early-access version 1255

2020-12-28 15:15:37 +00:00
parent 84b39492d1
commit 78b48028e1
6254 changed files with 1868140 additions and 0 deletions
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+/* This file is part of the dynarmic project.
+ * Copyright (c) 2018 MerryMage
+ * SPDX-License-Identifier: 0BSD
+ */
+
+#pragma once
+
+#include <utility>
+
+#include "common/common_types.h"
+
+namespace Dynarmic::Common {
+
+/**
+ * This function is a workaround for a bug in MSVC 19.12 where fold expressions
+ * do not work when the /permissive- flag is enabled.
+ */
+template<typename T, typename... Ts>
+constexpr T Sum(T first, Ts&&... rest) {
+    if constexpr (sizeof...(rest) == 0) {
+        return first;
+    } else {
+        return first + Sum(std::forward<Ts>(rest)...);
+    }
+}
+
+/**
+ * Input is a u0.9 fixed point number. Only values in [0.5, 1.0) are valid.
+ * Output is a u0.8 fixed point number, with an implied 1 prefixed.
+ * i.e.: The output is a value in [1.0, 2.0).
+ *
+ * @see RecipEstimate() within the ARMv8 architecture reference manual
+ *      for a general overview of the requirements of the algorithm.
+ */
+u8 RecipEstimate(u64 a);
+
+/**
+ * Input is a u0.9 fixed point number. Only values in [0.25, 1.0) are valid.
+ * Output is a u0.8 fixed point number, with an implied 1 prefixed.
+ * i.e.: The output is a value in [1.0, 2.0).
+ *
+ * @see RecipSqrtEstimate() within the ARMv8 architecture reference manual
+ *      for a general overview of the requirements of the algorithm.
+ */
+u8 RecipSqrtEstimate(u64 a);
+
+} // namespace Dynarmic::Common