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([71.212.132.216]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f98f8f8c42sm39183765ad.162.2024.06.19.14.00.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Jun 2024 14:00:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1718830816; x=1719435616; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=V+5WPOQQn7wdJFBxPC03WeaiWKObhZXvJYhNjI8CS4I=; b=zHAo2QIQYJDkGsYuQh7Ekaa3n31GljJLlAlSfEhV40V8BzV0GEwWl8MdwmqcaI5Gqg PXeKHG75DK+fLuVZsuBHxBltqoaQU7YPIVS/hPR8LXJoMH7XF7waBo7MfY96VQrTfHKc JmtwPJ9rZY8vdj+C6sh+on0FxFEBfTGtKpKqBfECljq+//8ArTT87MP+Xk2JdOOauXwB 4OjyzT6ghxcD/KVpDfvjlBMvmGVMRMmEhTmkoF7rxOvBNY3Yr0oMQTMAzqJz+khPE9XP k9X4pGQMPMFRe2zGK/aatFYrMndALD/kKNz/OKbA+1U+3bnTBD5WT5QA+44lay78xnB8 iHTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718830816; x=1719435616; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=V+5WPOQQn7wdJFBxPC03WeaiWKObhZXvJYhNjI8CS4I=; b=W9BpkqBMyGIgp3gwiejOTG3lrVabiAMhHcdBQD9qGm0CW8Lcc5WMg6tSfp6piNqLBG njEI9xbKocHFPJaFAmshYw9ad19ZuemBH8twcTiKB4n2f8+4dW4klb53vQ56UcbQhEBE GN1yKuWmKGb6gMVG6rsrcxAyKQtvPYGyFYfw5zEVdOWV/91D16sOw1Pi2KTFlTXBTSF7 lDhJCwrNHDbrGFXau2+sZ9K3qR4s9c+RZroZdPpnJWQSORgm253SFf1EZ2LK8QSOjfr1 5xUgMHwACuZ0sm4NBCiBjGbsNHW+5cqIJ2p4P5/qEHRxpLvz4LNFXc0qfatgk+GDV5zf H5KQ== X-Gm-Message-State: AOJu0Yx9yRPzbZEbFIpnW3rmiZNrf4dpTJDONHPCx6+KJCR2Y6Zd8sz0 yVgiQLbF98uraj0rHkOxHnQosbPUY9D9gCAEzPMNmk9w9Dyr6mAPN3xLD0xLnu8NgQ3OBFWLk/S 2 X-Google-Smtp-Source: AGHT+IEufdJCehTRpbxjxsFUisYn/l1HnyqVkOFALrM8B761KPN4s8cWRplJH6vQbQ0YPpWfDZaqeQ== X-Received: by 2002:a05:6a20:7929:b0:1b8:a2ca:3b6d with SMTP id adf61e73a8af0-1bcbb5d4cfamr3375701637.37.1718830815679; Wed, 19 Jun 2024 14:00:15 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Song Gao Subject: [PULL 24/24] tcg/loongarch64: Fix tcg_out_movi vs some pcrel pointers Date: Wed, 19 Jun 2024 13:59:52 -0700 Message-Id: <20240619205952.235946-25-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240619205952.235946-1-richard.henderson@linaro.org> References: <20240619205952.235946-1-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::431; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x431.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=unavailable 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: 1718830888840100013 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. Cc: qemu-stable@nongnu.org Fixes: dacc51720db ("tcg/loongarch64: Implement tcg_out_mov and tcg_out_mov= i") Reviewed-by: Song Gao Reported-by: Song Gao Signed-off-by: Richard Henderson --- 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 1c4dc4decb..5b7ed5c176 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