Merge V8 5.3.332.45.  DO NOT MERGE

Test: Manual

FPIIM-449

Change-Id: Id3254828b068abdea3cb10442e0172a8c9a98e03
(cherry picked from commit 13e2dadd00298019ed862f2b2fc5068bba730bcf)
diff --git a/src/compiler/x87/instruction-codes-x87.h b/src/compiler/x87/instruction-codes-x87.h
index 0cf9f35..2b4be3e 100644
--- a/src/compiler/x87/instruction-codes-x87.h
+++ b/src/compiler/x87/instruction-codes-x87.h
@@ -80,6 +80,7 @@
   V(X87Float64Sqrt)                \
   V(X87Float64Round)               \
   V(X87Float64Cmp)                 \
+  V(X87Float64SilenceNaN)          \
   V(X87Movsxbl)                    \
   V(X87Movzxbl)                    \
   V(X87Movb)                       \