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Assembler

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NAME CMP -- Compare
SYNOPSIS
CMP<ea>,Dn
Size = (Byte, Word, Long)
FUNCTION Subtracts the source operand from the destination data register and sets the condition codes according to the result. The data register is NOT changed.
FORMAT
1514131211109876543210
1011REGISTEROP-MODEMODEREGISTER
nbsp;<ea>
OP-MODE
0008 bits operation.
00116 bits operation.
01032 bits operation.
REGISTER The data register specifies destination Dn. <ea> specifies source operand, addressing modes allowed are:
Addressing ModeModeRegister
Dn000No reg. Dn
An *001No reg. An
(An)010No reg. An
(An)+011No reg. An
-(An)100No reg. An
(d16,An)101No reg. An
(d8,An,Xi)110No reg. An
(bd,An,Xi)110No reg. An
([bd,An,Xi]od)110No reg. An
([bd,An],Xi,od)110No reg. An
Addressing ModeModeRegister
Abs.W111000
Abs.L111001
(d16,PC)111010
(d8,PC,Xi)111011
(bd,PC,Xi)111011
([bd,PC,Xi],od)111011
([bd,PC],Xi,od)111011
#data111100
* Word and Long only.
RESULT
X-Not affected
N-Set if the result is negative. Cleared otherwise.
Z-Set if the result is zero. Cleared otherwise.
V-Set if an overflow occours. Cleared otherwise.
C-Set if a borrow occours. Cleared otherwise.


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Änderungen und Irrtümer vorbehalten. Letzte Änderung:
14 September 2001.
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