ikawrakow/ik_llama.cpp
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Fix q4_0_r8 also on Zen4

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Iwan Kawrakow
2025-11-13 12:52:25 +02:00
parent 2396c41ef8
commit d296ab79be
1 changed files with 4 additions and 4 deletions
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8
ggml/src/iqk/iqk_gemm_legacy_quants.cpp
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@@ -1100,7 +1100,7 @@ static void mul_mat_q4_0_r8_q8_2(int n, const void * vx, size_t bx, const DataIn
return;
}
GGML_ASSERT(nrc_x%16 == 0);
Q8<nrc_y, block_q8_1_x4> q8(info);
Q8<nrc_y, block_q8_2_x4> q8(info);
auto m4 = _mm512_set1_epi8(0xf);
int nb = n / QK4_NL;
__m512 acc[2*nrc_y] = {};
@@ -1158,10 +1158,10 @@ static void mul_mat_q4_0_r8_q8_2(int n, const void * vx, size_t bx, const DataIn
for (int iy = 0; iy < nrc_y; ++iy) {
auto qy = (const block_q8_1 *)q8.y[iy];
auto sumi = dot(qy[ib].qs);
ggml_bf16_t d{qy[ib].d}, s{qy[ib].s};
auto dy = _mm512_set1_ps(GGML_BF16_TO_FP32(d));
auto [d8, m8] = ScaleHelperQ8_2::prepare1(qy + ib);
auto dy = _mm512_set1_ps(d8);
acc[2*iy+0] = _mm512_fmadd_ps(_mm512_mul_ps(scales, dy), _mm512_cvtepi32_ps(sumi), acc[2*iy+0]);
acc[2*iy+1] = _mm512_fmadd_ps(scales, _mm512_set1_ps(GGML_BF16_TO_FP32(s)), acc[2*iy+1]);
acc[2*iy+1] = _mm512_fmadd_ps(scales, _mm512_set1_ps(m8), acc[2*iy+1]);
}
}
for (int iy = 0; iy < nrc_y; ++iy) {