From 3f2e605dd12e91f81dd8debf46e69accab3aa1d0 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Fri, 20 Nov 2020 01:52:37 -0300
Subject: [PATCH] common/bit_cast: Add function matching std::bit_cast without
constexpr
Add a std::bit_cast-like function archiving the same runtime results as
the standard function, without compile time support.
This allows us to use bit_cast while we wait for compiler support, it
can be trivially replaced in the future.
---
src/common/CMakeLists.txt | 1 +
src/common/bit_cast.h | 22 ++++++++++++++++++++++
2 files changed, 23 insertions(+)
create mode 100644 src/common/bit_cast.h
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 207c7a0a61..d20e6c3b54 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -102,6 +102,7 @@ add_library(common STATIC
atomic_ops.h
detached_tasks.cpp
detached_tasks.h
+ bit_cast.h
bit_field.h
bit_util.h
cityhash.cpp
diff --git a/src/common/bit_cast.h b/src/common/bit_cast.h
new file mode 100644
index 0000000000..a32a063d1e
--- /dev/null
+++ b/src/common/bit_cast.h
@@ -0,0 +1,22 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <cstring>
+#include <type_traits>
+
+namespace Common {
+
+template <typename To, typename From>
+[[nodiscard]] std::enable_if_t<sizeof(To) == sizeof(From) && std::is_trivially_copyable_v<From> &&
+ std::is_trivially_copyable_v<To>,
+ To>
+BitCast(const From& src) noexcept {
+ To dst;
+ std::memcpy(&dst, &src, sizeof(To));
+ return dst;
+}
+
+} // namespace Common