diff options
Diffstat (limited to 'numpy')
| -rw-r--r-- | numpy/core/src/math_c99.inc.src | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/numpy/core/src/math_c99.inc.src b/numpy/core/src/math_c99.inc.src index 542500d49..14399f699 100644 --- a/numpy/core/src/math_c99.inc.src +++ b/numpy/core/src/math_c99.inc.src @@ -139,8 +139,10 @@ double trunc(double x) # define isnan(x) ((x) != (x)) #endif +/* VS 2003 with /Ox optimizes (x)-(x) to 0, which is not IEEE compliant. So we + * force (x) + (-x), which seems to work. */ #if !defined(HAVE_DECL_ISFINITE) - # define isfinite(x) !isnan((x) - (x)) + # define isfinite(x) !isnan((x) + (-x)) #endif #if !defined(HAVE_DECL_ISINF) |