Displaying 4 results from an estimated 4 matches for "mavx512f".
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avx512f
2020 May 18
2
Use Galois field New Instructions (GFNI) to combine affine instructions
...ces we could extend this
to bigger inputs/outputs (eg. 32x32 for CRC32-like functions would be nice)
Thanks for any help!
Regards,
[1] https://en.wikipedia.org/wiki/AVX-512#GFNI
[2] https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=gf2p&expand=2901
[3] if you wonder why not -mavx512f , see section about current issues below
[4]
https://software.intel.com/content/www/us/en/develop/articles/intel-software-development-emulator.html
[5]
https://github.com/aguinet/llvm-project/commit/9ed424cbac0fe3566f801167e2190fad5ad07507#diff-3a29c490bdd8d147d4044818c2da0509R308
[6]
https://rizme...
2016 Jun 13
2
Loop vectorizer Queires
Hello,
I have a few issues in vectorizing loops using Clang 3.8.
Will it be ok if I shoot some of my findings and queries here?
Meanwhile, can I please know if LLVM support autovectorized MIC
instructions for Xeon phi?
If so, could you please tell me the flags to use?
I am Jumana, a masters student in Embedded system working as a graduate
research intern with Intel. For my thesis, I am working
2020 May 04
3
LV: predication
...the "outer mask" of a tail-folded loop.
The following code
void foo(int N, int *restrict c, int *restrict a, int *restrict b) {
#pragma clang loop vectorize(enable) interleave(disable)
for (int i = 0; i < N; i++) {
a[i] = b[i] + c[i];
}
}
compiled with clang --target=x86_64 -mavx512f -mllvm -prefer-predicate-over-epilog -emit-llvm -O2 emits the following IR
vector.body: ; preds = %vector.body, %for.body.preheader.new
%index = phi i64 [ 0, %for.body.preheader.new ], [ %index.next.1, %vector.body ]
%niter = phi i64 [ %unroll_iter, %for.bo...
2020 May 04
3
LV: predication
> The harm comes if the intrinsic ends up with the wrong value, or attached to the wrong loop.
The intrinsic is marked as IntrNoDuplicate, so I wasn't worried about it ending up somewhere else. Also, it is a property of a specific loop, a tail-folded vector loop, that holds even after it is transformed I think. I.e. unrolling a vector loop is probably not what you want, but even if you do