update to Vc 0.7.3-dev

[u/mrichter/AliRoot.git] / Vc / include / Vc / common / iif.h

diff --git a/Vc/include/Vc/common/iif.h b/Vc/include/Vc/common/iif.h
new file mode 100644 (file)
index 0000000..c5642ca
--- /dev/null
+++ b/Vc/include/Vc/common/iif.h
@@ -0,0 +1,62 @@
+/*  This file is part of the Vc library. {{{
+
+    Copyright (C) 2012 Matthias Kretz <kretz@kde.org>
+
+    Vc is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as
+    published by the Free Software Foundation, either version 3 of
+    the License, or (at your option) any later version.
+
+    Vc is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with Vc.  If not, see <http://www.gnu.org/licenses/>.
+
+}}}*/
+
+#ifndef VC_COMMON_IIF_H
+#define VC_COMMON_IIF_H
+
+#include "macros.h"
+
+namespace AliRoot {
+namespace Vc
+{
+/**
+ * Function to mimic the ternary operator '?:'.
+ *
+ * \param condition  Determines which values are returned. This is analog to the first argument to
+ *                   the ternary operator.
+ * \param trueValue  The values to return where \p condition is \c true.
+ * \param falseValue The values to return where \p condition is \c false.
+ * \return A combination of entries from \p trueValue and \p falseValue, according to \p condition.
+ *
+ * So instead of the scalar variant
+ * \code
+ * float x = a > 1.f ? b : b + c;
+ * \endcode
+ * you'd write
+ * \code
+ * float_v x = Vc::iif (a > 1.f, b, b + c);
+ * \endcode
+ */
+#ifndef VC_MSVC
+template<typename T> static Vc_ALWAYS_INLINE Vector<T> iif (typename Vector<T>::Mask condition, Vector<T> trueValue, Vector<T> falseValue)
+{
+#else
+template<typename T> static Vc_ALWAYS_INLINE Vector<T> iif (const typename Vector<T>::Mask &condition, const Vector<T> &trueValue, const Vector<T> &_falseValue)
+{
+    Vector<T> falseValue(_falseValue);
+#endif
+    falseValue(condition) = trueValue;
+    return falseValue;
+}
+} // namespace Vc
+} // namespace AliRoot
+
+#include "undomacros.h"
+
+#endif // VC_COMMON_IIF_H