diff options
Diffstat (limited to 'third_party/rust/packed_simd/src/codegen/swap_bytes.rs')
-rw-r--r-- | third_party/rust/packed_simd/src/codegen/swap_bytes.rs | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/third_party/rust/packed_simd/src/codegen/swap_bytes.rs b/third_party/rust/packed_simd/src/codegen/swap_bytes.rs deleted file mode 100644 index 9cf34a3e04..0000000000 --- a/third_party/rust/packed_simd/src/codegen/swap_bytes.rs +++ /dev/null @@ -1,149 +0,0 @@ -//! Horizontal swap bytes reductions. - -// FIXME: investigate using `llvm.bswap` -// https://github.com/rust-lang-nursery/packed_simd/issues/19 - -use crate::*; - -pub(crate) trait SwapBytes { - fn swap_bytes(self) -> Self; -} - -macro_rules! impl_swap_bytes { - (v16: $($id:ident,)+) => { - $( - impl SwapBytes for $id { - #[inline] - fn swap_bytes(self) -> Self { - shuffle!(self, [1, 0]) - } - } - )+ - }; - (v32: $($id:ident,)+) => { - $( - impl SwapBytes for $id { - #[inline] - #[allow(clippy::useless_transmute)] - fn swap_bytes(self) -> Self { - unsafe { - let bytes: u8x4 = crate::mem::transmute(self); - let result: u8x4 = shuffle!(bytes, [3, 2, 1, 0]); - crate::mem::transmute(result) - } - } - } - )+ - }; - (v64: $($id:ident,)+) => { - $( - impl SwapBytes for $id { - #[inline] - #[allow(clippy::useless_transmute)] - fn swap_bytes(self) -> Self { - unsafe { - let bytes: u8x8 = crate::mem::transmute(self); - let result: u8x8 = shuffle!( - bytes, [7, 6, 5, 4, 3, 2, 1, 0] - ); - crate::mem::transmute(result) - } - } - } - )+ - }; - (v128: $($id:ident,)+) => { - $( - impl SwapBytes for $id { - #[inline] - #[allow(clippy::useless_transmute)] - fn swap_bytes(self) -> Self { - unsafe { - let bytes: u8x16 = crate::mem::transmute(self); - let result: u8x16 = shuffle!(bytes, [ - 15, 14, 13, 12, 11, 10, 9, 8, - 7, 6, 5, 4, 3, 2, 1, 0 - ]); - crate::mem::transmute(result) - } - } - } - )+ - }; - (v256: $($id:ident,)+) => { - $( - impl SwapBytes for $id { - #[inline] - #[allow(clippy::useless_transmute)] - fn swap_bytes(self) -> Self { - unsafe { - let bytes: u8x32 = crate::mem::transmute(self); - let result: u8x32 = shuffle!(bytes, [ - 31, 30, 29, 28, 27, 26, 25, 24, - 23, 22, 21, 20, 19, 18, 17, 16, - 15, 14, 13, 12, 11, 10, 9, 8, - 7, 6, 5, 4, 3, 2, 1, 0 - ]); - crate::mem::transmute(result) - } - } - } - )+ - }; - (v512: $($id:ident,)+) => { - $( - impl SwapBytes for $id { - #[inline] - #[allow(clippy::useless_transmute)] - fn swap_bytes(self) -> Self { - unsafe { - let bytes: u8x64 = crate::mem::transmute(self); - let result: u8x64 = shuffle!(bytes, [ - 63, 62, 61, 60, 59, 58, 57, 56, - 55, 54, 53, 52, 51, 50, 49, 48, - 47, 46, 45, 44, 43, 42, 41, 40, - 39, 38, 37, 36, 35, 34, 33, 32, - 31, 30, 29, 28, 27, 26, 25, 24, - 23, 22, 21, 20, 19, 18, 17, 16, - 15, 14, 13, 12, 11, 10, 9, 8, - 7, 6, 5, 4, 3, 2, 1, 0 - ]); - crate::mem::transmute(result) - } - } - } - )+ - }; -} - -impl_swap_bytes!(v16: u8x2, i8x2,); -impl_swap_bytes!(v32: u8x4, i8x4, u16x2, i16x2,); -// FIXME: 64-bit single element vector -impl_swap_bytes!(v64: u8x8, i8x8, u16x4, i16x4, u32x2, i32x2 /* u64x1, i64x1, */,); - -impl_swap_bytes!(v128: u8x16, i8x16, u16x8, i16x8, u32x4, i32x4, u64x2, i64x2, u128x1, i128x1,); -impl_swap_bytes!(v256: u8x32, i8x32, u16x16, i16x16, u32x8, i32x8, u64x4, i64x4, u128x2, i128x2,); - -impl_swap_bytes!(v512: u8x64, i8x64, u16x32, i16x32, u32x16, i32x16, u64x8, i64x8, u128x4, i128x4,); - -cfg_if! { - if #[cfg(target_pointer_width = "8")] { - impl_swap_bytes!(v16: isizex2, usizex2,); - impl_swap_bytes!(v32: isizex4, usizex4,); - impl_swap_bytes!(v64: isizex8, usizex8,); - } else if #[cfg(target_pointer_width = "16")] { - impl_swap_bytes!(v32: isizex2, usizex2,); - impl_swap_bytes!(v64: isizex4, usizex4,); - impl_swap_bytes!(v128: isizex8, usizex8,); - } else if #[cfg(target_pointer_width = "32")] { - impl_swap_bytes!(v64: isizex2, usizex2,); - impl_swap_bytes!(v128: isizex4, usizex4,); - impl_swap_bytes!(v256: isizex8, usizex8,); - } else if #[cfg(target_pointer_width = "64")] { - impl_swap_bytes!(v128: isizex2, usizex2,); - impl_swap_bytes!(v256: isizex4, usizex4,); - impl_swap_bytes!(v512: isizex8, usizex8,); - } else { - compile_error!("unsupported target_pointer_width"); - } -} |