Break up core/Utils.h to reduce unused code being included everywhere

Makes a small difference to compile times and opens up other opportunities
to simplify code.

Change-Id: I232876910bbe4fa9719f4a0ce4a54c090faeb5ef
Signed-off-by: Matthew Bentham <Matthew.Bentham@arm.com>
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/c/VisualCompute/ComputeLibrary/+/532429
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9856
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/arm_compute/core/utils/helpers/AdjustVecSize.h b/arm_compute/core/utils/helpers/AdjustVecSize.h
new file mode 100644
index 0000000000..bbb3048b84
--- /dev/null
+++ b/arm_compute/core/utils/helpers/AdjustVecSize.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2016-2023 Arm Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_UTILS_ADJUSTVECSIZE_H
+#define ARM_COMPUTE_UTILS_ADJUSTVECSIZE_H
+
+#include "arm_compute/core/Error.h"
+
+namespace arm_compute
+{
+/** Returns the adjusted vector size in case it is less than the input's first dimension, getting rounded down to its closest valid vector size
+ *
+ * @param[in] vec_size vector size to be adjusted
+ * @param[in] dim0     size of the first dimension
+ *
+ * @return the number of element processed along the X axis per thread
+ */
+inline unsigned int adjust_vec_size(unsigned int vec_size, size_t dim0)
+{
+    ARM_COMPUTE_ERROR_ON(vec_size > 16);
+
+    if((vec_size >= dim0) && (dim0 == 3))
+    {
+        return dim0;
+    }
+
+    while(vec_size > dim0)
+    {
+        vec_size >>= 1;
+    }
+
+    return vec_size;
+}
+}
+#endif /*ARM_COMPUTE_UTILS_H */