Merge pull request #350 from ComputationalRadiationPhysics/topic-TBB-readme

Update Readme to include TBB

Author: ax3l

README.md

@@ -54,6 +54,7 @@ Accelerator Back-ends
 |OpenMP 4.0+ (CPU)|OpenMP 4.0+|Host CPU (multi core)|parallel (undefined)|parallel (preemptive multitasking)|
 | std::thread | std::thread |Host CPU (multi core)|sequential|parallel (preemptive multitasking)|
 | Boost.Fiber | boost::fibers::fiber |Host CPU (single core)|sequential|parallel (cooperative multitasking)|
+|TBB 2.2+ blocks|TBB 2.2+|Host CPU (multi core)|parallel (preemptive multitasking)|sequential (only 1 thread per block)|
 |CUDA 7.0+|CUDA 7.0+|NVIDIA GPUs SM 2.0+|parallel (undefined)|parallel (lock-step within warps)|
 
 
@@ -70,6 +71,7 @@ This library uses C++11 (or newer when available).
 |OpenMP 4.0+ (CPU)|:white_check_mark:|:white_check_mark:|:white_check_mark:|:x:|:x:|:x:|:x:|:x:|
 | std::thread |:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|
 | Boost.Fiber |:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|
+|TBB 2.2+|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|:white_check_mark:|
 |CUDA 7.0+|:white_check_mark: (nvcc 7.0+)|:white_check_mark: (nvcc 8.0+)|:x:|:x:|:x:|:white_check_mark: (native/nvcc 8.0+)|:white_check_mark: (native)|:x:|
 
 
@@ -89,6 +91,8 @@ When an accelerator back-end using *CUDA* is enabled, version *7.0* of the *CUDA
 
 When an accelerator back-end using *OpenMP* is enabled, the compiler and the platform have to support the corresponding minimum *OpenMP* version.
 
+When an accelerator back-end using *TBB* is enabled, the compiler and the platform have to support the corresponding minimum *TBB* version.
+
 
 Usage
 -----