def build_hpwl(self, params, placedb, data_collections, pin_pos_op,
device):
"""
@brief compute half-perimeter wirelength
@param params parameters
@param placedb placement database
@param data_collections a collection of all data and variables required for constructing the ops
@param pin_pos_op the op to compute pin locations according to cell locations
@param device cpu or cuda
"""
wirelength_for_pin_op = hpwl.HPWL(
flat_netpin=data_collections.flat_net2pin_map,
netpin_start=data_collections.flat_net2pin_start_map,
pin2net_map=data_collections.pin2net_map,
net_weights=data_collections.net_weights,
net_mask=data_collections.net_mask_all,
algorithm='net-by-net',
num_threads=params.num_threads)
# wirelength for position
def build_wirelength_op(pos):
return wirelength_for_pin_op(pin_pos_op(pos))
return build_wirelength_op
def test_hpwlRandom(self):
pin_pos = np.array(
[[0.0, 0.0], [1.0, 2.0], [1.5, 0.2], [0.5, 3.1], [0.6, 1.1]],
dtype=np.float32)
net2pin_map = np.array([np.array([0, 4]), np.array([1, 2, 3])])
pin_x = pin_pos[:, 0]
pin_y = pin_pos[:, 1]
# construct flat_net2pin_map and flat_net2pin_start_map
# flat netpin map, length of #pins
flat_net2pin_map = np.zeros(len(pin_pos), dtype=np.int32)
# starting index in netpin map for each net, length of #nets+1, the last entry is #pins
flat_net2pin_start_map = np.zeros(len(net2pin_map) + 1, dtype=np.int32)
count = 0
for i in range(len(net2pin_map)):
flat_net2pin_map[count:count +
len(net2pin_map[i])] = net2pin_map[i]
flat_net2pin_start_map[i] = count
count += len(net2pin_map[i])
flat_net2pin_start_map[len(net2pin_map)] = len(pin_pos)
print("flat_net2pin_map = ", flat_net2pin_map)
print("flat_net2pin_start_map = ", flat_net2pin_start_map)
# construct pin2net_map
pin2net_map = np.zeros(len(pin_pos), dtype=np.int32)
for i in range(len(net2pin_map)):
for pin_id in net2pin_map[i]:
pin2net_map[pin_id] = i
print("pin2net_map = ", pin2net_map)
# net degrees
net_degrees = np.array([len(net2pin) for net2pin in net2pin_map])
net_mask = (net_degrees <= np.amax(net_degrees)).astype(np.uint8)
print("net_mask = ", net_mask)
golden_value = all_hpwl(pin_x, pin_y, net2pin_map)
print("golden_value = ", golden_value)
# test cpu
print(np.transpose(pin_pos))
pin_pos_var = Variable(torch.from_numpy(pin_pos))
print(pin_pos_var)
# clone is very important, because the custom op cannot deep copy the data
pin_pos_var = torch.t(pin_pos_var).contiguous()
#pdb.set_trace()
custom = hpwl.HPWL(
flat_netpin=torch.from_numpy(flat_net2pin_map),
netpin_start=torch.from_numpy(flat_net2pin_start_map),
pin2net_map=torch.from_numpy(pin2net_map),
net_mask=torch.from_numpy(net_mask),
algorithm='net-by-net')
hpwl_value = custom.forward(pin_pos_var)
print("hpwl_value = ", hpwl_value.data.numpy())
np.testing.assert_allclose(hpwl_value.data.numpy(), golden_value)
# test gpu
if torch.cuda.device_count():
custom_cuda = hpwl.HPWL(
flat_netpin=torch.from_numpy(flat_net2pin_map).cuda(),
netpin_start=torch.from_numpy(flat_net2pin_start_map).cuda(),
pin2net_map=torch.from_numpy(pin2net_map).cuda(),
net_mask=torch.from_numpy(net_mask).cuda(),
algorithm='net-by-net')
hpwl_value = custom_cuda.forward(pin_pos_var.cuda())
print("hpwl_value cuda = ", hpwl_value.data.cpu().numpy())
np.testing.assert_allclose(hpwl_value.data.cpu().numpy(),
golden_value)
# test atomic cpu
custom_atomic = hpwl.HPWL(
flat_netpin=torch.from_numpy(flat_net2pin_map),
netpin_start=torch.from_numpy(flat_net2pin_start_map),
pin2net_map=torch.from_numpy(pin2net_map),
net_mask=torch.from_numpy(net_mask),
algorithm='atomic')
hpwl_value = custom_atomic.forward(pin_pos_var)
print("hpwl_value atomic = ", hpwl_value.data.numpy())
np.testing.assert_allclose(hpwl_value.data.numpy(), golden_value)
# test atomic gpu
if torch.cuda.device_count():
custom_cuda_atomic = hpwl.HPWL(
flat_netpin=torch.from_numpy(flat_net2pin_map).cuda(),
netpin_start=torch.from_numpy(flat_net2pin_start_map).cuda(),
pin2net_map=torch.from_numpy(pin2net_map).cuda(),
net_mask=torch.from_numpy(net_mask).cuda(),
algorithm='atomic')
hpwl_value = custom_cuda_atomic.forward(pin_pos_var.cuda())
print("hpwl_value cuda atomic = ", hpwl_value.data.cpu().numpy())
np.testing.assert_allclose(hpwl_value.data.cpu().numpy(),
golden_value)
