fix the exclusive scan

Author: devshgraphicsprogramming

examples_tests/48.ArithmeticUnitTest/main.cpp

@@ -295,7 +295,7 @@ int main()
 		for (uint32_t i=0u; i<BUFFER_DWORD_COUNT; i++)
 		{
 			// TODO: use random numbers, but right now I need to see whats going on in order to debug
-			inputData[i] = i;// randGenerator();
+			inputData[i] = randGenerator();
 		}
 	}
 	auto gpuinputDataBuffer = driver->createFilledDeviceLocalGPUBufferOnDedMem(kBufferSize, inputData);

include/irr/builtin/glsl/workgroup/ballot.glsl

@@ -228,10 +228,7 @@ uint irr_glsl_workgroupBallotFindMSB();
 			if (gl_LocalInvocationIndex<lastInvocation) \
 				_IRR_GLSL_SCRATCH_SHARED_DEFINED_[gl_LocalInvocationIndex+1u] = firstLevelScan; \
 			barrier(); \
-			if (gl_LocalInvocationIndex<lastInvocation) \
-				return gl_LocalInvocationIndex!=0u ? CONV(_IRR_GLSL_SCRATCH_SHARED_DEFINED_[gl_LocalInvocationIndex]):IDENTITY; \
-			else \
-				return IDENTITY; \
+			return any(bvec2(gl_LocalInvocationIndex!=0u,gl_LocalInvocationIndex<=lastInvocation)) ? CONV(_IRR_GLSL_SCRATCH_SHARED_DEFINED_[gl_LocalInvocationIndex]):IDENTITY; \
 	} \
 	else \
 		return CONV(firstLevelScan);