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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id m7sm3856470wrv.35.2021.06.03.08.59.14 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Jun 2021 08:59:14 -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=LdNDwicn/e7UW7f5kbwzx9b+TmLTkd72n4ur6XKxILI=; b=EVkXuNWmIcWo2W1VjFfdp3Mj/LX1s9bRItnFrN6GG6e+2ZLjg1NjOCZ8fbbMHwjCOi 38XpZDTE1IFbld/dx5L9hH0hhAGBbnTMNWbjPMgg/kGOdnP4BhYBaVvA7NeF6tdPXitc mW3mbeUosPwrj7h1KxR1UTDcFyU/XY4G2YrRaId9IWTooT3mChniPk1echDKGs0kbFdK /poCYi6VmROS7ytVoD89wZydS6bX/RFBQvD2KTmMxcCl3tQ/gZOvnYDVWFAtrErbEzb8 O9jzEASoTzvc49CWtPj24GJEuEuXx2j8DE4Ktd5h4cG+csFj9feDc6MsAVjrxcXsZDwL GRhA== 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=LdNDwicn/e7UW7f5kbwzx9b+TmLTkd72n4ur6XKxILI=; b=S6sSvHsepKrZCfbLyB7A7MlpaFCIxFw29BICWJoylrqmfAqzSRLCok8ZMLK6cmJ0XS k12mY4HL0ZYCmpRHqL7msKqcwk2jtfZv468LJsjRcmeBUQoCzXoRT4kHhBNfzs3K9Qy3 x0qM+UrFeJztep+SEnwYB+acEO7+Tyh29GCAgp0KpWNSm8kDBuewA9PCfl3q/QRGt2sU AZDq+4/3RUvpiaBhJD4BtiP2Ofn5u1yhSjW+Y1ZqCFUqQpDy8fEOeKDPCKXTfx3hbWKu xcTeCyAounEbaor3avItRHNXQUaP2RSnIbfbh+q2oS7eCHss8eijK06E9wKAkHQO5BmB AvmA== X-Gm-Message-State: AOAM5334qfNCNn+r+v29NcoDQllen5EJSBlgajXMDHl+m1Pb/RosZp7n pzbFWh6suGA0UgYn11/QDl/SsBblz1iIgW4N X-Google-Smtp-Source: ABdhPJxlEDDPS+vXf3QIyZcoSm4aIYhzb3a2dgZZdr62+hUxwiyi71EdWfKWHgqOxE8P87AwIQ+whw== X-Received: by 2002:a5d:4a4e:: with SMTP id v14mr672551wrs.74.1622735954929; Thu, 03 Jun 2021 08:59:14 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 11/45] target/arm: Mark LDS{MIN,MAX} as signed operations Date: Thu, 3 Jun 2021 16:58:30 +0100 Message-Id: <20210603155904.26021-12-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210603155904.26021-1-peter.maydell@linaro.org> References: <20210603155904.26021-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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::430; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x430.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) From: Richard Henderson The operands to tcg_gen_atomic_fetch_s{min,max}_i64 must be signed, so that the inputs are properly extended. Zero extend the result afterward, as needed. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/364 Signed-off-by: Richard Henderson Reviewed-by: Alex Benn=C3=A9e Message-id: 20210602020720.47679-1-richard.henderson@linaro.org Signed-off-by: Peter Maydell --- target/arm/translate-a64.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index ceac0ee2bd6..d6906d9012c 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -3355,8 +3355,9 @@ static void disas_ldst_atomic(DisasContext *s, uint32= _t insn, int o3_opc =3D extract32(insn, 12, 4); bool r =3D extract32(insn, 22, 1); bool a =3D extract32(insn, 23, 1); - TCGv_i64 tcg_rs, clean_addr; + TCGv_i64 tcg_rs, tcg_rt, clean_addr; AtomicThreeOpFn *fn =3D NULL; + MemOp mop =3D s->be_data | size | MO_ALIGN; =20 if (is_vector || !dc_isar_feature(aa64_atomics, s)) { unallocated_encoding(s); @@ -3377,9 +3378,11 @@ static void disas_ldst_atomic(DisasContext *s, uint3= 2_t insn, break; case 004: /* LDSMAX */ fn =3D tcg_gen_atomic_fetch_smax_i64; + mop |=3D MO_SIGN; break; case 005: /* LDSMIN */ fn =3D tcg_gen_atomic_fetch_smin_i64; + mop |=3D MO_SIGN; break; case 006: /* LDUMAX */ fn =3D tcg_gen_atomic_fetch_umax_i64; @@ -3422,6 +3425,7 @@ static void disas_ldst_atomic(DisasContext *s, uint32= _t insn, } =20 tcg_rs =3D read_cpu_reg(s, rs, true); + tcg_rt =3D cpu_reg(s, rt); =20 if (o3_opc =3D=3D 1) { /* LDCLR */ tcg_gen_not_i64(tcg_rs, tcg_rs); @@ -3430,8 +3434,11 @@ static void disas_ldst_atomic(DisasContext *s, uint3= 2_t insn, /* The tcg atomic primitives are all full barriers. Therefore we * can ignore the Acquire and Release bits of this instruction. */ - fn(cpu_reg(s, rt), clean_addr, tcg_rs, get_mem_index(s), - s->be_data | size | MO_ALIGN); + fn(tcg_rt, clean_addr, tcg_rs, get_mem_index(s), mop); + + if ((mop & MO_SIGN) && size !=3D MO_64) { + tcg_gen_ext32u_i64(tcg_rt, tcg_rt); + } } =20 /* --=20 2.20.1