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Fix is_subnormal on architectures that flush subnormals to zero

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This commit is contained in:
Caleb Zulawski 2023-07-21 15:33:09 -04:00
parent 7c7dbe0c50
commit 11c43c0c16
1 changed files with 4 additions and 1 deletions
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5
crates/core_simd/src/elements/float.rs
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@ -336,7 +336,10 @@ fn is_finite(self) -> Self::Mask {
#[inline] #[inline]
fn is_subnormal(self) -> Self::Mask { fn is_subnormal(self) -> Self::Mask {
self.abs().simd_ne(Self::splat(0.0)) & (self.to_bits() & Self::splat(Self::Scalar::INFINITY).to_bits()).simd_eq(Simd::splat(0)) // On some architectures (e.g. armv7 and some ppc) subnormals are flushed to zero,
// so this comparison must be done with integers.
let not_zero = self.abs().to_bits().simd_ne(Self::splat(0.0).to_bits());
not_zero & (self.to_bits() & Self::splat(Self::Scalar::INFINITY).to_bits()).simd_eq(Simd::splat(0))
} }
#[inline] #[inline]