Extras/RigidBodyGpuPipeline/opencl/global_atomics/global_atomics.cl

   1
   2
   3
   4
   5 //OpenCL 1.1 has atomic_inc build-in (no extension needed)
   6 //see http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/atomic_inc.html
   7 __kernel void  globalAtomicKernelOpenCL1_1( volatile __global int* counter)
   8 {
   9         atomic_inc(counter);
  10 }
  11
  12 //OpenCL 1.1 atomic device counters extension, usually faster on current AMD hardware
  13 //http://www.khronos.org/registry/cl/extensions/ext/cl_ext_atomic_counters_32.txt
  14 #pragma OPENCL EXTENSION cl_ext_atomic_counters_32 : enable
  15 __kernel void  counterAtomicKernelExt( counter32_t counter)
  16 {
  17         atomic_inc(counter);
  18 }
  19
  20
  21 //OpenCL 1.0 optional extension, using atom_inc
  22 //see http://www.khronos.org/registry/cl/sdk/1.0/docs/man/xhtml/cl_khr_global_int32_base_atomics.html
  23 #pragma OPENCL EXTENSION cl_khr_global_int32_base_atomics : enable //atomic_inc
  24 __kernel void  globalAtomicKernelExt( __global int* counter)
  25 {
  26         atom_inc(counter);
  27 }
  28
  29
  30 __kernel void  globalAtomicKernelCounters32Broken( __global int* counter)
  31 {
  32         (*counter)++;
  33 }
  34