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This is a fairly complete i860 assembler which is compatible with the
UNIX System V/860 Release 4 assembler. However, it does not currently
support SVR4 PIC (i.e., @GOT, @GOTOFF, @PLT).
Like the SVR4/860 assembler, the output object format is ELF32. Currently, this is the only supported object format. If there is sufficient interest, other formats such as COFF may be implemented.
Both the Intel and AT&T/SVR4 syntaxes are supported, with the latter
being the default. One difference is that AT&T syntax requires the '%'
prefix on register names while Intel syntax does not. Another difference
is in the specification of relocatable expressions. The Intel syntax
is ha%expression whereas the SVR4 syntax is [expression]@ha
(and similarly for the "l" and "h" selectors).