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Subject [GitHub] [incubator-tvm] FrozenGene commented on a change in pull request #5252: [RUNTIME] Initial implementation of Hexagon runtime support
Date Wed, 08 Apr 2020 10:12:47 GMT
FrozenGene commented on a change in pull request #5252: [RUNTIME] Initial implementation of
Hexagon runtime support
URL: https://github.com/apache/incubator-tvm/pull/5252#discussion_r405397816
 
 

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 File path: src/runtime/hexagon/README.md
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 @@ -0,0 +1,76 @@
+<!--- Licensed to the Apache Software Foundation (ASF) under one -->
+<!--- or more contributor license agreements.  See the NOTICE file -->
+<!--- distributed with this work for additional information -->
+<!--- regarding copyright ownership.  The ASF licenses this file -->
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+
+<!---   http://www.apache.org/licenses/LICENSE-2.0 -->
+
+<!--- Unless required by applicable law or agreed to in writing, -->
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+<!--- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY -->
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+<!--- under the License. -->
+
+# Hexagon backend runtime
+
+The Hexagon runtime is a part of the TVM runtime that facilitates communication between a
host and a Hexagon device. There are two types of host/device arrangements that are supported:
+- X86/Linux host running Hexagon simulator,
+- Android/AArch64 host running on a physical device containing a Hexagon module (i.e. CSDP
or ADSP).
+
+The TVM runtime that contains Hexagon runtime is the one executing on host.  In either case,
there will need to be a separate TVM runtime (i.e.  the `libtvm_runtime.so` library) compiled
for execution on Hexagon.
+
+The prerequisite is to have Hexagon SDK installed, preferably version 3.5.0 or later. The
Hexagon SDK can be downloaded from https://developer.qualcomm.com/software/hexagon-dsp-sdk.
+
+### Compiling TVM runtime for x86
+
+This will use Hexagon simulator, which is provided in the Hexagon SDK.
+
+When configuring TVM (cmake), set the following variables:
+```
+USE_LLVM=llvm-config
+USE_HEXAGON_DEVICE=sim
+USE_HEXAGON_SDK=/path/to/sdk
+```
+
+Set the C/C++ compiler to `clang`, and pass `-DCMAKE_CXX_FLAGS='-stdlib=libc++'` to the cmake
command.
 
 Review comment:
   Does it a must? I use g++ and libstdc++ ever and no problem. 

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