Author: Armin Rigo <ar...@tunes.org>
Branch:
Changeset: r74343:fb5c0ab7038f
Date: 2014-11-05 17:06 +0100
http://bitbucket.org/pypy/pypy/changeset/fb5c0ab7038f/
Log: Add comment
diff --git a/rpython/jit/metainterp/history.py
b/rpython/jit/metainterp/history.py
--- a/rpython/jit/metainterp/history.py
+++ b/rpython/jit/metainterp/history.py
@@ -279,7 +279,8 @@
# careful in this comparison: if self.value and other.value
# are both NaN, stored as regular floats (i.e. on 64-bit),
# then just using "==" would say False: two NaNs are always
- # different from each other.
+ # different from each other. Conversely, "0.0 == -0.0" but
+ # they are not the same constant.
return (longlong.extract_bits(self.value) ==
longlong.extract_bits(other.value))
return False
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