Form PC-relative address to 4KB page.
Is the 64-bit name of the general-purpose destination register.
Is the program label whose 4KB page address is to be calculated. Its offset from the page address of this instruction, in the range ±4GB.
Form PC-relative address to 4KB page adds an immediate value that is shifted left by 12 bits, to the PC value to form a PC-relative address, with the bottom 12 bits masked out, and writes the result to the destination register.