mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-07-29 06:05:00 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

Issue #4575: fix Py_IS_INFINITY macro to work correctly on x87 FPUs.

Browse source 
It now forces its argument to double before testing for infinity.
This commit is contained in:
Mark Dickinson 2009-02-09 14:18:43 +00:00
parent b20af944d2
commit c97c9096ed
3 changed files with 40 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

13
Python/pymath.c
View file

@ -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)
{