1 files changed, 17 insertions, 0 deletions
diff --git a/libquadmath/math/isinfq.c b/libquadmath/math/isinfq.c
new file mode 100644
index 000000000..46996b54c
--- /dev/null
+++ b/libquadmath/math/isinfq.c
@@ -0,0 +1,17 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Change for long double by Jakub Jelinek <jj@ultra.linux.cz>
+ * Public domain.
+ */
+
+#include "quadmath-imp.h"
+
+int
+isinfq (__float128 x)
+{
+  int64_t hx,lx;
+  GET_FLT128_WORDS64(hx,lx,x);
+  lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
+  lx |= -lx;
+  return ~(lx >> 63) & (hx >> 62);
+}