Merge pull request #382 from matthiasdiener/platform-detection

Fix platform detection for pocl

pyopencl/characterize/__init__.py

@@ -280,13 +280,15 @@ def get_simd_group_size(dev, type_size):
     except Exception:
         pass
 
-    lc_vendor = dev.platform.vendor.lower()
-    if "nvidia" in lc_vendor:
+    lc_plat_vendor = dev.platform.vendor.lower()
+    lc_dev_vendor = dev.vendor.lower()
+    if "nvidia" in lc_plat_vendor or "nvidia" in lc_dev_vendor:
         return 32
 
-    if ("advanced micro" in lc_vendor or "ati" in lc_vendor):
+    if ("advanced micro" in lc_plat_vendor or "ati" in lc_plat_vendor
+      or "advanced micro" in lc_dev_vendor or "ati" in lc_dev_vendor):
         if dev.type & cl.device_type.GPU:
-            # Tomasz Rybak says, in response to reduction mishbehaving on the AMD
+            # Tomasz Rybak says, in response to reduction misbehaving on the AMD
             # 'Loveland' APU:
             #
             #    Like in CUDA reduction bug (related to Fermi) it again seems