relational: Add isless(floatN) builtin

v2: remove the initial undef

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-by: Aaron Watry <awatry@gmail.com>
llvm-svn: 214567

libclc/generic/include/clc/clc.h

@@ -115,6 +115,7 @@
 #include <clc/relational/isequal.h>
 #include <clc/relational/isgreater.h>
 #include <clc/relational/isgreaterequal.h>
+#include <clc/relational/isless.h>
 #include <clc/relational/isnan.h>
 #include <clc/relational/isnotequal.h>
 #include <clc/relational/select.h>

libclc/generic/include/clc/relational/isless.h

@@ -0,0 +1,7 @@
+#define __CLC_FUNCTION isless
+#define __CLC_BODY <clc/relational/binary_decl.inc>
+
+#include <clc/relational/floatn.inc>
+
+#undef __CLC_BODY
+#undef __CLC_FUNCTION

libclc/generic/lib/SOURCES

@@ -48,6 +48,7 @@ relational/any.cl
 relational/isequal.cl
 relational/isgreater.cl
 relational/isgreaterequal.cl
+relational/isless.cl
 relational/isnan.cl
 relational/isnotequal.cl
 relational/signbit.cl

libclc/generic/lib/relational/isless.cl

@@ -0,0 +1,22 @@
+#include <clc/clc.h>
+#include "relational.h"
+
+//Note: It would be nice to use __builtin_isless with vector inputs, but it seems to only take scalar values as
+//      input, which will produce incorrect output for vector input types.
+
+_CLC_DEFINE_RELATIONAL_BINARY(int, isless, __builtin_isless, float, float)
+
+#ifdef cl_khr_fp64
+
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+// The scalar version of isless(double, double) returns an int, but the vector versions
+// return long.
+
+_CLC_DEF _CLC_OVERLOAD int isless(double x, double y){
+	return __builtin_isless(x, y);
+}
+
+_CLC_DEFINE_RELATIONAL_BINARY_VEC_ALL(long, isless, double, double)
+
+#endif