A-18 Triple-Bit Register Encodings; A-19 (A)Four-Bit Register Encodings For 12 Registers In Data Alu; A-19 (B)Four-Bit Register Encodings For 16 Condition Codes - Motorola DSP56000 Manual

Code
000
001
010
011
100
101
110
111
* Reserved
Where: DDD: 8 accumulators in data ALU
Table A-19(a) Four-Bit Register Encodings for 12 Registers in Data ALU
Table A-19(b) Four-Bit Register Encodings for 16 Condition Codes
MOTOROLA
INSTRUCTION ENCODING
Table A-18 Triple-Bit Register Encodings
DDD LLL
A0 A10
B0 B10
A2 X
B2 Y
A1 A
B1 B
A AB
B BA
LLL: 8 extended-precision registers in data ALU; LLL field is encoded as L0LL
FFF: 8 address modifier registers in address ALU
NNN: 8 address offset registers in address ALU
TTT: 8 address registers in address
FFF: 8 program controller registers
D D D D
0 0 X X
0 1 D D
1 D D D
Mnemonic C C C C
CC(HS) 0 0 0 0
GE 0 0 0 1
NE 0 0 1 0
PL 0 0 1 1
NN 0 1 0 0
EC 0 1 0 1
LC 0 1 1 0
GT 0 1 1 1
INSTRUCTION SET DETAILS
FFF NNN TTT
M0 N0 R0
M1 N1 R1
M2 N2 R2
M3 N3 R3
M4 N4 R4
M5 N5 R5
M6 N6 R6
M7 N7 R7
Description
Reserved
Data ALU Register
Data ALU Register
Mnemonic C C C C
CS(LO) 1 0 0
LT 1 0 0
EQ 1 0 1
MI 1 0 1
NR 1 1 0
ES 1 1 0
LS 1 1 1
LE 1 1 1
GGG
*
SR
OMR
SP
SSH
SSL
LA
LC
0
1
0
1
0
1
0
1
A - 313