1 files changed, 17 insertions, 0 deletions
diff --git a/libclc/generic/lib/relational/isnan.cl b/libclc/generic/lib/relational/isnan.cl
new file mode 100644
index 00000000000..1a64f67dbd2
--- /dev/null
+++ b/libclc/generic/lib/relational/isnan.cl
@@ -0,0 +1,17 @@
+#include <clc/clc.h>
+
+_CLC_DEFINE_UNARY_BUILTIN(int, isnan, __builtin_isnan, float)
+
+#ifdef cl_khr_fp64
+
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+// The scalar version of isnan(double) returns an int, but the vector versions
+// return long.
+_CLC_DEF _CLC_OVERLOAD int isnan(double x) {
+  return __builtin_isnan(x);
+}
+
+_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, long, isnan, double)
+
+#endif