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The GNU C Compiler uses the assembler `as’ as a backend. This
assembler uses AT&T syntax. Here is a brief overview of the syntax.
For more information about `as’, look in the system info
documentation.

- as uses the form;

nemonic source, destination (opposite to intel syntax)

- as prefixes registers with `%’, and prefixes numeric constants
with `$’.

- Effective addresses use the following general syntax;

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