Add CKW flow control writing methods

* Structures: if/else/else if, for, return.
* Add corresponding tests.

Partially resolves: COMPMID-6387
Signed-off-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Change-Id: I2912ccaf46f836907f21bb53fa82bcc1f48dd224
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/10199
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: SiCong Li <sicong.li@arm.com>
Reviewed-by: Gunes Bayir <gunes.bayir@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/compute_kernel_writer/src/cl/CLKernelWriter.h b/compute_kernel_writer/src/cl/CLKernelWriter.h
index d2c84f192e..9fc7e550a7 100644
--- a/compute_kernel_writer/src/cl/CLKernelWriter.h
+++ b/compute_kernel_writer/src/cl/CLKernelWriter.h
@@ -75,6 +75,23 @@ public:
     void op_ternary(const TileOperand &dst, TernaryOp op, const TileOperand &first, const TileOperand &second, const TileOperand &third) override;
 
     // =============================================================================================
+    // Flow control
+    // =============================================================================================
+
+    void op_if(const TileOperand &lhs, BinaryOp op, const TileOperand &rhs, const std::function<void()> &body) override;
+
+    void op_else_if(const TileOperand &lhs, BinaryOp op, const TileOperand &rhs, const std::function<void()> &body) override;
+
+    void op_else(const std::function<void()> &body) override;
+
+    void op_for_loop(
+        const TileOperand &var, BinaryOp cond_op, const TileOperand &cond_value,
+        const TileOperand &update_var, AssignmentOp update_op, const TileOperand &update_value,
+        const std::function<void()> &body) override;
+
+    void op_return() override;
+
+    // =============================================================================================
     // Misc
     // =============================================================================================
 
@@ -177,6 +194,18 @@ private:
         const TileOperand &x, const TileOperand &y, const TileOperand &z, const TileOperand &batch,
         const CLTile &dilation_x, const CLTile &dilation_y);
 
+    /** This function is the generic function to write both `if` and `else if` blocks.
+     *
+     * It is used for both @ref CLKernelWriter::op_if and @ref CLKernelWriter::op_else_if.
+     *
+     * @param[in] is_else True if this is an `else if` block, otherwise this is an `if` block.
+     * @param[in] lhs     The LHS tile of the condition.
+     * @param[in] op      The relational binary operator.
+     * @param[in] rhs     The RHS tile of the condition.
+     * @param[in] body    The function that writes the body of the else-if block.
+     */
+    void op_if_generic(bool is_else, const TileOperand &lhs, BinaryOp op, const TileOperand &rhs, const std::function<void()> &body);
+
     // For attributes
 private:
     /** This string contains the kernel body source code, not the full CL source code.