diff options
Diffstat (limited to 'gcc/ada/gnat_cuda.ads')
| -rw-r--r-- | gcc/ada/gnat_cuda.ads | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/gcc/ada/gnat_cuda.ads b/gcc/ada/gnat_cuda.ads index e756162fa01..1333a6570ec 100644 --- a/gcc/ada/gnat_cuda.ads +++ b/gcc/ada/gnat_cuda.ads @@ -43,14 +43,13 @@ -- compiling for the host, the frontend stores procedures marked with -- CUDA_Global in a hash table the key of which is the Node_Id of the package -- body that contains the CUDA_Global procedure. This is done in sem_prag.adb. --- Once the declarations of a package body have been analyzed, variable, type --- and procedure declarations necessary for the initialization of the CUDA --- runtime are appended to the package that contains the CUDA_Global --- procedure. --- --- These declarations are used to register the CUDA kernel with the CUDA --- runtime when the program is launched. Registering a CUDA kernel with the --- CUDA runtime requires multiple function calls: +-- When emitting an ALI file for a compilation unit, the frontend emits 'K' +-- lines for each visible CUDA kernel (see Output_CUDA_Symbols in +-- lib-writ.adb). This allows the binder to see all kernels in a program and +-- emit code to register the kernels with the CUDA runtime. + +-- Registering a CUDA kernel with the CUDA runtime requires multiple function +-- calls: -- - The first one registers the fat binary which corresponds to the package -- with the CUDA runtime. -- - Then, as many function calls as there are kernels in order to bind them @@ -58,9 +57,7 @@ -- fat binary. -- - The last call lets the CUDA runtime know that we are done initializing -- CUDA. --- Expansion of the CUDA_Global aspect is triggered in sem_ch7.adb, during --- analysis of the package. All of this expansion is performed in the --- Insert_CUDA_Initialization procedure defined in GNAT_CUDA. +-- All of that is performed by the code emitted by bindgen.adb. -- -- Once a CUDA package is initialized, its kernels are ready to be used. -- Launching CUDA kernels is done by using the CUDA_Execute pragma. When @@ -87,8 +84,6 @@ package GNAT_CUDA is procedure Expand_CUDA_Package (N : Node_Id); -- When compiling for the host: - -- - Generate code to register kernels with the CUDA runtime and - -- post-process kernels. -- - Empty content of CUDA_Global procedures. -- - Remove declarations of CUDA_Device entities. |