Subject: Re: copyin/out
To: Allen Briggs <>
From: Ben Harris <>
List: port-arm
Date: 08/11/2002 21:58:24
On Sun, 11 Aug 2002, Ben Harris wrote:

> More experimentation.  I've replaced runs of STR and LDR with STM and
> LDM, tweaking the register usage in copyin to make the runs longer.  The
> diff's attached.
> Same test as ever: dd if=/dev/zero of=/dev/null count=1024 bs=1024k

With an extra hack, it works on 26-bit machines as well:

ARM3, 25 MHz, 4KB unified cache:
bjh21old: 1073741824 bytes transferred in 984.083 secs (1091109 bytes/sec)
bjh21:    1073741824 bytes transferred in 198.960 secs (5396772 bytes/sec)

I'll commit this in a moment (Jason seems to think this is OK).

Ben Harris                                                   <>
Portmaster, NetBSD/acorn26           <URL:>