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Move, Caution – Motorola DSP96002 User Manual

Page 421

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MOTOROLA

DSP96002 USER’S MANUAL

A - 233

Y:

Y Memory Move

Y:

Operation:

Opcode Operation Y:

D

Opcode Operation Y:

D

Opcode Operation S

Y:

Opcode Operation S

Y:

Opcode Operation #xxxx

D

Assembler Syntax:

Opcode-Operands Y: ea, D

Opcode-Operands Y:(Rn+displacement),D

Opcode-Operands S,Y: ea

Opcode-Operands S,Y:(Rn+displacement)

Opcode-Operands #Data,D

Description:

Move one word operand to/from Y memory. One effective address is specified. All memory addressing

modes, including absolute address and immediate data, may be used. Long displacement addressing

may also be used. A memory to register or register to memory direction may be specified.

If the opcode-operand portion of the instruction specifies as the destination a portion of the register Dn, the

same register portion may not be specified as a destination D in the data bus move operation. That is, du-

plicate destinations are not allowed in the same instruction. For example, both a Data ALU operation and

a data move operation cannot write into the same register in the same instruction.

If the opcode-operand portion of the instruction specifies as the source or destination a portion of the reg-
ister Dn, the same register portion may be specified as a source S in the data bus move operation. That is,
duplicate sources are allowed in the same instruction. For example, a data move operation can read the
same register which is being used as a source or destination by a Data ALU operation in the same instruc-
tion.

CAUTION

See restrictions in Section A.10.6 concerning Rn, Mn, and Nn registers as a
destination.

Instruction Fields:

Rn - R0-R7 (Memory addressing modes only)

Move

Move