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MPC823e Instruction Set—extsb
extsb
Assembler Syntax
BIT
0
1
2
FIELD
31
BIT
16
17
18
FIELD
00000
Definition
Operation
Description
B-60
extsb
rA,rS (Rc = 0)
extsb.
rA,rS (Rc = 1)
3
4
5
6
7
19
20
21
22
23
Extend Sign Byte
S ← rS[24]
rA[24-31] ← rS[24-31]
rA[0–23] ← (24)S
The contents of rS[24-31] are placed into rA[24-31]. Bit 24 of rS
is placed into rA[0-23].
Other registers altered:
Condition Register (CR0 field):
Affected: LT, GT, EQ, SO (if Rc = 1)
POWERPC ARCHITECTURE
LEVEL
UISA
MPC823e REFERENCE MANUAL
8
9
10
11
12
S
24
25
26
27
28
954
SUPERVISOR
OPTIONAL
LEVEL
13
14
15
A
29
30
31
RC
FORM
X
MOTOROLA
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