| 1 |
30 |
diegovalve |
/**********************************************************************************
|
| 2 |
|
|
Theaia, Ray Cast Programable graphic Processing Unit.
|
| 3 |
|
|
Copyright (C) 2009 Diego Valverde (diego.valverde.g@gmail.com)
|
| 4 |
|
|
|
| 5 |
|
|
This program is free software; you can redistribute it and/or
|
| 6 |
|
|
modify it under the terms of the GNU General Public License
|
| 7 |
|
|
as published by the Free Software Foundation; either version 2
|
| 8 |
|
|
of the License, or (at your option) any later version.
|
| 9 |
|
|
|
| 10 |
|
|
This program is distributed in the hope that it will be useful,
|
| 11 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 12 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 13 |
|
|
GNU General Public License for more details.
|
| 14 |
|
|
|
| 15 |
|
|
You should have received a copy of the GNU General Public License
|
| 16 |
|
|
along with this program; if not, write to the Free Software
|
| 17 |
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
| 18 |
|
|
|
| 19 |
|
|
***********************************************************************************/
|
| 20 |
|
|
|
| 21 |
|
|
/**********************************************************************************
|
| 22 |
|
|
Module Description:
|
| 23 |
|
|
|
| 24 |
|
|
WIP
|
| 25 |
|
|
**********************************************************************************/
|
| 26 |
|
|
|
| 27 |
|
|
|
| 28 |
|
|
`timescale 1ns / 1ps
|
| 29 |
|
|
`include "aDefinitions.v"
|
| 30 |
|
|
|
| 31 |
|
|
`define GFSM_AFTER_RESET 0
|
| 32 |
|
|
`define GFSM_INITIAL_STATE 1
|
| 33 |
|
|
`define GFSM_TRIGGER_AABBIU 2
|
| 34 |
|
|
`define GFSM_WAIT_FOR_AABBIU 3
|
| 35 |
|
|
`define GFSM_ACK_AABBIU 10
|
| 36 |
|
|
`define GFSM_AABBIU_HIT 4
|
| 37 |
|
|
`define GFSM_AABBIU_NO_HIT 5
|
| 38 |
|
|
`define GFSM_TRIGGER_TRIANGLE_FETCH 6
|
| 39 |
|
|
`define GFSM_WAIT_FOR_TRIANGLE_FETCH 7
|
| 40 |
|
|
`define GFSM_TRIGGER_BIU_REQUSET 8
|
| 41 |
|
|
`define GFSM_WAIT_FOR_BIU 9
|
| 42 |
|
|
`define GFSM_GET_FIRST_CHILD 11
|
| 43 |
|
|
`define GFSM_CHECK_TRIANGLE_COUNT 12
|
| 44 |
|
|
`define GFSM_CHECK_NEXT_BROTHER 13
|
| 45 |
|
|
`define GFSM_GET_BROTHER 14
|
| 46 |
|
|
`define GFSM_TRIGGER_NODE_FETCH 15
|
| 47 |
|
|
`define GFSM_FETCH_NEXT_BROTHER 16
|
| 48 |
|
|
`define GFSM_CHECK_PARENTS_BROTHER 18
|
| 49 |
|
|
`define GFSM_GET_PARENTS_BROTHER 19
|
| 50 |
|
|
`define GFSM_WAIT_FOR_NODE_FETCH 20
|
| 51 |
|
|
`define GFSM_POST_BLOCK_READ_DELAY 21
|
| 52 |
|
|
`define GFSM_TRIGGER_ROOT_NODE_FETCH 23
|
| 53 |
|
|
`define GFSM_WAIT_FOR_ROOT_NODE_FETCH 24
|
| 54 |
|
|
`define GFSM_FETCH_DATA 25
|
| 55 |
|
|
`define GFSM_WAITF_FOR_BIU_AVAILABLE 26
|
| 56 |
|
|
`define GFSM_SWAP_TRIANGLE_POINTER 27
|
| 57 |
|
|
`define GFSM_DONE 28
|
| 58 |
|
|
`define GFSM_SET_TRIANGLE_LIST_INITIAL_OFFSET 29
|
| 59 |
|
|
`define GFSM_REQUEST_TCC 30
|
| 60 |
|
|
`define GFSM_WAIT_FOR_TCC 31
|
| 61 |
|
|
`define GFSM_WAIT_STATE_PRE_TCC 32
|
| 62 |
|
|
`define GFSM_INITIAL_STATE_TEXTURE 33
|
| 63 |
|
|
`define GFSM_SET_WBM_INITIAL_ADDRESS 34
|
| 64 |
|
|
`define GFSM_REQUEST_TEXTURE 35
|
| 65 |
|
|
`define GFSM_WAIT_FOR_TEXTURE 36
|
| 66 |
|
|
`define GFSM_REQUEST_NEXT_TEXTURE 37
|
| 67 |
|
|
`define GFSM_WAIT_FOR_NEXT_TEXTURE 38
|
| 68 |
|
|
`define GFSM_INC_TEXTURE_ADDRESS 39
|
| 69 |
|
|
`define GFSM_SET_NEXT_TEXTURE_ADDR 42
|
| 70 |
|
|
|
| 71 |
73 |
diegovalve |
|
| 72 |
30 |
diegovalve |
module GeometryFetchFSM
|
| 73 |
|
|
(
|
| 74 |
|
|
input wire Clock,
|
| 75 |
|
|
input wire Reset,
|
| 76 |
|
|
//Input control signals
|
| 77 |
|
|
input wire iEnable,
|
| 78 |
|
|
input wire iAABBIUHit,
|
| 79 |
|
|
input wire iBIUHit,
|
| 80 |
|
|
input wire iUCodeDone,
|
| 81 |
|
|
input wire iTexturingEnable,
|
| 82 |
|
|
input wire iTriangleReadDone,
|
| 83 |
|
|
//input wire iTextureReadDone,
|
| 84 |
|
|
input wire iNodeReadDone,
|
| 85 |
|
|
|
| 86 |
|
|
//Current Node info
|
| 87 |
|
|
input wire iNode_IsLeaf,
|
| 88 |
|
|
input wire[`WIDTH-1:0] iNode_Brother_Address,
|
| 89 |
|
|
input wire[`WIDTH-1:0] iNode_TriangleCount,
|
| 90 |
|
|
input wire[`WIDTH-1:0] iNode_Parents_Brother_Address,
|
| 91 |
|
|
//input wire[`WIDTH-1:0] Node_OffsetData_Address,
|
| 92 |
|
|
input wire[`WIDTH-1:0] iNode_FirstChild_Address,
|
| 93 |
|
|
//input wire iBIUAvailable,
|
| 94 |
|
|
//input wire Node_MaxBlocks,
|
| 95 |
|
|
|
| 96 |
|
|
//Control output signals
|
| 97 |
|
|
output reg oEnable_WBM, //Activate the WBM in I/O
|
| 98 |
|
|
output wire[`DATA_ADDRESS_WIDTH-1:0] oAddressWBM, //This is the address that we want to read from in I/O
|
| 99 |
|
|
output reg oSetAddressWBM, //This uis to tell I/O to use the adress we just set
|
| 100 |
|
|
output reg oSetIOWriteBackAddr,
|
| 101 |
|
|
output wire[`DATA_ADDRESS_WIDTH-1:0] oRAMTextureStoreLocation, //This is where we want to store the data comming from I/O
|
| 102 |
|
|
input wire iDataAvailable,
|
| 103 |
|
|
|
| 104 |
|
|
|
| 105 |
|
|
output reg [`WIDTH-1:0] oNodeAddress,
|
| 106 |
|
|
input wire iTrigger_TFF,
|
| 107 |
|
|
|
| 108 |
|
|
output reg oRequest_AABBIU,
|
| 109 |
|
|
output reg oRequest_BIU,
|
| 110 |
|
|
output reg oRequest_TCC,
|
| 111 |
|
|
output reg oTrigger_TFU,
|
| 112 |
|
|
output reg oTrigger_TNF,
|
| 113 |
|
|
output reg [1:0] oWBM_Addr_Selector, //0 = TNF, 1 = TFU, 2 = TCC
|
| 114 |
|
|
output reg oSync,
|
| 115 |
|
|
output reg oSetTFUAddressOffset,
|
| 116 |
|
|
output reg oDone
|
| 117 |
|
|
|
| 118 |
|
|
|
| 119 |
|
|
);
|
| 120 |
|
|
|
| 121 |
|
|
|
| 122 |
|
|
|
| 123 |
|
|
|
| 124 |
|
|
|
| 125 |
|
|
reg [6:0] CurrentState;
|
| 126 |
|
|
reg [6:0] NextState;
|
| 127 |
|
|
//reg //IncTextureWriteAddress;
|
| 128 |
|
|
reg IncTextureCoordRegrAddr,IncTextureCount;
|
| 129 |
|
|
wire [2:0] wTextureCount;
|
| 130 |
|
|
|
| 131 |
|
|
reg IncTriangleCount,ClearTriangleCount;
|
| 132 |
|
|
wire [`WIDTH-1:0] wTriangleCount;
|
| 133 |
|
|
|
| 134 |
|
|
//----------------------------------------
|
| 135 |
|
|
UpCounter_32 UP32_Tricount
|
| 136 |
|
|
(
|
| 137 |
|
|
|
| 138 |
|
|
.Clock( Clock ),
|
| 139 |
|
|
.Reset( ClearTriangleCount ),
|
| 140 |
|
|
.Initial( 0 ),
|
| 141 |
|
|
.Enable( IncTriangleCount ),
|
| 142 |
|
|
.Q( wTriangleCount )
|
| 143 |
|
|
|
| 144 |
|
|
);
|
| 145 |
|
|
//-----------------------------
|
| 146 |
|
|
|
| 147 |
|
|
UpCounter_16E TFF_VC1a
|
| 148 |
|
|
(
|
| 149 |
|
|
.Clock( Clock ),
|
| 150 |
|
|
.Reset( iTrigger_TFF | Reset ),
|
| 151 |
|
|
.Initial( `OREG_TEX_COORD1 ),
|
| 152 |
|
|
.Enable( IncTextureCoordRegrAddr ),
|
| 153 |
|
|
.Q( oAddressWBM )
|
| 154 |
|
|
);
|
| 155 |
|
|
|
| 156 |
|
|
//assign oAddressWBM = `OREG_TEX_COORD1;
|
| 157 |
|
|
|
| 158 |
|
|
//-----------------------------
|
| 159 |
|
|
|
| 160 |
|
|
UPCOUNTER_POSEDGE # (3) TFF_VC1
|
| 161 |
|
|
(
|
| 162 |
|
|
.Clock( Clock ),
|
| 163 |
|
|
.Reset( iTrigger_TFF ),
|
| 164 |
|
|
.Initial( 3'b0 ),
|
| 165 |
|
|
.Enable( IncTextureCount ),
|
| 166 |
|
|
.Q( wTextureCount )
|
| 167 |
|
|
);
|
| 168 |
|
|
|
| 169 |
|
|
//-----------------------------
|
| 170 |
|
|
assign oRAMTextureStoreLocation = `CREG_TEX_COLOR1;
|
| 171 |
|
|
/*
|
| 172 |
|
|
UPCOUNTER_POSEDGE # (16) TNF_TFU_2
|
| 173 |
|
|
(
|
| 174 |
|
|
|
| 175 |
|
|
.Clock( Clock ),
|
| 176 |
|
|
.Reset( iTrigger_TFF ),
|
| 177 |
|
|
.Initial( `CREG_TEX_COLOR1 ),
|
| 178 |
|
|
.Enable( //IncTextureWriteAddress ),
|
| 179 |
|
|
.Q( oRAMTextureStoreLocation )
|
| 180 |
|
|
|
| 181 |
|
|
);
|
| 182 |
|
|
*/
|
| 183 |
|
|
|
| 184 |
|
|
//----------------------------------------
|
| 185 |
|
|
`define GFSM_SELECT_TFU 2'b00 //Triangle Fetch
|
| 186 |
|
|
`define GFSM_SELECT_TFF 2'b01 //Texture Fetch
|
| 187 |
|
|
`define GFSM_SELECT_TNF 2'b10 //Tree node fetch
|
| 188 |
|
|
`define GFSM_SELECT_NULL 2'b11
|
| 189 |
|
|
|
| 190 |
|
|
//------------------------------------------------
|
| 191 |
|
|
always @(posedge Clock or posedge Reset)
|
| 192 |
|
|
begin
|
| 193 |
|
|
|
| 194 |
|
|
|
| 195 |
|
|
|
| 196 |
|
|
if (Reset)
|
| 197 |
|
|
CurrentState <= `GFSM_AFTER_RESET;
|
| 198 |
|
|
else
|
| 199 |
|
|
CurrentState <= NextState;
|
| 200 |
|
|
|
| 201 |
|
|
end
|
| 202 |
|
|
//------------------------------------------------
|
| 203 |
|
|
|
| 204 |
|
|
always @( * )
|
| 205 |
|
|
begin
|
| 206 |
|
|
case (CurrentState)
|
| 207 |
|
|
//------------------------------------------
|
| 208 |
|
|
`GFSM_AFTER_RESET:
|
| 209 |
|
|
begin
|
| 210 |
|
|
|
| 211 |
|
|
oNodeAddress <= 0;
|
| 212 |
|
|
oRequest_AABBIU <= 0;
|
| 213 |
|
|
oRequest_BIU <= 0;
|
| 214 |
|
|
oTrigger_TFU <= 0;
|
| 215 |
|
|
oTrigger_TNF <= 0;
|
| 216 |
|
|
ClearTriangleCount <= 0;
|
| 217 |
|
|
IncTriangleCount <= 0;
|
| 218 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 219 |
|
|
oSync <= 0;
|
| 220 |
|
|
oDone <= 0;
|
| 221 |
|
|
oSetTFUAddressOffset <= 0;
|
| 222 |
|
|
oRequest_TCC <= 0;
|
| 223 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 224 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 225 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 226 |
|
|
|
| 227 |
|
|
NextState <= `GFSM_INITIAL_STATE;
|
| 228 |
|
|
end
|
| 229 |
|
|
//------------------------------------------
|
| 230 |
|
|
/*
|
| 231 |
|
|
Here two things ca happen:
|
| 232 |
|
|
1) We are onGeometry Fetch Mode (iTrigger_TFF == 0)
|
| 233 |
|
|
then get the first node in the Octant Tree, or,
|
| 234 |
|
|
2)We are on Texture Fetch Mode (iTrigger_TFF == 1)
|
| 235 |
|
|
then do texture fetch stuff...
|
| 236 |
|
|
*/
|
| 237 |
|
|
`GFSM_INITIAL_STATE:
|
| 238 |
|
|
begin
|
| 239 |
|
|
oNodeAddress <= 0;
|
| 240 |
|
|
oRequest_AABBIU <= 0;
|
| 241 |
|
|
oRequest_BIU <= 0;
|
| 242 |
|
|
oTrigger_TFU <= 0;
|
| 243 |
|
|
oTrigger_TNF <= 0;
|
| 244 |
|
|
ClearTriangleCount <= 1; //*
|
| 245 |
|
|
IncTriangleCount <= 0;
|
| 246 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 247 |
|
|
oSync <= 0;
|
| 248 |
|
|
oDone <= 0;
|
| 249 |
|
|
oSetTFUAddressOffset <= 0;
|
| 250 |
|
|
oRequest_TCC <= 0;
|
| 251 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 252 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 253 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 254 |
|
|
|
| 255 |
|
|
if ( iEnable && !iTrigger_TFF )
|
| 256 |
|
|
NextState <= `GFSM_TRIGGER_ROOT_NODE_FETCH;
|
| 257 |
|
|
else if (iEnable && iTrigger_TFF)
|
| 258 |
|
|
NextState <= `GFSM_SET_WBM_INITIAL_ADDRESS;
|
| 259 |
|
|
else
|
| 260 |
|
|
NextState <= `GFSM_INITIAL_STATE;
|
| 261 |
|
|
end
|
| 262 |
|
|
//------------------------------------------
|
| 263 |
|
|
`GFSM_SET_WBM_INITIAL_ADDRESS:
|
| 264 |
|
|
begin
|
| 265 |
|
|
oNodeAddress <= 0;
|
| 266 |
|
|
oRequest_AABBIU <= 0;
|
| 267 |
|
|
oRequest_BIU <= 0;
|
| 268 |
|
|
oTrigger_TFU <= 0;
|
| 269 |
|
|
oTrigger_TNF <= 0;
|
| 270 |
|
|
ClearTriangleCount <= 0;
|
| 271 |
|
|
IncTriangleCount <= 0;
|
| 272 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFF;
|
| 273 |
|
|
oSync <= 0;
|
| 274 |
|
|
oDone <= 0;
|
| 275 |
|
|
oSetTFUAddressOffset <= 0;
|
| 276 |
|
|
oRequest_TCC <= 0;
|
| 277 |
|
|
|
| 278 |
|
|
|
| 279 |
73 |
diegovalve |
oEnable_WBM <= 0;
|
| 280 |
30 |
diegovalve |
oSetAddressWBM <= 1; //*
|
| 281 |
|
|
oSetIOWriteBackAddr <= 1; //Make sure we set write back address
|
| 282 |
|
|
IncTextureCount <= 0;
|
| 283 |
73 |
diegovalve |
IncTextureCoordRegrAddr <= 0;
|
| 284 |
30 |
diegovalve |
|
| 285 |
73 |
diegovalve |
|
| 286 |
30 |
diegovalve |
NextState <= `GFSM_REQUEST_TEXTURE;
|
| 287 |
|
|
|
| 288 |
|
|
end
|
| 289 |
|
|
//------------------------------------
|
| 290 |
|
|
`GFSM_REQUEST_TEXTURE:
|
| 291 |
|
|
begin
|
| 292 |
|
|
oNodeAddress <= 0;
|
| 293 |
|
|
oRequest_AABBIU <= 0;
|
| 294 |
|
|
oRequest_BIU <= 0;
|
| 295 |
|
|
oTrigger_TFU <= 0;
|
| 296 |
|
|
oTrigger_TNF <= 0;
|
| 297 |
|
|
ClearTriangleCount <= 0;
|
| 298 |
|
|
IncTriangleCount <= 0;
|
| 299 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFF;
|
| 300 |
|
|
oSync <= 0;
|
| 301 |
|
|
oDone <= 0;
|
| 302 |
|
|
oSetTFUAddressOffset <= 0;
|
| 303 |
|
|
oRequest_TCC <= 0;
|
| 304 |
|
|
|
| 305 |
73 |
diegovalve |
//$display("GFSM_REQUEST_TEXTURE: Texture Addr in Reg: %d",oAddressWBM);
|
| 306 |
|
|
oEnable_WBM <= 1; //*
|
| 307 |
30 |
diegovalve |
oSetAddressWBM <= 0;
|
| 308 |
|
|
IncTextureCount <= 0; //*
|
| 309 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 310 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 311 |
73 |
diegovalve |
|
| 312 |
30 |
diegovalve |
|
| 313 |
|
|
NextState <= `GFSM_WAIT_FOR_TEXTURE;
|
| 314 |
|
|
end
|
| 315 |
|
|
//------------------------------------
|
| 316 |
|
|
`GFSM_WAIT_FOR_TEXTURE:
|
| 317 |
|
|
begin
|
| 318 |
|
|
oNodeAddress <= 0;
|
| 319 |
|
|
oRequest_AABBIU <= 0;
|
| 320 |
|
|
oRequest_BIU <= 0;
|
| 321 |
|
|
oTrigger_TFU <= 0;
|
| 322 |
|
|
oTrigger_TNF <= 0;
|
| 323 |
|
|
ClearTriangleCount <= 0;
|
| 324 |
|
|
IncTriangleCount <= 0;
|
| 325 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFF;
|
| 326 |
|
|
oSync <= 0;
|
| 327 |
|
|
oDone <= 0;
|
| 328 |
|
|
oSetTFUAddressOffset <= 0;
|
| 329 |
|
|
oRequest_TCC <= 0;
|
| 330 |
|
|
|
| 331 |
|
|
|
| 332 |
|
|
oEnable_WBM <= 1;
|
| 333 |
|
|
oSetAddressWBM <= 0;
|
| 334 |
|
|
//IncTextureWriteAddress <= 0;
|
| 335 |
|
|
IncTextureCount <= 0;
|
| 336 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 337 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 338 |
|
|
//oRAMTextureStoreLocation <= `CREG_TEX_COLOR1;
|
| 339 |
|
|
|
| 340 |
|
|
if ( iDataAvailable )
|
| 341 |
|
|
NextState <= `GFSM_INC_TEXTURE_ADDRESS;
|
| 342 |
|
|
else
|
| 343 |
|
|
NextState <= `GFSM_WAIT_FOR_TEXTURE;
|
| 344 |
|
|
|
| 345 |
|
|
end
|
| 346 |
|
|
//------------------------------------
|
| 347 |
|
|
`GFSM_INC_TEXTURE_ADDRESS:
|
| 348 |
|
|
begin
|
| 349 |
73 |
diegovalve |
//$display("***** GFSM_REQUEST_NEXT_TEXTURE: Texture Addr in Reg: %d",oAddressWBM);
|
| 350 |
30 |
diegovalve |
oNodeAddress <= 0;
|
| 351 |
|
|
oRequest_AABBIU <= 0;
|
| 352 |
|
|
oRequest_BIU <= 0;
|
| 353 |
|
|
oTrigger_TFU <= 0;
|
| 354 |
|
|
oTrigger_TNF <= 0;
|
| 355 |
|
|
ClearTriangleCount <= 0;
|
| 356 |
|
|
IncTriangleCount <= 0;
|
| 357 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFF;
|
| 358 |
|
|
oSync <= 0;
|
| 359 |
|
|
oDone <= 0;
|
| 360 |
|
|
oSetTFUAddressOffset <= 0;
|
| 361 |
|
|
oRequest_TCC <= 0;
|
| 362 |
|
|
|
| 363 |
|
|
oEnable_WBM <= 0;
|
| 364 |
|
|
oSetAddressWBM <= 0;
|
| 365 |
|
|
IncTextureCount <= 1;
|
| 366 |
|
|
//IncTextureWriteAddress <= 0;//1;
|
| 367 |
|
|
IncTextureCoordRegrAddr <= 1; //*
|
| 368 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 369 |
|
|
//oRAMTextureStoreLocation <= `CREG_TEX_COLOR4;
|
| 370 |
|
|
|
| 371 |
|
|
NextState <= `GFSM_SET_NEXT_TEXTURE_ADDR;
|
| 372 |
|
|
end
|
| 373 |
|
|
//------------------------------------
|
| 374 |
|
|
`GFSM_SET_NEXT_TEXTURE_ADDR:
|
| 375 |
|
|
begin
|
| 376 |
|
|
|
| 377 |
73 |
diegovalve |
//$display("***** GFSM_REQUEST_NEXT_TEXTURE: Texture Addr in Reg: %d",oAddressWBM);
|
| 378 |
30 |
diegovalve |
oNodeAddress <= 0;
|
| 379 |
|
|
oRequest_AABBIU <= 0;
|
| 380 |
|
|
oRequest_BIU <= 0;
|
| 381 |
|
|
oTrigger_TFU <= 0;
|
| 382 |
|
|
oTrigger_TNF <= 0;
|
| 383 |
|
|
ClearTriangleCount <= 0;
|
| 384 |
|
|
IncTriangleCount <= 0;
|
| 385 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFF;
|
| 386 |
|
|
oSync <= 0;
|
| 387 |
|
|
oDone <= 0;
|
| 388 |
|
|
oSetTFUAddressOffset <= 0;
|
| 389 |
|
|
oRequest_TCC <= 0;
|
| 390 |
|
|
|
| 391 |
|
|
oEnable_WBM <= 0; //*
|
| 392 |
|
|
oSetAddressWBM <= 1;
|
| 393 |
|
|
IncTextureCount <= 0; //*
|
| 394 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 395 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 396 |
|
|
//oRAMTextureStoreLocation <= `CREG_TEX_COLOR4;
|
| 397 |
|
|
|
| 398 |
|
|
|
| 399 |
|
|
NextState <= `GFSM_REQUEST_NEXT_TEXTURE;
|
| 400 |
|
|
end
|
| 401 |
|
|
//------------------------------------
|
| 402 |
|
|
/*
|
| 403 |
|
|
We request 6 textures (ie. six colors from
|
| 404 |
|
|
the texture coordinates, it should be actually 4
|
| 405 |
|
|
instead of 6, but the hardwardware works better
|
| 406 |
|
|
with numbers that are power of 3. But read 3 at
|
| 407 |
|
|
a time, so when TextureCount Reaches 2 then we
|
| 408 |
|
|
are done
|
| 409 |
|
|
*/
|
| 410 |
|
|
`GFSM_REQUEST_NEXT_TEXTURE:
|
| 411 |
|
|
begin
|
| 412 |
|
|
|
| 413 |
73 |
diegovalve |
//$display("***** GFSM_REQUEST_NEXT_TEXTURE: Texture Addr in Reg: %d",oAddressWBM);
|
| 414 |
30 |
diegovalve |
oNodeAddress <= 0;
|
| 415 |
|
|
oRequest_AABBIU <= 0;
|
| 416 |
|
|
oRequest_BIU <= 0;
|
| 417 |
|
|
oTrigger_TFU <= 0;
|
| 418 |
|
|
oTrigger_TNF <= 0;
|
| 419 |
|
|
ClearTriangleCount <= 0;
|
| 420 |
|
|
IncTriangleCount <= 0;
|
| 421 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFF;
|
| 422 |
|
|
oSync <= 0;
|
| 423 |
|
|
oDone <= 0;
|
| 424 |
|
|
oSetTFUAddressOffset <= 0;
|
| 425 |
|
|
oRequest_TCC <= 0;
|
| 426 |
|
|
|
| 427 |
|
|
oEnable_WBM <= 1; //*
|
| 428 |
|
|
oSetAddressWBM <= 0;
|
| 429 |
|
|
IncTextureCount <= 1; //*
|
| 430 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 431 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 432 |
|
|
//oRAMTextureStoreLocation <= `CREG_TEX_COLOR4;
|
| 433 |
|
|
|
| 434 |
|
|
|
| 435 |
|
|
NextState <= `GFSM_WAIT_FOR_NEXT_TEXTURE;
|
| 436 |
|
|
end
|
| 437 |
|
|
|
| 438 |
|
|
//----------------------------------------
|
| 439 |
|
|
`GFSM_WAIT_FOR_NEXT_TEXTURE:
|
| 440 |
|
|
begin
|
| 441 |
|
|
oNodeAddress <= 0;
|
| 442 |
|
|
oRequest_AABBIU <= 0;
|
| 443 |
|
|
oRequest_BIU <= 0;
|
| 444 |
|
|
oTrigger_TFU <= 0;
|
| 445 |
|
|
oTrigger_TNF <= 0;
|
| 446 |
|
|
ClearTriangleCount <= 0;
|
| 447 |
|
|
IncTriangleCount <= 0;
|
| 448 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFF;
|
| 449 |
|
|
oSync <= 0;
|
| 450 |
|
|
oDone <= 0;
|
| 451 |
|
|
oSetTFUAddressOffset <= 0;
|
| 452 |
|
|
oRequest_TCC <= 0;
|
| 453 |
|
|
|
| 454 |
|
|
|
| 455 |
|
|
oEnable_WBM <= 1;
|
| 456 |
|
|
oSetAddressWBM <= 0;
|
| 457 |
|
|
IncTextureCount <= 0; //*
|
| 458 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 459 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 460 |
|
|
//oRAMTextureStoreLocation <= `CREG_TEX_COLOR4;
|
| 461 |
|
|
|
| 462 |
|
|
if ( iDataAvailable )
|
| 463 |
|
|
NextState <= `GFSM_DONE;
|
| 464 |
|
|
else
|
| 465 |
|
|
NextState <= `GFSM_WAIT_FOR_NEXT_TEXTURE;
|
| 466 |
|
|
|
| 467 |
|
|
end
|
| 468 |
|
|
/****************************************/
|
| 469 |
|
|
/*
|
| 470 |
|
|
Texture Fetch Logic Ends Here.
|
| 471 |
|
|
Geometry Fetch Logic Starts Here (Duh!)
|
| 472 |
|
|
*/
|
| 473 |
|
|
//------------------------------------
|
| 474 |
|
|
/*
|
| 475 |
|
|
Lets request the Root Node read in here.
|
| 476 |
|
|
The tree node function will fetch info such as
|
| 477 |
|
|
the type of node, the address of the first
|
| 478 |
|
|
data block as well as the boundaries of the
|
| 479 |
|
|
AABB.
|
| 480 |
|
|
*/
|
| 481 |
|
|
`GFSM_TRIGGER_ROOT_NODE_FETCH:
|
| 482 |
|
|
begin
|
| 483 |
|
|
// $display("GFSM_TRIGGER_ROOT_NODE_FETCH");
|
| 484 |
|
|
oNodeAddress <= 0; //Address of root node is always zero
|
| 485 |
|
|
oRequest_AABBIU <= 0;
|
| 486 |
|
|
oRequest_BIU <= 0;
|
| 487 |
|
|
oTrigger_TFU <= 0;
|
| 488 |
|
|
oTrigger_TNF <= 1; //*
|
| 489 |
|
|
ClearTriangleCount <= 0;
|
| 490 |
|
|
IncTriangleCount <= 0;
|
| 491 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TNF;
|
| 492 |
|
|
oSync <= 0;
|
| 493 |
|
|
oDone <= 0;
|
| 494 |
|
|
oSetTFUAddressOffset <= 0;
|
| 495 |
|
|
oRequest_TCC <= 0;
|
| 496 |
|
|
|
| 497 |
|
|
oEnable_WBM <= 0;
|
| 498 |
|
|
oSetAddressWBM <= 0;
|
| 499 |
|
|
//IncTextureWriteAddress <= 0;
|
| 500 |
|
|
IncTextureCount <= 0;
|
| 501 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 502 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 503 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 504 |
|
|
|
| 505 |
|
|
NextState <= `GFSM_WAIT_FOR_ROOT_NODE_FETCH;
|
| 506 |
|
|
|
| 507 |
|
|
end
|
| 508 |
|
|
//------------------------------------------
|
| 509 |
|
|
/*
|
| 510 |
|
|
OK once we have the data the first ting is
|
| 511 |
|
|
to test if the ray hits the AABB.
|
| 512 |
|
|
*/
|
| 513 |
|
|
`GFSM_WAIT_FOR_ROOT_NODE_FETCH:
|
| 514 |
|
|
begin
|
| 515 |
|
|
|
| 516 |
|
|
oNodeAddress <= 0;
|
| 517 |
|
|
oRequest_AABBIU <= 0;
|
| 518 |
|
|
oRequest_BIU <= 0;
|
| 519 |
|
|
oTrigger_TFU <= 0;
|
| 520 |
|
|
oTrigger_TNF <= 0;//*
|
| 521 |
|
|
ClearTriangleCount <= 0;
|
| 522 |
|
|
IncTriangleCount <= 0;
|
| 523 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TNF;
|
| 524 |
|
|
oSync <= 0;
|
| 525 |
|
|
oDone <= 0;
|
| 526 |
|
|
oSetTFUAddressOffset <= 0;
|
| 527 |
|
|
oRequest_TCC <= 0;
|
| 528 |
|
|
|
| 529 |
|
|
oEnable_WBM <= 0;
|
| 530 |
|
|
oSetAddressWBM <= 0;
|
| 531 |
|
|
//IncTextureWriteAddress <= 0;
|
| 532 |
|
|
IncTextureCount <= 0;
|
| 533 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 534 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 535 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 536 |
|
|
|
| 537 |
|
|
if (iNodeReadDone)
|
| 538 |
|
|
NextState <= `GFSM_TRIGGER_AABBIU;
|
| 539 |
|
|
else
|
| 540 |
|
|
NextState <= `GFSM_WAIT_FOR_ROOT_NODE_FETCH;
|
| 541 |
|
|
end
|
| 542 |
|
|
//------------------------------------------
|
| 543 |
73 |
diegovalve |
/*
|
| 544 |
|
|
So, while we request AABBIU, we should be requesting
|
| 545 |
|
|
the info for the Next triangle as well...
|
| 546 |
|
|
*/
|
| 547 |
30 |
diegovalve |
`GFSM_TRIGGER_AABBIU:
|
| 548 |
|
|
begin
|
| 549 |
|
|
// $display("GFSM_TRIGGER_AABBIU");
|
| 550 |
|
|
oNodeAddress <= 0;
|
| 551 |
|
|
oRequest_AABBIU <= 1; //*
|
| 552 |
|
|
oRequest_BIU <= 0;
|
| 553 |
73 |
diegovalve |
oTrigger_TFU <= 0; //WIP!!!!!!!!
|
| 554 |
30 |
diegovalve |
oTrigger_TNF <= 0;
|
| 555 |
|
|
ClearTriangleCount <= 0;
|
| 556 |
|
|
IncTriangleCount <= 0;
|
| 557 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 558 |
|
|
oSync <= 1; //*
|
| 559 |
|
|
oDone <= 0;
|
| 560 |
|
|
oSetTFUAddressOffset <= 0;
|
| 561 |
|
|
oRequest_TCC <= 0;
|
| 562 |
|
|
|
| 563 |
|
|
oEnable_WBM <= 0;
|
| 564 |
|
|
oSetAddressWBM <= 0;
|
| 565 |
|
|
//IncTextureWriteAddress <= 0;
|
| 566 |
|
|
IncTextureCount <= 0;
|
| 567 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 568 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 569 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 570 |
|
|
|
| 571 |
|
|
NextState <= `GFSM_WAIT_FOR_AABBIU;
|
| 572 |
|
|
end
|
| 573 |
|
|
//------------------------------------------
|
| 574 |
|
|
`GFSM_WAIT_FOR_AABBIU:
|
| 575 |
|
|
begin
|
| 576 |
|
|
|
| 577 |
|
|
oNodeAddress <= 0;
|
| 578 |
|
|
oRequest_AABBIU <= 1;
|
| 579 |
|
|
oRequest_BIU <= 0;
|
| 580 |
|
|
oTrigger_TFU <= 0;
|
| 581 |
|
|
oTrigger_TNF <= 0;
|
| 582 |
|
|
ClearTriangleCount <= 0;
|
| 583 |
|
|
IncTriangleCount <= 0;
|
| 584 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 585 |
|
|
oSync <= 0;
|
| 586 |
|
|
oDone <= 0;
|
| 587 |
|
|
oSetTFUAddressOffset <= 0;
|
| 588 |
|
|
oRequest_TCC <= 0;
|
| 589 |
|
|
|
| 590 |
|
|
oEnable_WBM <= 0;
|
| 591 |
|
|
oSetAddressWBM <= 0;
|
| 592 |
|
|
//IncTextureWriteAddress <= 0;
|
| 593 |
|
|
IncTextureCount <= 0;
|
| 594 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 595 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 596 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 597 |
|
|
|
| 598 |
|
|
if ( iUCodeDone )
|
| 599 |
|
|
NextState <= `GFSM_ACK_AABBIU;
|
| 600 |
|
|
else
|
| 601 |
|
|
NextState <= `GFSM_WAIT_FOR_AABBIU;
|
| 602 |
|
|
end
|
| 603 |
|
|
//------------------------------------------
|
| 604 |
|
|
`GFSM_ACK_AABBIU:
|
| 605 |
|
|
begin
|
| 606 |
|
|
|
| 607 |
|
|
oNodeAddress <= 0;
|
| 608 |
|
|
oRequest_AABBIU <= 0; //*
|
| 609 |
|
|
oRequest_BIU <= 0;
|
| 610 |
|
|
oTrigger_TFU <= 0;
|
| 611 |
|
|
oTrigger_TNF <= 0;
|
| 612 |
|
|
ClearTriangleCount <= 0;
|
| 613 |
|
|
IncTriangleCount <= 0;
|
| 614 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 615 |
|
|
oSync <= 0;
|
| 616 |
|
|
oDone <= 0;
|
| 617 |
|
|
oSetTFUAddressOffset <= 0;
|
| 618 |
|
|
oRequest_TCC <= 0;
|
| 619 |
|
|
|
| 620 |
|
|
oEnable_WBM <= 0;
|
| 621 |
|
|
oSetAddressWBM <= 0;
|
| 622 |
|
|
//IncTextureWriteAddress <= 0;
|
| 623 |
|
|
IncTextureCount <= 0;
|
| 624 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 625 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 626 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 627 |
|
|
|
| 628 |
|
|
if ( iAABBIUHit )
|
| 629 |
|
|
NextState <= `GFSM_AABBIU_HIT;
|
| 630 |
|
|
else
|
| 631 |
|
|
NextState <= `GFSM_AABBIU_NO_HIT;
|
| 632 |
|
|
end
|
| 633 |
|
|
//------------------------------------------
|
| 634 |
|
|
`GFSM_AABBIU_NO_HIT:
|
| 635 |
|
|
begin
|
| 636 |
|
|
oNodeAddress <= 0;
|
| 637 |
|
|
oRequest_AABBIU <= 0; //*
|
| 638 |
|
|
oRequest_BIU <= 0;
|
| 639 |
|
|
oTrigger_TFU <= 0;
|
| 640 |
|
|
oTrigger_TNF <= 0;
|
| 641 |
|
|
ClearTriangleCount <= 0;
|
| 642 |
|
|
IncTriangleCount <= 0;
|
| 643 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 644 |
|
|
oSync <= 0;
|
| 645 |
|
|
oDone <= 0;
|
| 646 |
|
|
oSetTFUAddressOffset <= 0;
|
| 647 |
|
|
oRequest_TCC <= 0;
|
| 648 |
|
|
|
| 649 |
|
|
oEnable_WBM <= 0;
|
| 650 |
|
|
oSetAddressWBM <= 0;
|
| 651 |
|
|
//IncTextureWriteAddress <= 0;
|
| 652 |
|
|
IncTextureCount <= 0;
|
| 653 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 654 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 655 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 656 |
|
|
|
| 657 |
|
|
|
| 658 |
|
|
NextState <= `GFSM_DONE;
|
| 659 |
|
|
end
|
| 660 |
|
|
//------------------------------------------
|
| 661 |
|
|
/*
|
| 662 |
|
|
Ok there is a hit, two things can happen:
|
| 663 |
|
|
if the Node is not a leaf, then the child nodes
|
| 664 |
|
|
need to be tested.
|
| 665 |
|
|
Else this node's data linked list needs
|
| 666 |
|
|
to be tested for instersections.
|
| 667 |
|
|
Since we have a new Node, lets start by
|
| 668 |
|
|
reading the first 3 blocks of data. The
|
| 669 |
|
|
first block is pointed by
|
| 670 |
|
|
'Node_OffsetData_Address'.
|
| 671 |
|
|
*/
|
| 672 |
|
|
`GFSM_AABBIU_HIT:
|
| 673 |
|
|
begin
|
| 674 |
|
|
|
| 675 |
|
|
oNodeAddress <= 0;
|
| 676 |
|
|
oRequest_AABBIU <= 0;
|
| 677 |
|
|
oRequest_BIU <= 0;
|
| 678 |
|
|
oTrigger_TFU <= 0;
|
| 679 |
|
|
oTrigger_TNF <= 0;
|
| 680 |
|
|
ClearTriangleCount <= 0;
|
| 681 |
|
|
IncTriangleCount <= 0;
|
| 682 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 683 |
|
|
oSync <= 0;
|
| 684 |
|
|
oDone <= 0;
|
| 685 |
|
|
oSetTFUAddressOffset <= 0;
|
| 686 |
|
|
oRequest_TCC <= 0;
|
| 687 |
|
|
|
| 688 |
|
|
oEnable_WBM <= 0;
|
| 689 |
|
|
oSetAddressWBM <= 0;
|
| 690 |
|
|
//IncTextureWriteAddress <= 0;
|
| 691 |
|
|
IncTextureCount <= 0;
|
| 692 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 693 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 694 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 695 |
|
|
|
| 696 |
|
|
if ( iNode_IsLeaf )
|
| 697 |
|
|
NextState <= `GFSM_SET_TRIANGLE_LIST_INITIAL_OFFSET;
|
| 698 |
|
|
else
|
| 699 |
|
|
NextState <= `GFSM_GET_FIRST_CHILD;
|
| 700 |
|
|
end
|
| 701 |
|
|
//------------------------------------------
|
| 702 |
|
|
`GFSM_SET_TRIANGLE_LIST_INITIAL_OFFSET:
|
| 703 |
|
|
begin
|
| 704 |
|
|
oNodeAddress <= 0;
|
| 705 |
|
|
oRequest_AABBIU <= 0;
|
| 706 |
|
|
oRequest_BIU <= 0;
|
| 707 |
|
|
oTrigger_TFU <= 0;
|
| 708 |
|
|
oTrigger_TNF <= 0;
|
| 709 |
|
|
ClearTriangleCount <= 0;
|
| 710 |
|
|
IncTriangleCount <= 0;
|
| 711 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 712 |
|
|
oSync <= 0;
|
| 713 |
|
|
oDone <= 0;
|
| 714 |
|
|
oSetTFUAddressOffset <= 1; //*
|
| 715 |
|
|
oRequest_TCC <= 0;
|
| 716 |
|
|
|
| 717 |
|
|
oEnable_WBM <= 0;
|
| 718 |
|
|
oSetAddressWBM <= 0;
|
| 719 |
|
|
//IncTextureWriteAddress <= 0;
|
| 720 |
|
|
IncTextureCount <= 0;
|
| 721 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 722 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 723 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 724 |
|
|
|
| 725 |
|
|
NextState <= `GFSM_TRIGGER_TRIANGLE_FETCH;
|
| 726 |
|
|
end
|
| 727 |
|
|
//------------------------------------------
|
| 728 |
|
|
/*
|
| 729 |
|
|
Since this node is not a leaf, we keep depth
|
| 730 |
|
|
first deep traversing the hierchy
|
| 731 |
|
|
*/
|
| 732 |
|
|
`GFSM_GET_FIRST_CHILD:
|
| 733 |
|
|
begin
|
| 734 |
|
|
|
| 735 |
|
|
oRequest_AABBIU <= 0;
|
| 736 |
|
|
oNodeAddress <= iNode_FirstChild_Address; //*
|
| 737 |
|
|
oRequest_BIU <= 0;
|
| 738 |
|
|
oTrigger_TFU <= 0;
|
| 739 |
|
|
oTrigger_TNF <= 0;
|
| 740 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 741 |
|
|
ClearTriangleCount <= 0;
|
| 742 |
|
|
IncTriangleCount <= 0;
|
| 743 |
|
|
oSync <= 0;
|
| 744 |
|
|
oDone <= 0;
|
| 745 |
|
|
oSetTFUAddressOffset <= 0;
|
| 746 |
|
|
oRequest_TCC <= 0;
|
| 747 |
|
|
|
| 748 |
|
|
oEnable_WBM <= 0;
|
| 749 |
|
|
oSetAddressWBM <= 0;
|
| 750 |
|
|
//IncTextureWriteAddress <= 0;
|
| 751 |
|
|
IncTextureCount <= 0;
|
| 752 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 753 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 754 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 755 |
|
|
|
| 756 |
|
|
|
| 757 |
|
|
NextState <= `GFSM_TRIGGER_NODE_FETCH;
|
| 758 |
|
|
end
|
| 759 |
|
|
//------------------------------------------
|
| 760 |
|
|
/*
|
| 761 |
|
|
|
| 762 |
|
|
*/
|
| 763 |
|
|
`GFSM_CHECK_TRIANGLE_COUNT:
|
| 764 |
|
|
begin
|
| 765 |
|
|
|
| 766 |
|
|
oNodeAddress <= 0;
|
| 767 |
|
|
oRequest_AABBIU <= 0;
|
| 768 |
|
|
oRequest_BIU <= 0;
|
| 769 |
|
|
oTrigger_TFU <= 0;
|
| 770 |
|
|
oTrigger_TNF <= 0;
|
| 771 |
|
|
ClearTriangleCount <= 0;
|
| 772 |
|
|
IncTriangleCount <= 0;
|
| 773 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 774 |
|
|
oSync <= 0;
|
| 775 |
|
|
oDone <= 0;
|
| 776 |
|
|
oSetTFUAddressOffset <= 0;
|
| 777 |
|
|
oRequest_TCC <= 0;
|
| 778 |
|
|
|
| 779 |
|
|
oEnable_WBM <= 0;
|
| 780 |
|
|
oSetAddressWBM <= 0;
|
| 781 |
|
|
//IncTextureWriteAddress <= 0;
|
| 782 |
|
|
IncTextureCount <= 0;
|
| 783 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 784 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 785 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 786 |
|
|
|
| 787 |
|
|
`ifdef DEBUG2
|
| 788 |
|
|
$display("Fetching triangle %d of %d ", wTriangleCount,iNode_TriangleCount);
|
| 789 |
|
|
`endif
|
| 790 |
|
|
|
| 791 |
|
|
if ( wTriangleCount == iNode_TriangleCount )
|
| 792 |
|
|
NextState <= `GFSM_CHECK_NEXT_BROTHER;
|
| 793 |
|
|
else
|
| 794 |
73 |
diegovalve |
NextState <=
|
| 795 |
|
|
//`GFSM_TRIGGER_TRIANGLE_FETCH;
|
| 796 |
|
|
`GFSM_TRIGGER_BIU_REQUSET; //NEW NEW PARALLEL IO
|
| 797 |
30 |
diegovalve |
end
|
| 798 |
|
|
//------------------------------------------
|
| 799 |
|
|
`GFSM_TRIGGER_TRIANGLE_FETCH:
|
| 800 |
|
|
begin
|
| 801 |
|
|
|
| 802 |
|
|
oNodeAddress <= 0;
|
| 803 |
|
|
oRequest_AABBIU <= 0;
|
| 804 |
|
|
oRequest_BIU <= 0;
|
| 805 |
|
|
oTrigger_TFU <= 1; //*
|
| 806 |
|
|
oTrigger_TNF <= 0;
|
| 807 |
|
|
ClearTriangleCount <= 0;
|
| 808 |
|
|
IncTriangleCount <= 0;
|
| 809 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFU;
|
| 810 |
|
|
oSync <= 0;
|
| 811 |
|
|
oDone <= 0;
|
| 812 |
|
|
oSetTFUAddressOffset <= 0;
|
| 813 |
|
|
oRequest_TCC <= 0;
|
| 814 |
|
|
|
| 815 |
|
|
oEnable_WBM <= 0;
|
| 816 |
|
|
oSetAddressWBM <= 0;
|
| 817 |
|
|
//IncTextureWriteAddress <= 0;
|
| 818 |
|
|
IncTextureCount <= 0;
|
| 819 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 820 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 821 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 822 |
|
|
|
| 823 |
|
|
NextState <= `GFSM_WAIT_FOR_TRIANGLE_FETCH;
|
| 824 |
|
|
end
|
| 825 |
|
|
//------------------------------------------
|
| 826 |
|
|
|
| 827 |
|
|
/*
|
| 828 |
|
|
iEnable the data fetch and wait for the
|
| 829 |
|
|
operation to complete.
|
| 830 |
|
|
*/
|
| 831 |
|
|
`GFSM_WAIT_FOR_TRIANGLE_FETCH:
|
| 832 |
|
|
begin
|
| 833 |
|
|
|
| 834 |
|
|
oNodeAddress <= 0;
|
| 835 |
|
|
oRequest_AABBIU <= 0;
|
| 836 |
|
|
oRequest_BIU <= 0;
|
| 837 |
|
|
oTrigger_TFU <= 0; //*
|
| 838 |
|
|
oTrigger_TNF <= 0;
|
| 839 |
|
|
ClearTriangleCount <= 0;
|
| 840 |
|
|
IncTriangleCount <= 0;
|
| 841 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFU;
|
| 842 |
|
|
oSync <= 0;
|
| 843 |
|
|
oDone <= 0;
|
| 844 |
|
|
oSetTFUAddressOffset <= 0;
|
| 845 |
|
|
oRequest_TCC <= 0;
|
| 846 |
|
|
|
| 847 |
|
|
oEnable_WBM <= 0;
|
| 848 |
|
|
oSetAddressWBM <= 0;
|
| 849 |
|
|
//IncTextureWriteAddress <= 0;
|
| 850 |
|
|
IncTextureCount <= 0;
|
| 851 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 852 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 853 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 854 |
|
|
|
| 855 |
|
|
if ( iTriangleReadDone )
|
| 856 |
|
|
NextState <= `GFSM_TRIGGER_BIU_REQUSET;
|
| 857 |
|
|
else
|
| 858 |
|
|
NextState <= `GFSM_WAIT_FOR_TRIANGLE_FETCH;
|
| 859 |
|
|
end
|
| 860 |
|
|
|
| 861 |
|
|
//------------------------------------------
|
| 862 |
|
|
/*
|
| 863 |
|
|
Now that we got the traingle vertices in RAM,
|
| 864 |
|
|
lets iEnable the BIU micro-code sub.
|
| 865 |
|
|
*/
|
| 866 |
|
|
`GFSM_TRIGGER_BIU_REQUSET:
|
| 867 |
|
|
begin
|
| 868 |
|
|
|
| 869 |
|
|
`ifdef DEBUG2
|
| 870 |
|
|
$display("******* GFSM_TRIGGER_BIU_REQUSET *******");
|
| 871 |
|
|
`endif
|
| 872 |
|
|
|
| 873 |
|
|
oRequest_AABBIU <= 0;
|
| 874 |
|
|
oNodeAddress <= 0;
|
| 875 |
|
|
oRequest_BIU <= 1; //*
|
| 876 |
73 |
diegovalve |
oTrigger_TFU <=
|
| 877 |
|
|
//0;
|
| 878 |
|
|
1; ///NEW NEW NEW Jan 25 2010, try to put this to 1
|
| 879 |
30 |
diegovalve |
oTrigger_TNF <= 0;
|
| 880 |
|
|
IncTriangleCount <= 1; //*
|
| 881 |
|
|
ClearTriangleCount <= 0;
|
| 882 |
73 |
diegovalve |
oWBM_Addr_Selector <=
|
| 883 |
|
|
//`GFSM_SELECT_NULL;
|
| 884 |
|
|
`GFSM_SELECT_TFU; //NEW NEW Paralell IO
|
| 885 |
30 |
diegovalve |
oSync <= 1;//*
|
| 886 |
|
|
oDone <= 0;
|
| 887 |
|
|
oSetTFUAddressOffset <= 0;
|
| 888 |
|
|
oRequest_TCC <= 0;
|
| 889 |
|
|
|
| 890 |
|
|
oEnable_WBM <= 0;
|
| 891 |
|
|
oSetAddressWBM <= 0;
|
| 892 |
|
|
//IncTextureWriteAddress <= 0;
|
| 893 |
|
|
IncTextureCount <= 0;
|
| 894 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 895 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 896 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 897 |
|
|
|
| 898 |
|
|
NextState <= `GFSM_WAIT_FOR_BIU;
|
| 899 |
|
|
end
|
| 900 |
|
|
//------------------------------------------
|
| 901 |
|
|
/*
|
| 902 |
|
|
Once BIU finishes see have a hit.
|
| 903 |
|
|
There are severals paths to go here depnending on
|
| 904 |
|
|
wethher there was a Hit or Not, and also depending
|
| 905 |
|
|
on whether we the texturing capability enabled.
|
| 906 |
|
|
1) If there was a Hit, but the textures are not enabled,
|
| 907 |
|
|
then keep interating the triangle list.
|
| 908 |
|
|
2) If there was a Hit and the texturing is enabled,
|
| 909 |
|
|
then go to the state that request the texture
|
| 910 |
|
|
coordiantes calculation
|
| 911 |
|
|
3) If there was not a Hit, then keep traversong the
|
| 912 |
|
|
triangle list.
|
| 913 |
|
|
4) If there is neither Hit or no-Hit yet, then keep
|
| 914 |
|
|
waiting is this state.
|
| 915 |
|
|
*/
|
| 916 |
|
|
`GFSM_WAIT_FOR_BIU:
|
| 917 |
|
|
begin
|
| 918 |
|
|
|
| 919 |
|
|
oRequest_AABBIU <= 0;
|
| 920 |
|
|
oNodeAddress <= 0;
|
| 921 |
|
|
oRequest_BIU <= 1; //*
|
| 922 |
|
|
oTrigger_TFU <= 0;
|
| 923 |
|
|
oTrigger_TNF <= 0;
|
| 924 |
|
|
IncTriangleCount <= 0; //*
|
| 925 |
73 |
diegovalve |
oWBM_Addr_Selector <=
|
| 926 |
|
|
//`GFSM_SELECT_NULL;
|
| 927 |
|
|
`GFSM_SELECT_TFU; //NEW NEW Paralell IO
|
| 928 |
30 |
diegovalve |
ClearTriangleCount <= 0;
|
| 929 |
|
|
oSync <= 0;
|
| 930 |
|
|
oDone <= 0;
|
| 931 |
|
|
oSetTFUAddressOffset <= 0;
|
| 932 |
|
|
oRequest_TCC <= 0;
|
| 933 |
|
|
|
| 934 |
|
|
oEnable_WBM <= 0;
|
| 935 |
|
|
oSetAddressWBM <= 0;
|
| 936 |
|
|
//IncTextureWriteAddress <= 0;
|
| 937 |
|
|
IncTextureCount <= 0;
|
| 938 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 939 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 940 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 941 |
|
|
|
| 942 |
|
|
if (iUCodeDone && iBIUHit && !iTexturingEnable)
|
| 943 |
|
|
NextState <= `GFSM_CHECK_TRIANGLE_COUNT;
|
| 944 |
|
|
else if (iUCodeDone && iBIUHit && iTexturingEnable)
|
| 945 |
|
|
NextState <= `GFSM_WAIT_STATE_PRE_TCC;
|
| 946 |
|
|
else if (iUCodeDone && !iBIUHit)
|
| 947 |
|
|
NextState <= `GFSM_CHECK_TRIANGLE_COUNT;
|
| 948 |
|
|
else
|
| 949 |
|
|
NextState <= `GFSM_WAIT_FOR_BIU;
|
| 950 |
|
|
end
|
| 951 |
|
|
//------------------------------------------
|
| 952 |
|
|
/*
|
| 953 |
|
|
Need to wait a extra cycle so that control unit will be able
|
| 954 |
|
|
to get into the wait from geo sync state...it sucks I know...
|
| 955 |
|
|
*/
|
| 956 |
|
|
`GFSM_WAIT_STATE_PRE_TCC:
|
| 957 |
|
|
begin
|
| 958 |
|
|
oRequest_AABBIU <= 0;
|
| 959 |
|
|
oNodeAddress <= 0;
|
| 960 |
|
|
oRequest_BIU <= 1; //*
|
| 961 |
|
|
oTrigger_TFU <= 0;
|
| 962 |
|
|
oTrigger_TNF <= 0;
|
| 963 |
|
|
IncTriangleCount <= 0; //*
|
| 964 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 965 |
|
|
ClearTriangleCount <= 0;
|
| 966 |
|
|
oSync <= 0;
|
| 967 |
|
|
oDone <= 0;
|
| 968 |
|
|
oSetTFUAddressOffset <= 0;
|
| 969 |
|
|
oRequest_TCC <= 0;
|
| 970 |
|
|
|
| 971 |
|
|
oEnable_WBM <= 0;
|
| 972 |
|
|
oSetAddressWBM <= 0;
|
| 973 |
|
|
//IncTextureWriteAddress <= 0;
|
| 974 |
|
|
IncTextureCount <= 0;
|
| 975 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 976 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 977 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 978 |
|
|
|
| 979 |
|
|
NextState <= `GFSM_REQUEST_TCC;
|
| 980 |
|
|
end
|
| 981 |
|
|
//------------------------------------------
|
| 982 |
|
|
|
| 983 |
|
|
/*
|
| 984 |
|
|
This state request CU to trigger TCC, ie the code
|
| 985 |
|
|
that is responsible of generating the 4
|
| 986 |
|
|
memory addresses to get the texture coordinates:
|
| 987 |
|
|
ie: OREG_TEX_COORD1 and OREG_TEX_COORD2, this coordinates are stored, and
|
| 988 |
|
|
they replace the previous coordinates values only
|
| 989 |
|
|
if the current traingle is closer to the camera.
|
| 990 |
|
|
*/
|
| 991 |
|
|
`GFSM_REQUEST_TCC:
|
| 992 |
|
|
begin
|
| 993 |
|
|
|
| 994 |
|
|
// $display("%d GFSM_REQUEST_TCC",$time);
|
| 995 |
|
|
// $display("GFSM_REQUEST_TCC %d oRequest_TCC = %d",$time,oRequest_TCC);
|
| 996 |
|
|
|
| 997 |
|
|
|
| 998 |
|
|
oRequest_AABBIU <= 0;
|
| 999 |
|
|
oNodeAddress <= 0;
|
| 1000 |
|
|
oRequest_BIU <= 0;
|
| 1001 |
|
|
oTrigger_TFU <= 0;
|
| 1002 |
|
|
oTrigger_TNF <= 0;
|
| 1003 |
|
|
IncTriangleCount <= 0;
|
| 1004 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 1005 |
|
|
ClearTriangleCount <= 0;
|
| 1006 |
|
|
oSync <= 1; //*
|
| 1007 |
|
|
oDone <= 0;
|
| 1008 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1009 |
|
|
oRequest_TCC <= 1; //*
|
| 1010 |
|
|
|
| 1011 |
|
|
oEnable_WBM <= 0;
|
| 1012 |
|
|
oSetAddressWBM <= 0;
|
| 1013 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1014 |
|
|
IncTextureCount <= 0;
|
| 1015 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1016 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1017 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1018 |
|
|
|
| 1019 |
|
|
|
| 1020 |
|
|
NextState <= `GFSM_WAIT_FOR_TCC;
|
| 1021 |
|
|
|
| 1022 |
|
|
end
|
| 1023 |
|
|
//------------------------------------------
|
| 1024 |
|
|
/*
|
| 1025 |
|
|
If the textures coordinates are calculted then
|
| 1026 |
|
|
move into the next triangle.
|
| 1027 |
|
|
*/
|
| 1028 |
|
|
`GFSM_WAIT_FOR_TCC:
|
| 1029 |
|
|
begin
|
| 1030 |
|
|
|
| 1031 |
|
|
// $display("GFSM_WAIT_FOR_TCC %d oSync = %d",$time,oSync);
|
| 1032 |
|
|
// $display("GFSM_WAIT_FOR_TCC %d oRequest_TCC = %d",$time,oRequest_TCC);
|
| 1033 |
|
|
|
| 1034 |
|
|
oRequest_AABBIU <= 0;
|
| 1035 |
|
|
oNodeAddress <= 0;
|
| 1036 |
|
|
oRequest_BIU <= 0;
|
| 1037 |
|
|
oTrigger_TFU <= 0;
|
| 1038 |
|
|
oTrigger_TNF <= 0;
|
| 1039 |
|
|
IncTriangleCount <= 0;
|
| 1040 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 1041 |
|
|
ClearTriangleCount <= 0;
|
| 1042 |
|
|
oSync <= 0;
|
| 1043 |
|
|
oDone <= 0;
|
| 1044 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1045 |
|
|
oRequest_TCC <= 1;
|
| 1046 |
|
|
|
| 1047 |
|
|
oEnable_WBM <= 0;
|
| 1048 |
|
|
oSetAddressWBM <= 0;
|
| 1049 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1050 |
|
|
IncTextureCount <= 0;
|
| 1051 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1052 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1053 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1054 |
|
|
|
| 1055 |
|
|
if (iUCodeDone)
|
| 1056 |
|
|
NextState <= `GFSM_CHECK_TRIANGLE_COUNT;
|
| 1057 |
|
|
else
|
| 1058 |
|
|
NextState <= `GFSM_WAIT_FOR_TCC;
|
| 1059 |
|
|
end
|
| 1060 |
|
|
//------------------------------------------
|
| 1061 |
|
|
/* `GFM_TRIGGER_TEXTURE_FETCH:
|
| 1062 |
|
|
begin
|
| 1063 |
|
|
oRequest_AABBIU <= 0;
|
| 1064 |
|
|
oNodeAddress <= 0;
|
| 1065 |
|
|
oRequest_BIU <= 0;
|
| 1066 |
|
|
oTrigger_TFU <= 0;
|
| 1067 |
|
|
oTrigger_TNF <= 0;
|
| 1068 |
|
|
IncTriangleCount <= 0;
|
| 1069 |
|
|
oWBM_Addr_Selector <= 0;
|
| 1070 |
|
|
ClearTriangleCount <= 0;
|
| 1071 |
|
|
oSync <= 0;
|
| 1072 |
|
|
oDone <= 0;
|
| 1073 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1074 |
|
|
oTrigger_TFF <= 1;
|
| 1075 |
|
|
|
| 1076 |
|
|
NextState <= `GFSM_WAIT_FOR_TEXTURE_FETCH;
|
| 1077 |
|
|
end
|
| 1078 |
|
|
|
| 1079 |
|
|
//------------------------------------------
|
| 1080 |
|
|
`GFSM_WAIT_FOR_TEXTURE_FETCH:
|
| 1081 |
|
|
begin
|
| 1082 |
|
|
|
| 1083 |
|
|
oRequest_AABBIU <= 0;
|
| 1084 |
|
|
oNodeAddress <= 0;
|
| 1085 |
|
|
oRequest_BIU <= 0;
|
| 1086 |
|
|
oTrigger_TFU <= 0;
|
| 1087 |
|
|
oTrigger_TNF <= 0;
|
| 1088 |
|
|
IncTriangleCount <= 0;
|
| 1089 |
|
|
oWBM_Addr_Selector <= 0;
|
| 1090 |
|
|
ClearTriangleCount <= 0;
|
| 1091 |
|
|
oSync <= 0;
|
| 1092 |
|
|
oDone <= 0;
|
| 1093 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1094 |
|
|
oTrigger_TFF <= 0;
|
| 1095 |
|
|
|
| 1096 |
|
|
if (iTextureReadDone == 1'b1)
|
| 1097 |
|
|
NextState <= `GFSM_CHECK_TRIANGLE_COUNT;
|
| 1098 |
|
|
else
|
| 1099 |
|
|
NextState <= `GFSM_WAIT_FOR_TEXTURE_FETCH;
|
| 1100 |
|
|
|
| 1101 |
|
|
end
|
| 1102 |
|
|
*/
|
| 1103 |
|
|
//------------------------------------------
|
| 1104 |
|
|
`GFSM_CHECK_NEXT_BROTHER:
|
| 1105 |
|
|
begin
|
| 1106 |
|
|
|
| 1107 |
|
|
oRequest_AABBIU <= 0;
|
| 1108 |
|
|
oNodeAddress <= 0;
|
| 1109 |
|
|
oRequest_BIU <= 0;
|
| 1110 |
|
|
oTrigger_TFU <= 0;
|
| 1111 |
|
|
oTrigger_TNF <= 0;
|
| 1112 |
|
|
IncTriangleCount <= 0; //*
|
| 1113 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 1114 |
|
|
ClearTriangleCount <= 0;
|
| 1115 |
|
|
oSync <= 0;
|
| 1116 |
|
|
oDone <= 0;
|
| 1117 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1118 |
|
|
oRequest_TCC <= 0;
|
| 1119 |
|
|
|
| 1120 |
|
|
oEnable_WBM <= 0;
|
| 1121 |
|
|
oSetAddressWBM <= 0;
|
| 1122 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1123 |
|
|
IncTextureCount <= 0;
|
| 1124 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1125 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1126 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1127 |
|
|
|
| 1128 |
|
|
if ( iNode_Brother_Address == 0 )
|
| 1129 |
|
|
NextState <= `GFSM_CHECK_PARENTS_BROTHER;
|
| 1130 |
|
|
else
|
| 1131 |
|
|
NextState <= `GFSM_GET_BROTHER;
|
| 1132 |
|
|
end
|
| 1133 |
|
|
//------------------------------------------
|
| 1134 |
|
|
`GFSM_GET_BROTHER:
|
| 1135 |
|
|
begin
|
| 1136 |
|
|
|
| 1137 |
|
|
oRequest_AABBIU <= 0;
|
| 1138 |
|
|
oNodeAddress <= iNode_Brother_Address; //*
|
| 1139 |
|
|
oRequest_BIU <= 0;
|
| 1140 |
|
|
oTrigger_TFU <= 0;
|
| 1141 |
|
|
oTrigger_TNF <= 0;
|
| 1142 |
|
|
IncTriangleCount <= 0; //*
|
| 1143 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 1144 |
|
|
ClearTriangleCount <= 0;
|
| 1145 |
|
|
oSync <= 0;
|
| 1146 |
|
|
oDone <= 0;
|
| 1147 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1148 |
|
|
oRequest_TCC <= 0;
|
| 1149 |
|
|
|
| 1150 |
|
|
oEnable_WBM <= 0;
|
| 1151 |
|
|
oSetAddressWBM <= 0;
|
| 1152 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1153 |
|
|
IncTextureCount <= 0;
|
| 1154 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1155 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1156 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1157 |
|
|
|
| 1158 |
|
|
|
| 1159 |
|
|
NextState <= `GFSM_TRIGGER_NODE_FETCH;
|
| 1160 |
|
|
end
|
| 1161 |
|
|
//------------------------------------------
|
| 1162 |
|
|
`GFSM_CHECK_PARENTS_BROTHER:
|
| 1163 |
|
|
begin
|
| 1164 |
|
|
|
| 1165 |
|
|
|
| 1166 |
|
|
oNodeAddress <= 0;
|
| 1167 |
|
|
oRequest_AABBIU <= 0;
|
| 1168 |
|
|
oRequest_BIU <= 0;
|
| 1169 |
|
|
oTrigger_TFU <= 0;
|
| 1170 |
|
|
oTrigger_TNF <= 0;
|
| 1171 |
|
|
IncTriangleCount <= 0; //*
|
| 1172 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 1173 |
|
|
ClearTriangleCount <= 0;
|
| 1174 |
|
|
oSync <= 0;
|
| 1175 |
|
|
oDone <= 0;
|
| 1176 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1177 |
|
|
oRequest_TCC <= 0;
|
| 1178 |
|
|
|
| 1179 |
|
|
oEnable_WBM <= 0;
|
| 1180 |
|
|
oSetAddressWBM <= 0;
|
| 1181 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1182 |
|
|
IncTextureCount <= 0;
|
| 1183 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1184 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1185 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1186 |
|
|
|
| 1187 |
|
|
if ( iNode_Parents_Brother_Address == 0)
|
| 1188 |
|
|
NextState <= `GFSM_DONE;
|
| 1189 |
|
|
else
|
| 1190 |
|
|
NextState <= `GFSM_GET_PARENTS_BROTHER;
|
| 1191 |
|
|
end
|
| 1192 |
|
|
//------------------------------------------
|
| 1193 |
|
|
`GFSM_GET_PARENTS_BROTHER:
|
| 1194 |
|
|
begin
|
| 1195 |
|
|
oRequest_AABBIU <= 0;
|
| 1196 |
|
|
oNodeAddress <= iNode_Parents_Brother_Address; //*
|
| 1197 |
|
|
oRequest_BIU <= 0;
|
| 1198 |
|
|
oTrigger_TFU <= 0;
|
| 1199 |
|
|
oTrigger_TNF <= 0;
|
| 1200 |
|
|
IncTriangleCount <= 0; //*
|
| 1201 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 1202 |
|
|
ClearTriangleCount <= 0;
|
| 1203 |
|
|
oSync <= 0;
|
| 1204 |
|
|
oDone <= 0;
|
| 1205 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1206 |
|
|
oRequest_TCC <= 0;
|
| 1207 |
|
|
|
| 1208 |
|
|
oEnable_WBM <= 0;
|
| 1209 |
|
|
oSetAddressWBM <= 0;
|
| 1210 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1211 |
|
|
IncTextureCount <= 0;
|
| 1212 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1213 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1214 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1215 |
|
|
|
| 1216 |
|
|
|
| 1217 |
|
|
NextState <= `GFSM_TRIGGER_NODE_FETCH;
|
| 1218 |
|
|
end
|
| 1219 |
|
|
//------------------------------------------
|
| 1220 |
|
|
`GFSM_TRIGGER_NODE_FETCH:
|
| 1221 |
|
|
begin
|
| 1222 |
|
|
|
| 1223 |
|
|
oRequest_AABBIU <= 0;
|
| 1224 |
|
|
oNodeAddress <= iNode_Brother_Address;
|
| 1225 |
|
|
oRequest_BIU <= 0;
|
| 1226 |
|
|
oTrigger_TFU <= 1; //*
|
| 1227 |
|
|
oTrigger_TNF <= 0;
|
| 1228 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 1229 |
|
|
IncTriangleCount <= 0; //*
|
| 1230 |
|
|
ClearTriangleCount <= 0;
|
| 1231 |
|
|
oSync <= 0;
|
| 1232 |
|
|
oDone <= 0;
|
| 1233 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1234 |
|
|
oRequest_TCC <= 0;
|
| 1235 |
|
|
|
| 1236 |
|
|
oEnable_WBM <= 0;
|
| 1237 |
|
|
oSetAddressWBM <= 0;
|
| 1238 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1239 |
|
|
IncTextureCount <= 0;
|
| 1240 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1241 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1242 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1243 |
|
|
|
| 1244 |
|
|
|
| 1245 |
|
|
NextState <= `GFSM_WAIT_FOR_NODE_FETCH;
|
| 1246 |
|
|
end
|
| 1247 |
|
|
//------------------------------------------
|
| 1248 |
|
|
/*
|
| 1249 |
|
|
Lets read the new node in our linked list.
|
| 1250 |
|
|
Once we got it we need to check AABB intersect,
|
| 1251 |
|
|
fetch traingles, etc, etc.
|
| 1252 |
|
|
*/
|
| 1253 |
|
|
`GFSM_WAIT_FOR_NODE_FETCH:
|
| 1254 |
|
|
begin
|
| 1255 |
|
|
|
| 1256 |
|
|
oRequest_AABBIU <= 0;
|
| 1257 |
|
|
oNodeAddress <= iNode_Brother_Address;
|
| 1258 |
|
|
oRequest_BIU <= 0;
|
| 1259 |
|
|
oTrigger_TFU <= 1;
|
| 1260 |
|
|
oTrigger_TNF <= 0;
|
| 1261 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_TFU;
|
| 1262 |
|
|
IncTriangleCount <= 0; //*
|
| 1263 |
|
|
ClearTriangleCount <= 0;
|
| 1264 |
|
|
oSync <= 0;
|
| 1265 |
|
|
oDone <= 0;
|
| 1266 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1267 |
|
|
oRequest_TCC <= 0;
|
| 1268 |
|
|
|
| 1269 |
|
|
oEnable_WBM <= 0;
|
| 1270 |
|
|
oSetAddressWBM <= 0;
|
| 1271 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1272 |
|
|
IncTextureCount <= 0;
|
| 1273 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1274 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1275 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1276 |
|
|
|
| 1277 |
|
|
if (iNodeReadDone)
|
| 1278 |
|
|
NextState <= `GFSM_TRIGGER_AABBIU;
|
| 1279 |
|
|
else
|
| 1280 |
|
|
NextState <= `GFSM_WAIT_FOR_NODE_FETCH;
|
| 1281 |
|
|
end
|
| 1282 |
|
|
//------------------------------------------
|
| 1283 |
|
|
`GFSM_DONE:
|
| 1284 |
|
|
begin
|
| 1285 |
|
|
|
| 1286 |
|
|
`ifdef DEBUG2
|
| 1287 |
|
|
$display(" **** GFSM_DONE ***");
|
| 1288 |
|
|
`endif
|
| 1289 |
|
|
oNodeAddress <= 0;
|
| 1290 |
|
|
oRequest_AABBIU <= 0;
|
| 1291 |
|
|
oRequest_BIU <= 0;
|
| 1292 |
|
|
oTrigger_TFU <= 0;
|
| 1293 |
|
|
oTrigger_TNF <= 0;
|
| 1294 |
|
|
IncTriangleCount <= 0; //*
|
| 1295 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 1296 |
|
|
ClearTriangleCount <= 0;
|
| 1297 |
|
|
oSync <= 1; //*
|
| 1298 |
|
|
oDone <= 1; //*
|
| 1299 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1300 |
|
|
oRequest_TCC <= 0;
|
| 1301 |
|
|
|
| 1302 |
|
|
oEnable_WBM <= 0;
|
| 1303 |
|
|
oSetAddressWBM <= 0;
|
| 1304 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1305 |
|
|
IncTextureCount <= 0;
|
| 1306 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1307 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1308 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1309 |
|
|
|
| 1310 |
|
|
|
| 1311 |
|
|
if (iEnable == 0 )
|
| 1312 |
|
|
NextState <= `GFSM_INITIAL_STATE;
|
| 1313 |
|
|
else
|
| 1314 |
|
|
NextState <= `GFSM_DONE;
|
| 1315 |
|
|
end
|
| 1316 |
|
|
//------------------------------------------
|
| 1317 |
|
|
default:
|
| 1318 |
|
|
begin
|
| 1319 |
|
|
|
| 1320 |
|
|
|
| 1321 |
|
|
oRequest_AABBIU <= 0;
|
| 1322 |
|
|
oNodeAddress <= 0;
|
| 1323 |
|
|
oRequest_BIU <= 0;
|
| 1324 |
|
|
oTrigger_TFU <= 0;
|
| 1325 |
|
|
oTrigger_TNF <= 0;
|
| 1326 |
|
|
oWBM_Addr_Selector <= `GFSM_SELECT_NULL;
|
| 1327 |
|
|
IncTriangleCount <= 0; //*
|
| 1328 |
|
|
oWBM_Addr_Selector <= 0;
|
| 1329 |
|
|
ClearTriangleCount <= 0;
|
| 1330 |
|
|
oSync <= 0;
|
| 1331 |
|
|
oDone <= 0;
|
| 1332 |
|
|
oSetTFUAddressOffset <= 0;
|
| 1333 |
|
|
oRequest_TCC <= 0;
|
| 1334 |
|
|
|
| 1335 |
|
|
oEnable_WBM <= 0;
|
| 1336 |
|
|
oSetAddressWBM <= 0;
|
| 1337 |
|
|
//IncTextureWriteAddress <= 0;
|
| 1338 |
|
|
IncTextureCount <= 0;
|
| 1339 |
|
|
IncTextureCoordRegrAddr <= 0;
|
| 1340 |
|
|
oSetIOWriteBackAddr <= 0;
|
| 1341 |
|
|
//oRAMTextureStoreLocation <= `DATA_ADDRESS_WIDTH'd0;
|
| 1342 |
|
|
|
| 1343 |
|
|
|
| 1344 |
|
|
NextState <= `GFSM_AFTER_RESET;
|
| 1345 |
|
|
end
|
| 1346 |
|
|
endcase
|
| 1347 |
|
|
end
|
| 1348 |
|
|
//------------------------------------------------
|
| 1349 |
|
|
endmodule
|
