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Wed, 28 Feb 2024 03:11:52 -0800 (PST) X-Google-Smtp-Source: AGHT+IGTf3K9q6xRH39rpRqR2qDPFI6fGvz8M7Pzxt0oAAekqpvkC3OPUE9+tqbgDDi3Wh1OYOHgjA== X-Received: by 2002:a17:906:a1d3:b0:a3f:5104:dabb with SMTP id bx19-20020a170906a1d300b00a3f5104dabbmr8176561ejb.63.1709118712462; Wed, 28 Feb 2024 03:11:52 -0800 (PST) Received: from [192.168.10.118] ([2001:b07:6468:f312:63a7:c72e:ea0e:6045]) by smtp.gmail.com with ESMTPSA id vq9-20020a170907a4c900b00a43faa5b314sm544013ejc.29.2024.02.28.03.11.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Feb 2024 03:11:51 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org Subject: [PATCH 0/4] target/i386: use TSTEQ/TSTNE in x86 frontend Date: Wed, 28 Feb 2024 12:11:47 +0100 Message-ID: <20240228111151.287738-1-pbonzini@redhat.com> X-Mailer: git-send-email 2.43.2 MIME-Version: 1.0 Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.088, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org The TSTEQ/TSTNE operations can be useful to evaluate many conditionals. They can be used to test the sign bit or equality to zero of a partial register, as well as to check individual bits in EFLAGS. Paolo Based-on: <20240228110641.287205-1-pbonzini@redhat.com> Paolo Bonzini (4): target/i386: use TSTEQ/TSTNE to test low bits target/i386: use TSTEQ/TSTNE to check flags target/i386: remove mask from CCPrepare tcg/optimize: optimize TSTNE using smask and zmask target/i386/tcg/translate.c | 115 ++++++++++++++++-------------------- tcg/optimize.c | 13 ++-- target/i386/tcg/emit.c.inc | 5 +- 3 files changed, 60 insertions(+), 73 deletions(-)