[GitHub] [incubator-mxnet] szha commented on a change in pull request #20338: [1.x] [FEATURE] Add API to control denormalized computations

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

szha commented on a change in pull request #20338:
URL: https://github.com/apache/incubator-mxnet/pull/20338#discussion_r657102332



##########
File path: python/mxnet/util.py
##########
@@ -848,3 +848,20 @@ def setenv(name, value):
     """
     passed_value = None if value is None else c_str(value)
     check_call(_LIB.MXSetEnv(c_str(name), passed_value))
+
+def set_flush_denorms(value):
+    """Change floating-point calculations when dealing with denormalized values.
+       This is only applicable to architectures which supports flush-to-zero.
+       Denormalized values are positive and negative values that are very close to 0
+       (exponent is the smallest possible value).
+       Flushing denormalized values to 0 can speedup calculations if such values occurs,
+       but if fulfilling whole IEEE 754 standard is required this option should be disabled.
+    Parameters
+    ----------
+    value : bool
+        State of flush-to-zero and denormals-are-zero in MXCSR register

Review comment:
       ```suggestion
   def set_flush_denorms(value):
       """Change floating-point calculations on CPU when dealing with denormalized values.
          This is only applicable to architectures which supports flush-to-zero.
          Denormalized values are positive and negative values that are very close to 0
          (exponent is the smallest possible value).
          Flushing denormalized values to 0 can speedup calculations if such values occurs,
          but if fulfilling whole IEEE 754 standard is required this option should be disabled.
   
       Parameters
       ----------
       value : bool
           State of flush-to-zero and denormals-are-zero in MXCSR register
   ```




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