Some improvements

autotune/python/utils.py

@@ -0,0 +1,33 @@
+import pyopencl as cl
+import pyviennacl as vcl
+
+all_devices = [d for platform in cl.get_platforms() for d in platform.get_devices()]
+
+DEVICE_TYPE_PREFIX = {  cl.device_type.GPU: 'gpu',
+                        cl.device_type.CPU: 'cpu',
+                        cl.device_type.ACCELERATOR: 'accelerator' 
+}
+     
+DEVICE_TYPE_CL_NAME = { cl.device_type.GPU: 'CL_DEVICE_TYPE_GPU',
+                        cl.device_type.CPU: 'CL_DEVICE_TYPE_CPU',
+                        cl.device_type.ACCELERATOR: 'CL_DEVICE_TYPE_ACCELERATOR' 
+}
+                        
+VENDOR_PREFIX = {       vcl.opencl.VendorId.beignet_id: 'beignet',
+                        vcl.opencl.VendorId.nvidia_id: 'nvidia',
+                        vcl.opencl.VendorId.amd_id: 'amd',
+                        vcl.opencl.VendorId.intel_id: 'intel' 
+}
+
+DEVICES_PRESETS = {'all': all_devices,
+                   'gpus': [d for d in all_devices if d.type==cl.device_type.GPU],
+                   'cpus': [d for d in all_devices if d.type==cl.device_type.CPU],
+                   'accelerators': [d for d in all_devices if d.type==cl.device_type.ACCELERATOR]
+}
+
+
+                          
+def sanitize_string(string, keep_chars = ['_']):
+  string = string.replace(' ', '_').lower()
+  string = "".join(c for c in string if c.isalnum() or c in keep_chars).rstrip()
+  return string