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[breaking change]: mask argument type of _mm_shuffle_ps #586

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Apr 20, 2019
Merged

[breaking change]: mask argument type of _mm_shuffle_ps #586

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2 changes: 1 addition & 1 deletion crates/core_arch/src/x86/sse.rs
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Expand Up @@ -995,7 +995,7 @@ pub const fn _MM_SHUFFLE(z: u32, y: u32, x: u32, w: u32) -> i32 {
#[cfg_attr(test, assert_instr(shufps, mask = 3))]
#[rustc_args_required_const(2)]
#[stable(feature = "simd_x86", since = "1.27.0")]
pub unsafe fn _mm_shuffle_ps(a: __m128, b: __m128, mask: u32) -> __m128 {
pub unsafe fn _mm_shuffle_ps(a: __m128, b: __m128, mask: i32) -> __m128 {
let mask = (mask & 0xFF) as u8;

macro_rules! shuffle_done {
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5 changes: 5 additions & 0 deletions crates/stdsimd-verify/tests/x86-intel.rs
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Expand Up @@ -155,6 +155,11 @@ fn verify_all_signatures() {
// https://github.com/rust-lang/rfcs/issues/2512
"ud2"
=> continue,
// Intel requires the mask argument for _mm_shuffle_ps to be an
// unsigned integer, but all other _mm_shuffle_.. intrinsics
// take a signed-integer. This breaks `_MM_SHUFFLE` for
// `_mm_shuffle_ps`:
"_mm_shuffle_ps" => continue,
_ => {}
}

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