Date: Fri, 20 Jun 2014 06:06:25 +1000 From: Peter Jeremy <peter@rulingia.com> To: =?utf-8?B?5byg5pmX?= <zganghanhan@foxmail.com> Cc: freebsd-net <freebsd-net@freebsd.org> Subject: Re: pow function in kernel space Message-ID: <20140619200625.GB3631@server.rulingia.com> In-Reply-To: <tencent_34C23E3A7E7FDFEA644A3392@qq.com> References: <mailman.75.1403092802.14182.freebsd-net@freebsd.org> <tencent_34C23E3A7E7FDFEA644A3392@qq.com>
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--T4sUOijqQbZv57TR Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2014-Jun-19 20:40:48 +0800, =E5=BC=A0=E6=99=97 <zganghanhan@foxmail.com>= wrote: >how can I implement, in an efficient, way the pow() function in kernel spa= ce ? Is there any function I can use o r how I can evaluate pow function i= n kernel model? Since the kernel only offers integer arithmetic, one approach would be square and multiply. What are you trying to do? Maybe we can offer an alternative to pow(3). --=20 Peter Jeremy --T4sUOijqQbZv57TR Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQJ8BAEBCgBmBQJTo0LBXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRFRUIyOTg2QzMwNjcxRTc0RTY1QzIyN0Ux NkE1OTdBMEU0QTIwQjM0AAoJEBall6Dkogs09oIP/1QbHPJ7urM3D6SkHbP74mBb 6Pg6vDGcnjy7QbFxFe11+qjfkIKdd3N2M5VbF+5QqI2nA1hCcGEsd6E83SkhE3v9 SqrgS+sq/JZ7/pgeYPEVqtJWucpDkYmkItNV3krZlHVGF6GK7j4yEsCzm0dMOo65 jJuFUv2pKJAzGRcKNPCWUYMQ8F80EjkGVzo4fm+8MsBG8c0Xy/SaRDCJtonBTIHj jEAcGyh8TqWgs8dX1tsQzLGT/tuzkF0eqO5p5RZfW/CQwGSjlz/bw/12i+mBRlXm rzVDSvFSI0dBczJcRoviDzbPU9UXDprFev2pfOb5TL9GTinkfJqL+IjaTwp2Fcu5 PkmlN2Cypa4jl1igXeiVNqjuuRBTmyJ2jpywn8UtO/HD1AX6dUJ8RuOxXB1IXpau HwPXcdT1Iq2u5QW1U3Q4yWl+VPm0yTYDIMZL7Bfji+xyRvLIcznbNEIDOzncJg5g SToMTQGrOu7paAy6s7cDfZ/T/HKeoP4fNbldBPhG+yBzWKIjt+cnmebuSnS1mi66 0FTHXfqhQdQ6XHr7Jn1wqnCUThsMBHhzHCruuNsyJVMo5MQw13Tq97TbHSXTsrtW 8SJqxQNnZMhSgMS57U9Y/PViK2/O/C9IaIWuDancpm/0hPVPyffhlMNuIl7hr+pu wmdAsp6U2XlvVSrn2mJ4 =4POu -----END PGP SIGNATURE----- --T4sUOijqQbZv57TR--
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