| To: | "David S. Miller" <davem@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [RFC] enhanced version of net_random() |
| From: | Andi Kleen <ak@xxxxxxx> |
| Date: | Sun, 22 Aug 2004 17:04:14 +0200 |
| Cc: | root@xxxxxxxxxxxxxxxxxx, adilger@xxxxxxxxxxxxx, jlcooke@xxxxxxxxxxxxxx, shemminger@xxxxxxxx, alan@xxxxxxxxxxxxxxxxxxx, tytso@xxxxxxx, netdev@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx |
| In-reply-to: | <20040820124823.071ac1d9.davem@redhat.com> |
| References: | <20040812104835.3b179f5a@dell_ss3.pdx.osdl.net> <20040820175952.GI5806@certainkey.com> <20040820185956.GV8967@schnapps.adilger.int> <Pine.LNX.4.53.0408201518250.25319@chaos> <20040820124823.071ac1d9.davem@redhat.com> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
On Fri, 20 Aug 2004 12:48:23 -0700 "David S. Miller" <davem@xxxxxxxxxx> wrote: > > I wouldn't suggest converting it to 'C' because the rotation > > takes many CPU instructions when one tries to do the test, shift, > > and OR in 'C', > > You only need 2 'shifts' and an 'or' to do a rotate in C. > No tests are needed. gcc is clever enough to detect the common C patterns for rotate and generate a real ROL when the CPU supports it. -Andi |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: 2.6.8-rc4-bk1 problem: unregister_netdevice: waiting for ppp0, Voluspa |
|---|---|
| Next by Date: | [PATCH] prism54: fix wpa_supplicant frequency parsing, Luis R. Rodriguez |
| Previous by Thread: | Re: [RFC] enhanced version of net_random(), Jean-Luc Cooke |
| Next by Thread: | Re: [RFC] enhanced version of net_random(), Stephen Hemminger |
| Indexes: | [Date] [Thread] [Top] [All Lists] |