Re: [PATCH v3 0/3] arm64: Add two HWCAPs for Arm v8.7 FP behaviour
From: Marc Zyngier <maz@kernel.org>
Date: 2021-12-10 17:33:41
On Fri, 10 Dec 2021 16:54:29 +0000, Joey Gouly [off-list ref] wrote:
This series adds new HWCAPs for two Arm v8.7 features:
- FEAT_AFP: Alternate floating-point behavior for specific
floating point instructions.
- FEAT_RPRES: Increased precision of Reciprocal Estimate and
Reciprocal Square Root Estimate from an 8-bit mantissa to a
12-bit mantissa.
These features can be enabled by userspace by setting some new bits
in FPCR. These new bits are FPCR.{NEP, AH, FIZ}. Since these must be
explicitly enabled by userspace, this should not affect existing
applications.For the series: Acked-by: Marc Zyngier <maz@kernel.org> M. -- Without deviation from the norm, progress is not possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel