Compiler intrinsics and assembly language

Learn how Visual Studio can create low-level, processor-specific code for maximum performance and control.

Use compiler intrinsics

Overview

• Compiler intrinsics overview

Reference

• ARM intrinsics
• ARM64 intrinsics
• x86 intrinsics list
• x64 (amd64) intrinsics list
• Intrinsics available on all architectures
• Alphabetical intrinsics list

Use inline assembly for x86 in Microsoft C/C++

Overview

• Inline assembler overview

Concept

• The __asm keyword

How-To Guide

• Use assembly language in __asm blocks
• Use C or C++ in __asm blocks
• Use and preserve registers
• Call C++ functions in inline assembly
• Optimize inline assembly

Use the ARM and ARM64 assembler

Reference

• ARM and ARM64 assembler reference
• ARM and ARM64 assembler command-line reference
• ARM and ARM64 assembler diagnostic messages
• ARM and ARM64 assembler directives

Use the x86 and x64 assembler

Reference

• Microsoft Macro Assembler for x86 and x64 reference
• MASM for x64 (ml64.exe)
• ML and ML64 command-line reference
• Directives reference
• Symbols reference
• Operators reference
• MASM BNF grammar
• ML and ML64 error messages
• Processor manufacturer programming manuals