From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Thu, 13 Aug 2020 12:59:48 +0000 (+0100)
Subject: plenty of time to wait for operand, so use "sync" in MultiCompUnit
X-Git-Tag: semi_working_ecp5~377
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b72ff402742d959e4f77581e54fd7de3e09a06f3;p=soc.git

plenty of time to wait for operand, so use "sync" in MultiCompUnit
---

diff --git a/src/soc/experiment/compalu_multi.py b/src/soc/experiment/compalu_multi.py
index 514dc3fa..428e1b09 100644
--- a/src/soc/experiment/compalu_multi.py
+++ b/src/soc/experiment/compalu_multi.py
@@ -285,8 +285,8 @@ class MultiCompUnit(RegSpecALUAPI, Elaboratable):
         # a regfile port because this particular output is not valid"
         m.d.comb += self.wrmask.eq(Cat(*wrok))
 
-        # pass the operation to the ALU
-        m.d.comb += self.get_op().eq(oper_r)
+        # pass operation to the ALU (sync because time to wait for src reads)
+        m.d.sync += self.get_op().eq(oper_r)
 
         # create list of src/alu-src/src-latch.  override 1st and 2nd one below.
         # in the case, for ALU and Logical pipelines, we assume RB is the