IP2022 User’s Manual—Instruction Set Architecture www.ubicom.com 225 TEST fr Test fr for Zero Operation: if fr = 0, Z = 1
else Z = 0 Bits affected: Z Opcode: 0010 001f ffff ffff Description: This   instruction   moves   the   contents   of   the
specified  data  memory  location  into  the  same
register.  There  is  no  net  effect  except  to  set  or
clear the Z bit. If the register holds zero, the bit is
set.  Otherwise,  the  bit  is  cleared.  If  the  test
instruction is performed on the T0TMR register,
the Timer 0 prescaler is initialized to zero. If the
prescaler  is  about  to  expire  causing  Timer  0  to
increment and the test instruction is executed,
Timer 0 will not increment. Cycles: 1