ircd::math: Add fallback for vectorized single-precision power of.

include/ircd/math/math.h

@@ -15,6 +15,7 @@
 #include "inv.h"
 #include "mean.h"
 #include "tanh.h"
+#include "pow.h"
 #include "fmma.h"
 #include "norm.h"
 
@@ -22,4 +23,5 @@ namespace ircd
 {
 	using math::mean;
 	using math::tanh;
+	using math::pow;
 }

include/ircd/math/pow.h

@@ -0,0 +1,32 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2021 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+#pragma once
+#define HAVE_IRCD_MATH_POW_H
+
+namespace ircd::math
+{
+	template<class T,
+	         class E>
+	typename std::enable_if<simd::is<T>(), T>::type
+	pow(T, const E);
+}
+
+template<class T,
+         class E>
+inline typename std::enable_if<ircd::simd::is<T>(), T>::type
+ircd::math::pow(T a,
+                const E e)
+{
+	for(uint i(0); i < simd::lanes<T>(); ++i)
+		a[i] = std::pow(a[i], e);
+
+	return a;
+}