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-rw-r--r--src/math/logbf.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/src/math/logbf.c b/src/math/logbf.c
index 934827f8..950d3569 100644
--- a/src/math/logbf.c
+++ b/src/math/logbf.c
@@ -1,12 +1,10 @@
-#include <limits.h>
#include "libm.h"
-float logbf(float x) {
- int i = ilogbf(x);
-
- if (i == FP_ILOGB0)
- return -1.0f/fabsf(x);
- if (i == FP_ILOGBNAN || i == INT_MAX)
+float logbf(float x)
+{
+ if (!isfinite(x))
return x * x;
- return i;
+ if (x == 0)
+ return -1/(x+0);
+ return ilogbf(x);
}