On Friday, 8 May 2020 at 13:56:18 UTC, kinke wrote:
On Friday, 8 May 2020 at 13:30:42 UTC, Marcio Martins wrote:
I saw the intel-intrinsics package, but unfortunately it stops
at SEE3 and I need SSE4.2 for this.
How is this library working?
It's open source. :)
I know, but I don't have time to implement it and make it pretty,
I am prototyping with very little time.
Will LDC/LLVM detect the name and replace it with the right
instructions? If so, could I just provide an empty
_mm_crc32_u8 and it'd pick it up correctly?
Nope. But take a look at ldc.gccbuiltins_x86, it offers these 4
builtins:
int __builtin_ia32_crc32hi(int, short);
int __builtin_ia32_crc32si(int, int);
int __builtin_ia32_crc32qi(int, byte);
long __builtin_ia32_crc32di(long, long);
Make sure to compile with `-mattr=+sse4.2` to enable these
instructions.
YES! Thank you, this is exactly what I was looking for.
I suppose I will have to implement a scalar version for DMD
later... I don't even know why I bother with DMD...
