From: Eddie Hung <eddie@fpgeh.com>
Date: Fri, 19 Jul 2019 18:41:00 +0000 (-0700)
Subject: Add DSP_MINWIDTH=11 for ice40 since ice40_dsp uses this threshold
X-Git-Tag: working-ls180~1039^2~319
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3dc3c749d5c7c10e1aa504f48794ef0a87513a82;p=yosys.git

Add DSP_MINWIDTH=11 for ice40 since ice40_dsp uses this threshold
---

diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index 5053e445d..77bd0ac81 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -266,7 +266,7 @@ struct SynthIce40Pass : public ScriptPass
 			run("opt_expr");
 			run("opt_clean");
 			if (help_mode || dsp) {
-				run("techmap -map +/mul2dsp.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 -D DSP_NAME=$__MUL16X16");
+				run("techmap -map +/mul2dsp.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 -D DSP_MINWIDTH=11 -D DSP_NAME=$__MUL16X16", "(if -dsp)");
 				run("ice40_dsp", "(if -dsp)");
 			}
 			run("alumacc");