From nobody Mon Feb 9 19:55:16 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 16540881874865.323050665229289; Wed, 1 Jun 2022 05:56:27 -0700 (PDT) Received: from localhost ([::1]:36438 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nwNtg-0007ty-UT for importer@patchew.org; Wed, 01 Jun 2022 08:56:25 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53086) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nwNrV-0006wJ-JM; Wed, 01 Jun 2022 08:54:09 -0400 Received: from [187.72.171.209] (port=1454 helo=outlook.eldorado.org.br) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nwNrT-0002Yx-Ro; Wed, 01 Jun 2022 08:54:09 -0400 Received: from p9ibm ([10.10.71.235]) by outlook.eldorado.org.br over TLS secured channel with Microsoft SMTPSVC(8.5.9600.16384); Wed, 1 Jun 2022 09:54:00 -0300 Received: from eldorado.org.br (unknown [10.10.70.45]) by p9ibm (Postfix) with ESMTP id CCD8780006A; Wed, 1 Jun 2022 09:53:59 -0300 (-03) From: matheus.ferst@eldorado.org.br To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Cc: clg@kaod.org, danielhb413@gmail.com, david@gibson.dropbear.id.au, groug@kaod.org, richard.henderson@linaro.org, Matheus Ferst Subject: [PATCH] target/ppc: fix vbpermd in big endian hosts Date: Wed, 1 Jun 2022 09:53:55 -0300 Message-Id: <20220601125355.1266165-1-matheus.ferst@eldorado.org.br> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-OriginalArrivalTime: 01 Jun 2022 12:54:00.0056 (UTC) FILETIME=[A9CAAF80:01D875B6] X-Host-Lookup-Failed: Reverse DNS lookup failed for 187.72.171.209 (failed) Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=187.72.171.209; envelope-from=matheus.ferst@eldorado.org.br; helo=outlook.eldorado.org.br X-Spam_score_int: -4 X-Spam_score: -0.5 X-Spam_bar: / X-Spam_report: (-0.5 / 5.0 requ) BAYES_00=-1.9, PDS_HP_HELO_NORDNS=0.659, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1654088190260100001 Content-Type: text/plain; charset="utf-8" From: Matheus Ferst The extract64 arguments are not endian dependent as they are only used for bitwise operations. The current behavior in little-endian hosts is correct; since the indexes in VRB are in PowerISA-ordering, we should always invert the value before calling extract64. Also, using the VsrD macro, we can have a single EXTRACT_BIT definition for big and little-endian with the correct behavior. Signed-off-by: Matheus Ferst Reviewed-by: Richard Henderson --- Found this bug while refactoring VECTOR_FOR_INORDER_I uses. The complete patch series will also use Vsr[DB] instead of VBPERM[DQ]_INDEX, but it will need more testing. For now, we're just changing what is necessary to fix the instruction. --- target/ppc/int_helper.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/target/ppc/int_helper.c b/target/ppc/int_helper.c index 105b626d1b..4c5d3f03f8 100644 --- a/target/ppc/int_helper.c +++ b/target/ppc/int_helper.c @@ -1307,14 +1307,13 @@ XXGENPCV(XXGENPCVDM, 8) #define VBPERMQ_INDEX(avr, i) ((avr)->u8[(i)]) #define VBPERMD_INDEX(i) (i) #define VBPERMQ_DW(index) (((index) & 0x40) !=3D 0) -#define EXTRACT_BIT(avr, i, index) (extract64((avr)->u64[i], index, 1)) #else #define VBPERMQ_INDEX(avr, i) ((avr)->u8[15 - (i)]) #define VBPERMD_INDEX(i) (1 - i) #define VBPERMQ_DW(index) (((index) & 0x40) =3D=3D 0) -#define EXTRACT_BIT(avr, i, index) \ - (extract64((avr)->u64[1 - i], 63 - index, 1)) #endif +#define EXTRACT_BIT(avr, i, index) \ + (extract64((avr)->VsrD(i), 63 - index, 1)) =20 void helper_vbpermd(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b) { --=20 2.25.1