Is asm code selection optimal?
tg at gmplib.org
Tue May 16 21:27:28 UTC 2017
"Marco Bodrato" <bodrato at mail.dm.unipi.it> writes:
I'm not sure I'm able to understand what exactly the columns report...
I expected the "default" column always equivalent to one of the other ones...
But it sometimes is worst than all alternatives...
default x86_64 coreisbr core2
divrem_1.asm divrem_1.asm divrem_1.asm
1 70.0224 34.3025 37.2641 37.6082
2 42.3045 22.0282 23.7997 24.3283
3 30.4712 19.5858 19.5641 19.8066
4 24.7977 16.3102 17.6666 17.7169
Do you think it may make sense to also add a column with the C version?
And in the case you quote I'd assume the default is actually the C code,
i.e., that the config did not pick up any asm.
I'm bored by the manual asm config, and hopefully this new
measure-and-report stuff could be improved to suggest reconfig.
Please encrypt, key id 0xC8601622
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