From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 306FCC4338F for ; Wed, 18 Aug 2021 21:42:18 +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 CCEA6610A6 for ; Wed, 18 Aug 2021 21:42:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org CCEA6610A6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:43890 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mGTKC-0001pq-V3 for qemu-devel@archiver.kernel.org; Wed, 18 Aug 2021 17:42:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57238) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mGT7i-0005nP-8T for qemu-devel@nongnu.org; Wed, 18 Aug 2021 17:29:22 -0400 Received: from mail-pg1-x533.google.com ([2607:f8b0:4864:20::533]:43914) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mGT7g-0005jk-OW for qemu-devel@nongnu.org; Wed, 18 Aug 2021 17:29:21 -0400 Received: by mail-pg1-x533.google.com with SMTP id r2so3707343pgl.10 for ; Wed, 18 Aug 2021 14:29:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=Eg6xgC0Zn9gwcbgRPdMs7fC32gwJkdzHxMMdYwWwU48=; b=lzqU6AbYnic27Qu+JRNkYp2wEg5vm3lsRjgvxjYO1Vt5JpnTMaaj8f+eNd2uEXJkaz JInq2JrJbLNzZsLWB7vpfmCAZ/xGrmoSjshpaBr2Oi3KqceSHVuhV1j5axtVp79O+uVr ag0oYpEXYOIFPcfWplGwsWDiGwrMgzKMmMQQOPTV7C7jijhJZ9nTMKTYwWfsInbm3Mpa SkjVgv1aAMfyJHcp8M9kpf29x5+s30udWrYApoIkaPaS4zyxMr4gunWmMgfjbKDmAlFE O8ExFR+YNBitM0oON+jS8T2SMIW4F2OjlvLbp6nm/H9gPU66CujKsZWfZlZmcwdacLOD hpIA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Eg6xgC0Zn9gwcbgRPdMs7fC32gwJkdzHxMMdYwWwU48=; b=pOhxSHHAvIJZgAmbHn+F45E1hgDSZ3VV0at0ViBZRhJXamzrIU0+5KFydDs1HKpHWx daWb4p2qWSJj4jXlBMJeBB/uuTyAMTgYb8Lh5HxKKGMMWjnb7l0q8ZBnPJINI6XOofxL phJl+3AyMY3PT8coHz3KkualmDakSil/X97aIDhv9Ux9dPIYEeS4pv+lYKiqSF/7lT7f V0cP7zVC98S/+Z/vHoHHmt9J4La04lh2z6Emi4HmoUy/TVxYEUKDDO4UbVpGl1dpZiyT ACOag29o5kKmEdaE+yjZgmw7iw7Z7rgjC5ea+Dns5BDnwtQodzaMa/Uh2BgKNQj85Oe5 SY9g== X-Gm-Message-State: AOAM5306WMsp8jos5T+6vG5oEZj+DKVsPcDk339KHfw9wO3JJGMGv09C 8SzOExl2vuay5qIasWVPim5qosDP1cf+jw== X-Google-Smtp-Source: ABdhPJzC6KF7AlY1wpvmWs4MCE9RnNwYcil5JXrJwK9WLVofFRYFrUUFAvzPWafZ9228tlQ0PNyaqA== X-Received: by 2002:a63:164a:: with SMTP id 10mr10873862pgw.161.1629322159470; Wed, 18 Aug 2021 14:29:19 -0700 (PDT) Received: from localhost.localdomain ([173.197.107.15]) by smtp.gmail.com with ESMTPSA id y19sm751965pfe.71.2021.08.18.14.29.18 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Aug 2021 14:29:19 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v3 05/14] tcg/arm: Examine QEMU_TCG_DEBUG environment variable Date: Wed, 18 Aug 2021 11:29:03 -1000 Message-Id: <20210818212912.396794-6-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210818212912.396794-1-richard.henderson@linaro.org> References: <20210818212912.396794-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::533; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x533.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Use the environment variable to test an older ISA from the one supported by the host. Signed-off-by: Richard Henderson --- tcg/arm/tcg-target.h | 8 +++++++- tcg/arm/tcg-target.c.inc | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+), 1 deletion(-) diff --git a/tcg/arm/tcg-target.h b/tcg/arm/tcg-target.h index f41b809554..e47720a85b 100644 --- a/tcg/arm/tcg-target.h +++ b/tcg/arm/tcg-target.h @@ -28,9 +28,15 @@ extern int arm_arch; +#ifdef CONFIG_DEBUG_TCG +#define use_armv5t_instructions (arm_arch >= 5) +#define use_armv6_instructions (arm_arch >= 6) +#define use_armv7_instructions (arm_arch >= 7) +#else #define use_armv5t_instructions (__ARM_ARCH >= 5 || arm_arch >= 5) #define use_armv6_instructions (__ARM_ARCH >= 6 || arm_arch >= 6) #define use_armv7_instructions (__ARM_ARCH >= 7 || arm_arch >= 7) +#endif #undef TCG_TARGET_STACK_GROWSUP #define TCG_TARGET_INSN_UNIT_SIZE 4 @@ -83,7 +89,7 @@ typedef enum { #else extern bool use_idiv_instructions; #endif -#ifdef __ARM_NEON__ +#if defined(__ARM_NEON__) && !defined(CONFIG_DEBUG_TCG) #define use_neon_instructions 1 #else extern bool use_neon_instructions; diff --git a/tcg/arm/tcg-target.c.inc b/tcg/arm/tcg-target.c.inc index 87df812bb5..0c7e4f8411 100644 --- a/tcg/arm/tcg-target.c.inc +++ b/tcg/arm/tcg-target.c.inc @@ -2455,6 +2455,38 @@ static void tcg_target_init(TCGContext *s) } } + /* + * For debugging/testing purposes, allow the ISA to be reduced + * (but not extended) from the set detected above. + */ +#ifdef CONFIG_DEBUG_TCG + { + char *opt = g_strdup(getenv("QEMU_TCG_DEBUG")); + if (opt) { + for (char *o = strtok(opt, ","); o ; o = strtok(NULL, ",")) { + if (o[0] == 'v' && + o[1] >= '4' && + o[1] <= '0' + arm_arch && + o[2] == 0) { + arm_arch = o[1] - '0'; + continue; + } + if (strcmp(o, "!neon") == 0) { + use_neon_instructions = false; + continue; + } + if (strcmp(o, "help") == 0) { + printf("QEMU_TCG_DEBUG={,} where is\n" + " v select ARMv\n" + " !neon disable ARM NEON\n"); + exit(0); + } + } + g_free(opt); + } + } +#endif + tcg_target_available_regs[TCG_TYPE_I32] = ALL_GENERAL_REGS; tcg_target_call_clobber_regs = 0; -- 2.25.1