e537c83975
This patch adds the `rpc_host_call` function as a GPU extension. This is exported from the `libc` project to use the RPC interface to call a function pointer via RPC any copying the arguments by-value. The interface can only support a single void pointer argument much like pthreads. The function call here is the bare-bones version of what's required for OpenMP reverse offloading. Full support will require interfacing with the mapping table, nowait support, etc. I decided to test this interface in `libomptarget` as that will be the primary consumer and it would be more difficult to make a test in `libc` due to the testing infrastructure not really having a concept of the "host" as it runs directly on the GPU as if it were a CPU target. Reviewed By: jplehr Differential Revision: https://reviews.llvm.org/D155003
24 lines
524 B
TableGen
24 lines
524 B
TableGen
def GPUExtensions : StandardSpec<"GPUExtensions"> {
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HeaderSpec RPC = HeaderSpec<
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"gpu/rpc.h",
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[], // Macros
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[], // Types
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[], // Enumerations
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[
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FunctionSpec<
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"rpc_reset",
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RetValSpec<VoidType>,
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[ArgSpec<UnsignedIntType>, ArgSpec<VoidPtr>]
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>,
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FunctionSpec<
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"rpc_host_call",
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RetValSpec<VoidType>,
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[ArgSpec<VoidPtr>, ArgSpec<VoidPtr>, ArgSpec<SizeTType>]
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>,
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]
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>;
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let Headers = [
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RPC,
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];
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}
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