fix broken thread list unlocking after fork

[musl] / src / math / exp10f.c

diff --git a/src/math/exp10f.c b/src/math/exp10f.c
index 5fd1af9..d009f0a 100644 (file)
--- a/src/math/exp10f.c
+++ b/src/math/exp10f.c
@@ -1,6 +1,6 @@
 #define _GNU_SOURCE
 #include <math.h>
-#include "libc.h"
+#include <stdint.h>
 
 float exp10f(float x)
 {
@@ -9,7 +9,9 @@ float exp10f(float x)
                1, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7
        };
        float n, y = modff(x, &n);
-       if (fabsf(n) < 8) {
+       union {float f; uint32_t i;} u = {n};
+       /* fabsf(n) < 8 without raising invalid on nan */
+       if ((u.i>>23 & 0xff) < 0x7f+3) {
                if (!y) return p10[(int)n+7];
                y = exp2f(3.32192809488736234787031942948939f * y);
                return y * p10[(int)n+7];