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List:       gcc
Subject:    Re: commutative asm operands
From:       Richard Henderson <rth () redhat ! com>
Date:       2002-07-31 22:48:04
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On Wed, Jul 31, 2002 at 11:44:25PM +0930, Alan Modra wrote:
> I was forwarded a testcase today containing some horrible asm
> 
> asm ("addc %0, %2, %3\n\t"
>      "adde %1, %4, %5"
>      : "=r" (lo), "=r" (hi)
>      : "%r" (__lo), "0" (lo), "%r" (__hi), "1" (hi))
> 
> Note the use of "%" with "0"/"1" in the next operand.  Is this legal?

Dunno.  The x86 port does this the other way around -- puts 
the % with the matching constraint.  I.e.

  : "%0" (lo), "r"(__lo)


r~
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