[GitHub] [incubator-tvm] yzhliu edited a comment on issue #4382: [TOPI] Fix flaky testcase for floor div

[GitBox <gi...@apache.org>]

yzhliu edited a comment on issue #4382: [TOPI] Fix flaky testcase for floor div
URL: https://github.com/apache/incubator-tvm/pull/4382#issuecomment-556989979
 
 
   @tqchen I'm afraid the flaky is not only from that around 0.5, I find a case:
   ```python
   import tvm
   import topi
   import numpy as np
   
   dtype = "float32"
   A = tvm.placeholder(name="A", shape=(1,), dtype=dtype)
   B = tvm.placeholder(name="B", shape=(1,), dtype=dtype)
   C = topi.floor_divide(A, B)
   
   with tvm.target.create("llvm"):
       s = topi.generic.schedule_broadcast(C)
       foo = tvm.build(s, [A, B, C], "llvm")
   
   ctx = tvm.cpu()
   #a = np.array([-89.50379]).astype(dtype)
   #b = np.array([7.458649]).astype(dtype)
   a = np.array([94.90735]).astype(dtype)
   b = np.array([0.6731018]).astype(dtype)
   lhs_nd = tvm.nd.array(a, ctx)
   rhs_nd = tvm.nd.array(b, ctx)
   
   out_nd = tvm.nd.array(np.empty((1,)).astype(C.dtype), ctx)
   foo(lhs_nd, rhs_nd, out_nd)
   print("tvm", out_nd.asnumpy())
   print("np", np.floor_divide(a, b))
   print("python", 94.90735 / 0.6731018)
   ```
   
   ```
   $ python test.py 
   tvm [141.]
   np [140.]
   python 140.99999435449436
   ```

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