src/org/nutz/repo/org/objectweb/asm/commons/GeneratorAdapter.java
private int getArgIndex(final int arg) {
        int index = (access & Opcodes.ACC_STATIC) == 0 ? 1 : 0;
        for (int i = 0; i < arg; i++) {
            index += argumentTypes[i].getSize();
        }
        return index;
    }
private int getArgIndex(final int arg) {
        int index = (access & Opcodes.ACC_STATIC) == 0 ? 1 : 0;
        for (int i = 0; i < arg; i++) {
            index += argumentTypes[i].getSize();
        }
        return index;
    }
Returns the index of the given method argument in the frame's local
variables array.

@param arg
the index of a method argument.
@return the index of the given method argument in the frame's local
variables array.