[DiscordArchive] Does anybody know what this operator does in c++?
[DiscordArchive] Does anybody know what this operator does in c++?
Original source
damn I hate that language so much for that bullshit
rektbyfaith
05-15-2019, 05:10 PM #21Archived author: Skarn • Posted: 2019-05-15T17:10:04.485000+00:00
Original source
damn I hate that language so much for that bullshit
Original source
yes, but at least not inline assembly and defined by intel, not the vendors
rektbyfaith
05-15-2019, 05:10 PM #22Archived author: schlumpf • Posted: 2019-05-15T17:10:13.925000+00:00
Original source
yes, but at least not inline assembly and defined by intel, not the vendors
Original source
it isn't a language issue thoguh? you can write perfectly platform independent code that does that.
rektbyfaith
05-15-2019, 05:10 PM #23Archived author: schlumpf • Posted: 2019-05-15T17:10:31.726000+00:00
Original source
it isn't a language issue thoguh? you can write perfectly platform independent code that does that.
Original source
it is just an utterly low level optimization
rektbyfaith
05-15-2019, 05:10 PM #24Archived author: schlumpf • Posted: 2019-05-15T17:10:38.281000+00:00
Original source
it is just an utterly low level optimization
Original source
yeah, but you are allowed to write non-platform independent code
rektbyfaith
05-15-2019, 05:10 PM #25Archived author: Skarn • Posted: 2019-05-15T17:10:47.116000+00:00
Original source
yeah, but you are allowed to write non-platform independent code
Original source
that's the issue
rektbyfaith
05-15-2019, 05:10 PM #26Archived author: Skarn • Posted: 2019-05-15T17:10:48.748000+00:00
Original source
that's the issue
Original source
and the code that is not using any WInAPI stuff or whatever
rektbyfaith
05-15-2019, 05:11 PM #27Archived author: Skarn • Posted: 2019-05-15T17:11:02.406000+00:00
Original source
and the code that is not using any WInAPI stuff or whatever
Original source
just general purpose code that is not crossplatform because the language gives freedom to compilers in their own implementation of things
rektbyfaith
05-15-2019, 05:11 PM #28Archived author: Skarn • Posted: 2019-05-15T17:11:23.848000+00:00
Original source
just general purpose code that is not crossplatform because the language gives freedom to compilers in their own implementation of things
Original source
```
unsigned int msb32(unsigned int x)
{
for (unsigned int m = 31; m; --m)
{
if (x & (1 << m)) return m;
}
}
```
rektbyfaith
05-15-2019, 05:17 PM #29Archived author: schlumpf • Posted: 2019-05-15T17:17:24.694000+00:00
Original source
```
unsigned int msb32(unsigned int x)
{
for (unsigned int m = 31; m; --m)
{
if (x & (1 << m)) return m;
}
}
```
Original source
as you see, it doesn't optimize to a single instruction, which is why the library author decided that he would prefer performance over portability.
rektbyfaith
05-15-2019, 05:18 PM #30Archived author: schlumpf • Posted: 2019-05-15T17:18:59.354000+00:00
Original source
as you see, it doesn't optimize to a single instruction, which is why the library author decided that he would prefer performance over portability.
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