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specifier on operand in asm inline
- From: Mihail Platonov <dofg at ya dot ru>
- To: gcc-help at gcc dot gnu dot org
- Date: Wed, 10 Oct 2007 05:54:42 -0700 (PDT)
- Subject: specifier on operand in asm inline
hi.
the function described ( http://www.nabble.com/file/p13135052/t.c t.c ) is
from linux sources, sparc dependent headers.
what is the semantics of "r" specifier in subx operand (%r2)?
and what is the meaning of connection between this specifier and "J"
constraint?
__asm__ __volatile__ (
...
"subx %r2,%3,%%g1\n\t"
: "=&r" ((USItype)(r1)),
"=&r" ((USItype)(r0))
: "%rJ" ((USItype)(x3)),
"rI" ((USItype)(y3)),
...
thnx for answers.
with best regards,
mihail
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