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[174.21.72.5]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f46ad93c2esm28165935ad.263.2024.05.26.12.43.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 26 May 2024 12:43:22 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: mark.cave-ayland@ilande.co.uk Subject: [PATCH v2 35/37] target/sparc: Implement MWAIT Date: Sun, 26 May 2024 12:42:52 -0700 Message-Id: <20240526194254.459395-36-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240526194254.459395-1-richard.henderson@linaro.org> References: <20240526194254.459395-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::536; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x536.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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé --- target/sparc/insns.decode | 1 + target/sparc/translate.c | 11 +++++++++++ 2 files changed, 12 insertions(+) diff --git a/target/sparc/insns.decode b/target/sparc/insns.decode index a7720560f8..fbcb4f7aef 100644 --- a/target/sparc/insns.decode +++ b/target/sparc/insns.decode @@ -124,6 +124,7 @@ CALL 01 i:s30 WRTICK_CMPR 10 10111 110000 ..... . ............. @n_r_ri WRSTICK 10 11000 110000 ..... . ............. @n_r_ri WRSTICK_CMPR 10 11001 110000 ..... . ............. @n_r_ri + WRMWAIT 10 11100 110000 ..... . ............. @n_r_ri ] # Before v8, rs1==0 was WRY, and the rest executed as nop. [ diff --git a/target/sparc/translate.c b/target/sparc/translate.c index e3e92bcf83..dba0eaa30c 100644 --- a/target/sparc/translate.c +++ b/target/sparc/translate.c @@ -3344,6 +3344,17 @@ static void do_wrpowerdown(DisasContext *dc, TCGv src) TRANS(WRPOWERDOWN, POWERDOWN, do_wr_special, a, supervisor(dc), do_wrpowerdown) +static void do_wrmwait(DisasContext *dc, TCGv src) +{ + /* + * TODO: This is a stub version of mwait, which merely recognizes + * interrupts immediately and does not wait. + */ + dc->base.is_jmp = DISAS_EXIT; +} + +TRANS(WRMWAIT, VIS4, do_wr_special, a, true, do_wrmwait) + static void do_wrpsr(DisasContext *dc, TCGv src) { gen_helper_wrpsr(tcg_env, src);