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The tail end of x_sub implicitly assumed that an unsigned short

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contains 16 bits.  Not true on Cray J90.
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Tim Peters 2000-07-08 02:26:47 +00:00
parent a90b23c571
commit 43f04a36cf
1 changed files with 1 additions and 0 deletions
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Objects/longobject.c
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@ -1048,6 +1048,7 @@ x_sub(PyLongObject *a, PyLongObject *b)
borrow = a->ob_digit[i] - borrow; borrow = a->ob_digit[i] - borrow;
z->ob_digit[i] = borrow & MASK; z->ob_digit[i] = borrow & MASK;
borrow >>= SHIFT; borrow >>= SHIFT;
borrow &= 1; /* Keep only one sign bit */
} }
assert(borrow == 0); assert(borrow == 0);
if (sign < 0) if (sign < 0)