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[97.126.117.207]) by smtp.gmail.com with ESMTPSA id o24sm104287919pfp.135.2019.07.26.10.51.41 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 26 Jul 2019 10:51:41 -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=jvX6d8XTRW2yINP7UUXQMp5wulYHcQa40IZNorojim4=; b=Wa09kRYm6m3CF3ttivMMv8u/yQKXirGUlAJVWq4s8hIZCc1gyeFdJCRrNob2zTCJWQ lrCwA4+AzRPw+J4AJvZtpquXXt5eFlYD5ol9rVJufp+s+f+oqzyPQkc1kPm0BqF913Vz Bww8YS5g8Wsh/rZaM7NhrWOktQRCJBDtXvML3bTNiRUaepVEiDDW0MAF8Ld7ERVo7Oj9 jrd1+ADjUKBWHNbYP15JpcwL0g1KP7+uH8kVoEAUo15Rn0RAUp3I0+Z8waiX1/DVLkP2 Ei4TmzmUqskYn3FqJ7JFm0BFIfX22UKjw6dTA3dxK78iyUJacKIKi03qFMcpk0H9iD3d eevA== 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=jvX6d8XTRW2yINP7UUXQMp5wulYHcQa40IZNorojim4=; b=pMV2YAywcXWvr543wYMFa7HhCRrGdEkhCpJ4V3X5f4W7/nNT9u6KRGvtBjVvmY/Ytc vX4MxC/FOsNPFta/EAvAxtQHeDYPAWdDcmQ3dlKba1eSm5poNvLCr1BvTa+CSumHykDo KQp4J92jXAL62THXCgb9N/5AUgNr7imrBWQE/qsLdJQd3pP0HRcOxMxpjPfpI5wWkoWK N61OMcqj+w9lR6twSHW9OPnudA1/OaEDQBSVlwHbPjPZNzrvdJTKtFEBGLHWbi7AI/LC h9/HYcRzWmM2oATfwuBZ99otbsLbnZc0RfgXon2Fmfdbsx7cLIrKj+L8HkpvgafnGnwI H2uA== X-Gm-Message-State: APjAAAWn0Xplubd68aR6sqp6enIIUH+na8vkfYQwtLDvnyz2qY5MqGtV 22LzZDj9uMdNwgQgZsRYRpg+T+6CR74= X-Google-Smtp-Source: APXvYqwtumCJAkOH7kSgFyzr4i+A3ue+GmiEwzCK9gv08RbYUzsV86QfUUoZt0ZzzgKU1JtXyvTJxw== X-Received: by 2002:a65:5188:: with SMTP id h8mr59842315pgq.294.1564163502521; Fri, 26 Jul 2019 10:51:42 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Fri, 26 Jul 2019 10:50:22 -0700 Message-Id: <20190726175032.6769-58-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190726175032.6769-1-richard.henderson@linaro.org> References: <20190726175032.6769-1-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 57/67] target/arm: Convert T16, nop hints 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: peter.maydell@linaro.org, qemu-arm@nongnu.org, alex.bennee@linaro.org 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" Signed-off-by: Richard Henderson --- target/arm/translate.c | 3 +-- target/arm/t16.decode | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/target/arm/translate.c b/target/arm/translate.c index c9386ceefb..55404414a2 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -10779,8 +10779,7 @@ static void disas_thumb_insn(DisasContext *s, uint3= 2_t insn) =20 case 15: /* IT, nop-hint. */ if ((insn & 0xf) =3D=3D 0) { - gen_nop_hint(s, (insn >> 4) & 0xf); - break; + goto illegal_op; /* nop hint, in decodetree */ } /* * IT (If-Then) diff --git a/target/arm/t16.decode b/target/arm/t16.decode index 8864f89a81..90a4b71a45 100644 --- a/target/arm/t16.decode +++ b/target/arm/t16.decode @@ -19,6 +19,7 @@ # This file is processed by scripts/decodetree.py # =20 +&empty !extern &s_rrr_shi !extern s rd rn rm shim shty &s_rrr_shr !extern s rn rd rm rs shty &s_rri_rot !extern s rn rd imm rot @@ -204,3 +205,19 @@ SETEND 1011 0110 010 1 E:1 000 &setend REV 1011 1010 00 ... ... @rdm REV16 1011 1010 01 ... ... @rdm REVSH 1011 1010 11 ... ... @rdm + +# Hints + +{ + YIELD 1011 1111 0001 0000 + WFE 1011 1111 0010 0000 + WFI 1011 1111 0011 0000 + + # TODO: Implement SEV, SEVL; may help SMP performance. + # SEV 1011 1111 0100 0000 + # SEVL 1011 1111 0101 0000 + + # The canonical nop has the second nibble as 0000, but the whole of the + # rest of the space is a reserved hint, behaves as nop. + NOP 1011 1111 ---- 0000 +} --=20 2.17.1