Attempt to fix AVX2 FA (ikawrakow#807)

Co-authored-by: Iwan Kawrakow <[email protected]>

Author: ikawrakow

ggml/src/iqk/fa/iqk_fa_templates.h

@@ -226,7 +226,8 @@ struct HelperQ8KV final : public BaseHelper {
 struct HelperQ80 final : public BaseHelper {
     using Base = BaseHelper;
     constexpr static ggml_type type = GGML_TYPE_Q8_0;
-#ifdef HAVE_FANCY_SIMD
+//#ifdef HAVE_FANCY_SIMD
+#ifdef __AVX2__
     using block_q8 = block_q8_2;
     constexpr static int block_size_q = QK8_2;
 #else

ggml/src/iqk/iqk_gemm_legacy_quants.cpp

@@ -3299,9 +3299,12 @@ inline std::pair<mul_mat_t, int> mul_mat_kernel(int int_typeA, int nq) {
         if (nq == 4) return std::make_pair(mul_mat_qX_0_q8_2_Tx<Q8_0_1_Unpacker, 4, k_step>, 4);
         MAKE_FUNCS(mul_mat_qX_1_q8_2_T<Q8_0_1_Unpacker, nq);
 #else
-        if (nq == 1) return std::make_pair(mul_mat_qX_0_q8_0_Tx<Q8_0_Unpacker, 1, k_step>, 1);
-        if (nq == 2) return std::make_pair(mul_mat_qX_0_q8_0_Tx<Q8_0_Unpacker, 2, k_step>, 2);
-        if (nq == 4) return std::make_pair(mul_mat_qX_0_q8_0_Tx<Q8_0_Unpacker, 4, k_step>, 4);
+        //if (nq == 1) return std::make_pair(mul_mat_qX_0_q8_0_Tx<Q8_0_Unpacker, 1, k_step>, 1);
+        //if (nq == 2) return std::make_pair(mul_mat_qX_0_q8_0_Tx<Q8_0_Unpacker, 2, k_step>, 2);
+        //if (nq == 4) return std::make_pair(mul_mat_qX_0_q8_0_Tx<Q8_0_Unpacker, 4, k_step>, 4);
+        if (nq == 1) return std::make_pair(mul_mat_qX_0_q8_0_T<Q8_0_Unpacker, 1, block_q8_2>, 1);
+        if (nq == 2) return std::make_pair(mul_mat_qX_0_q8_0_T<Q8_0_Unpacker, 2, block_q8_2>, 2);
+        if (nq == 4) return std::make_pair(mul_mat_qX_0_q8_0_T<Q8_0_Unpacker, 4, block_q8_2>, 4);
         if (nq == 3) return std::make_pair(mul_mat_qX_0_q8_0_T<Q8_0_Unpacker, 3, block_q8_2>, 3);
         if (nq == 5) return std::make_pair(mul_mat_qX_0_q8_0_T<Q8_0_Unpacker, 5, block_q8_2>, 5);
         if (nq == 6) return std::make_pair(mul_mat_qX_0_q8_0_T<Q8_0_Unpacker, 6, block_q8_2>, 6);