[35] | 1 | #include "NBody.hpp" |
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| 2 | |
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| 3 | extern int numBodies; |
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| 4 | |
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| 5 | /////////////////////////////////// NBody::setupCLKernels Func \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ |
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| 6 | // |
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| 7 | // This function only sets the Kernel arguments |
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| 8 | // |
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| 9 | /////////////////////////////////// NBody::setupCLKernels Func \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ |
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| 10 | |
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| 11 | int NBody::setupCLKernels() |
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| 12 | { |
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| 13 | cl_int status; |
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| 14 | |
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| 15 | /* get a kernel object handle for a kernel with the given name */ |
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| 16 | kernel = clCreateKernel( |
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| 17 | program, |
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| 18 | kernelFunctionName, |
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| 19 | &status); |
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| 20 | |
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| 21 | if(status != CL_SUCCESS) |
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| 22 | { |
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| 23 | std::cout << "clCreateKernel failed." << std::endl; |
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| 24 | return 1; |
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| 25 | } |
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| 26 | |
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| 27 | //================================================ |
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| 28 | // Arguments specific to all kernels: |
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| 29 | |
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| 30 | /*** Set appropriate arguments to the kernel ***/ |
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| 31 | |
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| 32 | /* Particle positions */ |
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| 33 | status = clSetKernelArg( |
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| 34 | kernel, |
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| 35 | 0, // Argument one; |
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| 36 | sizeof(cl_mem), |
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| 37 | (void *)&updatedPos); |
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| 38 | |
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| 39 | if(status != CL_SUCCESS) |
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| 40 | { |
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| 41 | std::cout << "clSetKernelArg failed. (updatedPos)" << std::endl; |
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| 42 | return 1; |
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| 43 | } |
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| 44 | |
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| 45 | /* Particle velocity */ |
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| 46 | status = clSetKernelArg( |
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| 47 | kernel, |
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| 48 | 1, // Argument two; |
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| 49 | sizeof(cl_mem), |
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| 50 | (void *)&updatedVel); |
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| 51 | |
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| 52 | if(status != CL_SUCCESS) |
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| 53 | { |
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| 54 | std::cout << "clSetKernelArg failed. (updatedVel)" << std::endl; |
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| 55 | return 1; |
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| 56 | } |
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| 57 | |
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| 58 | /* numBodies */ |
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| 59 | status = clSetKernelArg( |
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| 60 | kernel, |
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| 61 | 2, // Argument three; |
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| 62 | sizeof(cl_int), |
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| 63 | (void *)&numBodies); |
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| 64 | |
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| 65 | if(status != CL_SUCCESS) |
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| 66 | { |
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| 67 | std::cout << "clSetKernelArg failed. (numBodies)" << std::endl; |
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| 68 | return 1; |
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| 69 | } |
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| 70 | |
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| 71 | /* time step */ |
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| 72 | status = clSetKernelArg( |
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| 73 | kernel, |
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| 74 | 3, // Argument four; |
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| 75 | sizeof(cl_float), |
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| 76 | (void *)&delT); |
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| 77 | if(status != CL_SUCCESS) |
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| 78 | { |
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| 79 | std::cout << "clSetKernelArg failed. (delT)" << std::endl; |
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| 80 | return 1; |
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| 81 | } |
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| 82 | |
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| 83 | /* upward Pseudoprobability */ |
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| 84 | status = clSetKernelArg( |
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| 85 | kernel, |
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| 86 | 4, // Argument five; |
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| 87 | sizeof(cl_float), |
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| 88 | (void *)&espSqr); |
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| 89 | |
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| 90 | if(status != CL_SUCCESS) |
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| 91 | { |
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| 92 | std::cout << "clSetKernelArg failed. (espSqr)" << std::endl; |
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| 93 | return 1; |
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| 94 | } |
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| 95 | |
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| 96 | /* local memory */ |
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| 97 | status = clSetKernelArg( |
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| 98 | kernel, |
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| 99 | 5, // Argument six; |
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| 100 | GROUP_SIZE * 4 * sizeof(float), |
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| 101 | NULL); |
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| 102 | |
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| 103 | if(status != CL_SUCCESS) |
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| 104 | { |
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| 105 | std::cout << "clSetKernelArg failed. (localPos)" << std::endl; |
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| 106 | return 1; |
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| 107 | } |
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| 108 | |
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| 109 | //================================================ |
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| 110 | // Arguments specific to Leapfrog kernel: |
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| 111 | |
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| 112 | if (integrator == LEAPFROG){ |
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| 113 | |
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| 114 | /* local memory */ |
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| 115 | status = clSetKernelArg( |
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| 116 | kernel, |
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| 117 | 6, // Argument seven; |
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| 118 | GROUP_SIZE * 4 * sizeof(float), |
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| 119 | NULL); |
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| 120 | |
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| 121 | if(status != CL_SUCCESS) |
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| 122 | { |
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| 123 | std::cout << "clSetKernelArg failed. (localVel)" << std::endl; |
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| 124 | return 1; |
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| 125 | } |
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| 126 | |
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| 127 | /* Particle acceleration */ |
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| 128 | status = clSetKernelArg( |
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| 129 | kernel, |
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| 130 | 7, // Argument eight; |
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| 131 | sizeof(cl_mem), |
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| 132 | (void *)&updatedAcc); |
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| 133 | |
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| 134 | if(status != CL_SUCCESS) |
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| 135 | { |
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| 136 | std::cout << "clSetKernelArg failed. (updatedAcc)" << std::endl; |
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| 137 | return 1; |
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| 138 | } |
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| 139 | |
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| 140 | /* If it is the first run and we do not have the acc computed yet */ |
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| 141 | status = clSetKernelArg( |
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| 142 | kernel, |
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| 143 | 8, // Argument nine; |
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| 144 | sizeof(cl_int), |
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| 145 | (void *)&initialAccComputation); |
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| 146 | |
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| 147 | if(status != CL_SUCCESS) |
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| 148 | { |
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| 149 | std::cout << "clSetKernelArg failed. (initialAccComputation)" << std::endl; |
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| 150 | return 1; |
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| 151 | } |
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| 152 | |
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| 153 | /* If it is the first run and we do not have the acc computed yet */ |
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| 154 | status = clSetKernelArg( |
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| 155 | kernel, |
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| 156 | 9, // Argument 10; |
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| 157 | sizeof(cl_mem), |
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| 158 | (void *)&updatedCollTime); |
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| 159 | |
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| 160 | if(status != CL_SUCCESS) |
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| 161 | { |
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| 162 | std::cout << "clSetKernelArg failed. (updatedCollTime)" << std::endl; |
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| 163 | return 1; |
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| 164 | } |
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| 165 | } |
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| 166 | |
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| 167 | //================================================ |
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| 168 | // Try to see if there is enough local memory |
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| 169 | // on the device for the above parameter |
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| 170 | // declared to be __local: |
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| 171 | status = clGetKernelWorkGroupInfo(kernel, |
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| 172 | devices[0], |
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| 173 | CL_KERNEL_LOCAL_MEM_SIZE, |
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| 174 | sizeof(cl_ulong), |
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| 175 | &usedLocalMemory, |
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| 176 | NULL); |
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| 177 | if(status != CL_SUCCESS) |
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| 178 | { |
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| 179 | std::cout << "clGetKernelWorkGroupInfo CL_KERNEL_LOCAL_MEM_SIZE failed." << std::endl; |
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| 180 | return 1; |
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| 181 | } |
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| 182 | |
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| 183 | if(usedLocalMemory > totalLocalMemory) |
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| 184 | { |
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| 185 | std::cout << "Unsupported: Insufficient local memory on device." << std::endl; |
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| 186 | return 1; |
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| 187 | } |
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| 188 | |
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| 189 | return 0; |
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| 190 | } |
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