From: Clifford Wolf <clifford@clifford.at>
Date: Sun, 20 Jul 2014 18:45:01 +0000 (+0200)
Subject: Added yet another resource sharing test case
X-Git-Tag: yosys-0.4~514
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8836943693dcd6fc6e6b74141ca8c89e9b8c1f0e;p=yosys.git

Added yet another resource sharing test case
---

diff --git a/tests/sat/share.v b/tests/sat/share.v
new file mode 100644
index 000000000..e06fc8f1e
--- /dev/null
+++ b/tests/sat/share.v
@@ -0,0 +1,32 @@
+module test_1(
+	input [7:0] a, b, c,
+	input s, x,
+	output [7:0] y1, y2
+);
+	wire [7:0] t1, t2;
+	assign t1 = s ? a*b : 0, t2 = !s ? b*c : 0;
+	assign y1 = x ? t2 : t1, y2 = x ? t1 : t2;
+endmodule
+
+
+module test_2(
+	input s,
+	input [7:0] a, b, c,
+	output reg [7:0] y
+);
+	always @* begin
+		y <= 'bx;
+		if (s) begin
+			if (a * b > 8)
+				y <= b / c;
+			else
+				y <= c / b;
+		end else begin
+			if (b * c > 8)
+				y <= a / b;
+			else
+				y <= b / a;
+		end
+	end
+endmodule
+
diff --git a/tests/sat/share.ys b/tests/sat/share.ys
new file mode 100644
index 000000000..f2f5d649d
--- /dev/null
+++ b/tests/sat/share.ys
@@ -0,0 +1,17 @@
+read_verilog share.v
+proc;;
+
+copy test_1 gold_1
+copy test_2 gold_2
+share test_1 test_2;;
+
+select -assert-count 1 test_1/t:$mul
+select -assert-count 1 test_2/t:$mul
+select -assert-count 1 test_2/t:$div
+
+miter -equiv -flatten -make_outputs -make_outcmp gold_1 test_1 miter_1
+sat -verify -prove trigger 0 -show-inputs -show-outputs miter_1
+
+miter -equiv -flatten -make_outputs -make_outcmp gold_2 test_2 miter_2
+sat -verify -prove trigger 0 -show-inputs -show-outputs miter_2
+