ikawrakow/ik_llama.cpp
1
0
Fork 0
mirror of https://github.com/ikawrakow/ik_llama.cpp.git synced 2026-02-25 07:34:10 +00:00
Code Issues Packages Projects Releases Wiki Activity

iq4_k_r4: slightly faster on Zen4

Browse Source
This commit is contained in:
Iwan Kawrakow
2024-12-10 14:38:25 +02:00
parent 361174ee6a
commit 4ca6bb2d4d
1 changed files with 12 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
ggml/src/iqk/iqk_mul_mat.cpp
View File

@@ -3173,7 +3173,8 @@ static void mul_mat_q4_k_r4_q8_k(int n, const void * vx, size_t bx, const DataIn
int nbl = n / QK_K;
using helper_t = union { __m512i vec; uint32_t val[16]; };
helper_t hd, hm;
__m512 acc[2*nrc_y] = {};
__m512 acc[nrc_y] = {};
__m512 d4s[nrc_y];
__m512i qx[4];
for (int ix = 0; ix < nrc_x; ix += 8) {
const block_q4_k_r4 * iq4l = (const block_q4_k_r4 *)((const char *)vx + (ix+0)*bx);
@@ -3186,7 +3187,11 @@ static void mul_mat_q4_k_r4_q8_k(int n, const void * vx, size_t bx, const DataIn
auto dh = _mm256_castps256_ps128(d2);
auto mh = _mm256_extractf128_ps(d2, 1);
auto d4 = _mm512_insertf32x8(_mm512_castps256_ps512(_mm256_set_m128(dl, dl)), _mm256_set_m128(dh, dh), 1);
for (int iy = 0; iy < nrc_y; ++iy) {
d4s[iy] = _mm512_mul_ps(d4, _mm512_set1_ps(q8.scale(iy, ibl)));
}
auto m4 = _mm512_insertf32x8(_mm512_castps256_ps512(_mm256_set_m128(ml, ml)), _mm256_set_m128(mh, mh), 1);
m4 = _mm512_mul_ps(m4, _mm512_set1_ps(-0.5f));
auto slbits_l = _mm256_loadu_si256((const __m256i *)iq4l[ibl].scales_l);
auto shbits_l = _mm256_loadu_si256((const __m256i *)iq4h[ibl].scales_l);
auto slb = _mm512_inserti32x8(_mm512_castsi256_si512(slbits_l), shbits_l, 1);
@@ -3205,7 +3210,7 @@ static void mul_mat_q4_k_r4_q8_k(int n, const void * vx, size_t bx, const DataIn
auto scales1 = _mm256_cvtepi8_epi32(_mm_set1_epi32(hd.val[ib+0]));
auto scales2 = _mm256_cvtepi8_epi32(_mm_set1_epi32(hd.val[ib+8]));
auto iscales = _mm512_inserti32x8(_mm512_castsi256_si512(scales1), scales2, 1);
auto scales = _mm512_mul_ps(d4, _mm512_cvtepi32_ps(iscales));
auto scales = _mm512_cvtepi32_ps(iscales);
scales1 = _mm256_cvtepi8_epi32(_mm_set1_epi32(hm.val[ib+0]));
scales2 = _mm256_cvtepi8_epi32(_mm_set1_epi32(hm.val[ib+8]));
iscales = _mm512_inserti32x8(_mm512_castsi256_si512(scales1), scales2, 1);
@@ -3226,20 +3231,18 @@ static void mul_mat_q4_k_r4_q8_k(int n, const void * vx, size_t bx, const DataIn
sumi = _mm512_dpbusd_epi32(sumi, qx[1], _mm512_shuffle_epi32(y, _MM_PERM_ENUM(0x55)));
sumi = _mm512_dpbusd_epi32(sumi, qx[2], _mm512_shuffle_epi32(y, _MM_PERM_ENUM(0xaa)));
sumi = _mm512_dpbusd_epi32(sumi, qx[3], _mm512_shuffle_epi32(y, _MM_PERM_ENUM(0xff)));
float d8 = q8.scale(iy, ibl);
acc[iy] = _mm512_fmadd_ps(_mm512_mul_ps(scales, d4s[iy]), _mm512_cvtepi32_ps(sumi), acc[iy]);
float m8 = ((const float *)q8.y[iy][ibl].bsums)[ib];
acc[2*iy+0] = _mm512_fmadd_ps(_mm512_mul_ps(scales, _mm512_set1_ps(d8)), _mm512_cvtepi32_ps(sumi), acc[2*iy+0]);
acc[2*iy+1] = _mm512_fmadd_ps(scales_m, _mm512_set1_ps(m8), acc[2*iy+1]);
acc[iy] = _mm512_fmadd_ps(scales_m, _mm512_set1_ps(m8), acc[iy]);
}
}
}
for (int iy = 0; iy < nrc_y; ++iy) {
auto sum512 = _mm512_fmadd_ps(_mm512_set1_ps(-0.5f), acc[2*iy+1], acc[2*iy+0]);
acc[2*iy+0] = acc[2*iy+1] = _mm512_setzero_ps();
auto sum1 = _mm_add_ps(_mm512_extractf32x4_ps(sum512, 0), _mm512_extractf32x4_ps(sum512, 1));
auto sum2 = _mm_add_ps(_mm512_extractf32x4_ps(sum512, 2), _mm512_extractf32x4_ps(sum512, 3));
auto sum1 = _mm_add_ps(_mm512_extractf32x4_ps(acc[iy], 0), _mm512_extractf32x4_ps(acc[iy], 1));
auto sum2 = _mm_add_ps(_mm512_extractf32x4_ps(acc[iy], 2), _mm512_extractf32x4_ps(acc[iy], 3));
info.store(ix+0, iy, sum1);
info.store(ix+4, iy, sum2);
acc[iy] = _mm512_setzero_ps();
}
}
}