[libre-riscv-dev] [Bug 267] The efficiency of adder/subtractor

diff --git a/4c/554c19ae5347ca3980cec206af0b1f2b227b13 b/4c/554c19ae5347ca3980cec206af0b1f2b227b13
new file mode 100644 (file)
index 0000000..7ba68e8
--- /dev/null
+++ b/4c/554c19ae5347ca3980cec206af0b1f2b227b13
@@ -0,0 +1,77 @@
+Return-path: <libre-riscv-dev-bounces@lists.libre-riscv.org>
+Envelope-to: publicinbox@libre-riscv.org
+Delivery-date: Thu, 26 Mar 2020 23:10:09 +0000
+Received: from localhost ([::1] helo=libre-riscv.org)
+       by libre-riscv.org with esmtp (Exim 4.89)
+       (envelope-from <libre-riscv-dev-bounces@lists.libre-riscv.org>)
+       id 1jHbdY-0006jG-CJ; Thu, 26 Mar 2020 23:10:08 +0000
+Received: from localhost ([127.0.0.1] helo=bugs.libre-riscv.org)
+ by libre-riscv.org with esmtp (Exim 4.89)
+ (envelope-from <bugzilla-daemon@libre-riscv.org>) id 1jHbdW-0006j6-Tp
+ for libre-riscv-dev@lists.libre-riscv.org; Thu, 26 Mar 2020 23:10:06 +0000
+From: bugzilla-daemon@libre-riscv.org
+To: libre-riscv-dev@lists.libre-riscv.org
+Date: Thu, 26 Mar 2020 23:10:07 +0000
+X-Bugzilla-Reason: CC
+X-Bugzilla-Type: changed
+X-Bugzilla-Watch-Reason: None
+X-Bugzilla-Product: Libre-SOC's first SoC
+X-Bugzilla-Component: ALU (including IEEE754 16/32/64-bit FPU)
+X-Bugzilla-Version: unspecified
+X-Bugzilla-Keywords: 
+X-Bugzilla-Severity: enhancement
+X-Bugzilla-Who: lkcl@lkcl.net
+X-Bugzilla-Status: CONFIRMED
+X-Bugzilla-Resolution: 
+X-Bugzilla-Priority: ---
+X-Bugzilla-Assigned-To: lkcl@lkcl.net
+X-Bugzilla-Flags: 
+X-Bugzilla-Changed-Fields: 
+Message-ID: <bug-267-13-VjjJk21Mdy@http.bugs.libre-riscv.org/>
+In-Reply-To: <bug-267-13@http.bugs.libre-riscv.org/>
+References: <bug-267-13@http.bugs.libre-riscv.org/>
+X-Bugzilla-URL: http://bugs.libre-riscv.org/
+Auto-Submitted: auto-generated
+MIME-Version: 1.0
+Subject: [libre-riscv-dev] [Bug 267] The efficiency of adder/subtractor
+X-BeenThere: libre-riscv-dev@lists.libre-riscv.org
+X-Mailman-Version: 2.1.23
+Precedence: list
+List-Id: Libre-RISCV General Development
+ <libre-riscv-dev.lists.libre-riscv.org>
+List-Unsubscribe: <http://lists.libre-riscv.org/mailman/options/libre-riscv-dev>, 
+ <mailto:libre-riscv-dev-request@lists.libre-riscv.org?subject=unsubscribe>
+List-Archive: <http://lists.libre-riscv.org/pipermail/libre-riscv-dev/>
+List-Post: <mailto:libre-riscv-dev@lists.libre-riscv.org>
+List-Help: <mailto:libre-riscv-dev-request@lists.libre-riscv.org?subject=help>
+List-Subscribe: <http://lists.libre-riscv.org/mailman/listinfo/libre-riscv-dev>, 
+ <mailto:libre-riscv-dev-request@lists.libre-riscv.org?subject=subscribe>
+Reply-To: Libre-RISCV General Development
+ <libre-riscv-dev@lists.libre-riscv.org>
+Content-Type: text/plain; charset="utf-8"
+Content-Transfer-Encoding: base64
+Errors-To: libre-riscv-dev-bounces@lists.libre-riscv.org
+Sender: "libre-riscv-dev" <libre-riscv-dev-bounces@lists.libre-riscv.org>
+
+aHR0cDovL2J1Z3MubGlicmUtcmlzY3Yub3JnL3Nob3dfYnVnLmNnaT9pZD0yNjcKCi0tLSBDb21t
+ZW50ICMxIGZyb20gTHVrZSBLZW5uZXRoIENhc3NvbiBMZWlnaHRvbiA8bGtjbEBsa2NsLm5ldD4g
+LS0tCihJbiByZXBseSB0byBKb2NrIFRhbm5lciBmcm9tIGNvbW1lbnQgIzApCgo+IEFjdHVhbGx5
+IEkgd2FzIHRoaW5raW5nIGFib3V0IHdoYXQgSGFycmlzJkhhcnJpcyBzdWdnZXN0ZWQgaW4gdGhl
+aXIgZmFtb3VzCj4gYm9vay4gWW91IGp1c3QgaGF2ZSB0byBoYXZlIGFuIGludmVydGVyIG9uIG9u
+ZSBvcGVyYW5kIGlucHV0IG9mIGFuIGFkZGVyLgo+IFRoZSB0d28ncyBjb21wbGVtZW50IG9mIHRo
+YXQgb3BlcmFuZCBjYW4gYmUgYWNoaWV2ZWQgdmlhIHRoZSBjYXJyeSBpbnB1dC4KCnllcywgaW50
+ZXJlc3RpbmdseSwgbWljaGFlbCBhbmQgaSBhcmUgcmV2aWV3aW5nIGluIHRoZSBzaW11bGF0b3Is
+IHZhcmlvdXMKaW1wbGVtZW50YXRpb25zIChtaWNyb3dhdHQsIHFlbXUsIHBlYXJfcGMpLCB0aGV5
+IGFsbCBzZWVtIHRvIGRvIHRoaXMKaHR0cDovL2J1Z3MubGlicmUtcmlzY3Yub3JnL3Nob3dfYnVn
+LmNnaT9pZD0xODYjYzEzMAoKaXQgbG9va3MgbGlrZSBwb3dlciB3YXMgZXh0cmVtZWx5IHdlbGwg
+ZGVzaWduZWQsIGFuZCBtaWNyb3dhdHQgYXMgd2VsbCwKdG8gYmFzaWNhbGx5ICJ0cmFuc2xhdGUi
+IG9wY29kZXMgaW50byAiZXZlcnl0aGluZyBpcyBhbiBBREQsIGJ1dCB5b3UKb3B0aW9uYWxseSBk
+byBhZGQxLCBhZGQwLCBhZGQtY2FycnksIG9jY2FzaW9uYWxseSBpbnZlcnQgb3AxLApvaCBhbmQg
+ZmFybSBvdXQgY2FycnkgdG8gZGlmZmVyZW50IHBsYWNlcywgb3Igc2V0IGNhcnJ5IHRvIDAsIG9y
+IDEiIGV0Yy4gZXRjLgoKaXQncyBxdWl0ZSBuZWF0LgoKLS0gCllvdSBhcmUgcmVjZWl2aW5nIHRo
+aXMgbWFpbCBiZWNhdXNlOgpZb3UgYXJlIG9uIHRoZSBDQyBsaXN0IGZvciB0aGUgYnVnLgpfX19f
+X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaWJyZS1yaXNjdi1k
+ZXYgbWFpbGluZyBsaXN0CmxpYnJlLXJpc2N2LWRldkBsaXN0cy5saWJyZS1yaXNjdi5vcmcKaHR0
+cDovL2xpc3RzLmxpYnJlLXJpc2N2Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpYnJlLXJpc2N2LWRl
+dgo=
+