From patchwork Fri Oct 29 20:23:58 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: 12593737 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 A298DC433F5 for ; Fri, 29 Oct 2021 20:39:48 +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 4E4ED6103E for ; Fri, 29 Oct 2021 20:39:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 4E4ED6103E 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]:60368 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mgYfD-0005h7-DA for qemu-devel@archiver.kernel.org; Fri, 29 Oct 2021 16:39:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44348) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mgYRm-0001dC-Fy; Fri, 29 Oct 2021 16:25:54 -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 1mgYRk-0001sK-0B; Fri, 29 Oct 2021 16:25:53 -0400 Received: from power9a ([10.10.71.235]) by outlook.eldorado.org.br with Microsoft SMTPSVC(8.5.9600.16384); Fri, 29 Oct 2021 17:25:45 -0300 Received: from eldorado.org.br (unknown [10.10.70.45]) by power9a (Postfix) with ESMTP id 1420F800B36; Fri, 29 Oct 2021 17:25:45 -0300 (-03) From: matheus.ferst@eldorado.org.br To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Subject: [PATCH v2 08/34] target/ppc: Implement cnttzdm Date: Fri, 29 Oct 2021 17:23:58 -0300 Message-Id: <20211029202424.175401-9-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 20:25:45.0576 (UTC) FILETIME=[27208E80:01D7CD03] 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: cnttzdm: Count Trailing 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 cnttzdm --- target/ppc/insn32.decode | 1 + target/ppc/translate/fixedpoint-impl.c.inc | 28 ++++++++++++++++++---- 2 files changed, 25 insertions(+), 4 deletions(-) diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode index 221cb00dd6..3d692e9e6a 100644 --- a/target/ppc/insn32.decode +++ b/target/ppc/insn32.decode @@ -204,6 +204,7 @@ ADDPCIS 010011 ..... ..... .......... 00010 . @DX CFUGED 011111 ..... ..... ..... 0011011100 - @X CNTLZDM 011111 ..... ..... ..... 0000111011 - @X +CNTTZDM 011111 ..... ..... ..... 1000111011 - @X ### Float-Point Load Instructions diff --git a/target/ppc/translate/fixedpoint-impl.c.inc b/target/ppc/translate/fixedpoint-impl.c.inc index c9e9ae35df..d3dc0a474e 100644 --- a/target/ppc/translate/fixedpoint-impl.c.inc +++ b/target/ppc/translate/fixedpoint-impl.c.inc @@ -415,7 +415,7 @@ static bool trans_CFUGED(DisasContext *ctx, arg_X *a) } #if defined(TARGET_PPC64) -static void do_cntlzdm(TCGv_i64 dst, TCGv_i64 src, TCGv_i64 mask) +static void do_cntzdm(TCGv_i64 dst, TCGv_i64 src, TCGv_i64 mask, bool trail) { TCGv_i64 tmp; TCGLabel *l1; @@ -424,12 +424,20 @@ static void do_cntlzdm(TCGv_i64 dst, TCGv_i64 src, TCGv_i64 mask) l1 = gen_new_label(); tcg_gen_and_i64(tmp, src, mask); - tcg_gen_clzi_i64(tmp, tmp, 64); + if (trail) { + tcg_gen_ctzi_i64(tmp, tmp, 64); + } else { + 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); + if (trail) { + tcg_gen_shl_i64(tmp, mask, tmp); + } else { + tcg_gen_shr_i64(tmp, mask, tmp); + } tcg_gen_ctpop_i64(tmp, tmp); gen_set_label(l1); @@ -443,7 +451,19 @@ 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]); + do_cntzdm(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb], false); +#else + qemu_build_not_reached(); +#endif + return true; +} + +static bool trans_CNTTZDM(DisasContext *ctx, arg_X *a) +{ + REQUIRE_64BIT(ctx); + REQUIRE_INSNS_FLAGS2(ctx, ISA310); +#if defined(TARGET_PPC64) + do_cntzdm(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb], true); #else qemu_build_not_reached(); #endif