From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4B44C38BFF for ; Mon, 24 Feb 2020 22:37:03 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 795562176D for ; Mon, 24 Feb 2020 22:37:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="tF5EoHy5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 795562176D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:45578 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j6MLW-0002Ky-MX for qemu-devel@archiver.kernel.org; Mon, 24 Feb 2020 17:37:02 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:37955) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j6M7o-0004Xp-Pt for qemu-devel@nongnu.org; Mon, 24 Feb 2020 17:22:54 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j6M7n-0005us-Cv for qemu-devel@nongnu.org; Mon, 24 Feb 2020 17:22:52 -0500 Received: from mail-pg1-x543.google.com ([2607:f8b0:4864:20::543]:46341) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1j6M7n-0005uN-6V for qemu-devel@nongnu.org; Mon, 24 Feb 2020 17:22:51 -0500 Received: by mail-pg1-x543.google.com with SMTP id y30so5817897pga.13 for ; Mon, 24 Feb 2020 14:22:51 -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 :mime-version:content-transfer-encoding; bh=Jm8KlY79fmi10gEwUaheKwxsBU3LYmbPeN5QBjFnnb0=; b=tF5EoHy5mkqDGJ11etcAOiB0Np57GLPUdwsPK1yz19pH0koGH/STl2Yc73VDAWUgAh NdMaFiBTz/m0AgPc41k0z+WeYCY7EoYDLsq+ttMBFy95yDu0iyl8EBY+nQ1AiBYyuWPB owt6cWmAv/x+1NU12HAuE+eaMv6RydEtWKiTi95pALW1Q3zEBPY9kkL/hJVBZHNE6Jd5 5FlAuAYCr+VouSgI+8lUb6FZCo8DP4zjcZ7w59QZBng0cUjQun7RUdcCEMOPMbLx1A9v YtnMTi3yiQTJXWJT/T2VF0kWoPmUKxPlqwL3bm4YM5b2ewvHkTf/a2N++NnCmt721GlC TVUA== 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=Jm8KlY79fmi10gEwUaheKwxsBU3LYmbPeN5QBjFnnb0=; b=RxmscznJrQEcYEYPaSag40yF7v8JP2v4dEdZr8xlHLxLyxaM6DwxgAzydS9I1zzWm8 zWcP16/ESR0NDPi2x7zCWfjsqesBhz8rnc+MsTG4fJZPJD1zFiZd1+BKMCfhjeT1d9q6 ms9hphNby7gCylFqwojUeLiwgyrT2Hq6BUjyacZAEquET7Al4d4nD8N4UjHsW37k4rKo iEGPOMs2Ca1XQCBrULObMx6yu/VCFFg+cnLFV9rjrk6O+q+UqG4gPNW78Ic2FPvuQY2a i4kUD9xVCZsg62fvWnzyixM9zlgP9rqym3uhjdlHThGdmVib/XDsGsVsl7R3OiWijn1T U1Mg== X-Gm-Message-State: APjAAAX0Bvh8kQS/LushH/M4sBIDwIveCsLuXf0PRXB0tTaLxJAC8Dfr J2eziG7PKH9NBtVi4YpuGoPT8wrYQ2s= X-Google-Smtp-Source: APXvYqzXHK7wmq7szzmDa9BJUqt40iM7rniCQefQiXXJlK6vHVoA+Wec/8IM+dH34W3/iSFAOBzKOw== X-Received: by 2002:a62:ab06:: with SMTP id p6mr29829193pff.52.1582582969821; Mon, 24 Feb 2020 14:22:49 -0800 (PST) Received: from localhost.localdomain (97-126-123-70.tukw.qwest.net. [97.126.123.70]) by smtp.gmail.com with ESMTPSA id o6sm13897097pgg.37.2020.02.24.14.22.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Feb 2020 14:22:49 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 12/17] target/arm: Move the vfp decodetree calls next to the base isa Date: Mon, 24 Feb 2020 14:22:27 -0800 Message-Id: <20200224222232.13807-13-richard.henderson@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200224222232.13807-1-richard.henderson@linaro.org> References: <20200224222232.13807-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::543 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 Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Have the calls adjacent as an intermediate step toward actually merging the decodes. Signed-off-by: Richard Henderson --- v2: Fix fallthrough in disas_arm_insn vs vfp insns. --- target/arm/translate.c | 83 +++++++++++++++--------------------------- 1 file changed, 29 insertions(+), 54 deletions(-) diff --git a/target/arm/translate.c b/target/arm/translate.c index 5b7cad1ea2..6259064ea7 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -2646,31 +2646,6 @@ static void gen_neon_dup_high16(TCGv_i32 var) tcg_temp_free_i32(tmp); } -/* - * Disassemble a VFP instruction. Returns nonzero if an error occurred - * (ie. an undefined instruction). - */ -static int disas_vfp_insn(DisasContext *s, uint32_t insn) -{ - /* - * If the decodetree decoder handles this insn it will always - * emit code to either execute the insn or generate an appropriate - * exception; so we don't need to ever return non-zero to tell - * the calling code to emit an UNDEF exception. - */ - if (extract32(insn, 28, 4) == 0xf) { - if (disas_vfp_uncond(s, insn)) { - return 0; - } - } else { - if (disas_vfp(s, insn)) { - return 0; - } - } - /* If the decodetree decoder didn't handle this insn, it must be UNDEF */ - return 1; -} - static inline bool use_goto_tb(DisasContext *s, target_ulong dest) { #ifndef CONFIG_USER_ONLY @@ -10778,7 +10753,9 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn) ARCH(5); /* Unconditional instructions. */ - if (disas_a32_uncond(s, insn)) { + /* TODO: Perhaps merge these into one decodetree output file. */ + if (disas_a32_uncond(s, insn) || + disas_vfp_uncond(s, insn)) { return; } /* fall back to legacy decoder */ @@ -10805,13 +10782,6 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn) } return; } - if ((insn & 0x0f000e10) == 0x0e000a00) { - /* VFP. */ - if (disas_vfp_insn(s, insn)) { - goto illegal_op; - } - return; - } if ((insn & 0x0e000f00) == 0x0c000100) { if (arm_dc_feature(s, ARM_FEATURE_IWMMXT)) { /* iWMMXt register transfer. */ @@ -10842,7 +10812,9 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn) arm_skip_unless(s, cond); } - if (disas_a32(s, insn)) { + /* TODO: Perhaps merge these into one decodetree output file. */ + if (disas_a32(s, insn) || + disas_vfp(s, insn)) { return; } /* fall back to legacy decoder */ @@ -10852,11 +10824,10 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn) case 0xd: case 0xe: if (((insn >> 8) & 0xe) == 10) { - /* VFP. */ - if (disas_vfp_insn(s, insn)) { - goto illegal_op; - } - } else if (disas_coproc_insn(s, insn)) { + /* VFP, but failed disas_vfp. */ + goto illegal_op; + } + if (disas_coproc_insn(s, insn)) { /* Coprocessor. */ goto illegal_op; } @@ -10945,7 +10916,14 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn) ARCH(6T2); } - if (disas_t32(s, insn)) { + /* + * TODO: Perhaps merge these into one decodetree output file. + * Note disas_vfp is written for a32 with cond field in the + * top nibble. The t32 encoding requires 0xe in the top nibble. + */ + if (disas_t32(s, insn) || + disas_vfp_uncond(s, insn) || + ((insn >> 28) == 0xe && disas_vfp(s, insn))) { return; } /* fall back to legacy decoder */ @@ -10962,17 +10940,15 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn) goto illegal_op; /* op0 = 0b11 : unallocated */ } - if (disas_vfp_insn(s, insn)) { - if (((insn >> 8) & 0xe) == 10 && - dc_isar_feature(aa32_fpsp_v2, s)) { - /* FP, and the CPU supports it */ - goto illegal_op; - } else { - /* All other insns: NOCP */ - gen_exception_insn(s, s->pc_curr, EXCP_NOCP, - syn_uncategorized(), - default_exception_el(s)); - } + if (((insn >> 8) & 0xe) == 10 && + dc_isar_feature(aa32_fpsp_v2, s)) { + /* FP, and the CPU supports it */ + goto illegal_op; + } else { + /* All other insns: NOCP */ + gen_exception_insn(s, s->pc_curr, EXCP_NOCP, + syn_uncategorized(), + default_exception_el(s)); } break; } @@ -10995,9 +10971,8 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn) goto illegal_op; } } else if (((insn >> 8) & 0xe) == 10) { - if (disas_vfp_insn(s, insn)) { - goto illegal_op; - } + /* VFP, but failed disas_vfp. */ + goto illegal_op; } else { if (insn & (1 << 28)) goto illegal_op; -- 2.20.1