This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: commutative asm operands

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~
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]