better density self-interaction.

Former-commit-id: c5fa53714af80cac2803940a719eb73fc5120e18

src/cell.c

@@ -167,7 +167,7 @@ void cell_unlocktree( struct cell *c ) {
  
 void cell_split ( struct cell *c  ) {
 
-    int i, j, k, kk;
+    int i, j, k;
     struct part temp, *parts = c->parts;
     int left[8], right[8];
     double pivot[3];

src/space.h

@@ -26,7 +26,7 @@
 #define space_splitratio                0.875f
 #define space_splitsize_default         400
 #define space_subsize_default           5000
-#define space_dosub                     1
+#define space_dosub                     0
 #define space_stretch                   1.05f
 #define space_maxtaskspercell           31
 #define space_maxreldx                  0.2f

src/vector.h

@@ -27,7 +27,7 @@
     #define VEC_MACRO(elcount, type)  __attribute__((vector_size((elcount)*sizeof(type)))) type
 
     /* So what will the vector size be? */
-    #ifdef NO__AVX__
+    #ifdef __AVX__
         #define VECTORIZE
         #define VEC_SIZE 8
         #define VEC_FLOAT __m256
@@ -54,7 +54,7 @@
         #define vec_dbl_ftoi(a) _mm256_cvttpd_epi32(a)
         #define vec_dbl_fmin(a,b) _mm256_min_pd(a,b)
         #define vec_dbl_fmax(a,b) _mm256_max_pd(a,b)
-    #elif defined( NO__SSE2__ )
+    #elif defined( __SSE2__ )
         #define VECTORIZE
         #define VEC_SIZE 4
         #define VEC_FLOAT __m128