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1 files changed, 32 insertions, 0 deletions

diff --git a/bitsandbytes/optim/sgd.py b/bitsandbytes/optim/sgd.py
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+++ b/bitsandbytes/optim/sgd.py
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+# Copyright (c) Facebook, Inc. and its affiliates. 
+#   
+# This source code is licensed under the MIT license found in the 
+# LICENSE file in the root directory of this source tree.
+from bitsandbytes.optim.optimizer import Optimizer1State
+
+class SGD(Optimizer1State):
+    def __init__(self, params, lr, momentum=0, dampening=0,
+                 weight_decay=0, nesterov=False, optim_bits=32, args=None,
+            min_8bit_size=4096, percentile_clipping=100, block_wise=True):
+        if momentum == 0:
+            raise NotImplementError(f'SGD without momentum is not supported!')
+        super(SGD, self).__init__('momentum', params, lr, (momentum, dampening), 0.0,
+                weight_decay, optim_bits, args, min_8bit_size, percentile_clipping, block_wise)
+
+class SGD8bit(Optimizer1State):
+    def __init__(self, params, lr, momentum=0, dampening=0,
+                 weight_decay=0, nesterov=False, args=None,
+            min_8bit_size=4096, percentile_clipping=100, block_wise=True):
+        if momentum == 0:
+            raise NotImplementError(f'SGD without momentum is not supported!')
+        super(SGD8bit, self).__init__('momentum', params, lr, (momentum, dampening), 0.0,
+                weight_decay, 8, args, min_8bit_size, percentile_clipping, block_wise)
+
+class SGD32bit(Optimizer1State):
+    def __init__(self, params, lr, momentum=0, dampening=0,
+                 weight_decay=0, nesterov=False, args=None,
+            min_8bit_size=4096, percentile_clipping=100, block_wise=True):
+        if momentum == 0:
+            raise NotImplementError(f'SGD without momentum is not supported!')
+        super(SGD32bit, self).__init__('momentum', params, lr, (momentum, dampening), 0.0,
+                weight_decay, 32, args, min_8bit_size, percentile_clipping, block_wise)