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From: Kevin Diggs <kevdig@hypersurf.com>
To: linuxppc-dev@ozlabs.org
Subject: inline assembly
Date: Wed, 04 Jun 2008 12:36:14 -0700	[thread overview]
Message-ID: <4846EEAE.3000908@hypersurf.com> (raw)

Hi,

	When doing inline assembly, is there a way to get the compiler to 
assign "extra" (one not specified for inputs and outputs) registers? In 
the following:

                 __asm__ __volatile__ (
                         "addi 5,%1,-1\n"
                         "andc 5,%1,5\n"
                         "cntlzw 5,5\n"
                         "subfic %0,5,31":
                         "=r"(j):
                         "r"(i)
                 );

Can I get the compiler to choose a register for r5?

kevin

             reply	other threads:[~2008-06-04 19:38 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-04 19:36 Kevin Diggs [this message]
2008-06-04 19:45 ` inline assembly Scott Wood
2008-06-05 10:44   ` David Howells
2008-06-05 16:52     ` Scott Wood

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