From 266c1ae1226656d90ee6416c214ef64fe8b5906f Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddie@fpgeh.com>
Date: Thu, 18 Jul 2019 15:38:09 -0700
Subject: [PATCH] synth_ice40 to decompose into 16x16

---
 techlibs/ice40/synth_ice40.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index 0474e76e9..66446deb7 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -265,8 +265,10 @@ struct SynthIce40Pass : public ScriptPass
 			run("techmap -map +/cmp2lut.v -D LUT_WIDTH=4");
 			run("opt_expr");
 			run("opt_clean");
-			if (help_mode || dsp)
+			if (help_mode || dsp) {
+				run("techmap -map +/mul2dsp.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 -D DSP_NAME=$__MUL16X16");
 				run("ice40_dsp", "(if -dsp)");
+			}
 			run("alumacc");
 			run("opt");
 			run("fsm");
-- 
2.30.2