hdl.ast: add Value.xor, mapping to $reduce_xor.

Fixes #147.
2019-09-13 14:28:43 +00:00 · 2019-09-13 14:28:43 +00:00 · 32310aecad
commit 32310aecad
parent b23a9794a4
4 changed files with 23 additions and 0 deletions
--- a/nmigen/hdl/ast.py
+++ b/nmigen/hdl/ast.py
@ -157,6 +157,16 @@ class Value(metaclass=ABCMeta):
        """
        return Operator("r&", [self])

+    def xor(self):
+        """Compute pairwise exclusive-or of every bit.
+
+        Returns
+        -------
+        Value, out
+            ``1`` if an odd number of bits are set, ``0`` if an even number of bits are set.
+        """
+        return Operator("r^", [self])
+
    def implies(premise, conclusion):
        """Implication.