tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.rg --files
Chunk ID: 89b201 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 19 Output: sdiv_core/rtl/sdiv.sv sdiv_core/rtl/divp_pkg.sv sdiv_core/rtl/sdiv_top.sv
git status --short
Chunk ID: 33a42a Wall time: 0.0000 seconds Process exited with code 127 Original token count: 11 Output: /bin/bash: line 1: git: command not found
sed -n '1,220p' rtl/sdiv.sv
Chunk ID: 880bbc
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 811
Output:
//==============================================================================
// sdiv.sv
//
// Multi-cycle signed integer divider with a start/busy/valid handshake.
//
// ---------------------------------------------------------------------------
// >>> IMPLEMENTATION REQUIRED <<<
//
// The module ports, parameters and a small set of state registers are
// provided. The operand latch, the latency/handshake control and the signed
// result are left as a TODO and currently drive constant zeros, so the divider
// produces no useful result and the verifier FAILS.
//
// Implement the behaviour described in instruction.md. Do NOT change the
// module name, the port list, or the parameter list.
//
// iverilog 11 note: a bit/part-select of an EXPRESSION (a sum, a shift, a
// function-call result) is a syntax error under `iverilog -g2012`. Index only
// named signals, and do any bit work that needs an intermediate value inside a
// `function automatic` using named locals. Write negative full-scale constants
// as bit patterns (e.g. 16'h8000 for -32768), not as -16'sd32768.
// ---------------------------------------------------------------------------
//==============================================================================
`timescale 1ns/1ps
module sdiv #(
parameter W = 16,
parameter N = 16
) (
input logic clk,
input logic rst_n,
input logic start,
input logic signed [W-1:0] dividend,
input logic signed [W-1:0] divisor,
output logic signed [W-1:0] quotient,
output logic signed [W-1:0] remainder,
output logic busy,
output logic valid
);
// ---------------------------------------------------------------------------
// State registers (provided). Latch the operands here on an accepted start and
// track the in-flight progress with the counter.
// ---------------------------------------------------------------------------
logic signed [W-1:0] a_q; // latched dividend
logic signed [W-1:0] b_q; // latched divisor
logic [7:0] cnt; // in-flight progress
logic run; // a divide is in progress
// ===========================================================================
// TODO: IMPLEMENT THE DIVIDER.
// * accept a start only when not busy; latch dividend/divisor at that edge;
// * after the fixed latency, present the signed quotient/remainder and pulse
// valid for one clock, with busy and valid never overlapping;
// * asynchronous active-low reset clears all state and all outputs.
//
// The placeholder below keeps the module compilable but INCORRECT.
// ===========================================================================
always_ff @(posedge clk or negedge rst_n) begin
if (!rst_n) begin
a_q <= '0;
b_q <= '0;
cnt <= 8'd0;
run <= 1'b0;
busy <= 1'b0;
valid <= 1'b0;
quotient <= '0;
remainder <= '0;
end else begin
// TODO: replace with the real latch + latency control + result.
run <= run;
cnt <= cnt;
end
end
endmodule : sdiv
sed -n '1,220p' rtl/divp_pkg.sv
Chunk ID: 707625 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 303 Output: //============================================================================== // divp_pkg.sv // // Shared geometry and constants for the multi-cycle signed divider. The block // latches a signed dividend/divisor on an accepted start and produces a signed // quotient/remainder after a fixed number of clocks, with a start/busy/valid // handshake. Parameters are declared without an explicit data type for broad // simulator compatibility (Icarus Verilog 11); they default to integer // constants, which is sufficient here. // // DO NOT change this file. //============================================================================== `ifndef DIVP_PKG_SV `define DIVP_PKG_SV package divp_pkg; localparam W = 16; // operand / result word width (signed two's comp) localparam N = 16; // result latency: clocks from accept to valid // Defined divide-by-zero outputs (divisor == 0). Written as raw bit patterns // because the negative saturation value is the most-negative 16-bit number. localparam DIV0_Q_POS = 16'h7FFF; // 32767, used when dividend >= 0 localparam DIV0_Q_NEG = 16'h8000; // -32768, used when dividend < 0 endpackage : divp_pkg `endif // DIVP_PKG_SV
sed -n '1,220p' rtl/sdiv_top.sv
Chunk ID: 3272be
Wall time: 0.0001 seconds
Process exited with code 0
Original token count: 346
Output:
//==============================================================================
// sdiv_top.sv
//
// Thin integration wrapper. The verification environment drives this wrapper so
// that the instantiation wiring is exercised alongside the divider itself. It
// instantiates sdiv with the project-default geometry from divp_pkg.
//
// DO NOT change this file.
//==============================================================================
`timescale 1ns/1ps
`include "divp_pkg.sv"
module sdiv_top (
input logic clk,
input logic rst_n,
input logic start,
input logic signed [divp_pkg::W-1:0] dividend,
input logic signed [divp_pkg::W-1:0] divisor,
output logic signed [divp_pkg::W-1:0] quotient,
output logic signed [divp_pkg::W-1:0] remainder,
output logic busy,
output logic valid
);
// Bare instantiation: the divider carries its own default geometry, so a
// submission needs no parameter override to elaborate correctly.
sdiv u_sdiv (
.clk (clk),
.rst_n (rst_n),
.start (start),
.dividend (dividend),
.divisor (divisor),
.quotient (quotient),
.remainder (remainder),
.busy (busy),
.valid (valid)
);
endmodule : sdiv_top
find . -maxdepth 3 -type f -print
Chunk ID: 1f0efb Wall time: 0.0000 seconds Process exited with code 0 Original token count: 13 Output: ./rtl/sdiv_top.sv ./rtl/divp_pkg.sv ./rtl/sdiv.sv
*** Begin Patch
*** Update File: /work/sdiv_core/rtl/sdiv.sv
@@
logic signed [W-1:0] a_q; // latched dividend
logic signed [W-1:0] b_q; // latched divisor
logic [7:0] cnt; // in-flight progress
logic run; // a divide is in progress
- // ===========================================================================
- // TODO: IMPLEMENT THE DIVIDER.
- // * accept a start only when not busy; latch dividend/divisor at that edge;
- // * after the fixed latency, present the signed quotient/remainder and pulse
- // valid for one clock, with busy and valid never overlapping;
- // * asynchronous active-low reset clears all state and all outputs.
- //
- // The placeholder below keeps the module compilable but INCORRECT.
- // ===========================================================================
+ localparam logic signed [W-1:0] MIN_VALUE = {1'b1, {(W-1){1'b0}}};
+ localparam logic signed [W-1:0] MAX_VALUE = {1'b0, {(W-1){1'b1}}};
+ localparam logic signed [W-1:0] NEG_ONE = {W{1'b1}};
+ localparam logic signed [W-1:0] ONE_VALUE = {{(W-1){1'b0}}, 1'b1};
+
+ function automatic logic signed [W-1:0] floor_quotient(
+ input logic signed [W-1:0] a,
+ input logic signed [W-1:0] b
+ );
+ logic signed [W-1:0] q_trunc;
+ logic signed [W-1:0] r_trunc;
+ begin
+ if (b == '0) begin
+ if (a[W-1]) begin
+ floor_quotient = MIN_VALUE;
+ end else begin
+ floor_quotient = MAX_VALUE;
+ end
+ end else if ((a == MIN_VALUE) && (b == NEG_ONE)) begin
+ floor_quotient = MAX_VALUE;
+ end else begin
+ q_trunc = a / b;
+ r_trunc = a % b;
+ if ((r_trunc != '0) && (a[W-1] ^ b[W-1])) begin
+ floor_quotient = q_trunc - ONE_VALUE;
+ end else begin
+ floor_quotient = q_trunc;
+ end
+ end
+ end
+ endfunction
+
+ function automatic logic signed [W-1:0] floor_remainder(
+ input logic signed [W-1:0] a,
+ input logic signed [W-1:0] b
+ );
+ logic signed [W-1:0] r_trunc;
+ begin
+ if (b == '0) begin
+ floor_remainder = a;
+ end else if ((a == MIN_VALUE) && (b == NEG_ONE)) begin
+ floor_remainder = '0;
+ end else begin
+ r_trunc = a % b;
+ if ((r_trunc != '0) && (a[W-1] ^ b[W-1])) begin
+ floor_remainder = r_trunc + b;
+ end else begin
+ floor_remainder = r_trunc;
+ end
+ end
+ end
+ endfunction
+
always_ff @(posedge clk or negedge rst_n) begin
if (!rst_n) begin
a_q <= '0;
b_q <= '0;
@@
quotient <= '0;
remainder <= '0;
end else begin
- // TODO: replace with the real latch + latency control + result.
- run <= run;
- cnt <= cnt;
+ valid <= 1'b0;
+
+ if (run) begin
+ if (cnt == N[7:0]) begin
+ run <= 1'b0;
+ cnt <= 8'd0;
+ busy <= 1'b0;
+ valid <= 1'b1;
+ quotient <= floor_quotient(a_q, b_q);
+ remainder <= floor_remainder(a_q, b_q);
+ end else begin
+ cnt <= cnt + 8'd1;
+ busy <= 1'b1;
+ end
+ end else if (start) begin
+ a_q <= dividend;
+ b_q <= divisor;
+ cnt <= 8'd1;
+ run <= 1'b1;
+ busy <= 1'b0;
+ end else begin
+ cnt <= 8'd0;
+ busy <= 1'b0;
+ end
end
end
endmodule : sdiv
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
M /work/sdiv_core/rtl/sdiv.sv
*** Begin Patch
*** Update File: /work/sdiv_core/rtl/sdiv.sv
@@
localparam logic signed [W-1:0] MIN_VALUE = {1'b1, {(W-1){1'b0}}};
localparam logic signed [W-1:0] MAX_VALUE = {1'b0, {(W-1){1'b1}}};
localparam logic signed [W-1:0] NEG_ONE = {W{1'b1}};
localparam logic signed [W-1:0] ONE_VALUE = {{(W-1){1'b0}}, 1'b1};
+ localparam logic [7:0] N_COUNT = N;
@@
valid <= 1'b0;
if (run) begin
- if (cnt == N[7:0]) begin
+ if (cnt == N_COUNT) begin
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
M /work/sdiv_core/rtl/sdiv.sv
iverilog -g2012 -Wall -I rtl -o /tmp/sdiv_elab.vvp rtl/sdiv.sv rtl/sdiv_top.sv
Chunk ID: e5811f Wall time: 0.0000 seconds Process exited with code 0 Original token count: 35 Output: rtl/divp_pkg.sv:16: warning: timescale for divp_pkg inherited from another file. rtl/sdiv_top.sv:10: ...: The inherited timescale is here.
sed -n '1,240p' rtl/sdiv.sv
Chunk ID: 8634b1
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 1202
Output:
//==============================================================================
// sdiv.sv
//
// Multi-cycle signed integer divider with a start/busy/valid handshake.
//
// ---------------------------------------------------------------------------
// >>> IMPLEMENTATION REQUIRED <<<
//
// The module ports, parameters and a small set of state registers are
// provided. The operand latch, the latency/handshake control and the signed
// result are left as a TODO and currently drive constant zeros, so the divider
// produces no useful result and the verifier FAILS.
//
// Implement the behaviour described in instruction.md. Do NOT change the
// module name, the port list, or the parameter list.
//
// iverilog 11 note: a bit/part-select of an EXPRESSION (a sum, a shift, a
// function-call result) is a syntax error under `iverilog -g2012`. Index only
// named signals, and do any bit work that needs an intermediate value inside a
// `function automatic` using named locals. Write negative full-scale constants
// as bit patterns (e.g. 16'h8000 for -32768), not as -16'sd32768.
// ---------------------------------------------------------------------------
//==============================================================================
`timescale 1ns/1ps
module sdiv #(
parameter W = 16,
parameter N = 16
) (
input logic clk,
input logic rst_n,
input logic start,
input logic signed [W-1:0] dividend,
input logic signed [W-1:0] divisor,
output logic signed [W-1:0] quotient,
output logic signed [W-1:0] remainder,
output logic busy,
output logic valid
);
// ---------------------------------------------------------------------------
// State registers (provided). Latch the operands here on an accepted start and
// track the in-flight progress with the counter.
// ---------------------------------------------------------------------------
logic signed [W-1:0] a_q; // latched dividend
logic signed [W-1:0] b_q; // latched divisor
logic [7:0] cnt; // in-flight progress
logic run; // a divide is in progress
localparam logic signed [W-1:0] MIN_VALUE = {1'b1, {(W-1){1'b0}}};
localparam logic signed [W-1:0] MAX_VALUE = {1'b0, {(W-1){1'b1}}};
localparam logic signed [W-1:0] NEG_ONE = {W{1'b1}};
localparam logic signed [W-1:0] ONE_VALUE = {{(W-1){1'b0}}, 1'b1};
localparam logic [7:0] N_COUNT = N;
function automatic logic signed [W-1:0] floor_quotient(
input logic signed [W-1:0] a,
input logic signed [W-1:0] b
);
logic signed [W-1:0] q_trunc;
logic signed [W-1:0] r_trunc;
begin
if (b == '0) begin
if (a[W-1]) begin
floor_quotient = MIN_VALUE;
end else begin
floor_quotient = MAX_VALUE;
end
end else if ((a == MIN_VALUE) && (b == NEG_ONE)) begin
floor_quotient = MAX_VALUE;
end else begin
q_trunc = a / b;
r_trunc = a % b;
if ((r_trunc != '0) && (a[W-1] ^ b[W-1])) begin
floor_quotient = q_trunc - ONE_VALUE;
end else begin
floor_quotient = q_trunc;
end
end
end
endfunction
function automatic logic signed [W-1:0] floor_remainder(
input logic signed [W-1:0] a,
input logic signed [W-1:0] b
);
logic signed [W-1:0] r_trunc;
begin
if (b == '0) begin
floor_remainder = a;
end else if ((a == MIN_VALUE) && (b == NEG_ONE)) begin
floor_remainder = '0;
end else begin
r_trunc = a % b;
if ((r_trunc != '0) && (a[W-1] ^ b[W-1])) begin
floor_remainder = r_trunc + b;
end else begin
floor_remainder = r_trunc;
end
end
end
endfunction
always_ff @(posedge clk or negedge rst_n) begin
if (!rst_n) begin
a_q <= '0;
b_q <= '0;
cnt <= 8'd0;
run <= 1'b0;
busy <= 1'b0;
valid <= 1'b0;
quotient <= '0;
remainder <= '0;
end else begin
valid <= 1'b0;
if (run) begin
if (cnt == N_COUNT) begin
run <= 1'b0;
cnt <= 8'd0;
busy <= 1'b0;
valid <= 1'b1;
quotient <= floor_quotient(a_q, b_q);
remainder <= floor_remainder(a_q, b_q);
end else begin
cnt <= cnt + 8'd1;
busy <= 1'b1;
end
end else if (start) begin
a_q <= dividend;
b_q <= divisor;
cnt <= 8'd1;
run <= 1'b1;
busy <= 1'b0;
end else begin
cnt <= 8'd0;
busy <= 1'b0;
end
end
end
endmodule : sdiv
*** Begin Patch
*** Add File: /work/sdiv_core/tmp_sdiv_tb.sv
+`timescale 1ns/1ps
+
+module tmp_sdiv_tb;
+ localparam int W = 16;
+ localparam int N = 16;
+
+ logic clk;
+ logic rst_n;
+ logic start;
+ logic signed [W-1:0] dividend;
+ logic signed [W-1:0] divisor;
+ logic signed [W-1:0] quotient;
+ logic signed [W-1:0] remainder;
+ logic busy;
+ logic valid;
+
+ int errors;
+
+ sdiv dut (
+ .clk(clk),
+ .rst_n(rst_n),
+ .start(start),
+ .dividend(dividend),
+ .divisor(divisor),
+ .quotient(quotient),
+ .remainder(remainder),
+ .busy(busy),
+ .valid(valid)
+ );
+
+ initial begin
+ clk = 1'b0;
+ forever #5 clk = ~clk;
+ end
+
+ function automatic logic signed [W-1:0] ref_q(
+ input logic signed [W-1:0] a,
+ input logic signed [W-1:0] b
+ );
+ integer ai;
+ integer bi;
+ integer qi;
+ integer ri;
+ begin
+ ai = a;
+ bi = b;
+ if (bi == 0) begin
+ qi = (ai < 0) ? -32768 : 32767;
+ end else if ((ai == -32768) && (bi == -1)) begin
+ qi = 32767;
+ end else begin
+ qi = ai / bi;
+ ri = ai % bi;
+ if ((ri != 0) && ((ai < 0) != (bi < 0))) begin
+ qi = qi - 1;
+ end
+ end
+ ref_q = qi[W-1:0];
+ end
+ endfunction
+
+ function automatic logic signed [W-1:0] ref_r(
+ input logic signed [W-1:0] a,
+ input logic signed [W-1:0] b
+ );
+ integer ai;
+ integer bi;
+ integer ri;
+ begin
+ ai = a;
+ bi = b;
+ if (bi == 0) begin
+ ri = ai;
+ end else if ((ai == -32768) && (bi == -1)) begin
+ ri = 0;
+ end else begin
+ ri = ai % bi;
+ if ((ri != 0) && ((ai < 0) != (bi < 0))) begin
+ ri = ri + bi;
+ end
+ end
+ ref_r = ri[W-1:0];
+ end
+ endfunction
+
+ task automatic check_div(
+ input logic signed [W-1:0] a,
+ input logic signed [W-1:0] b
+ );
+ int i;
+ begin
+ @(negedge clk);
+ dividend = a;
+ divisor = b;
+ start = 1'b1;
+ @(posedge clk);
+ #1;
+ if (busy !== 1'b0 || valid !== 1'b0) begin
+ $display("accept edge handshake mismatch a=%0d b=%0d busy=%0b valid=%0b", a, b, busy, valid);
+ errors++;
+ end
+ @(negedge clk);
+ start = 1'b0;
+ dividend = 16'sd12345;
+ divisor = -16'sd7;
+ for (i = 1; i < N; i++) begin
+ @(posedge clk);
+ #1;
+ if (busy !== 1'b1 || valid !== 1'b0) begin
+ $display("busy window mismatch i=%0d a=%0d b=%0d busy=%0b valid=%0b", i, a, b, busy, valid);
+ errors++;
+ end
+ if (i == 3) begin
+ @(negedge clk);
+ start = 1'b1;
+ dividend = -16'sd222;
+ divisor = 16'sd5;
+ @(negedge clk);
+ start = 1'b0;
+ end
+ end
+ @(posedge clk);
+ #1;
+ if (busy !== 1'b0 || valid !== 1'b1 || quotient !== ref_q(a, b) || remainder !== ref_r(a, b)) begin
+ $display("result mismatch a=%0d b=%0d busy=%0b valid=%0b q=%0d/%0d r=%0d/%0d",
+ a, b, busy, valid, quotient, ref_q(a, b), remainder, ref_r(a, b));
+ errors++;
+ end
+ @(posedge clk);
+ #1;
+ if (valid !== 1'b0) begin
+ $display("valid held high a=%0d b=%0d", a, b);
+ errors++;
+ end
+ end
+ endtask
+
+ initial begin
+ errors = 0;
+ rst_n = 1'b0;
+ start = 1'b0;
+ dividend = '0;
+ divisor = '0;
+ #2;
+ if (busy !== 1'b0 || valid !== 1'b0 || quotient !== '0 || remainder !== '0) begin
+ $display("async reset output mismatch");
+ errors++;
+ end
+ repeat (2) @(posedge clk);
+ @(negedge clk);
+ rst_n = 1'b1;
+
+ check_div(16'sd7, 16'sd3);
+ check_div(-16'sd7, 16'sd3);
+ check_div(16'sd7, -16'sd3);
+ check_div(-16'sd7, -16'sd3);
+ check_div(16'sd7, 16'sd0);
+ check_div(-16'sd7, 16'sd0);
+ check_div(16'h8000, -16'sd1);
+ check_div(16'h8000, 16'sd32767);
+
+ if (errors == 0) begin
+ $display("PASS");
+ end else begin
+ $display("FAIL errors=%0d", errors);
+ end
+ $finish;
+ end
+endmodule
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
A /work/sdiv_core/tmp_sdiv_tb.sv
iverilog -g2012 -Wall -I rtl -o /tmp/sdiv_tb.vvp rtl/sdiv.sv tmp_sdiv_tb.sv && vvp /tmp/sdiv_tb.vvp
Chunk ID: 07a383 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 226 Output: busy window mismatch i=15 a=7 b=3 busy=0 valid=1 result mismatch a=7 b=3 busy=0 valid=0 q=2/2 r=1/1 busy window mismatch i=15 a=-7 b=3 busy=0 valid=1 result mismatch a=-7 b=3 busy=0 valid=0 q=-3/-3 r=2/2 busy window mismatch i=15 a=7 b=-3 busy=0 valid=1 result mismatch a=7 b=-3 busy=0 valid=0 q=-3/-3 r=-2/-2 busy window mismatch i=15 a=-7 b=-3 busy=0 valid=1 result mismatch a=-7 b=-3 busy=0 valid=0 q=2/2 r=-1/-1 busy window mismatch i=15 a=7 b=0 busy=0 valid=1 result mismatch a=7 b=0 busy=0 valid=0 q=32767/32767 r=7/7 busy window mismatch i=15 a=-7 b=0 busy=0 valid=1 result mismatch a=-7 b=0 busy=0 valid=0 q=-32768/-32768 r=-7/-7 busy window mismatch i=15 a=-32768 b=-1 busy=0 valid=1 result mismatch a=-32768 b=-1 busy=0 valid=0 q=32767/32767 r=0/0 busy window mismatch i=15 a=-32768 b=32767 busy=0 valid=1 result mismatch a=-32768 b=32767 busy=0 valid=0 q=-2/-2 r=32766/32766 FAIL errors=16
*** Begin Patch
*** Update File: /work/sdiv_core/tmp_sdiv_tb.sv
@@
@(posedge clk);
#1;
if (busy !== 1'b0 || valid !== 1'b0) begin
$display("accept edge handshake mismatch a=%0d b=%0d busy=%0b valid=%0b", a, b, busy, valid);
errors++;
end
- @(negedge clk);
- start = 1'b0;
- dividend = 16'sd12345;
- divisor = -16'sd7;
- for (i = 1; i < N; i++) begin
+ for (i = 1; i <= N; i++) begin
+ @(negedge clk);
+ if (i == 1) begin
+ start = 1'b1;
+ dividend = -16'sd222;
+ divisor = 16'sd5;
+ end else begin
+ start = 1'b0;
+ dividend = 16'sd12345;
+ divisor = -16'sd7;
+ end
@(posedge clk);
#1;
- if (busy !== 1'b1 || valid !== 1'b0) begin
- $display("busy window mismatch i=%0d a=%0d b=%0d busy=%0b valid=%0b", i, a, b, busy, valid);
- errors++;
- end
- if (i == 3) begin
- @(negedge clk);
- start = 1'b1;
- dividend = -16'sd222;
- divisor = 16'sd5;
- @(negedge clk);
- start = 1'b0;
+ if (i < N) begin
+ if (busy !== 1'b1 || valid !== 1'b0) begin
+ $display("busy window mismatch i=%0d a=%0d b=%0d busy=%0b valid=%0b", i, a, b, busy, valid);
+ errors++;
+ end
+ end else begin
+ if (busy !== 1'b0 || valid !== 1'b1 || quotient !== ref_q(a, b) || remainder !== ref_r(a, b)) begin
+ $display("result mismatch a=%0d b=%0d busy=%0b valid=%0b q=%0d/%0d r=%0d/%0d",
+ a, b, busy, valid, quotient, ref_q(a, b), remainder, ref_r(a, b));
+ errors++;
+ end
end
end
- @(posedge clk);
- #1;
- if (busy !== 1'b0 || valid !== 1'b1 || quotient !== ref_q(a, b) || remainder !== ref_r(a, b)) begin
- $display("result mismatch a=%0d b=%0d busy=%0b valid=%0b q=%0d/%0d r=%0d/%0d",
- a, b, busy, valid, quotient, ref_q(a, b), remainder, ref_r(a, b));
- errors++;
- end
@(posedge clk);
#1;
if (valid !== 1'b0) begin
*** End Patch
Exit code: 0
Wall time: 0 seconds
Output:
Success. Updated the following files:
M /work/sdiv_core/tmp_sdiv_tb.sv
iverilog -g2012 -Wall -I rtl -o /tmp/sdiv_tb.vvp rtl/sdiv.sv tmp_sdiv_tb.sv && vvp /tmp/sdiv_tb.vvp
Chunk ID: e50745 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 2 Output: PASS
*** Begin Patch *** Delete File: /work/sdiv_core/tmp_sdiv_tb.sv *** End Patch Exit code: 0 Wall time: 0 seconds Output: Success. Updated the following files: D /work/sdiv_core/tmp_sdiv_tb.sv
iverilog -g2012 -Wall -I rtl -o /tmp/sdiv_elab_topfirst.vvp rtl/sdiv_top.sv rtl/sdiv.sv
Chunk ID: 2690be Wall time: 0.0000 seconds Process exited with code 0 Original token count: 35 Output: rtl/divp_pkg.sv:16: warning: timescale for divp_pkg inherited from another file. rtl/sdiv_top.sv:10: ...: The inherited timescale is here.
find . -maxdepth 2 -type f -print
Chunk ID: 4b65c8 Wall time: 0.0000 seconds Process exited with code 0 Original token count: 13 Output: ./rtl/sdiv_top.sv ./rtl/divp_pkg.sv ./rtl/sdiv.sv
nl -ba rtl/sdiv.sv | sed -n '1,220p'
Chunk ID: 0bef71
Wall time: 0.0000 seconds
Process exited with code 0
Original token count: 1450
Output:
1 //==============================================================================
2 // sdiv.sv
3 //
4 // Multi-cycle signed integer divider with a start/busy/valid handshake.
5 //
6 // ---------------------------------------------------------------------------
7 // >>> IMPLEMENTATION REQUIRED <<<
8 //
9 // The module ports, parameters and a small set of state registers are
10 // provided. The operand latch, the latency/handshake control and the signed
11 // result are left as a TODO and currently drive constant zeros, so the divider
12 // produces no useful result and the verifier FAILS.
13 //
14 // Implement the behaviour described in instruction.md. Do NOT change the
15 // module name, the port list, or the parameter list.
16 //
17 // iverilog 11 note: a bit/part-select of an EXPRESSION (a sum, a shift, a
18 // function-call result) is a syntax error under `iverilog -g2012`. Index only
19 // named signals, and do any bit work that needs an intermediate value inside a
20 // `function automatic` using named locals. Write negative full-scale constants
21 // as bit patterns (e.g. 16'h8000 for -32768), not as -16'sd32768.
22 // ---------------------------------------------------------------------------
23 //==============================================================================
24 `timescale 1ns/1ps
25
26 module sdiv #(
27 parameter W = 16,
28 parameter N = 16
29 ) (
30 input logic clk,
31 input logic rst_n,
32 input logic start,
33 input logic signed [W-1:0] dividend,
34 input logic signed [W-1:0] divisor,
35 output logic signed [W-1:0] quotient,
36 output logic signed [W-1:0] remainder,
37 output logic busy,
38 output logic valid
39 );
40
41 // ---------------------------------------------------------------------------
42 // State registers (provided). Latch the operands here on an accepted start and
43 // track the in-flight progress with the counter.
44 // ---------------------------------------------------------------------------
45 logic signed [W-1:0] a_q; // latched dividend
46 logic signed [W-1:0] b_q; // latched divisor
47 logic [7:0] cnt; // in-flight progress
48 logic run; // a divide is in progress
49
50 localparam logic signed [W-1:0] MIN_VALUE = {1'b1, {(W-1){1'b0}}};
51 localparam logic signed [W-1:0] MAX_VALUE = {1'b0, {(W-1){1'b1}}};
52 localparam logic signed [W-1:0] NEG_ONE = {W{1'b1}};
53 localparam logic signed [W-1:0] ONE_VALUE = {{(W-1){1'b0}}, 1'b1};
54 localparam logic [7:0] N_COUNT = N;
55
56 function automatic logic signed [W-1:0] floor_quotient(
57 input logic signed [W-1:0] a,
58 input logic signed [W-1:0] b
59 );
60 logic signed [W-1:0] q_trunc;
61 logic signed [W-1:0] r_trunc;
62 begin
63 if (b == '0) begin
64 if (a[W-1]) begin
65 floor_quotient = MIN_VALUE;
66 end else begin
67 floor_quotient = MAX_VALUE;
68 end
69 end else if ((a == MIN_VALUE) && (b == NEG_ONE)) begin
70 floor_quotient = MAX_VALUE;
71 end else begin
72 q_trunc = a / b;
73 r_trunc = a % b;
74 if ((r_trunc != '0) && (a[W-1] ^ b[W-1])) begin
75 floor_quotient = q_trunc - ONE_VALUE;
76 end else begin
77 floor_quotient = q_trunc;
78 end
79 end
80 end
81 endfunction
82
83 function automatic logic signed [W-1:0] floor_remainder(
84 input logic signed [W-1:0] a,
85 input logic signed [W-1:0] b
86 );
87 logic signed [W-1:0] r_trunc;
88 begin
89 if (b == '0) begin
90 floor_remainder = a;
91 end else if ((a == MIN_VALUE) && (b == NEG_ONE)) begin
92 floor_remainder = '0;
93 end else begin
94 r_trunc = a % b;
95 if ((r_trunc != '0) && (a[W-1] ^ b[W-1])) begin
96 floor_remainder = r_trunc + b;
97 end else begin
98 floor_remainder = r_trunc;
99 end
100 end
101 end
102 endfunction
103
104 always_ff @(posedge clk or negedge rst_n) begin
105 if (!rst_n) begin
106 a_q <= '0;
107 b_q <= '0;
108 cnt <= 8'd0;
109 run <= 1'b0;
110 busy <= 1'b0;
111 valid <= 1'b0;
112 quotient <= '0;
113 remainder <= '0;
114 end else begin
115 valid <= 1'b0;
116
117 if (run) begin
118 if (cnt == N_COUNT) begin
119 run <= 1'b0;
120 cnt <= 8'd0;
121 busy <= 1'b0;
122 valid <= 1'b1;
123 quotient <= floor_quotient(a_q, b_q);
124 remainder <= floor_remainder(a_q, b_q);
125 end else begin
126 cnt <= cnt + 8'd1;
127 busy <= 1'b1;
128 end
129 end else if (start) begin
130 a_q <= dividend;
131 b_q <= divisor;
132 cnt <= 8'd1;
133 run <= 1'b1;
134 busy <= 1'b0;
135 end else begin
136 cnt <= 8'd0;
137 busy <= 1'b0;
138 end
139 end
140 end
141
142 endmodule : sdiv
*** Begin Patch *** Update File: /work/sdiv_core/rtl/sdiv.sv @@ -// >>> IMPLEMENTATION REQUIRED <<< -// -// The module ports, parameters and a small set of state registers are -// provided. The operand latch, the latency/handshake control and the signed -// result are left as a TODO and currently drive constant zeros, so the divider -// produces no useful result and the verifier FAILS. -// -// Implement the behaviour described in instruction.md. Do NOT change the -// module name, the port list, or the parameter list. -// // iverilog 11 note: a bit/part-select of an EXPRESSION (a sum, a shift, a // function-call result) is a syntax error under `iverilog -g2012`. Index only // named signals, and do any bit work that needs an intermediate value inside a *** End Patch Exit code: 0 Wall time: 0 seconds Output: Success. Updated the following files: M /work/sdiv_core/rtl/sdiv.sv
iverilog -g2012 -Wall -I rtl -o /tmp/sdiv_elab_final.vvp rtl/sdiv_top.sv rtl/sdiv.sv
Chunk ID: d951bb Wall time: 0.0000 seconds Process exited with code 0 Original token count: 35 Output: rtl/divp_pkg.sv:16: warning: timescale for divp_pkg inherited from another file. rtl/sdiv_top.sv:10: ...: The inherited timescale is here.
No file changes, the agent left the workspace untouched.
Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_f431ac01bdbb48be. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.
Trial trial_f431ac01bdbb48be · verifier authoritative; classifier explanatory.