raygentop → comb_mult_add_16_mode · 20260913-195430-d2386a
benchadapt adaptation run · record at outputs/adapt/vtr_demo/raygentop/comb_mult_add_16_mode/20260913-195430-d2386a
- run id
20260913-195430-d2386a- started
- 2026-09-13 19:54:30 -0700
- finished
- 2026-09-13 20:01:03 -0700
- suite / design
- vtr_demo / raygentop
- target mode
comb_mult_add_16_mode- tier
- needs restructuring (T2) — the region did not fit the mode as is
- outcome
- ACCEPTED — reviewer agent confirmed
- editor attempts
- 1 (editor calls against the one approved plan; record field
iterations) - wall clock
- 6m 33s (agents 5m 49s, VTR and other 43s) [392.6 s total; 'other' is synthesis-only checks and framework time between calls]
- models per role
- planner:
anthropic/claude-opus-5
reviewer:plan:anthropic/claude-opus-5
editor:anthropic/claude-opus-5
reviewer:acceptance:anthropic/claude-opus-5 - VPR arguments
- channel width 300 · device koios_extra_small · seed 1 (from run.json)
- repo commit
439a0fe3b51bwith uncommitted changes to tracked files- sandbox
- bubblewrap (recorded per agent call, before the run-level field existed: every call in this run ran in its own mount namespace)
- agent reads
- none outside the agents' own working directories (paths each agent named outside its own working directory, computed from the tool events; its own scratch excluded)
- prompt set
cea07cb25821(sha256 over 6 templates in src/agents and 10 inline pieces; full value in run.jsonprompt_set)
Mode contract
Verbatim, as recorded with the run and sent to the agents.
Hard-block primitive to instantiate: `comb_mult_add_16` (precision INT16) computes: out = ax*ay + bx input ports: ax[16], ay[16], bx[32] output ports: result[64] arithmetic: the block's operands and result are signed two's complement. A design operand narrower than its port must be widened to the port width: zero-extended if the design treats it as unsigned, sign-extended if signed. An unsigned design operand as wide as its port has no exact representation on this block. timing: the block is combinational; `result` is valid in the same cycle the inputs are applied (no clock port). Wire EVERY operand of the fused region onto the input ports (name them exactly as above); drive the region's real consumer from the output port. Tie unused term ports to 0. Do not leave input ports unconnected.
Agent calls
Call 1 · planner · anthropic/claude-opus-5 · ok
You are the Planner. Choose the best region(s) in raygentop.v to adapt so hard-block mode
'comb_mult_add_16_mode' (Hard-block primitive to instantiate: comb_mult_add_16 (precision INT16)
computes: out = ax*ay + bx
input ports: ax[16], ay[16], bx[32]
output ports: result[64]
arithmetic: the block's operands and result are signed two's complement. A design operand narrower than its port must be widened to the port width: zero-extended if the design treats it as unsigned, sign-extended if signed. An unsigned design operand as wide as its port has no exact representation on this block.
timing: the block is combinational; result is valid in the same cycle the inputs are applied (no clock port).
Wire EVERY operand of the fused region onto the input ports (name them exactly as above); drive the region's real consumer from the output port. Tie unused term ports to 0. Do not leave input ports unconnected.) is exercised, then write a concrete plan. Do NOT edit files —
output the header + plan only.
Pick the most REPRESENTATIVE mapping — arithmetic a real designer of THIS workload would actually
map to 'comb_mult_add_16_mode', never fabricated computation. For a sum-of-products / MAC mode you must
find product terms that ALREADY feed a COMMON reduction (a shared sum/accumulator); products that
feed SEPARATE outputs (e.g. distinct systolic-array elements) must NOT be fused. An isolated scalar
multiply is NOT a representative sum-of-products target. If nothing representative exists, outputTIER: NONE.
Candidate arithmetic regions (id | operation | instances):
bilinearintrp.$mul$raygentop.v:2874$348 | multiply | 1
bilinearintrp.$mul$raygentop.v:2875$349 | multiply | 1
bilinearintrp.$mul$raygentop.v:2876$350 | multiply | 1
bilinearintrp.$mul$raygentop.v:2877$351 | multiply | 1
bilinearintrp.$mul$raygentop.v:2878$352 | multiply | 1
bilinearintrp.$mul$raygentop.v:2879$353 | multiply | 1
bilinearintrp.$mul$raygentop.v:2880$354 | multiply | 1
bilinearintrp.$mul$raygentop.v:2881$355 | multiply | 1
bilinearintrp.$mul$raygentop.v:2882$356 | multiply | 1
matmult.$mul$raygentop.v:335$15 | multiply | 1
matmult.$mul$raygentop.v:336$16 | multiply | 1
matmult.$mul$raygentop.v:337$17 | multiply | 1
matmult.$mul$raygentop.v:338$18 | multiply | 1
matmult.$mul$raygentop.v:339$19 | multiply | 1
matmult.$mul$raygentop.v:340$20 | multiply | 1
matmult.$mul$raygentop.v:341$21 | multiply | 1
matmult.$mul$raygentop.v:342$22 | multiply | 1
matmult.$mul$raygentop.v:343$23 | multiply | 1
Classify the tier of the change you propose (a datatype/algorithm variant, T3, is out of scope —
do not propose one):
- T1: Direct replacement: no change to the computed function or surrounding structure; no datatype change.
- T2: Local restructuring only; preserve the region's function, role, and live consumers; no new operation/datatype family.
Read the source. Output EXACTLY this header (uppercase keys), then the plan:
TIER: T1 | T2 | NONE
REGIONS: <comma-separated region id(s)> # one id for a direct swap; N ids for a fusion
SHARED_REDUCTION: <the signal/module the terms feed> # or NONE for a single region
MAPPING: <which operands map to which of the mode's ports>
PLAN: <how the module's live inputs/outputs and downstream consumers are preserved; any introduced
operations/datatypes (should be NONE for T1/T2); and the main risks>
Output rules: no preamble before the TIER line — read the source first, then write. You
are one step of an automated pipeline: a reviewer runs automatically on this plan, you
cannot invoke it, and no human reads your output, so do not end with a question or an
offer.
Read these files in this directory: raygentop.v
1 paragraph break restored by the export, where the recorder joined text blocks with no separator.
I'll read the source first.
TIER: T2
REGIONS: bilinearintrp.$mul$raygentop.v:2874$348, bilinearintrp.$mul$raygentop.v:2875$349, bilinearintrp.$mul$raygentop.v:2876$350, bilinearintrp.$mul$raygentop.v:2877$351, bilinearintrp.$mul$raygentop.v:2878$352, bilinearintrp.$mul$raygentop.v:2879$353, bilinearintrp.$mul$raygentop.v:2880$354, bilinearintrp.$mul$raygentop.v:2881$355, bilinearintrp.$mul$raygentop.v:2882$356
SHARED_REDUCTION: Three separate 3-term barycentric dot products inside bilinearintrp (raygentop.v:2884-2886): assign r = i1r + i2r + i3r (regions $348,$349,$350), assign g = i1g + i2g + i3g (regions $351,$352,$353), assign b = i1b + i2b + i3b (regions $354,$355,$356). Each reduction is fused independently; no product is ever moved across colour channels.
MAPPING:
Per channel C in {r, g, b}, the existing three product terms ul*Cul, vl*Cvl, wl*Cwl are mapped onto a 3-deep chain of comb_mult_add_16 instances (9 instances total, 3 per reduction). All operands are unsigned and strictly narrower than the 16-bit ports (ul/vl/wl are 8-bit, Cul/Cvl/Cwl are 7-bit), so they are zero-extended into the signed ports and always land in the non-negative half of INT16 — the mapping is exact, not an approximation.
Red channel (green/blue identical with gu/gv/gw, bu/bv/bw):
mac_r0: ax = {8'b0, wl}, ay = {9'b0, rwl}, bx = 32'd0 (head of chain, unused addend tied to 0), result → wirepr0[63:0]= wl*rwl.mac_r1: ax = {8'b0, vl}, ay = {9'b0, rvl}, bx = pr0[31:0], result → wirepr1[63:0]= vl*rvl + wl*rwl.mac_r2: ax = {8'b0, ul}, ay = {9'b0, rul}, bx = pr1[31:0], result → wirepr2[63:0]= ul*rul + vl*rvl + wl*rwl (the complete reduction).pr2[16:0]is captured by a new 17-bit registersumrin the samealways @(posedge clk)block that formerly heldi1r/i2r/i3r;assign r = sumr[6:0].
PLAN:
- Delete the nine
i1r/i2r/i3r/i1g/.../i3b15-bit product registers and their nine<=multiply statements (lines 2874-2882). Replace them with three 17-bit registerssumr,sumg,sumb, each assigned the corresponding chain output inside the same clocked block, driven by the same operand values (ul,vl,wl,rul…bwl) already registered one cycle earlier at lines 2863-2873. Those latching statements are untouched, so the operand pipeline stage is unchanged. - Replace
assign r/g/b = i1+i2+i3withassign r = sumr[6:0];assign g = sumg[6:0];assign b = sumb[6:0];. - Live interface preservation: module ports (
u01a…v10c,selectuv,ru…bw,r,g,b,clk) are unchanged, so the instantiationbilinearintrp bilinearimp (…, blr, blg, blb, clk)at raygentop.v:2012 needs no edit. Downstream consumersblr/blg/blb(packed intotemp_shadedata{a,b,c}[20:0]at lines 2265-2267, 2423-2425, 2482-2484, andblb/blgfeedinglinearmapat line 2011) see bit-identical values on identical cycles. - Cycle-accuracy argument: today the three products are registered at edge N and summed combinationally after edge N; after the change the sum of the same three products (same operand values, same edge) is registered at edge N and
ris a direct slice of that register. Both produce the final value in the window after edge N — one pipeline stage in, one stage out, no latency change. Bit-exactness: the original expression is evaluated at 15-bit width and truncated to the 7-bit output, i.e.r= low 7 bits of the true sum; the fused chain computes the true sum exactly (max 3·255·127 = 97155, well inside the 32-bitbxand 64-bitresultpaths) and takes the same low 7 bits. Carry-in/truncation semantics are therefore identical, not merely "close". - Introduced operations/datatypes: NONE. No new arithmetic family, no signed/unsigned reinterpretation of any design value (zero-extension of unsigned operands into the signed ports is the documented exact widening), no width change on any live signal. Every
comb_mult_add_16port is driven:bxis tied to 32'd0 only on the head of each chain;ax/ayalways carry a real operand. - Why not
matmult(regions $15…$23), despite it also being a 3-term dot product: (a) its operandsAx/Ay/Azandm11…m33are 16-bit unsigned values multiplied with Verilog*— an unsigned operand exactly as wide as the 16-bit signed port has no exact representation on this block; (b) its reduction at lines 2348-2350 sums truncated slicesam[30:15]of the registered products, so folding an add into the multiply (which adds full-width products before truncation) changes the result by the carry out of the discarded low 15 bits. Both make a function-preserving T1/T2 mapping impossible there, somatmultis deliberately left alone. - Risks: (i) Stage-1 combinational depth grows from one 8×7 multiply to multiply + two 32-bit adds chained through three hard blocks — Fmax on the
bilinearintrpproduct stage may drop; if it becomes critical, the chain per channel can be shortened to two blocks (onecomb_mult_add_16fusing two terms, third product left as-is) with no change to the exactness argument. (ii) Synthesis ofpr1[31:0]feedingbxmust not be inferred as a signed/unsigned mismatch — values are provably < 2^17 so the two's-complement interpretation is positive in all cases. (iii) The removedi1*/i2*/i3*regs must be scrubbed everywhere (they have no other readers in the file — verified: only lines 2884-2886), otherwise synthesis leaves dangling registers.
tool events
bash
{
"command": "wc -l /work/raygentop.v"
}2978 /work/raygentop.v
grep
{
"pattern": "module |endmodule",
"path": "/work/raygentop.v"
}Found 30 matches /work/raygentop.v: Line 1: module paj_raygentop_hierarchy_no_mem (rgwant_addr, rgwant_data, rgread_ready, rgaddr_ready, rgdata_ready, rgwant_read, rgdatain, rgdataout, rgaddrin, rgCont, rgStat, rgCfgData, rgwant_CfgData, rgCfgData_ready, tm3_sram_data_in, tm3_sram_data_out, tm3_sram_addr, tm3_sram_we, tm3_sram_oe, tm3_sram_adsp, clk, fbdata, fbdatavalid, fbnextscanline, raygroup01, raygroupvalid01, busy01, raygroup10, raygroupvalid10, busy10, globalreset, rgData, rgAddr, rgWE, rgAddrValid, rgDone, rgResultData, rgResultReady, rgResultSource); Line 190: endmodule Line 193: module delay1x3 (datain, dataout, clk); Line 213: endmodule Line 222: module onlyonecycle (trigger, output_xhdl0, globalreset, clk); Line 296: endmodule Line 298: module matmult (Ax, Ay, Az, m11, m12, m13, m21, m22, m23, m31, m32, m33, Cx, Cy, Cz, clk); Line 352: endmodule Line 357: module rgconfigmemory (CfgAddr, CfgData, CfgData_Ready, want_CfgData, origx, origy, origz, m11, m12, m13, m21, m22, m23, m31, m32, m33, bkcolour, texinfo, globalreset, clk); Line 542: endmodule Line 546: module spram21x4 (we, dataout, datain, clk); Line 580: endmodule Line 593: module rgsramcontroller (want_addr, addr_ready, addrin, want_data, data_ready, datain, want_read, read_ready, dataout, dirReady, wantDir, sramdatal, addr, wantwriteback, writebackack, writebackdata, writebackaddr, fbdata, fbnextscanline, fbdatavalid, fbpage, shadedata, triID, wantshadedata, shadedataready, texeladdr, texel, wanttexel, texelready, tm3_sram_data_in, tm3_sram_data_out, tm3_sram_addr, tm3_sram_we, tm3_sram_oe, tm3_sram_adsp, globalreset, clk); Line 1028: endmodule Line 1041: module raysend (as, ack, addr, dir, origx, origy, origz, rgData, rgAddr, rgWE, rgAddrValid, rgDone, globalreset, clk, statepeek); Line 1257: endmodule Line 1265: module raygencont (go, initcount, busyout, cycles, nextaddr, nas0, nas1, page, dirReady, wantDir, dirIn, addrIn, as, addr, ack, dir, raygroup0, raygroupvalid0, busy0, raygroup1, raygroupvalid1, busy1, globalreset, clk, statepeek); Line 1615: endmodule Line 1624: module resultrecieve (valid01, valid10, id01a, id01b, id01c, id10a, id10b, id10c, hit01a, hit01b, hit01c, hit10a, hit10b, hit10c, u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, rgResultData, rgResultReady, rgResultSource, globalreset, clk); Line 1892: endmodule Line 1908: module resultwriter (valid01, valid10, id01a, id01b, id01c, id10a, id10b, id10c, hit01a, hit01b, hit01c, hit10a, hit10b, hit10c, u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, addr, as01, as10, bkcolour, shadedata, triID, wantshadedata, shadedataready, texinfo, texaddr, texeladdr, texel, wanttexel, texelready, dataout, addrout, write, ack, globalreset, clk); Line 2638: endmodule Line 2654: module col16to21 (dataline, texelselect, r, g, b); Line 2691: endmodule Line 2692: module linearmap (u, v, start, addr, texelselect, factor, enable, clk); Line 2761: endmodule Line 2762: module bilinearintrp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, ru, rv, rw, gu, gv, gw, bu, bv, bw, r, g, b, clk); Line 2887: endmodule Line 2891: module fifo3 (datain, writeen, dataout, shiften, globalreset, clk); Line 2977: endmodule
read
{
"filePath": "/work/raygentop.v",
"offset": 296,
"limit": 60
}<path>/work/raygentop.v</path> <type>file</type> <content> 296: endmodule 297: 298: module matmult (Ax, Ay, Az, m11, m12, m13, m21, m22, m23, m31, m32, m33, Cx, Cy, Cz, clk); 299: 300: input[16 - 1:0] Ax; 301: input[16 - 1:0] Ay; 302: input[16 - 1:0] Az; 303: input[16 - 1:0] m11; 304: input[16 - 1:0] m12; 305: 306: input[16 - 1:0] m13; 307: input[16 - 1:0] m21; 308: input[16 - 1:0] m22; 309: input[16 - 1:0] m23; 310: input[16 - 1:0] m31; 311: input[16 - 1:0] m32; 312: input[16 - 1:0] m33; 313: output[16 - 1:0] Cx; 314: reg[16 - 1:0] Cx; 315: output[16 - 1:0] Cy; 316: reg[16 - 1:0] Cy; 317: output[16 - 1:0] Cz; 318: 319: reg[16 - 1:0] Cz; 320: input clk; 321: 322: reg[16 + 16 - 1:0] am11; 323: reg[16 + 16 - 1:0] am12; 324: reg[16 + 16 - 1:0] am13; 325: reg[16 + 16 - 1:0] am21; 326: reg[16 + 16 - 1:0] am22; 327: reg[16 + 16 - 1:0] am23; 328: reg[16 + 16 - 1:0] am31; 329: reg[16 + 16 - 1:0] am32; 330: reg[16 + 16 - 1:0] am33; 331: 332: 333: always @(posedge clk) 334: begin 335: am11 <= Ax * m11 ; 336: am12 <= Ay * m12 ; 337: am13 <= Az * m13 ; 338: am21 <= Ax * m21 ; 339: am22 <= Ay * m22 ; 340: am23 <= Az * m23 ; 341: am31 <= Ax * m31 ; 342: am32 <= Ay * m32 ; 343: am33 <= Az * m33 ; 344: 345: // Cx <= (am11 + am12 + am13) (`widthA+`widthB-2 downto `widthB-1); 346: // Cy <= (am21 + am22 + am23) (`widthA+`widthB-2 downto `widthB-1); 347: // Cz <= (am31 + am32 + am33) (`widthA+`widthB-2 downto `widthB-1); 348: Cx <= (am11[16+16-2:16-1] + am12[16+16-2:16-1] + am13[16+16-2:16-1]) ; 349: Cy <= (am21[16+16-2:16-1] + am22[16+16-2:16-1] + am23[16+16-2:16-1]); 350: Cz <= (am31[16+16-2:16-1] + am32[16+16-2:16-1] + am33[16+16-2:16-1]) ; 351: end 352: endmodule 353: 354: 355: (Showing lines 296-355 of 2978. Use offset=356 to continue.) </content>
read
{
"filePath": "/work/raygentop.v",
"offset": 2762,
"limit": 130
}<path>/work/raygentop.v</path> <type>file</type> <content> 2762: module bilinearintrp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, ru, rv, rw, gu, gv, gw, bu, bv, bw, r, g, b, clk); 2763: 2764: input[7:0] u01a; 2765: input[7:0] u01b; 2766: input[7:0] u01c; 2767: input[7:0] v01a; 2768: input[7:0] v01b; 2769: input[7:0] v01c; 2770: input[7:0] u10a; 2771: input[7:0] u10b; 2772: input[7:0] u10c; 2773: input[7:0] v10a; 2774: input[7:0] v10b; 2775: input[7:0] v10c; 2776: input[2:0] selectuv; 2777: input[6:0] ru; 2778: input[6:0] rv; 2779: input[6:0] rw; 2780: input[6:0] gu; 2781: input[6:0] gv; 2782: input[6:0] gw; 2783: input[6:0] bu; 2784: input[6:0] bv; 2785: input[6:0] bw; 2786: output[6:0] r; 2787: wire[6:0] r; 2788: output[6:0] g; 2789: wire[6:0] g; 2790: output[6:0] b; 2791: wire[6:0] b; 2792: input clk; 2793: 2794: reg[7:0] u; 2795: reg[7:0] v; 2796: reg[7:0] ul; 2797: reg[7:0] vl; 2798: reg[7:0] wl; 2799: reg[14:0] i1b; 2800: reg[14:0] i2b; 2801: reg[14:0] i3b; 2802: reg[14:0] i1g; 2803: reg[14:0] i2g; 2804: reg[14:0] i3g; 2805: reg[14:0] i1r; 2806: reg[14:0] i2r; 2807: reg[14:0] i3r; 2808: reg[6:0] rul; 2809: reg[6:0] rvl; 2810: reg[6:0] rwl; 2811: reg[6:0] gul; 2812: reg[6:0] gvl; 2813: reg[6:0] gwl; 2814: reg[6:0] bul; 2815: reg[6:0] bvl; 2816: reg[6:0] bwl; 2817: 2818: always @(selectuv or u01a or u01b or u01c or v01a or v01b or v01c or u10a or 2819: u10b or u10c or v10a or v10b or v10c) 2820: begin 2821: case (selectuv) 2822: 3'b000 : 2823: begin 2824: u = u01a ; 2825: v = v01a ; 2826: end 2827: 3'b001 : 2828: begin 2829: u = u01b ; 2830: v = v01b ; 2831: end 2832: 3'b010 : 2833: begin 2834: u = u01c ; 2835: v = v01c ; 2836: end 2837: 3'b100 : 2838: begin 2839: u = u10a ; 2840: v = v10a ; 2841: end 2842: 3'b101 : 2843: begin 2844: u = u10b ; 2845: v = v10b ; 2846: end 2847: 3'b110 : 2848: begin 2849: u = u10c ; 2850: v = v10c ; 2851: end 2852: default : 2853: begin 2854: u = 0; 2855: v = 0; 2856: end 2857: endcase 2858: end 2859: 2860: always @(posedge clk) 2861: begin 2862: wl <= 8'b11111111 - u - v ; 2863: ul <= u ; 2864: vl <= v ; 2865: rul <= ru ; 2866: rvl <= rv ; 2867: rwl <= rw ; 2868: gul <= gu ; 2869: gvl <= gv ; 2870: gwl <= gw ; 2871: bul <= bu ; 2872: bvl <= bv ; 2873: bwl <= bw ; 2874: i1r <= ul * rul ; 2875: i2r <= vl * rvl ; 2876: i3r <= wl * rwl ; 2877: i1g <= ul * gul ; 2878: i2g <= vl * gvl ; 2879: i3g <= wl * gwl ; 2880: i1b <= ul * …[truncated, 4425 chars total]
bash
{
"command": "grep -n \"bilinearintrp\\|colour\\|\\.r(\\|\\.g(\\|\\.b(\" /work/raygentop.v | sed -n '1,60p'"
}144: wire[20:0] bkcolour; 180: rgconfigmemory ConfigMemoryInst (rgCfgData[31:28], rgCfgData[27:0], rgCfgData_ready, wantcfg, origx, origy, origz, m11, m12, m13, m21, m22, m23, m31, m32, m33, bkcolour, texinfo, globalreset, clk); 188: resultwriter resultwriteinst (valid01, valid10, id01a, id01b, id01c, id10a, id10b, id10c, hit01a, hit01b, hit01c, hit10a, hit10b, hit10c, u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, nextaddr01, nas01, nas10, bkcolour, shadedata, triID, wantshadedata, shadedataready, texinfo, texaddr, texeladdr, texel, wanttexel, texelready, writebackdata, writebackaddr, wantwriteback, writebackack, debugglobalreset, clk); 357:module rgconfigmemory (CfgAddr, CfgData, CfgData_Ready, want_CfgData, origx, origy, origz, m11, m12, m13, m21, m22, m23, m31, m32, m33, bkcolour, texinfo, globalreset, clk); 389: output[20:0] bkcolour; 390: reg[20:0] bkcolour; 413: reg[20:0] temp_bkcolour; 437: bkcolour <= 0; 454: bkcolour <= bkcolour; 524: temp_bkcolour = CfgData[20:0] ; 1908: module resultwriter (valid01, valid10, id01a, id01b, id01c, id10a, id10b, id10c, hit01a, hit01b, hit01c, hit10a, hit10b, hit10c, u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, addr, as01, as10, bkcolour, shadedata, triID, wantshadedata, shadedataready, texinfo, texaddr, texeladdr, texel, wanttexel, texelready, dataout, addrout, write, ack, globalreset, clk); 1941: input[20:0] bkcolour; 2012: bilinearintrp bilinearimp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, shadedata[41:35], shadedata[62:56], shadedata[20:14], shadedata[34:28], shadedata[55:49], shadedata[13:7], shadedata[27:21], shadedata[48:42], shadedata[6:0], blr, blg, blb, clk); 2206: temp_shadedataa = bkcolour ; 2539: temp_shadedatab = bkcolour ; 2595: temp_shadedatac = bkcolour ; 2762: module bilinearintrp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, ru, rv, rw, gu, gv, gw, bu, bv, bw, r, g, b, clk);
bash
{
"command": "grep -n \"blr\\|blg\\|blb\" /work/raygentop.v"
}1990: wire[6:0] blr; 1991: wire[6:0] blg; 1992: wire[6:0] blb; 2011: linearmap linearmapinst (blb, blg, texinfol[17:0], texeladdr, texelselect, texinfol[20:18], lmenable, clk); 2012: bilinearintrp bilinearimp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, shadedata[41:35], shadedata[62:56], shadedata[20:14], shadedata[34:28], shadedata[55:49], shadedata[13:7], shadedata[27:21], shadedata[48:42], shadedata[6:0], blr, blg, blb, clk); 2265: temp_shadedataa[6:0] = blb ; 2266: temp_shadedataa[13:7] = blg ; 2267: temp_shadedataa[20:14] = blr ; 2423: temp_shadedatab[6:0] = blb ; 2424: temp_shadedatab[13:7] = blg ; 2425: temp_shadedatab[20:14] = blr ; 2482: temp_shadedatac[6:0] = blb ; 2483: temp_shadedatac[13:7] = blg ; 2484: temp_shadedatac[20:14] = blr ;
Call 2 · reviewer:plan · anthropic/claude-opus-5 · ok
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You are an INDEPENDENT, fair Reviewer. You did not write this plan. Judge it on merit.
Target mode: comb_mult_add_16_mode Tier: T2 Rule: Local restructuring only; preserve the region's function, role, and live consumers; no new operation/datatype family.
Regions the plan selects (9): bilinearintrp.$mul$raygentop.v:2874$348, bilinearintrp.$mul$raygentop.v:2875$349, bilinearintrp.$mul$raygentop.v:2876$350, bilinearintrp.$mul$raygentop.v:2877$351, bilinearintrp.$mul$raygentop.v:2878$352, bilinearintrp.$mul$raygentop.v:2879$353, bilinearintrp.$mul$raygentop.v:2880$354, bilinearintrp.$mul$raygentop.v:2881$355, bilinearintrp.$mul$raygentop.v:2882$356
(op 'multiply', datatype int8, consumers ['bilinearintrp']).
APPROVE the plan if it is correct and representative — a legitimate adaptation does not need to
be perfect, only sound. Do NOT demand rewrites for style, minor wording, or hypothetical concerns.
REVISE ONLY for a CONCRETE, specific violation you can name: (a) it changes the computed function
when the tier forbids it; (b) it introduces an operation/datatype absent from the design and not
admitted by the tier; (c) it fabricates terms to match a mode's n_terms (products that did not
exist / do not share a reduction); (d) it wires the mode to constants or a dead sink (mode island).
If none of these apply, APPROVE.
Your FIRST line must be exactly 'APPROVE' or 'REVISE', nothing else. If REVISE, the next lines
must name the specific violation (a/b/c/d) and what to change.
Output rules: no preamble before the verdict line — verify first, then write. Your
verdict is applied automatically and no human reads it, so do not end with a question
or an offer.
--- PLAN ---
I'll read the source first.
TIER: T2
REGIONS: bilinearintrp.$mul$raygentop.v:2874$348, bilinearintrp.$mul$raygentop.v:2875$349, bilinearintrp.$mul$raygentop.v:2876$350, bilinearintrp.$mul$raygentop.v:2877$351, bilinearintrp.$mul$raygentop.v:2878$352, bilinearintrp.$mul$raygentop.v:2879$353, bilinearintrp.$mul$raygentop.v:2880$354, bilinearintrp.$mul$raygentop.v:2881$355, bilinearintrp.$mul$raygentop.v:2882$356
SHARED_REDUCTION: Three separate 3-term barycentric dot products inside bilinearintrp (raygentop.v:2884-2886): assign r = i1r + i2r + i3r (regions $348,$349,$350), assign g = i1g + i2g + i3g (regions $351,$352,$353), assign b = i1b + i2b + i3b (regions $354,$355,$356). Each reduction is fused independently; no product is ever moved across colour channels.
MAPPING:
Per channel C in {r, g, b}, the existing three product terms ul*Cul, vl*Cvl, wl*Cwl are mapped onto a 3-deep chain of comb_mult_add_16 instances (9 instances total, 3 per reduction). All operands are unsigned and strictly narrower than the 16-bit ports (ul/vl/wl are 8-bit, Cul/Cvl/Cwl are 7-bit), so they are zero-extended into the signed ports and always land in the non-negative half of INT16 — the mapping is exact, not an approximation.
Red channel (green/blue identical with gu/gv/gw, bu/bv/bw):
mac_r0: ax = {8'b0, wl}, ay = {9'b0, rwl}, bx = 32'd0 (head of chain, unused addend tied to 0), result → wirepr0[63:0]= wl*rwl.mac_r1: ax = {8'b0, vl}, ay = {9'b0, rvl}, bx = pr0[31:0], result → wirepr1[63:0]= vl*rvl + wl*rwl.mac_r2: ax = {8'b0, ul}, ay = {9'b0, rul}, bx = pr1[31:0], result → wirepr2[63:0]= ul*rul + vl*rvl + wl*rwl (the complete reduction).pr2[16:0]is captured by a new 17-bit registersumrin the samealways @(posedge clk)block that formerly heldi1r/i2r/i3r;assign r = sumr[6:0].
PLAN:
- Delete the nine
i1r/i2r/i3r/i1g/.../i3b15-bit product registers and their nine<=multiply statements (lines 2874-2882). Replace them with three 17-bit registerssumr,sumg,sumb, each assigned the corresponding chain output inside the same clocked block, driven by the same operand values (ul,vl,wl,rul…bwl) already registered one cycle earlier at lines 2863-2873. Those latching statements are untouched, so the operand pipeline stage is unchanged. - Replace
assign r/g/b = i1+i2+i3withassign r = sumr[6:0];assign g = sumg[6:0];assign b = sumb[6:0];. - Live interface preservation: module ports (
u01a…v10c,selectuv,ru…bw,r,g,b,clk) are unchanged, so the instantiationbilinearintrp bilinearimp (…, blr, blg, blb, clk)at raygentop.v:2012 needs no edit. Downstream consumersblr/blg/blb(packed intotemp_shadedata{a,b,c}[20:0]at lines 2265-2267, 2423-2425, 2482-2484, andblb/blgfeedinglinearmapat line 2011) see bit-identical values on identical cycles. - Cycle-accuracy argument: today the three products are registered at edge N and summed combinationally after edge N; after the change the sum of the same three products (same operand values, same edge) is registered at edge N and
ris a direct slice of that register. Both produce the final value in the window after edge N — one pipeline stage in, one stage out, no latency change. Bit-exactness: the original expression is evaluated at 15-bit width and truncated to the 7-bit output, i.e.r= low 7 bits of the true sum; the fused chain computes the true sum exactly (max 3·255·127 = 97155, well inside the 32-bitbxand 64-bitresultpaths) and takes the same low 7 bits. Carry-in/truncation semantics are therefore identical, not merely "close". - Introduced operations/datatypes: NONE. No new arithmetic family, no signed/unsigned reinterpretation of any design value (zero-extension of unsigned operands into the signed ports is the documented exact widening), no width change on any live signal. Every
comb_mult_add_16port is driven:bxis tied to 32'd0 only on the head of each chain;ax/ayalways carry a real operand. - Why not
matmult(regions $15…$23), despite it also being a 3-term dot product: (a) its operandsAx/Ay/Azandm11…m33are 16-bit unsigned values multiplied with Verilog*— an unsigned operand exactly as wide as the 16-bit signed port has no exact representation on this block; (b) its reduction at lines 2348-2350 sums truncated slicesam[30:15]of the registered products, so folding an add into the multiply (which adds full-width products before truncation) changes the result by the carry out of the discarded low 15 bits. Both make a function-preserving T1/T2 mapping impossible there, somatmultis deliberately left alone. - Risks: (i) Stage-1 combinational depth grows from one 8×7 multiply to multiply + two 32-bit adds chained through three hard blocks — Fmax on the
bilinearintrpproduct stage may drop; if it becomes critical, the chain per channel can be shortened to two blocks (onecomb_mult_add_16fusing two terms, third product left as-is) with no change to the exactness argument. (ii) Synthesis ofpr1[31:0]feedingbxmust not be inferred as a signed/unsigned mismatch — values are provably < 2^17 so the two's-complement interpretation is positive in all cases. (iii) The removedi1*/i2*/i3*regs must be scrubbed everywhere (they have no other readers in the file — verified: only lines 2884-2886), otherwise synthesis leaves dangling registers.
Read these files in this directory: raygentop.v
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I'll verify the plan against the actual source before judging.
APPROVE
Verification performed against /work/raygentop.v:
- Regions are real and correctly located. Lines 2874–2882 are exactly the nine
i1r/i2r/i3r/i1g/…/i3b <= ul*rul… statements;$348→2874 and$356→2882 match the named regions. All nine are*operations onul/vl/wl(8-bit) ×rul…bwl(7-bit) registers declared at 2794–2816. - (c) No fabricated terms. The three per-channel products genuinely share a reduction at 2884–2886 (
assign r = (i1r+i2r+i3r)etc.). The plan keeps each channel's chain separate and never mixes products across r/g/b, so each 3-deep MAC chain corresponds to a real existing dot product. - (a) Function preserved.
ul*rul≤ 255·127 = 32385 fits the 15-biti*regs exactly, so no information is lost pre-sum. The originalassign revaluates at 15-bit width (self-determined max of the operands) and truncates tor[6:0]; the low 7 bits of a mod-2^15 sum equal the low 7 bits of the true sum, which is what the exact 3-term chain (max 97155 < 2^17) also yields. Timing is also preserved: because the products use non-blocking assignment fromul/vl/wl,i*captured at edge N already reflects the pre-edge operand registers, so capturing the combinational chain of the same pre-edge registers intosumrat edge N leavesrvalid in the identical cycle window. One stage in, one stage out. - (b) No new op/datatype family. Multiply and add both already exist in the region and its reduction. Operands are unsigned 8-/7-bit zero-extended into the 16-bit ports ({8'b0,wl}, {9'b0,rwl} = 16 bits each), which is an exact widening with no sign reinterpretation of any design value.
- (d) Not a mode island. Outputs reach live consumers:
bilinearintrpat 2012 drivesblr/blg/blb, consumed at 2266–2267, 2424–2425, 2483–2484 and bylinearmapat 2011. Ports are unchanged so no caller edit is needed. The only constant isbx = 32'd0on the head of each chain — a standard accumulator seed on an instance whoseax/aycarry real operands and whose result feeds the next live stage; not a constant-fed island. - The
matmultexclusion rationale (2348–2350 sums truncatedam[30:15]slices, so fusing the add pre-truncation would change results) is accurate and appropriately conservative.
The stated Fmax risk and the dangling-register cleanup note are engineering caveats, not tier violations. No instance of (a), (b), (c), or (d) applies.
tool events
bash
{
"command": "ls /work; wc -l /work/raygentop.v 2>/dev/null"
}raygentop.v 2978 /work/raygentop.v
bash
{
"command": "sed -n '2820,2900p' /work/raygentop.v"
} begin
case (selectuv)
3'b000 :
begin
u = u01a ;
v = v01a ;
end
3'b001 :
begin
u = u01b ;
v = v01b ;
end
3'b010 :
begin
u = u01c ;
v = v01c ;
end
3'b100 :
begin
u = u10a ;
v = v10a ;
end
3'b101 :
begin
u = u10b ;
v = v10b ;
end
3'b110 :
begin
u = u10c ;
v = v10c ;
end
default :
begin
u = 0;
v = 0;
end
endcase
end
always @(posedge clk)
begin
wl <= 8'b11111111 - u - v ;
ul <= u ;
vl <= v ;
rul <= ru ;
rvl <= rv ;
rwl <= rw ;
gul <= gu ;
gvl <= gv ;
gwl <= gw ;
bul <= bu ;
bvl <= bv ;
bwl <= bw ;
i1r <= ul * rul ;
i2r <= vl * rvl ;
i3r <= wl * rwl ;
i1g <= ul * gul ;
i2g <= vl * gvl ;
i3g <= wl * gwl ;
i1b <= ul * bul ;
i2b <= vl * bvl ;
i3b <= wl * bwl ;
end
assign r = (i1r + i2r + i3r) ;
assign g = (i1g + i2g + i3g) ;
assign b = (i1b + i2b + i3b) ;
endmodule
module fifo3 (datain, writeen, dataout, shiften, globalreset, clk);
input[18 - 1:0] datain;
input writeen;
output[18 - 1:0] dataout;
wire[18 - 1:0] dataout;
input shiften;
input globalreset;
input clk;
bash
{
"command": "sed -n '2760,2822p' /work/raygentop.v"
} end
endmodule
module bilinearintrp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, ru, rv, rw, gu, gv, gw, bu, bv, bw, r, g, b, clk);
input[7:0] u01a;
input[7:0] u01b;
input[7:0] u01c;
input[7:0] v01a;
input[7:0] v01b;
input[7:0] v01c;
input[7:0] u10a;
input[7:0] u10b;
input[7:0] u10c;
input[7:0] v10a;
input[7:0] v10b;
input[7:0] v10c;
input[2:0] selectuv;
input[6:0] ru;
input[6:0] rv;
input[6:0] rw;
input[6:0] gu;
input[6:0] gv;
input[6:0] gw;
input[6:0] bu;
input[6:0] bv;
input[6:0] bw;
output[6:0] r;
wire[6:0] r;
output[6:0] g;
wire[6:0] g;
output[6:0] b;
wire[6:0] b;
input clk;
reg[7:0] u;
reg[7:0] v;
reg[7:0] ul;
reg[7:0] vl;
reg[7:0] wl;
reg[14:0] i1b;
reg[14:0] i2b;
reg[14:0] i3b;
reg[14:0] i1g;
reg[14:0] i2g;
reg[14:0] i3g;
reg[14:0] i1r;
reg[14:0] i2r;
reg[14:0] i3r;
reg[6:0] rul;
reg[6:0] rvl;
reg[6:0] rwl;
reg[6:0] gul;
reg[6:0] gvl;
reg[6:0] gwl;
reg[6:0] bul;
reg[6:0] bvl;
reg[6:0] bwl;
always @(selectuv or u01a or u01b or u01c or v01a or v01b or v01c or u10a or
u10b or u10c or v10a or v10b or v10c)
begin
case (selectuv)
3'b000 :
bash
{
"command": "grep -n \"i1r <=\\|i3b <=\\|assign r = (i1r\\|bilinearintrp bilinearimp\\|blr\\|blg\" /work/raygentop.v | head -40"
}1990: wire[6:0] blr; 1991: wire[6:0] blg; 2011: linearmap linearmapinst (blb, blg, texinfol[17:0], texeladdr, texelselect, texinfol[20:18], lmenable, clk); 2012: bilinearintrp bilinearimp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, shadedata[41:35], shadedata[62:56], shadedata[20:14], shadedata[34:28], shadedata[55:49], shadedata[13:7], shadedata[27:21], shadedata[48:42], shadedata[6:0], blr, blg, blb, clk); 2266: temp_shadedataa[13:7] = blg ; 2267: temp_shadedataa[20:14] = blr ; 2424: temp_shadedatab[13:7] = blg ; 2425: temp_shadedatab[20:14] = blr ; 2483: temp_shadedatac[13:7] = blg ; 2484: temp_shadedatac[20:14] = blr ; 2874: i1r <= ul * rul ; 2882: i3b <= wl * bwl ; 2884: assign r = (i1r + i2r + i3r) ;
Call 3 · editor · anthropic/claude-opus-5 · ok
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Edit raygentop.v in this directory. Local restructuring: re-express the region (e.g. a multiply array + adder tree as a fused sum-of-products) to reach the mode; preserve the region's function and role, keep the rest of the design unchanged, wire the mode's real consumers.
Goal: rewrite the RTL so the hard-block mode 'comb_mult_add_16_mode' is exercised in the packed netlist,
doing real work, while preserving the design's behaviour and role.
Tier: T2
Hard-block primitive to instantiate: comb_mult_add_16 (precision INT16)
computes: out = ax*ay + bx
input ports: ax[16], ay[16], bx[32]
output ports: result[64]
arithmetic: the block's operands and result are signed two's complement. A design operand narrower than its port must be widened to the port width: zero-extended if the design treats it as unsigned, sign-extended if signed. An unsigned design operand as wide as its port has no exact representation on this block.
timing: the block is combinational; result is valid in the same cycle the inputs are applied (no clock port).
Wire EVERY operand of the fused region onto the input ports (name them exactly as above); drive the region's real consumer from the output port. Tie unused term ports to 0. Do not leave input ports unconnected.
Regions selected by the approved plan: 9 — bilinearintrp.$mul$raygentop.v:2874$348, bilinearintrp.$mul$raygentop.v:2875$349, bilinearintrp.$mul$raygentop.v:2876$350, bilinearintrp.$mul$raygentop.v:2877$351, bilinearintrp.$mul$raygentop.v:2878$352, bilinearintrp.$mul$raygentop.v:2879$353, bilinearintrp.$mul$raygentop.v:2880$354, bilinearintrp.$mul$raygentop.v:2881$355, bilinearintrp.$mul$raygentop.v:2882$356. They already feed the common reduction 'Three separate 3-term barycentric dot products inside bilinearintrp (raygentop.v:2884-2886): assign r = i1r + i2r + i3r (regions $348,$349,$350), assign g = i1g + i2g + i3g (regions $351,$352,$353), assign b = i1b + i2b + i3b (regions $354,$355,$356). Each reduction is fused independently; no product is ever moved across colour channels.'. Each 'comb_mult_add_16_mode' block fuses 1 product term(s); the plan below states how the 9 regions map onto block instances. Fuse only these existing terms; do not invent new ones.
Rules: edit Verilog source only; preserve the module's live inputs/outputs and its downstream
consumers; do not introduce operations or datatypes absent from the design unless this tier
admits a variant; keep the surrounding design unchanged for T1/T2. Do not fabricate terms merely
to match a mode's n_terms — that is not representative.
Output rules: your edit is verified automatically and no human reads this, so do not
end with a question or an offer; state what you changed and stop.
Follow this approved plan:
I'll read the source first.
TIER: T2
REGIONS: bilinearintrp.$mul$raygentop.v:2874$348, bilinearintrp.$mul$raygentop.v:2875$349, bilinearintrp.$mul$raygentop.v:2876$350, bilinearintrp.$mul$raygentop.v:2877$351, bilinearintrp.$mul$raygentop.v:2878$352, bilinearintrp.$mul$raygentop.v:2879$353, bilinearintrp.$mul$raygentop.v:2880$354, bilinearintrp.$mul$raygentop.v:2881$355, bilinearintrp.$mul$raygentop.v:2882$356
SHARED_REDUCTION: Three separate 3-term barycentric dot products inside bilinearintrp (raygentop.v:2884-2886): assign r = i1r + i2r + i3r (regions $348,$349,$350), assign g = i1g + i2g + i3g (regions $351,$352,$353), assign b = i1b + i2b + i3b (regions $354,$355,$356). Each reduction is fused independently; no product is ever moved across colour channels.
MAPPING:
Per channel C in {r, g, b}, the existing three product terms ul*Cul, vl*Cvl, wl*Cwl are mapped onto a 3-deep chain of comb_mult_add_16 instances (9 instances total, 3 per reduction). All operands are unsigned and strictly narrower than the 16-bit ports (ul/vl/wl are 8-bit, Cul/Cvl/Cwl are 7-bit), so they are zero-extended into the signed ports and always land in the non-negative half of INT16 — the mapping is exact, not an approximation.
Red channel (green/blue identical with gu/gv/gw, bu/bv/bw):
mac_r0: ax = {8'b0, wl}, ay = {9'b0, rwl}, bx = 32'd0 (head of chain, unused addend tied to 0), result → wirepr0[63:0]= wl*rwl.mac_r1: ax = {8'b0, vl}, ay = {9'b0, rvl}, bx = pr0[31:0], result → wirepr1[63:0]= vl*rvl + wl*rwl.mac_r2: ax = {8'b0, ul}, ay = {9'b0, rul}, bx = pr1[31:0], result → wirepr2[63:0]= ul*rul + vl*rvl + wl*rwl (the complete reduction).pr2[16:0]is captured by a new 17-bit registersumrin the samealways @(posedge clk)block that formerly heldi1r/i2r/i3r;assign r = sumr[6:0].
PLAN:
- Delete the nine
i1r/i2r/i3r/i1g/.../i3b15-bit product registers and their nine<=multiply statements (lines 2874-2882). Replace them with three 17-bit registerssumr,sumg,sumb, each assigned the corresponding chain output inside the same clocked block, driven by the same operand values (ul,vl,wl,rul…bwl) already registered one cycle earlier at lines 2863-2873. Those latching statements are untouched, so the operand pipeline stage is unchanged. - Replace
assign r/g/b = i1+i2+i3withassign r = sumr[6:0];assign g = sumg[6:0];assign b = sumb[6:0];. - Live interface preservation: module ports (
u01a…v10c,selectuv,ru…bw,r,g,b,clk) are unchanged, so the instantiationbilinearintrp bilinearimp (…, blr, blg, blb, clk)at raygentop.v:2012 needs no edit. Downstream consumersblr/blg/blb(packed intotemp_shadedata{a,b,c}[20:0]at lines 2265-2267, 2423-2425, 2482-2484, andblb/blgfeedinglinearmapat line 2011) see bit-identical values on identical cycles. - Cycle-accuracy argument: today the three products are registered at edge N and summed combinationally after edge N; after the change the sum of the same three products (same operand values, same edge) is registered at edge N and
ris a direct slice of that register. Both produce the final value in the window after edge N — one pipeline stage in, one stage out, no latency change. Bit-exactness: the original expression is evaluated at 15-bit width and truncated to the 7-bit output, i.e.r= low 7 bits of the true sum; the fused chain computes the true sum exactly (max 3·255·127 = 97155, well inside the 32-bitbxand 64-bitresultpaths) and takes the same low 7 bits. Carry-in/truncation semantics are therefore identical, not merely "close". - Introduced operations/datatypes: NONE. No new arithmetic family, no signed/unsigned reinterpretation of any design value (zero-extension of unsigned operands into the signed ports is the documented exact widening), no width change on any live signal. Every
comb_mult_add_16port is driven:bxis tied to 32'd0 only on the head of each chain;ax/ayalways carry a real operand. - Why not
matmult(regions $15…$23), despite it also being a 3-term dot product: (a) its operandsAx/Ay/Azandm11…m33are 16-bit unsigned values multiplied with Verilog*— an unsigned operand exactly as wide as the 16-bit signed port has no exact representation on this block; (b) its reduction at lines 2348-2350 sums truncated slicesam[30:15]of the registered products, so folding an add into the multiply (which adds full-width products before truncation) changes the result by the carry out of the discarded low 15 bits. Both make a function-preserving T1/T2 mapping impossible there, somatmultis deliberately left alone. - Risks: (i) Stage-1 combinational depth grows from one 8×7 multiply to multiply + two 32-bit adds chained through three hard blocks — Fmax on the
bilinearintrpproduct stage may drop; if it becomes critical, the chain per channel can be shortened to two blocks (onecomb_mult_add_16fusing two terms, third product left as-is) with no change to the exactness argument. (ii) Synthesis ofpr1[31:0]feedingbxmust not be inferred as a signed/unsigned mismatch — values are provably < 2^17 so the two's-complement interpretation is positive in all cases. (iii) The removedi1*/i2*/i3*regs must be scrubbed everywhere (they have no other readers in the file — verified: only lines 2884-2886), otherwise synthesis leaves dangling registers.
Work iteratively IN THIS SESSION: after each edit, run bash check.sh raygentop.v and read its output; if it does not synthesize, fix the RTL and check again. Do NOT run place-and-route or any VTR/vpr command — that is verified separately. Stop when check.sh reports it synthesizes cleanly and its cell census shows the intended arithmetic. Then state what you changed. You are one step of an automated pipeline: your edit is verified automatically and no human reads this, so do not end with a question or an offer.
2 paragraph breaks restored by the export, where the recorder joined text blocks with no separator.
I'll start by reading the relevant source region.
Now I'll make the edits.
I edited only the bilinearintrp module in /work/raygentop.v.
What changed
- Declarations (was lines 2799–2807): removed the nine 15-bit product registers
i1r/i2r/i3r/i1g/i2g/i3g/i1b/i2b/i3b. Added three 17-bit accumulator registerssumr/sumg/sumband nine 64-bit wiresprr0..prr2,prg0..prg2,prb0..prb2for the hard-block outputs. - Clocked block (was lines 2874–2882): the nine
<= ul*rul…<= wl*bwlmultiply statements were replaced bysumr <= prr2[16:0],sumg <= prg2[16:0],sumb <= prb2[16:0]. The operand-latching statements above them (ul/vl/wl/rul…bwl) are untouched, so the operand pipeline stage is unchanged. Fused region: nine
comb_mult_add_16instances, three per colour channel, chained so each channel computes its full 3-term barycentric dot product:mac_C0:ax={8'b0,wl},ay={9'b0,Cwl},bx=32'b0(chain head, unused addend tied to 0)mac_C1:ax={8'b0,vl},ay={9'b0,Cvl},bx=prC0[31:0]mac_C2:ax={8'b0,ul},ay={9'b0,Cul},bx=prC1[31:0]→ the complete reduction
Every operand of each fused region is on a real port; no input port is left unconnected. All operands are unsigned and narrower than their ports (8-bit ul/vl/wl, 7-bit Cul/Cvl/Cwl), so zero-extension into the signed INT16 ports is exact and every value lands in the non-negative half.
- Consumers (was lines 2884–2886):
assign r/g/b = (i1+i2+i3)becameassign r = sumr[6:0]; assign g = sumg[6:0]; assign b = sumb[6:0];— the mode's real consumers are driven fromresult. Module ports and all downstream users (blr/blg/blbintotemp_shadedata*andlinearmap) are unchanged, same latency (one register stage), and bit-identical since the max sum 3·255·127 = 97155 fits well inside the 32-bitbx/64-bitresultpath and the same low 7 bits are taken.
Verification: bash check.sh raygentop.v reports OK: synthesizes cleanly with no yosys warnings or errors. The cell census shows comb_mult_add_16 = 9 and $mul = 9 — the nine soft multipliers that remain are matmult's, which the plan deliberately excludes (its 16-bit unsigned operands have no exact representation on this signed block, and its reduction sums truncated slices).
tool events
bash
{
"command": "ls /work"
}check.sh raygentop.v
read
{
"filePath": "/work/raygentop.v",
"offset": 2830,
"limit": 80
}<path>/work/raygentop.v</path> <type>file</type> <content> 2830: v = v01b ; 2831: end 2832: 3'b010 : 2833: begin 2834: u = u01c ; 2835: v = v01c ; 2836: end 2837: 3'b100 : 2838: begin 2839: u = u10a ; 2840: v = v10a ; 2841: end 2842: 3'b101 : 2843: begin 2844: u = u10b ; 2845: v = v10b ; 2846: end 2847: 3'b110 : 2848: begin 2849: u = u10c ; 2850: v = v10c ; 2851: end 2852: default : 2853: begin 2854: u = 0; 2855: v = 0; 2856: end 2857: endcase 2858: end 2859: 2860: always @(posedge clk) 2861: begin 2862: wl <= 8'b11111111 - u - v ; 2863: ul <= u ; 2864: vl <= v ; 2865: rul <= ru ; 2866: rvl <= rv ; 2867: rwl <= rw ; 2868: gul <= gu ; 2869: gvl <= gv ; 2870: gwl <= gw ; 2871: bul <= bu ; 2872: bvl <= bv ; 2873: bwl <= bw ; 2874: i1r <= ul * rul ; 2875: i2r <= vl * rvl ; 2876: i3r <= wl * rwl ; 2877: i1g <= ul * gul ; 2878: i2g <= vl * gvl ; 2879: i3g <= wl * gwl ; 2880: i1b <= ul * bul ; 2881: i2b <= vl * bvl ; 2882: i3b <= wl * bwl ; 2883: end 2884: assign r = (i1r + i2r + i3r) ; 2885: assign g = (i1g + i2g + i3g) ; 2886: assign b = (i1b + i2b + i3b) ; 2887: endmodule 2888: 2889: 2890: 2891: module fifo3 (datain, writeen, dataout, shiften, globalreset, clk); 2892: 2893: input[18 - 1:0] datain; 2894: input writeen; 2895: output[18 - 1:0] dataout; 2896: wire[18 - 1:0] dataout; 2897: input shiften; 2898: input globalreset; 2899: input clk; 2900: 2901: reg[18 - 1:0] data0; 2902: reg[18 - 1:0] data1; 2903: reg[18 - 1:0] data2; 2904: 2905: reg[1:0] pos; 2906: 2907: assign dataout = data0 ; 2908: 2909: always @(posedge clk) (Showing lines 2830-2909 of 2978. Use offset=2910 to continue.) </content>
bash
{
"command": "grep -n \"module bilinearintrp\" -A 80 /work/raygentop.v | head -100; echo ---; cat /work/check.sh"
}2762: module bilinearintrp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, ru, rv, rw, gu, gv, gw, bu, bv, bw, r, g, b, clk);
2763-
2764- input[7:0] u01a;
2765- input[7:0] u01b;
2766- input[7:0] u01c;
2767- input[7:0] v01a;
2768- input[7:0] v01b;
2769- input[7:0] v01c;
2770- input[7:0] u10a;
2771- input[7:0] u10b;
2772- input[7:0] u10c;
2773- input[7:0] v10a;
2774- input[7:0] v10b;
2775- input[7:0] v10c;
2776- input[2:0] selectuv;
2777- input[6:0] ru;
2778- input[6:0] rv;
2779- input[6:0] rw;
2780- input[6:0] gu;
2781- input[6:0] gv;
2782- input[6:0] gw;
2783- input[6:0] bu;
2784- input[6:0] bv;
2785- input[6:0] bw;
2786- output[6:0] r;
2787- wire[6:0] r;
2788- output[6:0] g;
2789- wire[6:0] g;
2790- output[6:0] b;
2791- wire[6:0] b;
2792- input clk;
2793-
2794- reg[7:0] u;
2795- reg[7:0] v;
2796- reg[7:0] ul;
2797- reg[7:0] vl;
2798- reg[7:0] wl;
2799- reg[14:0] i1b;
2800- reg[14:0] i2b;
2801- reg[14:0] i3b;
2802- reg[14:0] i1g;
2803- reg[14:0] i2g;
2804- reg[14:0] i3g;
2805- reg[14:0] i1r;
2806- reg[14:0] i2r;
2807- reg[14:0] i3r;
2808- reg[6:0] rul;
2809- reg[6:0] rvl;
2810- reg[6:0] rwl;
2811- reg[6:0] gul;
2812- reg[6:0] gvl;
2813- reg[6:0] gwl;
2814- reg[6:0] bul;
2815- reg[6:0] bvl;
2816- reg[6:0] bwl;
2817-
2818- always @(selectuv or u01a or u01b or u01c or v01a or v01b or v01c or u10a or
2819- u10b or u10c or v10a or v10b or v10c)
2820- begin
2821- case (selectuv)
2822- 3'b000 :
2823- begin
2824- u = u01a ;
2825- v = v01a ;
2826- end
2827- 3'b001 :
2828- begin
2829- u = u01b ;
2830- v = v01b ;
2831- end
2832- 3'b010 :
2833- begin
2834- u = u01c ;
2835- v = v01c ;
2836- end
2837- 3'b100 :
2838- begin
2839- u = u10a ;
2840- v = v10a ;
2841- end
2842- 3'b101 :
---
#!/usr/bin/env bash
# Inner-loop check: syntax + elaboration + cell census. NOT place-and-route.
# usage: bash check.sh <file.v>
# Runs plain yosys (read_verilog; hierarchy; proc; opt; stat) on the one file: no arch, no
# parmys, no hard-block library. Prints one pass/fail line, then the cell census of the whole
# design (the last "Number of cells" table yosys prints): soft arithmetic as $mul/$add/$sub,
# registers as $dff*/$sdff*, memories as $mem*, muxes as $mux/$pmux, and every instantiated
# module by name, which is where a hard-block instantiation such as comb_mult_add_16 shows up
# with its instance count.
set -u
f="${1:?usage: check.sh <file.v>}"
out="$(yosys -p "read_verilog $f; hierarchy -auto-top; proc; opt; stat" 2>&1)"
rc=$?
if [ $rc -ne 0 ]; then
echo "FAIL: does not synthesize (yosys exit $rc)"
echo "$out" | grep -iE 'error|warning' | tail -15
echo "$out" | tail -10
exit 1
fi
echo "OK: synthesizes cleanly"
echo "Cell census (yosys stat, whole design):"
echo "$out" | awk '/Number of cells:/{buf=$0 "\n"; on=1; next}
on && /^[[:space:]]+[$A-Za-z_][^[:space:]]*[[:space:]]+[0-9]+[[:space:]]*$/ {buf=buf $0 "\n"; next}
on {on=0}
END{printf "%s", buf}' \
| grep -E 'Number of cells|^[[:space:]]+(\$(mul|add|sub|mem|memrd|memwr|dff|dffe|sdff|sdffe|adff|adffe|mux|pmux)|[A-Za-z_])' || true
…[truncated, 4001 chars total]edit
{
"filePath": "/work/raygentop.v",
"oldString": " reg[14:0] i1b; \n reg[14:0] i2b; \n reg[14:0] i3b; \n reg[14:0] i1g; \n reg[14:0] i2g; \n reg[14:0] i3g; \n reg[14:0] i1r; \n reg[14:0] i2r; \n reg[14:0] i3r; \n reg[6:0] rul; ",
"newString": " reg[16:0] sumr; \n reg[16:0] sumg; \n reg[16:0] sumb; \n wire[63:0] prr0; \n wire[63:0] prr1; \n wire[63:0] prr2; \n wire[63:0] prg0; \n wire[63:0] prg1; \n wire[63:0] prg2; \n wire[63:0] prb0; \n wire[63:0] prb1; \n wire[63:0] prb2; \n reg[6:0] rul; "
}Edit applied successfully.
edit
{
"filePath": "/work/raygentop.v",
"oldString": " i1r <= ul * rul ; \n i2r <= vl * rvl ; \n i3r <= wl * rwl ; \n i1g <= ul * gul ; \n i2g <= vl * gvl ; \n i3g <= wl * gwl ; \n i1b <= ul * bul ; \n i2b <= vl * bvl ; \n i3b <= wl * bwl ; \n end \n assign r = (i1r + i2r + i3r) ;\n assign g = (i1g + i2g + i3g) ;\n assign b = (i1b + i2b + i3b) ;",
"newString": " sumr <= prr2[16:0] ; \n sumg <= prg2[16:0] ; \n sumb <= prb2[16:0] ; \n end \n\n // Red channel: ul*rul + vl*rvl + wl*rwl fused onto three comb_mult_add_16 blocks.\n comb_mult_add_16 mac_r0 (.ax({8'b0, wl}), .ay({9'b0, rwl}), .bx(32'b0), .result(prr0));\n comb_mult_add_16 mac_r1 (.ax({8'b0, vl}), .ay({9'b0, rvl}), .bx(prr0[31:0]), .result(prr1));\n comb_mult_add_16 mac_r2 (.ax({8'b0, ul}), .ay({9'b0, rul}), .bx(prr1[31:0]), .result(prr2));\n\n // Green channel: ul*gul + vl*gvl + wl*gwl\n comb_mult_add_16 mac_g0 (.ax({8'b0, wl}), .ay({9'b0, gwl}), .bx(32'b0), .result(prg0));\n comb_mult_add_16 mac_g1 (.ax({8'b0, vl}), .ay({9'b0, gvl}), .bx(prg0[31:0]), .result(prg1));\n comb_mult_add_16 mac_g2 (.ax({8'b0, ul}), .ay({9'b0, gul}), .bx(prg1[31:0]), .result(prg2));\n\n // Blue channel: ul*bul + vl*bvl + wl*bwl\n comb_mult_add_16 mac_b0 (.ax({8'b0, wl}), .ay({9'b0, bwl}), .bx(32'b0), .result(prb0));\n comb_mult_add_16 mac_b1 (.ax({8'b0, vl}), .ay({9'b0, bvl}), .bx(prb0[31:0]), .result(prb1));\n comb_mult_add_16 mac_b2 (.ax({8'b0, ul}), .ay({9'b0, bul}), .bx(prb1[31:0]), .result(prb2));\n\n assign r = sumr[6:0] ;\n assign g = sumg[6:0] ;\n assign b = sumb[6:0] ;"
}Edit applied successfully.
bash
{
"command": "bash check.sh raygentop.v",
"workdir": "/work"
}OK: synthesizes cleanly Cell census (yosys stat, whole design): check.sh: line 25: awk: command not found
bash
{
"command": "yosys -p \"read_verilog raygentop.v; hierarchy -auto-top; proc; opt; stat\" 2>&1 | tail -60",
"workdir": "/work"
} Number of memories: 0
Number of memory bits: 0
Number of processes: 0
Number of cells: 2
$dff 1
single_port_ram 1
=== design hierarchy ===
paj_raygentop_hierarchy_no_mem 1
delay1x3 1
matmult 1
onlyonecycle 1
raygencont 1
raysend 1
resultrecieve 1
resultwriter 1
bilinearintrp 1
col16to21 1
fifo3 2
linearmap 1
rgconfigmemory 1
spram21x4 1
rgsramcontroller 1
Number of wires: 1832
Number of wire bits: 9819
Number of public wires: 537
Number of public wire bits: 6554
Number of memories: 0
Number of memory bits: 0
Number of processes: 0
Number of cells: 1542
$add 21
$and 735
$dff 32
$dffe 4
$dlatch 102
$eq 84
$gt 1
$logic_and 12
$logic_not 12
$mul 9
$mux 126
$ne 10
$not 96
$or 11
$pmux 36
$reduce_and 8
$reduce_bool 5
$reduce_or 138
$sdff 75
$sdffe 8
$sub 7
comb_mult_add_16 9
single_port_ram 1
End of script. Logfile hash: 7052b9f6a8, CPU: user 0.83s system 0.01s, MEM: 36.57 MB peak
Yosys 0.33 (git sha1 2584903a060)
Time spent: 30% 6x opt_expr (0 sec), 18% 5x opt_merge (0 sec), ...
bash
{
"command": "grep -nE \"i1r|i2r|i3r|i1g|i2g|i3g|i1b|i2b|i3b\" raygentop.v; echo \"exit=$?\"; yosys -p \"read_verilog raygentop.v; hierarchy -auto-top; proc; opt\" 2>&1 | grep -iE \"warning|error\" | sort | uniq -c | head -20",
"workdir": "/work"
}exit=1
read
{
"filePath": "/work/raygentop.v",
"offset": 2858,
"limit": 40
}<path>/work/raygentop.v</path>
<type>file</type>
<content>
2858: v = 0;
2859: end
2860: endcase
2861: end
2862:
2863: always @(posedge clk)
2864: begin
2865: wl <= 8'b11111111 - u - v ;
2866: ul <= u ;
2867: vl <= v ;
2868: rul <= ru ;
2869: rvl <= rv ;
2870: rwl <= rw ;
2871: gul <= gu ;
2872: gvl <= gv ;
2873: gwl <= gw ;
2874: bul <= bu ;
2875: bvl <= bv ;
2876: bwl <= bw ;
2877: sumr <= prr2[16:0] ;
2878: sumg <= prg2[16:0] ;
2879: sumb <= prb2[16:0] ;
2880: end
2881:
2882: // Red channel: ul*rul + vl*rvl + wl*rwl fused onto three comb_mult_add_16 blocks.
2883: comb_mult_add_16 mac_r0 (.ax({8'b0, wl}), .ay({9'b0, rwl}), .bx(32'b0), .result(prr0));
2884: comb_mult_add_16 mac_r1 (.ax({8'b0, vl}), .ay({9'b0, rvl}), .bx(prr0[31:0]), .result(prr1));
2885: comb_mult_add_16 mac_r2 (.ax({8'b0, ul}), .ay({9'b0, rul}), .bx(prr1[31:0]), .result(prr2));
2886:
2887: // Green channel: ul*gul + vl*gvl + wl*gwl
2888: comb_mult_add_16 mac_g0 (.ax({8'b0, wl}), .ay({9'b0, gwl}), .bx(32'b0), .result(prg0));
2889: comb_mult_add_16 mac_g1 (.ax({8'b0, vl}), .ay({9'b0, gvl}), .bx(prg0[31:0]), .result(prg1));
2890: comb_mult_add_16 mac_g2 (.ax({8'b0, ul}), .ay({9'b0, gul}), .bx(prg1[31:0]), .result(prg2));
2891:
2892: // Blue channel: ul*bul + vl*bvl + wl*bwl
2893: comb_mult_add_16 mac_b0 (.ax({8'b0, wl}), .ay({9'b0, bwl}), .bx(32'b0), .result(prb0));
2894: comb_mult_add_16 mac_b1 (.ax({8'b0, vl}), .ay({9'b0, bvl}), .bx(prb0[31:0]), .result(prb1));
2895: comb_mult_add_16 mac_b2 (.ax({8'b0, ul}), .ay({9'b0, bul}), .bx(prb1[31:0]), .result(prb2));
2896:
2897: assign r = sumr[6:0] ;
(Showing lines 2858-2897 of 2991. Use offset=2898 to continue.)
</content>Call 4 · reviewer:acceptance · anthropic/claude-opus-5 · ok
You are an INDEPENDENT ACCEPTANCE REVIEWER — the gate of record for whether an adapted design is
a LEGITIMATE member of its benchmark suite. You did NOT plan or write this edit. Judge only what
is in front of you. Your verdict is final and fully automated; there is no human backstop, so err
toward rejecting anything you cannot positively ground.
FRAMING — refute by default. Your job is to find why this adaptation is NOT a legitimate suite
member. Assume it is contrived until the evidence shows otherwise. A rewrite that merely "makes
the mode appear in the netlist" is NOT sufficient — the mode must do real work the original
workload actually implied.
This case has already passed the deterministic structural, provenance, and (for T3) evidence
gates — do not re-litigate those mechanically. Your judgement is the legitimacy call they
cannot make: would a real designer of THIS workload ship this, or is it a mode-island / fabricated
dot-product / gratuitous variant dressed up to pass?
REJECT if any of these hold:
- (a) FABRICATED TERMS — a fused N-term product/sum aggregates operands that did not genuinely
share a reduction in the original; the "dot product" is manufactured to fill the mode's arity. - (b) MODE ISLAND / DEAD WORK — the mode's result does not flow to the design's real outputs, or
is wired to constants / a sink that the rest of the design ignores. - (c) ROLE BREAK — the adapted region no longer plays the workload role the witness recorded
(e.g. a control-path multiply repurposed as a fake datapath MAC). - (d) UNGROUNDED VARIANT (T3) — the precision/algorithm variant is not the one the cited sibling
design evidences; the adaptation drifts to a workload character the suite does not contain.
ACCEPT if the adaptation is sound: the mapped arithmetic genuinely existed, the fused terms really
shared a reduction, the mode's output drives the original consumers, and the workload role is
preserved. Legitimate adaptation need not be optimal — only real.
You MUST ground your verdict: cite the specific preserved role (from the witness), the real
region(s)/reduction the mode maps onto, and — for T3 — the sibling evidence axis. A verdict you
cannot ground is a REJECT.
--- ADAPTATION UNDER REVIEW ---
Target mode: comb_mult_add_16_mode Tier: T2
Region witness (the 'before'): role 'bilinearintrp', operation 'multiply', datatype int8,
regions ['bilinearintrp.$mul$raygentop.v:2874$348', 'bilinearintrp.$mul$raygentop.v:2875$349', 'bilinearintrp.$mul$raygentop.v:2876$350', 'bilinearintrp.$mul$raygentop.v:2877$351', 'bilinearintrp.$mul$raygentop.v:2878$352', 'bilinearintrp.$mul$raygentop.v:2879$353', 'bilinearintrp.$mul$raygentop.v:2880$354', 'bilinearintrp.$mul$raygentop.v:2881$355', 'bilinearintrp.$mul$raygentop.v:2882$356'], shared reduction 'Three separate 3-term barycentric dot products inside bilinearintrp (raygentop.v:2884-2886): assign r = i1r + i2r + i3r (regions $348,$349,$350), assign g = i1g + i2g + i3g (regions $351,$352,$353), assign b = i1b + i2b + i3b (regions $354,$355,$356). Each reduction is fused independently; no product is ever moved across colour channels.', downstream consumers ['bilinearintrp'].
Manifest (the 'after'): introduced operations [], introduced datatypes
[], intended consumers ['bilinearintrp'].
Deterministic gates: PASSED. Evidence floor: no variant introduced (T1/T2).
Packed netlist: target mode present = True.
--- EDIT DIFF ---
--- outputs/adapt/vtr_demo/raygentop/comb_mult_add_16_mode/20260913-195430-d2386a/edit/.pristine/raygentop/raygentop.v 2026-08-16 18:14:11.414163698 -0700
+++ outputs/adapt/vtr_demo/raygentop/comb_mult_add_16_mode/20260913-195430-d2386a/edit/raygentop/raygentop.v 2026-09-13 19:58:03.982923220 -0700
@@ -2796,15 +2796,18 @@
reg[7:0] ul;
reg[7:0] vl;
reg[7:0] wl;
- reg[14:0] i1b;
- reg[14:0] i2b;
- reg[14:0] i3b;
- reg[14:0] i1g;
- reg[14:0] i2g;
- reg[14:0] i3g;
- reg[14:0] i1r;
- reg[14:0] i2r;
- reg[14:0] i3r;
- reg[16:0] sumr;
- reg[16:0] sumg;
- reg[16:0] sumb;
- wire[63:0] prr0;
- wire[63:0] prr1;
- wire[63:0] prr2;
- wire[63:0] prg0;
- wire[63:0] prg1;
- wire[63:0] prg2;
- wire[63:0] prb0;
- wire[63:0] prb1;
wire[63:0] prb2;
reg[6:0] rul;
reg[6:0] rvl;
reg[6:0] rwl;
@@ -2871,19 +2874,29 @@
bul <= bu ;
bvl <= bv ;
bwl <= bw ;- i1r <= ul * rul ;
- i2r <= vl * rvl ;
- i3r <= wl * rwl ;
- i1g <= ul * gul ;
- i2g <= vl * gvl ;
- i3g <= wl * gwl ;
- i1b <= ul * bul ;
- i2b <= vl * bvl ;
- i3b <= wl * bwl ;
- sumr <= prr2[16:0] ;
- sumg <= prg2[16:0] ;
sumb <= prb2[16:0] ;
end- assign r = (i1r + i2r + i3r) ;
- assign g = (i1g + i2g + i3g) ;
- assign b = (i1b + i2b + i3b) ;
+ - // Red channel: ul*rul + vl*rvl + wl*rwl fused onto three comb_mult_add_16 blocks.
- comb_mult_add_16 mac_r0 (.ax({8'b0, wl}), .ay({9'b0, rwl}), .bx(32'b0), .result(prr0));
- comb_mult_add_16 mac_r1 (.ax({8'b0, vl}), .ay({9'b0, rvl}), .bx(prr0[31:0]), .result(prr1));
- comb_mult_add_16 mac_r2 (.ax({8'b0, ul}), .ay({9'b0, rul}), .bx(prr1[31:0]), .result(prr2));
+ - // Green channel: ul*gul + vl*gvl + wl*gwl
- comb_mult_add_16 mac_g0 (.ax({8'b0, wl}), .ay({9'b0, gwl}), .bx(32'b0), .result(prg0));
- comb_mult_add_16 mac_g1 (.ax({8'b0, vl}), .ay({9'b0, gvl}), .bx(prg0[31:0]), .result(prg1));
- comb_mult_add_16 mac_g2 (.ax({8'b0, ul}), .ay({9'b0, gul}), .bx(prg1[31:0]), .result(prg2));
+ - // Blue channel: ul*bul + vl*bvl + wl*bwl
- comb_mult_add_16 mac_b0 (.ax({8'b0, wl}), .ay({9'b0, bwl}), .bx(32'b0), .result(prb0));
- comb_mult_add_16 mac_b1 (.ax({8'b0, vl}), .ay({9'b0, bvl}), .bx(prb0[31:0]), .result(prb1));
- comb_mult_add_16 mac_b2 (.ax({8'b0, ul}), .ay({9'b0, bul}), .bx(prb1[31:0]), .result(prb2));
+ - assign r = sumr[6:0] ;
- assign g = sumg[6:0] ;
assign b = sumb[6:0] ;
endmodule
Your FIRST line must be exactly 'ACCEPT' or 'REJECT'. Then, on the following lines, state the
grounding (role preserved / real region mapped / sibling evidence) or the specific violation
(a/b/c/d) and what makes it illegitimate.
Output rules: no preamble before the verdict line — examine the file first, then write.
Your verdict is final and applied automatically, so do not end with a question or an
offer.
Read these files in this directory: raygentop.v
1 paragraph break restored by the export, where the recorder joined text blocks with no separator.
I'll examine the actual file before rendering a verdict.
ACCEPT
Grounding
Role preserved (witness → file). The witness records role bilinearintrp / operation multiply / int8, consumer bilinearintrp. In /work/raygentop.v the adapted region is still inside module bilinearintrp (line 2762), still consumes the same latched barycentric weights (ul, vl, wl from lines 2865–2867, where wl <= 8'b11111111 - u - v is the genuine third barycentric coordinate) and the same latched per-vertex colour channels (rul/rvl/rwl, gul/gvl/gwl, bul/bvl/bwl, lines 2868–2876). It remains a datapath colour-interpolation MAC, not a repurposed control multiply. No role break (c).
Real reduction mapped — not fabricated (a). The removed lines show the original reductions verbatim: i1r <= ul*rul; i2r <= vl*rvl; i3r <= wl*rwl; → assign r = (i1r + i2r + i3r), and identically for g and b. The nine witness regions $348–$356 are exactly these nine products. The fusion respects the witness constraint that "no product is ever moved across colour channels": mac_r{0,1,2} carry only red operands, mac_g* only green, mac_b* only blue, and each chain's bx accumulator links only within its own channel (prr0→prr1→prr2). The arity is filled by terms that genuinely shared the reduction; nothing was borrowed from another channel or another reduction to reach three terms. The bx(32'b0) on mac_r0/g0/b0 is the standard head-of-accumulation-chain idiom, not a constant-wired sink — its product wl*rwl propagates through the chain.
Not a mode island (b). prr2/prg2/prb2 → sumr/sumg/sumb (lines 2877–2879) → r/g/b (2897–2899) → the module's original output ports → blr/blg/blb at the instantiation on line 2012 → shadedata writes at lines 2265–2267, 2423–2425, 2482–2484. The mode's result reaches the identical downstream consumers the original assign r/g/b fed. No dangling MAC outputs; every instantiated block's result is either chained or committed.
Semantics preserved. Output width and truncation match the original: max value 255*127*3 = 97155 < 2^17, so sum*[16:0] holds the exact 3-term sum, and r = sumr[6:0] reproduces the original assign r = i1r+i2r+i3r truncation to output[6:0] bit-exactly (the original's 15-bit expression wrap does not disturb the low 7 bits). Latency is also unchanged at two register stages (inputs latched, then product/sum latched).
Tier. T2 — manifest introduces no new operations or datatypes, so the T3 sibling-evidence axis does not apply and no variant drift is possible.
Non-blocking observation (outside this gate, already covered by the passed structural/packing gate): the chain places three serial multiply-adds in one register-to-register path where the original had a single multiply plus a comb adder tree, and only ax/ay/bx/result are bound on each block. That is a QoR/port-binding matter for the model conformance check, not a legitimacy defect — the adaptation is real, not contrived.
tool events
bash
{
"command": "ls -la /work; find / -name \"raygentop.v\" -not -path \"*/proc/*\" 2>/dev/null | head -50"
}total 88 drwx------ 2 samu samu 4096 Sep 14 02:59 . drwxr-xr-x 9 samu samu 260 Sep 14 02:59 .. -rw-rw-r-- 1 samu samu 85822 Sep 14 02:58 raygentop.v /work/raygentop.v
bash
{
"command": "grep -n \"bilinearintrp\\|comb_mult_add_16\" /work/raygentop.v | head -60"
}2012: bilinearintrp bilinearimp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, shadedata[41:35], shadedata[62:56], shadedata[20:14], shadedata[34:28], shadedata[55:49], shadedata[13:7], shadedata[27:21], shadedata[48:42], shadedata[6:0], blr, blg, blb, clk);
2762: module bilinearintrp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, ru, rv, rw, gu, gv, gw, bu, bv, bw, r, g, b, clk);
2882: // Red channel: ul*rul + vl*rvl + wl*rwl fused onto three comb_mult_add_16 blocks.
2883: comb_mult_add_16 mac_r0 (.ax({8'b0, wl}), .ay({9'b0, rwl}), .bx(32'b0), .result(prr0));
2884: comb_mult_add_16 mac_r1 (.ax({8'b0, vl}), .ay({9'b0, rvl}), .bx(prr0[31:0]), .result(prr1));
2885: comb_mult_add_16 mac_r2 (.ax({8'b0, ul}), .ay({9'b0, rul}), .bx(prr1[31:0]), .result(prr2));
2888: comb_mult_add_16 mac_g0 (.ax({8'b0, wl}), .ay({9'b0, gwl}), .bx(32'b0), .result(prg0));
2889: comb_mult_add_16 mac_g1 (.ax({8'b0, vl}), .ay({9'b0, gvl}), .bx(prg0[31:0]), .result(prg1));
2890: comb_mult_add_16 mac_g2 (.ax({8'b0, ul}), .ay({9'b0, gul}), .bx(prg1[31:0]), .result(prg2));
2893: comb_mult_add_16 mac_b0 (.ax({8'b0, wl}), .ay({9'b0, bwl}), .bx(32'b0), .result(prb0));
2894: comb_mult_add_16 mac_b1 (.ax({8'b0, vl}), .ay({9'b0, bvl}), .bx(prb0[31:0]), .result(prb1));
2895: comb_mult_add_16 mac_b2 (.ax({8'b0, ul}), .ay({9'b0, bul}), .bx(prb1[31:0]), .result(prb2));
read
{
"filePath": "/work/raygentop.v",
"offset": 2755,
"limit": 150
}<path>/work/raygentop.v</path>
<type>file</type>
<content>
2755: begin
2756: addr <= start + ({13'b0000000000000, ul[6:2]}) + ({4'b0000, vl, 7'b0000000}) ;
2757:
2758: end
2759: endcase
2760: end
2761: endmodule
2762: module bilinearintrp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, ru, rv, rw, gu, gv, gw, bu, bv, bw, r, g, b, clk);
2763:
2764: input[7:0] u01a;
2765: input[7:0] u01b;
2766: input[7:0] u01c;
2767: input[7:0] v01a;
2768: input[7:0] v01b;
2769: input[7:0] v01c;
2770: input[7:0] u10a;
2771: input[7:0] u10b;
2772: input[7:0] u10c;
2773: input[7:0] v10a;
2774: input[7:0] v10b;
2775: input[7:0] v10c;
2776: input[2:0] selectuv;
2777: input[6:0] ru;
2778: input[6:0] rv;
2779: input[6:0] rw;
2780: input[6:0] gu;
2781: input[6:0] gv;
2782: input[6:0] gw;
2783: input[6:0] bu;
2784: input[6:0] bv;
2785: input[6:0] bw;
2786: output[6:0] r;
2787: wire[6:0] r;
2788: output[6:0] g;
2789: wire[6:0] g;
2790: output[6:0] b;
2791: wire[6:0] b;
2792: input clk;
2793:
2794: reg[7:0] u;
2795: reg[7:0] v;
2796: reg[7:0] ul;
2797: reg[7:0] vl;
2798: reg[7:0] wl;
2799: reg[16:0] sumr;
2800: reg[16:0] sumg;
2801: reg[16:0] sumb;
2802: wire[63:0] prr0;
2803: wire[63:0] prr1;
2804: wire[63:0] prr2;
2805: wire[63:0] prg0;
2806: wire[63:0] prg1;
2807: wire[63:0] prg2;
2808: wire[63:0] prb0;
2809: wire[63:0] prb1;
2810: wire[63:0] prb2;
2811: reg[6:0] rul;
2812: reg[6:0] rvl;
2813: reg[6:0] rwl;
2814: reg[6:0] gul;
2815: reg[6:0] gvl;
2816: reg[6:0] gwl;
2817: reg[6:0] bul;
2818: reg[6:0] bvl;
2819: reg[6:0] bwl;
2820:
2821: always @(selectuv or u01a or u01b or u01c or v01a or v01b or v01c or u10a or
2822: u10b or u10c or v10a or v10b or v10c)
2823: begin
2824: case (selectuv)
2825: 3'b000 :
2826: begin
2827: u = u01a ;
2828: v = v01a ;
2829: end
2830: 3'b001 :
2831: begin
2832: u = u01b ;
2833: v = v01b ;
2834: end
2835: 3'b010 :
2836: begin
2837: u = u01c ;
2838: v = v01c ;
2839: end
2840: 3'b100 :
2841: begin
2842: u = u10a ;
2843: v = v10a ;
2844: end
2845: 3'b101 :
2846: begin
2847: u = u10b ;
2848: v = v10b ;
2849: end
2850: 3'b110 :
2851: begin
2852: u = u10c ;
2853: v = v10c ;
2854: end
2855: default :
2856: begin
2857: u = 0;
2858: v = 0;
2859: end
2860: endcase
2861: end
2862:
2863: always @(posedge clk)
2864: begin
2865: wl <= 8'b11111111 - u - v ;
2866: ul <= u ;
2867: vl <= v ;
2868: rul <= ru ;
2869: rvl <= rv ;
2870: rwl <= rw ;
2871: gul <= gu ;
2872: gvl <= gv ;
2873: gwl <=
…[truncated, 5754 chars total]bash
{
"command": "grep -rn \"module comb_mult_add_16\\|comb_mult_add_16\" /work/ 2>/dev/null | grep -v \"raygentop.v:28[89]\" | head -20; echo \"---consumers---\"; grep -n \"blr\\|blg\\|blb\" /work/raygentop.v | head -30"
}---consumers--- 1990: wire[6:0] blr; 1991: wire[6:0] blg; 1992: wire[6:0] blb; 2011: linearmap linearmapinst (blb, blg, texinfol[17:0], texeladdr, texelselect, texinfol[20:18], lmenable, clk); 2012: bilinearintrp bilinearimp (u01a, u01b, u01c, v01a, v01b, v01c, u10a, u10b, u10c, v10a, v10b, v10c, selectuv, shadedata[41:35], shadedata[62:56], shadedata[20:14], shadedata[34:28], shadedata[55:49], shadedata[13:7], shadedata[27:21], shadedata[48:42], shadedata[6:0], blr, blg, blb, clk); 2265: temp_shadedataa[6:0] = blb ; 2266: temp_shadedataa[13:7] = blg ; 2267: temp_shadedataa[20:14] = blr ; 2423: temp_shadedatab[6:0] = blb ; 2424: temp_shadedatab[13:7] = blg ; 2425: temp_shadedatab[20:14] = blr ; 2482: temp_shadedatac[6:0] = blb ; 2483: temp_shadedatac[13:7] = blg ; 2484: temp_shadedatac[20:14] = blr ;
bash
{
"command": "grep -rn \"comb_mult_add\" / --include=*.v --include=*.xml --include=*.json --include=*.md -l 2>/dev/null | head -20"
}/work/raygentop.v
bash
{
"command": "cd /tmp/opencode && which iverilog yosys verilator 2>/dev/null; echo \"--- leftovers ---\"; grep -n \"i1r\\|i2r\\|i3r\\|i1g\\|i1b\\|i2b\\|i3b\\|i2g\\|i3g\" /work/raygentop.v | head"
}--- leftovers ---
The edit
From edit.diff in the run dir: the final edited file against the pristine source.
Schematic, before the rewrite
Drawn from the netlist, not by this export.
Schematic, after the rewrite
Drawn from the netlist, not by this export.
Verification
Recorded. Written by the loop as each editor attempt ended (iterations.json, copied into outcome.json as iteration_log); nothing here is reconstructed.
Editor attempt 1 · accepted
- editor call
- call 3 · status ok · changed the file: True · diff against pristine non-empty: True · denied/failed tool calls: 0
- synthesis-only check
- ran · target macro emitted: True ·
vtr/iter01/synth/raygentop - full VTR flow
- ran · completed (packed .net written): True ·
vtr/iter01/raygentop - blocks packed in target mode
- 9
- evidence floor (whole-design variants only)
- passed · no variant introduced (direct swap or restructuring)
- acceptance reviewer
- accepted [accepted] · call 4
- result
- accepted — reviewer agent confirmed
| check | result | reason |
|---|---|---|
| target mode present in the packed netlist | passed | |
| synthesis and packing agree (macro emitted was packed) | passed | |
| no operations introduced from another family | passed | |
| the block drives real downstream consumers | passed | |
| fused regions declare the shared reduction they feed | passed | |
| a fusion names at least two real regions | passed | |
| restructuring: still feeds the same part of the design | passed | |
| restructuring: datatype family unchanged | passed |
PPA of this attempt: dsp 12 · lut 1076 · ff 904 · bram 1 · cpd 11.5018 ns
artifacts: edit/raygentop/raygentop.v · edit.diff
Synthesis-only result (counted from files)
| attempt | file | target macro instances |
|---|---|---|
| 1 | vtr/iter01/synth/raygentop/raygentop.parmys.blif | 9 × comb_mult_add_16 |
Packed netlist (counted from files)
Counted at export time from the .net file(s) in the run dir: occurrences of mode="…" for the target mode, one per packed block in that mode.
| attempt | file | target mode present | blocks in target mode |
|---|---|---|---|
| 1 | vtr/iter01/raygentop/raygentop.net | yes | 9 |
Modes recorded in the outcome as used after the edit: comb_mult_add_16_mode
Numbers
PPA as recorded
| metric | this run | baseline (current) | delta |
|---|---|---|---|
| DSP blocks | 12 | 6 | +6 |
| LUTs | 1076 | 1055 | +21 |
| FFs | 904 | 946 | -42 |
| BRAM | 1 | 1 | +0 |
| critical path (ns) | 11.5018 | 4.84502 | +6.657 ns (+137.4%) |
Baseline: the unmodified raygentop through the same flow under the current settings regime (channel width 300, device koios_extra_small, seed 1, grid 90 x 90 (koios_extra_small), routed at width 300); measured, 2026-09-12 18:36:16 -0700, from configs/baselines/complexDSP.yaml. A lower delta is better on every row.
Read from the VPR log of editor attempt 1, the last whose flow completed: the accepted variant (outcome.json ppa, ppa_iteration).
Coverage
| quantity | value | what it counts |
|---|---|---|
| candidate regions offered | 18 | detected regions handed to the planner (one RTL expression each) |
| candidate instances | 18 | those regions times the elaborated instance count of their module |
| regions selected | 9 | regions the approved plan names |
| selected instances | 9 | selected regions times their module's instance count |
| terms per block | 1 | product terms one block of the mode fuses |
| blocks packed | 9 | packed blocks in the target mode (editor attempt 1) |
Offered and packed are not the same unit: a candidate is a source region, a packed block is an elaborated instance, and one block can fuse several regions (or the editor can chain several blocks for one region), so they are recorded raw rather than as a ratio.
Block counts
| source | mode | blocks |
|---|---|---|
vtr/iter01/raygentop/raygentop.net | comb_mult_add_16_mode | 9 |
Tokens and cost per call
| # | role | model | status | in | out | reasoning | cache read | cache write | steps | tool calls (errors) | seconds | cost $ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | planner | anthropic/claude-opus-5 | ok | 10 | 7850 | 0 | 56073 | 20500 | 5 | 6 (0) | 134.4 | 0.3525 |
| 2 | reviewer:plan | anthropic/claude-opus-5 | ok | 10 | 3034 | 0 | 56136 | 6884 | 5 | 4 (0) | 49.1 | 0.1470 |
| 3 | editor | anthropic/claude-opus-5 | ok | 18 | 3994 | 0 | 134595 | 11688 | 9 | 9 (0) | 57.5 | 0.2403 |
| 4 | reviewer:acceptance | anthropic/claude-opus-5 | ok | 14 | 6651 | 0 | 91571 | 12840 | 7 | 6 (0) | 108.2 | 0.2924 |
| total (4 calls) | 52 | 21529 | 0 | 338375 | 51912 | 392.6 | 1.0321 |
Cost as reported by the gateway per call, summed. Token components are kept separate (uncached input, output, reasoning, cache read, cache write).