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[174.21.143.238]) by smtp.gmail.com with ESMTPSA id p12sm17927642pfq.69.2020.06.23.12.37.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Jun 2020 12:37:13 -0700 (PDT) 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 :mime-version:content-transfer-encoding; bh=vTCb/+JBTsRkBioBgq12HWwp1QoPq+XXUl9Yc9AuV4g=; b=KUPvLJbNSc801mbX205g3IWjHsgwWICYKYiYfWPXI00YKXV1T2Ih9/IF5DSYD1ItjQ XhBloOL5rCGw6ztEsUgtbPp5RFlNm5PKAniO1df5jTBGszQQG7gxslCu0mTJYMqnXhvS dN2RKqfTbjTUXZw3VbzXlkDin7Y5wvOokiQ4vblZpLVeXBC5vG93JtnPEWPKxbIDKunb eVaST1AYtDDEe2C+zKgB0HVTb8plZBYWcR7qS/9wpXCWkivvvIrChvRq1gIjoGytf/NL rGzAiiona7IhZo1ODMbeinYfBJmGhVWz67YXRVIYwtXga06CLGkFO+gGuvhSu7662wGc nwUA== 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:mime-version:content-transfer-encoding; bh=vTCb/+JBTsRkBioBgq12HWwp1QoPq+XXUl9Yc9AuV4g=; b=kt1sgkVXgRGmxZlFoyXYkF2oT12meoVM+PDINHGO7ForPfClMQ/Qkk89UUh554MIsF UouDghNuQBEvEJVCAicahjU3B9AoWExMu/B0QX0uawNeLxM3KuZkSvUd2P765uAeI4Aj 5NwVRwl79EKgAkTFxesTeYC5im142hEb8JyeX5WP7wO48jGYcbmF6nwq9zPZwzrUv2OX hU+iEmGC9wg+ZRSlqR74op2+yt+BISCGHFLQQLc5H366Bs5IXEQtxW7d6Z/EDMeSfBGz 6a83zMYCMPb1IohNGcWpu15oa6/FABeA2nqrm4C2Dg8U32w/h7o5O9Xhb1ASMyic85Ax gYAg== X-Gm-Message-State: AOAM5323Lb5/SPWF92y4BJiS+Qou6Xa+g8jUDmNjg/OzlLCLso8mqkox 3z6K/xgxTcUIKagZHG4jpKXuTU36VQQ= X-Google-Smtp-Source: ABdhPJxacp0tppHKmQVl3BlPOTrKCXxrmOb+E158iM+6pWeoEyQ/Ha5HNS0GVqH6+PvJB5tSEkA8tw== X-Received: by 2002:a63:b915:: with SMTP id z21mr19382355pge.145.1592941034148; Tue, 23 Jun 2020 12:37:14 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v8 10/45] target/arm: Revise decoding for disas_add_sub_imm Date: Tue, 23 Jun 2020 12:36:23 -0700 Message-Id: <20200623193658.623279-11-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200623193658.623279-1-richard.henderson@linaro.org> References: <20200623193658.623279-1-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=2607:f8b0:4864:20::544; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x544.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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=_AUTOLEARN 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: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org, david.spickett@linaro.org, steplong@quicinc.com 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" The current Arm ARM has adjusted the official decode of "Add/subtract (immediate)" so that the shift field is only bit 22, and bit 23 is part of the op1 field of the parent category "Data processing - immediate". Suggested-by: Peter Maydell Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/translate-a64.c | 23 ++++++++--------------- 1 file changed, 8 insertions(+), 15 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 14d51c0dd1..59f44fc412 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -3754,22 +3754,22 @@ static void disas_pc_rel_adr(DisasContext *s, uint3= 2_t insn) /* * Add/subtract (immediate) * - * 31 30 29 28 24 23 22 21 10 9 5 4 0 - * +--+--+--+-----------+-----+-------------+-----+-----+ - * |sf|op| S| 1 0 0 0 1 |shift| imm12 | Rn | Rd | - * +--+--+--+-----------+-----+-------------+-----+-----+ + * 31 30 29 28 23 22 21 10 9 5 4 0 + * +--+--+--+-------------+--+-------------+-----+-----+ + * |sf|op| S| 1 0 0 0 1 0 |sh| imm12 | Rn | Rd | + * +--+--+--+-------------+--+-------------+-----+-----+ * * sf: 0 -> 32bit, 1 -> 64bit * op: 0 -> add , 1 -> sub * S: 1 -> set flags - * shift: 00 -> LSL imm by 0, 01 -> LSL imm by 12 + * sh: 1 -> LSL imm by 12 */ static void disas_add_sub_imm(DisasContext *s, uint32_t insn) { int rd =3D extract32(insn, 0, 5); int rn =3D extract32(insn, 5, 5); uint64_t imm =3D extract32(insn, 10, 12); - int shift =3D extract32(insn, 22, 2); + bool shift =3D extract32(insn, 22, 1); bool setflags =3D extract32(insn, 29, 1); bool sub_op =3D extract32(insn, 30, 1); bool is_64bit =3D extract32(insn, 31, 1); @@ -3778,15 +3778,8 @@ static void disas_add_sub_imm(DisasContext *s, uint3= 2_t insn) TCGv_i64 tcg_rd =3D setflags ? cpu_reg(s, rd) : cpu_reg_sp(s, rd); TCGv_i64 tcg_result; =20 - switch (shift) { - case 0x0: - break; - case 0x1: + if (shift) { imm <<=3D 12; - break; - default: - unallocated_encoding(s); - return; } =20 tcg_result =3D tcg_temp_new_i64(); @@ -4174,7 +4167,7 @@ static void disas_data_proc_imm(DisasContext *s, uint= 32_t insn) case 0x20: case 0x21: /* PC-rel. addressing */ disas_pc_rel_adr(s, insn); break; - case 0x22: case 0x23: /* Add/subtract (immediate) */ + case 0x22: /* Add/subtract (immediate) */ disas_add_sub_imm(s, insn); break; case 0x24: /* Logical (immediate) */ --=20 2.25.1