dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 577

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

A.9.8 REP Restrictions
The REP instruction can repeat any single-word instruction except the REP instruction
itself and any instruction that changes program flow. The following instructions are not
allowed to follow an REP instruction:
Immediately after REP
Also, an REP instruction cannot be the last instruction in a DO loop (at LA).
A.10 INSTRUCTION ENCODING
This section summarizes instruction encoding for the DSP56K instruction set. The
instruction codes are listed in nominally descending order. The symbols used in decod-
ing the various fields of an instruction are identical to those used in the Opcode section
of the individual instruction descriptions. The user should always refer to the actual
instruction description for complete information on the encoding of the various fields of
that instruction.
Section A.10.1 gives the encodings for (1) various groupings of registers used in the
instruction encodings, (2) condition code combinations, (3) addressing, and (4) address-
ing modes.
Section A.10.2 gives the encoding for the parallel move portion of an instruction. These
16-bit partial instruction codes may be combined with the 8-bit data ALU opcodes listed
in Section A.10.3 to form a complete 24-bit instruction word.
Section A.10.3 gives the complete 24-bit instruction encoding for those instructions
which do not allow parallel moves.
MOTOROLA
Freescale Semiconductor, Inc.
For More Information On This Product,
INSTRUCTION SET DETAILS
INSTRUCTION ENCODING
Go to: www.freescale.com
DO
Jcc
JCLR
JMP
JSET
JScc
JSCLR
JSR
JSSET
REP
RTI
RTS
STOP
SWI
WAIT
ENDDO
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