tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.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 ST_RECV = 1'b0;
localparam ST_EMIT = 1'b1;
// sequential state
reg state;
reg [12:0] write_ptr; // number of bytes stored (0..8191)
reg [1:0] lane_ptr; // lane for next byte
reg [11:0] cnt [0:3]; // per-lane byte counts during receive
reg [11:0] nLr [0:3]; // final per-lane byte counts
reg [8:0] BLr [0:3]; // per-lane block counts
reg [8:0] maxB; // max block index+1
reg [1:0] finalL; // lane of final emitted block
reg [8:0] finalI; // index of final emitted block
reg [1:0] cur_L; // currently presented block: lane
reg [8:0] cur_i; // currently presented block: index
reg [7:0] mem [0:8191]; // stored message bytes (global index)
// combinational scratch (used with blocking assigns inside clocked block)
integer li;
reg [11:0] nfin [0:3];
reg [8:0] cbv [0:3];
reg [8:0] tmaxB;
reg [1:0] tfinalL;
reg [8:0] tfinalI;
reg [8:0] ni_try;
reg [1:0] nxtL;
reg [8:0] nxtI;
reg found;
reg [11:0] selN;
reg [8:0] selB;
// number of 64-bit blocks a lane with n bytes produces
function [8:0] calcB(input [11:0] n);
reg [8:0] q;
reg [2:0] r;
begin
q = n[11:3];
r = n[2:0];
// r in 0..5 -> q+1 (marker+len fit / extra block for multiple of 8)
// r in 6..7 -> q+2 (length pushed to its own trailing block)
calcB = (r <= 3'd5) ? (q + 9'd1) : (q + 9'd2);
end
endfunction
// build the 64-bit block for lane L, block index bi.
// nL = lane byte count, BL = lane block count.
// bypass allows reading the byte currently being written (index bp_idx).
function [63:0] gen_block(input [1:0] L,
input [8:0] bi,
input [11:0] nL,
input [8:0] BL,
input use_bp,
input [12:0] bp_idx,
input [7:0] bp_val);
integer p;
integer j;
integer gidx;
reg [7:0] bb;
reg [15:0] lenbits;
begin
lenbits = {1'b0, nL, 3'b000}; // 8 * nL, in bits
gen_block = 64'd0;
for (p = 0; p < 8; p = p + 1) begin
j = bi * 8 + p;
if ((bi == (BL - 9'd1)) && (p >= 6)) begin
// length occupies bytes 6,7 of a lane's final block
bb = (p == 6) ? lenbits[15:8] : lenbits[7:0];
end else if (j < nL) begin
gidx = 4 * j + L;
if (use_bp && (gidx == bp_idx))
bb = bp_val;
else
bb = mem[gidx];
end else if (j == nL) begin
bb = 8'h80; // padding marker
end else begin
bb = 8'h00; // zero fill
end
// p==0 is the earliest byte -> block_o[63:56]
gen_block[(7 - p) * 8 +: 8] = bb;
end
end
endfunction
always @(posedge clk) begin
if (rst) begin
block_o <= 64'd0;
block_valid_o <= 1'b0;
byte_ready_o <= 1'b1;
done_o <= 1'b0;
busy_o <= 1'b0;
state <= ST_RECV;
write_ptr <= 13'd0;
lane_ptr <= 2'd0;
cur_L <= 2'd0;
cur_i <= 9'd0;
maxB <= 9'd0;
finalL <= 2'd0;
finalI <= 9'd0;
cnt[0] <= 12'd0; cnt[1] <= 12'd0; cnt[2] <= 12'd0; cnt[3] <= 12'd0;
nLr[0] <= 12'd0; nLr[1] <= 12'd0; nLr[2] <= 12'd0; nLr[3] <= 12'd0;
BLr[0] <= 9'd0; BLr[1] <= 9'd0; BLr[2] <= 9'd0; BLr[3] <= 9'd0;
end else begin
case (state)
ST_RECV: begin
if (byte_valid_i && byte_ready_o) begin
// accept the byte
mem[write_ptr] <= byte_i;
write_ptr <= write_ptr + 13'd1;
cnt[lane_ptr] <= cnt[lane_ptr] + 12'd1;
lane_ptr <= (lane_ptr == 2'd3) ? 2'd0 : (lane_ptr + 2'd1);
busy_o <= 1'b1;
if (last_i) begin
// compute final per-lane counts (including this byte)
for (li = 0; li < 4; li = li + 1)
nfin[li] = cnt[li] + ((lane_ptr == li[1:0]) ? 12'd1 : 12'd0);
for (li = 0; li < 4; li = li + 1)
cbv[li] = calcB(nfin[li]);
tmaxB = cbv[0];
for (li = 1; li < 4; li = li + 1)
if (cbv[li] > tmaxB) tmaxB = cbv[li];
tfinalL = 2'd0;
for (li = 0; li < 4; li = li + 1)
if (cbv[li] == tmaxB) tfinalL = li[1:0]; // highest such lane
tfinalI = tmaxB - 9'd1;
// store schedule
for (li = 0; li < 4; li = li + 1) begin
nLr[li] <= nfin[li];
BLr[li] <= cbv[li];
end
maxB <= tmaxB;
finalL <= tfinalL;
finalI <= tfinalI;
// present first block (lane 0, index 0) immediately;
// bypass the byte just accepted (not yet in mem)
cur_L <= 2'd0;
cur_i <= 9'd0;
block_o <= gen_block(2'd0, 9'd0, nfin[0], cbv[0],
1'b1, write_ptr, byte_i);
done_o <= ((tfinalL == 2'd0) && (tfinalI == 9'd0));
block_valid_o <= 1'b1;
byte_ready_o <= 1'b0;
state <= ST_EMIT;
end
end
end
ST_EMIT: begin
if (block_valid_o && block_ready_i) begin
// find the next (lane,index) in emission order
found = 1'b0;
nxtL = 2'd0;
nxtI = 9'd0;
for (li = 0; li < 4; li = li + 1)
if (!found && (li[1:0] > cur_L) && (cur_i < BLr[li])) begin
nxtL = li[1:0]; nxtI = cur_i; found = 1'b1;
end
if (!found) begin
ni_try = cur_i + 9'd1;
if (ni_try < maxB)
for (li = 0; li < 4; li = li + 1)
if (!found && (ni_try < BLr[li])) begin
nxtL = li[1:0]; nxtI = ni_try; found = 1'b1;
end
end
if (found) begin
cur_L <= nxtL;
cur_i <= nxtI;
selN = nLr[nxtL];
selB = BLr[nxtL];
block_o <= gen_block(nxtL, nxtI, selN, selB,
1'b0, 13'd0, 8'd0);
done_o <= ((nxtL == finalL) && (nxtI == finalI));
end else begin
// final block accepted; return to receive
block_valid_o <= 1'b0;
done_o <= 1'b0;
busy_o <= 1'b0;
byte_ready_o <= 1'b1;
state <= ST_RECV;
write_ptr <= 13'd0;
lane_ptr <= 2'd0;
cnt[0] <= 12'd0; cnt[1] <= 12'd0;
cnt[2] <= 12'd0; cnt[3] <= 12'd0;
end
end
end
endcase
end
end
endmodule
Compile dut.sv with iverilog
iverilog -g2012 -o /tmp/dut_test dut.sv 2>&1 && echo "COMPILE OK"
COMPILE OK [stdout] COMPILE OK
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_d744c19eb086458f. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.
Trial trial_d744c19eb086458f · verifier authoritative; classifier explanatory.