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-rw-r--r--src/math/exp10l.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/math/exp10l.c b/src/math/exp10l.c
index 4f9469ae..b758ebff 100644
--- a/src/math/exp10l.c
+++ b/src/math/exp10l.c
@@ -2,13 +2,14 @@
#include <float.h>
#include <math.h>
#include "libc.h"
+#include "libm.h"
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double exp10l(long double x)
{
return exp10(x);
}
-#else
+#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
long double exp10l(long double x)
{
static const long double p10[] = {
@@ -18,7 +19,9 @@ long double exp10l(long double x)
1e10, 1e11, 1e12, 1e13, 1e14, 1e15
};
long double n, y = modfl(x, &n);
- if (fabsl(n) < 16) {
+ union ldshape u = {n};
+ /* fabsl(n) < 16 without raising invalid on nan */
+ if ((u.i.se & 0x7fff) < 0x3fff+4) {
if (!y) return p10[(int)n+15];
y = exp2l(3.32192809488736234787031942948939L * y);
return y * p10[(int)n+15];