Add support for FRINT{32,64}{x,z} variants.

Change-Id: Id0c7936968d65ec94f43782cfa00f2702ddc29d3
diff --git a/src/cpu-features.h b/src/cpu-features.h
index cd82d3c..5e1bb26 100644
--- a/src/cpu-features.h
+++ b/src/cpu-features.h
@@ -102,7 +102,9 @@
   /* Flag manipulation instructions: {AX,XA}FLAG                            */ \
   V(kAXFlag,              "AXFlag",                 NULL)                      \
   /* Random number generation extension,                                    */ \
-  V(kRNG,                 "RNG",                    NULL)
+  V(kRNG,                 "RNG",                    NULL)                      \
+  /* Floating-point round to {32,64}-bit integer.                           */ \
+  V(kFrintToFixedSizedInt,"Frint (bounded)",        NULL)
 // clang-format on