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//! Minimal API of mask vectors.
macro_rules! impl_minimal_mask {
([$elem_ty:ident; $elem_count:expr]: $id:ident | $ielem_ty:ident
| $test_tt:tt | $($elem_name:ident),+ | $(#[$doc:meta])*) => {
$(#[$doc])*
pub type $id = Simd<[$elem_ty; $elem_count]>;
impl sealed::Simd for $id {
type Element = $elem_ty;
const LANES: usize = $elem_count;
type LanesType = [u32; $elem_count];
}
impl $id {
/// Creates a new instance with each vector elements initialized
/// with the provided values.
#[inline]
#[allow(clippy::too_many_arguments)]
pub const fn new($($elem_name: bool),*) -> Self {
Simd(codegen::$id($(Self::bool_to_internal($elem_name)),*))
}
/// Converts a boolean type into the type of the vector lanes.
#[inline]
#[allow(clippy::indexing_slicing)]
const fn bool_to_internal(x: bool) -> $ielem_ty {
[0 as $ielem_ty, !(0 as $ielem_ty)][x as usize]
}
/// Returns the number of vector lanes.
#[inline]
pub const fn lanes() -> usize {
$elem_count
}
/// Constructs a new instance with each element initialized to
/// `value`.
#[inline]
pub const fn splat(value: bool) -> Self {
Simd(codegen::$id($({
#[allow(non_camel_case_types, dead_code)]
struct $elem_name;
Self::bool_to_internal(value)
}),*))
}
/// Extracts the value at `index`.
///
/// # Panics
///
/// If `index >= Self::lanes()`.
#[inline]
pub fn extract(self, index: usize) -> bool {
assert!(index < $elem_count);
unsafe { self.extract_unchecked(index) }
}
/// Extracts the value at `index`.
///
/// # Safety
///
/// If `index >= Self::lanes()` the behavior is undefined.
#[inline]
pub unsafe fn extract_unchecked(self, index: usize) -> bool {
use crate::llvm::simd_extract;
let x: $ielem_ty = simd_extract(self.0, index as u32);
x != 0
}
/// Returns a new vector where the value at `index` is replaced by
/// `new_value`.
///
/// # Panics
///
/// If `index >= Self::lanes()`.
#[inline]
#[must_use = "replace does not modify the original value - \
it returns a new vector with the value at `index` \
replaced by `new_value`d"
]
pub fn replace(self, index: usize, new_value: bool) -> Self {
assert!(index < $elem_count);
unsafe { self.replace_unchecked(index, new_value) }
}
/// Returns a new vector where the value at `index` is replaced by
/// `new_value`.
///
/// # Safety
///
/// If `index >= Self::lanes()` the behavior is undefined.
#[inline]
#[must_use = "replace_unchecked does not modify the original value - \
it returns a new vector with the value at `index` \
replaced by `new_value`d"
]
pub unsafe fn replace_unchecked(
self,
index: usize,
new_value: bool,
) -> Self {
use crate::llvm::simd_insert;
Simd(simd_insert(self.0, index as u32,
Self::bool_to_internal(new_value)))
}
}
test_if!{
$test_tt:
paste::item! {
pub mod [<$id _minimal>] {
use super::*;
#[cfg_attr(not(target_arch = "wasm32"), test)]
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
fn minimal() {
// TODO: test new
// lanes:
assert_eq!($elem_count, $id::lanes());
// splat and extract / extract_unchecked:
let vec = $id::splat(true);
for i in 0..$id::lanes() {
assert_eq!(true, vec.extract(i));
assert_eq!(true,
unsafe { vec.extract_unchecked(i) }
);
}
// replace / replace_unchecked
let new_vec = vec.replace(0, false);
for i in 0..$id::lanes() {
if i == 0 {
assert_eq!(false, new_vec.extract(i));
} else {
assert_eq!(true, new_vec.extract(i));
}
}
let new_vec = unsafe {
vec.replace_unchecked(0, false)
};
for i in 0..$id::lanes() {
if i == 0 {
assert_eq!(false, new_vec.extract(i));
} else {
assert_eq!(true, new_vec.extract(i));
}
}
}
// 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 extract_panic_oob() {
let vec = $id::splat(false);
let _ = vec.extract($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 replace_panic_oob() {
let vec = $id::splat(false);
let _ = vec.replace($id::lanes(), true);
}
}
}
}
}
}