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314
Comparison Instructions
Section 3-7
Description
CPSL(115) compares the double signed binary data in S
1
+1, S
1
and S
2
+1,
S
2
and outputs the result to Arithmetic Flags (the Greater Than, Greater Than
or Equal, Equal, Less Than or Equal, Less Than, and Not Equal Flags) in the
Auxiliary Area.
Note
CPSL(115) treats the data in S
1
and S
2
as double signed binary data which
ranges from 8000 0000 to 7FFF FFFF (
–
2,147,483,648 to 2,147,483,647 dec-
imal).
Arithmetic Flag Status
The following table shows the status of the Arithmetic Flags after execution of
CPSL(115). (A status of “---” indicates that the Flag may be ON or OFF.)
Using CPSL(115) Results in the Program
When CPSL(115) is executed, the result is reflected in the Arithmetic Flags.
Control the desired output or right-hand instruction with a branch from the
same input condition that controls CPSL(115), as shown in the following dia-
gram. Here, the Equals Flag and output A will be turned ON when S
1
+1, S
1
=
S
2
+1, S
2
.
Using CPSL(115) Results in the Program
Do not program another instruction between CPSL(115) and the instruction
controlled by the Arithmetic Flag because the other instruction might change
the status of the Arithmetic Flag. In this case, the results of instruction B might
change the results of CPSL(115).
(>, >=, =, <=, <, <>)
S2+1
Signed binary
comparison
Arithmetic Flags
CPSL(115)Result
Flag status
>
> =
=
< =
<
< >
S
1
+1, S
1
> S
2
+1, S
2
ON
ON
OFF
OFF
OFF
ON
S
1
+1, S
1
= S
2
+1, S
2
OFF
ON
ON
ON
OFF
OFF
S
1
+1, S
1
< S
2
+1, S
2
OFF
OFF
OFF
ON
ON
ON
CPSL
S1
S2
A
Correct Use of CPSL(115)
Arithmetic Flag
(Example: Equal Flag)
Содержание SYSMAC CS1D-CPU**
Страница 3: ...iv...
Страница 29: ...xxx...
Страница 185: ...146 List of Instructions by Function Code Section 2 4...
Страница 193: ...154 3 35 4 MOVE BIT MOVBC 568 1274 3 35 5 BIT COUNTER BCNTC 621 1276 3 35 6 GET VARIABLE ID GETID 286 1278...
Страница 1389: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2...
Страница 1390: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits...
Страница 1391: ...1352 ASCII Code Table Appendix A...