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loghelper(): Try to nudge the compiler into doing mults in an order that

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minimizes roundoff error.
This commit is contained in:
Tim Peters 2001-09-05 04:33:11 +00:00
parent 6fd0f0ac1e
commit e5ca6c71cd
1 changed files with 1 additions and 1 deletions
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2
Modules/mathmodule.c
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@ -263,7 +263,7 @@ loghelper(PyObject* args, double (*func)(double), char *name)
log(x) + log(2) * e * SHIFT.
CAUTION: e*SHIFT may overflow using int arithmetic,
so force use of double. */
x = func(x) + func(2.0) * (double)e * (double)SHIFT;
x = func(x) + (e * (double)SHIFT) * func(2.0);
return PyFloat_FromDouble(x);
}