ip: add ip_fp_inv

1 files changed, 36 insertions, 0 deletions

diff --git a/rtl/gfx/fp_inv.sv b/rtl/gfx/fp_inv.sv
new file mode 100644
index 0000000..d2bebdc
--- /dev/null
+++ b/rtl/gfx/fp_inv.sv
@@ -0,0 +1,36 @@
+`include "gfx/gfx_defs.sv"
+
+module fp_inv
+(
+	input  logic clk,
+
+	input  fp    a,
+	input  logic stall,
+
+	output fp    q
+);
+
+`ifndef VERILATOR
+	ip_fp_inv ip_inv
+	(
+		.en(!stall),
+		.areset(0),
+		.*
+	);
+`else
+	fp pipeline[`FP_INV_STAGES - 1];
+
+	integer i;
+
+	always_ff @(posedge clk)
+		if (!stall) begin
+			pipeline[0] <= a;
+
+			for (i = 1; i < `FP_INV_STAGES - 1; ++i)
+				pipeline[i] <= pipeline[i - 1];
+
+			q <= $c("taller::fp_inv(", pipeline[`FP_INV_STAGES - 2], ")");
+		end
+`endif
+
+endmodule