From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49460) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dcwl7-0003WX-0P for qemu-devel@nongnu.org; Wed, 02 Aug 2017 12:44:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dcwl6-0004hb-6K for qemu-devel@nongnu.org; Wed, 02 Aug 2017 12:44:33 -0400 From: Peter Maydell Date: Wed, 2 Aug 2017 17:43:58 +0100 Message-Id: <1501692241-23310-13-git-send-email-peter.maydell@linaro.org> In-Reply-To: <1501692241-23310-1-git-send-email-peter.maydell@linaro.org> References: <1501692241-23310-1-git-send-email-peter.maydell@linaro.org> Subject: [Qemu-devel] [PATCH 12/15] target/arm: Don't calculate lr in arm_v7m_cpu_do_interrupt() until needed List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: patches@linaro.org Move the code in arm_v7m_cpu_do_interrupt() that calculates the magic LR value down to when we're actually going to use it. Having the calculation and use so far apart makes the code a little harder to understand than it needs to be. Signed-off-by: Peter Maydell --- target/arm/helper.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/target/arm/helper.c b/target/arm/helper.c index b64ddb1..0ecc8f1 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -6311,13 +6311,6 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs) arm_log_exception(cs->exception_index); - lr = 0xfffffff1; - if (env->v7m.control & R_V7M_CONTROL_SPSEL_MASK) { - lr |= 4; - } - if (env->v7m.exception == 0) - lr |= 8; - /* For exceptions we just mark as pending on the NVIC, and let that handle it. */ switch (cs->exception_index) { @@ -6408,6 +6401,14 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs) return; /* Never happens. Keep compiler happy. */ } + lr = 0xfffffff1; + if (env->v7m.control & R_V7M_CONTROL_SPSEL_MASK) { + lr |= 4; + } + if (env->v7m.exception == 0) { + lr |= 8; + } + v7m_push_stack(cpu); v7m_exception_taken(cpu, lr); qemu_log_mask(CPU_LOG_INT, "... as %d\n", env->v7m.exception); -- 2.7.4