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  r69459 | mark.dickinson | 2009-02-09 14:18:43 +0000 (Mon, 09 Feb 2009) | 3 lines

  Issue #4575: fix Py_IS_INFINITY macro to work correctly on x87 FPUs.
  It now forces its argument to double before testing for infinity.
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This commit is contained in:
Mark Dickinson 2009-02-09 17:15:59 +00:00
parent ae09899fa3
commit 87ec0855c6
3 changed files with 40 additions and 5 deletions
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13
Python/pymath.c
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@ -1,5 +1,18 @@
#include "Python.h"
#ifdef X87_DOUBLE_ROUNDING
/* On x86 platforms using an x87 FPU, this function is called from the
Py_FORCE_DOUBLE macro (defined in pymath.h) to force a floating-point
number out of an 80-bit x87 FPU register and into a 64-bit memory location,
thus rounding from extended precision to double precision. */
double _Py_force_double(double x)
{
volatile double y;
y = x;
return y;
}
#endif
#ifndef HAVE_HYPOT
double hypot(double x, double y)
{