src/mesa/drivers/dri/r300/r300_vertprog.c

   1 /**************************************************************************
   2
   3 Copyright (C) 2005  Aapo Tahkola <aet@rasterburn.org>
   4 Copyright (C) 2008  Oliver McFadden <z3ro.geek@gmail.com>
   5
   6 All Rights Reserved.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining a
   9 copy of this software and associated documentation files (the "Software"),
  10 to deal in the Software without restriction, including without limitation
  11 on the rights to use, copy, modify, merge, publish, distribute, sub
  12 license, and/or sell copies of the Software, and to permit persons to whom
  13 the Software is furnished to do so, subject to the following conditions:
  14
  15 The above copyright notice and this permission notice (including the next
  16 paragraph) shall be included in all copies or substantial portions of the
  17 Software.
  18
  19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  22 THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  23 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  24 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  25 USE OR OTHER DEALINGS IN THE SOFTWARE.
  26
  27 **************************************************************************/
  28
  29 /* Radeon R5xx Acceleration, Revision 1.2 */
  30
  31 #include "main/glheader.h"
  32 #include "main/macros.h"
  33 #include "main/enums.h"
  34 #include "program/program.h"
  35 #include "program/programopt.h"
  36 #include "program/prog_instruction.h"
  37 #include "program/prog_parameter.h"
  38 #include "program/prog_print.h"
  39 #include "program/prog_statevars.h"
  40 #include "tnl/tnl.h"
  41
  42 #include "compiler/radeon_compiler.h"
  43 #include "radeon_mesa_to_rc.h"
  44 #include "r300_context.h"
  45 #include "r300_fragprog_common.h"
  46 #include "r300_state.h"
  47
  48 /**
  49  * Write parameter array for the given vertex program into dst.
  50  * Return the total number of components written.
  51  */
  52 static int r300VertexProgUpdateParams(GLcontext * ctx, struct r300_vertex_program *vp, float *dst)
  53 {
  54         int i;
  55
  56         if (vp->Base->IsNVProgram) {
  57                 _mesa_load_tracked_matrices(ctx);
  58         } else {
  59                 if (vp->Base->Base.Parameters) {
  60                         _mesa_load_state_parameters(ctx, vp->Base->Base.Parameters);
  61                 }
  62         }
  63
  64         for(i = 0; i < vp->code.constants.Count; ++i) {
  65                 const float * src = 0;
  66                 const struct rc_constant * constant = &vp->code.constants.Constants[i];
  67
  68                 switch(constant->Type) {
  69                 case RC_CONSTANT_EXTERNAL:
  70                         if (vp->Base->IsNVProgram) {
  71                                 src = ctx->VertexProgram.Parameters[constant->u.External];
  72                         } else {
  73                                 src = vp->Base->Base.Parameters->ParameterValues[constant->u.External];
  74                         }
  75                         break;
  76
  77                 case RC_CONSTANT_IMMEDIATE:
  78                         src = constant->u.Immediate;
  79                         break;
  80                 }
  81
  82                 assert(src);
  83                 dst[4*i] = src[0];
  84                 dst[4*i + 1] = src[1];
  85                 dst[4*i + 2] = src[2];
  86                 dst[4*i + 3] = src[3];
  87         }
  88
  89         return 4 * vp->code.constants.Count;
  90 }
  91
  92 static GLbitfield compute_required_outputs(struct gl_vertex_program * vp, GLbitfield fpreads)
  93 {
  94         GLbitfield outputs = 0;
  95         int i;
  96
  97 #define ADD_OUTPUT(fp_attr, vp_result) \
  98         do { \
  99                 if (fpreads & (1 << (fp_attr))) \
 100                         outputs |= (1 << (vp_result)); \
 101         } while (0)
 102
 103         ADD_OUTPUT(FRAG_ATTRIB_COL0, VERT_RESULT_COL0);
 104         ADD_OUTPUT(FRAG_ATTRIB_COL1, VERT_RESULT_COL1);
 105
 106         for (i = 0; i <= 7; ++i) {
 107                 ADD_OUTPUT(FRAG_ATTRIB_TEX0 + i, VERT_RESULT_TEX0 + i);
 108         }
 109
 110 #undef ADD_OUTPUT
 111
 112         if ((fpreads & (1 << FRAG_ATTRIB_COL0)) &&
 113             (vp->Base.OutputsWritten & (1 << VERT_RESULT_BFC0)))
 114                 outputs |= 1 << VERT_RESULT_BFC0;
 115         if ((fpreads & (1 << FRAG_ATTRIB_COL1)) &&
 116             (vp->Base.OutputsWritten & (1 << VERT_RESULT_BFC1)))
 117                 outputs |= 1 << VERT_RESULT_BFC1;
 118
 119         outputs |= 1 << VERT_RESULT_HPOS;
 120         if (vp->Base.OutputsWritten & (1 << VERT_RESULT_PSIZ))
 121                 outputs |= 1 << VERT_RESULT_PSIZ;
 122
 123         return outputs;
 124 }
 125
 126
 127 static void t_inputs_outputs(struct r300_vertex_program_compiler * c)
 128 {
 129         int i;
 130         int cur_reg;
 131         GLuint OutputsWritten, InputsRead;
 132
 133         OutputsWritten = c->Base.Program.OutputsWritten;
 134         InputsRead = c->Base.Program.InputsRead;
 135
 136         cur_reg = -1;
 137         for (i = 0; i < VERT_ATTRIB_MAX; i++) {
 138                 if (InputsRead & (1 << i))
 139                         c->code->inputs[i] = ++cur_reg;
 140                 else
 141                         c->code->inputs[i] = -1;
 142         }
 143
 144         cur_reg = 0;
 145         for (i = 0; i < VERT_RESULT_MAX; i++)
 146                 c->code->outputs[i] = -1;
 147
 148         assert(OutputsWritten & (1 << VERT_RESULT_HPOS));
 149
 150         if (OutputsWritten & (1 << VERT_RESULT_HPOS)) {
 151                 c->code->outputs[VERT_RESULT_HPOS] = cur_reg++;
 152         }
 153
 154         if (OutputsWritten & (1 << VERT_RESULT_PSIZ)) {
 155                 c->code->outputs[VERT_RESULT_PSIZ] = cur_reg++;
 156         }
 157
 158         /* If we're writing back facing colors we need to send
 159          * four colors to make front/back face colors selection work.
 160          * If the vertex program doesn't write all 4 colors, lets
 161          * pretend it does by skipping output index reg so the colors
 162          * get written into appropriate output vectors.
 163          */
 164         if (OutputsWritten & (1 << VERT_RESULT_COL0)) {
 165                 c->code->outputs[VERT_RESULT_COL0] = cur_reg++;
 166         } else if (OutputsWritten & (1 << VERT_RESULT_BFC0) ||
 167                 OutputsWritten & (1 << VERT_RESULT_BFC1)) {
 168                 cur_reg++;
 169         }
 170
 171         if (OutputsWritten & (1 << VERT_RESULT_COL1)) {
 172                 c->code->outputs[VERT_RESULT_COL1] = cur_reg++;
 173         } else if (OutputsWritten & (1 << VERT_RESULT_BFC0) ||
 174                 OutputsWritten & (1 << VERT_RESULT_BFC1)) {
 175                 cur_reg++;
 176         }
 177
 178         if (OutputsWritten & (1 << VERT_RESULT_BFC0)) {
 179                 c->code->outputs[VERT_RESULT_BFC0] = cur_reg++;
 180         } else if (OutputsWritten & (1 << VERT_RESULT_BFC1)) {
 181                 cur_reg++;
 182         }
 183
 184         if (OutputsWritten & (1 << VERT_RESULT_BFC1)) {
 185                 c->code->outputs[VERT_RESULT_BFC1] = cur_reg++;
 186         } else if (OutputsWritten & (1 << VERT_RESULT_BFC0)) {
 187                 cur_reg++;
 188         }
 189
 190         for (i = VERT_RESULT_TEX0; i <= VERT_RESULT_TEX7; i++) {
 191                 if (OutputsWritten & (1 << i)) {
 192                         c->code->outputs[i] = cur_reg++;
 193                 }
 194         }
 195
 196         if (OutputsWritten & (1 << VERT_RESULT_FOGC)) {
 197                 c->code->outputs[VERT_RESULT_FOGC] = cur_reg++;
 198         }
 199 }
 200
 201 /**
 202  * The NV_vertex_program spec mandates that all registers be
 203  * initialized to zero. We do this here unconditionally.
 204  *
 205  * \note We rely on dead-code elimination in the compiler.
 206  */
 207 static void initialize_NV_registers(struct radeon_compiler * compiler)
 208 {
 209         unsigned int reg;
 210         struct rc_instruction * inst;
 211
 212         for(reg = 0; reg < 12; ++reg) {
 213                 inst = rc_insert_new_instruction(compiler, &compiler->Program.Instructions);
 214                 inst->U.I.Opcode = RC_OPCODE_MOV;
 215                 inst->U.I.DstReg.File = RC_FILE_TEMPORARY;
 216                 inst->U.I.DstReg.Index = reg;
 217                 inst->U.I.SrcReg[0].File = RC_FILE_NONE;
 218                 inst->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_0000;
 219         }
 220
 221         inst = rc_insert_new_instruction(compiler, &compiler->Program.Instructions);
 222         inst->U.I.Opcode = RC_OPCODE_ARL;
 223         inst->U.I.DstReg.File = RC_FILE_ADDRESS;
 224         inst->U.I.DstReg.Index = 0;
 225         inst->U.I.DstReg.WriteMask = WRITEMASK_X;
 226         inst->U.I.SrcReg[0].File = RC_FILE_NONE;
 227         inst->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_0000;
 228 }
 229
 230 static struct r300_vertex_program *build_program(GLcontext *ctx,
 231                                                  struct r300_vertex_program_key *wanted_key,
 232                                                  const struct gl_vertex_program *mesa_vp)
 233 {
 234         struct r300_vertex_program *vp;
 235         struct r300_vertex_program_compiler compiler;
 236
 237         vp = calloc(1, sizeof(*vp));
 238         vp->Base = _mesa_clone_vertex_program(ctx, mesa_vp);
 239         memcpy(&vp->key, wanted_key, sizeof(vp->key));
 240
 241         rc_init(&compiler.Base);
 242         compiler.Base.Debug = (RADEON_DEBUG & RADEON_VERTS) ? GL_TRUE : GL_FALSE;
 243
 244         compiler.code = &vp->code;
 245         compiler.RequiredOutputs = compute_required_outputs(vp->Base, vp->key.FpReads);
 246         compiler.SetHwInputOutput = &t_inputs_outputs;
 247         compiler.Base.is_r500 = R300_CONTEXT(ctx)->radeon.radeonScreen->chip_family >= CHIP_FAMILY_RV515;
 248         compiler.Base.max_temp_regs = 32;
 249         compiler.Base.max_constants = 256;
 250         compiler.Base.max_alu_insts = compiler.Base.is_r500 ? 1024 : 256;
 251
 252         if (compiler.Base.Debug) {
 253                 fprintf(stderr, "Initial vertex program:\n");
 254                 _mesa_print_program(&vp->Base->Base);
 255                 fflush(stderr);
 256         }
 257
 258         if (mesa_vp->IsPositionInvariant) {
 259                 _mesa_insert_mvp_code(ctx, vp->Base);
 260         }
 261
 262         radeon_mesa_to_rc_program(&compiler.Base, &vp->Base->Base);
 263
 264         if (mesa_vp->IsNVProgram)
 265                 initialize_NV_registers(&compiler.Base);
 266
 267         rc_move_output(&compiler.Base, VERT_RESULT_PSIZ, VERT_RESULT_PSIZ, WRITEMASK_X);
 268
 269         if (vp->key.WPosAttr != FRAG_ATTRIB_MAX) {
 270                 unsigned int vp_wpos_attr = vp->key.WPosAttr - FRAG_ATTRIB_TEX0 + VERT_RESULT_TEX0;
 271
 272                 /* Set empty writemask for instructions writing to vp_wpos_attr
 273                  * before moving the wpos attr there.
 274                  * Such instructions will be removed by DCE.
 275                  */
 276                 rc_move_output(&compiler.Base, vp_wpos_attr, vp->key.WPosAttr, 0);
 277                 rc_copy_output(&compiler.Base, VERT_RESULT_HPOS, vp_wpos_attr);
 278         }
 279
 280         if (vp->key.FogAttr != FRAG_ATTRIB_MAX) {
 281                 unsigned int vp_fog_attr = vp->key.FogAttr - FRAG_ATTRIB_TEX0 + VERT_RESULT_TEX0;
 282
 283                 /* Set empty writemask for instructions writing to vp_fog_attr
 284                  * before moving the fog attr there.
 285                  * Such instructions will be removed by DCE.
 286                  */
 287                 rc_move_output(&compiler.Base, vp_fog_attr, vp->key.FogAttr, 0);
 288                 rc_move_output(&compiler.Base, VERT_RESULT_FOGC, vp_fog_attr, WRITEMASK_X);
 289         }
 290
 291         r3xx_compile_vertex_program(&compiler);
 292
 293         if (vp->code.constants.Count > ctx->Const.VertexProgram.MaxParameters) {
 294                 rc_error(&compiler.Base, "Program exceeds constant buffer size limit\n");
 295         }
 296
 297         vp->error = compiler.Base.Error;
 298
 299         vp->Base->Base.InputsRead = vp->code.InputsRead;
 300         vp->Base->Base.OutputsWritten = vp->code.OutputsWritten;
 301
 302         rc_destroy(&compiler.Base);
 303
 304         return vp;
 305 }
 306
 307 struct r300_vertex_program * r300SelectAndTranslateVertexShader(GLcontext *ctx)
 308 {
 309         r300ContextPtr r300 = R300_CONTEXT(ctx);
 310         struct r300_vertex_program_key wanted_key = { 0 };
 311         struct r300_vertex_program_cont *vpc;
 312         struct r300_vertex_program *vp;
 313
 314         vpc = (struct r300_vertex_program_cont *)ctx->VertexProgram._Current;
 315
 316         if (!r300->selected_fp) {
 317                 /* This can happen when GetProgramiv is called to check
 318                  * whether the program runs natively.
 319                  *
 320                  * To be honest, this is not a very good solution,
 321                  * but solving the problem of reporting good values
 322                  * for those queries is tough anyway considering that
 323                  * we recompile vertex programs based on the precise
 324                  * fragment program that is in use.
 325                  */
 326                 r300SelectAndTranslateFragmentShader(ctx);
 327         }
 328
 329         assert(r300->selected_fp);
 330         wanted_key.FpReads = r300->selected_fp->InputsRead;
 331         wanted_key.FogAttr = r300->selected_fp->fog_attr;
 332         wanted_key.WPosAttr = r300->selected_fp->wpos_attr;
 333
 334         for (vp = vpc->progs; vp; vp = vp->next) {
 335                 if (memcmp(&vp->key, &wanted_key, sizeof(wanted_key)) == 0) {
 336                         return r300->selected_vp = vp;
 337                 }
 338         }
 339
 340         vp = build_program(ctx, &wanted_key, &vpc->mesa_program);
 341         vp->next = vpc->progs;
 342         vpc->progs = vp;
 343
 344         return r300->selected_vp = vp;
 345 }
 346
 347 #define bump_vpu_count(ptr, new_count)   do { \
 348                 drm_r300_cmd_header_t* _p=((drm_r300_cmd_header_t*)(ptr)); \
 349                 int _nc=(new_count)/4; \
 350                 if(_nc>_p->vpu.count)_p->vpu.count=_nc; \
 351         } while(0)
 352
 353 static void r300EmitVertexProgram(r300ContextPtr r300, int dest, struct r300_vertex_program_code *code)
 354 {
 355         int i;
 356
 357         assert((code->length > 0) && (code->length % 4 == 0));
 358
 359         switch ((dest >> 8) & 0xf) {
 360                 case 0:
 361                         R300_STATECHANGE(r300, vpi);
 362                         for (i = 0; i < code->length; i++)
 363                                 r300->hw.vpi.cmd[R300_VPI_INSTR_0 + i + 4 * (dest & 0xff)] = (code->body.d[i]);
 364                         bump_vpu_count(r300->hw.vpi.cmd, code->length + 4 * (dest & 0xff));
 365                         break;
 366                 case 2:
 367                         R300_STATECHANGE(r300, vpp);
 368                         for (i = 0; i < code->length; i++)
 369                                 r300->hw.vpp.cmd[R300_VPP_PARAM_0 + i + 4 * (dest & 0xff)] = (code->body.d[i]);
 370                         bump_vpu_count(r300->hw.vpp.cmd, code->length + 4 * (dest & 0xff));
 371                         break;
 372                 case 4:
 373                         R300_STATECHANGE(r300, vps);
 374                         for (i = 0; i < code->length; i++)
 375                                 r300->hw.vps.cmd[1 + i + 4 * (dest & 0xff)] = (code->body.d[i]);
 376                         bump_vpu_count(r300->hw.vps.cmd, code->length + 4 * (dest & 0xff));
 377                         break;
 378                 default:
 379                         fprintf(stderr, "%s:%s don't know how to handle dest %04x\n", __FILE__, __FUNCTION__, dest);
 380                         exit(-1);
 381         }
 382 }
 383
 384 void r300SetupVertexProgram(r300ContextPtr rmesa)
 385 {
 386         GLcontext *ctx = rmesa->radeon.glCtx;
 387         struct r300_vertex_program *prog = rmesa->selected_vp;
 388         int inst_count = 0;
 389         int param_count = 0;
 390
 391         /* Reset state, in case we don't use something */
 392         ((drm_r300_cmd_header_t *) rmesa->hw.vpp.cmd)->vpu.count = 0;
 393         ((drm_r300_cmd_header_t *) rmesa->hw.vpi.cmd)->vpu.count = 0;
 394         ((drm_r300_cmd_header_t *) rmesa->hw.vps.cmd)->vpu.count = 0;
 395
 396         R300_STATECHANGE(rmesa, vap_cntl);
 397         R300_STATECHANGE(rmesa, vpp);
 398         param_count = r300VertexProgUpdateParams(ctx, prog, (float *)&rmesa->hw.vpp.cmd[R300_VPP_PARAM_0]);
 399         if (!rmesa->radeon.radeonScreen->kernel_mm && param_count > 255 * 4) {
 400                 WARN_ONCE("Too many VP params, expect rendering errors\n");
 401         }
 402         /* Prevent the overflow (vpu.count is u8) */
 403         bump_vpu_count(rmesa->hw.vpp.cmd, MIN2(255 * 4, param_count));
 404         param_count /= 4;
 405
 406         r300EmitVertexProgram(rmesa, R300_PVS_CODE_START, &(prog->code));
 407         inst_count = (prog->code.length / 4) - 1;
 408
 409         r300VapCntl(rmesa, _mesa_bitcount(prog->code.InputsRead),
 410                                  _mesa_bitcount(prog->code.OutputsWritten), prog->code.num_temporaries);
 411
 412         R300_STATECHANGE(rmesa, pvs);
 413         rmesa->hw.pvs.cmd[R300_PVS_CNTL_1] = (0 << R300_PVS_FIRST_INST_SHIFT) | (inst_count << R300_PVS_XYZW_VALID_INST_SHIFT) |
 414                                 (inst_count << R300_PVS_LAST_INST_SHIFT);
 415
 416         rmesa->hw.pvs.cmd[R300_PVS_CNTL_2] = (0 << R300_PVS_CONST_BASE_OFFSET_SHIFT) | ((param_count - 1) << R300_PVS_MAX_CONST_ADDR_SHIFT);
 417         rmesa->hw.pvs.cmd[R300_PVS_CNTL_3] = (inst_count << R300_PVS_LAST_VTX_SRC_INST_SHIFT);
 418 }