/*! * Copyright (c) 2017 by Contributors * \file External random functions for tensor. */ #include <tvm/runtime/registry.h> #include <tvm/runtime/util.h> #include <dmlc/logging.h> #include <dmlc/thread_local.h> #include <algorithm> #ifndef _LIBCPP_SGX_CONFIG #include "./mt_random_engine.cc" #else #include "./sgx_random_engine.cc" #endif #define DLPACK_INTEGER_TYPE_SWITCH(type, DType, ...) \ if (type.code == kDLInt && type.bits == 32) { \ typedef int32_t DType; \ {__VA_ARGS__} \ } else if (type.code == kDLInt && type.bits == 16) { \ typedef int16_t DType; \ {__VA_ARGS__} \ } else if (type.code == kDLInt && type.bits == 8) { \ typedef int8_t DType; \ {__VA_ARGS__} \ } else if (type.code == kDLUInt && type.bits == 32) { \ typedef uint32_t DType; \ {__VA_ARGS__} \ } else if (type.code == kDLUInt && type.bits == 16) { \ typedef uint16_t DType; \ {__VA_ARGS__} \ } else if (type.code == kDLUInt && type.bits == 8) { \ typedef uint8_t DType; \ {__VA_ARGS__} \ } else { \ LOG(FATAL) << "unknown data type"; \ } namespace tvm { namespace contrib { using namespace runtime; struct RandomThreadLocalEntry { RandomEngine random_engine; static RandomThreadLocalEntry* ThreadLocal(); }; typedef dmlc::ThreadLocalStore<RandomThreadLocalEntry> RandomThreadLocalStore; RandomThreadLocalEntry* RandomThreadLocalEntry::ThreadLocal() { return RandomThreadLocalStore::Get(); } TVM_REGISTER_GLOBAL("tvm.contrib.random.randint") .set_body([](TVMArgs args, TVMRetValue *ret) { RandomThreadLocalEntry *entry = RandomThreadLocalEntry::ThreadLocal(); int64_t low = args[0]; int64_t high = args[1]; DLTensor* out = args[2]; CHECK_GT(high, low) << "high must be bigger than low"; CHECK(out->strides == nullptr); DLDataType dtype = out->dtype; int64_t size = 1; for (int i = 0; i < out->ndim; ++i) { size *= out->shape[i]; } DLPACK_INTEGER_TYPE_SWITCH(dtype, DType, { int64_t numeric_low = std::numeric_limits<DType>::min(); int64_t numeric_high = std::numeric_limits<DType>::max(); numeric_high += 1; // exclusive upper bound low = std::max(low, numeric_low); high = std::min(high, numeric_high); if (out->ctx.device_type == kDLCPU) { // file the data with random byte std::generate_n(static_cast<DType*>(out->data), size, [&] () { unsigned rint = entry->random_engine.GetRandInt(); return low + rint % (high - low); }); } else { LOG(FATAL) << "Do not support random.randint on this device yet"; } }) }); TVM_REGISTER_GLOBAL("tvm.contrib.random.uniform") .set_body([](TVMArgs args, TVMRetValue *ret) { RandomThreadLocalEntry *entry = RandomThreadLocalEntry::ThreadLocal(); double low = args[0]; double high = args[1]; DLTensor* out = args[2]; entry->random_engine.SampleUniform(out, low, high); }); } // namespace contrib } // namespace tvm