From f36524e388b060b1bb535ae21cb1bcbbea220be9 Mon Sep 17 00:00:00 2001
From: ducky
Date: Fri, 20 May 2016 18:09:57 -0700
Subject: Rename packages to lowercase chisel, add compatibility layer

---
 src/main/scala/chisel/util/CircuitMath.scala | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/main/scala/chisel/util/CircuitMath.scala

(limited to 'src/main/scala/chisel/util/CircuitMath.scala')

diff --git a/src/main/scala/chisel/util/CircuitMath.scala b/src/main/scala/chisel/util/CircuitMath.scala
new file mode 100644
index 00000000..001be802
--- /dev/null
+++ b/src/main/scala/chisel/util/CircuitMath.scala
@@ -0,0 +1,26 @@
+// See LICENSE for license details.
+
+/** Circuit-land math operations.
+  */
+
+package chisel
+
+/** Compute Log2 with truncation of a UInt in hardware using a Mux Tree
+  * An alternative interpretation is it computes the minimum number of bits needed to represent x
+  * @example
+  * {{{ data_out := Log2(data_in) }}}
+  * @note Truncation is used so Log2(UInt(12412)) = 13*/
+object Log2 {
+  /** Compute the Log2 on the least significant n bits of x */
+  def apply(x: Bits, width: Int): UInt = {
+    if (width < 2) {
+      UInt(0)
+    } else if (width == 2) {
+      x(1)
+    } else {
+      Mux(x(width-1), UInt(width-1), apply(x, width-1))
+    }
+  }
+
+  def apply(x: Bits): UInt = apply(x, x.getWidth)
+}
-- 
cgit v1.2.3


From 881ac3cb3a9da0c7827a161238468df4727996f0 Mon Sep 17 00:00:00 2001
From: ducky
Date: Fri, 27 May 2016 13:24:36 -0700
Subject: Move utils into utils

---
 src/main/scala/chisel/util/CircuitMath.scala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/main/scala/chisel/util/CircuitMath.scala')

diff --git a/src/main/scala/chisel/util/CircuitMath.scala b/src/main/scala/chisel/util/CircuitMath.scala
index 001be802..c3b94fdb 100644
--- a/src/main/scala/chisel/util/CircuitMath.scala
+++ b/src/main/scala/chisel/util/CircuitMath.scala
@@ -3,7 +3,9 @@
 /** Circuit-land math operations.
   */
 
-package chisel
+package chisel.util
+
+import chisel._
 
 /** Compute Log2 with truncation of a UInt in hardware using a Mux Tree
   * An alternative interpretation is it computes the minimum number of bits needed to represent x
-- 
cgit v1.2.3