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change typecast behavior

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This commit is contained in:
justheuristic 2022-09-18 00:15:57 +03:00
parent d6e25b5f5e
commit 1145589f84
1 changed files with 1 additions and 2 deletions
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3
bitsandbytes/autograd/_functions.py
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@ -328,7 +328,6 @@ class MatMul8bitLt(torch.autograd.Function):
ctx.formatB = formatB
ctx.grad_shape = input_shape
ctx.req_grads = [requires_gradA, requires_gradB, requires_gradBias]
ctx.dtype_A, ctx.dtype_B, ctx.dtype_bias = A.dtype, B.dtype, None if bias is None else bias.dtype
if requires_gradA or requires_gradB:
@ -357,7 +356,7 @@ class MatMul8bitLt(torch.autograd.Function):
if req_gradBias:
# compute grad_bias first before changing grad_output dtype
grad_bias = grad_output.sum(0).to(ctx.bias_dtype)
grad_bias = grad_output.sum(0).to(ctx.dtype_bias)
# Cast grad_output to fp16
if len(grad_output.shape) == 3: