diff options
Diffstat (limited to 'sysdeps/ieee754/flt-32/e_log2f.c')
| -rw-r--r-- | sysdeps/ieee754/flt-32/e_log2f.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sysdeps/ieee754/flt-32/e_log2f.c b/sysdeps/ieee754/flt-32/e_log2f.c index 245be4e6f7..857d13fb9b 100644 --- a/sysdeps/ieee754/flt-32/e_log2f.c +++ b/sysdeps/ieee754/flt-32/e_log2f.c @@ -17,6 +17,7 @@ #include <math.h> #include <math_private.h> +#include <fix-int-fp-convert-zero.h> static const float ln2 = 0.69314718055994530942, @@ -57,7 +58,12 @@ __ieee754_log2f(float x) dk = (float)k; f = x-(float)1.0; if((0x007fffff&(15+ix))<16) { /* |f| < 2**-20 */ - if(f==zero) return dk; + if(f==zero) + { + if (FIX_INT_FP_CONVERT_ZERO && dk == 0.0f) + dk = 0.0f; + return dk; + } R = f*f*((float)0.5-(float)0.33333333333333333*f); return dk-(R-f)/ln2; } |