5.93. Double Precision Compare

Addr
Mode  Mnemonic          Format/Opcode
                           8      4      4
                        ----------------------
R     DCR   RA,RB       |  F7  |  RA  |  RB  |
                        ----------------------
                           8      4      4           16
D     DC    RA,ADDR     --------------------------------------
DX    DC    RA,ADDR,RX  |  F6  |  RA  |  RX  |  |    ADDR    |
                        --------------------------------------

Description. The double precision Derived Operand, DO, is compared to the contents of registers RA and RA+1 where RA contains the MSH of a double precision word. Then, the Condition Status, CS, is set based on whether the contents of RA, RA+1 is less than, equal to, or greater than the DO. The contents of RA and RA+1 are unchanged.

Register Transfer Description.

(RA,RA+1) : DO;
(CS) <-- 0010  if (RA,RA+1) = DO;
(CS) <-- 0001  if (RA,RA+1) < DO;
(CS) <-- 0100  if (RA,RA+1) >= DO;

Registers Affected. CS