Re: [Qemu-devel] [PATCH 21/26] target/arm: New function armv7m_nvic_set_pending_lazyfp()

[Richard Henderson]

On 4/16/19 5:57 AM, Peter Maydell wrote:
> In the v7M architecture, if an exception is generated in the process
> of doing the lazy stacking of FP registers, the handling of
> possible escalation to HardFault is treated differently to the normal
> approach: it works based on the saved information about exception
> readiness that was stored in the FPCCR when the stack frame was
> created. Provide a new function armv7m_nvic_set_pending_lazyfp()
> which pends exceptions during lazy stacking, and implements
> this logic.
> 
> This corresponds to the pseudocode TakePreserveFPException().
> 
> Signed-off-by: Peter Maydell <address@hidden>
> ---
>  target/arm/cpu.h      | 12 ++++++
>  hw/intc/armv7m_nvic.c | 96 +++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 108 insertions(+)

Reviewed-by: Richard Henderson <address@hidden>


r~