[U-Boot] ppc 85xx inline assembly

[Scott Wood]

On Fri, Apr 17, 2009 at 05:13:06PM -0700, Qingyu Song wrote:
> Hello,
> I am trying to understand the inline assembly function out_be32
> 
> extern inline void out_be32(volatile unsigned __iomem *addr, int val)
> {
>     __asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r"
> (val));
> }
> 
> I am not familiar with the syntax here, especially for the %U0%X0 part, can
> someone help me to translate this into assemble code?

%U0%X0 tells GCC to add the "u" or "x" suffixes to the instruction as
needed by operand 0.

-Scott