Binary Calculation Instructions; Binary Add: Adb(080) - Omron CVM1D Operation Manual

Binary Calculation Instructions

5-19

Binary Calculation Instructions

5-19-1 BINARY ADD: ADB(080)

Ladder Symbol
(080)
ADB Au
Variations
j ADB(080)
Description
Precautions
Flags
Examples
0000
TR0
00
A500
04
A500
04
The Binary Calculation Instructions all perform arithmetic operations on binary
(hexadecimal) data. The CVM1D CPUs also support binary symbol math in-
structions. Refer to 5-20 Symbol Math Instructions for details.
The addition and subtraction instructions include CY in the calculation as well as
in the result. Be sure to clear CY if its previous status is not required in the cal-
culation, and to use the result placed in CY, if required, before it is changed by
the execution of any other instruction. STC(078) and CLC(079) can be used to
control CY. Refer to 5-18 BCD Calculation Instructions for details on STC(078)
and CLC(079).
Ad R
When the execution condition is OFF, ADB(080) is not executed. When the
execution condition is ON, ADB(080) adds the content of Au, Ad, and CY, and
places the result in R. CY will be set if the result is greater than FFFF.
Au + Ad + CY
Note An equivalent symbol math instruction (+C(402)) is also available, although
+C(402) has the additional feature of controlling the Overflow (A50009) and Un-
derflow (A50010) Flags.
Refer to page 101 for general precautions on operand data areas.
Content of *DM word is not BCD when set for BCD.
ER (A50003):
CY (A50004): The result is greater than FFFF.
EQ (A50006): The result is 0.
N (A50008): Shows the status of bit 15 of R after execution.
The following example shows a four-digit addition with CY used to place either
0000 or 0001 into R+1 to ensure that any carry is preserved.
(080)
ADB 0010 D00100
(030)
MOV #0000
(030)
MOV #0001
Operand Data Areas
Au: Augend word CIO, G, A, T, C, #, DM, DR, IR
Ad: Addend word CIO, G, A, T, C, #, DM, DR, IR
R: Result word CIO, G, A, DM, DR, IR
CY
(079)
CLC
= R
1210
1211 = R+1
1211
= R+1
Section 5-19
R
Address Instruction Operands
00000 LD 000000
00001 OUT
00002 CLC(079)
00003 ADB(080)
D00100
00004 AND NOT A50004
00005 MOV(030)
#0000
00006 LD
00007 AND A50004
00008 MOV(030)
#0001
TR0
0010
1210
1211
TR0
1211
249