WIP: remove scalar code from AVX2 code

dnn/vec_avx.h

@@ -257,27 +257,12 @@ static inline void sparse_sgemv_accum8x4(float *_out, const qweight *w, int rows
          __m256i vxj;
          __m256i vw;
          int pos;
-         int xj0, xj1, xj2, xj3;
          pos = 4 * (*idx++);
          vxj = _mm256_set1_epi32(*(int*)&x[pos]);
-         xj0 = x[pos+0];
-         xj1 = x[pos+1];
-         xj2 = x[pos+2];
-         xj3 = x[pos+3];
-         
          vw = _mm256_loadu_si256((const __m256i *)w); //_mm256_lddqu_si256?
          tmp = _mm256_maddubs_epi16(vxj, vw); //swap?
          tmp = _mm256_madd_epi16(tmp, ones);
          vy0 = _mm256_add_epi32(vy0, tmp);
-
-         y[0] += (w[0]*xj0+w[1]*xj1+w[2]*xj2+w[3]*xj3);
-         y[1] += (w[4]*xj0+w[5]*xj1+w[6]*xj2+w[7]*xj3);
-         y[2] += (w[8]*xj0+w[9]*xj1+w[10]*xj2+w[11]*xj3);
-         y[3] += (w[12]*xj0+w[13]*xj1+w[14]*xj2+w[15]*xj3);
-         y[4] += (w[16]*xj0+w[17]*xj1+w[18]*xj2+w[19]*xj3);
-         y[5] += (w[20]*xj0+w[21]*xj1+w[22]*xj2+w[23]*xj3);
-         y[6] += (w[24]*xj0+w[25]*xj1+w[26]*xj2+w[27]*xj3);
-         y[7] += (w[28]*xj0+w[29]*xj1+w[30]*xj2+w[31]*xj3);
          w += 32;
       }
       _mm256_storeu_si256 ((__m256i *)&y[0], vy0);