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Merge pull request #5670 from max-kudinov/gowin_mult

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Gowin: Add DSP inference for GW1N and GW2A
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Miodrag Milanović 2026-02-12 14:30:27 +01:00 • committed by GitHub
commit e4b32d6aae
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5 changed files with 233 additions and 10 deletions
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53
tests/arch/gowin/mul_gw1n.ys Normal file
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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 gw1n
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 gw1n -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 gw1n
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
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
cd top # Constrain all select calls below inside the top module
select -assert-count 2 t:MULT18X18

53
tests/arch/gowin/mul_gw2a.ys Normal file
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@ -0,0 +1,53 @@
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