On Fri, 25 Oct 2019 at 10:57, Christophe Lyon
<christophe.l...@linaro.org> wrote:
>
> rt==15 is a special case when reading the flags: it means the
> destination is APSR. This patch avoids rejecting
> vmrs apsr_nzcv, fpscr
> as illegal instruction.
>
> Signed-off-by: Christophe Lyon <christophe.l...@linaro.org>
> ---
> target/arm/translate-vfp.inc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/target/arm/translate-vfp.inc.c b/target/arm/translate-vfp.inc.c
> index 9ae980b..82bed5b 100644
> --- a/target/arm/translate-vfp.inc.c
> +++ b/target/arm/translate-vfp.inc.c
> @@ -705,7 +705,7 @@ static bool trans_VMSR_VMRS(DisasContext *s,
> arg_VMSR_VMRS *a)
> * The only M-profile VFP vmrs/vmsr sysreg is FPSCR.
> * Writes to R15 are UNPREDICTABLE; we choose to undef.
> */
> - if (a->rt == 15 || a->reg != ARM_VFP_FPSCR) {
> + if (a->rt == 15 && (!a->l || a->reg != ARM_VFP_FPSCR)) {
> return false;
> }
> }
> --=
Applied to target-arm.next, thanks.
-- PMM
