TSC80251 TEMIC [TEMIC Semiconductors], TSC80251 Datasheet - Page 104

• Manufacturer Part Number: TSC80251
• Manufacturer: TEMIC [TEMIC Semiconductors]

Rev. C – May 7, 1999
CMP <dest>,<src>
Function:
Compare
Description:
Subtracts the source operand from the destination operand. The result is not stored in the destination operand. If a
borrow is needed for bit 7, the CY (borrow) flag is set; otherwise it is clear.
When subtracting signed integers, the OV flag indicates a negative result when a negative value is subtracted from a
positive value, or a positive result when a positive value is subtracted from a negative value.
Bit 7 in this description refers to the most significant byte of the operand (8, 16 or 32 bit)
The source operand allows four addressing modes: register, direct, immediate and indirect.
Example :
Register 1 contains 0C9h (11001001B) and register 0 contains 54h (01010100B). The instruction CMP R1,R0 clears
the CY and AC flags and sets the OV flag.
CMP Rmd,Rms
[Encoding]
CMP WRjd,WRjs
[Encoding]
FLAGS :
Hex Code in:
Binary Mode = [A5][Encoding]
Source Mode = [Encoding]
Hex Code in:
Binary Mode = [A5][Encoding]
Source Mode = [Encoding]
B
B
CY
C
E
AC
ssss
tttt
OV
TTTT
SSSS
Operation:
CMP
(Rmd) - (Rms)
Operation:
CMP
(WRjd) - (WRjs)
N
TSC80251
Z
5.59