From: whitequark <whitequark@whitequark.org>
Date: Tue, 22 Jan 2019 07:03:46 +0000 (+0000)
Subject: lib.fifo: in FIFOInterface.read(), check readable on the right cycle.
X-Git-Tag: working~49
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1782b841b27e5d0ec13e8ed9d0825d50fd97e513;p=nmigen.git

lib.fifo: in FIFOInterface.read(), check readable on the right cycle.
---

diff --git a/nmigen/lib/fifo.py b/nmigen/lib/fifo.py
index e26d3d4..6e8e679 100644
--- a/nmigen/lib/fifo.py
+++ b/nmigen/lib/fifo.py
@@ -72,9 +72,9 @@ class FIFOInterface:
 
     def read(self):
         """Read method for simulation."""
-        assert (yield self.readable)
         yield self.re.eq(1)
         yield
+        assert (yield self.readable)
         value = (yield self.dout)
         yield self.re.eq(0)
         return value