Intrinsics-Dude Improved support for compiler intrinsics in Visual Studio. This extension can be found in the visual studio extensions gallery or download latest installer IntrinsicsDude.vsix (v1.2.2.0) . If intrinsics are not low level enough, consider Asm-Dude . Features Quickinfo Tooltips QuickInfo is an IntelliSense feature that displays method signatures and descriptions when a user moves the pointer over a method name. The minimal default tooltips are replaced by more informative ones. Statement Completion Statement completion is the process by which the language service helps users finish a language keyword or element that they have started typing in the editor. The minimal default tooltips are replaced by more informative ones. If the current keyword starts with _m the code completion key combination (typically CTRL+SPACE) will populate a separate completion list called Intrinsics. (Note: this feature is switched off by default.) Signature Help Signature Help (also known as Parameter Info) displays the signature of a method in a tooltip when a user types the parameter list start character (typically an opening parenthesis). As a parameter and parameter separator (typically a comma) are typed, the tooltip is updated to show the next parameter in bold. The Source If you are reading this you are most likely a C/C++ programmer, if you are still interested in some dirty C# you can run the extension from source code. To do that, Visual Studio 2015 SDK needs to be installed. To run the extension, hit F5 or choose the Debug > Start Debugging menu command. A new instance of Visual Studio will launch under the experimental hive. Known Issues Incorrect syntax highlighting of SIMD registers and intrinsic functions in code comment blocks. No support for AMD-specific intrinsics (ammintrin.h) Feature Requests: (desire something - let me know) Restrict code completion suggestions based on the return type when used as a parameter in an intrinsic. Fix _may_i_use_cpu_feature: not showing the valid feature flags. Add Performance data to QuickInfo tooltips. No syntax highlighting for intrinsic keywords that are not enabled. Descriptions for all int definitions such as _MM_ROUND_MASK etc. Support AMD-specific intrinsics (ammintrin.h) Updates 25 Juli 2016: Start of project 26 August 2016: First release (v1.0.0.7) 2 September 2016: Added Performance data to QuickInfo tooltips (v1.1.0.0) 6 January 2019: Added VS2019 (v1.2.0.1)