[libre-riscv-dev] [Bug 336] ALU CompUnit needs to recognise that RA (src1) can be...

diff --git a/4b/d4e989ccf493d0279bf2a3fed12bf9843cfe54 b/4b/d4e989ccf493d0279bf2a3fed12bf9843cfe54
new file mode 100644 (file)
index 0000000..8f360f8
--- /dev/null
+++ b/4b/d4e989ccf493d0279bf2a3fed12bf9843cfe54
@@ -0,0 +1,96 @@
+Return-path: <libre-riscv-dev-bounces@lists.libre-riscv.org>
+Envelope-to: publicinbox@libre-riscv.org
+Delivery-date: Sat, 06 Jun 2020 21:53:08 +0100
+Received: from localhost ([::1] helo=libre-riscv.org)
+       by libre-soc.org with esmtp (Exim 4.89)
+       (envelope-from <libre-riscv-dev-bounces@lists.libre-riscv.org>)
+       id 1jhfoR-0004Rh-D0; Sat, 06 Jun 2020 21:53:07 +0100
+Received: from localhost ([127.0.0.1] helo=bugs.libre-soc.org)
+ by libre-soc.org with esmtp (Exim 4.89)
+ (envelope-from <bugzilla-daemon@libre-soc.org>) id 1jhfoP-0004RW-Cr
+ for libre-riscv-dev@lists.libre-riscv.org; Sat, 06 Jun 2020 21:53:05 +0100
+From: bugzilla-daemon@libre-soc.org
+To: libre-riscv-dev@lists.libre-riscv.org
+Date: Sat, 06 Jun 2020 20:53:05 +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: Source Code
+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: cestrauss@gmail.com
+X-Bugzilla-Flags: 
+X-Bugzilla-Changed-Fields: 
+Message-ID: <bug-336-13-hdgf7Oi2fz@https.bugs.libre-soc.org/>
+In-Reply-To: <bug-336-13@https.bugs.libre-soc.org/>
+References: <bug-336-13@https.bugs.libre-soc.org/>
+X-Bugzilla-URL: https://bugs.libre-soc.org/
+Auto-Submitted: auto-generated
+MIME-Version: 1.0
+Subject: [libre-riscv-dev] [Bug 336] ALU CompUnit needs to recognise that RA
+ (src1) can be zero
+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>
+
+aHR0cHM6Ly9idWdzLmxpYnJlLXNvYy5vcmcvc2hvd19idWcuY2dpP2lkPTMzNgoKLS0tIENvbW1l
+bnQgIzUwIGZyb20gTHVrZSBLZW5uZXRoIENhc3NvbiBMZWlnaHRvbiA8bGtjbEBsa2NsLm5ldD4g
+LS0tCihJbiByZXBseSB0byBDZXNhciBTdHJhdXNzIGZyb20gY29tbWVudCAjNDkpCj4gSSdtIGFk
+dmFuY2luZyBvbiB0aGUgQUxVIENvbXBVbml0IHBhcmFsbGVsIHVuaXQgdGVzdC4gSGF2aW5nIGdv
+bmUgcGFzdCB0aGUKPiByZCByZWwvZ28gaW50ZXJmYWNlLCBJJ3ZlIG1vdmVkIG9uIHRvIHRoZSBB
+TFUgaW5wdXQgaW50ZXJmYWNlLgo+IAo+IFRoZSBBTFUgaW5wdXQgaW50ZXJmYWNlIHVzZXMgYSB2
+YWxpZC9yZWFkeSBwcm90b2NvbC4gSSBhc3N1bWUgdGhhdCB0aGlzLAo+IGxpa2UgcmVsL2dvLCBp
+cyBzaW1pbGFyIHRvIHRoZSB3aXNoYm9uZSBpbnRlcmZhY2UuCgpzdGFuZGFyZCB3aXNoYm9uZSAv
+IEFYSTQgeWVzLiAgdGhlIGRpZmZlcmVuY2UgYmVpbmcgdGhhdCByZWwvZ28gd2lsbCBORVZFUiBi
+ZQpiYWNrIHRvIGJhY2sgKG11bHRpcGxlIHRyYW5zYWN0aW9ucyBvbmUgYWZ0ZXIgdGhlIG90aGVy
+KSBob3dldmVyIHJlYWR5L3ZhbGlkCmNhbiBiZS4KCmhvd2V2ZXIgaW4gdGhlIE11bHRpQ29tcFVu
+aXRzIGl0IGlzIG5ldmVyIHVzZWQgZm9yIHRoYXQsIGJlY2F1c2UgTUNVIGlzIHNpbmdsZQp0cmFu
+c2FjdGlvbiBvbmx5LgoKPiBBcyBzdWNoOgo+IAo+IDEpIFRoZSBwb3J0IGlzIGlkbGUgd2hlbiB2
+YWxpZF9vIGFuZCByZWFkeV9pIGFyZSBib3RoIHplcm8uCj4gMikgSWYgdmFsaWRfbyBpcyBoaWdo
+IGJ1dCByZWFkeV9pIGlzIGxvdywgd2UgaGF2ZSBhIHdhaXQgc3RhdGUuCj4gMykgV2hlbiBib3Ro
+IGFyZSBoaWdoLCB3ZSBoYXZlIGEgZGF0YSB0cmFuc2ZlciwgYW5kIHRoZSB0cmFuc2FjdGlvbiBl
+bmRzLgoKb3IsIHRha2VzIHBsYWNlIG9uIHRoYXQgY2xvY2sgY3ljbGUsIGFiZCBlbmRzICJhcyBm
+YXIgYXMgdGhlIG5leHQgY2xvY2sgY3ljbGUKaXMgY29uY2VybmVkIi4KCj4gNCkgSXQgaXMgaWxs
+ZWdhbCB0byBrZWVwIHJlYWR5X2kgaGlnaCB3aGVuIHZhbGlkX28gaXMgbG93LgoKPiBUaGlzIGlz
+IHN1cHBvc2VkIHRvIGNvdmVyIGEgc2luZ2xlIHRyYW5zYWN0aW9uLCBidXQgaW4gbXkgdW5kZXN0
+YW5kaW5nIEkgc2VlCj4gNSBhY2tub2xvd2RnZWQgYmFjay10by1iYWNrIHRyYW5zYWN0aW9ucyBm
+b2xsb3dlZCBieSBhIGlsbGVnYWwgc3RhdGUuCgp0aGlzIGRvZXMgbm90IHN1cnByaXNlIG1lLiAg
+dGhlIGFsdV9oaWVyLnB5IEFMVXMgd2VyZSB3cml0dGVuICJpbiBhIGh1cnJ5IiBhbmQKYXJlIHRo
+ZXJlIHB1cmVseSBmb3IgdGVzdCBwdXJwb3NlcyBvbmx5LgoKCj4gQ2FuIEkgZ28gYWhlYWQgYW5k
+IGZpeCBhbGwgdGhlc2UgY2FzZXMsIHRvIGJlIG1vcmUgbGlrZSB3aXNoYm9uZT8gT3IsIGlzIG15
+Cj4gYXNzdW1wdGlvbiBvZiB3aXNoYm9uZSBsaWtlbmVzcyB3cm9uZz8KCnllcyBwbGVhc2UgZG8u
+Li4KCm9yLi4uCgpsYXN0IHdlZWsgaSBjb25zaWRlcmVkIHRocm93aW5nIHRoZW0gb3V0IGFuZCB1
+c2luZyBubXV0aWwuc2luZ2xlcGlwZSBBTFVzCmluc3RlYWQuCgppZiB5b3UgZmVlbCBpdCBkb2Vz
+IG5vdCB0YWtlIGEgbG9uZyB0aW1lIHRvICJmaXgiIGFsdV9oaWVyLnB5IEFMVSBjbGFzc2VzCnBs
+ZWFzZSBkbyBnbyBhaGVhZC4KCm90aGVyd2lzZSBpZiBpdCB3aWxsIHRha2UgYSBsb25nIHRpbWUg
+aXQgd291bGQgYmUgYmV0dGVyIHRvIGRyb3AgdGhlbSBhbmQKcmVwbGFjZSB0aGVtIHdpdGggQUxV
+cyBiYXNlZCBvbiBlLmcuIFRlc3RCdWZQaXBlIChzZWUgbm11dGlsIHVuaXQgdGVzdHMpCgphZ2Fp
+bjogdGhleSBhcmUgb25seSB0aGVyZSBmb3IgdGVzdCBwdXJwb3NlcywgaG93ZXZlciBhcyB0ZXN0
+cyBpdCBpcyBpbmRlZWQKZ29vZCBmb3IgdGhlbSB0byBwcm9wZXJseSBjb25mb3JtIHRvIHRoZSBy
+ZXF1aXJlZCBBUEkKCi0tIApZb3UgYXJlIHJlY2VpdmluZyB0aGlzIG1haWwgYmVjYXVzZToKWW91
+IGFyZSBvbiB0aGUgQ0MgbGlzdCBmb3IgdGhlIGJ1Zy4KX19fX19fX19fX19fX19fX19fX19fX19f
+X19fX19fX19fX19fX19fX19fX19fX18KbGlicmUtcmlzY3YtZGV2IG1haWxpbmcgbGlzdApsaWJy
+ZS1yaXNjdi1kZXZAbGlzdHMubGlicmUtcmlzY3Yub3JnCmh0dHA6Ly9saXN0cy5saWJyZS1yaXNj
+di5vcmcvbWFpbG1hbi9saXN0aW5mby9saWJyZS1yaXNjdi1kZXYK
+