ARM: don't use USE_GENERIC_TREE
It's 1-2% faster to use hard-coded tree on ARM
#include "./vp8i.h"
#include "../utils/bit_reader_inl.h"
+#if !defined(__arm__) && !defined(_M_ARM) && !defined(__aarch64__)
+// using a table is ~1-2% slower on ARM. Prefer the coded-tree approach then.
#define USE_GENERIC_TREE
+#endif
#ifdef USE_GENERIC_TREE
static const int8_t kYModesIntra4[18] = {
