CODEWITHSUNDEEP
c++intelssesimd128-bit
user2120196
user2120196

Reputation: 61

Can I store only 96 bit of 128 with SSE instructions?

_mm_store_ps stores (for example) 128 bit in a 4 float elements of an array.

Can I store only 96 bit? or rather, only first 3 byte in 3 elements of array? (with SSE instuctions)

I explained myself badly: I do not want to mask the bits. I would like to store only the first 3 bytes, without copying the remaining 32 bits. Without overwriting beyond the memory

Upvotes: 2

Views: 829

Answers (1)

Marat Dukhan
Marat Dukhan

Reputation: 12263

You can do it with _mm_maskmoveu_si128 (SSE2) or _mm_maskstore_ps (AVX). However, you shouldn't expect good performance from these instructions.

Upvotes: 4

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