1 files changed, 22 insertions, 0 deletions
diff --git a/winsup/cygwin/math/logbl.c b/winsup/cygwin/math/logbl.c
new file mode 100644
index 000000000..310c4457b
--- /dev/null
+++ b/winsup/cygwin/math/logbl.c
@@ -0,0 +1,22 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Changes for long double by Ulrich Drepper <drepper@cygnus.com>
+ * Public domain.
+ */
+
+#include <math.h>
+
+long double
+logbl (long double x)
+{
+  long double res = 0.0L;
+
+  asm ("fxtract\n\t"
+       "fstp	%%st" : "=t" (res) : "0" (x));
+  return res;
+}