Merged latest version of the boost 1.63.0 vendor drop

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7593 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2026-06-22 07:38:48 -04:00 · 2017-03-02 02:45:29 +00:00
parent 7454f2fadd
commit ecaa982b9f
3960 changed files with 886568 additions and 510 deletions
@@ -0,0 +1,162 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+// See http://boostorg.github.com/compute for more information.
+//---------------------------------------------------------------------------//
+
+#ifndef BOOST_COMPUTE_ALGORITHM_ADJACENT_FIND_HPP
+#define BOOST_COMPUTE_ALGORITHM_ADJACENT_FIND_HPP
+
+#include <iterator>
+
+#include <boost/compute/command_queue.hpp>
+#include <boost/compute/lambda.hpp>
+#include <boost/compute/system.hpp>
+#include <boost/compute/container/detail/scalar.hpp>
+#include <boost/compute/detail/iterator_range_size.hpp>
+#include <boost/compute/detail/meta_kernel.hpp>
+#include <boost/compute/functional/operator.hpp>
+#include <boost/compute/type_traits/vector_size.hpp>
+
+namespace boost {
+namespace compute {
+namespace detail {
+
+template<class InputIterator, class Compare>
+inline InputIterator
+serial_adjacent_find(InputIterator first,
+                     InputIterator last,
+                     Compare compare,
+                     command_queue &queue)
+{
+    if(first == last){
+        return last;
+    }
+
+    const context &context = queue.get_context();
+
+    detail::scalar<uint_> output(context);
+
+    detail::meta_kernel k("serial_adjacent_find");
+
+    size_t size_arg = k.add_arg<const uint_>("size");
+    size_t output_arg = k.add_arg<uint_ *>(memory_object::global_memory, "output");
+
+    k << k.decl<uint_>("result") << " = size;\n"
+      << "for(uint i = 0; i < size - 1; i++){\n"
+      << "    if(" << compare(first[k.expr<uint_>("i")],
+                              first[k.expr<uint_>("i+1")]) << "){\n"
+      << "        result = i;\n"
+      << "        break;\n"
+      << "    }\n"
+      << "}\n"
+      << "*output = result;\n";
+
+    k.set_arg<const uint_>(
+        size_arg, static_cast<uint_>(detail::iterator_range_size(first, last))
+    );
+    k.set_arg(output_arg, output.get_buffer());
+
+    k.exec_1d(queue, 0, 1, 1);
+
+    return first + output.read(queue);
+}
+
+template<class InputIterator, class Compare>
+inline InputIterator
+adjacent_find_with_atomics(InputIterator first,
+                           InputIterator last,
+                           Compare compare,
+                           command_queue &queue)
+{
+    if(first == last){
+        return last;
+    }
+
+    const context &context = queue.get_context();
+    size_t count = detail::iterator_range_size(first, last);
+
+    // initialize output to the last index
+    detail::scalar<uint_> output(context);
+    output.write(static_cast<uint_>(count), queue);
+
+    detail::meta_kernel k("adjacent_find_with_atomics");
+
+    size_t output_arg = k.add_arg<uint_ *>(memory_object::global_memory, "output");
+
+    k << "const uint i = get_global_id(0);\n"
+      << "if(" << compare(first[k.expr<uint_>("i")],
+                          first[k.expr<uint_>("i+1")]) << "){\n"
+      << "    atomic_min(output, i);\n"
+      << "}\n";
+
+    k.set_arg(output_arg, output.get_buffer());
+
+    k.exec_1d(queue, 0, count - 1, 1);
+
+    return first + output.read(queue);
+}
+
+} // end detail namespace
+
+/// Searches the range [\p first, \p last) for two identical adjacent
+/// elements and returns an iterator pointing to the first.
+///
+/// \param first first element in the range to search
+/// \param last last element in the range to search
+/// \param compare binary comparison function
+/// \param queue command queue to perform the operation
+///
+/// \return \c InputIteratorm to the first element which compares equal
+///         to the following element. If none are equal, returns \c last.
+///
+/// \see find(), adjacent_difference()
+template<class InputIterator, class Compare>
+inline InputIterator
+adjacent_find(InputIterator first,
+              InputIterator last,
+              Compare compare,
+              command_queue &queue = system::default_queue())
+{
+    size_t count = detail::iterator_range_size(first, last);
+    if(count < 32){
+        return detail::serial_adjacent_find(first, last, compare, queue);
+    }
+    else {
+        return detail::adjacent_find_with_atomics(first, last, compare, queue);
+    }
+}
+
+/// \overload
+template<class InputIterator>
+inline InputIterator
+adjacent_find(InputIterator first,
+              InputIterator last,
+              command_queue &queue = system::default_queue())
+{
+    typedef typename std::iterator_traits<InputIterator>::value_type value_type;
+
+    using ::boost::compute::lambda::_1;
+    using ::boost::compute::lambda::_2;
+    using ::boost::compute::lambda::all;
+
+    if(vector_size<value_type>::value == 1){
+        return ::boost::compute::adjacent_find(
+            first, last, _1 == _2, queue
+        );
+    }
+    else {
+        return ::boost::compute::adjacent_find(
+            first, last, all(_1 == _2), queue
+        );
+    }
+}
+
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_ALGORITHM_ADJACENT_FIND_HPP