From ab41ef8a41760e882fa5c161f31b60e0a43f4f49 Mon Sep 17 00:00:00 2001
From: Damien L-G <dalg24@gmail.com>
Date: Wed, 3 May 2023 17:00:18 -0400
Subject: [PATCH] Add implementation of bit_cast in
 <Kokkos_BitManipulation.hpp>

---
 core/src/Kokkos_BitManipulation.hpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/core/src/Kokkos_BitManipulation.hpp b/core/src/Kokkos_BitManipulation.hpp
index 50cd92c986..04c9d4b2d2 100644
--- a/core/src/Kokkos_BitManipulation.hpp
+++ b/core/src/Kokkos_BitManipulation.hpp
@@ -20,6 +20,7 @@
 #include <Kokkos_Macros.hpp>
 #include <Kokkos_NumericTraits.hpp>
 #include <climits>  // CHAR_BIT
+#include <cstring>  //memcpy
 #include <type_traits>
 
 namespace Kokkos::Impl {
@@ -98,6 +99,19 @@ inline constexpr bool is_standard_unsigned_integer_type_v =
 
 namespace Kokkos {
 
+//<editor-fold desc="[bit.cast], bit_cast">
+template <class To, class From>
+KOKKOS_FUNCTION std::enable_if_t<sizeof(To) == sizeof(From) &&
+                                     std::is_trivially_copyable_v<To> &&
+                                     std::is_trivially_copyable_v<From>,
+                                 To>
+bit_cast(From const& from) noexcept {
+  To to;
+  memcpy(&to, &from, sizeof(To));
+  return to;
+}
+//</editor-fold>
+
 //<editor-fold desc="[bit.byteswap], byteswap">
 template <class T>
 KOKKOS_FUNCTION constexpr std::enable_if_t<std::is_integral_v<T>, T> byteswap(