1 files changed, 63 insertions, 0 deletions
diff --git a/src/rtl/pe/modexpa7_pe_add.v b/src/rtl/pe/modexpa7_pe_add.v
new file mode 100644
index 0000000..9cde591
--- /dev/null
+++ b/src/rtl/pe/modexpa7_pe_add.v
@@ -0,0 +1,63 @@
+//======================================================================
+//
+// modexpa7_pe_add.v
+// -----------------------------------------------------------------------------
+// Low-level processing element (adder).
+//
+// Authors: Pavel Shatov
+//
+// Copyright (c) 2017, NORDUnet A/S All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// - Redistributions of source code must retain the above copyright
+//   notice, this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright
+//   notice, this list of conditions and the following disclaimer in the
+//   documentation and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+//   be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//======================================================================
+
+module modexpa7_pe_add
+	(
+		input					clk,
+		input					ce,
+		input		[31: 0]	a,
+		input		[31: 0]	b,
+		input					c_in,
+		output	[31: 0]	s,
+		output				c_out
+	);
+	
+	reg	[32: 0]	s_reg;
+	
+	assign s			= s_reg[31: 0];
+	assign c_out	= s_reg[32];
+	
+	always @(posedge clk)
+		//
+		if (ce) s_reg <= {1'b0, a} + {1'b0, b} + {32'd0, c_in};
+
+endmodule
+
+//======================================================================
+// End of file
+//======================================================================