AArch64: Fix quick compiler monitor implementation.

Also with some small fixes :
1. Enable some dex byte code to compile.
2. Copy the register definition from runtime.cc.
3. A quick fix for "cmp Wn, Wm" in the assembler.
4. Optimise GenMoveException a bit by using xzr.
5. Fix improper use of StoreValueWide() on 32-bit value in FlushIns().
6. Fix one debug assert in the assembler.
It can pass all cases in run-all-test, except 044 which also fails with
the interpreter.

Change-Id: I9cc0253f1039c78d5100640235ac33e884b02560
diff --git a/compiler/dex/quick/arm64/assemble_arm64.cc b/compiler/dex/quick/arm64/assemble_arm64.cc
index 8accd0a..93caf89 100644
--- a/compiler/dex/quick/arm64/assemble_arm64.cc
+++ b/compiler/dex/quick/arm64/assemble_arm64.cc
@@ -176,7 +176,7 @@
                  kFmtRegROrSp, 9, 5, kFmtBitBlt, 21, 10, kFmtBitBlt, 23, 22,
                  kFmtUnused, -1, -1, IS_TERTIARY_OP | REG_USE0 | SETS_CCODES,
                  "cmn", "!0R, #!1d!2T", kFixupNone),
-    ENCODING_MAP(WIDE(kA64Cmp3Rro), SF_VARIANTS(0x6b20001f),
+    ENCODING_MAP(WIDE(kA64Cmp3Rro), SF_VARIANTS(0x6b00001f),
                  kFmtRegROrSp, 9, 5, kFmtRegR, 20, 16, kFmtShift, -1, -1,
                  kFmtUnused, -1, -1, IS_TERTIARY_OP | REG_USE01 | SETS_CCODES,
                  "cmp", "!0R, !1r!2o", kFixupNone),
@@ -637,7 +637,7 @@
               }
 
               // Now check that the requirements are satisfied.
-              RegStorage reg(operand);
+              RegStorage reg(operand | RegStorage::kValid);
               const char *expected = nullptr;
               if (want_float) {
                 if (!reg.IsFloat()) {