1 files changed, 11 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/math/signbitl.c b/winsup/mingw/mingwex/math/signbitl.c
new file mode 100644
index 000000000..78f990350
--- /dev/null
+++ b/winsup/mingw/mingwex/math/signbitl.c
@@ -0,0 +1,11 @@
+#define __FP_SIGNBIT  0x0200
+
+int __signbitl (long double x) {
+  unsigned short sw;
+  __asm__ ("fxam; fstsw %%ax;"
+	   : "=a" (sw)
+	   : "t" (x) );
+  return sw & __FP_SIGNBIT;
+}
+
+int __attribute__ ((alias ("__signbitl"))) signbitl (long double);