 C166 User's Guide | |
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C166 User's Guide
C166 Introduction Compiling Programs Language Extensions
Keywords Memory Models Tiny Model Small Model Medium Model Compact Model Large Model HCompact Model HLarge Model XLarge Model Memory Types near far bdata ebdata idata sdata huge xhuge Memory Type Comparison Pointers with Memory Types Implicit Memory Types Type Qualifiers const volatile Data Types Special Function Registers sfr Types sbit Types bit Types Bit-Addressable Objects Function Declarations Return Values Register Bank Register Mask Interrupt Functions Fast Interrupts Cached Vectors Fast Register Banks Inline Functions Real-Time Function Tasks Inline Assembly Traditional Inline Assembly Extended Inline Assembly Register Use Use in Macro Definitions Preprocessor Advanced Programming Error Messages Library Reference AppendixInline Assembly
Inline assembly is assembly code that you can insert into your C programs. The Keil C166 C Compiler supports two different methods of inline assembly.
- Traditional Inline Assembly:
Traditional inline assembly requires that you place your assembly instructions between ASM and ENDASM directives and that you compile your C source file into a .SRC file using the SRC directive which you must assemble with the Keil A166 Assembler. - Extended Inline Assembly:
Integrated inline assembly inserts the assembly code directly into the object file output by the compiler and requires no further processing by the assembler. Inline assembly source blocks are marked by the __asm keyword.
The following table compares the inline assembler methods.
| Inline Assembly Comparison | Traditional | Integrated |
|---|---|---|
| Direct to Object | NO | YES |
| Access to C Variables | NO | YES |
| Source-Level Debugging | NO | YES |
| C166 Instructions | YES | YES |
| C167 Instructions | YES | YES |
| XC16x Instructions | YES | YES |
| ST10 Instructions | YES | YES |
| MAC Instructions | YES | YES |
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