diff --git a/ggml/src/ggml-cpu/arch-fallback.h b/ggml/src/ggml-cpu/arch-fallback.h index f476127995b2b..0bfb92df17909 100644 --- a/ggml/src/ggml-cpu/arch-fallback.h +++ b/ggml/src/ggml-cpu/arch-fallback.h @@ -73,7 +73,6 @@ #define ggml_vec_dot_tq1_0_q8_K_generic ggml_vec_dot_tq1_0_q8_K #define ggml_vec_dot_tq2_0_q8_K_generic ggml_vec_dot_tq2_0_q8_K #define ggml_vec_dot_iq1_m_q8_K_generic ggml_vec_dot_iq1_m_q8_K -#define ggml_vec_dot_mxfp4_q8_0_generic ggml_vec_dot_mxfp4_q8_0 // repack.cpp #define ggml_quantize_mat_q8_0_4x4_generic ggml_quantize_mat_q8_0_4x4 #define ggml_quantize_mat_q8_0_4x8_generic ggml_quantize_mat_q8_0_4x8 diff --git a/ggml/src/ggml-cpu/arch/powerpc/quants.c b/ggml/src/ggml-cpu/arch/powerpc/quants.c index 49aae7a23bba4..d3dfd049eaf14 100644 --- a/ggml/src/ggml-cpu/arch/powerpc/quants.c +++ b/ggml/src/ggml-cpu/arch/powerpc/quants.c @@ -278,6 +278,72 @@ void ggml_vec_dot_q4_1_q8_1(int n, float * GGML_RESTRICT s, size_t bs, const voi #endif } +void ggml_vec_dot_mxfp4_q8_0(int n, float * GGML_RESTRICT s, size_t bs, const void * GGML_RESTRICT vx, size_t bx, const void * GGML_RESTRICT vy, size_t by, int nrc) { + assert(nrc == 1); + UNUSED(nrc); + UNUSED(bx); + UNUSED(by); + UNUSED(bs); + assert(n % QK_MXFP4 == 0); + static_assert(QK_MXFP4 == QK8_0, "QK_MXFP4 and QK8_0 must be the same"); + + const block_mxfp4 * GGML_RESTRICT x = vx; + const block_q8_0 * GGML_RESTRICT y = vy; + + const int nb = n / QK_MXFP4; + + int ib = 0; + float sumf = 0; + +#if defined(__POWER9_VECTOR__) + const vector signed char lowMask = vec_splats((signed char)0xF); + const vector unsigned char vshift4 = vec_splats((unsigned char)4); + vector float vsumf0 = vec_splats(0.0f); + + vector signed char kv = vec_xl(0, (const signed char *)kvalues_mxfp4); + +#pragma GCC unroll 8 + for (; ib < nb; ++ib) { + __builtin_prefetch(x[ib].qs, 0, 1); + __builtin_prefetch(y[ib].qs, 0, 1); + + vector float vyd = vec_splats(GGML_CPU_FP16_TO_FP32(y[ib].d) * + GGML_E8M0_TO_FP32_HALF(x[ib].e)); + + vector signed char q8y0 = vec_xl( 0, y[ib].qs); + vector signed char q8y1 = vec_xl(16, y[ib].qs); + + vector signed char qxs = (vector signed char)vec_xl(0, x[ib].qs); + + vector unsigned char lo_nibbles = (vector unsigned char)vec_and(qxs, lowMask); + vector unsigned char hi_nibbles = (vector unsigned char)vec_sr(qxs, vshift4); + + vector signed char q4x0 = vec_perm(kv, kv, lo_nibbles); + vector signed char q4x1 = vec_perm(kv, kv, hi_nibbles); + + vector signed short qv0 = vec_add(vec_mule(q4x0, q8y0), vec_mulo(q4x0, q8y0)); + vector signed short qv1 = vec_add(vec_mule(q4x1, q8y1), vec_mulo(q4x1, q8y1)); + + vector signed int vsumi0 = vec_splats((int32_t)0); + vsumi0 = vec_sum4s(qv0, vsumi0); + vsumi0 = vec_sum4s(qv1, vsumi0); + + vsumf0 = vec_madd(vec_ctf(vsumi0, 0), vyd, vsumf0); + } + + vsumf0 = vec_add(vsumf0, vec_sld(vsumf0, vsumf0, 4)); + vsumf0 = vec_add(vsumf0, vec_sld(vsumf0, vsumf0, 8)); + sumf = vec_extract(vsumf0, 0); + *s = sumf; +#else + UNUSED(x); + UNUSED(y); + UNUSED(ib); + UNUSED(sumf); + ggml_vec_dot_mxfp4_q8_0_generic(n, s, bs, vx, bx, vy, by, nrc); +#endif +} + void ggml_vec_dot_q5_0_q8_0(int n, float * GGML_RESTRICT s, size_t bs, const void * GGML_RESTRICT vx, size_t bx, const void * GGML_RESTRICT vy, size_t by, int nrc) { const int qk = QK8_0; const int nb = n / qk;