asimd: Prevent misdecodes from occurring

Pointed out by Mary when reviewing the shift code.

src/frontend/A32/decoder/asimd.h

@@ -8,6 +8,7 @@
 #include <algorithm>
 #include <functional>
 #include <optional>
+#include <set>
 #include <vector>
 
 #include "common/bit_util.h"
@@ -35,6 +36,15 @@ std::vector<ASIMDMatcher<V>> GetASIMDDecodeTable() {
         return Common::BitCount(matcher1.GetMask()) > Common::BitCount(matcher2.GetMask());
     });
 
+    // Exceptions to the above rule of thumb.
+    const std::set<std::string> comes_first{
+        "VBIC, VMOV, VMVN, VORR (immediate)"
+    };
+
+    std::stable_partition(table.begin(), table.end(), [&](const auto& matcher) {
+        return comes_first.count(matcher.GetName()) > 0;
+    });
+
     return table;
 }