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[97.113.13.231]) by smtp.gmail.com with ESMTPSA id w6sm6984152pge.30.2019.05.16.19.39.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 May 2019 19:39:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=jubgcMuTGNSY5TtGEwh0c6OxeP3qp5DidyhAq6jVSSw=; b=pGLRipbPkOXOmjEI35CoXuovLU7K9lZmA0Xeuo/WWpNHAjFi9lEc8eo49fVJXTMs2m plPUA3xbKdPi4eX2d5AdtzQt28MUGVRGHy8VAtAqzFQKnqaacSUA2lt2cSqCaEsDnLsn Cnpxcw4lTCDvcorMxeP4zyrt5Ygi2eVHvO47WA1v5HwodeyXvpE90b9qQ/bfRXRSlmf0 2/0ZpNgf0pUW6d2dTo6YYHYN40JrX9mY542na6qRH5CeIjgZVntPi80nK/2IPOHeXjEw xG1qws8GD6Oui2PfGFvb/CMaE8CJ301gnGtqzMUgS5Cm7AYjcvVvqkUkmiqicsPB1n1Q TGdw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=jubgcMuTGNSY5TtGEwh0c6OxeP3qp5DidyhAq6jVSSw=; b=VfNCXV8qpbQVHqrahmqRkha9eG0V7ReJFKOwfn6DGKOAx4xR2l0svX84SnUMOnoBWu 7Pqzeo4l560BpKCTLYsoQuDlH+R2kgAJiZWGFsyjpMrxakKMPWjb4Nc8vSWfiJdIgI1X san2EpqO6Adb4PLQNGHkKVMjcCcFlFfP9RCAo5khLc2Duw0IMWC695zj9C1i4dI+LSzg vTU55usqqZrgiuDswZgpeAHSZks7Fm2s7DVJ0gkqBFJBs6+11Y45emMIZmubkqrow3QM uCpgKPm0yneUwSfzFiDlgRNl+ifcMbdRRLLH5UhL0x4GvNJ3Z9SqW7HktQl/oT3x3AJP hHxA== X-Gm-Message-State: APjAAAVjeJNN6UiVqdjyVEE3DkIBY7k9errOj85SBcAHv6bptjjRvOU6 xv/Y2cKUk2Crxd+9UzTE/ehpDwJaj6A= X-Google-Smtp-Source: APXvYqw4F4Uu0kRyljjYoeRxjOPiwi5RGhEQonRM++/bKeeIBJ50Ns3hXxmycTQbR9fmkijBJeMxYA== X-Received: by 2002:a63:ed03:: with SMTP id d3mr53764456pgi.7.1558060794993; Thu, 16 May 2019 19:39:54 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Thu, 16 May 2019 19:39:22 -0700 Message-Id: <20190517023924.1686-24-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190517023924.1686-1-richard.henderson@linaro.org> References: <20190517023924.1686-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::442 Subject: [Qemu-devel] [PATCH v8 23/25] target/ppc: Use gen_io_start/end around DARN X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lvivier@redhat.com, berrange@redhat.com, armbru@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Generating a random number counts as I/O, as it cannot be replayed and produce the same results. Acked-by: David Gibson Reviewed-by: Laurent Vivier Suggested-by: Peter Maydell Signed-off-by: Richard Henderson --- target/ppc/translate.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/target/ppc/translate.c b/target/ppc/translate.c index b5217f632f..4a5de28036 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -1847,13 +1847,22 @@ static void gen_darn(DisasContext *ctx) { int l =3D L(ctx->opcode); =20 - if (l =3D=3D 0) { - gen_helper_darn32(cpu_gpr[rD(ctx->opcode)]); - } else if (l <=3D 2) { - /* Return 64-bit random for both CRN and RRN */ - gen_helper_darn64(cpu_gpr[rD(ctx->opcode)]); - } else { + if (l > 2) { tcg_gen_movi_i64(cpu_gpr[rD(ctx->opcode)], -1); + } else { + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_io_start(); + } + if (l =3D=3D 0) { + gen_helper_darn32(cpu_gpr[rD(ctx->opcode)]); + } else { + /* Return 64-bit random for both CRN and RRN */ + gen_helper_darn64(cpu_gpr[rD(ctx->opcode)]); + } + if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) { + gen_io_end(); + gen_stop_exception(ctx); + } } } #endif --=20 2.17.1