a2o/dev/synth/readme.md

Synthesis

yosys -s synth.yo &> yosys.txt

Arrays

grep tri_1 verilog/work/*
verilog/work/fu_fpr.v:   tri_144x78_2r4w  fpr0(
verilog/work/fu_fpr.v:   tri_144x78_2r4w  fpr1(
verilog/work/iuq_ic_dir.v:   tri_128x34_4w_1r1w  idir(
verilog/work/mmq.v:         tri_128x168_1w_0  tlb_array0(
verilog/work/mmq.v:         tri_128x168_1w_0  tlb_array1(
verilog/work/mmq.v:         tri_128x168_1w_0  tlb_array2(
verilog/work/mmq.v:         tri_128x168_1w_0  tlb_array3(
verilog/work/mmq.v:         tri_128x16_1r1w_1  lru_array0(
verilog/work/rv.v:   tri_144x78_2r4w
verilog/work/xu_gpr.v:   tri_144x78_2r4w gpr0(
verilog/work/xu_gpr.v:   tri_144x78_2r4w gpr1(

grep tri_2 verilog/work/*
verilog/work/lq_data.v:   tri_256x144_8w_1r1w #(.addressable_ports(256), .addressbus_width(8), .port_bitwidth(144), .bit_write_type(9), .ways(8)) tridcarr(

grep tri_3 verilog/work/*
verilog/work/lq_pfetch.v:    tri_32x70_2w_1r1w  rpt(

grep tri_5 verilog/work/*
verilog/work/iuq_ic_dir.v:   tri_512x162_4w_0  idata(

grep tri_6 verilog/work/*
verilog/work/iuq_btb.v:      tri_64x72_1r1w  btb0(
verilog/work/lq_ctl.v:      tri_64x34_8w_1r1w #(.addressable_ports(64), .addressbus_width(6), .port_bitwidth(WAYDATASIZE), .ways(8)) arr(
verilog/work/lq_ldq_relq.v:      tri_64x144_1r1w  rdat(
verilog/work/lq_lsq.v:         tri_64x34_8w_1r1w #(.addressable_ports(64), .addressbus_width(6), .port_bitwidth(WAYDATASIZE), .ways(8)) arr(
verilog/work/xu_spr.v:   tri_64x72_1r1w xu_spr_aspr(

grep tri_bht verilog/work/*
verilog/work/iuq.v:   tri_bht_1024x8_1r1w bht0(
verilog/work/iuq.v:   tri_bht_1024x8_1r1w bht1(
verilog/work/iuq.v:   tri_bht_512x4_1r1w bht2(

grep tri_cam verilog/work/*
verilog/work/iuq_ic_ierat.v:   tri_cam_16x143_1r1w1c  ierat_cam(
verilog/work/lq_derat.v:   tri_cam_32x143_1r1w1c derat_cam(

grep tri_iuq verilog/work/*
verilog/work/iuq_cpl.v:   tri_iuq_cpl_arr #(.ADDRESSABLE_PORTS(64), .ADDRESSBUS_WIDTH(6), .PORT_BITWIDTH(entry_length), .LATCHED_READ(1'b1),                 .LATCHED_READ_DATA(1'b1), .LATCHED_WRITE(1'b1))

By Unit

• XU (GPR, SPR) verilog/work/xu_gpr.v: tri_144x78_2r4w gpr0( verilog/work/xu_gpr.v: tri_144x78_2r4w gpr1( verilog/work/xu_spr.v: tri_64x72_1r1w xu_spr_aspr(

• FU (FPR) verilog/work/fu_fpr.v: tri_144x78_2r4w fpr0( verilog/work/fu_fpr.v: tri_144x78_2r4w fpr1(

• RV (LQ) verilog/work/rv.v: tri_144x78_2r4w

• IU (CPL, ERAT, DIR, DATA, BTB, BHT) verilog/work/iuq_cpl.v: tri_iuq_cpl_arr #(.ADDRESSABLE_PORTS(64), .ADDRESSBUS_WIDTH(6), .PORT_BITWIDTH(entry_length), .LATCHED_READ(1'b1), .LATCHED_READ_DATA(1'b1), .LATCHED_WRITE(1'b1)) verilog/work/iuq_ic_ierat.v: tri_cam_16x143_1r1w1c ierat_cam( verilog/work/iuq_ic_dir.v: tri_128x34_4w_1r1w idir( verilog/work/iuq_ic_dir.v: tri_512x162_4w_0 idata( verilog/work/iuq_btb.v: tri_64x72_1r1w btb0( verilog/work/iuq.v: tri_bht_1024x8_1r1w bht0( verilog/work/iuq.v: tri_bht_1024x8_1r1w bht1( verilog/work/iuq.v: tri_bht_512x4_1r1w bht2(

• LQ (ERAT, DIR, DATA. PFETCH, RLDQ, STQ) verilog/work/lq_derat.v: tri_cam_32x143_1r1w1c derat_cam( verilog/work/lq_pfetch.v: tri_32x70_2w_1r1w rpt( verilog/work/lq_data.v: tri_256x144_8w_1r1w #(.addressable_ports(256), .addressbus_width(8), .port_bitwidth(144), .bit_write_type(9), .ways(8)) tridcarr( verilog/work/lq_ctl.v: tri_64x34_8w_1r1w #(.addressable_ports(64), .addressbus_width(6), .port_bitwidth(WAYDATASIZE), .ways(8)) arr( verilog/work/lq_ldq_relq.v: tri_64x144_1r1w rdat( verilog/work/lq_lsq.v: tri_64x34_8w_1r1w #(.addressable_ports(64), .addressbus_width(6), .port_bitwidth(WAYDATASIZE), .ways(8)) arr(

• MMU (TLB) verilog/work/mmq.v: tri_128x168_1w_0 tlb_array0( verilog/work/mmq.v: tri_128x168_1w_0 tlb_array1( verilog/work/mmq.v: tri_128x168_1w_0 tlb_array2( verilog/work/mmq.v: tri_128x168_1w_0 tlb_array3( verilog/work/mmq.v: tri_128x16_1r1w_1 lru_array0(

By Type

Normal

• tri_144x78_2r4w verilog/work/xu_gpr.v: tri_144x78_2r4w gpr0( verilog/work/xu_gpr.v: tri_144x78_2r4w gpr1( verilog/work/fu_fpr.v: tri_144x78_2r4w fpr0( verilog/work/fu_fpr.v: tri_144x78_2r4w fpr1( verilog/work/rv.v: tri_144x78_2r4w

• tri_64x72_1r1w verilog/work/xu_spr.v: tri_64x72_1r1w xu_spr_aspr( verilog/work/iuq_btb.v: tri_64x72_1r1w btb0(

• tri_512x162_4w_0 verilog/work/iuq_ic_dir.v: tri_512x162_4w_0 idata(

• tri_32x70_2w_1r1w verilog/work/lq_pfetch.v: tri_32x70_2w_1r1w rpt(

• tri_256x144_8w_1r1w verilog/work/lq_data.v: tri_256x144_8w_1r1w #(.addressable_ports(256), .addressbus_width(8), .port_bitwidth(144), .bit_write_type(9), .ways(8)) tridcarr(

• tri_64x34_8w_1r1w verilog/work/lq_ctl.v: tri_64x34_8w_1r1w #(.addressable_ports(64), .addressbus_width(6), .port_bitwidth(WAYDATASIZE), .ways(8)) arr( verilog/work/lq_lsq.v: tri_64x34_8w_1r1w #(.addressable_ports(64), .addressbus_width(6), .port_bitwidth(WAYDATASIZE), .ways(8)) arr(

• tri_64x144_1r1w verilog/work/lq_ldq_relq.v: tri_64x144_1r1w rdat(

• tri_128x168_1w_0 verilog/work/mmq.v: tri_128x168_1w_0 tlb_array0( verilog/work/mmq.v: tri_128x168_1w_0 tlb_array1( verilog/work/mmq.v: tri_128x168_1w_0 tlb_array2( verilog/work/mmq.v: tri_128x168_1w_0 tlb_array3(

• tri_128x16_1r1w_1 verilog/work/mmq.v: tri_128x16_1r1w_1 lru_array0(

Complex

Branch History

• tri_bht_1024x8_1r1w verilog/work/iuq.v: tri_bht_1024x8_1r1w bht0( verilog/work/iuq.v: tri_bht_1024x8_1r1w bht1(

  • inner array: tri_512x16_1r1w_1 bht0(

• tri_bht_512x4_1r1w verilog/work/iuq.v: tri_bht_512x4_1r1w bht2(

  • inner array: tri_512x16_1r1w_1 bht0(

Completion

• tri_iuq_cpl_arr verilog/work/iuq_cpl.v: tri_iuq_cpl_arr #(.ADDRESSABLE_PORTS(64), .ADDRESSBUS_WIDTH(6), .PORT_BITWIDTH(entry_length), .LATCHED_READ(1'b1), .LATCHED_READ_DATA(1'b1), .LATCHED_WRITE(1'b1))
  • inner arrays (143) RAM64X1D #(.INIT(64'h0000000000000000)) RAM64X1D0( RAM64X1D #(.INIT(64'h0000000000000000)) RAM64X1D1(
  • =2x64x143

ERATs (CAM)

• tri_cam_16x143_1r1w1c verilog/work/iuq_ic_ierat.v: tri_cam_16x143_1r1w1c ierat_cam(

• tri_cam_32x143_1r1w1c verilog/work/lq_derat.v: tri_cam_32x143_1r1w1c derat_cam(

Summary

• the difficult arrays are the 2r4w (gpr, fpr, rv) and the cams; everything else is 1r1w

• cpl array is 1r1w (written in iu6, read in cp0), arranged even/odd for i0/i1; CPL_Q_DEPTH=32 means 32 even + 32 odd(?)

• some of these are directly changed with gen parameters; others may be do-able with some combo or parameters/spr settings/simple logic changes

  • GPR rename pool size
  • FPR rename pool size
  • completion queue depth
  • IERAT size
  • IC size
  • IC ways
  • BTB size
  • BHT size
  • DERAT size
  • DC size
  • DC ways
  • TLB size
  • TLB ways

• e.g. no xlate, small caches

  • IERAT, DERAT replaced with single-entry always-hit (no CAMs)
  • IC, DC 1W small data
  • no TLB
  • alter BTB, BHT, rename, completion as necessary
  • mmu logic (and fpu if not needed) could be dropped