On 08/15/2018 01:16 PM, 2016 quekong wrote:
Hi, Florian.
There is a movement to replace table-driven stack unwinding with a conditional
branch after most function calls...
I am sorry I don't understand its meaning, forgive my poor knowledge
of dynamic prediction, I am reading relative materials these days,
could you explain a little more for this sentence, or give me some
keywords for google ?
See Herb Sutter, “Zero-overhead deterministic exceptions: Throwing
values”. (The “Zero-overhead” is misleading.)
programmers tend to misuse __builtin_expect ..
I believe you must have strong factual basis saying such words, I can
quite accept the CPU manufacturer's ignoring branch prediction hints
for some reasons, but not this,
We just removed a __builtin_except from the dynamic linker that
indicated the wrong way for more than a decade, maybe even two decades.
We have anymore that strongly suggest that you run in the C locale or in
a single-byte locale, neither of which are generally true these days.
Thanks,
Florian
