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50 lines
1.5 KiB
Markdown
50 lines
1.5 KiB
Markdown
Introduction
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============
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This sample demonstrates linking a libnvvm-generated module with an existing
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CUDA C library. The LLVM C++ API is used to generate an LLVM IR module that
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conforms to the NVVM IR specification and contains a call to an externally-
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defined function, and this module is compiled to PTX with libnvvm. The JIT
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linker (part of the CUDA Driver API) is then used to assemble the PTX and link
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it with the math library, creating a linked CUBIN image. This image is then
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executed on the first CUDA device on the system.
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Files
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-----
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- cuda-c-linking.cpp - Main source file demonstrating the generated of a
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PTX file using libnvvm and linking it with a CUDA C
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device library
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- math-funcs - CUDA C device library source file
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- CMakeLists.txt - CMake build script
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Building
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--------
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This sample is optionally built as part of the libnvvm samples from the CUDA
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samples tree. Please see the README file at the root of the libnvvm samples
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for build instructions.
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Usage
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-----
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Once built, the sample can be executed by running the "cuda-c-linking" binary.
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Linux:
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$ cd $SAMPLES_INSTALL_DIR
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$ ./cuda-c-linking
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Windows:
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$ cd %SAMPLES_INSTALL_DIR%
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$ cuda-c-linking.exe
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For inspection purposes, the following command-line options are available:
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- -save-ptx - Write generated PTX kernel to cuda-c-linking.kernel.ptx
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- -save-ir - Write generated LLVM IR to cuda-c-linking.kernel.ll
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- -save-cubin - Write linked CUBIN image to cuda-c-linking.linked.cubin
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