Message ID | 20190820210720.18976-15-richard.henderson@linaro.org |
---|---|
State | New |
Headers | show
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[97.113.7.119]) by smtp.gmail.com with ESMTPSA id k22sm21690743pfk.157.2019.08.20.14.07.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Aug 2019 14:07:40 -0700 (PDT) From: Richard Henderson <richard.henderson@linaro.org> To: qemu-devel@nongnu.org Date: Tue, 20 Aug 2019 14:07:17 -0700 Message-Id: <20190820210720.18976-15-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190820210720.18976-1-richard.henderson@linaro.org> References: <20190820210720.18976-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::641 Subject: [Qemu-devel] [PATCH v5 14/17] target/arm: Hoist store to cs_base in cpu_get_tb_cpu_state X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: <qemu-devel.nongnu.org> List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>, <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe> List-Archive: <https://lists.nongnu.org/archive/html/qemu-devel> List-Post: <mailto:qemu-devel@nongnu.org> List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help> List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>, <mailto:qemu-devel-request@nongnu.org?subject=subscribe> Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" <qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org> |
Series |
target/arm: Reduce overhead of cpu_get_tb_cpu_state
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expand
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diff --git a/target/arm/helper.c b/target/arm/helper.c index 19bdb9b9d6..7a94495788 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -11187,6 +11187,7 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc, { uint32_t flags, pstate_for_ss; + *cs_base = 0; flags = rebuild_hflags_internal(env); if (is_a64(env)) { @@ -11260,7 +11261,6 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc, } *pflags = flags; - *cs_base = 0; } #ifdef TARGET_AARCH64
By performing this store early, we avoid having to save and restore the register holding the address around any function calls. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- target/arm/helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)