Omron CP1E-N@@D@-@ Computer Hardware User Manual


 
2-159
2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Symbol Math Instructions
2
+/+L
Flags
Function
+
+(400) adds the binary values in Au and Ad and outputs the result to R.
+L
+L(401) adds the binary values in Au and Au+1 and Ad and Ad+1 and outputs the result to R.
Sample program
Name Label
Operation
+ +L
Error Flag P_ER OFF OFF
Equals Flag P_EQ ON when the result is 0.
OFF in all other cases.
ON when the result is 0.
OFF in all other cases.
Carry Flag P_CY ON when the addition results in a carry.
OFF in all other cases.
ON when the addition results in a carry.
OFF in all other cases.
Overflow Flag P_OF ON when the result of adding two positive num-
bers is in the range 8000 to FFFF hex.
OFF in all other cases.
ON when the result of adding two positive num-
bers is in the range 80000000 to FFFFFFFF hex.
OFF in all other cases.
Underflow Flag P_UF ON when the result of adding two negative num-
bers is in the range 0000 to 7FFF hex.
OFF in all other cases.
ON when the result of adding two negative num-
bers is in the range 00000000 to 7FFFFFFF hex.
OFF in all other cases.
Negative Flag P_N ON when the leftmost bit of the result is 1.
OFF in all other cases.
ON when the leftmost bit of the result is 1.
OFF in all other cases.
+
CY
R
Au
Ad
(Signed binary)
(Signed binary)
(Signed binary)
CY will turn ON
when there is a
carry.
+
CY R+1 R
Au+1
Ad+1
Au
Ad
(Signed binary)
(Signed binary)
(Signed binary)
CY will turn ON
when there is a
carr
y
.
+
0.00
+L
D100
D110
D120
0.00
When CIO 0.00 is ON in this example, D100 and D110 will be
added as 4-digit signed binary values and the result will be output
to D120.
When CIO 0.00 is ON, D101 and D100 and D111 and D110 will
be added as 8-digit signed binary values and the result will be
output to D121 and D120.
D100
D110
D120