llvm-project/libclc/ptx-nvidiacl/lib/workitem/get_num_groups.cl

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#include <clc/clc.h>
_CLC_DEF size_t get_num_groups(uint dim) {
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switch (dim) {
case 0: return __builtin_ptx_read_nctaid_x();
case 1: return __builtin_ptx_read_nctaid_y();
case 2: return __builtin_ptx_read_nctaid_z();
default: return 0;
}
}