From: Eddie Hung <eddie@fpgeh.com>
Date: Thu, 18 Jul 2019 22:38:09 +0000 (-0700)
Subject: synth_ice40 to decompose into 16x16
X-Git-Tag: working-ls180~1039^2~332
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=266c1ae1226656d90ee6416c214ef64fe8b5906f;p=yosys.git

synth_ice40 to decompose into 16x16
---

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");