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([71.212.132.216]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f855f15231sm107430885ad.220.2024.06.18.22.50.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Jun 2024 22:50:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1718776203; x=1719381003; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Q87yEelvlvLrbbH45z9fgatLb5Vc2yZq2nrn8gRhdVI=; b=WGDdx2kVk1rRyT0ipJNnsSheCfVWFhj7PuHOPMz5M7k0BoPuXAG0TH5uEJ3CZ16U+Q F/aDEfTuQWvmeSi3+SLi3aZJ+TskLs2HIK0GLmStsH6hgjJcyaQDvC6Fl54wA+e+OwDd 4hjENLcF8nHW+7XjUEb4auFaPL4FSsD7JdwvgmiHK8YZY/pL/nmzm7F9QUYlADphb1WN /SnsGcyPWHyCu1tFkoLqxRc9PgsrumYKQfCoevCP7bP75VR7m4LgeDBoPzTSA7OCxezy r0VMo1QBc7pjbk52M1VTLqyxnA4NhhNWlPTkoZ7RDLg4LlX8jZUVW5tWAO2mPyu+LT5X usuA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718776203; x=1719381003; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Q87yEelvlvLrbbH45z9fgatLb5Vc2yZq2nrn8gRhdVI=; b=VTlhRCp/t6hXNiHoYJMADzQyPlTv2qSTN4cc2/LPjZl0wLKlDzSyhHJ7Jd3FhWlzKH nEo7nRDgggpQhFbt/Kg0dUCYGVkjtZPLDpPSscJ+RCOsewCsAQSnyZvB7sLHW/GqdWYH CiBKUS7xE06VY0E6TOpQYqSZwpVLbEyV46g63Y58YCt/SADCzLihY2+zjIhJ8xSjXvys TyEOt5kxSWD3/qbLqf9XUoZMTfpI0S5zwNoh9aIRj838WC/prH5+StZJxrhaB0uPjMLE g9dz/j5Q8255705wXO0p0DPjazxyH3hE3YXob/hZQQYtpp8vtCXbE+XsnRkpG5G3avL1 NR4Q== X-Gm-Message-State: AOJu0YxZGMztp519syzChkaSHh4BcKINLG9QX3UimkDLhClVWSVs8Lmh 5acC4vpo6HtrVoKSJ/+LPKLNRWaJD0FSEhbQqnxpsnLbtIgT7KF3AX0VwP2C61NUpKhO4LyHsqh C X-Google-Smtp-Source: AGHT+IFmcFRat3hc5Hc84QMPp6j0HN8hw4EIVYty/OrX2EjtCgp5ITwp5Ml9HE/sPGiwrAVYA297Lw== X-Received: by 2002:a05:6a20:968e:b0:1b6:bb61:3784 with SMTP id adf61e73a8af0-1bcbb60d5b2mr1776280637.55.1718776203444; Tue, 18 Jun 2024 22:50:03 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: gaosong@loongson.cn Subject: [PATCH v2] tcg/loongarch64: Fix tcg_out_movi vs some pcrel pointers Date: Tue, 18 Jun 2024 22:50:02 -0700 Message-Id: <20240619055002.119042-1-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 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::52f; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x52f.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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 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-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1718776258128100003 Content-Type: text/plain; charset="utf-8" Simplify the logic for two-part, 32-bit pc-relative addresses. Rather than assume all such fit in int32_t, do some arithmetic and assert a result, do some arithmetic first and then check to see if the pieces are in range. Reported-by: Song Gao Signed-off-by: Richard Henderson Reviewed-by: Song Gao --- Hi Song. I was not thrilled by the "goto out" that you introduced in 20240618125044.687443-1-gaosong@loongson.cn Instead, I copied the logic from tcg/aarch64/ for adrp+add. r~ --- tcg/loongarch64/tcg-target.c.inc | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) diff --git a/tcg/loongarch64/tcg-target.c.inc b/tcg/loongarch64/tcg-target.= c.inc index 7ca52d0248..e915e97bba 100644 --- a/tcg/loongarch64/tcg-target.c.inc +++ b/tcg/loongarch64/tcg-target.c.inc @@ -382,8 +382,7 @@ static void tcg_out_movi(TCGContext *s, TCGType type, T= CGReg rd, * back to the slow path. */ =20 - intptr_t pc_offset; - tcg_target_long val_lo, val_hi, pc_hi, offset_hi; + intptr_t src_rx, pc_offset; tcg_target_long hi12, hi32, hi52; =20 /* Value fits in signed i32. */ @@ -393,24 +392,23 @@ static void tcg_out_movi(TCGContext *s, TCGType type,= TCGReg rd, } =20 /* PC-relative cases. */ - pc_offset =3D tcg_pcrel_diff(s, (void *)val); - if (pc_offset =3D=3D sextreg(pc_offset, 0, 22) && (pc_offset & 3) =3D= =3D 0) { - /* Single pcaddu2i. */ - tcg_out_opc_pcaddu2i(s, rd, pc_offset >> 2); - return; + src_rx =3D (intptr_t)tcg_splitwx_to_rx(s->code_ptr); + if ((val & 3) =3D=3D 0) { + pc_offset =3D val - src_rx; + if (pc_offset =3D=3D sextreg(pc_offset, 0, 22)) { + /* Single pcaddu2i. */ + tcg_out_opc_pcaddu2i(s, rd, pc_offset >> 2); + return; + } } =20 - if (pc_offset =3D=3D (int32_t)pc_offset) { - /* Offset within 32 bits; load with pcalau12i + ori. */ - val_lo =3D sextreg(val, 0, 12); - val_hi =3D val >> 12; - pc_hi =3D (val - pc_offset) >> 12; - offset_hi =3D val_hi - pc_hi; - - tcg_debug_assert(offset_hi =3D=3D sextreg(offset_hi, 0, 20)); - tcg_out_opc_pcalau12i(s, rd, offset_hi); + pc_offset =3D (val >> 12) - (src_rx >> 12); + if (pc_offset =3D=3D sextreg(pc_offset, 0, 20)) { + /* Load with pcalau12i + ori. */ + tcg_target_long val_lo =3D val & 0xfff; + tcg_out_opc_pcalau12i(s, rd, pc_offset); if (val_lo !=3D 0) { - tcg_out_opc_ori(s, rd, rd, val_lo & 0xfff); + tcg_out_opc_ori(s, rd, rd, val_lo); } return; } --=20 2.34.1