[M3commit] CVS Update: cm3

[Antony Hosking]

CVSROOT:	/usr/cvs
Changes by:	hosking at birch.	10/09/25 03:43:34

Modified files:
	cm3/m3-sys/m3cc/gcc/gcc/m3cg/: parse.c 

Log message:
	Redefine compare_exchange to allow for a better match with the
	Atomic.CompareSwap semantics, which allows return of the actual value with
	failure.
	(cf. Intel x86 cmpxchg)