COMPMID-3460: Refactor NEElementwiseUnaryKernel

Removed most of the templates and refactored the code.
Performance is the same but the libary size dropped by
52Kb.

Change-Id: I41ff0c0853c923d925cdaeb05f4a58c9086fff94
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3190
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/core/NEON/wrapper/intrinsics/log.h b/arm_compute/core/NEON/wrapper/intrinsics/log.h
index bb4181e..682830c 100644
--- a/arm_compute/core/NEON/wrapper/intrinsics/log.h
+++ b/arm_compute/core/NEON/wrapper/intrinsics/log.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019 ARM Limited.
+ * Copyright (c) 2018-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -37,10 +37,19 @@
         return prefix##_##postfix(a);     \
     }
 
+#define VLOG_IMPL_INT(vtype, prefix, postfix) \
+    inline vtype vlog(const vtype &a)         \
+    {                                         \
+        ARM_COMPUTE_UNUSED(a);                \
+        ARM_COMPUTE_ERROR("Not supported");   \
+    }
+
 VLOG_IMPL(float32x4_t, vlogq, f32)
 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
 VLOG_IMPL(float16x8_t, vlogq, f16)
 #endif // __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
+VLOG_IMPL_INT(int32x4_t, vlogq, s32)
+
 #undef VLOG_IMPL
 } // namespace wrapper
 } // namespace arm_compute