acl_driver.md

ARM Compute Library Driver

Tengine is already supported ARM Comporte Library (ACL). This version ,ACL Driver only can use OpenCL device.

1.How to enable Tengine with ACL Driver

1.1 build ACL

```
git clone https://github.com/ARM-software/ComputeLibrary.git    
git checkout v18.05
scons Werror=1 -j4 debug=0 asserts=1 neon=0 opencl=1 embed_kernels=1 os=linux arch=arm64-v8a
```

1.2 build Tengine with ACL

Enable ACL_GPU support in Tegnine `makefile.config`.

```
CONFIG_ACL_GPU=y
ACL_ROOT=/home/firefly/ComputeLibrary
``` 
if you already build tengine, remember to remove `rm -r build/driver` and then rebuild 
```
make
```

2.How to use ACL Driver

If you want to use ACL Driver to run a graph, you need to explicitly set default device by ACL Device. You can see how to explicitly set device intests/bin/bench_sqz.cpp.

    ...
    while((res=getopt(argc,argv,"d:f:r:"))!=-1)
    {  
      switch(res)
      {  
         case 'd': 
            device = optarg;
            break;
    ...
    if("" != device)
        set_default_device( device.c_str());
    ...

Running:

Example: ./build/tests/bin/bench_sqz -d acl_opencl