read_verilog ../common/mul.v
chparam -set X_WIDTH 8 -set Y_WIDTH 8 -set A_WIDTH 16
hierarchy -top top
proc
# equivalence checking is somewhat slow (and missing simulation models)
synth_gowin -family gw2a
cd top # Constrain all select calls below inside the top module
select -assert-count 1 t:MULT9X9


# Make sure that DSPs are not inferred with -nodsp option
design -reset
read_verilog ../common/mul.v
chparam -set X_WIDTH 8 -set Y_WIDTH 8 -set A_WIDTH 16
hierarchy -top top
proc
synth_gowin -family gw2a -nodsp
cd top # Constrain all select calls below inside the top module
select -assert-none t:MULT9X9


design -reset
read_verilog ../common/mul.v
chparam -set X_WIDTH 16 -set Y_WIDTH 16 -set A_WIDTH 32
hierarchy -top top
proc
synth_gowin -family gw2a
cd top # Constrain all select calls below inside the top module
select -assert-count 1 t:MULT18X18


design -reset
read_verilog ../common/mul.v
chparam -set X_WIDTH 32 -set Y_WIDTH 32 -set A_WIDTH 64
hierarchy -top top
proc
# equivalence checking is too slow here
synth_gowin -family gw2a
cd top # Constrain all select calls below inside the top module
select -assert-count 1 t:MULT36X36


# We end up with two 18x18 multipliers
# 36x36 min width is 22
design -reset
read_verilog ../common/mul.v
chparam -set X_WIDTH 32 -set Y_WIDTH 16 -set A_WIDTH 48
hierarchy -top top
proc
# equivalence checking is too slow here
synth_gowin -family gw2a
cd top # Constrain all select calls below inside the top module
select -assert-count 2 t:MULT18X18