-const int_fast8_t ff_left_modifier_l[8] = { 0,-1, 6,-1,-1, 7, 6, 7};
-const int_fast8_t ff_top_modifier_l[8] = {-1, 1, 5,-1,-1, 5, 7, 7};
-const int_fast8_t ff_left_modifier_c[7] = { 5,-1, 2,-1, 6, 5, 6};
-const int_fast8_t ff_top_modifier_c[7] = { 4, 1,-1,-1, 4, 6, 6};
+const int8_t ff_left_modifier_l[8] = { 0, -1, 6, -1, -1, 7, 6, 7 };
+const int8_t ff_top_modifier_l[8] = { -1, 1, 5, -1, -1, 5, 7, 7 };
+const int8_t ff_left_modifier_c[7] = { 5, -1, 2, -1, 6, 5, 6 };
+const int8_t ff_top_modifier_c[7] = { 4, 1, -1, -1, 4, 6, 6 };