% Unary Operator

You may wish to swap the bytes of a numeric value, rather than rely on the debugger’s knowledge of representation. The "%" unary operator reverses all the bytes of its integer operand.

For example:

(idb) printx %(short)258

0x201

(idb) printx %(int)258

0x2010000

(idb) printx %(long long)258

0x201000000000000