dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 391

• Manufacturer Part Number: dsp56800e
• Description: 16-bit Digital Signal Controller Core
• Manufacturer: Freescale Semiconductor, Inc

ASR
Parallel Dual Reads:
Instruction Opcodes:
Timing:
Memory:
Freescale Semiconductor
ASR
ASR
ASR
ASR
1.This instruction is not allowed when the XP bit in the OMR is set (that is, when the instructions are executing
from data memory).
2.This instruction occupies only 1 program word and executes in 1 cycle for every addressing mode.
Operation
ASR
Data ALU Operation
F GGG,X:<ea_m>
F X:<ea_m>,GGG
F
FFF
2
1 oscillator clock cycle
1 program word
X:<ea_m>,reg1
X:<ea_v>,reg2
Operands
F
1
Arithmetic Shift Right
15
15
15
15
0
0
0
0
Instruction Set Details
Source 1
X:(R0)+N
X:(R1)+N
X:(R4)+N
X:(R0)+N
X:(R4)+N
X:(R0)+
X:(R1)+
X:(R4)+
X:(R0)+
X:(R4)+
0
0
1
1
First Memory Read
0
1
1
1
12
12
12
12
1
1
1
1
11
11
11
11
1
1
0
0
Destination 1
G
G
1
0
Y0
Y1
Y0
Y1
G
G
F
v
G
G
F
v
8
8
8
8
F
F
F
F
7
7
7
7
X:(R3)+N3
X:(R3)+N3
Source 2
0
0
1
X:(R3)+
X:(R3)–
X:(R3)+
X:(R3)+
v
Second Memory Read
1
1
1
1
1
1
0
0
4
4
4
4
0
0
0
1
3
3
3
3
Destination 2
m
m
m
0
ASR
X0
X0
C
R
R
0
1
R
R
v
1
A-47
0
0
0
0