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EXTB
Operation:
D.L {7:0}
D.L {7:0}
D.L {7}
D.L {31:8}
Description:
Sign extend the lower byte of D.L into the upper 24 bits of D.L.
Input Operand(s) Precision: 8-bit integer.
Output Operand Precision: 32-bit integer.
CCR Condition Codes:
C
V
Z
N
I
LR
–
R
A
ER Status Bits: Not affected.
IER Flags: Not affected.
Instruction Format: EXTB D
31
DATA BUS MOVE FIELD
OPTIONAL EFFECTIVE ADDRESS EXTENSION OR IMMEDIATE LONG DATA
Instruction Fields:
D
Dn.L
Timing: 2 + mv oscillator clock cycles
Memory: 1 + mv program words
MOTOROLA
Sign Extend Byte
(parallel data bus move)
- Not affected.
- Always cleared.
- Set if result is zero. Cleared otherwise.
- Set if result is negative. Cleared otherwise.
- Not affected.
- Not affected.
- Not affected.
- Not affected.
(move syntax - see the MOVE instruction description.)
(u u)
d d d
n n n
where nnn = 0-7
DSP96002 USER'S MANUAL
Assembler Syntax:
EXTB D
(move syntax - see the MOVE in-
struction description.)
14 13
10
0001
EXTB
0
uu01
1ddd
A - 85
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