N3DS: NEON is likely not supported.

src/cpuinfo/SDL_cpuinfo.c

@@ -469,7 +469,7 @@ CPU_haveNEON(void)
 #elif __VITA__
     return 1;
 #elif __3DS__
-    return 1;
+    return 0;
 #elif defined(__APPLE__) && defined(__ARM_ARCH) && (__ARM_ARCH >= 7)
     /* (note that sysctlbyname("hw.optional.neon") doesn't work!) */
     return 1;  /* all Apple ARMv7 chips and later have NEON. */