From 686d514c31db32d3f56454ea5a620274afb4fd76 Mon Sep 17 00:00:00 2001
From: Sina Karvandi <sina@hyperdbg.org>
Date: Sun, 5 May 2024 21:34:45 +0900
Subject: [PATCH] add mux 4 to 1 one hot

---
 .../hwdbg/libs/mux/mux_4_to_1_onehot.scala    | 83 +++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/main/scala/hwdbg/libs/mux/mux_4_to_1_onehot.scala

diff --git a/src/main/scala/hwdbg/libs/mux/mux_4_to_1_onehot.scala b/src/main/scala/hwdbg/libs/mux/mux_4_to_1_onehot.scala
new file mode 100644
index 0000000..dfa9e0b
--- /dev/null
+++ b/src/main/scala/hwdbg/libs/mux/mux_4_to_1_onehot.scala
@@ -0,0 +1,83 @@
+/**
+ * @file
+ *   mux_4_to_1_onehot.scala
+ * @author
+ *   Sina Karvandi (sina@hyperdbg.org)
+ * @brief
+ *   Implementation of MUX 4 to 1 (One Hot)
+ * @details
+ * @version 0.1
+ * @date
+ *   2024-05-05
+ *
+ * @copyright
+ *   This project is released under the GNU Public License v3.
+ */
+package hwdbg.libs.mux
+
+import chisel3._
+import chisel3.util._
+
+import hwdbg.configs._
+
+class Mux4To1OneHot(
+    debug: Boolean = DebuggerConfigurations.ENABLE_DEBUG,
+    width: Int = 32
+) extends Module {
+
+  val io = IO(new Bundle {
+
+    val in0 = Input(UInt(width.W))
+    val in1 = Input(UInt(width.W))
+    val in2 = Input(UInt(width.W))
+    val in3 = Input(UInt(width.W))
+    val sel = Input(UInt(log2Ceil(width).W))
+    val out = Output(UInt(width.W))
+
+  })
+
+  io.out := Mux1H(io.sel, Seq(io.in0, io.in1, io.in2, io.in3))
+
+}
+
+object Mux4To1OneHot {
+
+  def apply(
+      debug: Boolean = DebuggerConfigurations.ENABLE_DEBUG,
+      width: Int = 32
+  )(
+      in0: UInt,
+      in1: UInt,
+      in2: UInt,
+      in3: UInt,
+      sel: UInt
+  ): (UInt) = {
+
+    val mux4To1OneHot = Module(
+      new Mux4To1OneHot(
+        debug
+      )
+    )
+
+    val out = Wire(UInt(width.W))
+
+    //
+    // Configure the input signals
+    //
+    mux4To1OneHot.io.in0 := in0
+    mux4To1OneHot.io.in1 := in1
+    mux4To1OneHot.io.in2 := in2
+    mux4To1OneHot.io.in3 := in3
+    mux4To1OneHot.io.sel := sel
+
+    //
+    // Configure the output signals
+    //
+    out := mux4To1OneHot.io.out
+
+    //
+    // Return the output result
+    //
+    out
+  }
+}