Re: [Qemu-arm] [Qemu-devel] [PATCH 18/26] target/arm: Set FPCCR.S when executing M-profile floating point insns

[Richard Henderson]

On 4/16/19 5:57 AM, Peter Maydell wrote:
> The M-profile FPCCR.S bit indicates the security status of
> the floating point context. In the pseudocode ExecuteFPCheck()
> function it is unconditionally set to match the current
> security state whenever a floating point instruction is
> executed.
> 
> Implement this by adding a new TB flag which tracks whether
> FPCCR.S is different from the current security state, so
> that we only need to emit the code to update it in the
> less-common case when it is not already set correctly.
> 
> Note that we will add the handling for the other work done
> by ExecuteFPCheck() in later commits.
> 
> Signed-off-by: Peter Maydell <address@hidden>
> ---
>  target/arm/cpu.h       |  2 ++
>  target/arm/translate.h |  1 +
>  target/arm/helper.c    |  5 +++++
>  target/arm/translate.c | 20 ++++++++++++++++++++
>  4 files changed, 28 insertions(+)

Reviewed-by: Richard Henderson <address@hidden>


r~