x64 Software Conventions

The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at x64 Software Conventions.

This section describes the Visual C++ calling convention methodology for x64, 64-bit extension to the x86 architecture.

• Overview of x64 Calling Conventions

• Types and Storage

• Register Usage

• Calling Convention

• Stack Usage

• Prolog and Epilog

• Exception Handling

• Intrinsics and Inline Assembly

• Image Format

The following compiler option helps you optimize your application for x64:

• /favor (Optimize for Architecture Specifics)

Calling Conventions