vbatts/llama.cpp
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slower f16c version, kep for reference

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Eve 2024-11-02 16:30:03 -04:00
parent fffe7e6204
commit f8dd133ce4
1 changed files with 8 additions and 2 deletions
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ggml/src/ggml-quants.c
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@ -4236,8 +4236,14 @@ void ggml_vec_dot_q4_0_q8_0(int n, float * restrict s, size_t bs, const void * r
__m128i p_2 = _mm_add_epi16(p16_2_0, p16_2_1);
p_2 = _mm_add_epi32(_mm_cvtepi16_epi32(_mm_bsrli_si128(p_2, 8)), _mm_cvtepi16_epi32(p_2));
const __m256 deltas = _mm256_set_m128(_mm_set1_ps(GGML_FP16_TO_FP32(x[ib + 1].d) * GGML_FP16_TO_FP32(y[ib + 1].d)),
_mm_set1_ps(GGML_FP16_TO_FP32(x[ib].d) * GGML_FP16_TO_FP32(y[ib].d)));
// TODO: if f16c
const __m128 del = _mm_cvtph_ps(_mm_set_epi16(0, 0, 0 , 0, x[ib + 1].d, y[ib + 1].d, x[ib].d, y[ib].d));
const __m128 del_mul = _mm_mul_ps(del, _mm_permute_ps(del, 0xB1)); // x.d*y.d
const __m256 deltas = _mm256_set_m128(_mm_permute_ps(del_mul, 0xFF), _mm_permute_ps(del_mul, 0x00));
// TODO: may be room to optimize here?
//const __m256 deltas = _mm256_set_m128(_mm_set1_ps(GGML_FP16_TO_FP32(x[ib + 1].d) * GGML_FP16_TO_FP32(y[ib + 1].d)),
//_mm_set1_ps(GGML_FP16_TO_FP32(x[ib].d) * GGML_FP16_TO_FP32(y[ib].d)));
accum = _mm256_add_ps(_mm256_mul_ps(deltas, _mm256_cvtepi32_ps(MM256_SET_M128I(p_2, p_1))), accum);
}