dsp56800 Freescale Semiconductor, Inc, dsp56800 Datasheet - Page 352

• Manufacturer Part Number: dsp56800
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

MPY
Instruction Fields:
Parallel Moves:
A-122
Operation
MPY
Operation
1.
for every addressing mode.
2.
as the destination of the parallel read operation. Memory writes are allowed in this case.
MPY
Data ALU Operation
This instruction occupies only 1 program word and executes in 1 instruction cycle
The destination of the data ALU operation is not allowed to be the same register
1
(±)Y1,X0,FDD
(±)Y0,X0,FDD
(±)Y1,Y0,FDD
(±)Y0,Y0,FDD
(±)A1,Y0,FDD
(±)B1,Y1,FDD
Operands
(F = A or B)
Operands
Y1,X0,F
Y0,X0,F
Y1,Y0,F
Y0,Y0,F
A1,Y0,F
B1,Y1,F
DSP56800 Family Manual
Signed Multiply
C
2
W
X:(Rn)+N
1
X:(Rn)+
Source
X0
Y1
Y0
A1
B1
A
B
Fractional multiply where one operand is optionally
negated before multiplication
Note: Assembler also accepts first two operands when
they are specified in opposite order
Parallel Memory Move
Destination
X:(Rn)+N
X:(Rn)+
Comments
X0
Y1
Y0
A1
B1
A
B
Freescale Semiconductor
2
MPY