diff options
Diffstat (limited to 'third_party/rust/packed_simd/src/api/swap_bytes.rs')
| -rw-r--r-- | third_party/rust/packed_simd/src/api/swap_bytes.rs | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/third_party/rust/packed_simd/src/api/swap_bytes.rs b/third_party/rust/packed_simd/src/api/swap_bytes.rs deleted file mode 100644 index 4649ed679b..0000000000 --- a/third_party/rust/packed_simd/src/api/swap_bytes.rs +++ /dev/null @@ -1,192 +0,0 @@ -//! Horizontal swap bytes - -macro_rules! impl_swap_bytes { - ([$elem_ty:ident; $elem_count:expr]: $id:ident | $test_tt:tt) => { - impl $id { - /// Reverses the byte order of the vector. - #[inline] - pub fn swap_bytes(self) -> Self { - super::codegen::swap_bytes::SwapBytes::swap_bytes(self) - } - - /// Converts self to little endian from the target's endianness. - /// - /// On little endian this is a no-op. On big endian the bytes are - /// swapped. - #[inline] - pub fn to_le(self) -> Self { - #[cfg(target_endian = "little")] - { - self - } - #[cfg(not(target_endian = "little"))] - { - self.swap_bytes() - } - } - - /// Converts self to big endian from the target's endianness. - /// - /// On big endian this is a no-op. On little endian the bytes are - /// swapped. - #[inline] - pub fn to_be(self) -> Self { - #[cfg(target_endian = "big")] - { - self - } - #[cfg(not(target_endian = "big"))] - { - self.swap_bytes() - } - } - - /// Converts a vector from little endian to the target's endianness. - /// - /// On little endian this is a no-op. On big endian the bytes are - /// swapped. - #[inline] - pub fn from_le(x: Self) -> Self { - #[cfg(target_endian = "little")] - { - x - } - #[cfg(not(target_endian = "little"))] - { - x.swap_bytes() - } - } - - /// Converts a vector from big endian to the target's endianness. - /// - /// On big endian this is a no-op. On little endian the bytes are - /// swapped. - #[inline] - pub fn from_be(x: Self) -> Self { - #[cfg(target_endian = "big")] - { - x - } - #[cfg(not(target_endian = "big"))] - { - x.swap_bytes() - } - } - } - - test_if! { - $test_tt: - paste::item! { - pub mod [<$id _swap_bytes>] { - use super::*; - - const BYTES: [u8; 64] = [ - 0, 1, 2, 3, 4, 5, 6, 7, - 8, 9, 10, 11, 12, 13, 14, 15, - 16, 17, 18, 19, 20, 21, 22, 23, - 24, 25, 26, 27, 28, 29, 30, 31, - 32, 33, 34, 35, 36, 37, 38, 39, - 40, 41, 42, 43, 44, 45, 46, 47, - 48, 49, 50, 51, 52, 53, 54, 55, - 56, 57, 58, 59, 60, 61, 62, 63, - ]; - - macro_rules! swap { - ($func: ident) => {{ - // catch possible future >512 vectors - assert!(mem::size_of::<$id>() <= 64); - - let mut actual = BYTES; - let elems: &mut [$elem_ty] = unsafe { - slice::from_raw_parts_mut( - actual.as_mut_ptr() as *mut $elem_ty, - $id::lanes(), - ) - }; - - let vec = $id::from_slice_unaligned(elems); - $id::$func(vec).write_to_slice_unaligned(elems); - - actual - }}; - } - - macro_rules! test_swap { - ($func: ident) => {{ - let actual = swap!($func); - let expected = - BYTES.iter().rev() - .skip(64 - crate::mem::size_of::<$id>()); - assert!(actual.iter().zip(expected) - .all(|(x, y)| x == y)); - }}; - } - - macro_rules! test_no_swap { - ($func: ident) => {{ - let actual = swap!($func); - let expected = BYTES.iter() - .take(mem::size_of::<$id>()); - - assert!(actual.iter().zip(expected) - .all(|(x, y)| x == y)); - }}; - } - - #[cfg_attr(not(target_arch = "wasm32"), test)] #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)] - fn swap_bytes() { - test_swap!(swap_bytes); - } - - #[cfg_attr(not(target_arch = "wasm32"), test)] #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)] - fn to_le() { - #[cfg(target_endian = "little")] - { - test_no_swap!(to_le); - } - #[cfg(not(target_endian = "little"))] - { - test_swap!(to_le); - } - } - - #[cfg_attr(not(target_arch = "wasm32"), test)] #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)] - fn to_be() { - #[cfg(target_endian = "big")] - { - test_no_swap!(to_be); - } - #[cfg(not(target_endian = "big"))] - { - test_swap!(to_be); - } - } - - #[cfg_attr(not(target_arch = "wasm32"), test)] #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)] - fn from_le() { - #[cfg(target_endian = "little")] - { - test_no_swap!(from_le); - } - #[cfg(not(target_endian = "little"))] - { - test_swap!(from_le); - } - } - - #[cfg_attr(not(target_arch = "wasm32"), test)] #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)] - fn from_be() { - #[cfg(target_endian = "big")] - { - test_no_swap!(from_be); - } - #[cfg(not(target_endian = "big"))] - { - test_swap!(from_be); - } - } - } - } - } - }; -} |