yosys/tests/arch/xilinx/attributes_test.ys

# Check that blockram memory without parameters is not modified
read_verilog ../common/memory_attributes/attributes_test.v
hierarchy -top block_ram
synth_xilinx -top block_ram -noiopad
cd block_ram # Constrain all select calls below inside the top module
select -assert-count 1 t:RAMB18E1
 
# Check that distributed memory without parameters is not modified
design -reset
read_verilog ../common/memory_attributes/attributes_test.v
hierarchy -top distributed_ram
synth_xilinx -top distributed_ram -noiopad
cd distributed_ram # Constrain all select calls below inside the top module
select -assert-count 8 t:RAM32X1D
 
# Set ram_style distributed to blockram memory; will be implemented as distributed
design -reset
read_verilog ../common/memory_attributes/attributes_test.v
prep
setattr -mod -set ram_style "distributed" block_ram
synth_xilinx -top block_ram -noiopad
cd block_ram # Constrain all select calls below inside the top module
select -assert-count 32 t:RAM128X1D
 
# Set synthesis, logic_block to blockram memory; will be implemented as distributed
design -reset
read_verilog ../common/memory_attributes/attributes_test.v
prep
setattr -mod -set logic_block 1 block_ram
synth_xilinx -top block_ram -noiopad
cd block_ram # Constrain all select calls below inside the top module
select -assert-count 0 t:RAMB18E1
select -assert-count 32 t:RAM128X1D
 
# Set ram_style block to a distributed memory; will be implemented as blockram
design -reset
read_verilog ../common/memory_attributes/attributes_test.v
synth_xilinx -top distributed_ram_manual -noiopad
cd distributed_ram_manual # Constrain all select calls below inside the top module
select -assert-count 1 t:RAMB18E1
 
# Set synthesis, ram_block block to a distributed memory; will be implemented as blockram
design -reset
read_verilog ../common/memory_attributes/attributes_test.v
synth_xilinx -top distributed_ram_manual_syn -noiopad
cd distributed_ram_manual_syn # Constrain all select calls below inside the top module
select -assert-count 1 t:RAMB18E1