Program Control Instructions; Instruction Formats - Motorola DSP56156 Manual

MOVE(P) Move Peripheral Data
MOVE(S) Move Absolute Short
1.7.1.6

Program Control Instructions

The program control instructions include branches, jumps, conditional branches, and
jumps and other instructions which affect the PC and system stack. Program control in-
structions may affect the condition code register bits as specified in the instruction. Paral-
lel data moves are not allowed with any of these instructions. The following are the pro-
gram control instructions.
Bcc Branch Conditionally (PC relative)
BSR Branch to Subroutine (PC relative)
BRA Branch (PC relative)
BScc Branch to Subroutine Conditionally (PC relative)
DEBUG Enter Debug Mode
DEBUGcc Enter Debug Mode Conditionally
Jcc Jump Conditionally
JMP Jump
JSR Jump to Subroutine
JScc Jump to Subroutine Conditionally
NOP No Operation
REP Repeat Next Instruction
REPcc Repeat Next Instruction Conditionally
RESET Reset Peripheral Devices
RTI Return from Interrupt
RTS Return from Subroutine
STOP Stop Processing (low power stand-by)
SWI Software Interrupt
WAIT Wait for Interrupt (low power stand-by)
1.7.2

Instruction Formats

Instructions are one or two words in length. The instruction and its length are specified by
the first word of the instruction. The next word may contain information about the instruc-
tion itself or about an operand for the instruction. The assembly language source code for
a typical one word instruction is shown below. The source code is organized into four col-
umns.
Opcode Operands X Bus Data G Bus Data
MAC
MOTOROLA
INSTRUCTION SET SUMMARY
X0,Y0,A X:(R0)+,X0 X:(R3)+,Y0
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