Improvement of Cortex-A15

I want to do some optimizations for Cortex-A15,Is anyone doing this too or is there any work has been done? Yang Yueming

Is it a bug when use “<<”if the operator is out of the size "0~63"

Case: #include #include long long abc = 0x01234567891abcde; long long xyz; int main () { xyz = abc << 65; printf("%llx\n", xyz); return 0; } The result of xyz should be "0"，but it is "2468acf123579bc" ,same as xyz = abc << 1,Why? So as for "i