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([212.241.182.8]) by smtp.gmail.com with ESMTPSA id t14-20020a5d460e000000b003047ae72b14sm3426709wrq.82.2023.05.05.14.24.59 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 May 2023 14:24:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1683321900; x=1685913900; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=Op61LyFiNoJTk9LIzK5doaDEyxOgewGDHJjDkfUTrQ4=; b=XtIEOaEuhG17hyduWVNQq+sloifk1TKf/Sxnie+7YP0ip0KD80J/tIpvyGhNlS+Tro 6e2mYd4W+V/4q00CcIoxQij/lLnbVksbU0lE4BvvJ+QWX+gPBg+u+Prlt/THZbM+WQ2d lhDCGeIG8XkArvFs3rfGb1RehMy91L8rqcpHNT6fJ1merp5Ev/yc83NwYaSYKy3EvkRp m8hLt+yXvOgBo0SABNkEDpXphMIlCJAoMeThzi6YNp+g9bgHlsr+6GkssWOdhR5FyoRL NCpJkTK/iL8cPiwzdu5NnuideFZYVjIixl+grtkuOt/SBO3pmAkHXDn2nZdcQFvmXkCp FXrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683321900; x=1685913900; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Op61LyFiNoJTk9LIzK5doaDEyxOgewGDHJjDkfUTrQ4=; b=UGW1mjlwL4rhItEnHDHyj+tdO8zYpsbASXlu22mRnjOkopPqiHdZOxrw2my9QIDUqq x2XTB9hXjBDuo9cFX1w3ZDAEl8mSbeEpXe8cnq21ovdlEqoSilJbKwsHotbCTK//xN9F 3QleaSExjgjf88UEI1L0xnz7EdcssBmEGVuG4X7QmR4ku5pUkl+uaUx0JzGUmesYlP1e 8GFDYhDjglz7EGIElhTw8gAxY+ay57jP8VobyGTQuQi2wrE1KPABhCm1fE2m0X0R3xjw N1UP67HhIZBvQG+vUTYfBUmA5gYuYVDToERdhwFqS99TNPk/kO3XONjk3AFdHFqB+kX1 HsHA== X-Gm-Message-State: AC+VfDx0FX1HnT1Qrpz9mRiBGQmo3fNHX7MACocunNGGnh1O1u7KREpg TND7Qq1lHUEfsk1sFkckBb7oOjEhBc3+S+2x9keK/Q== X-Google-Smtp-Source: ACHHUZ7GsyjKIF4rxOuy+Vvk4Qhl7Cabj26NLXoNwGG/pCRzvjDfm+rxc8J3iO8tyxFOjRfxIaHoyQ== X-Received: by 2002:adf:fb06:0:b0:307:7bca:2964 with SMTP id c6-20020adffb06000000b003077bca2964mr2180418wrr.14.1683321899915; Fri, 05 May 2023 14:24:59 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL 20/42] tcg/i386: Generalize multi-part load overlap test Date: Fri, 5 May 2023 22:24:25 +0100 Message-Id: <20230505212447.374546-21-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230505212447.374546-1-richard.henderson@linaro.org> References: <20230505212447.374546-1-richard.henderson@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::434; envelope-from=richard.henderson@linaro.org; helo=mail-wr1-x434.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, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 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-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1683322191381100003 Content-Type: text/plain; charset="utf-8" Test for both base and index; use datahi as a temporary, overwritten by the final load. Always perform the loads in ascending order, so that any (user-only) fault sees the correct address. Signed-off-by: Richard Henderson --- tcg/i386/tcg-target.c.inc | 31 +++++++++++++++---------------- 1 file changed, 15 insertions(+), 16 deletions(-) diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc index cfa2349b03..173f3c3172 100644 --- a/tcg/i386/tcg-target.c.inc +++ b/tcg/i386/tcg-target.c.inc @@ -2221,23 +2221,22 @@ static void tcg_out_qemu_ld_direct(TCGContext *s, T= CGReg datalo, TCGReg datahi, if (TCG_TARGET_REG_BITS =3D=3D 64) { tcg_out_modrm_sib_offset(s, movop + P_REXW + seg, datalo, base, index, 0, ofs); + break; + } + if (use_movbe) { + TCGReg t =3D datalo; + datalo =3D datahi; + datahi =3D t; + } + if (base =3D=3D datalo || index =3D=3D datalo) { + tcg_out_modrm_sib_offset(s, OPC_LEA, datahi, base, index, 0, o= fs); + tcg_out_modrm_offset(s, movop + seg, datalo, datahi, 0); + tcg_out_modrm_offset(s, movop + seg, datahi, datahi, 4); } else { - if (use_movbe) { - TCGReg t =3D datalo; - datalo =3D datahi; - datahi =3D t; - } - if (base !=3D datalo) { - tcg_out_modrm_sib_offset(s, movop + seg, datalo, - base, index, 0, ofs); - tcg_out_modrm_sib_offset(s, movop + seg, datahi, - base, index, 0, ofs + 4); - } else { - tcg_out_modrm_sib_offset(s, movop + seg, datahi, - base, index, 0, ofs + 4); - tcg_out_modrm_sib_offset(s, movop + seg, datalo, - base, index, 0, ofs); - } + tcg_out_modrm_sib_offset(s, movop + seg, datalo, + base, index, 0, ofs); + tcg_out_modrm_sib_offset(s, movop + seg, datahi, + base, index, 0, ofs + 4); } break; default: --=20 2.34.1