From nobody Mon Feb 9 21:12:01 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1560943049; cv=none; d=zoho.com; s=zohoarc; b=JbPJ+DR11rNZKGEeaDe5s8kGh2BD6xbkMh2YU1ktD0ciRsG/RRcRxKrNwQXupCp+qSxIXWJiTs/QaqeaoO6UhLYTHu6ygqKLmSzx0tPiu1w7AuGFcCXHAxi46/JHgOhwV2GsN/pLBXJz7acnmAU7AmRImadKjxreNk9qk6fw5nk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1560943049; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=7ERlqBhceY2CD2guWsVLavK3cWntMtENWYFLYbPlIVM=; b=J3eE/oTAPeoGs4zYCroqu/lfv33s9Ef/aJKosecq2wDjULYT+k2iMLdr5ZbeMaWMWMZMNbNd2x3mmktko9g+zcIIo+HMrUSLQ26ZZXnIswhLkjsUVWJOYzBpdT5fSKXSt94M9OVKLBbRFwLwY5qOmRqUueoe0uZ+75srke99ugA= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.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 156094304940350.03671301686279; Wed, 19 Jun 2019 04:17:29 -0700 (PDT) Received: from localhost ([::1]:36986 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdYaf-000328-Au for importer@patchew.org; Wed, 19 Jun 2019 07:17:21 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36365) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdYOl-0002D0-8G for qemu-devel@nongnu.org; Wed, 19 Jun 2019 07:05:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hdYOj-0006Rw-NO for qemu-devel@nongnu.org; Wed, 19 Jun 2019 07:05:03 -0400 Received: from mx2.rt-rk.com ([89.216.37.149]:59479 helo=mail.rt-rk.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hdYOj-0006Lq-Bm for qemu-devel@nongnu.org; Wed, 19 Jun 2019 07:05:01 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 7D2BB1A4740; Wed, 19 Jun 2019 13:03:55 +0200 (CEST) Received: from rtrkw870-lin.domain.local (rtrkw870-lin.domain.local [10.10.13.132]) by mail.rt-rk.com (Postfix) with ESMTPSA id 5F2B51A4579; Wed, 19 Jun 2019 13:03:55 +0200 (CEST) X-Virus-Scanned: amavisd-new at rt-rk.com From: Stefan Brankovic To: qemu-devel@nongnu.org Date: Wed, 19 Jun 2019 13:03:43 +0200 Message-Id: <1560942225-24728-7-git-send-email-stefan.brankovic@rt-rk.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1560942225-24728-1-git-send-email-stefan.brankovic@rt-rk.com> References: <1560942225-24728-1-git-send-email-stefan.brankovic@rt-rk.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 89.216.37.149 Subject: [Qemu-devel] [PATCH 6/8] target/ppc: Optimize emulation of vclzw instruction X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Optimize Altivec instruction vclzw (Vector Count Leading Zeros Word). This instruction counts the number of leading zeros of each word element in source register and places result in the appropriate word element of destination register. Counting is to be performed in four iterations of for loop(one for each word elemnt of source register vB). Every iteration consists of loading appropriate word element from source register, counting leading zeros with tcg_gen_clzi_i32, and saving the result in appropriate word element of destination register. Signed-off-by: Stefan Brankovic Reviewed-by: Richard Henderson --- target/ppc/helper.h | 1 - target/ppc/int_helper.c | 3 --- target/ppc/translate/vmx-impl.inc.c | 28 +++++++++++++++++++++++++++- 3 files changed, 27 insertions(+), 5 deletions(-) diff --git a/target/ppc/helper.h b/target/ppc/helper.h index 3b92e3b..595241c 100644 --- a/target/ppc/helper.h +++ b/target/ppc/helper.h @@ -305,7 +305,6 @@ DEF_HELPER_4(vctsxs, void, env, avr, avr, i32) =20 DEF_HELPER_2(vclzb, void, avr, avr) DEF_HELPER_2(vclzh, void, avr, avr) -DEF_HELPER_2(vclzw, void, avr, avr) DEF_HELPER_2(vctzb, void, avr, avr) DEF_HELPER_2(vctzh, void, avr, avr) DEF_HELPER_2(vctzw, void, avr, avr) diff --git a/target/ppc/int_helper.c b/target/ppc/int_helper.c index 3134798..82cb12e 100644 --- a/target/ppc/int_helper.c +++ b/target/ppc/int_helper.c @@ -1802,15 +1802,12 @@ VUPK(lsw, s64, s32, UPKLO) =20 #define clzb(v) ((v) ? clz32((uint32_t)(v) << 24) : 8) #define clzh(v) ((v) ? clz32((uint32_t)(v) << 16) : 16) -#define clzw(v) clz32((v)) =20 VGENERIC_DO(clzb, u8) VGENERIC_DO(clzh, u16) -VGENERIC_DO(clzw, u32) =20 #undef clzb #undef clzh -#undef clzw =20 #define ctzb(v) ((v) ? ctz32(v) : 8) #define ctzh(v) ((v) ? ctz32(v) : 16) diff --git a/target/ppc/translate/vmx-impl.inc.c b/target/ppc/translate/vmx= -impl.inc.c index c5bebfb..2588a9e 100644 --- a/target/ppc/translate/vmx-impl.inc.c +++ b/target/ppc/translate/vmx-impl.inc.c @@ -831,6 +831,32 @@ static void trans_vgbbd(DisasContext *ctx) } =20 /* + * vclzw VRT,VRB - Vector Count Leading Zeros Word + * + * Counting the number of leading zero bits of each word element in source + * register and placing result in appropriate word element of destination + * register. + */ +static void trans_vclzw(DisasContext *ctx) +{ + int VT =3D rD(ctx->opcode); + int VB =3D rB(ctx->opcode); + TCGv_i32 tmp =3D tcg_temp_new_i32(); + int i; + + /* Perform count for every word element using tcg_gen_clzi_i32. */ + for (i =3D 0; i < 4; i++) { + tcg_gen_ld_i32(tmp, cpu_env, + offsetof(CPUPPCState, vsr[32 + VB].u64[0]) + i * 4); + tcg_gen_clzi_i32(tmp, tmp, 32); + tcg_gen_st_i32(tmp, cpu_env, + offsetof(CPUPPCState, vsr[32 + VT].u64[0]) + i * 4); + } + + tcg_temp_free_i32(tmp); +} + +/* * vclzd VRT,VRB - Vector Count Leading Zeros Doubleword * * Counting the number of leading zero bits of each doubleword element in = source @@ -1371,7 +1397,7 @@ GEN_VAFORM_PAIRED(vmaddfp, vnmsubfp, 23) =20 GEN_VXFORM_NOA(vclzb, 1, 28) GEN_VXFORM_NOA(vclzh, 1, 29) -GEN_VXFORM_NOA(vclzw, 1, 30) +GEN_VXFORM_TRANS(vclzw, 1, 30) GEN_VXFORM_TRANS(vclzd, 1, 31) GEN_VXFORM_NOA_2(vnegw, 1, 24, 6) GEN_VXFORM_NOA_2(vnegd, 1, 24, 7) --=20 2.7.4