src/gromacs/gpu_utils/gpu_macros.h

   1 /*
   2  * This file is part of the GROMACS molecular simulation package.
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   4  * Copyright (c) 2014,2015, by the GROMACS development team, led by
   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 /* These macros that let us define inlineable null implementations so
  41    that non-GPU Gromacs can run with no overhead without conditionality
  42    everywhere a GPU function is called. */
  43 #define REAL_FUNC_QUALIFIER
  44 #define REAL_FUNC_ARGUMENT(arg) arg
  45 #define REAL_FUNC_TERM ;
  46 #define REAL_FUNC_TERM_WITH_RETURN(arg) ;
  47
  48 #define NULL_FUNC_QUALIFIER static
  49 #define NULL_FUNC_ARGUMENT(arg) /*arg*/
  50 #define NULL_FUNC_TERM {}
  51 #define NULL_FUNC_TERM_WITH_RETURN(arg) { return (arg); }
  52
  53 #ifdef DOXYGEN
  54
  55 /* Doxygen build appreciates always having argument names, and doesn't
  56  * care about duplicate function definitions. */
  57 #define GPU_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  58 #define GPU_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  59 #define GPU_FUNC_TERM REAL_FUNC_TERM
  60 #define GPU_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  61 #define CUDA_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  62 #define CUDA_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  63 #define CUDA_FUNC_TERM REAL_FUNC_TERM
  64 #define CUDA_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  65 #define OPENCL_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  66 #define OPENCL_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  67 #define OPENCL_FUNC_TERM REAL_FUNC_TERM
  68 #define OPENCL_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  69
  70 #elif GMX_GPU != GMX_GPU_NONE
  71
  72 /* GPU support is enabled, so these functions will have real code
  73  * defined somewhere */
  74 #define GPU_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  75 #define GPU_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  76 #define GPU_FUNC_TERM REAL_FUNC_TERM
  77 #define GPU_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  78
  79 #  if GMX_GPU == GMX_GPU_OPENCL
  80
  81 /* OpenCL support is enabled, so CUDA-specific functions need empty
  82  * implementations, while OpenCL-specific functions will have real
  83  * code defined somewhere. */
  84 #define CUDA_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
  85 #define CUDA_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
  86 #define CUDA_FUNC_TERM NULL_FUNC_TERM
  87 #define CUDA_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
  88 #define OPENCL_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
  89 #define OPENCL_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
  90 #define OPENCL_FUNC_TERM REAL_FUNC_TERM
  91 #define OPENCL_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
  92
  93 #  endif
  94 #  if GMX_GPU == GMX_GPU_CUDA
  95
  96 /* CUDA support is enabled, so OpenCL-specific functions need empty
  97  * implementations, while CUDA-specific functions will have real
  98  * code defined somewhere. */
  99 #define CUDA_FUNC_QUALIFIER REAL_FUNC_QUALIFIER
 100 #define CUDA_FUNC_ARGUMENT REAL_FUNC_ARGUMENT
 101 #define CUDA_FUNC_TERM REAL_FUNC_TERM
 102 #define CUDA_FUNC_TERM_WITH_RETURN(arg) REAL_FUNC_TERM_WITH_RETURN(arg)
 103 #define OPENCL_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
 104 #define OPENCL_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
 105 #define OPENCL_FUNC_TERM NULL_FUNC_TERM
 106 #define OPENCL_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
 107
 108 #  endif
 109
 110 #elif GMX_GPU == GMX_GPU_NONE
 111
 112 /* No GPU support is configured, so none of these functions will have
 113  * real definitions. */
 114 #define GPU_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
 115 #define GPU_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
 116 #define GPU_FUNC_TERM NULL_FUNC_TERM
 117 #define GPU_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
 118 #define CUDA_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
 119 #define CUDA_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
 120 #define CUDA_FUNC_TERM NULL_FUNC_TERM
 121 #define CUDA_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
 122 #define OPENCL_FUNC_QUALIFIER NULL_FUNC_QUALIFIER
 123 #define OPENCL_FUNC_ARGUMENT NULL_FUNC_ARGUMENT
 124 #define OPENCL_FUNC_TERM NULL_FUNC_TERM
 125 #define OPENCL_FUNC_TERM_WITH_RETURN(arg) NULL_FUNC_TERM_WITH_RETURN(arg)
 126
 127 #endif
 128
 129 #endif