From patchwork Fri Oct 29 20:23:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matheus K. Ferst" X-Patchwork-Id: 12593739 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63502C433EF for ; Fri, 29 Oct 2021 20:41:09 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 195936103E for ; Fri, 29 Oct 2021 20:41:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 195936103E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=eldorado.org.br Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:34364 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mgYgU-00079z-Cu for qemu-devel@archiver.kernel.org; Fri, 29 Oct 2021 16:41:06 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44320) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mgYRi-0001Nv-SP; Fri, 29 Oct 2021 16:25:50 -0400 Received: from [201.28.113.2] (port=65208 helo=outlook.eldorado.org.br) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mgYRh-0001sK-BR; Fri, 29 Oct 2021 16:25:50 -0400 Received: from power9a ([10.10.71.235]) by outlook.eldorado.org.br with Microsoft SMTPSVC(8.5.9600.16384); Fri, 29 Oct 2021 17:25:42 -0300 Received: from eldorado.org.br (unknown [10.10.70.45]) by power9a (Postfix) with ESMTP id 94EF1800B36; Fri, 29 Oct 2021 17:25:41 -0300 (-03) From: matheus.ferst@eldorado.org.br To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Subject: [PATCH v2 07/34] target/ppc: Implement cntlzdm Date: Fri, 29 Oct 2021 17:23:57 -0300 Message-Id: <20211029202424.175401-8-matheus.ferst@eldorado.org.br> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211029202424.175401-1-matheus.ferst@eldorado.org.br> References: <20211029202424.175401-1-matheus.ferst@eldorado.org.br> MIME-Version: 1.0 X-OriginalArrivalTime: 29 Oct 2021 20:25:42.0110 (UTC) FILETIME=[250FAFE0:01D7CD03] X-Host-Lookup-Failed: Reverse DNS lookup failed for 201.28.113.2 (failed) Received-SPF: pass client-ip=201.28.113.2; envelope-from=matheus.ferst@eldorado.org.br; helo=outlook.eldorado.org.br X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, PDS_HP_HELO_NORDNS=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action 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: lucas.castro@eldorado.org.br, richard.henderson@linaro.org, groug@kaod.org, luis.pires@eldorado.org.br, Matheus Ferst , david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Luis Pires Implement the following PowerISA v3.1 instruction: cntlzdm: Count Leading Zeros Doubleword Under Bit Mask Suggested-by: Richard Henderson Signed-off-by: Luis Pires Signed-off-by: Matheus Ferst Reviewed-by: Richard Henderson --- v2: - Inline implementation of cntlzdm --- target/ppc/insn32.decode | 1 + target/ppc/translate/fixedpoint-impl.c.inc | 36 ++++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode index 9cb9fc00b8..221cb00dd6 100644 --- a/target/ppc/insn32.decode +++ b/target/ppc/insn32.decode @@ -203,6 +203,7 @@ ADDPCIS 010011 ..... ..... .......... 00010 . @DX ## Fixed-Point Logical Instructions CFUGED 011111 ..... ..... ..... 0011011100 - @X +CNTLZDM 011111 ..... ..... ..... 0000111011 - @X ### Float-Point Load Instructions diff --git a/target/ppc/translate/fixedpoint-impl.c.inc b/target/ppc/translate/fixedpoint-impl.c.inc index 0d9c6e0996..c9e9ae35df 100644 --- a/target/ppc/translate/fixedpoint-impl.c.inc +++ b/target/ppc/translate/fixedpoint-impl.c.inc @@ -413,3 +413,39 @@ static bool trans_CFUGED(DisasContext *ctx, arg_X *a) #endif return true; } + +#if defined(TARGET_PPC64) +static void do_cntlzdm(TCGv_i64 dst, TCGv_i64 src, TCGv_i64 mask) +{ + TCGv_i64 tmp; + TCGLabel *l1; + + tmp = tcg_temp_local_new_i64(); + l1 = gen_new_label(); + + tcg_gen_and_i64(tmp, src, mask); + tcg_gen_clzi_i64(tmp, tmp, 64); + + tcg_gen_brcondi_i64(TCG_COND_EQ, tmp, 0, l1); + + tcg_gen_subfi_i64(tmp, 64, tmp); + tcg_gen_shr_i64(tmp, mask, tmp); + tcg_gen_ctpop_i64(tmp, tmp); + + gen_set_label(l1); + + tcg_gen_mov_i64(dst, tmp); +} +#endif + +static bool trans_CNTLZDM(DisasContext *ctx, arg_X *a) +{ + REQUIRE_64BIT(ctx); + REQUIRE_INSNS_FLAGS2(ctx, ISA310); +#if defined(TARGET_PPC64) + do_cntlzdm(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb]); +#else + qemu_build_not_reached(); +#endif + return true; +}