Motorola DSP96002 - Manual (Page 81)

MOTOROLA DSP96002 USER’S MANUAL 6 - 5
6.2.5 Loop Instructions
The loop instructions control hardware looping by initiating a program loop and setting up looping parame-
ters, or by "cleaning" up the system stack when terminating a loop. Initialization includes saving registers
used by a program loop (LA and LC) on the system stack so that program loops can be nested. The ad-
dress of the first instruction in a program loop is also saved to allow no-overhead looping. See Figure 6-
5 for a list of the four loop instructions.
Figure 6-5. Loop Instructions
6.2.6 Move Instructions
The move instructions perform data movement over the X and Y Data Buses, over the Global Data Bus
and over the Program Data Bus. Address Generation Unit instructions are also included among the follow-
ing move instructions. See Figure 6-6 for a list of the nine move instructions.
Figure 6-6. Move Instructions
6.2.7 Program Control Instructions
The program control instructions include jumps, conditional jumps, branches, conditional branches and oth-
er instructions which affect the PC and system stack. Branch instructions allow PC relative displacements
needed for position independent code. See Figure 6-7 for a list of the thirty five program control instruc-
tions.
DO Start Hardware Loop
DOR Start PC Relative Hardware Loop
ENDDO Exit from Hardware Loop
REP Repeat Next Instruction
LEA Load Effective Address
LRA Load PC Relative Address
MOVE Move Data Register(s)
MOVETA Move Data Register(s) and Test Address
MOVEC Move Control Register
MOVEI Move Immediate
MOVEM Move Program Memory
MOVEP Move Peripheral Data
MOVES Move Absolute Short