Don't use OP_NOP for zero-delay subtraction

[soc.git] / src / soc / experiment / alu_hier.py

diff --git a/src/soc/experiment/alu_hier.py b/src/soc/experiment/alu_hier.py
index 49b0db62b6f5c3417b17069a473508e533d298f0..39a4be95c5d75e688045f268d64f91abc032eb1b 100644 (file)
--- a/src/soc/experiment/alu_hier.py
+++ b/src/soc/experiment/alu_hier.py
@@ -468,7 +468,7 @@ def alu_sim(dut):
 
     # test zero-delay ALU
     # don't have OP_SUB, so use any other
-    result = yield from run_op(dut, 5, 3, MicrOp.OP_NOP)
+    result = yield from run_op(dut, 5, 3, MicrOp.OP_CMP)
     print("alu_sim sub", result)
     assert (result == 2)