1 files changed, 15 insertions, 0 deletions
diff --git a/softfloat/s_isSigNaNF64UI.c b/softfloat/s_isSigNaNF64UI.c
new file mode 100755
index 0000000..d255213
--- /dev/null
+++ b/softfloat/s_isSigNaNF64UI.c
@@ -0,0 +1,15 @@
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "specialize.h"
+
+bool softfloat_isSigNaNF64UI( uint_fast64_t ui )
+{
+
+    return
+        ( ( ui>>51 & 0xFFF ) == 0xFFE )
+            && ( ui & UINT64_C( 0x0007FFFFFFFFFFFF ) );
+
+}
+