Update synth_ice40 -device doc to be relevant for -abc9 only

diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index caef420d4fba6552b09e714e7db33064e114d7f7..9dd5d81f7cce839d800841447e5761030b9a7aee 100644 (file)
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -38,8 +38,8 @@ struct SynthIce40Pass : public ScriptPass
                log("This command runs synthesis for iCE40 FPGAs.\n");
                log("\n");
                log("    -device < hx | lp | u >\n");
-               log("        optimise the synthesis netlist for the specified device.\n");
-               log("        HX is the default target if no device argument specified.\n");
+               log("        relevant only for '-abc9' flow, optimise timing for the specified device.\n");
+               log("        default: hx\n");
                log("\n");
                log("    -top <module>\n");
                log("        use the specified module as top module\n");