Jeremy Kerr wrote:
Hi Kevin,
/*
* Turn r3 (range) into a rotate count for the selected
range. * 0 -> 23, 1 -> 31
*/
__asm__ __volatile__ ( "slwi %0,%0,3\n"
"addi %0,%0,23\n"
"rlwnm %0,%1,%0,30,31\n":
"=r"(ret):
"r"(config),"0"(range)
);
Wouldn't this be much simpler in plain C?
I just knew someone was gonna try to rain on my rlwnm'in fun parade!
Wonder if the C code can be made to compile down to 3 instructions?
However, if you really do need to do this in inline asm, you can use
the "b" modifier rather than "r" to avoid using r0.
Oh cool! Thanks! You to Ben!
Cheers,
Jeremy
kevin
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