bitwise_shift_left(num, amount) and bitwise_shift_right(num, amount) returns num << (amount & 63) or num >> (amount & 63) when amount is negative or greater than 63.

bitwise_shift_left(1, 64) => 1, should be 0
bitwise_shift_right(1, 64) => 1, should be 0
bitwise_shift_left(1, -1) => -9223372036854775808, should be 0
bitwise_shift_right(1, -1) => 0, shuould be 2

maybe bitwise_shift_right should be implement with >>> instead of >>.
bitwise_roll_left and bitwise_roll_right can be implement with Long.rotateLeft and Long.rotateRight.

They're implemented by the Java >> operators, so in fact they only care about the LSBs of the shift amount. I think it makes sense for the right one to use logic shift, though I think an arithmetic shift would then be needed.

I agree about the roll implementation using the rotate methods. Thanks for checking!

Splitting the mask to the amount to #1675.