Added sincos test case

tests/simple/sincos.v

@@ -0,0 +1,124 @@
+// File: design.v
+// Generated by MyHDL 0.8
+// Date: Tue Dec  3 04:33:14 2013
+
+
+module d (
+    cos_z0,
+    sin_z0,
+    done,
+    z0,
+    start,
+    clock,
+    reset
+);
+// Sine and cosine computer.
+//
+// This module computes the sine and cosine of an input angle. The
+// floating point numbers are represented as integers by scaling them
+// up with a factor corresponding to the number of bits after the point.
+//
+// Ports:
+// -----
+// cos_z0: cosine of the input angle
+// sin_z0: sine of the input angle
+// done: output flag indicated completion of the computation
+// z0: input angle
+// start: input that starts the computation on a posedge
+// clock: clock input
+// reset: reset input
+
+output signed [19:0] cos_z0;
+reg signed [19:0] cos_z0;
+output signed [19:0] sin_z0;
+reg signed [19:0] sin_z0;
+output done;
+reg done;
+input signed [19:0] z0;
+input start;
+input clock;
+input reset;
+
+(* gentb_constant="0" *)
+wire reset;
+
+always @(posedge clock, posedge reset) begin: DESIGN_PROCESSOR
+    reg [5-1:0] i;
+    reg [1-1:0] state;
+    reg signed [20-1:0] dz;
+    reg signed [20-1:0] dx;
+    reg signed [20-1:0] dy;
+    reg signed [20-1:0] y;
+    reg signed [20-1:0] x;
+    reg signed [20-1:0] z;
+    if (reset) begin
+        state = 1'b0;
+        cos_z0 <= 1;
+        sin_z0 <= 0;
+        done <= 1'b0;
+        x = 0;
+        y = 0;
+        z = 0;
+        i = 0;
+    end
+    else begin
+        case (state)
+            1'b0: begin
+                if (start) begin
+                    x = 159188;
+                    y = 0;
+                    z = z0;
+                    i = 0;
+                    done <= 1'b0;
+                    state = 1'b1;
+                end
+            end
+            1'b1: begin
+                dx = $signed(y >>> $signed({1'b0, i}));
+                dy = $signed(x >>> $signed({1'b0, i}));
+                case (i)
+                    0: dz = 205887;
+                    1: dz = 121542;
+                    2: dz = 64220;
+                    3: dz = 32599;
+                    4: dz = 16363;
+                    5: dz = 8189;
+                    6: dz = 4096;
+                    7: dz = 2048;
+                    8: dz = 1024;
+                    9: dz = 512;
+                    10: dz = 256;
+                    11: dz = 128;
+                    12: dz = 64;
+                    13: dz = 32;
+                    14: dz = 16;
+                    15: dz = 8;
+                    16: dz = 4;
+                    17: dz = 2;
+                    default: dz = 1;
+                endcase
+                if ((z >= 0)) begin
+                    x = x - dx;
+                    y = y + dy;
+                    z = z - dz;
+                end
+                else begin
+                    x = x + dx;
+                    y = y - dy;
+                    z = z + dz;
+                end
+                if ((i == (19 - 1))) begin
+                    cos_z0 <= x;
+                    sin_z0 <= y;
+                    state = 1'b0;
+                    done <= 1'b1;
+                end
+                else begin
+                    i = i + 1;
+                end
+            end
+        endcase
+    end
+end
+
+endmodule