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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id 2sm10071495wrg.89.2019.03.05.08.51.01 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 Mar 2019 08:51:01 -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=6okvE7uC7mBDYDrWvZ0cqfGHbi6R3ezFCBMDjGZAc2A=; b=WBU4qNCgjrwmgFTvMSMCESN/6rDZc7V3eivFs+o7uCGeCLJ8mCnek3hOfxhpS245Ks y3oQDaqBitgdVrdTqyYZe+JGI1D6sNDQUSSTf/t4zfh+ryJOfFZpP2O30t7vqnFNoCZo Mrb+kBfjkB0NmAATCL56O/ktHg8MplhTps+VNi/JBRp+XOJ07IlLm9nAuGjeRpXlJ6nG vFAl7rfgwy5gDbI+2cufWxbhz48bBcMPprW5jdIOFp3ck6xToyiVTUur6weYPMzd2aNA Ti9NMXMF2dEcadhGWzcw+v3XF/wmrr22LUlZlMgZpi97+lZb/e0h0NNjMGvZ3RfngpK5 XOJQ== 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=6okvE7uC7mBDYDrWvZ0cqfGHbi6R3ezFCBMDjGZAc2A=; b=hZtz+YxWQZ5oc79e/XRyophH1HdVmJiHaAAWUlUx94S2DjgP1OPRD2iMqmO9CzoZto HN4yPvScQs8UN88141fHE/hFY0hP+bn+A7XMABbMy7zjLyXTw8awEMFK73oG32FtsOAR u+3Linyf17AML3wOhLzTQwA1P8dl0fxwWqjTZgOhNkAT1Hvy/+78gjVHdxbAwLxIbC3d 3mBXqAQfAOdvcFXcngW0UouMrkENB9GhQfC55kNwm9qv7kKXaZmpBXuOzgwKJ9moQ7uV QpG5DnR0L6mnT3DgVZS3NRcwuNdDWicuD1TisWUACH/YefR34wuoN1HAnYx5pbTHOrkm KwlA== X-Gm-Message-State: APjAAAV6j+Fwel02934MApk+8eLjR6vaL/wg9qH/0uNWEpEA1nqsGrIr TcHRcjSXrLHCw+urETSc60in7e2f1lo= X-Google-Smtp-Source: APXvYqw6hQChkvPXRT1MQ9XRhLxrZHGr8smNTYktS2ZvUuMHhO/R5CrRqKiwnUJwaudrznESRGtiTA== X-Received: by 2002:adf:d0c9:: with SMTP id z9mr16805099wrh.132.1551804662472; Tue, 05 Mar 2019 08:51:02 -0800 (PST) From: Peter Maydell To: qemu-devel@nongnu.org Date: Tue, 5 Mar 2019 16:50:36 +0000 Message-Id: <20190305165051.26860-8-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190305165051.26860-1-peter.maydell@linaro.org> References: <20190305165051.26860-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::436 Subject: [Qemu-devel] [PULL 07/22] target/arm: Rearrange disas_data_proc_reg 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Richard Henderson This decoding more closely matches the ARMv8.4 Table C4-6, Encoding table for Data Processing - Register Group. In particular, op2 =3D=3D 0 is now more than just Add/sub (with carry). Signed-off-by: Richard Henderson Message-id: 20190301200501.16533-7-richard.henderson@linaro.org Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- target/arm/translate-a64.c | 98 ++++++++++++++++++++++---------------- 1 file changed, 57 insertions(+), 41 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index eaeb43577df..12d2649c204 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -4494,11 +4494,10 @@ static void disas_data_proc_3src(DisasContext *s, u= int32_t insn) } =20 /* Add/subtract (with carry) - * 31 30 29 28 27 26 25 24 23 22 21 20 16 15 10 9 5 4 0 - * +--+--+--+------------------------+------+---------+------+-----+ - * |sf|op| S| 1 1 0 1 0 0 0 0 | rm | opcode2 | Rn | Rd | - * +--+--+--+------------------------+------+---------+------+-----+ - * [000000] + * 31 30 29 28 27 26 25 24 23 22 21 20 16 15 10 9 5 4 0 + * +--+--+--+------------------------+------+-------------+------+-----+ + * |sf|op| S| 1 1 0 1 0 0 0 0 | rm | 0 0 0 0 0 0 | Rn | Rd | + * +--+--+--+------------------------+------+-------------+------+-----+ */ =20 static void disas_adc_sbc(DisasContext *s, uint32_t insn) @@ -4506,11 +4505,6 @@ static void disas_adc_sbc(DisasContext *s, uint32_t = insn) unsigned int sf, op, setflags, rm, rn, rd; TCGv_i64 tcg_y, tcg_rn, tcg_rd; =20 - if (extract32(insn, 10, 6) !=3D 0) { - unallocated_encoding(s); - return; - } - sf =3D extract32(insn, 31, 1); op =3D extract32(insn, 30, 1); setflags =3D extract32(insn, 29, 1); @@ -5164,47 +5158,69 @@ static void disas_data_proc_2src(DisasContext *s, u= int32_t insn) } } =20 -/* Data processing - register */ +/* + * Data processing - register + * 31 30 29 28 25 21 20 16 10 0 + * +--+---+--+---+-------+-----+-------+-------+---------+ + * | |op0| |op1| 1 0 1 | op2 | | op3 | | + * +--+---+--+---+-------+-----+-------+-------+---------+ + */ static void disas_data_proc_reg(DisasContext *s, uint32_t insn) { - switch (extract32(insn, 24, 5)) { - case 0x0a: /* Logical (shifted register) */ - disas_logic_reg(s, insn); - break; - case 0x0b: /* Add/subtract */ - if (insn & (1 << 21)) { /* (extended register) */ - disas_add_sub_ext_reg(s, insn); + int op0 =3D extract32(insn, 30, 1); + int op1 =3D extract32(insn, 28, 1); + int op2 =3D extract32(insn, 21, 4); + int op3 =3D extract32(insn, 10, 6); + + if (!op1) { + if (op2 & 8) { + if (op2 & 1) { + /* Add/sub (extended register) */ + disas_add_sub_ext_reg(s, insn); + } else { + /* Add/sub (shifted register) */ + disas_add_sub_reg(s, insn); + } } else { - disas_add_sub_reg(s, insn); + /* Logical (shifted register) */ + disas_logic_reg(s, insn); } - break; - case 0x1b: /* Data-processing (3 source) */ - disas_data_proc_3src(s, insn); - break; - case 0x1a: - switch (extract32(insn, 21, 3)) { - case 0x0: /* Add/subtract (with carry) */ + return; + } + + switch (op2) { + case 0x0: + switch (op3) { + case 0x00: /* Add/subtract (with carry) */ disas_adc_sbc(s, insn); break; - case 0x2: /* Conditional compare */ - disas_cc(s, insn); /* both imm and reg forms */ - break; - case 0x4: /* Conditional select */ - disas_cond_select(s, insn); - break; - case 0x6: /* Data-processing */ - if (insn & (1 << 30)) { /* (1 source) */ - disas_data_proc_1src(s, insn); - } else { /* (2 source) */ - disas_data_proc_2src(s, insn); - } - break; + default: - unallocated_encoding(s); - break; + goto do_unallocated; } break; + + case 0x2: /* Conditional compare */ + disas_cc(s, insn); /* both imm and reg forms */ + break; + + case 0x4: /* Conditional select */ + disas_cond_select(s, insn); + break; + + case 0x6: /* Data-processing */ + if (op0) { /* (1 source) */ + disas_data_proc_1src(s, insn); + } else { /* (2 source) */ + disas_data_proc_2src(s, insn); + } + break; + case 0x8 ... 0xf: /* (3 source) */ + disas_data_proc_3src(s, insn); + break; + default: + do_unallocated: unallocated_encoding(s); break; } --=20 2.20.1