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error: invalid static_cast from type ‘__m256i’ {aka ‘__vector(4) long long int’} to type ‘void*’
I'm trying to compile a piece of code where it calls uses static_cast to do something like the following:
__m256i values;
int64_t i = 1;
static_cast<void*>(values + i);
but this results i...
David
Votes: 0
Answers: 0
how to use _mm_mask_add_ps instruction correctly?
I wrote the test code as below. If I set mask 0b1111 or 0b0000, it works fine. If I use the mask combined with 01, 0b1101 0b1001..., the program crashed. A SIGILL signal which means illegal instructio...
HLI
Votes: 0
Answers: 0
Performance differences in SIMD operations across different CPU architectures
I see an important performance difference between a SIMD-based sum reduction versus its scalar counterpart across different CPU architectures.
The problematic function is simple; you receive a 16-byte...
AAA
Votes: 0
Answers: 0
Fastest way to multiply and sum/add two arrays (dot product) - unaligned surprisingly faster than FMA
Hi I have the following code:
public unsafe class MultiplyAndAdd : IDisposable
{
float[] rawFirstData = new float[1024];
float[] rawSecondData = new float[1024];
static int alignment = 32...
Peter
Votes: 0
Answers: 1
