[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 12/15] target/arm: Don't calculate lr in arm_v7m_cpu
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 12/15] target/arm: Don't calculate lr in arm_v7m_cpu_do_interrupt() until needed |
Date: |
Wed, 2 Aug 2017 17:43:58 +0100 |
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 <address@hidden>
---
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
- Re: [Qemu-devel] [Qemu-arm] [PATCH 14/15] armv7m_nvic.h: Move from include/hw/arm to include/hw/intc, (continued)