diff --git a/t1/src/decoder/attribute/fmaUOP.scala b/t1/src/decoder/attribute/fmaUOP.scala
new file mode 100644
index 000000000..8cbbaad69
--- /dev/null
+++ b/t1/src/decoder/attribute/fmaUOP.scala
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2022 Jiuyang Liu <liu@jiuyang.me>
+
+package org.chipsalliance.t1.rtl.decoder.attribute
+
+import org.chipsalliance.t1.rtl.decoder.T1DecodePattern
+
+trait FMAUopType extends Uop
+object FMAT0 extends FMAUopType
+object FMAT1 extends FMAUopType
+object FMAT2 extends FMAUopType
+object FMAT3 extends FMAUopType
+object FMAT4 extends FMAUopType
+object FMAT5 extends FMAUopType
+object FMAT6 extends FMAUopType
+object FMAT7 extends FMAUopType
+object FMAT8 extends FMAUopType
+object FMADC extends FMAUopType
+
+object fmaUOP {
+  def apply(t1DecodePattern: T1DecodePattern): fmaUOP = {
+    Seq(
+      t0 _ -> FMAT0,
+      t1 _ -> FMAT1,
+      t2 _ -> FMAT2,
+      t3 _ -> FMAT3,
+      t4 _ -> FMAT4,
+      t5 _ -> FMAT5,
+      t6 _ -> FMAT6,
+      t7 _ -> FMAT7,
+      t8 _ -> FMAT8,
+      dc _ -> FMADC,
+    ).collectFirst {
+      case (fn, tpe) if fn(t1DecodePattern) => fmaUOP(tpe)
+    }.get
+
+  }
+  def t0(t1DecodePattern: T1DecodePattern): Boolean = {
+    val allMatched: Seq[String] = Seq(
+      "vfadd",
+      "vfmacc",
+      "vfmul",
+      "vfredosum",
+      "vfredusum"
+    )
+    allMatched.contains(t1DecodePattern.instruction.name)
+  }
+  def t1(t1DecodePattern: T1DecodePattern): Boolean = ???
+  def t2(t1DecodePattern: T1DecodePattern): Boolean = ???
+  def t3(t1DecodePattern: T1DecodePattern): Boolean = ???
+  def t4(t1DecodePattern: T1DecodePattern): Boolean = ???
+  def t5(t1DecodePattern: T1DecodePattern): Boolean = ???
+  def t6(t1DecodePattern: T1DecodePattern): Boolean = ???
+  def t7(t1DecodePattern: T1DecodePattern): Boolean = ???
+  def t8(t1DecodePattern: T1DecodePattern): Boolean = ???
+  def dc(t1DecodePattern: T1DecodePattern): Boolean = ???
+}
+
+case class fmaUOP(value: FMAUopType) extends UopDecodeAttribute[FMAUopType] {
+  override val description: String = "Some Thing"
+}
\ No newline at end of file