Silence warnings

crates/core_simd/src/transmute.rs

@@ -1,4 +1,5 @@
 /// Provides implementations of `From<$a> for $b` and `From<$b> for $a` that transmutes the value.
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
 macro_rules! from_transmute {
     { unsafe $a:ty => $b:ty } => {
         from_transmute!{ @impl $a => $b }

crates/core_simd/tests/f32_ops.rs

@@ -1,5 +1,3 @@
-#![feature(is_subnormal)]
-
 #[macro_use]
 mod ops_macros;
 impl_float_tests! { SimdF32, f32, i32 }

crates/core_simd/tests/f64_ops.rs

@@ -1,5 +1,3 @@
-#![feature(is_subnormal)]
-
 #[macro_use]
 mod ops_macros;
 impl_float_tests! { SimdF64, f64, i64 }