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-rw-r--r--third_party/rust/packed_simd/src/api/slice/write_to_slice.rs196
1 files changed, 0 insertions, 196 deletions
diff --git a/third_party/rust/packed_simd/src/api/slice/write_to_slice.rs b/third_party/rust/packed_simd/src/api/slice/write_to_slice.rs
deleted file mode 100644
index 5abd4916e0..0000000000
--- a/third_party/rust/packed_simd/src/api/slice/write_to_slice.rs
+++ /dev/null
@@ -1,196 +0,0 @@
-//! Implements methods to write a vector type to a slice.
-
-macro_rules! impl_slice_write_to_slice {
- ([$elem_ty:ident; $elem_count:expr]: $id:ident | $test_tt:tt) => {
- impl $id {
- /// Writes the values of the vector to the `slice`.
- ///
- /// # Panics
- ///
- /// If `slice.len() < Self::lanes()` or `&slice[0]` is not
- /// aligned to an `align_of::<Self>()` boundary.
- #[inline]
- pub fn write_to_slice_aligned(self, slice: &mut [$elem_ty]) {
- unsafe {
- assert!(slice.len() >= $elem_count);
- let target_ptr = slice.as_mut_ptr();
- assert_eq!(target_ptr.align_offset(crate::mem::align_of::<Self>()), 0);
- self.write_to_slice_aligned_unchecked(slice);
- }
- }
-
- /// Writes the values of the vector to the `slice`.
- ///
- /// # Panics
- ///
- /// If `slice.len() < Self::lanes()`.
- #[inline]
- pub fn write_to_slice_unaligned(self, slice: &mut [$elem_ty]) {
- unsafe {
- assert!(slice.len() >= $elem_count);
- self.write_to_slice_unaligned_unchecked(slice);
- }
- }
-
- /// Writes the values of the vector to the `slice`.
- ///
- /// # Safety
- ///
- /// If `slice.len() < Self::lanes()` or `&slice[0]` is not
- /// aligned to an `align_of::<Self>()` boundary, the behavior is
- /// undefined.
- #[inline]
- pub unsafe fn write_to_slice_aligned_unchecked(self, slice: &mut [$elem_ty]) {
- debug_assert!(slice.len() >= $elem_count);
- let target_ptr = slice.as_mut_ptr();
- debug_assert_eq!(target_ptr.align_offset(crate::mem::align_of::<Self>()), 0);
-
- #[allow(clippy::cast_ptr_alignment)]
- #[allow(clippy::cast_ptr_alignment)]
- #[allow(clippy::cast_ptr_alignment)]
- #[allow(clippy::cast_ptr_alignment)]
- *(target_ptr as *mut Self) = self;
- }
-
- /// Writes the values of the vector to the `slice`.
- ///
- /// # Safety
- ///
- /// If `slice.len() < Self::lanes()` the behavior is undefined.
- #[inline]
- pub unsafe fn write_to_slice_unaligned_unchecked(self, slice: &mut [$elem_ty]) {
- debug_assert!(slice.len() >= $elem_count);
- let target_ptr = slice.as_mut_ptr().cast();
- let self_ptr = &self as *const Self as *const u8;
- crate::ptr::copy_nonoverlapping(self_ptr, target_ptr, crate::mem::size_of::<Self>());
- }
- }
-
- test_if! {
- $test_tt:
- paste::item! {
- // Comparisons use integer casts within mantissa^1 range.
- #[allow(clippy::float_cmp)]
- pub mod [<$id _slice_write_to_slice>] {
- use super::*;
- use crate::iter::Iterator;
-
- #[cfg_attr(not(target_arch = "wasm32"), test)]
- #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
- fn write_to_slice_unaligned() {
- let mut unaligned = [0 as $elem_ty; $id::lanes() + 1];
- let vec = $id::splat(42 as $elem_ty);
- vec.write_to_slice_unaligned(&mut unaligned[1..]);
- for (index, &b) in unaligned.iter().enumerate() {
- if index == 0 {
- assert_eq!(b, 0 as $elem_ty);
- } else {
- assert_eq!(b, 42 as $elem_ty);
- assert_eq!(b, vec.extract(index - 1));
- }
- }
- }
-
- // FIXME: wasm-bindgen-test does not support #[should_panic]
- // #[cfg_attr(not(target_arch = "wasm32"), test)]
- // #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
- #[cfg(not(target_arch = "wasm32"))]
- #[test]
- #[should_panic]
- fn write_to_slice_unaligned_fail() {
- let mut unaligned = [0 as $elem_ty; $id::lanes() + 1];
- let vec = $id::splat(42 as $elem_ty);
- vec.write_to_slice_unaligned(&mut unaligned[2..]);
- }
-
- union A {
- data: [$elem_ty; 2 * $id::lanes()],
- _vec: $id,
- }
-
- #[cfg_attr(not(target_arch = "wasm32"), test)]
- #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
- fn write_to_slice_aligned() {
- let mut aligned = A {
- data: [0 as $elem_ty; 2 * $id::lanes()],
- };
- let vec = $id::splat(42 as $elem_ty);
- unsafe {
- vec.write_to_slice_aligned(
- &mut aligned.data[$id::lanes()..]
- );
- for (idx, &b) in aligned.data.iter().enumerate() {
- if idx < $id::lanes() {
- assert_eq!(b, 0 as $elem_ty);
- } else {
- assert_eq!(b, 42 as $elem_ty);
- assert_eq!(
- b, vec.extract(idx - $id::lanes())
- );
- }
- }
- }
- }
-
- // FIXME: wasm-bindgen-test does not support #[should_panic]
- // #[cfg_attr(not(target_arch = "wasm32"), test)]
- // #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
- #[cfg(not(target_arch = "wasm32"))]
- #[test]
- #[should_panic]
- fn write_to_slice_aligned_fail_lanes() {
- let mut aligned = A {
- data: [0 as $elem_ty; 2 * $id::lanes()],
- };
- let vec = $id::splat(42 as $elem_ty);
- unsafe {
- vec.write_to_slice_aligned(
- &mut aligned.data[2 * $id::lanes()..]
- )
- };
- }
-
- // FIXME: wasm-bindgen-test does not support #[should_panic]
- // #[cfg_attr(not(target_arch = "wasm32"), test)]
- // #[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
- #[cfg(not(target_arch = "wasm32"))]
- #[test]
- #[should_panic]
- fn write_to_slice_aligned_fail_align() {
- unsafe {
- let mut aligned = A {
- data: [0 as $elem_ty; 2 * $id::lanes()],
- };
-
- // get a pointer to the front of data
- let ptr: *mut $elem_ty
- = aligned.data.as_mut_ptr() as *mut $elem_ty;
- // offset pointer by one element
- let ptr = ptr.wrapping_add(1);
-
- if ptr.align_offset(crate::mem::align_of::<$id>())
- == 0 {
- // the pointer is properly aligned, so
- // write_to_slice_aligned won't fail here (e.g.
- // this can happen for i128x1). So we panic to
- // make the "should_fail" test pass:
- panic!("ok");
- }
-
- // create a slice - this is safe, because the
- // elements of the slice exist, are properly
- // initialized, and properly aligned:
- let s: &mut [$elem_ty]
- = slice::from_raw_parts_mut(ptr, $id::lanes());
- // this should always panic because the slice
- // alignment does not match the alignment
- // requirements for the vector type:
- let vec = $id::splat(42 as $elem_ty);
- vec.write_to_slice_aligned(s);
- }
- }
- }
- }
- }
- };
-}
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