Motorola DSP96002 - Manual (Page 387)

MOTOROLA DSP96002 USER’S MANUAL A - 199
JOINB Join Two 8-bit Integers JOINB
Operation:
D.L {7:0}
→
D.L {7:0} (parallel data bus move)
S.L {7:0}
→
D.L {15:8}
0
→
D.L {31:16}
Assembler Syntax:
JOINB S,D
(move syntax - see the Move instruction description.)
Description:
Transfer the 8 LSBs of the lower portion of source operand S into bits 15-8 of the lower portion of destina-
tion D. The 8 LSBs of the lower portion of D remain unchanged. The 16 MSBs of the lower portion of D
are zeroed.
Input Operand(s) Precision: 8-bit integer.
Output Operand Precision: 32-bit integer.
CCR Condition Codes:
C - Not affected.
V - Always cleared.
Z - Set if result is zero. Cleared otherwise.
N - Always cleared.
I - Not affected.
LR - Not affected.
–
R - Not affected.
A - Not affected.
ER Status Bits: Not affected.
IER Flags: Not affected.
Instruction Format: JOINB S,D (move syntax - see the Move instruction description.)
Instruction Fields:
(u u)
D d d d
Dn.L n n n where nnn = 0-7
S s s s
Dn.L n n n where nnn = 0-7
Timing: 2 + mv oscillator clock cycles
Memory: 1 + mv program words
11 0sss 1010 1ddd
31 14 13 0
OPTIONAL EFFECTIVE ADDRESS EXTENSION OR IMMEDIATE LONG DATA
DATA BUS MOVE FIELD