faster athlon/duron memory copy implementation

Athlon XP 1800+, VIA KT333, 256MB DDR2100

Athlon test program $Id: fast.c,v 1.6 2000/09/23 09:05:45 arjan Exp $

copy_page() tests

copy_page function 'warm up run'         took 16180 cycles per page
copy_page function '2.4 non MMX'         took 17913 cycles per page
copy_page function '2.4 MMX fallback'    took 18610 cycles per page
copy_page function '2.4 MMX version'     took 16200 cycles per page
copy_page function 'faster_copy'         took 9908 cycles per page
copy_page function 'even_faster'         took 10117 cycles per page
copy_page function 'no_prefetch'         took 6993 cycles per page

[harm@pchome memcpy2]$ ./memcpy
Athlon test program $Id: fast.c,v 1.6 2000/09/23 09:05:45 arjan Exp $

copy_page() tests

copy_page function 'warm up run'         took 16293 cycles per page
copy_page function '2.4 non MMX'         took 17929 cycles per page
copy_page function '2.4 MMX fallback'    took 18637 cycles per page
copy_page function '2.4 MMX version'     took 16209 cycles per page
copy_page function 'faster_copy'         took 9907 cycles per page
copy_page function 'even_faster'         took 10122 cycles per page
copy_page function 'no_prefetch'         took 6964 cycles per page

harm@pchome memcpy2]$ cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 6
model name : AMD Athlon(TM) XP 1800+
stepping : 2
cpu MHz : 1532.941
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat
pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
bogomips : 3060.53