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背景
对齐
torch.fmod
算子时,余数的正负号需与被除数一致。原来的flow.math.mod
算子符号并未完全对齐。通过abs(mod(x,y))*sign(x)
对齐遇到了这个问题torch.abs()

torch.tensor([-0.]).abs()
结果如图flow.abs()

flow.tensor([-0.]).abs()
结果如图。可能会造成一些符号无法对齐。修改后
