Microsoft Specific

Assembly language serves many purposes, such as improving program speed, reducing memory needs, and controlling hardware. You can use the inline assembler to embed assembly-language instructions directly in your C and C++ source programs without extra assembly and link steps. The inline assembler is built into the compiler, so you don't need a separate assembler such as the Microsoft Macro Assembler (MASM).

Inline assembly is not supported on the ARM and x64 processors. The following topics explain how to use the Visual C/C++ inline assembler with x86 processors:

• Inline Assembler Overview

• Advantages of Inline Assembly

• __asm

• Using Assembly Language in __asm Blocks

• Using C or C++ in __asm Blocks

• Using and Preserving Registers in Inline Assembly

• Jumping to Labels in Inline Assembly

• Calling C Functions in Inline Assembly

• Calling C++ Functions in Inline Assembly

• Defining __asm Blocks as C Macros

• Optimizing Inline Assembly

END Microsoft Specific

See also

Compiler Intrinsics and Assembly Language
C++ Language Reference