20 Apr
2009
20 Apr
'09
5:23 p.m.
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