From: Eddie Hung <eddie@fpgeh.com>
Date: Thu, 6 Feb 2020 16:46:38 +0000 (-0800)
Subject: cmp2lcu: fail if `LUT_WIDTH < 2
X-Git-Tag: working-ls180~695^2~1
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7b09a20c0cc737c3d108c9e981f5989d2ba1423c;p=yosys.git

cmp2lcu: fail if `LUT_WIDTH < 2
---

diff --git a/techlibs/common/cmp2lcu.v b/techlibs/common/cmp2lcu.v
index b302d592f..b4fadaaad 100644
--- a/techlibs/common/cmp2lcu.v
+++ b/techlibs/common/cmp2lcu.v
@@ -19,7 +19,7 @@ output [Y_WIDTH-1:0] Y;
 parameter _TECHMAP_CELLTYPE_ = "";
 
 generate
-    if (_TECHMAP_CELLTYPE_ == "")
+    if (_TECHMAP_CELLTYPE_ == "" || `LUT_WIDTH < 2)
         wire _TECHMAP_FAIL_ = 1;
     else if (_TECHMAP_CELLTYPE_ == "$lt") begin
         // Transform $lt into $gt by swapping A and B