[Mesa-dev] [PATCH 2/2] gallium/os: fix os_time_get_nano() to roll over less
jfonseca at vmware.com
Fri Aug 18 10:47:06 UTC 2017
On 18/08/17 08:23, Frank Richter wrote:
> On 17.08.2017 02:34, Brian Paul wrote:
>>> BTW, I wonder if we would win by using lldiv(). Because this is often
>>> use for performance measurements, so these extra division might add some
>> Frank, do you want to look into that? In the mean time, I'll push the
>> patches as-is.
> AFAICS, the lldiv implementation in the MSVC runtime (also used by
> MinGW) simply does “a = num / denom; b = num % denom;” as well, so it
> seems unlikely that lldiv() would give a benefit here.
I see. I thought they would try do something smarter to leverage the
ISA ability to compute both at the same time, but I suppose that's left
to the compiler to figure out. Thanks for checking.
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