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[97.113.188.82]) by smtp.gmail.com with ESMTPSA id w10sm25228143pge.8.2019.02.19.21.04.56 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 19 Feb 2019 21:04:57 -0800 (PST) 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=FhCW0wNKpM5l2LxvA6dXiW7IbYc+zV/iAYzSXtJqiPg=; b=hycl7/P6FlltOY+heCIuQADGUxcpBYICsPQWKM4hns85e45Jx4xWJ6M8kpbeZjuwn2 kPvjrsnkieDPHinPUdxAwMC/YlSLMP0Ec7DKxsa/rIja0vr+imhmfOU9esed08foauf8 lhya1UsTta9Cvb/4Px//aQXAPdJ3q4w4+H7TFQg6i+I5bDscLgmW0XjSNXboWTESL7xb d+H58G71ZYGs3lG35pjEifXMLvy9rEPZIWAQbd7xgLSW03t3NRqAtBSKI+mMHIRneCBz cXNA2pieEQTXshHISUS13+bTXnUflq+SztW0dgP9zOG3Lhf5TTH461WE9H568FhDWF4/ sLiQ== 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=FhCW0wNKpM5l2LxvA6dXiW7IbYc+zV/iAYzSXtJqiPg=; b=PYiIr7Krj1w7r+M3ImqFcRZWnogAsl8sZ7MeS8mrXVyatpLdJSa7yPYq3zivHTqo6L U3cpZWjtwjp5isHjc3i5EDmu8jTLZmRW0JHiVEwTT+3bJWXeFceHx2OAmeCdbzUKYZQY 7UoQDmx27vGIRi/U8xF9Hl1nZptOnDNnoMdAGIVq84iNH4REgzts/q6skgFRlk7hunf0 HSLcb5UHav53Fas17TLEnXCphCrOEF0WOz4G6XOlnvv5QRhKX5Xh3i/nqiSr31z78G+E zsC/c2xo8dQ/05G2ui06AHGbVaE15ASTHWswnsHBIaA+j3pJTMIKSMyj4jHiauWGV9PM QhmQ== X-Gm-Message-State: AHQUAub9wC4FSVggVJB+BmfbKLjGnSFsImRdGmi0+kndnpRqrVJD8HU0 vk0BnVEhrKJGt/L/tNJfII1deJZmug8= X-Google-Smtp-Source: AHgI3IYVbsvdvabVunzp13v+/aP4A+fJ3YCESdieu1ssTFi6OMo0IyHNrC0jjU4m2Ns8sSFyLYT/Ww== X-Received: by 2002:a63:9402:: with SMTP id m2mr26529889pge.93.1550639097927; Tue, 19 Feb 2019 21:04:57 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Date: Tue, 19 Feb 2019 21:04:51 -0800 Message-Id: <20190220050451.10939-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190220050451.10939-1-richard.henderson@linaro.org> References: <20190220050451.10939-1-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::542 Subject: [Qemu-devel] [PATCH 3/3] target/arm: Implement ARMv8.5-CondM 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: peter.maydell@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/cpu.h | 5 ++++ target/arm/translate-a64.c | 58 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 63 insertions(+) diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 000e778619..0480f9baba 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -3380,6 +3380,11 @@ static inline bool isar_feature_aa64_condm_4(const A= RMISARegisters *id) return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, TS) !=3D 0; } =20 +static inline bool isar_feature_aa64_condm_5(const ARMISARegisters *id) +{ + return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, TS) >=3D 2; +} + static inline bool isar_feature_aa64_fcma(const ARMISARegisters *id) { return FIELD_EX64(id->id_aa64isar1, ID_AA64ISAR1, FCMA) !=3D 0; diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index b88eccef53..1d9bf81c0e 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -1644,6 +1644,48 @@ static void handle_sync(DisasContext *s, uint32_t in= sn, } } =20 +static void gen_xaflag(void) +{ + TCGv_i32 z =3D tcg_temp_new_i32(); + + tcg_gen_setcondi_i32(TCG_COND_EQ, z, cpu_ZF, 0); + + /* + * (!C & !Z) << 31 + * (!(C | Z)) << 31 + * ~((C | Z) << 31) + * ~-(C | Z) + * (C | Z) - 1 + */ + tcg_gen_or_i32(cpu_NF, cpu_CF, z); + tcg_gen_subi_i32(cpu_NF, cpu_NF, 1); + + /* !(Z & C) */ + tcg_gen_and_i32(cpu_ZF, z, cpu_CF); + tcg_gen_xori_i32(cpu_ZF, cpu_ZF, 1); + + /* (!C & Z) << 31 -> -(Z & ~C) */ + tcg_gen_andc_i32(cpu_VF, z, cpu_CF); + tcg_gen_neg_i32(cpu_VF, cpu_VF); + + /* C | Z */ + tcg_gen_or_i32(cpu_CF, cpu_CF, z); + + tcg_temp_free_i32(z); +} + +static void gen_axflag(void) +{ + tcg_gen_sari_i32(cpu_VF, cpu_VF, 31); /* V ? -1 : 0 */ + tcg_gen_andc_i32(cpu_CF, cpu_CF, cpu_VF); /* C & !V */ + + /* !(Z | V) -> !(!ZF | V) -> ZF & !V -> ZF & ~VF */ + tcg_gen_andc_i32(cpu_ZF, cpu_ZF, cpu_VF); + + tcg_gen_movi_i32(cpu_NF, 0); + tcg_gen_movi_i32(cpu_VF, 0); +} + /* MSR (immediate) - move immediate to processor state field */ static void handle_msr_i(DisasContext *s, uint32_t insn, unsigned int op1, unsigned int op2, unsigned int = crm) @@ -1663,6 +1705,22 @@ static void handle_msr_i(DisasContext *s, uint32_t i= nsn, s->base.is_jmp =3D DISAS_NEXT; break; =20 + case 0x01: /* XAFlag */ + if (crm !=3D 0 || !dc_isar_feature(aa64_condm_5, s)) { + goto do_unallocated; + } + gen_xaflag(); + s->base.is_jmp =3D DISAS_NEXT; + break; + + case 0x02: /* AXFlag */ + if (crm !=3D 0 || !dc_isar_feature(aa64_condm_5, s)) { + goto do_unallocated; + } + gen_axflag(); + s->base.is_jmp =3D DISAS_NEXT; + break; + case 0x05: /* SPSel */ if (s->current_el =3D=3D 0) { goto do_unallocated; --=20 2.17.2