Stereo System User Manual

MOTOROLA DSP96002 USER’S MANUAL A - 303
SPLITB Extract an 8-bit Integer SPLITB
Instruction Fields:
Dddd
Dn.L n n n where nnn = 0-7
Ssss
Dn.L n n n where nnn = 0-7
Timing: 2 + mv oscillator clock cycles
Memory: 1 + mv program words
Operation:
S.L {15:8} → D.L {7:0} (parallel data bus move)
S.L {15} → D.L {31:8}
Assembler Syntax:
SPLITB S,D
(move syntax - see the Move instruction de-
scription.)
Description:
Transfer bits 15-8 of the lower portion of source operand S into the 8 LSBs of the lower portion of destina-
tion D and sign-extend to 32 bits.
Input Operand(s) Precision: 32-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 - Set if result is negative. Cleared otherwise.
I - Not affected.
LR - Not affected.
–
R - Not affected.
A - Not affected.
ER Status Bits: Not affected.
IER Flags: Not affected.
Instruction Format: SPLITB S,D (move syntax - see the Move instruction description.)
11 0sss 1011 1ddd
31 14 13 0
OPTIONAL EFFECTIVE ADDRESS EXTENSION OR IMMEDIATE LONG DATA
DATA BUS MOVE FIELD