Hi:

I need to read some hardware special purpose registers that can only accessed using assembly instructions. Would anyone 
have some code snippets that would illustrate doing this. I do have some example macros taken from the IPL code that 
look like the following:

#define set_dcr(dcr,val) 					\
		__asm__ __volatile__( 				\
			".ifdef PPC_CPUOP_ENABLED;"		\
			".cpu 403;"						\
			".endif;"						\
			"mtdcr %0,%1" 					\
			: : "i" (dcr), "r" (val) )

But 1) I need to embed several instructions and 2) not clear on the above syntax .

thanks

PS

Here is the assembly I"m trying to embed

loop:
  mftbu Rx
  mftb Ry
  mftbu Rz
  cmpw Rz, Rx
  bne loop

Note I realize I'll have to find some vacant registers to use for Rx, Ry and Rz