Exempt Arm v7 Neon from float testing

Author: workingjubilee

crates/core_simd/tests/ops_macros.rs

@@ -526,6 +526,9 @@ macro_rules! impl_float_tests {
                     );
                 }
 
+                // FIXME: v7 Arm Neon flushes subnormals, violating Rust float opsem
+                // see https://github.com/rust-lang/portable-simd/issues/439
+                #[cfg(not(all(target_arch = "arm", target_feature = "neon")))]
                 fn is_normal<const LANES: usize>() {
                     test_helpers::test_unary_mask_elementwise(
                         &Vector::<LANES>::is_normal,
@@ -534,6 +537,9 @@ macro_rules! impl_float_tests {
                     );
                 }
 
+                // FIXME: v7 Arm Neon flushes subnormals, violating Rust float opsem
+                // see https://github.com/rust-lang/portable-simd/issues/439
+                #[cfg(not(all(target_arch = "arm", target_feature = "neon")))]
                 fn is_subnormal<const LANES: usize>() {
                     test_helpers::test_unary_mask_elementwise(
                         &Vector::<LANES>::is_subnormal,