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math: fix logb*.c exceptions now that ilogb raises invalid

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This commit is contained in:
Szabolcs Nagy 2012-11-13 00:45:51 +01:00
commit 52bcf3f5fb
3 changed files with 17 additions and 25 deletions
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14
src/math/logbf.c
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@ -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);
}