Fix manual LOOP_UNROLLING

The issue is caused by the number of iterations passed to
LOOP_UNROLLING. When we use the manual LOOP_UNROLLING, the number of
iterations must be less than or equal to 128.
To overcome this problem, we create a utility function to check if
any of the critical iterations (kernel dimensions) are beyond that
limit. If so, the utility function, disable the manual loop unrolling.

Resolves COMPMID-4609

Change-Id: I7221c967609e462a5abd1cbb74e2a120f344fcb3
Signed-off-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5913
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/core/CL/CLHelpers.cpp b/src/core/CL/CLHelpers.cpp
index 3323929742..5c53455eeb 100644
--- a/src/core/CL/CLHelpers.cpp
+++ b/src/core/CL/CLHelpers.cpp
@@ -466,4 +466,16 @@ bool export_weights_to_cl_image(const ITensorInfo *tensor)
     return true;
 }
 
+void set_unroll_with_pragma(CLBuildOptions &built_opts, std::initializer_list<int> values)
+{
+    for(const int value : values)
+    {
+        if(value > max_manual_loop_unrolling)
+        {
+            built_opts.add_option("-DUNROLL_WITH_PRAGMA");
+            return;
+        }
+    }
+}
+
 } // namespace arm_compute