[PATCH] [AArch64] Add v8.1a atomic instructions

[Tim Northover]

Hi Vladimir,

One more comment...


REPOSITORY
  rL LLVM

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Comment at: lib/Target/AArch64/AArch64InstrFormats.td:8670
@@ +8669,3 @@
+                        "cas" # order # size, "\t$Rs, $Rt, [$Rn]",
+                        "$out = $Rt",[]> {
+  let NP = 1;
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Arnold's pointed out to me that it probably should be Rs that gets written here. CASP seems to be right though.

http://reviews.llvm.org/D8501

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