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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.
VAX (see VAX Dependent Features)
AMD 29K (see
AMD 29K Dependent Features)
Hitachi H8/300 (see
H8/300 Dependent Features)
Hitachi H8/500 (see
H8/500 Dependent Features)
HPPA (see
HPPA Dependent Features)
Hitachi SH (see
Hitachi SH Dependent Features)
Intel i960 (see
Intel 960 Dependent Features)
Motorola M68K (see
M680x0 Dependent Features)
SPARC (see
SPARC Dependent Features)
80386 (see
80386 Dependent Features)
Z8000 (see
Z8000 Dependent Features)
MIPS (see
MIPS Dependent Features)