ADSP-21020 데이터 시트보기 (PDF) - Analog Devices
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ADSP-21020 Datasheet PDF : 32 Pages
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ADSP-21020
Table V. Multiplier Compute Operations
Rn
MRF
MRB
Rn
Rn
MRF
MRB
Rn
Rn
MRF
MRB
MRF
MRB
MRxF
MRxB
= Rx * Ry ( S S F )
= Rx * Ry ( U U I
= Rx * Ry ( U U FR
= MRF + Rx * Ry ( S S F )
= MRB + Rx * Ry ( U U I
= MRF + Rx * Ry ( U U FR
= MRB
= SAT MRF
= SAT MRB
= SAT MRF
= SAT MRB
(SI)
(UI)
(SF)
(UF)
=0
= Rn
Fn = Fx * Fy
Rn = MRF – Rx * Ry ( S S F )
Rn = MRB= Rx * Ry ( U U I
MRF = MRF= Rx * Ry ( U U I FR
MRB = MRB
Rn = RND MRF
Rn = RND MRB
MRF = RND MRF
MRB = RND MRB
(SF)
(UF)
Rn = MRxF
Rn = MRxB
Rn, Rx, Ry
Fn, Fx, Fy
MRxF
MRxB
R15–R0; register file location, fixed-point
F15–F0; register file location, floating-point
MR2F, MR1F; MR0F; multiplier result accumulators, foreground
MR2B, MR1B, MR0B; multiplier result accumulators, background
( x-input y-input data format, )
( x-input y-input rounding
S
Signed input
U
Unsigned input
I
Integer input(s)
F
Fractional input(s)
FR Fractional inputs, Rounded output
(SF) Default format for 1-input operations
(SSF) Default format for 2-input operations
Table VI. Shifter and Shifter Immediate Compute Operations
Shifter
Shifter Immediate
Rn = LSHIFT Rx BY Ry
Rn = Rn OR LSHIFT Rx BY Ry
Rn = ASHIFT Rx BY Ry
Rn = Rn OR ASHIFT Rx BY Ry
Rn = ROT Rx BY RY
Rn = BCLR Rx BY Ry
Rn = BSET Rx BY Ry
Rn = BTGL Rx BY Ry
BTST Rx BY Ry
Rn = FDEP Rx BY Ry
Rn = Rn OR FDEP Rx BY Ry
Rn = FDEP Rx BY Ry (SE)
Rn = Rn OR FDEP Rx BY Ry (SE)
Rn = FEXT Rx BY Ry
Rn = FEXT Rx BY Ry (SE)
Rn = EXP Rx
Rn = EXP Rx (EX)
Rn = LEFTZ Rx
Rn = LEFTO Rx
Rn = LSHIFT Rx BY<data8>
Rn = Rn OR LSHIFT Rx BY<data8>
Rn = ASHIFT Rx BY<data8>
Rn = Rn OR ASHIFT Rx BY<data8>
Rn = ROT Rx BY<data8>
Rn = BCLR Rx BY<data8>
Rn = BSET Rx BY<data8>
Rn = BTGL Rx BY<data8>
BTST Rx BY<data8>
Rn = FDEP Rx BY <bit6>: <len6>
Rn = Rn OR FDEP Rx BY <bit6>:<1en6>
Rn = FDEP Rx BY <bit6>:<1en6> (SE)
Rn = Rn OR FDEP Rx BY <bit6>:<1en6> (SE)
Rn = FEXT Rx BY <bit6>:<1en6>
Rn = FEXT Rx BY <bit6>:<1en6> (SE)
Rn, Rx, Ry R15-R0; register file location, fixed-point
<bit6>:<len6> 6-bit immediate bit position and length values (for shifter immediate operations)
–10–
REV. C
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