Hello, I was able to locate the Problem(s). And I think this maybe could be a gcc-bug. It seem's that sin() and sqrt() works in less precision when compiled for AARCH64 (no ffast-math or other "unsafe" float-options enabled). I've worked that around by using sinl() and sqrtl() and now everythink work's like expected. I'm note sure if this is a bug or a normal behavior when compiling for different architectures. If this could be a bug and you need additional information feel free to write. -- View this message in context: http://gcc.1065356.n5.nabble.com/float-behaivior-on-ARMv8-A-tp1259502p1267857.html Sent from the gcc - Help mailing list archive at Nabble.com.