Index: src/cmd/internal/obj/x86/aenum.go
--- src/cmd/internal/obj/x86/aenum.go.orig
+++ src/cmd/internal/obj/x86/aenum.go
@@ -201,6 +201,7 @@ const (
 	ADECL
 	ADECQ
 	ADECW
+	ADEFERRET
 	ADIVB
 	ADIVL
 	ADIVPD
@@ -212,6 +213,7 @@ const (
 	ADPPD
 	ADPPS
 	AEMMS
+	AENDBR64
 	AENTER
 	AEXTRACTPS
 	AF2XM1
