From: Eddie Hung <eddie@fpgeh.com>
Date: Fri, 30 Aug 2019 19:22:14 +0000 (-0700)
Subject: Do not restrict multiplier to unsigned
X-Git-Tag: working-ls180~956^2~38^2~1
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c1459bc748d0d2c47dcb2366e5a0893736d6d463;p=yosys.git

Do not restrict multiplier to unsigned
---

diff --git a/passes/pmgen/ice40_dsp.cc b/passes/pmgen/ice40_dsp.cc
index 39d033a04..16bfe537f 100644
--- a/passes/pmgen/ice40_dsp.cc
+++ b/passes/pmgen/ice40_dsp.cc
@@ -64,11 +64,6 @@ void create_ice40_dsp(ice40_dsp_pm &pm)
 
 	bool mul_signed = st.mul->getParam("\\A_SIGNED").as_bool();
 
-	if (mul_signed) {
-		log("  inference of signed iCE40 DSP arithmetic is currently not supported.\n");
-		return;
-	}
-
 	log("  replacing $mul with SB_MAC16 cell.\n");
 
 	Cell *cell = pm.module->addCell(NEW_ID, "\\SB_MAC16");