From: Anatol Belski <ab@php.net>
Date: Mon, 1 Sep 2014 11:51:58 +0000 (+0200)
Subject: fix asinh() on win64 for big negative values
X-Git-Tag: PRE_PHP7_REMOVALS~175
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3aa5583cab35f94dc6847c01b4e9838e1969faa9;p=php

fix asinh() on win64 for big negative values
---

diff --git a/ext/standard/math.c b/ext/standard/math.c
index a1dda23eda..665822c035 100644
--- a/ext/standard/math.c
+++ b/ext/standard/math.c
@@ -219,7 +219,16 @@ static double php_asinh(double z)
 #ifdef HAVE_ASINH
 	return(asinh(z));
 #else
+# ifdef _WIN64
+	if (z > 0) {
+		return log(z + sqrt(z * z + 1));
+	}
+	else {
+		return -log(-z + sqrt(z * z + 1));
+	}
+# else
 	return(log(z + sqrt(1 + pow(z, 2))) / log(M_E));
+# endif
 #endif
 }
 /* }}} */