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Machine Dependent Features

The machine instruction sets are (almost by definition) different on each machine where as runs. Floating point representations vary as well, and as often supports a few additional directives or command-line options for compatibility with other assemblers on a particular platform. Finally, some versions of as support special pseudo-instructions for branch optimization. For details on particular architectures, see the hardware manufacturer’s manual.

The following documentation discusses the assembler directives and machine dependent features regarding the following supported architectures.

as00090000.gif VAX (see VAX Dependent Features)

as00090000.gif AMD 29K (see AMD 29K Dependent Features)

as00090000.gif Hitachi H8/300 (see H8/300 Dependent Features)

as00090000.gif Hitachi H8/500 (see H8/500 Dependent Features)

as00090000.gif HPPA (see HPPA Dependent Features)

as00090000.gif Hitachi SH (see Hitachi SH Dependent Features)

as00090000.gif Intel i960 (see Intel 960 Dependent Features)

as00090000.gif Motorola M68K (see M680x0 Dependent Features)

as00090000.gif SPARC (see SPARC Dependent Features)

as00090000.gif 80386 (see 80386 Dependent Features)

as00090000.gif Z8000 (see Z8000 Dependent Features)

as00090000.gif MIPS (see MIPS Dependent Features)