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Adds conditional byteswapping intrinsics #7194

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Adds conditional byteswapping intrinsics #7194

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14 changes: 14 additions & 0 deletions src/libstd/unstable/intrinsics.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -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 }