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The Sparc version of as supports the following additional
machine directives:
.align.common"bss". This behaves somewhat like .comm, but the
syntax is different.
.half.short.
.nword.nword directive produces native word sized value,
ie. if assembling with -32 it is equivalent to .word, if assembling
with -64 it is equivalent to .xword.
.proc.register#scratch,
it is a scratch register, if it is #ignore, it just suppresses any
errors about using undeclared global register, but does not emit any
information about it into the object file. This can be useful e.g. if you
save the register before use and restore it after.
.reserve"bss". This behaves somewhat like .lcomm, but the
syntax is different.
.seg"text", "data", or
"data1". It behaves like .text, .data, or
.data 1.
.skip.space directive.
.word.word directive produces 32 bit values,
instead of the 16 bit values it produces on many other machines.
.xword.xword directive produces
64 bit values.