tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.module TopModule(
input logic clk,
input logic rst,
input logic start_i,
input logic [7:0] byte_i,
input logic byte_valid_i,
input logic last_i,
input logic block_ready_i,
output logic [63:0] block_o,
output logic block_valid_o,
output logic byte_ready_o,
output logic done_o,
output logic busy_o
);
localparam RECV = 1'b0;
localparam SEND = 1'b1;
// ---------------- state / storage ----------------
reg state;
reg [7:0] mem [0:8191];
reg [13:0] cnt; // bytes accepted so far in current message
reg [13:0] N; // latched message length
reg [8:0] curi; // current block index within a lane
reg [1:0] curj; // current lane
// ---------------- functions ----------------
// number of blocks a lane of L bytes produces
function automatic [10:0] nblk(input [13:0] L);
reg [10:0] q; reg [2:0] r;
begin
q = L[13:3];
r = L[2:0];
nblk = (r <= 3'd5) ? (q + 11'd1) : (q + 11'd2);
end
endfunction
// next emission pointer given current (ci,cj) and per-lane block counts
function automatic [10:0] next_ptr(input [8:0] ci, input [1:0] cj,
input [10:0] b0, input [10:0] b1,
input [10:0] b2, input [10:0] b3);
reg [10:0] arr [0:3];
reg [8:0] ii; reg [1:0] jj; reg fnd; integer x;
begin
arr[0]=b0; arr[1]=b1; arr[2]=b2; arr[3]=b3;
ii = ci; jj = cj; fnd = 1'b0;
// same index, higher lanes
for (x=0; x<4; x=x+1) begin
if (!fnd && (x > cj) && (ci < arr[x])) begin
ii = ci; jj = x[1:0]; fnd = 1'b1;
end
end
// next index, lanes 0..3
if (!fnd) begin
for (x=0; x<4; x=x+1) begin
if (!fnd && ((ci + 9'd1) < arr[x])) begin
ii = ci + 9'd1; jj = x[1:0]; fnd = 1'b1;
end
end
end
next_ptr = {ii, jj};
end
endfunction
// generate the 64-bit content for block bi of lane bj, given message length Nv.
// do_fwd forwards a byte being written this same edge (index fidx -> value fval).
function automatic [63:0] gen_block(input [8:0] bi, input [1:0] bj,
input [13:0] Nv, input do_fwd,
input [13:0] fidx, input [7:0] fval);
reg [13:0] base; reg [1:0] rem; reg [13:0] L;
reg [10:0] q; reg [10:0] nb; reg [2:0] r;
reg [15:0] lbits;
reg [63:0] blk;
integer p;
reg [16:0] m;
reg [15:0] k;
reg [7:0] bval;
begin
base = Nv >> 2;
rem = Nv[1:0];
case (bj)
2'd0: L = base + ((rem > 2'd0) ? 14'd1 : 14'd0);
2'd1: L = base + ((rem > 2'd1) ? 14'd1 : 14'd0);
2'd2: L = base + ((rem > 2'd2) ? 14'd1 : 14'd0);
default: L = base;
endcase
q = L[13:3];
r = L[2:0];
nb = (r <= 3'd5) ? (q + 11'd1) : (q + 11'd2);
lbits = L << 3; // length in bits (16-bit)
blk = 64'd0;
for (p=0; p<8; p=p+1) begin
m = bi*8 + p;
if ((bi == (nb - 11'd1)) && (p >= 6)) begin
bval = (p == 6) ? lbits[15:8] : lbits[7:0];
end else if (m < L) begin
k = bj + 4*m;
bval = (do_fwd && (k == fidx)) ? fval : mem[k];
end else if (m == L) begin
bval = 8'h80;
end else begin
bval = 8'h00;
end
blk[(7-p)*8 +: 8] = bval; // earliest byte in [63:56]
end
gen_block = blk;
end
endfunction
// ---------------- lane geometry (from latched N) ----------------
wire [13:0] nbase = N >> 2;
wire [1:0] nrem = N[1:0];
wire [13:0] len0 = nbase + ((nrem > 2'd0) ? 14'd1 : 14'd0);
wire [13:0] len1 = nbase + ((nrem > 2'd1) ? 14'd1 : 14'd0);
wire [13:0] len2 = nbase + ((nrem > 2'd2) ? 14'd1 : 14'd0);
wire [13:0] len3 = nbase;
wire [10:0] nb0 = nblk(len0);
wire [10:0] nb1 = nblk(len1);
wire [10:0] nb2 = nblk(len2);
wire [10:0] nb3 = nblk(len3);
// final block = highest index (maxblocks-1), highest lane reaching it.
// lengths are non-increasing across lanes, so nb0 is the max.
wire [10:0] FI = nb0 - 11'd1;
wire [1:0] FJ = (nb3 == nb0) ? 2'd3 :
(nb2 == nb0) ? 2'd2 :
(nb1 == nb0) ? 2'd1 : 2'd0;
wire [10:0] nxt = next_ptr(curi, curj, nb0, nb1, nb2, nb3);
wire [8:0] nxti = nxt[10:2];
wire [1:0] nxtj = nxt[1:0];
// ---------------- sequential ----------------
always_ff @(posedge clk) begin
if (rst) begin
state <= RECV;
byte_ready_o <= 1'b1;
block_valid_o <= 1'b0;
done_o <= 1'b0;
busy_o <= 1'b0;
block_o <= 64'd0;
cnt <= 14'd0;
N <= 14'd0;
curi <= 9'd0;
curj <= 2'd0;
end else begin
case (state)
RECV: begin
if (byte_valid_i && byte_ready_o) begin
mem[cnt] <= byte_i;
busy_o <= 1'b1;
if (last_i) begin
// last byte accepted -> begin emitting blocks next cycle
N <= cnt + 14'd1;
state <= SEND;
byte_ready_o <= 1'b0;
curi <= 9'd0;
curj <= 2'd0;
block_valid_o <= 1'b1;
done_o <= 1'b0; // first block is never the final one (>=4 blocks)
block_o <= gen_block(9'd0, 2'd0, cnt + 14'd1, 1'b1, cnt, byte_i);
end else begin
cnt <= cnt + 14'd1;
end
end
end
SEND: begin
if (block_valid_o && block_ready_i) begin
if (done_o) begin
// final block accepted -> done
state <= RECV;
byte_ready_o <= 1'b1;
block_valid_o <= 1'b0;
busy_o <= 1'b0;
done_o <= 1'b0;
cnt <= 14'd0;
end else begin
curi <= nxti;
curj <= nxtj;
block_o <= gen_block(nxti, nxtj, N, 1'b0, 14'd0, 8'd0);
done_o <= (({2'd0, nxti} == FI) && (nxtj == FJ));
end
end
end
endcase
end
end
endmodule
Compile dut.sv for syntax check
iverilog -g2012 -o /tmp/syn.out dut.sv 2>&1 | head -40 && echo "COMPILE_EXIT=$?"
COMPILE_EXIT=0 [stdout] COMPILE_EXIT=0
module tb;
logic clk=0, rst=1, start_i=0, byte_valid_i=0, last_i=0, block_ready_i=0;
logic [7:0] byte_i=0;
logic [63:0] block_o;
logic block_valid_o, byte_ready_o, done_o, busy_o;
TopModule dut(.clk,.rst,.start_i,.byte_i,.byte_valid_i,.last_i,.block_ready_i,
.block_o,.block_valid_o,.byte_ready_o,.done_o,.busy_o);
always #5 clk = ~clk;
integer errors = 0;
integer seed = 1;
// golden reference for one message
reg [7:0] msg [0:20000];
reg [63:0] exp [0:8191];
integer nexp;
integer exp_final; // index of final block in exp
// per-lane scratch
reg [7:0] padded [0:3][0:9000];
integer padlen [0:3];
integer lblocks [0:3];
task build_golden(input integer N);
integer j,k,m,L,idx,i,maxb;
reg [15:0] lbits;
begin
for (j=0;j<4;j=j+1) begin
// gather lane bytes then pad
idx=0;
for (k=0;k<N;k=k+1) begin
if ((k%4)==j) begin
padded[j][idx]=msg[k]; idx=idx+1;
end
end
L=idx;
padded[j][idx]=8'h80; idx=idx+1;
while ((idx%8)!=6) begin padded[j][idx]=8'h00; idx=idx+1; end
lbits = L*8;
padded[j][idx]=lbits[15:8]; idx=idx+1;
padded[j][idx]=lbits[7:0]; idx=idx+1;
padlen[j]=idx;
lblocks[j]=idx/8;
end
maxb=lblocks[0];
for (j=1;j<4;j=j+1) if (lblocks[j]>maxb) maxb=lblocks[j];
// interleave
nexp=0;
for (i=0;i<maxb;i=i+1) begin
for (j=0;j<4;j=j+1) begin
if (i<lblocks[j]) begin
exp[nexp] = { padded[j][i*8+0],padded[j][i*8+1],padded[j][i*8+2],padded[j][i*8+3],
padded[j][i*8+4],padded[j][i*8+5],padded[j][i*8+6],padded[j][i*8+7] };
nexp=nexp+1;
end
end
end
exp_final=nexp-1;
end
endtask
// drive one message and check
integer got;
integer busy_seen_first;
task run_msg(input integer N);
integer k;
integer safety;
begin
build_golden(N);
got=0;
// feed bytes with random gaps
k=0;
while (k<N) begin
// randomly deassert valid
if (($random(seed)%3)==0) begin
byte_valid_i<=0; @(posedge clk);
end else begin
byte_i<=msg[k];
byte_valid_i<=1;
start_i<=(k==0);
last_i<=(k==N-1);
@(posedge clk);
if (byte_ready_o) begin
k=k+1;
end
end
end
byte_valid_i<=0; start_i<=0; last_i<=0;
// now receive blocks with random stalls
safety=0;
while (got<nexp && safety<200000) begin
block_ready_i<=($random(seed)%2);
@(posedge clk);
safety=safety+1;
if (block_valid_o && block_ready_i) begin
if (block_o !== exp[got]) begin
errors=errors+1;
$display("MISMATCH N=%0d block#%0d got=%h exp=%h",N,got,block_o,exp[got]);
end
// done_o must be high exactly when accepting final block
if ((got==nexp-1) && !done_o) begin
errors=errors+1; $display("DONE not high on final N=%0d",N);
end
if ((got!=nexp-1) && done_o) begin
errors=errors+1; $display("DONE high early N=%0d got=%0d",N,got);
end
got=got+1;
end
end
block_ready_i<=0;
if (got!=nexp) begin errors=errors+1; $display("BLOCKCOUNT N=%0d got=%0d exp=%0d",N,got,nexp); end
// a couple idle cycles, busy should drop
@(posedge clk);
if (busy_o) begin errors=errors+1; $display("BUSY stuck after N=%0d",N); end
if (!byte_ready_o) begin errors=errors+1; $display("byte_ready low idle after N=%0d",N); end
end
endtask
integer t, N, b;
initial begin
rst<=1; @(posedge clk); @(posedge clk); rst<=0; @(posedge clk);
// directed small lengths
for (N=1;N<=40;N=N+1) begin
for (b=0;b<N;b=b+1) msg[b]=($random(seed))&8'hff;
run_msg(N);
end
// random lengths incl larger
for (t=0;t<60;t=t+1) begin
N = 1 + ({$random(seed)}%800);
for (b=0;b<N;b=b+1) msg[b]=($random(seed))&8'hff;
run_msg(N);
end
// boundary lengths around multiples/6-7 mod
for (N=8188;N<=8191;N=N+1) begin
for (b=0;b<N;b=b+1) msg[b]=($random(seed))&8'hff;
run_msg(N);
end
if (errors==0) $display("ALL_PASS");
else $display("FAILED errors=%0d",errors);
$finish;
end
endmodule
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_0fce56bc7f294495. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.
Trial trial_0fce56bc7f294495 · verifier authoritative; classifier explanatory.