Automerge: [libclc] Mov erf & erfc to CLC library (#140524)

This completes the set of maths builtins.

No attempt to vectorize or optimize this code. The implementation is
licensed to SunPro so will probably need to be replaced at some point in
the future anyway. Calls to other builtins have been replaced with the
CLC equivalents, and some bit-hacking was replaced with the fabs
builtin.

Author: frasercrmck

libclc/clc/include/clc/math/clc_erf.h

@@ -0,0 +1,19 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __CLC_MATH_CLC_ERF_H__
+#define __CLC_MATH_CLC_ERF_H__
+
+#define __CLC_BODY <clc/math/unary_decl.inc>
+#define __CLC_FUNCTION __clc_erf
+
+#include <clc/math/gentype.inc>
+
+#undef __CLC_FUNCTION
+
+#endif // __CLC_MATH_CLC_ERF_H__

libclc/clc/include/clc/math/clc_erfc.h

@@ -0,0 +1,19 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __CLC_MATH_CLC_ERFC_H__
+#define __CLC_MATH_CLC_ERFC_H__
+
+#define __CLC_BODY <clc/math/unary_decl.inc>
+#define __CLC_FUNCTION __clc_erfc
+
+#include <clc/math/gentype.inc>
+
+#undef __CLC_FUNCTION
+
+#endif // __CLC_MATH_CLC_ERFC_H__

libclc/clc/lib/generic/SOURCES

@@ -41,6 +41,8 @@ math/clc_cos.cl
 math/clc_cosh.cl
 math/clc_cospi.cl
 math/clc_ep_log.cl
+math/clc_erf.cl
+math/clc_erfc.cl
 math/clc_exp.cl
 math/clc_exp10.cl
 math/clc_exp2.cl