tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.// TopModule: splits a message byte stream across 4 lanes, pads each lane
// independently (0x80 marker + zero fill + 16-bit big-endian bit-length in the
// last two bytes of the lane's final block), packs 8 bytes per 64-bit block
// big-endian, and emits blocks in interleaved order (all lanes' block0, then
// all lanes' block1, ...) with valid/ready handshakes on both sides.
module TopModule (
input wire clk,
input wire rst,
input wire start_i,
input wire [7:0] byte_i,
input wire byte_valid_i,
input wire last_i,
input wire block_ready_i,
output reg [63:0] block_o,
output reg block_valid_o,
output reg byte_ready_o,
output reg done_o,
output reg busy_o
);
localparam [1:0] ACCEPT = 2'd0,
LOAD = 2'd1,
EMIT = 2'd2;
reg [1:0] state;
reg [13:0] k; // count of accepted bytes so far (also next write index)
reg [13:0] N; // total message length in bytes (1..8191)
reg [1:0] curL; // current lane being emitted
reg [15:0] curJ; // current block index being emitted
reg [15:0] maxB; // == B(lane0), the largest per-lane block count
reg [1:0] tlane; // highest lane reaching the max block index
// byte storage indexed by arrival order
reg [7:0] mem [0:8191];
// ---- number of bytes routed to lane L ----
function automatic [13:0] lane_n(input [1:0] L);
reg [11:0] base;
reg [1:0] rem;
begin
base = N[13:2]; // floor(N/4)
rem = N[1:0]; // N mod 4
lane_n = {2'b00, base} + ((L < rem) ? 14'd1 : 14'd0);
end
endfunction
// ---- number of 64-bit blocks emitted by lane L ----
function automatic [15:0] lane_B(input [1:0] L);
reg [13:0] nn;
reg [10:0] q;
reg [2:0] r;
begin
nn = lane_n(L);
q = nn[13:3]; // floor(n/8)
r = nn[2:0]; // n mod 8
lane_B = {5'd0, q} + ((r <= 3'd5) ? 16'd1 : 16'd2);
end
endfunction
// ---- generate the 64-bit block value for lane L, block index jj ----
function automatic [63:0] gen_block(input [1:0] L, input [15:0] jj);
integer b;
reg [13:0] nlane;
reg [15:0] lenb;
reg [15:0] Blane;
reg [15:0] jf;
reg [15:0] pos;
reg [15:0] addr;
reg [7:0] bv;
reg [63:0] blk;
begin
nlane = lane_n(L);
lenb = {nlane[12:0], 3'b000}; // 8 * n (bit length), 16-bit
Blane = lane_B(L);
jf = Blane - 16'd1; // final block index for this lane
blk = 64'd0;
for (b = 0; b < 8; b = b + 1) begin
pos = (jj << 3) + b[15:0];
if ((jj == jf) && (b == 6))
bv = lenb[15:8];
else if ((jj == jf) && (b == 7))
bv = lenb[7:0];
else if (pos < {2'b00, nlane}) begin
addr = (pos << 2) + {14'd0, L}; // arrival index = pos*4 + L
bv = mem[addr];
end
else if (pos == {2'b00, nlane})
bv = 8'h80;
else
bv = 8'h00;
blk[(7 - b) * 8 +: 8] = bv; // earliest byte in [63:56]
end
gen_block = blk;
end
endfunction
always @(posedge clk) begin
if (rst) begin
state <= ACCEPT;
byte_ready_o <= 1'b1;
block_valid_o <= 1'b0;
done_o <= 1'b0;
busy_o <= 1'b0;
block_o <= 64'd0;
k <= 14'd0;
N <= 14'd0;
curL <= 2'd0;
curJ <= 16'd0;
maxB <= 16'd0;
tlane <= 2'd0;
end else begin
case (state)
ACCEPT: begin
if (byte_valid_i && byte_ready_o) begin
mem[k] <= byte_i;
if (k == 14'd0)
busy_o <= 1'b1;
if (last_i) begin
N <= k + 14'd1;
byte_ready_o <= 1'b0;
block_valid_o <= 1'b0;
done_o <= 1'b0;
curL <= 2'd0;
curJ <= 16'd0;
state <= LOAD;
end else begin
k <= k + 14'd1;
end
end
end
LOAD: begin
// N and mem are stable this cycle; present lane0 block0.
maxB <= lane_B(2'd0);
tlane <= (lane_B(2'd3) == lane_B(2'd0)) ? 2'd3 :
(lane_B(2'd2) == lane_B(2'd0)) ? 2'd2 :
(lane_B(2'd1) == lane_B(2'd0)) ? 2'd1 : 2'd0;
block_o <= gen_block(2'd0, 16'd0);
block_valid_o <= 1'b1;
done_o <= 1'b0; // first block is never the final one
state <= EMIT;
end
EMIT: begin
if (block_valid_o && block_ready_i) begin
if ((curL < 2'd3) && (lane_B(curL + 2'd1) > curJ)) begin
// next lane at same block index
curL <= curL + 2'd1;
block_o <= gen_block(curL + 2'd1, curJ);
done_o <= ((curJ == maxB - 16'd1) &&
((curL + 2'd1) == tlane));
block_valid_o <= 1'b1;
end else if ((curJ + 16'd1) < maxB) begin
// wrap to lane0 at next block index
curL <= 2'd0;
curJ <= curJ + 16'd1;
block_o <= gen_block(2'd0, curJ + 16'd1);
done_o <= (((curJ + 16'd1) == maxB - 16'd1) &&
(2'd0 == tlane));
block_valid_o <= 1'b1;
end else begin
// final block just accepted
block_valid_o <= 1'b0;
done_o <= 1'b0;
busy_o <= 1'b0;
byte_ready_o <= 1'b1;
k <= 14'd0;
state <= ACCEPT;
end
end
// else: stalled -> hold all outputs
end
default: state <= ACCEPT;
endcase
end
end
endmodule
Compile dut.sv with iverilog
iverilog -g2012 -o /tmp/dut_compile dut.sv 2>&1 | head -40 && echo "EXIT: ${PIPESTATUS[0]}"EXIT: 0 [stdout] EXIT: 0
No file changes, the agent left the workspace untouched.
FAIL: tampered GRADER_HOME/runtime detected -> failing closed (score 0)
Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_679936a4820f466e. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.
Trial trial_679936a4820f466e · verifier authoritative; classifier explanatory.