From: Eddie Hung <eddie@fpgeh.com>
Date: Fri, 26 Jul 2019 17:27:30 +0000 (-0700)
Subject: Pop the CO bit from O
X-Git-Tag: working-ls180~1039^2~294
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4c25d1a76fc006cac0d9e2038617f41ca90685c1;p=yosys.git

Pop the CO bit from O
---

diff --git a/passes/pmgen/ice40_dsp.cc b/passes/pmgen/ice40_dsp.cc
index c5655ad20..369cb211e 100644
--- a/passes/pmgen/ice40_dsp.cc
+++ b/passes/pmgen/ice40_dsp.cc
@@ -144,8 +144,10 @@ void create_ice40_dsp(ice40_dsp_pm &pm)
 	// SB_MAC16 Output Interface
 
 	SigSpec O = st.sigO;
-	if (GetSize(O) == 33)
+	if (GetSize(O) == 33) {
 		cell->setPort("\\CO", st.sigO[32]);
+		O.remove(32);
+	}
 	else {
 		log_assert(GetSize(O) <= 32);
 		cell->setPort("\\CO", pm.module->addWire(NEW_ID));