dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 543

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

Condition Codes:
S — Computed according to the definition in A.5 CONDITION CODE COMPUTATION
L — Set if limiting (parallel move) or overflow has occurred in result
E — Set if the signed integer portion of A or B result is in use
U — Set if A or B result is unnormalized
N — Set if bit 55 of A or B result is set
Z — Set if A or B result equals zero
V — Set if overflow has occurred in A or B result
C — Set if a carry (or borrow) occurs from bit 55 of A or B result
Note: The definitions of the E and U bits vary according to the scaling mode being used.
Refer to Section A.5 CONDITION CODE COMPUTATION for complete details.
Instruction Format:
Opcode:
Instruction Fields:
Timing: 2+mv oscillator clock cycles
Memory: 1+mv program words
MOTOROLA
SUB
SUB
S,D
B,A
A,B
X,A
X,B
Y,A
Y,B
23
LF
J J J d
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1
5
S,D
DM
14
13
T
DATA BUS MOVE FIELD
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12
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INSTRUCTION DESCRIPTIONS
S,D
X0,A 1 0 0 0
X0,B 1 0 0 1
Y0,A 1 0 1 0
Y0,B 1 0 1 1
X1,A 1 1 0 0
X1,B 1 1 0 1
S1
11
INSTRUCTION SET DETAILS
OPTIONAL EFFECTIVE ADDRESS EXTENSION
S0
10
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J J J d
I1
9
Subtract
I0
8
S
7
S,D
Y1,A 1 1 1 0
Y1,B 1 1 1 1
8
L
6
7
0
E
5
J J J d
J
U
4
CCR
J
N
3
J
Z
4
2
3
d
V
1
1
C
0
SUB
0
0
0
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