From 3487b95224d175d997e701430fca95d0cc51b269 Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Sun, 15 Sep 2019 09:37:16 +0200
Subject: Added simulation models for Efinix and Anlogic

---
 techlibs/anlogic/cells_sim.v | 80 +++++++++++++++++++++++++++++++++++++++++++-
 techlibs/efinix/cells_sim.v  | 64 +++++++++++++++++++++++++++++++++--
 2 files changed, 141 insertions(+), 3 deletions(-)

diff --git a/techlibs/anlogic/cells_sim.v b/techlibs/anlogic/cells_sim.v
index 058e76605..652de3b26 100644
--- a/techlibs/anlogic/cells_sim.v
+++ b/techlibs/anlogic/cells_sim.v
@@ -1,5 +1,5 @@
 module AL_MAP_SEQ (
-	output q,
+	output reg q,
 	input ce,
 	input clk,
 	input sr,
@@ -9,6 +9,70 @@ module AL_MAP_SEQ (
 	parameter REGSET = "RESET"; //RESET/SET
 	parameter SRMUX = "SR"; //SR/INV
 	parameter SRMODE = "SYNC"; //SYNC/ASYNC
+
+	wire clk_ce;
+	assign clk_ce = ce ? clk : 1'b0;
+
+	wire srmux;
+	generate
+		case (SRMUX)
+			"SR": assign srmux = sr;
+			"INV": assign srmux = ~sr;
+			default: assign srmux = sr;
+		endcase
+	endgenerate	
+
+	wire regset;
+	generate
+		case (REGSET)
+			"RESET": assign regset = 1'b0;
+			"SET": assign regset = 1'b1;
+			default: assign regset = 1'b0;
+		endcase
+	endgenerate
+
+	initial q = regset;
+
+	generate
+   		if (DFFMODE == "FF") 
+		begin
+			if (SRMODE == "ASYNC") 
+			begin
+				always @(posedge clk_ce, posedge srmux)
+					if (srmux)
+						q <= regset;
+					else 
+						q <= d;	
+			end 
+			else
+			begin
+				always @(posedge clk_ce)
+					if (srmux)
+						q <= regset;
+					else 
+						q <= d;	
+			end
+		end
+		else
+		begin
+			if (SRMODE == "ASYNC") 
+			begin
+				always @(clk_ce, srmux)
+					if (srmux)
+						q <= regset;
+					else 
+						q <= d;	
+			end 
+			else
+			begin
+				always @(clk_ce)
+					if (srmux)
+						q <= regset;
+					else 
+						q <= d;	
+			end
+		end
+    endgenerate
 endmodule
 
 module AL_MAP_LUT1 (
@@ -100,4 +164,18 @@ module AL_MAP_ADDER (
   output [1:0] o
 );
 	parameter ALUTYPE = "ADD";
+
+	generate
+		case (ALUTYPE)
+			"ADD": 		 assign o = a + b + c;
+			"SUB": 		 assign o = a - b - c;
+			"A_LE_B":    assign o = a - b - c;
+
+			"ADD_CARRY":    assign o = {  a, 1'b0 };
+			"SUB_CARRY":    assign o = { ~a, 1'b0 };
+			"A_LE_B_CARRY": assign o = {  a, 1'b0 };
+			default: assign o = a + b + c;
+		endcase
+	endgenerate	
+
 endmodule
diff --git a/techlibs/efinix/cells_sim.v b/techlibs/efinix/cells_sim.v
index 8c8f6afaa..a41ff1a35 100644
--- a/techlibs/efinix/cells_sim.v
+++ b/techlibs/efinix/cells_sim.v
@@ -6,6 +6,7 @@ module EFX_LUT4(
    input I3
 );
    parameter LUTMASK  = 16'h0000;
+	assign O = LUTMASK >> {I3, I2, I1, I0};   
 endmodule
 
 module EFX_ADD(
@@ -17,10 +18,18 @@ module EFX_ADD(
 );
    parameter I0_POLARITY   = 1;
    parameter I1_POLARITY   = 1;
+
+   wire i0;
+   wire i1;
+
+   assign i0 = I0_POLARITY ? I0 : ~I0;
+   assign i1 = I1_POLARITY ? I1 : ~I1;
+
+   assign {CO, O} = i0 + i1 + CI;
 endmodule
 
 module EFX_FF(
-   output Q,
+   output reg Q,
    input D,
    input CE,
    input CLK,
@@ -33,6 +42,51 @@ module EFX_FF(
    parameter SR_VALUE = 0;
    parameter SR_SYNC_PRIORITY = 0;
    parameter D_POLARITY = 1;
+
+   wire clk;
+   wire ce;
+   wire sr;
+   wire d;
+   wire prio;
+   wire sync;
+   wire async;
+
+   assign clk = CLK_POLARITY ? CLK : ~CLK;
+   assign ce = CE_POLARITY ? CE : ~CE;
+   assign sr = SR_POLARITY ? SR : ~SR;
+   assign d = D_POLARITY ? D : ~D;
+  
+   generate
+   	if (SR_SYNC == 1) 
+      begin
+         if (SR_SYNC_PRIORITY == 1) 
+         begin
+            always @(posedge clk)
+               if (sr)
+                  Q <= SR_VALUE;
+               else if (ce)
+                  Q <= d;
+         end
+         else
+         begin
+            always @(posedge clk)
+               if (ce)
+                  if (sr)
+                     Q <= SR_VALUE;
+                  else
+                     Q <= d;            
+         end
+      end
+      else
+      begin
+         always @(posedge clk or posedge sr)
+            if (sr)
+               Q <= SR_VALUE;
+            else if (ce)
+               Q <= d;
+         
+      end
+   endgenerate
 endmodule
 
 module EFX_GBUFCE(
@@ -41,6 +95,12 @@ module EFX_GBUFCE(
    output O
 );
    parameter CE_POLARITY = 1'b1;
+
+   wire ce;
+   assign ce = CE_POLARITY ? CE : ~CE;
+   
+   assign O = I & ce;
+   
 endmodule
 
 module EFX_RAM_5K(
@@ -104,4 +164,4 @@ module EFX_RAM_5K(
 			    (WRITE_WIDTH == 10) ? 9 :  // 512x10
 			    (WRITE_WIDTH == 5)  ? 10 : -1; // 1024x5
    
-endmodule
\ No newline at end of file
+endmodule
-- 
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