STINNER Victor <victor.stin...@haypocalc.com> added the comment: Is HAVE_DECL_ISINF defined in pyconfig.h? PyLong_FromDouble() uses Py_IS_INFINITY(x): -------------------------------------- /* Py_IS_INFINITY(X) * Return 1 if float or double arg is an infinity, else 0. * Caution: * X is evaluated more than once. * This implementation may set the underflow flag if |X| is very small; * it really can't be implemented correctly (& easily) before C99. * Override in pyconfig.h if you have a better spelling on your platform. * Py_FORCE_DOUBLE is used to avoid getting false negatives from a * non-infinite value v sitting in an 80-bit x87 register such that * v becomes infinite when spilled from the register to 64-bit memory. * Note: PC/pyconfig.h defines Py_IS_INFINITY as _isinf */ #ifndef Py_IS_INFINITY # if defined HAVE_DECL_ISINF && HAVE_DECL_ISINF == 1 # define Py_IS_INFINITY(X) isinf(X) # else # define Py_IS_INFINITY(X) ((X) && \ (Py_FORCE_DOUBLE(X)*0.5 == Py_FORCE_DOUBLE(X))) # endif #endif --------------------------------------
main() in Modules/python.c starts with: -------------------------------------- /* 754 requires that FP exceptions run in "no stop" mode by default, * and until C vendors implement C99's ways to control FP exceptions, * Python requires non-stop mode. Alas, some platforms enable FP * exceptions by default. Here we disable them. */ #ifdef __FreeBSD__ fp_except_t m; m = fpgetmask(); fpsetmask(m & ~FP_X_OFL); #endif -------------------------------------- You may try to enable this code on OpenBSD, replace "#ifdef __FreeBSD__" by "#if 1". Can you also please try the following code? $ python >>> import struct >>> struct.pack("f", float("inf")) b'\x00\x00\x80\x7f' ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue12589> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com