3 files changed, 44 insertions, 5 deletions
diff --git a/techlibs/ice40/cells_sim.v b/techlibs/ice40/cells_sim.v
index 00843b97c..f9945b2b5 100644
--- a/techlibs/ice40/cells_sim.v
+++ b/techlibs/ice40/cells_sim.v
@@ -930,10 +930,21 @@ endmodule
 
 (* blackbox *)
 module SB_HFOSC(
+	input TRIM0,
+	input TRIM1,
+	input TRIM2,
+	input TRIM3,
+	input TRIM4,
+	input TRIM5,
+	input TRIM6,
+	input TRIM7,
+	input TRIM8,
+	input TRIM9,
 	input CLKHFPU,
 	input CLKHFEN,
 	output CLKHF
 );
+parameter TRIM_EN = "0b0";
 parameter CLKHF_DIV = "0b00";
 endmodule
 
@@ -963,6 +974,30 @@ parameter RGB2_CURRENT = "0b000000";
 endmodule
 
 (* blackbox *)
+module SB_LED_DRV_CUR(
+	input EN,
+	output LEDPU
+);
+endmodule
+
+(* blackbox *)
+module SB_RGB_DRV(
+	input RGBLEDEN,
+	input RGB0PWM,
+	input RGB1PWM,
+	input RGB2PWM,
+	input RGBPU,
+	output RGB0,
+	output RGB1,
+	output RGB2
+);
+parameter CURRENT_MODE = "0b0";
+parameter RGB0_CURRENT = "0b000000";
+parameter RGB1_CURRENT = "0b000000";
+parameter RGB2_CURRENT = "0b000000";
+endmodule
+
+(* blackbox *)
 module SB_I2C(
 	input  SBCLKI,
 	input  SBRWI,
diff --git a/techlibs/ice40/ice40_unlut.cc b/techlibs/ice40/ice40_unlut.cc
index 2428a8e78..d16e6e6a3 100644
--- a/techlibs/ice40/ice40_unlut.cc
+++ b/techlibs/ice40/ice40_unlut.cc
@@ -74,7 +74,7 @@ static void run_ice40_unlut(Module *module)
 }
 
 struct Ice40UnlutPass : public Pass {
-	Ice40UnlutPass() : Pass("ice40_unlut", "iCE40: perform simple optimizations") { }
+	Ice40UnlutPass() : Pass("ice40_unlut", "iCE40: transform SB_LUT4 cells to $lut cells") { }
 	void help() YS_OVERRIDE
 	{
 		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index 8899bfcc4..bb96d66d1 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -225,11 +225,13 @@ struct SynthIce40Pass : public ScriptPass
 			run("proc");
 		}
 
-		if (flatten && check_label("flatten", "(unless -noflatten)"))
+		if (check_label("flatten", "(unless -noflatten)"))
 		{
-			run("flatten");
-			run("tribuf -logic");
-			run("deminout");
+			if (flatten) {
+				run("flatten");
+				run("tribuf -logic");
+				run("deminout");
+			}
 		}
 
 		if (check_label("coarse"))
@@ -239,6 +241,8 @@ struct SynthIce40Pass : public ScriptPass
 			run("check");
 			run("opt");
 			run("wreduce");
+			run("peepopt");
+			run("opt_clean");
 			run("share");
 			run("techmap -map +/cmp2lut.v -D LUT_WIDTH=4");
 			run("opt_expr");