Ice40.Mac

MAC primitive wrapper. See Ice40.Mac.Prim for the original primitive. For more information see LATTICE ICE Technology Library and DSP Function Usage Guide.

Documentation

mac :: HiddenClock dom => Parameter -> Input dom -> (Signal dom (BitVector 32), Signal dom Bit, Signal dom Bit, Signal dom Bit)

MAC primitive wrapper

data Input dom

MAC inputs

Constructors

Input

Fields

• ce :: Signal dom Bit

  clock enable input. applies to all clocked elemets, default = 1

• c :: Signal dom (BitVector 16)

  16-bits data of input c, default = 0

• a :: Signal dom (BitVector 16)

  16-bits data of input a, default = 0

• b :: Signal dom (BitVector 16)

  16-bits data of input b, default = 0

• d :: Signal dom (BitVector 16)

  16-bits data of input d, default = 0

• irsttop :: Signal dom Bit

  reset input to registers A and C. Also reset upper 8x8 multiplier output register (8x8 MAC pipeline register) 0 = not reset (default), 1 = reset

• irstbot :: Signal dom Bit

  reset input to registers B and D. Also reset lower 8x8 multiplier output register (8x8 MAC pipeline register) and the 16x16 multiplier output register (16x16 MAC pipeline register). 0 = not reset (default), 1 = reset

• orsttop :: Signal dom Bit

  reset input to top accumulator register (for adder/subtractor, accumulator, and MAC functions) 0 = not reset (default), 1 = reset

• orstbot :: Signal dom Bit

  reset input to bottom accumulator register (for adder/subtractor, accumulator, and MAC functions) 0 = not reset (default), 1 = rest

• ahold :: Signal dom Bit

  register A hold input. Control data flow input register A. 0 = load (default), 1 = hold

• bhold :: Signal dom Bit

  register B hold input. Control data flow input register B. 0 = load (default), 1 = hold

• chold :: Signal dom Bit

  register C hold input. Control data flow input register C. 0 = load (default), 1 = hold

• dhold :: Signal dom Bit

  register D hold input. Control data flow input register D. 0 = load (default), 1 = hold

• oholdtop :: Signal dom Bit

  top accumulator output register hold input. control data flow into the register. 0 = load (default), 1 = hold

• oholdbot :: Signal dom Bit

  bottom accumulator output register hold input. control data flow into the register. 0 = load (default), 1 = hold

• addsubtop :: Signal dom Bit

  add/subtract control input to top accumulator. 0 = add (default), 1 = subtract

• addsubbot :: Signal dom Bit

  add/subtract control input to bottom accumulator. 0 = add (default), 1 = subtract

• oloadtop :: Signal dom Bit

  load control input to top accumulator register (initialize on MAC function). 0 = not load (default), 1 = load data from register/input C

• oloadbot :: Signal dom Bit

  load control input to bottom accumulator register (initialize on MAC function). 0 = not load (default), 1 = load data from register/input D

• accumci :: Signal dom Bit

  cascaded accumulator carry input from previous DSP block, default = 0

• signextin :: Signal dom Bit

  sign extension input from previous DSP block, default = 0

• ci :: Signal dom Bit

  cascaded add/sub carry input from previous DSP block, default = 0

defaultInput :: Input dom

default MAC inputs

data Parameter

MAC parameters

Constructors

Parameter

Fields

• negTrigger :: Bit

  input clock polarity, 0 = rising edge (default), 1 = falling edge

• aReg :: Bit

  input A register control, 0 = not registered (default), 1 = registered

• bReg :: Bit

  input B register control, 0 = not registered (default), 1 = registered

• cReg :: Bit

  input C register control, 0 = not registered (default), 1 = registered

• dReg :: Bit

  input D register control, 0 = not registered (default), 1 = registered

• top8x8MultReg :: Bit

  top 8x8 multiplier output register control (pipeline register for MAC). 0 = not registered (default), 1 = registered

• bot8x8MultReg :: Bit

  bottom 8x8 multiplier output register control (pipeline register for MAC). 0 = not registered (default), 1 = registered

• pipeline16x16MultReg1 :: Bit

  16x16 multiplier pipeline register control. 0 = not registered (default), 1 = registered

• pipeline16x16MultReg2 :: Bit

  16x16 multiplier output register control (pipeline register for MAC). 0 = not registered (default), 1 = registered

• topOutputSelect :: BitVector 2

  top output select. 00 = adder-subtractor not registered (default), 01 = adder-subtractor registered, 10 = 8x8 multiplier, 11 = 16x16 multiplier

• topAddSubLowerInput :: BitVector 2

  input X of upper adder-subtractor. 00 = input A (default), 01 = 8x8 multiplier output at top, 10 = 16x16 multiplier upper 16-bit outputs, 11 = sign extension from Z15 (lower adder-subtractor input)

• topAddSubUpperInput :: Bit

  input W of upper adder-subtractor. 0 = output of adder-subtractor register (accumulation function) (default), 1 = input C

• topAddSubCarrySelect :: BitVector 2

  carry input select top adder-subtractor, 00 = constant 0 (default), 01 = constant 1, 10 = cascade ACCUMOUT from lower adder-subtractor, 11 = cascade CO from lower adder-subtractor

• botOutputSelect :: BitVector 2

  bottom output select. 00 = adder-subtractor not registered (default), 01 = adder-subtractor registered, 10 = 8x8 multiplier, 16x16 multiplier

• botAddSubLowerInput :: BitVector 2

  input Z of upper adder-subtractor. 00 = input B (default), 01 = 8x8 multiplier output at top, 10 = 16x16 multiplier upper 16-bit outputs, 11 = sign extension from SIGNEXTIN

• botAddSubUpperInput :: Bit

  input Y of upper adder-subtractor. 0 = output of adder-subtractor output register (accumulation function) (default), 1 = input D

• botAddSubCarrySelect :: BitVector 2

  carry input select bottom adder-subtractor. 00 = constant 0 (default), 01 = constant 1, 10 = cascade ACCUMOUT from lower DSP block, 11 = cascade CO from lower DSP block

• mode8x8 :: Bit

  select 8x8 multiplier mode (power saving. 0 = not selected (default), 1 = selected

• aSigned :: Bit

  input A sign. 0 = input A is unsigned (default), 1 = input A is signed

• bSigned :: Bit

  input B sign. 0 = input B is unsigned (default), 1 = input B is signed

defaultParameter :: Parameter

default MAC parameters