%verify "executed"
    /* unop vA, vB */
    movzbl    rINSTbl,%ecx        # ecx<- BA
    sarl      $$4,%ecx            # ecx<- B
    andb      $$0xf,rINSTbl       # rINST<- A
    GET_VREG_WORD %eax %ecx 0     # eax<- v[B+0]
    GET_VREG_WORD %ecx %ecx 1     # ecx<- v[B+1]
    negl      %eax
    adcl      $$0,%ecx
    negl      %ecx
    SET_VREG_WORD %eax rINST 0    # v[A+0]<- eax
    FETCH_INST_OPCODE 1 %eax
    SET_VREG_WORD %ecx rINST 1    # v[A+1]<- ecx
    ADVANCE_PC 1
    GOTO_NEXT_R %eax