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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Comparison Instructions
2
CMP/CMPL
CMP/CMPL
Applicable Program Areas
Operands
Operand Specifications
Flags
Instruction Mnemonic Variations
Function
code
Function
COMPARE CMP !CMP 020
Compares two unsigned binary values (constants
and/or the contents of specified words) and out-
puts the result to the Arithmetic Flags in the Auxil-
iary Area.
DOUBLE COMPARE CMPL --- 060
Compares two double unsigned binary values
(constants and/or the contents of specified words)
and outputs the result to the Arithmetic Flags in
the Auxiliary Area.
Symbol
CMP CMPL
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description
Data type Size
CMP CMPL CMP CMPL
S1
CMP: Comparison data 1
CMPL: Comparison data 1, rightmost word address
UINT UDINT 1 2
S2
CMP: Comparison data 2
CMPL: Comparison data 2, rightmost word address
UINT UDINT 1 2
Area
Word addresses Indirect DM addresses
Constants CF Pulse bits TR bits
CIO WR HR AR T C DM @DM *DM
S1, S2 OK OK OK OK OK OK OK OK OK OK --- --- ---
Name
CX-Programmer
label
Operation
CMP CMPL
Error Flag P_ER Unchanged Unchanged
Greater Than Flag P_GT • ON if S
1
> S
2
.
• OFF in all other cases.
• ON if S
1
+1, S
1
> S
2
+1, S
2
.
• OFF in all other cases.
Greater Than or Equal Flag P_GE • ON if S
1
≥ S
2
.
• OFF in all other cases.
• ON if S
1
+1, S
1
≥ S
2
+1, S
2
.
• OFF in all other cases.
Equal Flag P_EQ • ON if S
1
= S
2
.
• OFF in all other cases.
• ON if S
1
+1, S
1
= S
2
+1, S
2
.
• OFF in all other cases.
Not Equal Flag P_NE • ON if S
1
≠ S
2
.
• OFF in all other cases.
• ON if S
1
+1, S
1
≠ S
2
+1, S
2
.
• OFF in all other cases.
Less Than Flag P_LT • ON if S
1
< S
2
.
• OFF in all other cases.
• ON if S
1
+1, S
1
< S
2
+1, S
2
.
• OFF in all other cases.
Less Than or Equal Flag P_LE • ON if S
1
≤ S
2
.
• OFF in all other cases.
• ON if S
1
+1, S
1
≤ S
2
+1, S
2
.
• OFF in all other cases.
Negative Flag P_N Unchanged Unchanged
CMP(020)
S
1
S2
S1: Comparison data 1
S
2: Comparison data 2
CMPL(060)
S
1
S2
S1: Comparison data 1
S
2: Comparison data 2