From: Johann Glaser <Johann.Glaser@gmx.at>
Date: Mon, 18 Mar 2013 21:06:16 +0000 (+0100)
Subject: added one more suggestion to optimize MUXes in pass "opt_const"
X-Git-Tag: yosys-0.2.0~711^2~4
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=69674652c5eafab7f96bcdab7618d57630ab0ae7;p=yosys.git

added one more suggestion to optimize MUXes in pass "opt_const"
---

diff --git a/passes/opt/opt_const.cc b/passes/opt/opt_const.cc
index 909500967..5b87aeaa2 100644
--- a/passes/opt/opt_const.cc
+++ b/passes/opt/opt_const.cc
@@ -125,6 +125,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module)
 			if (input.match("  1")) ACTION_DO("\\Y", input.extract(1, 1));
 #ifdef MUX_UNDEF_SEL_TO_UNDEF_RESULTS
 			if (input.match("01 ")) ACTION_DO("\\Y", input.extract(0, 1));
+			// TODO: "10 " -> replace with "!S" gate
 			// TODO: "0  " -> replace with "B AND S" gate
 			// TODO: " 1 " -> replace with "A OR S" gate
 			// TODO: "1  " -> replace with "B OR !S" gate