Revert "[SYCL] Implement sub_group_mask version 2 (intel#11195)" (int…

…el#12239)

This reverts commit 3bd09b9.

Reverting as it affects performance. Will re-introduce later.

sycl/include/sycl/ext/oneapi/experimental/tangle_group.hpp

@@ -153,7 +153,9 @@ get_tangle_group(Group group) {
   // TODO: Construct from compiler-generated mask. Return an invalid group in
   //       in the meantime. CUDA devices will report false for the tangle_group
   //       support aspect so kernels launch should ensure this is never run.
-  return tangle_group<sycl::sub_group>(0);
+  return tangle_group<sycl::sub_group>(
+      sycl::detail::Builder::createSubGroupMask<
+          sycl::ext::oneapi::sub_group_mask>(0, 0));
 #endif
 #else
   throw runtime_error("Non-uniform groups are not supported on host device.",

sycl/include/sycl/ext/oneapi/sub_group_mask.hpp

@@ -9,8 +9,8 @@
 
 #include <sycl/detail/helpers.hpp>     // for Builder
 #include <sycl/detail/memcpy.hpp>      // detail::memcpy
+#include <sycl/detail/type_traits.hpp> // for is_sub_group
 #include <sycl/exception.hpp>          // for errc, exception
-#include <sycl/feature_test.hpp>       // for SYCL_EXT_ONEAPI_SUB_GROUP_MASK
 #include <sycl/id.hpp>                 // for id
 #include <sycl/marray.hpp>             // for marray
 #include <sycl/types.hpp>              // for vec
@@ -35,26 +35,25 @@ template <typename Group> struct group_scope;
 
 } // namespace detail
 
-// forward decalre sycl::sub_group
-struct sub_group;
-
 namespace ext::oneapi {
 
-// forward decalre sycl::ext::oneapi::sub_group
-struct sub_group;
+#if defined(__SYCL_DEVICE_ONLY__) && defined(__AMDGCN__) &&                    \
+    (__AMDGCN_WAVEFRONT_SIZE == 64)
+#define BITS_TYPE uint64_t
+#else
+#define BITS_TYPE uint32_t
+#endif
 
 // defining `group_ballot` here to make predicate default `true`
 // need to forward declare sub_group_mask first
 struct sub_group_mask;
 template <typename Group>
-std::enable_if_t<std::is_same_v<std::decay_t<Group>, sub_group> ||
-                     std::is_same_v<std::decay_t<Group>, sycl::sub_group>,
-                 sub_group_mask>
+std::enable_if_t<sycl::detail::is_sub_group<Group>::value, sub_group_mask>
 group_ballot(Group g, bool predicate = true);
 
 struct sub_group_mask {
   friend class sycl::detail::Builder;
-  using BitsType = uint64_t;
+  using BitsType = BITS_TYPE;
 
   static constexpr size_t max_bits =
       sizeof(BitsType) * CHAR_BIT /* implementation-defined */;
@@ -82,8 +81,7 @@ struct sub_group_mask {
     }
 
     reference(sub_group_mask &gmask, size_t pos) : Ref(gmask.Bits) {
-      BitsType one = 1;
-      RefBit = (pos < gmask.bits_num) ? (one << pos) : 0;
+      RefBit = (pos < gmask.bits_num) ? (1UL << pos) : 0;
     }
 
   private:
@@ -93,36 +91,8 @@ struct sub_group_mask {
     BitsType RefBit;
   };
 
-#if SYCL_EXT_ONEAPI_SUB_GROUP_MASK >= 2
-  sub_group_mask() : sub_group_mask(0, GetMaxLocalRangeSize()){};
-
-  sub_group_mask(unsigned long long val)
-      : sub_group_mask(0, GetMaxLocalRangeSize()) {
-    Bits = val;
-  };
-
-  template <typename T, std::size_t K,
-            typename = std::enable_if_t<std::is_integral_v<T>>>
-  sub_group_mask(const sycl::marray<T, K> &val)
-      : sub_group_mask(0, GetMaxLocalRangeSize()) {
-    for (size_t I = 0, BytesCopied = 0; I < K && BytesCopied < sizeof(Bits);
-         ++I) {
-      size_t RemainingBytes = sizeof(Bits) - BytesCopied;
-      size_t BytesToCopy =
-          RemainingBytes < sizeof(T) ? RemainingBytes : sizeof(T);
-      sycl::detail::memcpy(reinterpret_cast<char *>(&Bits) + BytesCopied,
-                           &val[I], BytesToCopy);
-      BytesCopied += BytesToCopy;
-    }
-  }
-
-  sub_group_mask(const sub_group_mask &other) = default;
-  sub_group_mask &operator=(const sub_group_mask &other) = default;
-#endif // SYCL_EXT_ONEAPI_SUB_GROUP_MASK
-
   bool operator[](id<1> id) const {
-    BitsType one = 1;
-    return (Bits & ((id.get(0) < bits_num) ? (one << id.get(0)) : 0));
+    return (Bits & ((id.get(0) < bits_num) ? (1UL << id.get(0)) : 0));
   }
 
   reference operator[](id<1> id) { return {*this, id.get(0)}; }
@@ -284,6 +254,10 @@ struct sub_group_mask {
     return Tmp;
   }
 
+  sub_group_mask(const sub_group_mask &rhs) = default;
+
+  sub_group_mask &operator=(const sub_group_mask &rhs) = default;
+
   template <typename Group>
   friend std::enable_if_t<std::is_same_v<std::decay_t<Group>, sub_group>,
                           sub_group_mask>
@@ -311,14 +285,6 @@ struct sub_group_mask {
   }
 
 private:
-  static size_t GetMaxLocalRangeSize() {
-#ifdef __SYCL_DEVICE_ONLY__
-    return __spirv_SubgroupMaxSize();
-#else
-    return max_bits;
-#endif
-  }
-
   sub_group_mask(BitsType rhs, size_t bn)
       : Bits(rhs & valuable_bits(bn)), bits_num(bn) {
     assert(bits_num <= max_bits);
@@ -336,17 +302,15 @@ struct sub_group_mask {
 };
 
 template <typename Group>
-std::enable_if_t<std::is_same_v<std::decay_t<Group>, sub_group> ||
-                     std::is_same_v<std::decay_t<Group>, sycl::sub_group>,
-                 sub_group_mask>
+std::enable_if_t<sycl::detail::is_sub_group<Group>::value, sub_group_mask>
 group_ballot(Group g, bool predicate) {
   (void)g;
 #ifdef __SYCL_DEVICE_ONLY__
   auto res = __spirv_GroupNonUniformBallot(
       sycl::detail::spirv::group_scope<Group>::value, predicate);
-  sub_group_mask::BitsType val = res[0];
-  if constexpr (sizeof(sub_group_mask::BitsType) == 8)
-    val |= ((sub_group_mask::BitsType)res[1]) << 32;
+  BITS_TYPE val = res[0];
+  if constexpr (sizeof(BITS_TYPE) == 8)
+    val |= ((BITS_TYPE)res[1]) << 32;
   return sycl::detail::Builder::createSubGroupMask<sub_group_mask>(
       val, g.get_max_local_range()[0]);
 #else
@@ -356,6 +320,8 @@ group_ballot(Group g, bool predicate) {
 #endif
 }
 
+#undef BITS_TYPE
+
 } // namespace ext::oneapi
 } // namespace _V1
 } // namespace sycl

sycl/include/syclcompat/memory.hpp

@@ -42,7 +42,6 @@
 #include <utility>
 
 #include <sycl/builtins.hpp>
-#include <sycl/ext/intel/experimental/usm_properties.hpp>
 #include <sycl/ext/oneapi/group_local_memory.hpp>
 #include <sycl/usm.hpp>
 

sycl/source/feature_test.hpp.in

@@ -31,7 +31,7 @@ inline namespace _V1 {
 // TODO: Move these feature-test macros to compiler driver.
 #define SYCL_EXT_INTEL_DEVICE_INFO 6
 #define SYCL_EXT_ONEAPI_DEVICE_ARCHITECTURE 1
-#define SYCL_EXT_ONEAPI_SUB_GROUP_MASK 2
+#define SYCL_EXT_ONEAPI_SUB_GROUP_MASK 1
 #define SYCL_EXT_ONEAPI_LOCAL_MEMORY 1
 #define SYCL_EXT_ONEAPI_MATRIX 1
 #define SYCL_EXT_ONEAPI_ASSERT 1

sycl/test/extensions/macro.cpp

@@ -9,7 +9,7 @@ constexpr bool backend_opencl_macro_defined = true;
 constexpr bool backend_opencl_macro_defined = false;
 #endif
 
-#ifdef SYCL_EXT_ONEAPI_SUB_GROUP_MASK
+#if SYCL_EXT_ONEAPI_SUB_GROUP_MASK == 1
 constexpr bool sub_group_mask_macro_defined = true;
 #else
 constexpr bool sub_group_mask_macro_defined = false;

sycl/test/extensions/sub_group_mask.cpp

@@ -1,7 +1,8 @@
 // RUN: %clangxx -fsycl -fsycl-device-only -fsyntax-only %s
 //
 // This test is intended to check sycl::ext::oneapi::sub_group_mask interface.
-// test for spec ver.2: sycl/test-e2e/SubGroupMask/sub_group_mask_ver2.cpp
+// There is a work in progress update to the spec: intel/llvm#8174
+// TODO: udpate this test once revision 2 of the extension is supported
 
 #include <sycl/sycl.hpp>