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[SYCL] Fix DMMV dequantization (#9279)

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Fixed dmmv dequant for ncols== GGML_SYCL_DMMV_X
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Ouadie EL FAROUKI 2024-09-04 16:26:33 +01:00 committed by GitHub
parent c8671ae282
commit 5910ea9427
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1 changed files with 2 additions and 2 deletions
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ggml/src/ggml-sycl/dmmv.cpp
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@ -76,8 +76,8 @@ static void dequantize_mul_mat_vec(const void * __restrict__ vx, const dfloat *
}
// sum up partial sums and write back result
#pragma unroll
for (int mask = WARP_SIZE / 2; mask > 0; mask >>= 1) {
const int mask_start = ncols > GGML_SYCL_DMMV_X ? WARP_SIZE >> 1 : WARP_SIZE >> 2;
for (int mask = mask_start; mask > 0; mask >>= 1) {
tmp +=
dpct::permute_sub_group_by_xor(item_ct1.get_sub_group(), tmp, mask);
}