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2 Instructions
2-170
CP1E CPU Unit Instructions Reference Manual(W483)
–C/–CL
Applicable Program Areas
Operands
Operand Specifications
Flags
Instruction Mnemonic Variations
Function
code
Function
SIGNED BINARY SUBTRACT
WITH CARRY
–C @–C 412
Subtracts 4-digit (single-word) hexadecimal data
and/or constants with the Carry Flag (CY).
DOUBLE SIGNED BINARY
SUBTRACT WITH CARRY
–CL @–CL 413
Subtracts 8-digit (double-word) hexadecimal data
and/or constants with the Carry Flag (CY).
Symbol
–C –CL
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description
Data type Size
–C –CL –C –CL
Mi
–C: Minuend word
–CL: First minuend word
INT DINT 1 2
Su
–C: Subtrahend word
–CL: First subtrahend word
INT DINT 1 2
R
–C: Result word
–CL: First result word
INT DINT 1 2
Area
Word addresses Indirect DM addresses
Constants CF Pulse bits TR bits
CIO WR HR AR T C DM @DM *DM
Mi, Su
OK OK OK OK OK OK OK OK OK
OK
--- --- ---
R ---
Name Label
Operation
–C –CL
Error Flag P_ER OFF OFF
Equals Flag P_EQ • ON when the subtraction 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 subtraction results in a borrow.
• OFF in all other cases.
• ON when the results in a borrow.
• OFF in all other cases.
Overflow Flag P_OF • ON when the result of subtracting a negative num-
ber and CY from a positive number is in the range
8000 to FFFF hex.
• OFF in all other cases.
• ON when the result of subtracting a negative num-
ber and CY from a positive number is in the range
80000000 to FFFFFFFF hex.
• OFF in all other cases.
Underflow Flag P_UF • ON when the result of subtracting a positive num-
ber and CY from a negative number is in the
range 0000 to 7FFF hex.
• OFF in all other cases.
• ON when the result of subtracting a positive num-
ber and CY from a negative number 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.
R
Mi
Su
Mi: Minuend word
Su: Subtrahend word
R: Result word
–C(412)
–CL(413)
R
Mi
Su
Mi: Minuend word
Su: Subtrahend word
R: Result word