Author: Armin Rigo <ar...@tunes.org>
Branch:
Changeset: r69100:dd43ba74cfeb
Date: 2014-02-08 11:19 +0100
http://bitbucket.org/pypy/pypy/changeset/dd43ba74cfeb/
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
@@ -275,6 +275,9 @@
def same_constant(self, other):
if isinstance(other, ConstFloat):
+ # careful in this comparison: if self.value and other.value
+ # are both NaN, stored as regular floats, then it will turn
+ # out to be false...
return (longlong.extract_bits(self.value) ==
longlong.extract_bits(other.value))
return False
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