From ffe451afe78d2802227e2b4891bcd6017022514a Mon Sep 17 00:00:00 2001
From: de4dot <de4dot@gmail.com>
Date: Sat, 23 Feb 2019 12:15:10 +0100
Subject: [PATCH] Add IcedFeatures.Initialize()

---
 Iced/Intel/IcedFeatures.cs | 19 +++++++++++++++++++
 README.md                  |  2 ++
 2 files changed, 21 insertions(+)

diff --git a/Iced/Intel/IcedFeatures.cs b/Iced/Intel/IcedFeatures.cs
index 7e014a7f3..f66e3db3f 100644
--- a/Iced/Intel/IcedFeatures.cs
+++ b/Iced/Intel/IcedFeatures.cs
@@ -21,6 +21,8 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
+using System.Runtime.CompilerServices;
+
 namespace Iced.Intel {
 	/// <summary>
 	/// Gets the available features
@@ -129,5 +131,22 @@ namespace Iced.Intel {
 #endif
 			}
 		}
+
+		/// <summary>
+		/// Initializes some static constructors related to the decoder and instruction info. If those
+		/// static constructors are initialized, the jitter generates faster code since it doesn't have
+		/// to add runtime checks to see if those static constructors must be called.
+		/// 
+		/// This method should be called before using the decoder and instruction info classes and
+		/// should *not* be called from the same method as any code that uses the decoder / instruction
+		/// info classes. Eg. call this method from Main() and decode instructions / get instruction info
+		/// in a method called by Main().
+		/// </summary>
+		public static void Initialize() {
+#if (!NO_DECODER32 || !NO_DECODER64) && !NO_DECODER
+			// The decoder already initializes this stuff, but when it's called, it's a little bit too late.
+			RuntimeHelpers.RunClassConstructor(typeof(Decoder).TypeHandle);
+#endif
+		}
 	}
 }
diff --git a/README.md b/README.md
index cad51a608..f7dcea6be 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ Decoder:
 	- `ByteArrayCodeReader`
 - `InstructionList`
 - `ConstantOffsets`
+- `IcedFeatures.Initialize()`
 
 Formatters:
 
@@ -73,6 +74,7 @@ namespace Iced.Examples {
         const int HEXBYTES_COLUMN_BYTE_LENGTH = 10;
 
         static void Main(string[] args) {
+            IcedFeatures.Initialize();
             DecoderFormatterExample();
             EncoderExample();
             CreateInstructionsExample();