You can refer to the least significant 32 bits of each 64-bit register by changing the leading x to a w, so we have w0 through w30. If an instruction targets a w register, the result is zero-extended to fill the x register.
You can refer to the least significant 32 bits of each 64-bit register by changing the leading x to a w, so we have w0 through w30. If an instruction targets a w register, the result is zero-extended to fill the x register.