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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id g15sm4955716wrx.1.2021.02.11.04.59.24 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Feb 2021 04:59:25 -0800 (PST) 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=B7Md5FuB4zN4GGBUtZ2CBu4dxFI5W4WDEoeLJYQNPbI=; b=Y8CxfNgJ54/1UTffvtn8YVEe/+Hdbo25zGnk6xr+mOgN5BOpftZCBNJRZPNiDAwe0W bI9zw2ewcimgnuEluSpqvrzRGFk6IXJVlQ9iYSE2eQ947Gu6Wple7+2HacWdeW13tg0W hYS52iEDCJTxU6qVVPrD8fAQGlGZa7XLKct0Q5LFoPo67lr86yi2+n0uKH0Hqh2ROoD4 imXQAMKgEpMr/7pOuOKuF9f+826ye+jcSBJCXmV9bRIZBRGk3Ed2VOLP0cqcwVQa7Vdw brrNUe2L89ziZbW/cCXy0QQTQDBmvd4OryN8fXtUYuE2nYgRcnJIvGQq6QmNzn9XCU1S LgzA== 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=B7Md5FuB4zN4GGBUtZ2CBu4dxFI5W4WDEoeLJYQNPbI=; b=JTm6bVMujAYC77BEf3Bj0sJSnesa6apzwh/ygzGfHPT0RSM1m9j0K1sn3kDafDIyud dPwJ2VdoSW5p05mdz22KMASNc3/Pzo+hgZq9Sd4I3zV72IogbyBtM28K9bbPsaGXAyj3 K/cYue/PzreA0vMheF+0OGktfztJ207uV/gEXlj/OQ33RUIX9ny9IeUbXiz2+1fLiYRA Cz+2X8l6kNoXkzTA678po+MMkNQgJkR6TP0CxWm+knSM0VdR5zjfyuiIaVdyg4wMIGw6 omxLsRzN3sqntlH5qjBZykI10WqRjBy8sSyAQawtmmK/3SNvm4OhGsjmAMVMzgFE6uP5 FD2A== X-Gm-Message-State: AOAM532wvCBSqaZKrsgBisLAqKs2umwM6wba/JAsqeNVzmEp95O5yhOv v8lEuBUiHUdufsY1Q1Oi1wR2R2+R/Ld9Xg== X-Google-Smtp-Source: ABdhPJzlbQ+TJzrM/h8jI5VxFDs4fKClRqnH6TxLGXH2uTGD+TMcT1ajTyfvlL2xwV591DsEjQUGNQ== X-Received: by 2002:a05:6000:1201:: with SMTP id e1mr5808352wrx.14.1613048365368; Thu, 11 Feb 2021 04:59:25 -0800 (PST) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 30/45] target/arm: Improve gen_top_byte_ignore Date: Thu, 11 Feb 2021 12:58:45 +0000 Message-Id: <20210211125900.22777-31-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210211125900.22777-1-peter.maydell@linaro.org> References: <20210211125900.22777-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::42f; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x42f.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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" From: Richard Henderson Use simple arithmetic instead of a conditional move when tbi0 !=3D tbi1. Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson Message-id: 20210210000223.884088-22-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- target/arm/translate-a64.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 1c4b8d02f3b..b23a8975d54 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -183,17 +183,20 @@ static void gen_top_byte_ignore(DisasContext *s, TCGv= _i64 dst, /* Sign-extend from bit 55. */ tcg_gen_sextract_i64(dst, src, 0, 56); =20 - if (tbi !=3D 3) { - TCGv_i64 tcg_zero =3D tcg_const_i64(0); - - /* - * The two TBI bits differ. - * If tbi0, then !tbi1: only use the extension if positive. - * if !tbi0, then tbi1: only use the extension if negative. - */ - tcg_gen_movcond_i64(tbi =3D=3D 1 ? TCG_COND_GE : TCG_COND_LT, - dst, dst, tcg_zero, dst, src); - tcg_temp_free_i64(tcg_zero); + switch (tbi) { + case 1: + /* tbi0 but !tbi1: only use the extension if positive */ + tcg_gen_and_i64(dst, dst, src); + break; + case 2: + /* !tbi0 but tbi1: only use the extension if negative */ + tcg_gen_or_i64(dst, dst, src); + break; + case 3: + /* tbi0 and tbi1: always use the extension */ + break; + default: + g_assert_not_reached(); } } } --=20 2.20.1