn to_le32(x: i32) -> i32 { unsafe { bswap32(x) } }
+#[cfg(target_endian = "little")] #[inline] pub fn to_le64(x: i64) -> i64 { x }
+#[cfg(target_endian = "big")]    #[inline] pub fn to_le64(x: i64) -> i64 { unsafe { bswap64(x) } }
+
+#[cfg(target_endian = "little")] #[inline] pub fn to_be16(x: i16) -> i16 { unsafe { bswap16(x) } }
+#[cfg(target_endian = "big")]    #[inline] pub fn to_be16(x: i16) -> i16 { x }
+#[cfg(target_endian = "little")] #[inline] pub fn to_be32(x: i32) -> i32 { unsafe { bswap32(x) } }
+#[cfg(target_endian = "big")]    #[inline] pub fn to_be32(x: i32) -> i32 { x }
+#[cfg(target_endian = "little")] #[inline] pub fn to_be64(x: i64) -> i64 { unsafe { bswap64(x) } }
+#[cfg(target_endian = "big")]    #[inline] pub fn to_be64(x: i64) -> i64 { x }
+
+#[cfg(target_endian = "little")] #[inline] pub fn from_le16(x: i16) -> i16 { x }
+#[cfg(target_endian = "big")]    #[inline] pub fn from_le16(x: i16) -> i16 { unsafe { bswap16(x) } }
+#[cfg(target_endian = "little")] #[inline] pub fn from_le32(x: i32) -> i32 { x }
+#[cfg(target_endian = "big")]    #[inline] pub fn from_le32(x: i32) -> i32 { unsafe { bswap32(x) } }
+#[cfg(target_endian = "little")] #[inline] pub fn from_le64(x: i64) -> i64 { x }
+#[cfg(target_endian = "big")]    #[inline] pub fn from_le64(x: i64) -> i64 { unsafe { bswap64(x) } }
+
+#[cfg(target_endian = "little")] #[inline] pub fn from_be16(x: i16) -> i16 { unsafe { bswap16(x) } }
+#[cfg(target_endian = "big")]    #[inline] pub fn from_be16(x: i16) -> i16 { x }
+#[cfg(target_endian = "little")] #[inline] pub fn from_be32(x: i32) -> i32 { unsafe { bswap32(x) } }
+#[cfg(target_endian = "big")]    #[inline] pub fn from_be32(x: i32) -> i32 { x }
+#[cfg(target_endian = "little")] #[inline] pub fn from_be64(x: i64) -> i64 { unsafe { bswap64(x) } }
+#[cfg(target_endian = "big")]    #[inline] pub fn from_be64(x: i64) -> i64 { x }
+
 
 #[cfg(test)]
 mod tests {
diff --git a/src/libstd/unstable/intrinsics.rs b/src/libstd/unstable/intrinsics.rs
index 8f313ed661d..105236b5f4c 100644
--- a/src/libstd/unstable/intrinsics.rs
+++ b/src/libstd/unstable/intrinsics.rs
@@ -439,33 +439,6 @@ extern "rust-intrinsic" {
     pub fn u64_mul_with_overflow(x: u64, y: u64) -> (u64, bool);
 }
 
-#[cfg(target_endian = "little")] #[inline] pub fn to_le16(x: i16) -> i16 { x }
-#[cfg(target_endian = "big")]    #[inline] pub fn to_le16(x: i16) -> i16 { unsafe { bswap16(x) } }
-#[cfg(target_endian = "little")] #[inline] pub fn to_le32(x: i32) -> i32 { x }
-#[cfg(target_endian = "big")]    #[inline] pub fn to_le32(x: i32) -> i32 { unsafe { bswap32(x) } }
-#[cfg(target_endian = "little")] #[inline] pub fn to_le64(x: i64) -> i64 { x }
-#[cfg(target_endian = "big")]    #[inline] pub fn to_le64(x: i64) -> i64 { unsafe { bswap64(x) } }
-
-#[cfg(target_endian = "little")] #[inline] pub fn to_be16(x: i16) -> i16 { unsafe { bswap16(x) } }
-#[cfg(target_endian = "big")]    #[inline] pub fn to_be16(x: i16) -> i16 { x }
-#[cfg(target_endian = "little")] #[inline] pub fn to_be32(x: i32) -> i32 { unsafe { bswap32(x) } }
-#[cfg(target_endian = "big")]    #[inline] pub fn to_be32(x: i32) -> i32 { x }
-#[cfg(target_endian = "little")] #[inline] pub fn to_be64(x: i64) -> i64 { unsafe { bswap64(x) } }
-#[cfg(target_endian = "big")]    #[inline] pub fn to_be64(x: i64) -> i64 { x }
-
-#[cfg(target_endian = "little")] #[inline] pub fn from_le16(x: i16) -> i16 { x }
-#[cfg(target_endian = "big")]    #[inline] pub fn from_le16(x: i16) -> i16 { unsafe { bswap16(x) } }
-#[cfg(target_endian = "little")] #[inline] pub fn from_le32(x: i32) -> i32 { x }
-#[cfg(target_endian = "big")]    #[inline] pub fn from_le32(x: i32) -> i32 { unsafe { bswap32(x) } }
-#[cfg(target_endian = "little")] #[inline] pub fn from_le64(x: i64) -> i64 { x }
-#[cfg(target_endian = "big")]    #[inline] pub fn from_le64(x: i64) -> i64 { unsafe { bswap64(x) } }
-
-#[cfg(target_endian = "little")] #[inline] pub fn from_be16(x: i16) -> i16 { unsafe { bswap16(x) } }
-#[cfg(target_endian = "big")]    #[inline] pub fn from_be16(x: i16) -> i16 { x }
-#[cfg(target_endian = "little")] #[inline] pub fn from_be32(x: i32) -> i32 { unsafe { bswap32(x) } }
-#[cfg(target_endian = "big")]    #[inline] pub fn from_be32(x: i32) -> i32 { x }
-#[cfg(target_endian = "little")] #[inline] pub fn from_be64(x: i64) -> i64 { unsafe { bswap64(x) } }
-#[cfg(target_endian = "big")]    #[inline] pub fn from_be64(x: i64) -> i64 { x }
 
 /// `TypeId` represents a globally unique identifier for a type
 #[lang="type_id"] // This needs to be kept in lockstep with the code in trans/intrinsic.rs and
diff --git a/src/libuuid/lib.rs b/src/libuuid/lib.rs
index 1951c52237f..36b267c7eb7 100644
--- a/src/libuuid/lib.rs
+++ b/src/libuuid/lib.rs
@@ -203,7 +203,7 @@ impl Uuid {
     /// * `d3` A 16-bit word
     /// * `d4` Array of 8 octets
     pub fn from_fields(d1: u32, d2: u16, d3: u16, d4: &[u8]) -> Uuid {
-        use std::unstable::intrinsics::{to_be16, to_be32};
+        use std::mem::{to_be16, to_be32};
 
         // First construct a temporary field-based struct
         let mut fields = UuidFields {
@@ -329,7 +329,7 @@ impl Uuid {
     ///
     /// Example: `550e8400-e29b-41d4-a716-446655440000`
     pub fn to_hyphenated_str(&self) -> ~str {
-        use std::unstable::intrinsics::{to_be16, to_be32};
+        use std::mem::{to_be16, to_be32};
         // Convert to field-based struct as it matches groups in output.
         // Ensure fields are in network byte order, as per RFC.
         let mut uf: UuidFields;