Date: Thu, 8 Oct 2015 16:35:07 +1100 From: Peter Jeremy <peter@rulingia.com> To: Konstantin Belousov <kib@FreeBSD.org> Cc: FreeBSD-arm@freebsd.org Subject: Re: svn commit: r288983 - in head/sys/arm: arm include Message-ID: <20151008053507.GD85040@server.rulingia.com> In-Reply-To: <201510070912.t979Co21054138@repo.freebsd.org> References: <201510070912.t979Co21054138@repo.freebsd.org>
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--8w3uRX/HFJGApMzv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable [moved from src-* lists] On 2015-Oct-07 09:12:50 +0000, Konstantin Belousov <kib@FreeBSD.org> wrote: >Log: > A follow-up to r288492. In fact, revert the mentioned commit for > pre-VFPv3 processors, since they do require software support code to > handle denormals. For VFPv3 and later, enable flush-to-zero if > hardware does not claim full denormals arithmetic support by VMVFR1_FZ > field in mvfr1 register. Is there any reason we can't re-enable denormals on ARM11 and use the existing softfloat code to handle the underflow exceptions? This is the approach SPARC uses to handle non-normalised numbers. --=20 Peter Jeremy --8w3uRX/HFJGApMzv Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQJ8BAEBCgBmBQJWFgCLXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRFRUIyOTg2QzMwNjcxRTc0RTY1QzIyN0Ux NkE1OTdBMEU0QTIwQjM0AAoJEBall6Dkogs0GgoP/iDraEB0L9K1UM1RzvN2g0dz LXcdw098z2T57t8/AAwUn1GE+rEhaPShnWEYAXmBdNiZCOkO2Supi8O5dGA0IYpf F14e+mYJlRS7hb5nfUETP/gYUB29pTQyIaovNf2TxZ7vx2rsSP4d7bfQiHxRmnNk EK8hZZvyBHTGKAF6Sz5BHBQYQ1/B11G04u1MNmlabwJPFX7mSQwJd7fYIA8JVRoN zGMNudpAaM9UpgApWDe9fHY2ExmzZrdxRrx/+c9/rZLf3Jng7IVD2Fkh+fADDyxC GOtW7FbIOVqIm7Lm8Fuyy5UikIU8MMKycXg2KIDUmHaM8WHVlFL0MC8YZITR4RXE mqH9bBzOko6B6oxdg5X5ASSLYtepd1tS1rDtRpsPuEa6xib8eLqMKdxQm7Pj3rjX zcnJxY/6LVg7p8EzCcIv2zVDf2IQxTKNy7b2L2G35Ijc+p4iGh5xQ5x0/8dyEwX+ b43wTMO28Ks5dCKYWfTPpKtU9lzZDUS2k2R4nWnnPssGR00vvbqqsItBAb3Lp955 mQ/HvCL0qp1uIpl+SVoY4y6mHW0o+f+v3S4+2WINpDRAp6f84HKtXqC81oGuGseP TosDv/Yyl22tPxJqA3yjbFcYXFLGsaQ/PoSbIgewJPRcY5qOPCocaWhaU11NyEd1 kWKaywepeKn0WhJCPtMu =WPqK -----END PGP SIGNATURE----- --8w3uRX/HFJGApMzv--
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