From a44bbd3fe1088201401430079f8af52b207eece6 Mon Sep 17 00:00:00 2001
From: "Pavel V. Shatov (Meister)" <meisterpaul1@yandex.ru>
Date: Wed, 9 Aug 2017 16:13:45 +0300
Subject: Added 'modexpa7_' prefix to all the low-level modules in /src/rtl/pe/
 to prevent clashes with low-level modules in ECDSA multipliers.

We should consolidate all the lowel-level stuff across all the math cores in the future.
---
 src/rtl/pe/generic/modexpa7_adder32_generic.v | 69 +++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 src/rtl/pe/generic/modexpa7_adder32_generic.v

(limited to 'src/rtl/pe/generic/modexpa7_adder32_generic.v')

diff --git a/src/rtl/pe/generic/modexpa7_adder32_generic.v b/src/rtl/pe/generic/modexpa7_adder32_generic.v
new file mode 100644
index 0000000..8ecd292
--- /dev/null
+++ b/src/rtl/pe/generic/modexpa7_adder32_generic.v
@@ -0,0 +1,69 @@
+//------------------------------------------------------------------------------
+//
+// modexpa7_adder32_generic.v
+// -----------------------------------------------------------------------------
+// Generic 32-bit adder w/ clock enable.
+//
+// Authors: Pavel Shatov
+//
+// Copyright (c) 2016-2017, NORDUnet A/S
+//
+// 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_adder32_generic
+	(
+		input					clk,		// clock
+		input					ce,		// clock enable
+		input		[31: 0]	a,			// operand input
+		input		[31: 0]	b,			// operand input
+		output	[31: 0]	s,			// sum output
+		input					c_in,		// carry input
+		output				c_out		// carry output
+	);
+	
+		//
+		// Sum
+		//
+	reg	[32: 0]	s_int;
+	
+	always @(posedge clk)
+		if (ce) s_int <= {1'b0, a} + {1'b0, b} + {{32{1'b0}}, c_in};
+		
+		//
+		// Output
+		//
+	assign s = s_int[31:0];
+	assign c_out = s_int[32];
+	
+		
+endmodule
+
+//------------------------------------------------------------------------------
+// End-of-File
+//------------------------------------------------------------------------------
-- 
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