[libclc] Move several integer functions to CLC library

This commit moves over the OpenCL clz, hadd, mad24, mad_hi, mul24,
mul_hi, popcount, rhadd, and upsample builtins to the CLC library. There
are no changes to any target's CLC libraries.

The OpenCL mad_hi builtin wasn't previously publicly available from the
CLC libraries, as it was hash-defined to mul_hi in the header files.
That issue has been fixed, and mad_hi is now exposed.

The custom AMD implementation/workaround for popcount has been removed
as it was only valid for clang < 7.

There are still two integer functions which haven't been moved over. The
OpenCL add_sat, sub_sat, and mad_sat builtins require saturating
conversion builtins which haven't yet been ported.

Author: frasercrmck

libclc/amdgcn/lib/SOURCES

@@ -1,5 +1,4 @@
 cl_khr_int64_extended_atomics/minmax_helpers.ll
-integer/popcount.cl
 math/fmax.cl
 math/fmin.cl
 math/ldexp.cl

libclc/amdgcn/lib/integer/popcount.cl

@@ -0,0 +1,2 @@
+_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE FUNCTION(__CLC_GENTYPE x,
+                                               __CLC_GENTYPE y);

libclc/amdgcn/lib/integer/popcount.inc

@@ -0,0 +1,21 @@
+#ifndef __CLC_INTEGER_CLC_CLZ_H__
+#define __CLC_INTEGER_CLC_CLZ_H__
+
+#if defined(CLC_CLSPV) || defined(CLC_SPIRV)
+// clspv and spir-v targets provide their own OpenCL-compatible clz
+#define __clc_clz clz
+#else
+
+#include <clc/clcfunc.h>
+#include <clc/clctypes.h>
+
+#define FUNCTION __clc_clz
+#define __CLC_BODY "unary_decl.h"
+
+#include <clc/integer/gentype.inc>
+
+#undef FUNCTION
+
+#endif
+
+#endif // __CLC_INTEGER_CLC_CLZ_H__

libclc/clc/include/clc/integer/binary_decl.h

@@ -0,0 +1,21 @@
+#ifndef __CLC_INTEGER_CLC_HADD_H__
+#define __CLC_INTEGER_CLC_HADD_H__
+
+#if defined(CLC_CLSPV) || defined(CLC_SPIRV)
+// clspv and spir-v targets provide their own OpenCL-compatible hadd
+#define __clc_hadd hadd
+#else
+
+#include <clc/clcfunc.h>
+#include <clc/clctypes.h>
+
+#define FUNCTION __clc_hadd
+#define __CLC_BODY "binary_decl.h"
+
+#include <clc/integer/gentype.inc>
+
+#undef FUNCTION
+
+#endif
+
+#endif // __CLC_INTEGER_CLC_HADD_H__

libclc/clc/include/clc/integer/clc_clz.h

@@ -0,0 +1,21 @@
+#ifndef __CLC_INTEGER_CLC_MAD24_H__
+#define __CLC_INTEGER_CLC_MAD24_H__
+
+#if defined(CLC_CLSPV) || defined(CLC_SPIRV)
+// clspv and spir-v targets provide their own OpenCL-compatible mad24
+#define __clc_mad24 mad24
+#else
+
+#include <clc/clcfunc.h>
+#include <clc/clctypes.h>
+
+#define FUNCTION __clc_mad24
+#define __CLC_BODY "ternary_decl.h"
+
+#include <clc/integer/gentype24.inc>
+
+#undef FUNCTION
+
+#endif
+
+#endif // __CLC_INTEGER_CLC_MAD24_H__

libclc/clc/include/clc/integer/clc_hadd.h

@@ -0,0 +1,8 @@
+#ifndef __CLC_INTEGER_CLC_MAD_HI_H__
+#define __CLC_INTEGER_CLC_MAD_HI_H__
+
+#include <clc/integer/clc_mul_hi.h>
+
+#define __clc_mad_hi(a, b, c) (__clc_mul_hi((a), (b)) + (c))
+
+#endif // __CLC_INTEGER_CLC_MAD_HI_H__

libclc/clc/include/clc/integer/clc_mad24.h

@@ -0,0 +1,21 @@
+#ifndef __CLC_INTEGER_CLC_MUL24_H__
+#define __CLC_INTEGER_CLC_MUL24_H__
+
+#if defined(CLC_CLSPV) || defined(CLC_SPIRV)
+// clspv and spir-v targets provide their own OpenCL-compatible mul24
+#define __clc_mul24 mul24
+#else
+
+#include <clc/clcfunc.h>
+#include <clc/clctypes.h>
+
+#define FUNCTION __clc_mul24
+#define __CLC_BODY "binary_decl.h"
+
+#include <clc/integer/gentype24.inc>
+
+#undef FUNCTION
+
+#endif
+
+#endif // __CLC_INTEGER_CLC_MUL24_H__

libclc/clc/include/clc/integer/clc_mad_hi.h

@@ -0,0 +1,21 @@
+#ifndef __CLC_INTEGER_CLC_MUL_HI_H__
+#define __CLC_INTEGER_CLC_MUL_HI_H__
+
+#if defined(CLC_CLSPV) || defined(CLC_SPIRV)
+// clspv and spir-v targets provide their own OpenCL-compatible mul_hi
+#define __clc_mul_hi mul_hi
+#else
+
+#include <clc/clcfunc.h>
+#include <clc/clctypes.h>
+
+#define FUNCTION __clc_mul_hi
+#define __CLC_BODY "binary_decl.h"
+
+#include <clc/integer/gentype.inc>
+
+#undef FUNCTION
+
+#endif
+
+#endif // __CLC_INTEGER_CLC_MUL_HI_H__