Update amp custom_fwd, custom_bwd usage for torch 2.4.0 compatibility #54
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In torch 2.4.0 the autocast APIs were unified under torch.amp. Usage of torch.{device}.amp will produce a deprecation warning: FutureWarning:
torch.cuda.amp.custom_fwd(args...)is deprecated. Please usetorch.amp.custom_fwd(args..., device_type='cuda')instead.This PR gates
custom_fwd/custom_bwdby version, so that < 2.4 torch is still usable. Since these ops are used for a lot of primitives I've moved them tofla.utilsand renamed them for clarity. This should still allow future support for device types other than cuda.