On 28/10/2022 9:05 am, Kinsey Moore wrote: > RTEMS may be booted from a dirty environment. Ensure that FPU trap > settings are consistent. > --- > bsps/aarch64/shared/start/start.S | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/bsps/aarch64/shared/start/start.S > b/bsps/aarch64/shared/start/start.S > index 8bd4f86f4e..de0fdf4c80 100644 > --- a/bsps/aarch64/shared/start/start.S > +++ b/bsps/aarch64/shared/start/start.S > @@ -307,6 +307,16 @@ _el1_start: > > /* FPU does not need to be enabled on AArch64 */ > > + /* Ensure FPU traps are disabled by default */ > + mrs x0, FPCR > + bic x0, x0, #(1 << 8) > + bic x0, x0, #(1 << 9) > + bic x0, x0, #(1 << 10) > + bic x0, x0, #(1 << 11) > + bic x0, x0, #(1 << 12) > + bic x0, x0, #(1 << 15)
Does `bic x0, x0, #((1 << 8) | (1 << 9) | (1 << 10) | ...)` work? The operand2 is a mask of bits to clear. Chris _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
