fix double-processing of DT_RELR relocations in ldso relocating itself

[musl] / src / math / acoshf.c

diff --git a/src/math/acoshf.c b/src/math/acoshf.c
index 4596085..b773d48 100644 (file)
--- a/src/math/acoshf.c
+++ b/src/math/acoshf.c
@@ -1,17 +1,26 @@
 #include "libm.h"
 
+#if FLT_EVAL_METHOD==2
+#undef sqrtf
+#define sqrtf sqrtl
+#elif FLT_EVAL_METHOD==1
+#undef sqrtf
+#define sqrtf sqrt
+#endif
+
 /* acosh(x) = log(x + sqrt(x*x-1)) */
 float acoshf(float x)
 {
-       union {float f; int32_t i;} u = {.f = x};
+       union {float f; uint32_t i;} u = {x};
+       uint32_t a = u.i & 0x7fffffff;
 
-       if (u.i < 0x3f800000+(1<<23))
-               /* x < 2, invalid if x < 1 or nan */
+       if (a < 0x3f800000+(1<<23))
+               /* |x| < 2, invalid if x < 1 */
                /* up to 2ulp error in [1,1.125] */
                return log1pf(x-1 + sqrtf((x-1)*(x-1)+2*(x-1)));
        if (u.i < 0x3f800000+(12<<23))
-               /* x < 0x1p12 */
+               /* 2 <= x < 0x1p12 */
                return logf(2*x - 1/(x+sqrtf(x*x-1)));
-       /* x >= 0x1p12 */
+       /* x >= 0x1p12 or x <= -2 or nan */
        return logf(x) + 0.693147180559945309417232121458176568f;
 }