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gas: documentation for the SPARC %dN and %qN fp registers notation

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gas/ChangeLog:

2015-12-10  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* doc/c-sparc.texi (Sparc-Regs): Document the %dN and %qN notation
	for floating-point registers.
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Jose E. Marchesi
2015-12-10 11:01:35 -05:00
parent c2c2a31fdb
commit 7039122d13
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gas/doc/c-sparc.texi
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@ -253,6 +253,14 @@ can only be accessed as double or quad, and thus only even
or quad numbered accesses are allowed. For example, @samp{%f34}
is a legal floating point register, but @samp{%f35} is not.
Floating point registers accessed as double can also be referred using
the @samp{%d@var{n}} notation, where @var{n} is even. Similarly,
floating point registers accessed as quad can be referred using the
@samp{%q@var{n}} notation, where @var{n} is a multiple of 4. For
example, @samp{%f4} can be denoted as both @samp{%d4} and @samp{%q4}.
On the other hand, @samp{%f2} can be denoted as @samp{%d2} but not as
@samp{%q2}.
Certain V9 instructions allow access to ancillary state registers.
Most simply they can be referred to as @samp{%asr@var{n}} where
@var{n} can be from 16 to 31. However, there are some aliases