mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 107

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

CMPA
Operation:
Assembler Syntax: CMPA <ea>y, Ax
Attributes:
Description: Operates similarly to CMP, but is used when the destination register is an
address register rather than a data register. The operation size can be word or longword.
Word-length source operands are sign-extended to 32 bits for comparison.
Condition Codes:
Instruction Fields:
Ay (word/longword operand only)
—
X
Instruction
Format:
• Register field—Specifies the destination register.
• Opmode field:
• Effective address field specifies the source operand; use addressing modes in the
Addressing Mode
following table:
N
∗
(d
(Ay) +
– (Ay)
(Ay)
16
Dy
,Ay)
Z
∗
15
1
Operand sizes supported
V
∗
Opcode present
14
Destination – Source → cc
Size = word, long
0
CMPA
13
C
1
∗
Byte
—
Mode
000
001
010
011
100
101
12
1
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 occurs; cleared otherwise
C Set if a borrow occurs; cleared otherwise
Chapter 2. ColdFire Core
Word
11
011
reg. number:Dy
reg. number:Ay
reg. number:Ay
reg. number:Ay
reg. number:Ay
reg. number:Ay
REGISTER
Compare Address
Register
10
ColdFire Instruction Set Architecture Enhancements
Long
111
9
V2, V3 Core
8
Yes
OPMODE
.l
Addressing Mode
Ax - <ea>y
Operation
7
(d
(d
(d
#<data>
(xxx).W
(xxx).L
8
8
16
,PC,Xi)
,Ay,Xi)
6
,PC)
5
MODE
EFFECTIVE ADDRESS
V4 Core
4
.w, .l
Yes
Mode
110
111
111
111
111
111
3
CMPA
reg. number:Ay
2
REGISTER
Register
000
001
100
010
011
1
2-41
0