src/gromacs/gpu_utils/gpu_macros.h

   1 /*
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   5  * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
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   7  * top-level source directory and at http://www.gromacs.org.
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  35 #ifndef GMX_GPU_UTILS_MACROS_H
  36 #define GMX_GPU_UTILS_MACROS_H
  37
  38 #include "config.h"
  39
  40 #include "gromacs/utility/basedefinitions.h" // for gmx_unused
  41
  42 /* These macros that let us define inlineable null implementations so
  43    that non-GPU Gromacs can run with no overhead without conditionality
  44    everywhere a GPU function is called. */
  45 #define REAL_FUNC_QUALIFIER
  46 #define REAL_FUNC_ARGUMENT(arg) arg
  47 #define REAL_FUNC_TERM
  48 #define REAL_FUNC_TERM_WITH_RETURN(arg)
  49
  50 #define NULL_FUNC_QUALIFIER gmx_unused static
  51 #define NULL_FUNC_ARGUMENT(arg) arg gmx_unused
  52 #define NULL_FUNC_TERM \
  53     {                  \
  54     }
  55 #define NULL_FUNC_TERM_WITH_RETURN(arg) \
  56     {                                   \
  57         return (arg);                   \
  58     }
  59
  60 #ifdef DOXYGEN
  61
  62 /* Doxygen build appreciates always having argument names, and doesn't
  63  * care about duplicate function definitions. */
  64 #    define GPU_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  65 #    define GPU_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  66 #    define GPU_FUNC_TERM REAL_FUNC_TERM
  67 #    define GPU_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  68 #    define CUDA_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  69 #    define CUDA_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  70 #    define CUDA_FUNC_TERM REAL_FUNC_TERM
  71 #    define CUDA_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  72 #    define OPENCL_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  73 #    define OPENCL_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  74 #    define OPENCL_FUNC_TERM REAL_FUNC_TERM
  75 #    define OPENCL_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  76
  77 #elif GMX_GPU_OPENCL || GMX_GPU_CUDA
  78
  79 /* GPU support is enabled, so these functions will have real code
  80  * defined somewhere */
  81 #    define GPU_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  82 #    define GPU_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  83 #    define GPU_FUNC_TERM REAL_FUNC_TERM
  84 #    define GPU_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  85
  86 #    if GMX_GPU_OPENCL
  87
  88 /* OpenCL support is enabled, so CUDA-specific functions need empty
  89  * implementations, while OpenCL-specific functions will have real
  90  * code defined somewhere. */
  91 #        define CUDA_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
  92 #        define CUDA_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
  93 #        define CUDA_FUNC_TERM NULL_FUNC_TERM
  94 #        define CUDA_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
  95 #        define OPENCL_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  96 #        define OPENCL_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  97 #        define OPENCL_FUNC_TERM REAL_FUNC_TERM
  98 #        define OPENCL_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  99
 100 #    endif
 101 #    if GMX_GPU_CUDA
 102
 103 /* CUDA support is enabled, so OpenCL-specific functions need empty
 104  * implementations, while CUDA-specific functions will have real
 105  * code defined somewhere. */
 106 #        define CUDA_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
 107 #        define CUDA_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
 108 #        define CUDA_FUNC_TERM REAL_FUNC_TERM
 109 #        define CUDA_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
 110 #        define OPENCL_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
 111 #        define OPENCL_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
 112 #        define OPENCL_FUNC_TERM NULL_FUNC_TERM
 113 #        define OPENCL_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
 114
 115 #    endif
 116
 117 #elif !GMX_GPU || GMX_GPU_SYCL
 118
 119 /* No GPU support is configured, so none of these functions will have
 120  * real definitions. */
 121 #    define GPU_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
 122 #    define GPU_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
 123 #    define GPU_FUNC_TERM NULL_FUNC_TERM
 124 #    define GPU_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
 125 #    define CUDA_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
 126 #    define CUDA_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
 127 #    define CUDA_FUNC_TERM NULL_FUNC_TERM
 128 #    define CUDA_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
 129 #    define OPENCL_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
 130 #    define OPENCL_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
 131 #    define OPENCL_FUNC_TERM NULL_FUNC_TERM
 132 #    define OPENCL_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
 133
 134 #endif
 135
 136 #endif