codellama:13b | RAG on

module fixed_point_adder #(parameter Q = 8, N = 16) (
    input wire [N-1:0] a,
    input wire [N-1:0] b,
    output wire [N-1:0] c
);
    // Internal registers
    reg [N-1:0] res;

    // Absolute value addition
    always @* begin
        if (a[N-1] == b[N-1]) begin
            res = a + b;
        end else begin
            if (a > b) begin
                res = a - b;
            end else begin
                res = b - a;
            end
        end
    end

    // Precision handling
    always @* begin
        c = {res[N-1:Q], res[Q-1:0]};
    end
endmodule

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_1/generated.v:24: error: c is not a valid l-value in fixed_point_adder.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_1/generated.v:4:      : c is declared here as wire.
Elaboration failed

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_1/functional/generated.v:24: error: c is not a valid l-value in testbench.fp_adder.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_1/functional/generated.v:4:      : c is declared here as wire.
1 error(s) during elaboration.

[error]
None

[
  {
    "stage": "syntax",
    "code": "syntax.iverilog_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_1/generated.v:24: error: c is not a valid l-value in fixed_point_adder.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_1/generated.v:4:      : c is declared here as wire.\nElaboration failed\n",
    "retryable": false,
    "details": {}
  },
  {
    "stage": "functional",
    "code": "functional.testbench_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_1/functional/generated.v:24: error: c is not a valid l-value in testbench.fp_adder.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_1/functional/generated.v:4:      : c is declared here as wire.\n1 error(s) during elaboration.\n",
    "retryable": false,
    "details": {}
  }
]

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": false,
  "functional_ok": false,
  "openlane_ok": false,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": false,
  "success": false
}

module fixed_point_adder #(parameter Q = 8, N = 16) (
    input [N-1:0] a, b,
    output reg [N-1:0] c
);

// Internal registers
reg [N-1:0] res;

always @* begin
    // Absolute value addition
    if (a[N-1] == b[N-1]) begin
        res = a + b;
    end else begin
        // Absolute value subtraction
        if (a > b) begin
            res = a - b;
        end else begin
            res = b - a;
        end
    end
end

// Precision
assign c = {res[N-1:Q], res[Q-1:0]};

// Overflow handling
always @(posedge clk) begin
    if (a[N-1] != b[N-1]) begin
        if (res[N-1] == 1'b1) begin
            // Positive overflow
            c = {1'b0, res[Q-1:0]};
        end else begin
...

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/generated.v:31: error: c Unable to assign to unresolved wires.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/generated.v:34: error: c Unable to assign to unresolved wires.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/generated.v:27: error: Unable to bind wire/reg/memory `clk' in `fixed_point_adder'
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/generated.v:27: error: Failed to evaluate event expression 'posedge clk'.
4 error(s) during elaboration.

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/functional/generated.v:31: error: c Unable to assign to unresolved wires.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/functional/generated.v:34: error: c Unable to assign to unresolved wires.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/functional/generated.v:27: error: Unable to bind wire/reg/memory `clk' in `testbench.fp_adder'
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/functional/generated.v:27: error: Failed to evaluate event expression 'posedge clk'.
4 error(s) during elaboration.

[error]
None

[
  {
    "stage": "syntax",
    "code": "syntax.iverilog_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/generated.v:31: error: c Unable to assign to unresolved wires.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/generated.v:34: error: c Unable to assign to unresolved wires.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/generated.v:27: error: Unable to bind wire/reg/memory `clk' in `fixed_point_adder'\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/generated.v:27: error: Failed to evaluate event expression 'posedge clk'.\n4 error(s) during elaboration.\n",
    "retryable": false,
    "details": {}
  },
  {
    "stage": "functional",
    "code": "functional.testbench_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/functional/generated.v:31: error: c Unable to assign to unresolved wires.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/functional/generated.v:34: error: c Unable to assign to unresolved wires.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/functional/generated.v:27: error: Unable to bind wire/reg/memory `clk' in `testbench.fp_adder'\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_2/functional/generated.v:27: error: Failed to evaluate event expression 'posedge clk'.\n4 error(s) during elaboration.\n",
    "retryable": false,
    "details": {}
  }
]

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": false,
  "functional_ok": false,
  "openlane_ok": false,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": false,
  "success": false
}

module fixed_point_adder #(parameter Q = 8, parameter N = 16) (
    input signed [N-1:0] a,
    input signed [N-1:0] b,
    output reg signed [N-1:0] c
);

// Internal registers
reg [N-1:0] res;

always @* begin
    // Absolute value addition
    if (a[N-1] == b[N-1]) begin
        res = a + b;
    end else begin
        // Absolute value subtraction
        if (a > b) begin
            res = a - b;
        end else begin
            res = b - a;
        end
    end
end

// Precision
assign c = {res[N-1:Q], res[Q-1:0]};

// Overflow handling
if (res[N-1]) begin
    // Overflow occurred, set MSB to 0
    assign c = {1'b0, res[N-2:Q], res[Q-1:0]};
end else begin
    // No overflow, keep result as is
...

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_3/generated.v:34: syntax error
I give up.

[stderr]
/workspace/banchmarks/rtllm/13_rtllm_arithmetic/task_16/tb.v:1: error: timescale directive cannot be inside a module definition.
/workspace/banchmarks/rtllm/13_rtllm_arithmetic/task_16/tb.v:58: syntax error
I give up.

[error]
None

[
  {
    "stage": "syntax",
    "code": "syntax.iverilog_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_3/generated.v:34: syntax error\nI give up.\n",
    "retryable": false,
    "details": {}
  },
  {
    "stage": "functional",
    "code": "functional.testbench_failed",
    "message": "/workspace/banchmarks/rtllm/13_rtllm_arithmetic/task_16/tb.v:1: error: timescale directive cannot be inside a module definition.\n/workspace/banchmarks/rtllm/13_rtllm_arithmetic/task_16/tb.v:58: syntax error\nI give up.\n",
    "retryable": false,
    "details": {}
  }
]

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": false,
  "functional_ok": false,
  "openlane_ok": false,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": false,
  "success": false
}

module fixed_point_adder #(parameter Q = 8, N = 16) (
    input wire signed [N-1:0] a,
    input wire signed [N-1:0] b,
    output wire signed [N-1:0] c
);

// Internal registers
reg [N-1:0] res;

// Absolute value addition
always @* begin
    if (a[N-1] == b[N-1]) begin
        res = a + b;
    end else begin
        // Absolute value subtraction
        if (a > b) begin
            res = a - b;
        end else begin
            res = b - a;
        end
    end
end

// Precision
assign c = res[N-1:0];

// Overflow handling
always @* begin
    if (res > 2**(N-1)) begin
        // Overflow occurred, set MSB to 1
        c[N-1] = 1;
    end else begin
...

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/generated.v:31: error: c[(N)-('sd1)] is not a valid l-value in fixed_point_adder.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/generated.v:4:      : c[(N)-('sd1)] is declared here as wire.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/generated.v:34: error: c[(N)-('sd1)] is not a valid l-value in fixed_point_adder.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/generated.v:4:      : c[(N)-('sd1)] is declared here as wire.
2 error(s) during elaboration.

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/functional/generated.v:31: error: c[(N)-('sd1)] is not a valid l-value in testbench.fp_adder.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/functional/generated.v:4:      : c[(N)-('sd1)] is declared here as wire.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/functional/generated.v:34: error: c[(N)-('sd1)] is not a valid l-value in testbench.fp_adder.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/functional/generated.v:4:      : c[(N)-('sd1)] is declared here as wire.
2 error(s) during elaboration.

[error]
None

[
  {
    "stage": "syntax",
    "code": "syntax.iverilog_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/generated.v:31: error: c[(N)-('sd1)] is not a valid l-value in fixed_point_adder.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/generated.v:4:      : c[(N)-('sd1)] is declared here as wire.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/generated.v:34: error: c[(N)-('sd1)] is not a valid l-value in fixed_point_adder.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/generated.v:4:      : c[(N)-('sd1)] is declared here as wire.\n2 error(s) during elaboration.\n",
    "retryable": false,
    "details": {}
  },
  {
    "stage": "functional",
    "code": "functional.testbench_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/functional/generated.v:31: error: c[(N)-('sd1)] is not a valid l-value in testbench.fp_adder.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/functional/generated.v:4:      : c[(N)-('sd1)] is declared here as wire.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/functional/generated.v:34: error: c[(N)-('sd1)] is not a valid l-value in testbench.fp_adder.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_4/functional/generated.v:4:      : c[(N)-('sd1)] is declared here as wire.\n2 error(s) during elaboration.\n",
    "retryable": false,
    "details": {}
  }
]

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": false,
  "functional_ok": false,
  "openlane_ok": false,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": false,
  "success": false
}

module fixed_point_adder #(parameter Q = 8, N = 16) (
    input wire [N-1:0] a,
    input wire [N-1:0] b,
    output wire [N-1:0] c
);

// Internal registers
reg [N-1:0] res;

// Absolute value addition
always @(a or b) begin
    if (a[N-1] == b[N-1]) begin
        // Both positive or both negative, add absolute values
        res = a + b;
    end else begin
        // Different signs, subtract larger from smaller
        if (a > b) begin
            res = a - b;
        end else begin
            res = b - a;
        end
    end
end

// Precision
assign c = {res[N-1], res[Q-1:0]};

endmodule

[stdout]
xxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Test failed: a = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, b = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
=========== Test completed with         100 /100 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_arithmetic/task_16/tb.v:55: $finish called at 1000000 (1ps)

[error]
None

[
  {
    "stage": "functional",
    "code": "functional.output_failed_marker",
    "message": "Functional output contains failure marker: TEST FAILED. xxxx, c = 0000000000000000xxxxxxxxxxxxxxxx, expected_result = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    "retryable": false,
    "details": {
      "marker": "TEST FAILED"
    }
  },
  {
    "stage": "openlane",
    "code": "openlane.invalidated_by_functional_failure",
    "message": "OpenLane result invalidated because functional validation failed after output-marker correction",
    "retryable": false,
    "details": {}
  }
]

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": false,
  "openlane_ok": false,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": false,
  "success": false
}

module fixed_point_adder #(parameter Q = 8, parameter N = 16) (
    input wire signed [N-1:0] a,
    input wire signed [N-1:0] b,
    output reg signed [N-1:0] c
);

// Internal registers
reg [N-1:0] res;

always @* begin
    // Absolute value addition
    if (a[N-1] == b[N-1]) begin
        res = a + b;
    end
    // Absolute value subtraction
    else begin
        if (a > b) begin
            res = a - b;
        end
        else begin
            res = b - a;
        end
    end
end

// Precision
assign c = {res[N-1:Q], res[Q-1:0]};

// Overflow handling
always @* begin
    if (res > 2**(N-1) - 1 || res < -2**(N-1)) begin
        $error("Overflow detected");
...

[stdout]
=========== Your Design Passed ===========
/workspace/banchmarks/rtllm/13_rtllm_arithmetic/task_16/tb.v:55: $finish called at 1000000 (1ps)

[error]
OpenLane failed: 2

[
  {
    "stage": "openlane",
    "code": "openlane.failed",
    "message": "OpenLane failed: 2",
    "retryable": false,
    "details": {}
  }
]

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": false,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": false,
  "success": false
}

module fixed_point_adder #(parameter Q = 8, N = 16) (
    input wire [N-1:0] a,
    input wire [N-1:0] b,
    output reg [N-1:0] c
);

// Internal registers
reg [N-1:0] res;

always @* begin
    // Absolute value addition
    if (a[N-1] == b[N-1]) begin
        res = a + b;
    end else begin
        // Absolute value subtraction
        if (a > b) begin
            res = a - b;
        end else begin
            res = b - a;
        end
    end
end

// Precision
assign c[N-1:Q] = res[N-1:Q];

// Overflow handling
always @* begin
    if (res > 2**(N-1)) begin
        // Overflow occurred, set MSB to 0
        c[N-1] = 0;
    end else begin
...

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_7/generated.v:31: error: Bit 15 is already driven.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_7/generated.v:34: error: Bit 15 is already driven.
2 error(s) during elaboration.

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_7/functional/generated.v:31: error: Bit 31 is already driven.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_7/functional/generated.v:34: error: Bit 31 is already driven.
2 error(s) during elaboration.

[error]
None

[
  {
    "stage": "syntax",
    "code": "syntax.iverilog_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_7/generated.v:31: error: Bit 15 is already driven.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_7/generated.v:34: error: Bit 15 is already driven.\n2 error(s) during elaboration.\n",
    "retryable": false,
    "details": {}
  },
  {
    "stage": "functional",
    "code": "functional.testbench_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_7/functional/generated.v:31: error: Bit 31 is already driven.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_7/functional/generated.v:34: error: Bit 31 is already driven.\n2 error(s) during elaboration.\n",
    "retryable": false,
    "details": {}
  }
]

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": false,
  "functional_ok": false,
  "openlane_ok": false,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": false,
  "success": false
}

module fixed_point_adder #(parameter Q = 8, N = 16) (
    input wire [N-1:0] a,
    input wire [N-1:0] b,
    output reg [N-1:0] c
);

// Internal registers
reg [N-1:0] res;

always @* begin
    // Absolute value addition
    if (a[N-1] == b[N-1]) begin
        res = a + b;
    end else begin
        // Absolute value subtraction
        if (a > b) begin
            res = a - b;
        end else begin
            res = b - a;
        end
    end
end

// Precision handling
assign c = {res[N-1:Q], res[Q-1:0]};

// Overflow handling
always @(posedge clk) begin
    if (res > 2**N - 1) begin
        // Overflow occurred, set MSB to 1
        c[N-1] = 1;
    end else begin
...

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/generated.v:31: error: Bit 15 is already driven.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/generated.v:34: error: Bit 15 is already driven.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/generated.v:28: error: Unable to bind wire/reg/memory `clk' in `fixed_point_adder'
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/generated.v:28: error: Failed to evaluate event expression 'posedge clk'.
4 error(s) during elaboration.

[stderr]
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/functional/generated.v:31: error: Bit 31 is already driven.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/functional/generated.v:34: error: Bit 31 is already driven.
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/functional/generated.v:28: error: Unable to bind wire/reg/memory `clk' in `testbench.fp_adder'
/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/functional/generated.v:28: error: Failed to evaluate event expression 'posedge clk'.
4 error(s) during elaboration.

[error]
None

[
  {
    "stage": "syntax",
    "code": "syntax.iverilog_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/generated.v:31: error: Bit 15 is already driven.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/generated.v:34: error: Bit 15 is already driven.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/generated.v:28: error: Unable to bind wire/reg/memory `clk' in `fixed_point_adder'\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/generated.v:28: error: Failed to evaluate event expression 'posedge clk'.\n4 error(s) during elaboration.\n",
    "retryable": false,
    "details": {}
  },
  {
    "stage": "functional",
    "code": "functional.testbench_failed",
    "message": "/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/functional/generated.v:31: error: Bit 31 is already driven.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/functional/generated.v:34: error: Bit 31 is already driven.\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/functional/generated.v:28: error: Unable to bind wire/reg/memory `clk' in `testbench.fp_adder'\n/data/eval/out/run_20260426_075435_225972_f32200/tmp/codellama/rtllm__13_rtllm_arithmetic__task_16/sample_8/functional/generated.v:28: error: Failed to evaluate event expression 'posedge clk'.\n4 error(s) during elaboration.\n",
    "retryable": false,
    "details": {}
  }
]

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": false,
  "functional_ok": false,
  "openlane_ok": false,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": false,
  "success": false
}

module fixed_point_adder #(parameter Q = 8, N = 16) (
    input wire [N-1:0] a, b,
    output wire [N-1:0] c
);

// Internal registers
reg [N-1:0] res;

always @* begin
    // Absolute value addition
    if (a[N-1] == b[N-1]) begin
        res = a + b;
    end else begin
        // Absolute value subtraction
        if (a > b) begin
            res = a - b;
        end else begin
            res = b - a;
        end
    end
end

// Precision
assign c = {res[N-1:Q], res[Q-1:0]};

endmodule

[stdout]
=========== Your Design Passed ===========
/workspace/banchmarks/rtllm/13_rtllm_arithmetic/task_16/tb.v:55: $finish called at 1000000 (1ps)

[error]
None

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}

module fixed_point_adder #(parameter Q = 8, N = 16) (
    input wire signed [N-1:0] a,
    input wire signed [N-1:0] b,
    output reg signed [N-1:0] c
);

// Internal registers
reg signed [N-1:0] res;

always @* begin
    // Absolute value addition
    if (a[N-1] == b[N-1]) begin
        res = a + b;
    end else begin
        // Absolute value subtraction
        if (a > b) begin
            res = a - b;
        end else begin
            res = b - a;
        end
    end
end

// Precision handling
always @* begin
    c = {res[N-1], res[Q-1:0]};
end

// Overflow handling
always @* begin
    if (c[N-1]) begin
        // Overflow detected
...

[stdout]
=========== Your Design Passed ===========
/workspace/banchmarks/rtllm/13_rtllm_arithmetic/task_16/tb.v:55: $finish called at 1000000 (1ps)

[error]
None

{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}