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Adds conditional byteswapping intrinsics

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These intrinsics are synthesized, so maybe they should be in another
file. But since they are just a single line of code each, based on the
bswap intrinsics and aren't really intended for public consumption (they should be exposed as a
single function / trait) I thought they would fit here.
This commit is contained in:
Jens Nockert 2013-06-17 02:05:36 +02:00
parent a4cc34fa12
commit bc6848d352
1 changed files with 14 additions and 0 deletions
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14
src/libstd/unstable/intrinsics.rs
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@ -238,3 +238,17 @@ pub extern "rust-intrinsic" {
pub fn bswap32(x: i32) -> i32;
pub fn bswap64(x: i64) -> i64;
}
#[cfg(target_endian = "little")] pub fn to_le16(x: i16) -> i16 { x }
#[cfg(target_endian = "big")] pub fn to_le16(x: i16) -> i16 { unsafe { bswap16(x) } }
#[cfg(target_endian = "little")] pub fn to_le32(x: i32) -> i32 { x }
#[cfg(target_endian = "big")] pub fn to_le32(x: i32) -> i32 { unsafe { bswap32(x) } }
#[cfg(target_endian = "little")] pub fn to_le64(x: i64) -> i64 { x }
#[cfg(target_endian = "big")] pub fn to_le64(x: i64) -> i64 { unsafe { bswap64(x) } }
#[cfg(target_endian = "little")] pub fn to_be16(x: i16) -> i16 { unsafe { bswap16(x) } }
#[cfg(target_endian = "big")] pub fn to_be16(x: i16) -> i16 { x }
#[cfg(target_endian = "little")] pub fn to_be32(x: i32) -> i32 { unsafe { bswap32(x) } }
#[cfg(target_endian = "big")] pub fn to_be32(x: i32) -> i32 { x }
#[cfg(target_endian = "little")] pub fn to_be64(x: i64) -> i64 { unsafe { bswap64(x) } }
#[cfg(target_endian = "big")] pub fn to_be64(x: i64) -> i64 { x }