1 files changed, 51 insertions, 0 deletions
diff --git a/techlibs/gowin/cells_sim.v b/techlibs/gowin/cells_sim.v
new file mode 100644
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+++ b/techlibs/gowin/cells_sim.v
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+module LUT1(output F, input I0);
+  parameter [1:0] INIT = 0;
+  assign F = I0 ? INIT[1] : INIT[0];
+endmodule
+
+module LUT2(output F, input I0, I1);
+  parameter [3:0] INIT = 0;
+  wire [ 1: 0] s1 = I1 ? INIT[ 3: 2] : INIT[ 1: 0];
+  assign F = I0 ? s1[1] : s1[0];
+endmodule
+
+module LUT3(output F, input I0, I1, I2);
+  parameter [7:0] INIT = 0;
+  wire [ 3: 0] s2 = I2 ? INIT[ 7: 4] : INIT[ 3: 0];
+  wire [ 1: 0] s1 = I1 ?   s2[ 3: 2] :   s2[ 1: 0];
+  assign F = I0 ? s1[1] : s1[0];
+endmodule
+
+module LUT4(output F, input I0, I1, I2, I3);
+  parameter [15:0] INIT = 0;
+  wire [ 7: 0] s3 = I3 ? INIT[15: 8] : INIT[ 7: 0];
+  wire [ 3: 0] s2 = I2 ?   s3[ 7: 4] :   s3[ 3: 0];
+  wire [ 1: 0] s1 = I1 ?   s2[ 3: 2] :   s2[ 1: 0];
+  assign F = I0 ? s1[1] : s1[0];
+endmodule
+
+module DFF (output reg Q, input CLK, D);
+	always @(posedge C)
+		Q <= D;
+endmodule
+
+module DFFN (output reg Q, input CLK, D);
+	always @(negedge C)
+		Q <= D;
+endmodule
+
+module VCC(output V);
+  assign V = 1;
+endmodule
+
+module GND(output G);
+  assign G = 0;
+endmodule
+
+module IBUF(output O, input I);
+  assign O = I;
+endmodule
+
+module OBUF(output O, input I);
+  assign O = I;
+endmodule