def round_weight_each_step(self, weight, bits=16):
# print('before quantize: ', input)
# quantization v1
# if bits == 1:
# return torch.sign(weight)
# S = 2. ** (bits - 1)
# if bits > 15 or bits == 1:
# delta = 0
# else:
# delta = 1. / S
# max_val = 1 - delta
# min_val = delta - 1
# weight_clamp = torch.clamp(weight, min_val, max_val)
# qweight = torch.round(weight_clamp * S) / S
# print('after quantize: ', input_round)
# quantization v2
weight_qparams = calculate_qparams(weight,
num_bits=bits,
flatten_dims=(1, -1),
reduce_dim=None)
qweight = quantize(weight, qparams=weight_qparams)
weight_unique = torch.unique(qweight[0])
print('add weight range:', weight_unique.size()[0] - 1)
return qweight
def forward(self, input):
if self.sparsity != 0:
# apply mask
self.weight.data = self.weight.data * self.weight_mask.data
if self.quantize == True:
# quantization v2
input_q = self.quantize_input_fw(input, self.weight_bits)
weight_qparams = calculate_qparams(self.weight,
num_bits=self.weight_bits,
flatten_dims=(1, -1),
reduce_dim=None)
self.qweight = quantize(self.weight, qparams=weight_qparams)
bias_fixed_point = None
output = F.conv2d(input_q, self.qweight, None, self.stride,
self.padding)
output = quantize_grad(output,
num_bits=self.weight_bits,
flatten_dims=(1, -1))
else:
output = F.conv2d(input, self.weight, None, self.stride,
self.padding)
if self.bias:
output += self.b.unsqueeze(0).unsqueeze(2).unsqueeze(3)
return output
