From 0c19b435013edcda864097c99f06be3605559097 Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Mon, 8 Sep 2025 18:14:09 +0200
Subject: [PATCH] do not use diagonal pips

---
 himbaechel/uarch/gatemate/gatemate.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/himbaechel/uarch/gatemate/gatemate.cc b/himbaechel/uarch/gatemate/gatemate.cc
index e724886b..d827e925 100644
--- a/himbaechel/uarch/gatemate/gatemate.cc
+++ b/himbaechel/uarch/gatemate/gatemate.cc
@@ -299,6 +299,8 @@ bool GateMateImpl::checkPipAvail(PipId pip) const
         return true;
     if (used_cpes[pip.tile])
         return false;
+    if (extra_data.type != PipExtra::PIP_EXTRA_MUX || (extra_data.flags & MUX_DIAGONAL) == 0)
+        return false;
     return true;
 }