def forward(self, input, label):
# --------------------------- cos(theta) & phi(theta) ---------------------------
if self.device_id == None:
cosine = F.linear(F.normalize(input), F.normalize(self.weight))
else:
x = input
sub_weights = torch.chunk(self.weight, len(self.device_id), dim=0)
temp_x = x.cuda(self.device_id[0])
weight = sub_weights[0].cuda(self.device_id[0])
cosine = F.linear(F.normalize(temp_x), F.normalize(weight))
for i in range(1, len(self.device_id)):
temp_x = x.cuda(self.device_id[i])
weight = sub_weights[i].cuda(self.device_id[i])
cosine = torch.cat((cosine, F.linear(F.normalize(temp_x), F.normalize(weight)).cuda(self.device_id[0])), dim=1)
sine = torch.sqrt(1.0 - torch.pow(cosine, 2))
phi = cosine * self.cos_m - sine * self.sin_m
if self.easy_margin:
phi = torch.where(cosine > 0, phi, cosine)
else:
phi = torch.where(cosine > self.th, phi, cosine - self.mm)
# --------------------------- convert label to one-hot ---------------------------
one_hot = torch.zeros(cosine.size())
if self.device_id != None:
one_hot = one_hot.cuda(self.device_id[0])
one_hot.scatter_(1, label.view(-1, 1).long(), 1)
# -------------torch.where(out_i = {x_i if condition_i else y_i) -------------
output = (one_hot * phi) + ((1.0 - one_hot) * cosine) # you can use torch.where if your torch.__version__ is 0.4
output *= self.s
return output
def PeepholeLSTMCell(input: torch.Tensor,
hidden: Tuple[torch.Tensor, torch.Tensor],
w_ih: torch.Tensor,
w_hh: torch.Tensor,
w_ip: torch.Tensor,
w_fp: torch.Tensor,
w_op: torch.Tensor) -> Tuple[torch.Tensor, torch.Tensor]:
"""
An LSTM cell with peephole connections without biases.
Mostly ripped from the pytorch autograd lstm implementation.
"""
hx, cx = hidden
gates = F.linear(input, w_ih) + F.linear(hx, w_hh)
ingate, forgetgate, cellgate, outgate = gates.chunk(4, 1)
peep_i = w_ip.unsqueeze(0).expand_as(cx) * cx
ingate = ingate + peep_i
peep_f = w_fp.unsqueeze(0).expand_as(cx) * cx
forgetgate = forgetgate + peep_f
ingate = F.sigmoid(ingate)
forgetgate = F.sigmoid(forgetgate)
cellgate = F.tanh(cellgate)
cy = (forgetgate * cx) + (ingate * cellgate)
peep_o = w_op.unsqueeze(0).expand_as(cy) * cy
outgate = outgate + peep_o
hy = outgate * F.tanh(cy)
return hy, cy
def f(params, inputs, mode):
o = inputs.view(inputs.size(0), 1, 28, 28)
o = F.conv2d(o, params['conv0.weight'], params['conv0.bias'], stride=2)
o = F.relu(o)
o = F.conv2d(o, params['conv1.weight'], params['conv1.bias'], stride=2)
o = F.relu(o)
o = o.view(o.size(0), -1)
o = F.linear(o, params['linear2.weight'], params['linear2.bias'])
o = F.relu(o)
o = F.linear(o, params['linear3.weight'], params['linear3.bias'])
return o
def LSTMCell(input, hidden, w_ih, w_hh, b_ih=None, b_hh=None):
hx, cx = hidden
gates = F.linear(input, w_ih, b_ih) + F.linear(hx, w_hh, b_hh)
ingate, forgetgate, cellgate, outgate = gates.chunk(4, 1)
ingate = F.sigmoid(ingate)
forgetgate = F.sigmoid(forgetgate)
cellgate = F.tanh(cellgate)
outgate = F.sigmoid(outgate)
cy = (forgetgate * cx) + (ingate * cellgate)
hy = outgate * F.tanh(cy)
return hy, cy
def decode(self, hiddens):
"""
Given the value for the hidden activations, do a decoding pass
(update every other hidden activation and the visible input layer
"""
# starting with the hiddens,
# update the reconstructed x and every other hidden layer using the activations from layers below and above
for i in range(1, len(hiddens), 2): # odd layers
# grab the parameters to use!
(encode_w, bias), _ = self.layers[i]
# encode up from below
hidden = F.linear(input=hiddens[i-1], weight=encode_w, bias=bias)
# decode down from above (if this isn't the top layer)
if i < len(hiddens) - 1:
(encode_w1, _), decode_w = self.layers[i+1]
if decode_w is None:
decode_w = encode_w1.t()
hidden = hidden + F.linear(input=hiddens[i+1], weight=decode_w)
# pre-activation noise
hidden = self.hidden_corrupt(hidden)
# apply activation
hidden = self.hidden_act(hidden)
# post-activation noise
hidden = self.hidden_corrupt(hidden)
# donezo for the hidden layer
hiddens[i] = hidden
# now do the reconstructed x!
(encode_w1, _), decode_w = self.layers[0]
if decode_w is None:
decode_w = encode_w1.t()
x_recon = F.linear(input=hiddens[0], weight=decode_w, bias=self.visible_bias)
x_recon = self.visible_act(x_recon)
# sample from p(X|H...) - SAMPLING NEEDS TO BE CORRECT FOR INPUT TYPES I.E. FOR BINARY MNIST SAMPLING IS BINOMIAL
if self.input_sampling:
if isinstance(self.visible_act, nn.Sigmoid):
sampled = self.sampling_fn(x_recon)
else:
print("Input sampling isn't defined for activation {!s}".format(type(self.visible_act)))
sampled = x_recon
else:
sampled = x_recon
return x_recon, hiddens, sampled
def do_decode(self, siz, seq_len, context_encoding, target):
ses_inf_vec = self.ses_inf(context_encoding)
context_encoding = self.tanh(self.ses_to_dec(context_encoding))
hid_n, preds, lm_preds = context_encoding, [], []
hid_n = hid_n.view(self.num_lyr, siz, self.hid_size)
inp_tok = Variable(torch.ones(siz, 1).long())
lm_hid = Variable(torch.zeros(self.num_lyr, siz, self.hid_size))
if use_cuda:
lm_hid = lm_hid.cuda()
inp_tok = inp_tok.cuda()
for i in range(seq_len):
# initially tc_ratio is 1 but then slowly decays to 0 (to match inference time)
if torch.randn(1)[0] < self.tc_ratio:
inp_tok = target[:, i].unsqueeze(1)
inp_tok_embedding = self.embed_in(inp_tok)
emb_inf_vec = self.emb_inf(inp_tok_embedding)
inp_tok_embedding = self.drop(inp_tok_embedding)
hid_o, hid_n = self.rnn(inp_tok_embedding, hid_n)
dec_hid_vec = self.dec_inf(hid_o)
total_hid_o = dec_hid_vec + ses_inf_vec + emb_inf_vec
hid_o_mx = max_out(total_hid_o)
hid_o_mx = F.linear(hid_o_mx, self.embed_in.weight) if self.shared_weight else self.embed_out(hid_o_mx)
preds.append(hid_o_mx)
if self.train_lm:
lm_o, lm_hid = self.lm(inp_tok_embedding, lm_hid)
lm_o = self.lin3(lm_o)
lm_o = F.linear(lm_o, self.embed_in.weight) if self.shared_weight else self.embed_out(lm_o)
lm_preds.append(lm_o)
op = hid_o[:, :, :-1]
op = F.log_softmax(op, 2, 5)
max_val, inp_tok = torch.max(op, dim=2)
# now inp_tok will be val between 0 and 10002 ignoring padding_idx
# here we do greedy decoding
# so we can ignore the last symbol which is a padding token
# technically we don't need a softmax here as we just want to choose the max token, max score will result in max softmax.Duh!
dec_o = torch.cat(preds, 1)
dec_lmo = torch.cat(lm_preds, 1) if self.train_lm else None
return dec_o, dec_lmo
def _in_proj(self, input, start=0, end=None):
weight = self.in_proj_weight
bias = self.in_proj_bias
weight = weight[start:end, :]
if bias is not None:
bias = bias[start:end]
return F.linear(input, weight, bias)
def forward(self, x):
if self.device_id == None:
out = F.linear(x, self.weight, self.bias)
else:
sub_weights = torch.chunk(self.weight, len(self.device_id), dim=0)
sub_biases = torch.chunk(self.bias, len(self.device_id), dim=0)
temp_x = x.cuda(self.device_id[0])
weight = sub_weights[0].cuda(self.device_id[0])
bias = sub_biases[0].cuda(self.device_id[0])
out = F.linear(temp_x, weight, bias)
for i in range(1, len(self.device_id)):
temp_x = x.cuda(self.device_id[i])
weight = sub_weights[i].cuda(self.device_id[i])
bias = sub_biases[i].cuda(self.device_id[i])
out = torch.cat((out, F.linear(temp_x, weight, bias).cuda(self.device_id[0])), dim=1)
return out
def incremental_forward(self, input):
"""Forward convolution one time step at a time.
This function maintains an internal state to buffer signal and accepts
a single frame as input. If the input order changes between time steps,
call reorder_incremental_state. To apply to fresh inputs, call
clear_incremental_state.
"""
# reshape weight
weight = self._get_linearized_weight()
kw = self.kernel_size[0]
bsz = input.size(0) # input: bsz x len x dim
if kw > 1:
input = input.data
if self.input_buffer is None:
self.input_buffer = input.new(bsz, kw, input.size(2))
self.input_buffer.zero_()
else:
# shift buffer
self.input_buffer[:, :-1, :] = self.input_buffer[:, 1:, :].clone()
# append next input
self.input_buffer[:, -1, :] = input[:, -1, :]
input = torch.autograd.Variable(self.input_buffer, volatile=True)
output = F.linear(input.view(bsz, -1), weight, self.bias)
return output.view(bsz, 1, -1)
def forward(self, input):
self.epsilon_weight.normal_()
bias = self.bias
if bias is not None:
self.epsilon_bias.normal_()
bias = bias + self.sigma_bias * self.epsilon_bias.data
return F.linear(input, self.weight + self.sigma_weight * self.epsilon_weight.data, bias)
def forward(self, x):
# flatten input
if len(x.size()) > 2:
x = x.view(-1, int(np.prod(x.size()[1:])))
# corrupt input
x = self.input_corrupt(x)
corrupted = x
# encode
for layer in self.encode_layers:
x = layer(x)
x = F.relu(x)
# decode
if self.tied_weights:
for i, (layer, bias) in enumerate(self.decode_params):
x = F.linear(x, weight=layer.weight.t(), bias=bias)
if i == len(self.decode_params)-1:
x = self.visible_act(x)
else:
x = F.relu(x)
else:
for i, layer in enumerate(self.decode_layers):
x = layer(x)
if i == len(self.decode_layers)-1:
x = self.visible_act(x)
else:
x = F.relu(x)
return x, corrupted
def forward(self, input):
weight = self.weight
if self.shared:
# detach weight to prevent gradients from changing weight
# (but need to detach every time so weights are up to date)
weight = weight.detach()
return F.linear(input, weight, self.bias)
def F_affine3d(x, matrix, center=True):
A = matrix[:3,:3]
b = matrix[:3,3]
# make a meshgrid of normal coordinates
coords = Variable(th_iterproduct(x.size(1),x.size(2),x.size(3)).float(),
requires_grad=False)
if center:
# shift the coordinates so center is the origin
coords[:,0] = coords[:,0] - (x.size(1) / 2. + 0.5)
coords[:,1] = coords[:,1] - (x.size(2) / 2. + 0.5)
coords[:,2] = coords[:,2] - (x.size(3) / 2. + 0.5)
# apply the coordinate transformation
new_coords = F.linear(coords, A, b)
if center:
# shift the coordinates back so origin is origin
new_coords[:,0] = new_coords[:,0] + (x.size(1) / 2. + 0.5)
new_coords[:,1] = new_coords[:,1] + (x.size(2) / 2. + 0.5)
new_coords[:,2] = new_coords[:,2] + (x.size(3) / 2. + 0.5)
# map new coordinates using bilinear interpolation
x_transformed = F_trilinear_interp3d(x, new_coords)
return x_transformed
def regression_step(self, sequence_hiddens):
"""
Given the history list of GSN hiddens, make the next full list of gsn hiddens from our regression parameters
"""
sequence_reverse = sequence_hiddens[::-1]
hiddens = []
for layer, _ in enumerate(self.sizes[1:]):
if layer % 2 == 0:
# do the window calculation for the layer!
regression_terms = []
for window in range(self.window_size):
if window < len(sequence_reverse):
regression_weight = self.regression_weights[layer][window]
regression_bias = self.regression_biases[layer] if window == 0 else None
regression_terms.append(
F.linear(
input=sequence_reverse[window][layer], weight=regression_weight, bias=regression_bias
)
)
else:
regression_terms.append(self.missing_biases[layer][window])
hiddens.append(sum(regression_terms))
else:
hiddens.append(None)
return hiddens
def forward(self, x):
lrt_mean = self.bias
lrt_std = torch.sqrt_(1e-16 + F.linear(x * x, self.sigma * self.sigma))
if self.training:
eps = Variable(lrt_std.data.new(lrt_std.size()).normal_())
else:
eps = 0.0
return lrt_mean + eps * lrt_std
def forward(self, x):
if self.training:
eps = Variable(torch.bernoulli(self.probs) - 0.5)
else:
eps = 0.0
output = F.linear(x, self.W*eps)
if self.bias is not None:
output = output + self.bias
return output
def forward(self, x):
if self.training:
eps = Variable(self.W.data.new(self.W.size()).uniform_() - 0.5)
else:
eps = 0.0
output = F.linear(x, self.W*eps)
if self.bias is not None:
output = output + self.bias
return output
def forward(self, x):
if self.zero_mean:
lrt_mean = 0.0
else:
lrt_mean = F.linear(x, self.W)
if self.bias is not None:
lrt_mean = lrt_mean + self.bias
sigma2 = Variable.exp(self.log_alpha) * self.W * self.W
if self.permute_sigma:
sigma2 = sigma2.view(-1)[torch.randperm(self.in_features * self.out_features).cuda()].view(self.out_features, self.in_features)
lrt_std = Variable.sqrt(1e-16 + F.linear(x * x, sigma2))
if self.training:
eps = Variable(lrt_std.data.new(lrt_std.size()).normal_())
else:
eps = 0.0
return lrt_mean + lrt_std * eps
def forward(self, x):
if self.deterministic:
assert self.training == False, "Flag deterministic is True. This should not be used in training."
return F.linear(x, self.post_weight_mu, self.bias_mu)
batch_size = x.size()[0]
# compute z
# note that we reparametrise according to [2] Eq. (11) (not [1])
z = reparametrize(self.z_mu.repeat(batch_size, 1), self.z_logvar.repeat(batch_size, 1), sampling=self.training,
cuda=self.cuda)
# apply local reparametrisation trick see [1] Eq. (6)
# to the parametrisation given in [3] Eq. (6)
xz = x * z
mu_activations = F.linear(xz, self.weight_mu, self.bias_mu)
var_activations = F.linear(xz.pow(2), self.weight_logvar.exp(), self.bias_logvar.exp())
return reparametrize(mu_activations, var_activations.log(), sampling=self.training, cuda=self.cuda)
def LSTMCell(input, hidden, w_ih, w_hh, b_ih=None, b_hh=None):
"""
A modified LSTM cell with hard sigmoid activation on the input, forget and output gates.
"""
hx, cx = hidden
gates = F.linear(input, w_ih, b_ih) + F.linear(hx, w_hh, b_hh)
ingate, forgetgate, cellgate, outgate = gates.chunk(4, 1)
ingate = hard_sigmoid(ingate)
forgetgate = hard_sigmoid(forgetgate)
cellgate = F.tanh(cellgate)
outgate = hard_sigmoid(outgate)
cy = (forgetgate * cx) + (ingate * cellgate)
hy = outgate * F.tanh(cy)
return hy, cy
def f(input, params, mode):
x = F.conv2d(input, params['conv0'], padding=1)
g0 = group(x, params, 'group0', mode, 1)
g1 = group(g0, params, 'group1', mode, 2)
g2 = group(g1, params, 'group2', mode, 2)
o = F.relu(utils.batch_norm(g2, params, 'bn', mode))
o = F.avg_pool2d(o, 8, 1, 0)
o = o.view(o.size(0), -1)
o = F.linear(o, params['fc.weight'], params['fc.bias'])
return o
def encode(self, x, hiddens):
"""
Given the value for x and hidden activations, do an encoding pass (update every other hidden activation)
"""
# starting with x and the hiddens,
# update every other hidden layer using the activations from layers below and above
corrupted_x = self.input_corrupt(x)
for i in range(0, len(hiddens), 2): # even layers
# grab the parameters to use!
(encode_w, bias), _ = self.layers[i]
# encode up from below
# if first layer, use x, otherwise use the hidden from below
if i == 0:
below = corrupted_x
else:
below = hiddens[i-1]
hidden = F.linear(input=below, weight=encode_w, bias=bias)
# decode down from above (if this isn't the top layer)
if i < len(hiddens)-1:
(encode_w1, _), decode_w = self.layers[i+1]
if decode_w is None:
decode_w = encode_w1.t()
hidden = hidden + F.linear(input=hiddens[i+1], weight=decode_w)
# pre-activation noise
if not (i == 0 and self.noiseless_h1):
hidden = self.hidden_corrupt(hidden)
# apply activation
hidden = self.hidden_act(hidden)
# post-activation noise
if not (i == 0 and self.noiseless_h1):
hidden = self.hidden_corrupt(hidden)
# donezo for the hidden layer
hiddens[i] = hidden
return hiddens
def do_decode_tc(self, context_encoding, target, target_lengths):
#print(target.size(), target_lengths)
target_emb = self.embed_in(target)
target_emb = self.drop(target_emb)
# below will be used later as a crude approximation of an LM
emb_inf_vec = self.emb_inf(target_emb)
target_emb = torch.nn.utils.rnn.pack_padded_sequence(target_emb, target_lengths, batch_first=True)
#print(context_encoding.size())
init_hidn = self.tanh(self.ses_to_dec(context_encoding))
#print(init_hidn.size())
init_hidn = init_hidn.view(self.num_lyr, target.size(0), self.hid_size)
hid_o, hid_n = self.rnn(target_emb, init_hidn)
hid_o, _ = torch.nn.utils.rnn.pad_packed_sequence(hid_o, batch_first=True)
# linear layers not compatible with PackedSequence need to unpack, will be 0s at padded timesteps!
dec_hid_vec = self.dec_inf(hid_o)
ses_inf_vec = self.ses_inf(context_encoding)
#print(dec_hid_vec.size(), ses_inf_vec.size(), emb_inf_vec.size())
total_hid_o = dec_hid_vec + ses_inf_vec + emb_inf_vec
hid_o_mx = max_out(total_hid_o)
hid_o_mx = F.linear(hid_o_mx, self.embed_in.weight) if self.shared_weight else self.embed_out(hid_o_mx)
if self.train_lm:
siz = target.size(0)
lm_hid0 = Variable(torch.zeros(self.num_lyr, siz, self.hid_size))
if use_cuda:
lm_hid0 = lm_hid0.cuda()
lm_o, lm_hid = self.lm(target_emb, lm_hid0)
lm_o, _ = torch.nn.utils.rnn.pad_packed_sequence(lm_o, batch_first=True)
lm_o = self.lin3(lm_o)
lm_o = F.linear(lm_o, self.embed_in.weight) if self.shared_weight else self.embed_out(lm_o)
return hid_o_mx, lm_o
else:
return hid_o_mx, None
def forward(self, input, label):
# --------------------------- cos(theta) & phi(theta) ---------------------------
cosine = F.linear(F.normalize(input), F.normalize(self.weight))
phi = cosine - self.m
# --------------------------- convert label to one-hot ---------------------------
one_hot = torch.zeros(cosine.size(), device = 'cuda')
# one_hot = one_hot.cuda() if cosine.is_cuda else one_hot
one_hot.scatter_(1, label.view(-1, 1).long(), 1)
# -------------torch.where(out_i = {x_i if condition_i else y_i) -------------
output = (one_hot * phi) + ((1.0 - one_hot) * cosine) # you can use torch.where if your torch.__version__ is 0.4
output *= self.s
return output
def forward(self, input):
self.epsison_input.normal_()
self.epsilon_output.normal_()
func = lambda x: torch.sign(x) * torch.sqrt(torch.abs(x))
eps_in = func(self.epsilon_input.data)
eps_out = func(self.epsilon_output.data)
bias = self.bias
if bias is not None:
bias = bias + self.sigma_bias * eps_out.t()
noise_v = torch.mul(eps_in, eps_out)
return F.linear(input, self.weight + self.sigma_weight * noise_v, bias)
def f(input, params, pooling_classif=True):
o = F.conv2d(input, params['conv0.weight'], params['conv0.bias'], 2, 3)
o = F.relu(o)
o = F.max_pool2d(o, 3, 2, 1)
o_g0 = group(o, params, 'group0', 1, blocks[0])
o_g1 = group(o_g0, params, 'group1', 2, blocks[1])
o_g2 = group(o_g1, params, 'group2', 2, blocks[2])
o_g3 = group(o_g2, params, 'group3', 2, blocks[3])
if pooling_classif:
o = F.avg_pool2d(o_g3, 7, 1, 0)
o = o.view(o.size(0), -1)
o = F.linear(o, params['fc.weight'], params['fc.bias'])
return o
def test_reuse_function(self):
@torch.jit.compile(nderivs=0)
def clinear(*args):
return F.linear(*args)
def cast(x):
return x
input = Variable(cast(torch.randn(1, 1)))
weights = Variable(cast(torch.randn(1, 1)))
bias = Variable(cast(torch.randn(1, 1)))
# linear AKA addmm without bias is of particular interest
# because we allocate a zero-filled new variable when we execute,
# and then *fill* it with the result
r1_ = clinear(input, weights)
with self.assertCompiled(clinear):
r1 = clinear(r1_, weights)
r2 = F.linear(F.linear(input, weights), weights)
self.assertEqual(r1, r2)
def forward(self, X):
"""
Funciton call to generate the output, every time we call it, the dynamic graph is created.
There can be difference between forward in training and test:
- In dropout we do not zero neurons in test
- In Variational Inference we dont randombly sample from the posterior
We create the forward pass by performing operations between the input X (Nsam_batch, Ndim)
and the parameters of the model that we should have initialized in the __init__
"""
# o2 = torch.mm(X, self.weight) + self.bias
o2 = F.linear(X, self.weight, self.bias)
return o2
def forward(self, x, label):
cosine = F.linear(F.normalize(x), F.normalize(self.weight))
sine = torch.sqrt(1.0 - torch.pow(cosine, 2))
phi = cosine * self.cos_m - sine * self.sin_m
if self.easy_margin:
phi = torch.where(cosine > 0, phi, cosine)
else:
phi = torch.where((cosine - self.th) > 0, phi, cosine - self.mm)
one_hot = torch.zeros(cosine.size(), device='cuda')
one_hot.scatter_(1, label.view(-1, 1).long(), 1)
output = (one_hot * phi) + ((1.0 - one_hot) * cosine)
output *= self.s
return output
def forward(self, input, label):
# lambda = max(lambda_min,base*(1+gamma*iteration)^(-power))
self.iter += 1
self.lamb = max(self.LambdaMin, self.base * (1 + self.gamma * self.iter) ** (-1 * self.power))
# --------------------------- cos(theta) & phi(theta) ---------------------------
if self.device_id == None:
cos_theta = F.linear(F.normalize(input), F.normalize(self.weight))
else:
x = input
sub_weights = torch.chunk(self.weight, len(self.device_id), dim=0)
temp_x = x.cuda(self.device_id[0])
weight = sub_weights[0].cuda(self.device_id[0])
cos_theta = F.linear(F.normalize(temp_x), F.normalize(weight))
for i in range(1, len(self.device_id)):
temp_x = x.cuda(self.device_id[i])
weight = sub_weights[i].cuda(self.device_id[i])
cos_theta = torch.cat((cos_theta, F.linear(F.normalize(temp_x), F.normalize(weight)).cuda(self.device_id[0])), dim=1)
cos_theta = cos_theta.clamp(-1, 1)
cos_m_theta = self.mlambda[self.m](cos_theta)
theta = cos_theta.data.acos()
k = (self.m * theta / 3.14159265).floor()
phi_theta = ((-1.0) ** k) * cos_m_theta - 2 * k
NormOfFeature = torch.norm(input, 2, 1)
# --------------------------- convert label to one-hot ---------------------------
one_hot = torch.zeros(cos_theta.size())
if self.device_id != None:
one_hot = one_hot.cuda(self.device_id[0])
one_hot.scatter_(1, label.view(-1, 1), 1)
# --------------------------- Calculate output ---------------------------
output = (one_hot * (phi_theta - cos_theta) / (1 + self.lamb)) + cos_theta
output *= NormOfFeature.view(-1, 1)
return output
def linear_classifier(x, param_dict):
"""
Classifier.
"""
return F.linear(x, param_dict['weight_mean'], param_dict['bias_mean'])
def forward(self, x, time):
o = self.context[:, int(time)]
return F.linear(x * o, self.weight, self.bias)
def forward(self, input):
return F.linear(input, self.mask * self.weight, self.bias)
def _forward(self, x, weights):
x = torch.flatten(x)
x = F.linear(x, weights['lin.weight'], bias=weights['lin.bias'])
x = x.reshape((1, 10, self.largest_w, self.largest_h))
return x
def test_jit_class_using_function():
LinearJIT = nnfusion.jit(torch.nn.Linear)
model = LinearJIT(8, 8).cuda().eval()
t = torch.randn(1, 8, device="cuda")
assert_allclose(F.linear(t, model.weight, model.bias), model(t))
def forward(self, x):
out = F.linear(F.normalize(x), F.normalize(self.weight))
return out
def _forward_rho(rho, incr, ctx, input, weight, bias):
ctx.save_for_backward(input, weight, bias)
ctx.rho = rho
ctx.incr = incr
return F.linear(input, weight, bias)
def _forward_alpha_beta(ctx, input, weight, bias):
Z = F.linear(input, weight, bias)
ctx.save_for_backward(input, weight, bias)
return Z
def forward(self, x, vars=None, bn_training=True):
"""
This function can be called by finetunning, however, in finetunning, we dont wish to update
running_mean/running_var. Thought weights/bias of bn is updated, it has been separated by fast_weights.
Indeed, to not update running_mean/running_var, we need set update_bn_statistics=False
but weight/bias will be updated and not dirty initial theta parameters via fast_weiths.
:param x: [b, 1, 28, 28]
:param vars:
:param bn_training: set False to not update
:return: x, loss, likelihood, kld
"""
if vars is None:
vars = self.vars
idx = 0
bn_idx = 0
for name, param in self.config:
if name is 'conv2d':
w, b = vars[idx], vars[idx + 1]
# remember to keep synchrozied of forward_encoder and forward_decoder!
x = F.conv2d(x, w, b, stride=param[4], padding=param[5])
idx += 2
# print(name, param, '\tout:', x.shape)
elif name is 'convt2d':
w, b = vars[idx], vars[idx + 1]
# remember to keep synchrozied of forward_encoder and forward_decoder!
x = F.conv_transpose2d(x,
w,
b,
stride=param[4],
padding=param[5])
idx += 2
# print(name, param, '\tout:', x.shape)
elif name is 'linear':
w, b = vars[idx], vars[idx + 1]
x = F.linear(x, w, b)
idx += 2
# print('forward:', idx, x.norm().item())
elif name is 'bn':
w, b = vars[idx], vars[idx + 1]
running_mean, running_var = self.vars_bn[bn_idx], self.vars_bn[
bn_idx + 1]
x = F.batch_norm(x,
running_mean,
running_var,
weight=w,
bias=b,
training=bn_training)
idx += 2
bn_idx += 2
elif name is 'flatten':
# print(x.shape)
x = x.view(x.size(0), -1)
elif name is 'reshape':
# [b, 8] => [b, 2, 2, 2]
x = x.view(x.size(0), *param)
elif name is 'relu':
x = F.relu(x, inplace=param[0])
elif name is 'leakyrelu':
x = F.leaky_relu(x, negative_slope=param[0], inplace=param[1])
elif name is 'tanh':
x = F.tanh(x)
elif name is 'sigmoid':
x = torch.sigmoid(x)
elif name is 'upsample':
x = F.upsample_nearest(x, scale_factor=param[0])
elif name is 'max_pool2d':
x = F.max_pool2d(x, param[0], param[1], param[2])
elif name is 'avg_pool2d':
x = F.avg_pool2d(x, param[0], param[1], param[2])
else:
raise NotImplementedError
# make sure variable is used properly
assert idx == len(vars)
assert bn_idx == len(self.vars_bn)
return x
def forward(self, x):
return F.linear(x,
self.weight + self.sigma_weight * self.epsilon_weight,
self.bias + self.sigma_bias * self.epsilon_bias)
def f(x):
for (weight, bias, act, norm) in zip(weights, biases, self.acts,
self.layer_norms):
x = norm(act(self.dropout(F.linear(x, weight, bias))))
return x
def forward(self,
prev_output_tokens,
encoder_out_dict,
incremental_state=None):
encoder_out = encoder_out_dict['encoder_out']
encoder_padding_mask = encoder_out_dict['encoder_padding_mask']
if incremental_state is not None:
prev_output_tokens = prev_output_tokens[:, -1:]
bsz, seqlen = prev_output_tokens.size()
# get outputs from encoder
encoder_outs, _, _ = encoder_out[:3]
srclen = encoder_outs.size(0)
# embed tokens
x = self.embed_tokens(prev_output_tokens)
x = F.dropout(x, p=self.dropout_in, training=self.training)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
# initialize previous states (or get from cache during incremental generation)
cached_state = utils.get_incremental_state(self, incremental_state,
'cached_state')
if cached_state is not None:
prev_hiddens, prev_cells, input_feed = cached_state
else:
_, encoder_hiddens, encoder_cells = encoder_out[:3]
num_layers = len(self.layers)
prev_hiddens = [encoder_hiddens[i] for i in range(num_layers)]
prev_cells = [encoder_cells[i] for i in range(num_layers)]
input_feed = x.data.new(bsz, self.encoder_output_units).zero_()
attn_scores = x.data.new(srclen, seqlen, bsz).zero_()
outs = []
for j in range(seqlen):
# input feeding: concatenate context vector from previous time step
input = torch.cat((x[j, :, :], input_feed), dim=1)
for i, rnn in enumerate(self.layers):
# recurrent cell
hidden, cell = rnn(input, (prev_hiddens[i], prev_cells[i]))
# hidden state becomes the input to the next layer
input = F.dropout(hidden,
p=self.dropout_out,
training=self.training)
# save state for next time step
prev_hiddens[i] = hidden
prev_cells[i] = cell
# apply attention using the last layer's hidden state
if self.attention is not None:
out, attn_scores[:, j, :] = self.attention(
hidden, encoder_outs, encoder_padding_mask)
else:
out = hidden
out = F.dropout(out, p=self.dropout_out, training=self.training)
# input feeding
input_feed = out
# save final output
outs.append(out)
# cache previous states (no-op except during incremental generation)
utils.set_incremental_state(self, incremental_state, 'cached_state',
(prev_hiddens, prev_cells, input_feed))
# collect outputs across time steps
x = torch.cat(outs, dim=0).view(seqlen, bsz, self.hidden_size)
# T x B x C -> B x T x C
x = x.transpose(1, 0)
# srclen x tgtlen x bsz -> bsz x tgtlen x srclen
if not self.training and self.need_attn:
attn_scores = attn_scores.transpose(0, 2)
else:
attn_scores = None
# project back to size of vocabulary
if self.adaptive_softmax is None:
if hasattr(self, 'additional_fc'):
x = self.additional_fc(x)
x = F.dropout(x, p=self.dropout_out, training=self.training)
if self.share_input_output_embed:
x = F.linear(x, self.embed_tokens.weight)
else:
x = self.fc_out(x)
return x, attn_scores
def h_to_v(self, h):
p_v = Function.sigmoid(Function.linear(h, self.W.t(), self.v_bias))
sample_v = self.sample_p(p_v)
return p_v, sample_v
def linear_biprec(input, weight, bias=None, num_bits_grad=None):
out1 = F.linear(input.detach(), weight, bias)
out2 = F.linear(input, weight.detach(),
bias.detach() if bias is not None else None)
out2 = quantize_grad(out2, num_bits=num_bits_grad)
return out1 + out2 - out1.detach()
def v_to_h(self, v):
p_h = Function.sigmoid(Function.linear(v, self.W, self.h_bias))
sample_h = self.sample_p(p_h)
return p_h, sample_h
def forward(self, x):
return F.linear(x, self.W_(), self.bias)
def forward(self, x):
return F.linear(x, self.omega * self.weight, self.beta * self.bias)
def forward(self, u, y=None):
x = F.linear(u, self.weight, self.bias)
if y is not None:
x += F.linear(y, self.weight, self.bias)
return x
def forward(self, x):
out = F.linear(x, self.weight, self.bias)
out = self.activation(out)
return out
def forward(self, input):
return F.linear(input, self.weight * self.lr_mul, bias=self.bias * self.lr_mul)
def forward(self, x):
W = self.weight * self.weight_scale / torch.sqrt(
torch.sum(self.weight**2, dim=1, keepdim=True))
return F.linear(x, W, self.bias)
def IndRNNTanhCell(input, hidden, w_ih, w_hh, b_ih=None):
hy = F.tanh(F.linear(input, w_ih, b_ih) + F.mul(w_hh, hidden))
return hy
def IndRNNReLuCell(input, hidden, w_ih, w_hh, b_ih=None):
hy = F.relu(F.linear(input, w_ih, b_ih) + F.mul(w_hh, hidden))
return hy
def free_energy_cost(self, v):
vbias_term = v.mv(self.v_bias)
wx_b = Function.linear(v, self.W, self.h_bias)
hidden_term = wx_b.exp().add(1).log().sum(1)
return (-hidden_term - vbias_term).mean()
def decode(self, x):
maskedweight = self.weight * self.mask
catweight = torch.cat((maskedweight, self.weight_fc), dim=0)
return F.linear(x, catweight.t(), self.vbias)
def forward(self, features):
cosine = F.linear(l2_norm(features), l2_norm(self.weight))
return cosine
def forward(self, x):
maskedweight = self.weight * self.mask
catweight = torch.cat((maskedweight, self.weight_fc), dim=0)
catbias = torch.cat((self.bias, self.bias_fc))
return self.dropout(self.enc_act_func(F.linear(x, catweight, catbias)))
def _forward_pattern(attribution, ctx, input, weight, bias, pattern):
ctx.save_for_backward(input, weight, pattern)
ctx.attribution = attribution
return F.linear(input, weight, bias)
def forward(self, prev_output_tokens, encoder_out=None, incremental_state=None):
"""
Args:
prev_output_tokens (LongTensor): previous decoder outputs of shape
`(batch, tgt_len)`, for input feeding/teacher forcing
encoder_out (Tensor, optional): output from the encoder, used for
encoder-side attention
incremental_state (dict): dictionary used for storing state during
:ref:`Incremental decoding`
Returns:
tuple:
- the last decoder layer's output of shape `(batch, tgt_len,
vocab)`
- the last decoder layer's attention weights of shape `(batch,
tgt_len, src_len)`
"""
# embed positions
positions = self.embed_positions(
prev_output_tokens,
incremental_state=incremental_state,
) if self.embed_positions is not None else None
if incremental_state is not None:
prev_output_tokens = prev_output_tokens[:, -1:]
if positions is not None:
positions = positions[:, -1:]
# embed tokens and positions
x = self.embed_scale * self.embed_tokens(prev_output_tokens)
if self.project_in_dim is not None:
x = self.project_in_dim(x)
if positions is not None:
x += positions
x = F.dropout(x, p=self.dropout, training=self.training)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
attn = None
inner_states = [x]
# decoder layers
for layer in self.layers:
x, attn = layer(
x,
encoder_out['encoder_out'] if encoder_out is not None else None,
encoder_out['encoder_padding_mask'] if encoder_out is not None else None,
incremental_state,
self_attn_mask=self.buffered_future_mask(x) if incremental_state is None else None,
)
inner_states.append(x)
if self.normalize:
x = self.layer_norm(x)
# T x B x C -> B x T x C
x = x.transpose(0, 1)
if self.project_out_dim is not None:
x = self.project_out_dim(x)
if self.adaptive_softmax is None:
# project back to size of vocabulary
if self.share_input_output_embed:
x = F.linear(x, self.embed_tokens.weight)
else:
x = F.linear(x, self.embed_out)
return x, {'attn': attn, 'inner_states': inner_states}
def forward(self, x, weights=None, get_feat=False):
if weights == None:
# block1
x = F.relu(self.bn1(self.conv1(x)))
x = F.relu(self.bn2(self.conv2(x)))
x = self.pool(x)
# block2
x = F.relu(self.bn3(self.conv3(x)))
x = F.relu(self.bn4(self.conv4(x)))
x = self.pool(x)
# block3
x = F.relu(self.bn5(self.conv5(x)))
x = F.relu(self.bn6(self.conv6(x)))
x = self.pool(x)
x = x.view(-1, 196 * 4 * 4)
feat = F.relu(self.bn7(self.fc1(x)))
x = self.fc2(feat)
if get_feat:
return x, feat
else:
return x
else:
list_weights = list(weights.items())
count = 0
#block1
x = F.conv2d(x,
list_weights[count][1],
list_weights[count + 1][1],
padding=1,
stride=1)
count += 2
x = F.batch_norm(x,
self.bn1.running_mean,
self.bn1.running_var,
list_weights[count][1],
list_weights[count + 1][1],
training=True)
count += 2
x = F.threshold(x, 0, 0, inplace=True)
x = F.conv2d(x,
list_weights[count][1],
list_weights[count + 1][1],
padding=1,
stride=1)
count += 2
x = F.batch_norm(x,
self.bn2.running_mean,
self.bn2.running_var,
list_weights[count][1],
list_weights[count + 1][1],
training=True)
count += 2
x = F.threshold(x, 0, 0, inplace=True)
x = F.max_pool2d(x, kernel_size=2, stride=2)
#block2
x = F.conv2d(x,
list_weights[count][1],
list_weights[count + 1][1],
padding=1,
stride=1)
count += 2
x = F.batch_norm(x,
self.bn3.running_mean,
self.bn3.running_var,
list_weights[count][1],
list_weights[count + 1][1],
training=True)
count += 2
x = F.threshold(x, 0, 0, inplace=True)
x = F.conv2d(x,
list_weights[count][1],
list_weights[count + 1][1],
padding=1,
stride=1)
count += 2
x = F.batch_norm(x,
self.bn4.running_mean,
self.bn4.running_var,
list_weights[count][1],
list_weights[count + 1][1],
training=True)
count += 2
x = F.threshold(x, 0, 0, inplace=True)
x = F.max_pool2d(x, kernel_size=2, stride=2)
#block3
x = F.conv2d(x,
list_weights[count][1],
list_weights[count + 1][1],
padding=1,
stride=1)
count += 2
x = F.batch_norm(x,
self.bn5.running_mean,
self.bn5.running_var,
list_weights[count][1],
list_weights[count + 1][1],
training=True)
count += 2
x = F.threshold(x, 0, 0, inplace=True)
x = F.conv2d(x,
list_weights[count][1],
list_weights[count + 1][1],
padding=1,
stride=1)
count += 2
x = F.batch_norm(x,
self.bn6.running_mean,
self.bn6.running_var,
list_weights[count][1],
list_weights[count + 1][1],
training=True)
count += 2
x = F.threshold(x, 0, 0, inplace=True)
x = F.max_pool2d(x, kernel_size=2, stride=2)
x = x.view(-1, 196 * 4 * 4)
x = F.linear(x, list_weights[count][1],
list_weights[count + 1][1])
count += 2
x = F.batch_norm(x,
self.bn7.running_mean,
self.bn7.running_var,
list_weights[count][1],
list_weights[count + 1][1],
training=True)
count += 2
feat = F.threshold(x, 0, 0, inplace=True)
x = F.linear(feat, list_weights[count][1],
list_weights[count + 1][1])
return x