Add missing functions to pseudo vector

reco/L1/vectors/PSEUDO_F32vec4.h

@@ -172,6 +172,15 @@ public:
     return strm;
   }
 
+  /// Checks, if all bands are equal
+  /// NOTE: two values defined as signaling_NaN() are not equal, thus if there are all or one
+  /// of the words are kNaN, the function returns false
+  bool IsHorizontallyEqual() const { return v[0] == v[1] && v[1] == v[2] && v[2] == v[3]; }
+
+  /// Checks, if any of the bands is NaN
+  bool IsNanAny() const { return std::isnan(v[0]) || std::isnan(v[1]) || std::isnan(v[2]) || std::isnan(v[3]); }
+
+
 } __attribute__((aligned(16)));
 ;