[clang] [Headers][X86] Allow AVX512 masked arithmetic ss/sd intrinsics to be used in constexpr (PR #162816)

[Simon Pilgrim via cfe-commits]

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@@ -90,6 +95,11 @@ constexpr bool match_v4su(__m128i _v, unsigned a, unsigned b, unsigned c, unsign
   return v[0] == a && v[1] == b && v[2] == c && v[3] == d;
 }
 
+constexpr bool match_v4sf(__m128 _v, float a, float b, float c, float d) {
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RKSimon wrote:

Why not use match_m128?

https://github.com/llvm/llvm-project/pull/162816