From ff0c54c3865b45eff807315262e73d3f01cb19c3 Mon Sep 17 00:00:00 2001
From: CNugteren <web@cedricnugteren.nl>
Date: Sat, 22 Aug 2015 17:11:20 +0200
Subject: Added the XSWAP, XSCAL and XCOPY level-1 routines

---
 src/kernels/level1/xcopy.opencl | 57 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 src/kernels/level1/xcopy.opencl

(limited to 'src/kernels/level1/xcopy.opencl')

diff --git a/src/kernels/level1/xcopy.opencl b/src/kernels/level1/xcopy.opencl
new file mode 100644
index 00000000..97c27ccf
--- /dev/null
+++ b/src/kernels/level1/xcopy.opencl
@@ -0,0 +1,57 @@
+
+// =================================================================================================
+// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
+// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
+// width of 100 characters per line.
+//
+// Author(s):
+//   Cedric Nugteren <www.cedricnugteren.nl>
+//
+// This file contains the Xcopy kernel. It contains one fast vectorized version in case of unit
+// strides (incx=incy=1) and no offsets (offx=offy=0). Another version is more general, but doesn't
+// support vector data-types.
+//
+// This kernel uses the level-1 BLAS common tuning parameters.
+//
+// =================================================================================================
+
+// Enables loading of this file using the C++ pre-processor's #include (C++11 standard raw string
+// literal). Comment-out this line for syntax-highlighting when developing.
+R"(
+
+// =================================================================================================
+
+// Full version of the kernel with offsets and strided accesses
+__attribute__((reqd_work_group_size(WGS, 1, 1)))
+__kernel void Xcopy(const int n,
+                    const __global real* restrict xgm, const int x_offset, const int x_inc,
+                    __global real* ygm, const int y_offset, const int y_inc) {
+
+  // Loops over the work that needs to be done (allows for an arbitrary number of threads)
+  #pragma unroll
+  for (int id = get_global_id(0); id<n; id += get_global_size(0)) {
+    ygm[id*y_inc + y_offset] = xgm[id*x_inc + x_offset];
+  }
+}
+
+// =================================================================================================
+
+// Faster version of the kernel without offsets and strided accesses. Also assumes that 'n' is
+// dividable by 'VW', 'WGS' and 'WPT'.
+__attribute__((reqd_work_group_size(WGS, 1, 1)))
+__kernel void XcopyFast(const int n,
+                        const __global realV* restrict xgm,
+                        __global realV* ygm) {
+  #pragma unroll
+  for (int w=0; w<WPT; ++w) {
+    const int id = w*get_global_size(0) + get_global_id(0);
+    ygm[id] = xgm[id];
+  }
+}
+
+// =================================================================================================
+
+// End of the C++11 raw string literal
+)"
+
+// =================================================================================================
-- 
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