runtime/interpreter/mterp/x86_64/op_const_wide_high16.S - platform/art - Git at Google

 %def op_const_wide_high16():
     /* const-wide/high16 vAA, #+BBBB000000000000 */
     movzwq  2(rPC), %rax                    # eax <- 0000BBBB
     salq    $$48, %rax                      # eax <- BBBB0000
     SET_WIDE_VREG %rax, rINSTq              # v[AA+0] <- eax
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
	%def op_const_wide_high16():
	/* const-wide/high16 vAA, #+BBBB000000000000 */
	movzwq 2(rPC), %rax # eax <- 0000BBBB
	salq $$48, %rax # eax <- BBBB0000
	SET_WIDE_VREG %rax, rINSTq # v[AA+0] <- eax
	ADVANCE_PC_FETCH_AND_GOTO_NEXT 2