On 03/27/10 19:34, ольга крыжановская wrote:
I am looking for a Sun Studio C example for inline SPARC assembler
which uses the VIS 'block copy' instruction to move a block of<n>
bytes. Has anyone time to write such an example for me, please?
Olga
In general, be very cautious in going down this route. The optimum
(or even working) sequence of instructions can and will vary across
platforms, so what works well on one family of CPUs may be distinctly
non-optimal on another.
The libc mem* routines already use VIS instructions to good effect on
SPARC platforms, and platform teams regularly enhance these functions
for both existing and new hardware.
If you decide to pursue this, consider using the new linker capabilities
code that Rod Evans recently integrated; this allows the runtime
linker to select the appropriate version of your routine for the
current platform.
- Bart
--
Bart Smaalders Solaris Kernel Performance
bart.smaald...@oracle.com http://blogs.sun.com/barts
"You will contribute more with mercurial than with thunderbird."
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