ircd::math: Add vector fallbacks for standard exp.

include/ircd/math/exp.h

@@ -0,0 +1,67 @@
+// 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_EXP_H
+
+namespace ircd::math
+{
+	template<class T>
+	typename std::enable_if<simd::is<T>(), T>::type
+	exp(T);
+
+	template<class T>
+	typename std::enable_if<simd::is<T>(), T>::type
+	expf(T);
+
+	template<class T>
+	typename std::enable_if<simd::is<T>(), T>::type
+	expl(T);
+}
+
+namespace ircd
+{
+	using ::exp;
+	using ::expf;
+	using ::expl;
+	using math::exp;
+	using math::expf;
+	using math::expl;
+}
+
+template<class T>
+inline typename std::enable_if<ircd::simd::is<T>(), T>::type
+ircd::math::expl(T a)
+{
+	for(uint i(0); i < simd::lanes<T>(); ++i)
+		a[i] = ::expl(a[i]);
+
+	return a;
+}
+
+template<class T>
+inline typename std::enable_if<ircd::simd::is<T>(), T>::type
+ircd::math::expf(T a)
+{
+	for(uint i(0); i < simd::lanes<T>(); ++i)
+		a[i] = ::expf(a[i]);
+
+	return a;
+}
+
+template<class T>
+inline typename std::enable_if<ircd::simd::is<T>(), T>::type
+ircd::math::exp(T a)
+{
+	for(uint i(0); i < simd::lanes<T>(); ++i)
+		a[i] = std::exp(a[i]);
+
+	return a;
+}

include/ircd/math/math.h

@@ -16,5 +16,6 @@
 #include "mean.h"
 #include "tanh.h"
 #include "pow.h"
+#include "exp.h"
 #include "fmma.h"
 #include "norm.h"