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UPSTREAM PR #19575: ggml-cpu: arm64: Fix wrong memcpy length for q4_K block_interleave == 4 #1173

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UPSTREAM PR #19575: ggml-cpu: arm64: Fix wrong memcpy length for q4_K block_interleave == 4 #1173

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5 changes: 3 additions & 2 deletions ggml/src/ggml-cpu/repack.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1916,9 +1916,10 @@ static block_q4_Kx8 make_block_q4_Kx8(block_q4_K * in, unsigned int blck_size_in
int src_offset = (i / 8) * blck_size_interleave;
int dst_offset = i * blck_size_interleave;

// buffer large enough for the max interleave block size (8 bytes)
uint64_t elems;
memcpy(&elems, &in[src_id].qs[src_offset], sizeof(uint64_t));
memcpy(&out.qs[dst_offset], &elems, sizeof(uint64_t));
memcpy(&elems, &in[src_id].qs[src_offset], blck_size_interleave);
memcpy(&out.qs[dst_offset], &elems, blck_size_interleave);
}

// The below logic is designed so as to unpack and rearrange scales and mins values in Q4_K
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