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Chapter 7: Porting Code to N32 and 64-Bit Silicon Graphics Systems

This section explains the levels of compatibility between the new 32-bit compilation mode (n32), the old 32-bit mode, and 64-bit programs. It also describes the porting procedure to follow and the changes you must make to port your application from old 32-bit mode to n32-bit mode.

Specifically, this chapter discusses the following topics:

"Compatibility," which describes compatibility between o32, n32, and 64-bit programs.
"N32 Porting Guidelines," which explains guidelines for porting high-level languages.
"Porting Code to 64-Bit Silicon Graphics Systems," which describes data types, predefined types, typedefs, and use of large files on xFS.

This chapter uses the following terminology:

o32: The current 32-bit ABI generated by the ucode compiler, that is, 32-bit compilers prior to IRIX 6.1 operating system.
n32: The new 32-bit ABI generated by the MIPSpro 64-bit compiler (for a list of n32 features, see Chapter 1).

Compatibility
N32 Porting Guidelines
Porting Code to 64-Bit Silicon Graphics Systems

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