1 files changed, 18 insertions, 0 deletions
diff --git a/libm/e_acosh.c b/libm/e_acosh.c
index 2c70ad7c8..219b3d64e 100644
--- a/libm/e_acosh.c
+++ b/libm/e_acosh.c
@@ -53,3 +53,21 @@ double attribute_hidden __ieee754_acosh(double x)
 	    return log1p(t+sqrt(2.0*t+t*t));
 	}
 }
+
+/*
+ * wrapper acosh(x)
+ */
+#ifndef _IEEE_LIBM
+double acosh(double x)
+{
+	double z = __ieee754_acosh(x);
+	if (_LIB_VERSION == _IEEE_ || isnan(x))
+		return z;
+	if (x < 1.0)
+		return __kernel_standard(x, x, 29); /* acosh(x<1) */
+	return z;
+}
+#else
+strong_alias(__ieee754_acosh, acosh)
+#endif
+libm_hidden_def(acosh)