diff --git a/src/main/scala/rocket/Instructions.scala b/src/main/scala/rocket/Instructions.scala
index da31c20a25b..f79388f64ad 100644
--- a/src/main/scala/rocket/Instructions.scala
+++ b/src/main/scala/rocket/Instructions.scala
@@ -85,12 +85,16 @@ object Instructions {
   def C_LUI              = BitPat("b????????????????011???????????01")
   def C_LW               = BitPat("b????????????????010???????????00")
   def C_LWSP             = BitPat("b????????????????010???????????10")
+  def C_MUL              = BitPat("b????????????????100111???10???01")
   def C_MV               = BitPat("b????????????????1000??????????10")
   def C_NOP              = BitPat("b????????????????000?00000?????01")
+  def C_NOT              = BitPat("b????????????????100111???1110101")
   def C_OR               = BitPat("b????????????????100011???10???01")
   def C_SB               = BitPat("b????????????????100010????????00")
   def C_SD               = BitPat("b????????????????111???????????00")
   def C_SDSP             = BitPat("b????????????????111???????????10")
+  def C_SEXT_B           = BitPat("b????????????????100111???1100101")
+  def C_SEXT_H           = BitPat("b????????????????100111???1101101")
   def C_SH               = BitPat("b????????????????100011???0????00")
   def C_SLLI             = BitPat("b????????????????000???????????10")
   def C_SRAI             = BitPat("b????????????????100?01????????01")
@@ -100,6 +104,9 @@ object Instructions {
   def C_SW               = BitPat("b????????????????110???????????00")
   def C_SWSP             = BitPat("b????????????????110???????????10")
   def C_XOR              = BitPat("b????????????????100011???01???01")
+  def C_ZEXT_B           = BitPat("b????????????????100111???1100001")
+  def C_ZEXT_H           = BitPat("b????????????????100111???1101001")
+  def C_ZEXT_W           = BitPat("b????????????????100111???1110001")
   def CBO_CLEAN          = BitPat("b000000000001?????010000000001111")
   def CBO_FLUSH          = BitPat("b000000000010?????010000000001111")
   def CBO_INVAL          = BitPat("b000000000000?????010000000001111")
@@ -1734,4 +1741,4 @@ object CSRs {
     res += mhpmcounter31h
     res.toArray
   }
-}
+}
\ No newline at end of file