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[83.35.24.118]) by smtp.gmail.com with ESMTPSA id q201sm8089020wme.2.2021.09.22.11.41.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 22 Sep 2021 11:41:11 -0700 (PDT) Message-ID: <5e1286b2-83c7-db59-a4db-02af7c7dbcd2@amsat.org> Date: Wed, 22 Sep 2021 20:41:10 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0 Subject: Re: [PATCH v3 07/30] tcg/loongarch64: Implement necessary relocation operations Content-Language: en-US To: WANG Xuerui , qemu-devel@nongnu.org References: <20210922180927.666273-1-git@xen0n.name> <20210922180927.666273-8-git@xen0n.name> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= In-Reply-To: <20210922180927.666273-8-git@xen0n.name> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2a00:1450:4864:20::42d; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-wr1-x42d.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.248, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no 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 , Richard Henderson , Laurent Vivier Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 9/22/21 20:09, WANG Xuerui wrote: > Signed-off-by: WANG Xuerui > Reviewed-by: Richard Henderson > --- > tcg/loongarch64/tcg-target.c.inc | 66 ++++++++++++++++++++++++++++++++ > 1 file changed, 66 insertions(+) > +/* Field Sk16, shifted right by 2; suitable for conditional jumps */ > +#define R_LOONGARCH_BR_SK16 256 > +/* Field Sd10k16, shifted right by 2; suitable for B and BL */ > +#define R_LOONGARCH_BR_SD10K16 257 > + > +static bool reloc_br_sk16(tcg_insn_unit *src_rw, const tcg_insn_unit *target) > +{ > + const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); > + intptr_t offset = (intptr_t)target - (intptr_t)src_rx; > + > + tcg_debug_assert((offset & 3) == 0); > + offset >>= 2; > + if (offset == sextreg(offset, 0, 16)) { > + *src_rw |= (offset << 10) & 0x3fffc00; Alternatively easier to read: *src_rw = deposit64(*src_rw , 10, 16, offset); > + return true; > + } > + > + return false; > +}