From: Clifford Wolf <clifford@clifford.at>
Date: Mon, 11 Nov 2019 14:07:29 +0000 (+0100)
Subject: Do not map $eq and $ne in cmp2lut, only proper arithmetic cmp
X-Git-Tag: working-ls180~969^2~1
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=362f4f9;p=yosys.git

Do not map $eq and $ne in cmp2lut, only proper arithmetic cmp

Signed-off-by: Clifford Wolf <clifford@clifford.at>
---

diff --git a/techlibs/common/cmp2lut.v b/techlibs/common/cmp2lut.v
index 0d0757767..1c8192b85 100644
--- a/techlibs/common/cmp2lut.v
+++ b/techlibs/common/cmp2lut.v
@@ -7,7 +7,7 @@
 // with n <= k inputs should be techmapped in this way, because this shortens the critical path
 // from n to 1 by avoiding carry chains.
 
-(* techmap_celltype = "$eq $ne $lt $le $gt $ge" *)
+(* techmap_celltype = "$lt $le $gt $ge" *)
 module _90_lut_cmp_ (A, B, Y);
 
 parameter A_SIGNED = 0;