src/gallium/drivers/swr/swr_shader.cpp

   1 /****************************************************************************
   2  * Copyright (C) 2015 Intel Corporation.   All Rights Reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  ***************************************************************************/
  23
  24 // llvm redefines DEBUG
  25 #pragma push_macro("DEBUG")
  26 #undef DEBUG
  27 #include "JitManager.h"
  28 #include "llvm-c/Core.h"
  29 #include "llvm/Support/CBindingWrapping.h"
  30 #include "llvm/IR/LegacyPassManager.h"
  31 #pragma pop_macro("DEBUG")
  32
  33 #include "state.h"
  34 #include "gen_state_llvm.h"
  35 #include "builder.h"
  36 #include "functionpasses/passes.h"
  37
  38 #include "tgsi/tgsi_strings.h"
  39 #include "util/u_format.h"
  40 #include "util/u_prim.h"
  41 #include "gallivm/lp_bld_init.h"
  42 #include "gallivm/lp_bld_flow.h"
  43 #include "gallivm/lp_bld_struct.h"
  44 #include "gallivm/lp_bld_tgsi.h"
  45
  46 #include "swr_context.h"
  47 #include "gen_swr_context_llvm.h"
  48 #include "swr_resource.h"
  49 #include "swr_state.h"
  50 #include "swr_screen.h"
  51
  52 using namespace SwrJit;
  53 using namespace llvm;
  54
  55 static unsigned
  56 locate_linkage(ubyte name, ubyte index, struct tgsi_shader_info *info);
  57
  58 bool operator==(const swr_jit_fs_key &lhs, const swr_jit_fs_key &rhs)
  59 {
  60    return !memcmp(&lhs, &rhs, sizeof(lhs));
  61 }
  62
  63 bool operator==(const swr_jit_vs_key &lhs, const swr_jit_vs_key &rhs)
  64 {
  65    return !memcmp(&lhs, &rhs, sizeof(lhs));
  66 }
  67
  68 bool operator==(const swr_jit_fetch_key &lhs, const swr_jit_fetch_key &rhs)
  69 {
  70    return !memcmp(&lhs, &rhs, sizeof(lhs));
  71 }
  72
  73 bool operator==(const swr_jit_gs_key &lhs, const swr_jit_gs_key &rhs)
  74 {
  75    return !memcmp(&lhs, &rhs, sizeof(lhs));
  76 }
  77
  78 static void
  79 swr_generate_sampler_key(const struct lp_tgsi_info &info,
  80                          struct swr_context *ctx,
  81                          enum pipe_shader_type shader_type,
  82                          struct swr_jit_sampler_key &key)
  83 {
  84    key.nr_samplers = info.base.file_max[TGSI_FILE_SAMPLER] + 1;
  85
  86    for (unsigned i = 0; i < key.nr_samplers; i++) {
  87       if (info.base.file_mask[TGSI_FILE_SAMPLER] & (1 << i)) {
  88          lp_sampler_static_sampler_state(
  89             &key.sampler[i].sampler_state,
  90             ctx->samplers[shader_type][i]);
  91       }
  92    }
  93
  94    /*
  95     * XXX If TGSI_FILE_SAMPLER_VIEW exists assume all texture opcodes
  96     * are dx10-style? Can't really have mixed opcodes, at least not
  97     * if we want to skip the holes here (without rescanning tgsi).
  98     */
  99    if (info.base.file_max[TGSI_FILE_SAMPLER_VIEW] != -1) {
 100       key.nr_sampler_views =
 101          info.base.file_max[TGSI_FILE_SAMPLER_VIEW] + 1;
 102       for (unsigned i = 0; i < key.nr_sampler_views; i++) {
 103          if (info.base.file_mask[TGSI_FILE_SAMPLER_VIEW] & (1u << (i & 31))) {
 104             const struct pipe_sampler_view *view =
 105                ctx->sampler_views[shader_type][i];
 106             lp_sampler_static_texture_state(
 107                &key.sampler[i].texture_state, view);
 108             if (view) {
 109                struct swr_resource *swr_res = swr_resource(view->texture);
 110                const struct util_format_description *desc =
 111                   util_format_description(view->format);
 112                if (swr_res->has_depth && swr_res->has_stencil &&
 113                    !util_format_has_depth(desc))
 114                   key.sampler[i].texture_state.format = PIPE_FORMAT_S8_UINT;
 115             }
 116          }
 117       }
 118    } else {
 119       key.nr_sampler_views = key.nr_samplers;
 120       for (unsigned i = 0; i < key.nr_sampler_views; i++) {
 121          if (info.base.file_mask[TGSI_FILE_SAMPLER] & (1 << i)) {
 122             const struct pipe_sampler_view *view =
 123                ctx->sampler_views[shader_type][i];
 124             lp_sampler_static_texture_state(
 125                &key.sampler[i].texture_state, view);
 126             if (view) {
 127                struct swr_resource *swr_res = swr_resource(view->texture);
 128                const struct util_format_description *desc =
 129                   util_format_description(view->format);
 130                if (swr_res->has_depth && swr_res->has_stencil &&
 131                    !util_format_has_depth(desc))
 132                   key.sampler[i].texture_state.format = PIPE_FORMAT_S8_UINT;
 133             }
 134          }
 135       }
 136    }
 137 }
 138
 139 void
 140 swr_generate_fs_key(struct swr_jit_fs_key &key,
 141                     struct swr_context *ctx,
 142                     swr_fragment_shader *swr_fs)
 143 {
 144    memset(&key, 0, sizeof(key));
 145
 146    key.nr_cbufs = ctx->framebuffer.nr_cbufs;
 147    key.light_twoside = ctx->rasterizer->light_twoside;
 148    key.sprite_coord_enable = ctx->rasterizer->sprite_coord_enable;
 149
 150    struct tgsi_shader_info *pPrevShader;
 151    if (ctx->gs)
 152       pPrevShader = &ctx->gs->info.base;
 153    else
 154       pPrevShader = &ctx->vs->info.base;
 155
 156    memcpy(&key.vs_output_semantic_name,
 157           &pPrevShader->output_semantic_name,
 158           sizeof(key.vs_output_semantic_name));
 159    memcpy(&key.vs_output_semantic_idx,
 160           &pPrevShader->output_semantic_index,
 161           sizeof(key.vs_output_semantic_idx));
 162
 163    swr_generate_sampler_key(swr_fs->info, ctx, PIPE_SHADER_FRAGMENT, key);
 164
 165    key.poly_stipple_enable = ctx->rasterizer->poly_stipple_enable &&
 166       ctx->poly_stipple.prim_is_poly;
 167 }
 168
 169 void
 170 swr_generate_vs_key(struct swr_jit_vs_key &key,
 171                     struct swr_context *ctx,
 172                     swr_vertex_shader *swr_vs)
 173 {
 174    memset(&key, 0, sizeof(key));
 175
 176    key.clip_plane_mask =
 177       swr_vs->info.base.clipdist_writemask ?
 178       swr_vs->info.base.clipdist_writemask & ctx->rasterizer->clip_plane_enable :
 179       ctx->rasterizer->clip_plane_enable;
 180
 181    swr_generate_sampler_key(swr_vs->info, ctx, PIPE_SHADER_VERTEX, key);
 182 }
 183
 184 void
 185 swr_generate_fetch_key(struct swr_jit_fetch_key &key,
 186                        struct swr_vertex_element_state *velems)
 187 {
 188    memset(&key, 0, sizeof(key));
 189
 190    key.fsState = velems->fsState;
 191 }
 192
 193 void
 194 swr_generate_gs_key(struct swr_jit_gs_key &key,
 195                     struct swr_context *ctx,
 196                     swr_geometry_shader *swr_gs)
 197 {
 198    memset(&key, 0, sizeof(key));
 199
 200    struct tgsi_shader_info *pPrevShader = &ctx->vs->info.base;
 201
 202    memcpy(&key.vs_output_semantic_name,
 203           &pPrevShader->output_semantic_name,
 204           sizeof(key.vs_output_semantic_name));
 205    memcpy(&key.vs_output_semantic_idx,
 206           &pPrevShader->output_semantic_index,
 207           sizeof(key.vs_output_semantic_idx));
 208
 209    swr_generate_sampler_key(swr_gs->info, ctx, PIPE_SHADER_GEOMETRY, key);
 210 }
 211
 212 struct BuilderSWR : public Builder {
 213    BuilderSWR(JitManager *pJitMgr, const char *pName)
 214       : Builder(pJitMgr)
 215    {
 216       pJitMgr->SetupNewModule();
 217       gallivm = gallivm_create(pName, wrap(&JM()->mContext));
 218       pJitMgr->mpCurrentModule = unwrap(gallivm->module);
 219    }
 220
 221    ~BuilderSWR() {
 222       gallivm_free_ir(gallivm);
 223    }
 224
 225    void WriteVS(Value *pVal, Value *pVsContext, Value *pVtxOutput,
 226                 unsigned slot, unsigned channel);
 227
 228    struct gallivm_state *gallivm;
 229    PFN_VERTEX_FUNC CompileVS(struct swr_context *ctx, swr_jit_vs_key &key);
 230    PFN_PIXEL_KERNEL CompileFS(struct swr_context *ctx, swr_jit_fs_key &key);
 231    PFN_GS_FUNC CompileGS(struct swr_context *ctx, swr_jit_gs_key &key);
 232
 233    LLVMValueRef
 234    swr_gs_llvm_fetch_input(const struct lp_build_tgsi_gs_iface *gs_iface,
 235                            struct lp_build_tgsi_context * bld_base,
 236                            boolean is_vindex_indirect,
 237                            LLVMValueRef vertex_index,
 238                            boolean is_aindex_indirect,
 239                            LLVMValueRef attrib_index,
 240                            LLVMValueRef swizzle_index);
 241    void
 242    swr_gs_llvm_emit_vertex(const struct lp_build_tgsi_gs_iface *gs_base,
 243                            struct lp_build_tgsi_context * bld_base,
 244                            LLVMValueRef (*outputs)[4],
 245                            LLVMValueRef emitted_vertices_vec);
 246
 247    void
 248    swr_gs_llvm_end_primitive(const struct lp_build_tgsi_gs_iface *gs_base,
 249                              struct lp_build_tgsi_context * bld_base,
 250                              LLVMValueRef verts_per_prim_vec,
 251                              LLVMValueRef emitted_prims_vec);
 252
 253    void
 254    swr_gs_llvm_epilogue(const struct lp_build_tgsi_gs_iface *gs_base,
 255                         struct lp_build_tgsi_context * bld_base,
 256                         LLVMValueRef total_emitted_vertices_vec,
 257                         LLVMValueRef emitted_prims_vec);
 258
 259 };
 260
 261 struct swr_gs_llvm_iface {
 262    struct lp_build_tgsi_gs_iface base;
 263    struct tgsi_shader_info *info;
 264
 265    BuilderSWR *pBuilder;
 266
 267    Value *pGsCtx;
 268    SWR_GS_STATE *pGsState;
 269    uint32_t num_outputs;
 270    uint32_t num_verts_per_prim;
 271
 272    Value *pVtxAttribMap;
 273 };
 274
 275 // trampoline functions so we can use the builder llvm construction methods
 276 static LLVMValueRef
 277 swr_gs_llvm_fetch_input(const struct lp_build_tgsi_gs_iface *gs_iface,
 278                            struct lp_build_tgsi_context * bld_base,
 279                            boolean is_vindex_indirect,
 280                            LLVMValueRef vertex_index,
 281                            boolean is_aindex_indirect,
 282                            LLVMValueRef attrib_index,
 283                            LLVMValueRef swizzle_index)
 284 {
 285     swr_gs_llvm_iface *iface = (swr_gs_llvm_iface*)gs_iface;
 286
 287     return iface->pBuilder->swr_gs_llvm_fetch_input(gs_iface, bld_base,
 288                                                    is_vindex_indirect,
 289                                                    vertex_index,
 290                                                    is_aindex_indirect,
 291                                                    attrib_index,
 292                                                    swizzle_index);
 293 }
 294
 295 static void
 296 swr_gs_llvm_emit_vertex(const struct lp_build_tgsi_gs_iface *gs_base,
 297                            struct lp_build_tgsi_context * bld_base,
 298                            LLVMValueRef (*outputs)[4],
 299                            LLVMValueRef emitted_vertices_vec)
 300 {
 301     swr_gs_llvm_iface *iface = (swr_gs_llvm_iface*)gs_base;
 302
 303     iface->pBuilder->swr_gs_llvm_emit_vertex(gs_base, bld_base,
 304                                             outputs,
 305                                             emitted_vertices_vec);
 306 }
 307
 308 static void
 309 swr_gs_llvm_end_primitive(const struct lp_build_tgsi_gs_iface *gs_base,
 310                              struct lp_build_tgsi_context * bld_base,
 311                              LLVMValueRef verts_per_prim_vec,
 312                              LLVMValueRef emitted_prims_vec)
 313 {
 314     swr_gs_llvm_iface *iface = (swr_gs_llvm_iface*)gs_base;
 315
 316     iface->pBuilder->swr_gs_llvm_end_primitive(gs_base, bld_base,
 317                                               verts_per_prim_vec,
 318                                               emitted_prims_vec);
 319 }
 320
 321 static void
 322 swr_gs_llvm_epilogue(const struct lp_build_tgsi_gs_iface *gs_base,
 323                         struct lp_build_tgsi_context * bld_base,
 324                         LLVMValueRef total_emitted_vertices_vec,
 325                         LLVMValueRef emitted_prims_vec)
 326 {
 327     swr_gs_llvm_iface *iface = (swr_gs_llvm_iface*)gs_base;
 328
 329     iface->pBuilder->swr_gs_llvm_epilogue(gs_base, bld_base,
 330                                          total_emitted_vertices_vec,
 331                                          emitted_prims_vec);
 332 }
 333
 334 LLVMValueRef
 335 BuilderSWR::swr_gs_llvm_fetch_input(const struct lp_build_tgsi_gs_iface *gs_iface,
 336                            struct lp_build_tgsi_context * bld_base,
 337                            boolean is_vindex_indirect,
 338                            LLVMValueRef vertex_index,
 339                            boolean is_aindex_indirect,
 340                            LLVMValueRef attrib_index,
 341                            LLVMValueRef swizzle_index)
 342 {
 343     swr_gs_llvm_iface *iface = (swr_gs_llvm_iface*)gs_iface;
 344     Value *vert_index = unwrap(vertex_index);
 345     Value *attr_index = unwrap(attrib_index);
 346
 347     IRB()->SetInsertPoint(unwrap(LLVMGetInsertBlock(gallivm->builder)));
 348
 349     if (is_vindex_indirect || is_aindex_indirect) {
 350        int i;
 351        Value *res = unwrap(bld_base->base.zero);
 352        struct lp_type type = bld_base->base.type;
 353
 354        for (i = 0; i < type.length; i++) {
 355           Value *vert_chan_index = vert_index;
 356           Value *attr_chan_index = attr_index;
 357
 358           if (is_vindex_indirect) {
 359              vert_chan_index = VEXTRACT(vert_index, C(i));
 360           }
 361           if (is_aindex_indirect) {
 362              attr_chan_index = VEXTRACT(attr_index, C(i));
 363           }
 364
 365           Value *attrib =
 366              LOAD(GEP(iface->pVtxAttribMap, {C(0), attr_chan_index}));
 367
 368           Value *pVertex = LOAD(iface->pGsCtx, {0, SWR_GS_CONTEXT_pVerts});
 369           Value *pInputVertStride = LOAD(iface->pGsCtx, {0, SWR_GS_CONTEXT_inputVertStride});
 370
 371           Value *pVector = ADD(MUL(vert_chan_index, pInputVertStride), attrib);
 372           Value *pInput = LOAD(GEP(pVertex, {pVector, unwrap(swizzle_index)}));
 373
 374           Value *value = VEXTRACT(pInput, C(i));
 375           res = VINSERT(res, value, C(i));
 376        }
 377
 378        return wrap(res);
 379     } else {
 380        Value *attrib = LOAD(GEP(iface->pVtxAttribMap, {C(0), attr_index}));
 381
 382        Value *pVertex = LOAD(iface->pGsCtx, {0, SWR_GS_CONTEXT_pVerts});
 383        Value *pInputVertStride = LOAD(iface->pGsCtx, {0, SWR_GS_CONTEXT_inputVertStride});
 384
 385        Value *pVector = ADD(MUL(vert_index, pInputVertStride), attrib);
 386
 387        Value *pInput = LOAD(GEP(pVertex, {pVector, unwrap(swizzle_index)}));
 388
 389        return wrap(pInput);
 390     }
 391 }
 392
 393 // GS output stream layout
 394 #define VERTEX_COUNT_SIZE 32
 395 #define CONTROL_HEADER_SIZE (8*32)
 396
 397 void
 398 BuilderSWR::swr_gs_llvm_emit_vertex(const struct lp_build_tgsi_gs_iface *gs_base,
 399                            struct lp_build_tgsi_context * bld_base,
 400                            LLVMValueRef (*outputs)[4],
 401                            LLVMValueRef emitted_vertices_vec)
 402 {
 403     swr_gs_llvm_iface *iface = (swr_gs_llvm_iface*)gs_base;
 404
 405     IRB()->SetInsertPoint(unwrap(LLVMGetInsertBlock(gallivm->builder)));
 406
 407     const uint32_t headerSize = VERTEX_COUNT_SIZE + CONTROL_HEADER_SIZE;
 408     const uint32_t attribSize = 4 * sizeof(float);
 409     const uint32_t vertSize = attribSize * SWR_VTX_NUM_SLOTS;
 410     Value *pVertexOffset = MUL(unwrap(emitted_vertices_vec), VIMMED1(vertSize));
 411
 412     Value *vMask = LOAD(iface->pGsCtx, {0, SWR_GS_CONTEXT_mask});
 413     Value *vMask1 = TRUNC(vMask, VectorType::get(mInt1Ty, mVWidth));
 414
 415     Value *pStack = STACKSAVE();
 416     Value *pTmpPtr = ALLOCA(mFP32Ty, C(4)); // used for dummy write for lane masking
 417
 418     for (uint32_t attrib = 0; attrib < iface->num_outputs; ++attrib) {
 419        uint32_t attribSlot = attrib;
 420        uint32_t sgvChannel = 0;
 421        if (iface->info->output_semantic_name[attrib] == TGSI_SEMANTIC_PSIZE) {
 422           attribSlot = VERTEX_SGV_SLOT;
 423           sgvChannel = VERTEX_SGV_POINT_SIZE_COMP;
 424        } else if (iface->info->output_semantic_name[attrib] == TGSI_SEMANTIC_LAYER) {
 425           attribSlot = VERTEX_SGV_SLOT;
 426           sgvChannel = VERTEX_SGV_RTAI_COMP;
 427        } else if (iface->info->output_semantic_name[attrib] == TGSI_SEMANTIC_POSITION) {
 428           attribSlot = VERTEX_POSITION_SLOT;
 429        } else {
 430           attribSlot = VERTEX_ATTRIB_START_SLOT + attrib;
 431           if (iface->info->writes_position) {
 432              attribSlot--;
 433           }
 434        }
 435
 436        Value *pOutputOffset = ADD(pVertexOffset, VIMMED1(headerSize + attribSize * attribSlot)); // + sgvChannel ?
 437
 438        for (uint32_t lane = 0; lane < mVWidth; ++lane) {
 439           Value *pLaneOffset = VEXTRACT(pOutputOffset, C(lane));
 440           Value *pStream = LOAD(iface->pGsCtx, {0, SWR_GS_CONTEXT_pStreams, lane});
 441           Value *pStreamOffset = GEP(pStream, pLaneOffset);
 442           pStreamOffset = BITCAST(pStreamOffset, mFP32PtrTy);
 443
 444           Value *pLaneMask = VEXTRACT(vMask1, C(lane));
 445           pStreamOffset = SELECT(pLaneMask, pStreamOffset, pTmpPtr);
 446
 447           for (uint32_t channel = 0; channel < 4; ++channel) {
 448              Value *vData;
 449
 450              if (attribSlot == VERTEX_SGV_SLOT)
 451                 vData = LOAD(unwrap(outputs[attrib][0]));
 452              else
 453                 vData = LOAD(unwrap(outputs[attrib][channel]));
 454
 455              if (attribSlot != VERTEX_SGV_SLOT ||
 456                  sgvChannel == channel) {
 457                 vData = VEXTRACT(vData, C(lane));
 458                 STORE(vData, pStreamOffset);
 459              }
 460              pStreamOffset = GEP(pStreamOffset, C(1));
 461           }
 462        }
 463     }
 464
 465     STACKRESTORE(pStack);
 466 }
 467
 468 void
 469 BuilderSWR::swr_gs_llvm_end_primitive(const struct lp_build_tgsi_gs_iface *gs_base,
 470                              struct lp_build_tgsi_context * bld_base,
 471                              LLVMValueRef verts_per_prim_vec,
 472                              LLVMValueRef emitted_prims_vec)
 473 {
 474     swr_gs_llvm_iface *iface = (swr_gs_llvm_iface*)gs_base;
 475
 476     IRB()->SetInsertPoint(unwrap(LLVMGetInsertBlock(gallivm->builder)));
 477
 478     Value *vMask = LOAD(iface->pGsCtx, { 0, SWR_GS_CONTEXT_mask });
 479     Value *vMask1 = TRUNC(vMask, VectorType::get(mInt1Ty, 8));
 480
 481     uint32_t vertsPerPrim = iface->num_verts_per_prim;
 482
 483     Value *vCount =
 484        ADD(MUL(unwrap(emitted_prims_vec), VIMMED1(vertsPerPrim)),
 485            unwrap(verts_per_prim_vec));
 486
 487     struct lp_build_tgsi_soa_context *bld = lp_soa_context(bld_base);
 488     vCount = LOAD(unwrap(bld->total_emitted_vertices_vec_ptr));
 489
 490     struct lp_exec_mask *exec_mask = &bld->exec_mask;
 491     Value *mask = unwrap(lp_build_mask_value(bld->mask));
 492     if (exec_mask->has_mask)
 493        mask = AND(mask, unwrap(exec_mask->exec_mask));
 494
 495     Value *cmpMask = VMASK(ICMP_NE(unwrap(verts_per_prim_vec), VIMMED1(0)));
 496     mask = AND(mask, cmpMask);
 497     vMask1 = TRUNC(mask, VectorType::get(mInt1Ty, 8));
 498
 499     vCount = SUB(vCount, VIMMED1(1));
 500     Value *vOffset = ADD(UDIV(vCount, VIMMED1(8)), VIMMED1(VERTEX_COUNT_SIZE));
 501     Value *vValue = SHL(VIMMED1(1), UREM(vCount, VIMMED1(8)));
 502
 503     vValue = TRUNC(vValue, VectorType::get(mInt8Ty, 8));
 504
 505     Value *pStack = STACKSAVE();
 506     Value *pTmpPtr = ALLOCA(mInt8Ty, C(4)); // used for dummy read/write for lane masking
 507
 508     for (uint32_t lane = 0; lane < mVWidth; ++lane) {
 509        Value *vLaneOffset = VEXTRACT(vOffset, C(lane));
 510        Value *pStream = LOAD(iface->pGsCtx, {0, SWR_GS_CONTEXT_pStreams, lane});
 511        Value *pStreamOffset = GEP(pStream, vLaneOffset);
 512
 513        Value *pLaneMask = VEXTRACT(vMask1, C(lane));
 514        pStreamOffset = SELECT(pLaneMask, pStreamOffset, pTmpPtr);
 515
 516        Value *vVal = LOAD(pStreamOffset);
 517        vVal = OR(vVal, VEXTRACT(vValue, C(lane)));
 518        STORE(vVal, pStreamOffset);
 519     }
 520
 521     STACKRESTORE(pStack);
 522 }
 523
 524 void
 525 BuilderSWR::swr_gs_llvm_epilogue(const struct lp_build_tgsi_gs_iface *gs_base,
 526                         struct lp_build_tgsi_context * bld_base,
 527                         LLVMValueRef total_emitted_vertices_vec,
 528                         LLVMValueRef emitted_prims_vec)
 529 {
 530    swr_gs_llvm_iface *iface = (swr_gs_llvm_iface*)gs_base;
 531
 532    IRB()->SetInsertPoint(unwrap(LLVMGetInsertBlock(gallivm->builder)));
 533
 534    // Store emit count to each output stream in the first DWORD
 535    for (uint32_t lane = 0; lane < mVWidth; ++lane)
 536    {
 537       Value* pStream = LOAD(iface->pGsCtx, {0, SWR_GS_CONTEXT_pStreams, lane});
 538       pStream = BITCAST(pStream, mInt32PtrTy);
 539       Value* pLaneCount = VEXTRACT(unwrap(total_emitted_vertices_vec), C(lane));
 540       STORE(pLaneCount, pStream);
 541    }
 542 }
 543
 544 PFN_GS_FUNC
 545 BuilderSWR::CompileGS(struct swr_context *ctx, swr_jit_gs_key &key)
 546 {
 547    SWR_GS_STATE *pGS = &ctx->gs->gsState;
 548    struct tgsi_shader_info *info = &ctx->gs->info.base;
 549
 550    memset(pGS, 0, sizeof(*pGS));
 551
 552    pGS->gsEnable = true;
 553
 554    pGS->numInputAttribs = info->num_inputs;
 555    pGS->outputTopology =
 556       swr_convert_prim_topology(info->properties[TGSI_PROPERTY_GS_OUTPUT_PRIM]);
 557    pGS->maxNumVerts = info->properties[TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES];
 558    pGS->instanceCount = info->properties[TGSI_PROPERTY_GS_INVOCATIONS];
 559
 560    // XXX: single stream for now...
 561    pGS->isSingleStream = true;
 562    pGS->singleStreamID = 0;
 563
 564    pGS->vertexAttribOffset = VERTEX_ATTRIB_START_SLOT; // TODO: optimize
 565    pGS->srcVertexAttribOffset = VERTEX_ATTRIB_START_SLOT; // TODO: optimize
 566    pGS->inputVertStride = pGS->numInputAttribs + pGS->vertexAttribOffset;
 567    pGS->outputVertexSize = SWR_VTX_NUM_SLOTS;
 568    pGS->controlDataSize = 8; // GS ouputs max of 8 32B units
 569    pGS->controlDataOffset = VERTEX_COUNT_SIZE;
 570    pGS->outputVertexOffset = pGS->controlDataOffset + CONTROL_HEADER_SIZE;
 571
 572    pGS->allocationSize =
 573       VERTEX_COUNT_SIZE + // vertex count
 574       CONTROL_HEADER_SIZE + // control header
 575       (SWR_VTX_NUM_SLOTS * 16) * // sizeof vertex
 576       pGS->maxNumVerts; // num verts
 577
 578    struct swr_geometry_shader *gs = ctx->gs;
 579
 580    LLVMValueRef inputs[PIPE_MAX_SHADER_INPUTS][TGSI_NUM_CHANNELS];
 581    LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][TGSI_NUM_CHANNELS];
 582
 583    memset(outputs, 0, sizeof(outputs));
 584
 585    AttrBuilder attrBuilder;
 586    attrBuilder.addStackAlignmentAttr(JM()->mVWidth * sizeof(float));
 587
 588    std::vector<Type *> gsArgs{PointerType::get(Gen_swr_draw_context(JM()), 0),
 589                               PointerType::get(mInt8Ty, 0),
 590                               PointerType::get(Gen_SWR_GS_CONTEXT(JM()), 0)};
 591    FunctionType *vsFuncType =
 592       FunctionType::get(Type::getVoidTy(JM()->mContext), gsArgs, false);
 593
 594    // create new vertex shader function
 595    auto pFunction = Function::Create(vsFuncType,
 596                                      GlobalValue::ExternalLinkage,
 597                                      "GS",
 598                                      JM()->mpCurrentModule);
 599 #if HAVE_LLVM < 0x0500
 600    AttributeSet attrSet = AttributeSet::get(
 601       JM()->mContext, AttributeSet::FunctionIndex, attrBuilder);
 602    pFunction->addAttributes(AttributeSet::FunctionIndex, attrSet);
 603 #else
 604    pFunction->addAttributes(AttributeList::FunctionIndex, attrBuilder);
 605 #endif
 606
 607    BasicBlock *block = BasicBlock::Create(JM()->mContext, "entry", pFunction);
 608    IRB()->SetInsertPoint(block);
 609    LLVMPositionBuilderAtEnd(gallivm->builder, wrap(block));
 610
 611    auto argitr = pFunction->arg_begin();
 612    Value *hPrivateData = &*argitr++;
 613    hPrivateData->setName("hPrivateData");
 614    Value *pWorkerData = &*argitr++;
 615    pWorkerData->setName("pWorkerData");
 616    Value *pGsCtx = &*argitr++;
 617    pGsCtx->setName("gsCtx");
 618
 619    Value *consts_ptr =
 620       GEP(hPrivateData, {C(0), C(swr_draw_context_constantGS)});
 621    consts_ptr->setName("gs_constants");
 622    Value *const_sizes_ptr =
 623       GEP(hPrivateData, {0, swr_draw_context_num_constantsGS});
 624    const_sizes_ptr->setName("num_gs_constants");
 625
 626    struct lp_build_sampler_soa *sampler =
 627       swr_sampler_soa_create(key.sampler, PIPE_SHADER_GEOMETRY);
 628
 629    struct lp_bld_tgsi_system_values system_values;
 630    memset(&system_values, 0, sizeof(system_values));
 631    system_values.prim_id = wrap(LOAD(pGsCtx, {0, SWR_GS_CONTEXT_PrimitiveID}));
 632    system_values.instance_id = wrap(LOAD(pGsCtx, {0, SWR_GS_CONTEXT_InstanceID}));
 633
 634    std::vector<Constant*> mapConstants;
 635    Value *vtxAttribMap = ALLOCA(ArrayType::get(mInt32Ty, PIPE_MAX_SHADER_INPUTS));
 636    for (unsigned slot = 0; slot < info->num_inputs; slot++) {
 637       ubyte semantic_name = info->input_semantic_name[slot];
 638       ubyte semantic_idx = info->input_semantic_index[slot];
 639
 640       unsigned vs_slot = locate_linkage(semantic_name, semantic_idx, &ctx->vs->info.base);
 641
 642       vs_slot += VERTEX_ATTRIB_START_SLOT;
 643
 644       if (ctx->vs->info.base.output_semantic_name[0] == TGSI_SEMANTIC_POSITION)
 645          vs_slot--;
 646
 647       if (semantic_name == TGSI_SEMANTIC_POSITION)
 648          vs_slot = VERTEX_POSITION_SLOT;
 649
 650       STORE(C(vs_slot), vtxAttribMap, {0, slot});
 651       mapConstants.push_back(C(vs_slot));
 652    }
 653
 654    struct lp_build_mask_context mask;
 655    Value *mask_val = LOAD(pGsCtx, {0, SWR_GS_CONTEXT_mask}, "gsMask");
 656    lp_build_mask_begin(&mask, gallivm,
 657                        lp_type_float_vec(32, 32 * 8), wrap(mask_val));
 658
 659    // zero out cut buffer so we can load/modify/store bits
 660    for (uint32_t lane = 0; lane < mVWidth; ++lane)
 661    {
 662       Value* pStream = LOAD(pGsCtx, {0, SWR_GS_CONTEXT_pStreams, lane});
 663       MEMSET(pStream, C((char)0), VERTEX_COUNT_SIZE + CONTROL_HEADER_SIZE, sizeof(float) * KNOB_SIMD_WIDTH);
 664    }
 665
 666    struct swr_gs_llvm_iface gs_iface;
 667    gs_iface.base.fetch_input = ::swr_gs_llvm_fetch_input;
 668    gs_iface.base.emit_vertex = ::swr_gs_llvm_emit_vertex;
 669    gs_iface.base.end_primitive = ::swr_gs_llvm_end_primitive;
 670    gs_iface.base.gs_epilogue = ::swr_gs_llvm_epilogue;
 671    gs_iface.pBuilder = this;
 672    gs_iface.pGsCtx = pGsCtx;
 673    gs_iface.pGsState = pGS;
 674    gs_iface.num_outputs = gs->info.base.num_outputs;
 675    gs_iface.num_verts_per_prim =
 676       u_vertices_per_prim((pipe_prim_type)info->properties[TGSI_PROPERTY_GS_OUTPUT_PRIM]);
 677    gs_iface.info = info;
 678    gs_iface.pVtxAttribMap = vtxAttribMap;
 679
 680    lp_build_tgsi_soa(gallivm,
 681                      gs->pipe.tokens,
 682                      lp_type_float_vec(32, 32 * 8),
 683                      &mask,
 684                      wrap(consts_ptr),
 685                      wrap(const_sizes_ptr),
 686                      &system_values,
 687                      inputs,
 688                      outputs,
 689                      wrap(hPrivateData), // (sampler context)
 690                      NULL, // thread data
 691                      sampler,
 692                      &gs->info.base,
 693                      &gs_iface.base);
 694
 695    lp_build_mask_end(&mask);
 696
 697    sampler->destroy(sampler);
 698
 699    IRB()->SetInsertPoint(unwrap(LLVMGetInsertBlock(gallivm->builder)));
 700
 701    RET_VOID();
 702
 703    gallivm_verify_function(gallivm, wrap(pFunction));
 704    gallivm_compile_module(gallivm);
 705
 706    PFN_GS_FUNC pFunc =
 707       (PFN_GS_FUNC)gallivm_jit_function(gallivm, wrap(pFunction));
 708
 709    debug_printf("geom shader  %p\n", pFunc);
 710    assert(pFunc && "Error: GeomShader = NULL");
 711
 712    JM()->mIsModuleFinalized = true;
 713
 714    return pFunc;
 715 }
 716
 717 PFN_GS_FUNC
 718 swr_compile_gs(struct swr_context *ctx, swr_jit_gs_key &key)
 719 {
 720    BuilderSWR builder(
 721       reinterpret_cast<JitManager *>(swr_screen(ctx->pipe.screen)->hJitMgr),
 722       "GS");
 723    PFN_GS_FUNC func = builder.CompileGS(ctx, key);
 724
 725    ctx->gs->map.insert(std::make_pair(key, make_unique<VariantGS>(builder.gallivm, func)));
 726    return func;
 727 }
 728
 729 void
 730 BuilderSWR::WriteVS(Value *pVal, Value *pVsContext, Value *pVtxOutput, unsigned slot, unsigned channel)
 731 {
 732 #if USE_SIMD16_FRONTEND && !USE_SIMD16_VS
 733    // interleave the simdvertex components into the dest simd16vertex
 734    //   slot16offset = slot8offset * 2
 735    //   comp16offset = comp8offset * 2 + alternateOffset
 736
 737    Value *offset = LOAD(pVsContext, { 0, SWR_VS_CONTEXT_AlternateOffset });
 738    Value *pOut = GEP(pVtxOutput, { C(0), C(0), C(slot * 2), offset } );
 739    STORE(pVal, pOut, {channel * 2});
 740 #else
 741    Value *pOut = GEP(pVtxOutput, {0, 0, slot});
 742    STORE(pVal, pOut, {0, channel});
 743 #endif
 744 }
 745
 746 PFN_VERTEX_FUNC
 747 BuilderSWR::CompileVS(struct swr_context *ctx, swr_jit_vs_key &key)
 748 {
 749    struct swr_vertex_shader *swr_vs = ctx->vs;
 750
 751    LLVMValueRef inputs[PIPE_MAX_SHADER_INPUTS][TGSI_NUM_CHANNELS];
 752    LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][TGSI_NUM_CHANNELS];
 753
 754    memset(outputs, 0, sizeof(outputs));
 755
 756    AttrBuilder attrBuilder;
 757    attrBuilder.addStackAlignmentAttr(JM()->mVWidth * sizeof(float));
 758
 759    std::vector<Type *> vsArgs{PointerType::get(Gen_swr_draw_context(JM()), 0),
 760                               PointerType::get(mInt8Ty, 0),
 761                               PointerType::get(Gen_SWR_VS_CONTEXT(JM()), 0)};
 762    FunctionType *vsFuncType =
 763       FunctionType::get(Type::getVoidTy(JM()->mContext), vsArgs, false);
 764
 765    // create new vertex shader function
 766    auto pFunction = Function::Create(vsFuncType,
 767                                      GlobalValue::ExternalLinkage,
 768                                      "VS",
 769                                      JM()->mpCurrentModule);
 770 #if HAVE_LLVM < 0x0500
 771    AttributeSet attrSet = AttributeSet::get(
 772       JM()->mContext, AttributeSet::FunctionIndex, attrBuilder);
 773    pFunction->addAttributes(AttributeSet::FunctionIndex, attrSet);
 774 #else
 775    pFunction->addAttributes(AttributeList::FunctionIndex, attrBuilder);
 776 #endif
 777
 778    BasicBlock *block = BasicBlock::Create(JM()->mContext, "entry", pFunction);
 779    IRB()->SetInsertPoint(block);
 780    LLVMPositionBuilderAtEnd(gallivm->builder, wrap(block));
 781
 782    auto argitr = pFunction->arg_begin();
 783    Value *hPrivateData = &*argitr++;
 784    hPrivateData->setName("hPrivateData");
 785    Value *pWorkerData = &*argitr++;
 786    pWorkerData->setName("pWorkerData");
 787    Value *pVsCtx = &*argitr++;
 788    pVsCtx->setName("vsCtx");
 789
 790    Value *consts_ptr = GEP(hPrivateData, {C(0), C(swr_draw_context_constantVS)});
 791
 792    consts_ptr->setName("vs_constants");
 793    Value *const_sizes_ptr =
 794       GEP(hPrivateData, {0, swr_draw_context_num_constantsVS});
 795    const_sizes_ptr->setName("num_vs_constants");
 796
 797    Value *vtxInput = LOAD(pVsCtx, {0, SWR_VS_CONTEXT_pVin});
 798 #if USE_SIMD16_VS
 799    vtxInput = BITCAST(vtxInput, PointerType::get(Gen_simd16vertex(JM()), 0));
 800 #endif
 801
 802    for (uint32_t attrib = 0; attrib < PIPE_MAX_SHADER_INPUTS; attrib++) {
 803       const unsigned mask = swr_vs->info.base.input_usage_mask[attrib];
 804       for (uint32_t channel = 0; channel < TGSI_NUM_CHANNELS; channel++) {
 805          if (mask & (1 << channel)) {
 806             inputs[attrib][channel] =
 807                wrap(LOAD(vtxInput, {0, 0, attrib, channel}));
 808          }
 809       }
 810    }
 811
 812    struct lp_build_sampler_soa *sampler =
 813       swr_sampler_soa_create(key.sampler, PIPE_SHADER_VERTEX);
 814
 815    struct lp_bld_tgsi_system_values system_values;
 816    memset(&system_values, 0, sizeof(system_values));
 817    system_values.instance_id = wrap(LOAD(pVsCtx, {0, SWR_VS_CONTEXT_InstanceID}));
 818
 819 #if USE_SIMD16_VS
 820    system_values.vertex_id = wrap(LOAD(pVsCtx, {0, SWR_VS_CONTEXT_VertexID16}));
 821 #else
 822    system_values.vertex_id = wrap(LOAD(pVsCtx, {0, SWR_VS_CONTEXT_VertexID}));
 823 #endif
 824
 825 #if USE_SIMD16_VS
 826    uint32_t vectorWidth = mVWidth16;
 827 #else
 828    uint32_t vectorWidth = mVWidth;
 829 #endif
 830
 831    lp_build_tgsi_soa(gallivm,
 832                      swr_vs->pipe.tokens,
 833                      lp_type_float_vec(32, 32 * vectorWidth),
 834                      NULL, // mask
 835                      wrap(consts_ptr),
 836                      wrap(const_sizes_ptr),
 837                      &system_values,
 838                      inputs,
 839                      outputs,
 840                      wrap(hPrivateData), // (sampler context)
 841                      NULL, // thread data
 842                      sampler, // sampler
 843                      &swr_vs->info.base,
 844                      NULL); // geometry shader face
 845
 846    sampler->destroy(sampler);
 847
 848    IRB()->SetInsertPoint(unwrap(LLVMGetInsertBlock(gallivm->builder)));
 849
 850    Value *vtxOutput = LOAD(pVsCtx, {0, SWR_VS_CONTEXT_pVout});
 851 #if USE_SIMD16_VS
 852    vtxOutput = BITCAST(vtxOutput, PointerType::get(Gen_simd16vertex(JM()), 0));
 853 #endif
 854
 855    for (uint32_t channel = 0; channel < TGSI_NUM_CHANNELS; channel++) {
 856       for (uint32_t attrib = 0; attrib < PIPE_MAX_SHADER_OUTPUTS; attrib++) {
 857          if (!outputs[attrib][channel])
 858             continue;
 859
 860          Value *val;
 861          uint32_t outSlot;
 862
 863          if (swr_vs->info.base.output_semantic_name[attrib] == TGSI_SEMANTIC_PSIZE) {
 864             if (channel != VERTEX_SGV_POINT_SIZE_COMP)
 865                continue;
 866             val = LOAD(unwrap(outputs[attrib][0]));
 867             outSlot = VERTEX_SGV_SLOT;
 868          } else if (swr_vs->info.base.output_semantic_name[attrib] == TGSI_SEMANTIC_POSITION) {
 869             val = LOAD(unwrap(outputs[attrib][channel]));
 870             outSlot = VERTEX_POSITION_SLOT;
 871          } else {
 872             val = LOAD(unwrap(outputs[attrib][channel]));
 873             outSlot = VERTEX_ATTRIB_START_SLOT + attrib;
 874             if (swr_vs->info.base.output_semantic_name[0] == TGSI_SEMANTIC_POSITION)
 875                outSlot--;
 876          }
 877
 878          WriteVS(val, pVsCtx, vtxOutput, outSlot, channel);
 879       }
 880    }
 881
 882    if (ctx->rasterizer->clip_plane_enable ||
 883        swr_vs->info.base.culldist_writemask) {
 884       unsigned clip_mask = ctx->rasterizer->clip_plane_enable;
 885
 886       unsigned cv = 0;
 887       if (swr_vs->info.base.writes_clipvertex) {
 888          cv = locate_linkage(TGSI_SEMANTIC_CLIPVERTEX, 0,
 889                              &swr_vs->info.base);
 890       } else {
 891          for (int i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
 892             if (swr_vs->info.base.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
 893                 swr_vs->info.base.output_semantic_index[i] == 0) {
 894                cv = i;
 895                break;
 896             }
 897          }
 898       }
 899       LLVMValueRef cx = LLVMBuildLoad(gallivm->builder, outputs[cv][0], "");
 900       LLVMValueRef cy = LLVMBuildLoad(gallivm->builder, outputs[cv][1], "");
 901       LLVMValueRef cz = LLVMBuildLoad(gallivm->builder, outputs[cv][2], "");
 902       LLVMValueRef cw = LLVMBuildLoad(gallivm->builder, outputs[cv][3], "");
 903
 904       for (unsigned val = 0; val < PIPE_MAX_CLIP_PLANES; val++) {
 905          // clip distance overrides user clip planes
 906          if ((swr_vs->info.base.clipdist_writemask & clip_mask & (1 << val)) ||
 907              ((swr_vs->info.base.culldist_writemask << swr_vs->info.base.num_written_clipdistance) & (1 << val))) {
 908             unsigned cv = locate_linkage(TGSI_SEMANTIC_CLIPDIST, val < 4 ? 0 : 1,
 909                                          &swr_vs->info.base);
 910             if (val < 4) {
 911                LLVMValueRef dist = LLVMBuildLoad(gallivm->builder, outputs[cv][val], "");
 912                WriteVS(unwrap(dist), pVsCtx, vtxOutput, VERTEX_CLIPCULL_DIST_LO_SLOT, val);
 913             } else {
 914                LLVMValueRef dist = LLVMBuildLoad(gallivm->builder, outputs[cv][val - 4], "");
 915                WriteVS(unwrap(dist), pVsCtx, vtxOutput, VERTEX_CLIPCULL_DIST_HI_SLOT, val - 4);
 916             }
 917             continue;
 918          }
 919
 920          if (!(clip_mask & (1 << val)))
 921             continue;
 922
 923          Value *px = LOAD(GEP(hPrivateData, {0, swr_draw_context_userClipPlanes, val, 0}));
 924          Value *py = LOAD(GEP(hPrivateData, {0, swr_draw_context_userClipPlanes, val, 1}));
 925          Value *pz = LOAD(GEP(hPrivateData, {0, swr_draw_context_userClipPlanes, val, 2}));
 926          Value *pw = LOAD(GEP(hPrivateData, {0, swr_draw_context_userClipPlanes, val, 3}));
 927 #if USE_SIMD16_VS
 928          Value *bpx = VBROADCAST_16(px);
 929          Value *bpy = VBROADCAST_16(py);
 930          Value *bpz = VBROADCAST_16(pz);
 931          Value *bpw = VBROADCAST_16(pw);
 932 #else
 933          Value *bpx = VBROADCAST(px);
 934          Value *bpy = VBROADCAST(py);
 935          Value *bpz = VBROADCAST(pz);
 936          Value *bpw = VBROADCAST(pw);
 937 #endif
 938          Value *dist = FADD(FMUL(unwrap(cx), bpx),
 939                             FADD(FMUL(unwrap(cy), bpy),
 940                                  FADD(FMUL(unwrap(cz), bpz),
 941                                       FMUL(unwrap(cw), bpw))));
 942
 943          if (val < 4)
 944             WriteVS(dist, pVsCtx, vtxOutput, VERTEX_CLIPCULL_DIST_LO_SLOT, val);
 945          else
 946             WriteVS(dist, pVsCtx, vtxOutput, VERTEX_CLIPCULL_DIST_HI_SLOT, val - 4);
 947       }
 948    }
 949
 950    RET_VOID();
 951
 952    gallivm_verify_function(gallivm, wrap(pFunction));
 953    gallivm_compile_module(gallivm);
 954
 955    //   lp_debug_dump_value(func);
 956
 957    PFN_VERTEX_FUNC pFunc =
 958       (PFN_VERTEX_FUNC)gallivm_jit_function(gallivm, wrap(pFunction));
 959
 960    debug_printf("vert shader  %p\n", pFunc);
 961    assert(pFunc && "Error: VertShader = NULL");
 962
 963    JM()->mIsModuleFinalized = true;
 964
 965    return pFunc;
 966 }
 967
 968 PFN_VERTEX_FUNC
 969 swr_compile_vs(struct swr_context *ctx, swr_jit_vs_key &key)
 970 {
 971    if (!ctx->vs->pipe.tokens)
 972       return NULL;
 973
 974    BuilderSWR builder(
 975       reinterpret_cast<JitManager *>(swr_screen(ctx->pipe.screen)->hJitMgr),
 976       "VS");
 977    PFN_VERTEX_FUNC func = builder.CompileVS(ctx, key);
 978
 979    ctx->vs->map.insert(std::make_pair(key, make_unique<VariantVS>(builder.gallivm, func)));
 980    return func;
 981 }
 982
 983 unsigned
 984 swr_so_adjust_attrib(unsigned in_attrib,
 985                      swr_vertex_shader *swr_vs)
 986 {
 987    ubyte semantic_name;
 988    unsigned attrib;
 989
 990    attrib = in_attrib + VERTEX_ATTRIB_START_SLOT;
 991
 992    if (swr_vs) {
 993       semantic_name = swr_vs->info.base.output_semantic_name[in_attrib];
 994       if (semantic_name == TGSI_SEMANTIC_POSITION) {
 995          attrib = VERTEX_POSITION_SLOT;
 996       } else if (semantic_name == TGSI_SEMANTIC_PSIZE) {
 997          attrib = VERTEX_SGV_SLOT;
 998       } else if (semantic_name == TGSI_SEMANTIC_LAYER) {
 999          attrib = VERTEX_SGV_SLOT;
1000       } else {
1001          if (swr_vs->info.base.writes_position) {
1002                attrib--;
1003          }
1004       }
1005    }
1006
1007    return attrib;
1008 }
1009
1010 static unsigned
1011 locate_linkage(ubyte name, ubyte index, struct tgsi_shader_info *info)
1012 {
1013    for (int i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
1014       if ((info->output_semantic_name[i] == name)
1015           && (info->output_semantic_index[i] == index)) {
1016          return i;
1017       }
1018    }
1019
1020    return 0xFFFFFFFF;
1021 }
1022
1023 PFN_PIXEL_KERNEL
1024 BuilderSWR::CompileFS(struct swr_context *ctx, swr_jit_fs_key &key)
1025 {
1026    struct swr_fragment_shader *swr_fs = ctx->fs;
1027
1028    struct tgsi_shader_info *pPrevShader;
1029    if (ctx->gs)
1030       pPrevShader = &ctx->gs->info.base;
1031    else
1032       pPrevShader = &ctx->vs->info.base;
1033
1034    LLVMValueRef inputs[PIPE_MAX_SHADER_INPUTS][TGSI_NUM_CHANNELS];
1035    LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][TGSI_NUM_CHANNELS];
1036
1037    memset(inputs, 0, sizeof(inputs));
1038    memset(outputs, 0, sizeof(outputs));
1039
1040    struct lp_build_sampler_soa *sampler = NULL;
1041
1042    AttrBuilder attrBuilder;
1043    attrBuilder.addStackAlignmentAttr(JM()->mVWidth * sizeof(float));
1044
1045    std::vector<Type *> fsArgs{PointerType::get(Gen_swr_draw_context(JM()), 0),
1046                               PointerType::get(mInt8Ty, 0),
1047                               PointerType::get(Gen_SWR_PS_CONTEXT(JM()), 0)};
1048    FunctionType *funcType =
1049       FunctionType::get(Type::getVoidTy(JM()->mContext), fsArgs, false);
1050
1051    auto pFunction = Function::Create(funcType,
1052                                      GlobalValue::ExternalLinkage,
1053                                      "FS",
1054                                      JM()->mpCurrentModule);
1055 #if HAVE_LLVM < 0x0500
1056    AttributeSet attrSet = AttributeSet::get(
1057       JM()->mContext, AttributeSet::FunctionIndex, attrBuilder);
1058    pFunction->addAttributes(AttributeSet::FunctionIndex, attrSet);
1059 #else
1060    pFunction->addAttributes(AttributeList::FunctionIndex, attrBuilder);
1061 #endif
1062
1063    BasicBlock *block = BasicBlock::Create(JM()->mContext, "entry", pFunction);
1064    IRB()->SetInsertPoint(block);
1065    LLVMPositionBuilderAtEnd(gallivm->builder, wrap(block));
1066
1067    auto args = pFunction->arg_begin();
1068    Value *hPrivateData = &*args++;
1069    hPrivateData->setName("hPrivateData");
1070    Value *pWorkerData = &*args++;
1071    pWorkerData->setName("pWorkerData");
1072    Value *pPS = &*args++;
1073    pPS->setName("psCtx");
1074
1075    Value *consts_ptr = GEP(hPrivateData, {0, swr_draw_context_constantFS});
1076    consts_ptr->setName("fs_constants");
1077    Value *const_sizes_ptr =
1078       GEP(hPrivateData, {0, swr_draw_context_num_constantsFS});
1079    const_sizes_ptr->setName("num_fs_constants");
1080
1081    // load *pAttribs, *pPerspAttribs
1082    Value *pRawAttribs = LOAD(pPS, {0, SWR_PS_CONTEXT_pAttribs}, "pRawAttribs");
1083    Value *pPerspAttribs =
1084       LOAD(pPS, {0, SWR_PS_CONTEXT_pPerspAttribs}, "pPerspAttribs");
1085
1086    swr_fs->constantMask = 0;
1087    swr_fs->flatConstantMask = 0;
1088    swr_fs->pointSpriteMask = 0;
1089
1090    for (int attrib = 0; attrib < PIPE_MAX_SHADER_INPUTS; attrib++) {
1091       const unsigned mask = swr_fs->info.base.input_usage_mask[attrib];
1092       const unsigned interpMode = swr_fs->info.base.input_interpolate[attrib];
1093       const unsigned interpLoc = swr_fs->info.base.input_interpolate_loc[attrib];
1094
1095       if (!mask)
1096          continue;
1097
1098       // load i,j
1099       Value *vi = nullptr, *vj = nullptr;
1100       switch (interpLoc) {
1101       case TGSI_INTERPOLATE_LOC_CENTER:
1102          vi = LOAD(pPS, {0, SWR_PS_CONTEXT_vI, PixelPositions_center}, "i");
1103          vj = LOAD(pPS, {0, SWR_PS_CONTEXT_vJ, PixelPositions_center}, "j");
1104          break;
1105       case TGSI_INTERPOLATE_LOC_CENTROID:
1106          vi = LOAD(pPS, {0, SWR_PS_CONTEXT_vI, PixelPositions_centroid}, "i");
1107          vj = LOAD(pPS, {0, SWR_PS_CONTEXT_vJ, PixelPositions_centroid}, "j");
1108          break;
1109       case TGSI_INTERPOLATE_LOC_SAMPLE:
1110          vi = LOAD(pPS, {0, SWR_PS_CONTEXT_vI, PixelPositions_sample}, "i");
1111          vj = LOAD(pPS, {0, SWR_PS_CONTEXT_vJ, PixelPositions_sample}, "j");
1112          break;
1113       }
1114
1115       // load/compute w
1116       Value *vw = nullptr, *pAttribs;
1117       if (interpMode == TGSI_INTERPOLATE_PERSPECTIVE ||
1118           interpMode == TGSI_INTERPOLATE_COLOR) {
1119          pAttribs = pPerspAttribs;
1120          switch (interpLoc) {
1121          case TGSI_INTERPOLATE_LOC_CENTER:
1122             vw = VRCP(LOAD(pPS, {0, SWR_PS_CONTEXT_vOneOverW, PixelPositions_center}));
1123             break;
1124          case TGSI_INTERPOLATE_LOC_CENTROID:
1125             vw = VRCP(LOAD(pPS, {0, SWR_PS_CONTEXT_vOneOverW, PixelPositions_centroid}));
1126             break;
1127          case TGSI_INTERPOLATE_LOC_SAMPLE:
1128             vw = VRCP(LOAD(pPS, {0, SWR_PS_CONTEXT_vOneOverW, PixelPositions_sample}));
1129             break;
1130          }
1131       } else {
1132          pAttribs = pRawAttribs;
1133          vw = VIMMED1(1.f);
1134       }
1135
1136       vw->setName("w");
1137
1138       ubyte semantic_name = swr_fs->info.base.input_semantic_name[attrib];
1139       ubyte semantic_idx = swr_fs->info.base.input_semantic_index[attrib];
1140
1141       if (semantic_name == TGSI_SEMANTIC_FACE) {
1142          Value *ff =
1143             UI_TO_FP(LOAD(pPS, {0, SWR_PS_CONTEXT_frontFace}), mFP32Ty);
1144          ff = FSUB(FMUL(ff, C(2.0f)), C(1.0f));
1145          ff = VECTOR_SPLAT(JM()->mVWidth, ff, "vFrontFace");
1146
1147          inputs[attrib][0] = wrap(ff);
1148          inputs[attrib][1] = wrap(VIMMED1(0.0f));
1149          inputs[attrib][2] = wrap(VIMMED1(0.0f));
1150          inputs[attrib][3] = wrap(VIMMED1(1.0f));
1151          continue;
1152       } else if (semantic_name == TGSI_SEMANTIC_POSITION) { // gl_FragCoord
1153          if (swr_fs->info.base.properties[TGSI_PROPERTY_FS_COORD_PIXEL_CENTER] ==
1154              TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER) {
1155             inputs[attrib][0] = wrap(LOAD(pPS, {0, SWR_PS_CONTEXT_vX, PixelPositions_center}, "vX"));
1156             inputs[attrib][1] = wrap(LOAD(pPS, {0, SWR_PS_CONTEXT_vY, PixelPositions_center}, "vY"));
1157          } else {
1158             inputs[attrib][0] = wrap(LOAD(pPS, {0, SWR_PS_CONTEXT_vX, PixelPositions_UL}, "vX"));
1159             inputs[attrib][1] = wrap(LOAD(pPS, {0, SWR_PS_CONTEXT_vY, PixelPositions_UL}, "vY"));
1160          }
1161          inputs[attrib][2] = wrap(LOAD(pPS, {0, SWR_PS_CONTEXT_vZ}, "vZ"));
1162          inputs[attrib][3] =
1163             wrap(LOAD(pPS, {0, SWR_PS_CONTEXT_vOneOverW, PixelPositions_center}, "vOneOverW"));
1164          continue;
1165       }
1166
1167       unsigned linkedAttrib =
1168          locate_linkage(semantic_name, semantic_idx, pPrevShader) - 1;
1169
1170       uint32_t extraAttribs = 0;
1171       if (semantic_name == TGSI_SEMANTIC_PRIMID && !ctx->gs) {
1172          /* non-gs generated primID - need to grab from swizzleMap override */
1173          linkedAttrib = pPrevShader->num_outputs - 1;
1174          swr_fs->constantMask |= 1 << linkedAttrib;
1175          extraAttribs++;
1176       } else if (semantic_name == TGSI_SEMANTIC_GENERIC &&
1177           key.sprite_coord_enable & (1 << semantic_idx)) {
1178          /* we add an extra attrib to the backendState in swr_update_derived. */
1179          linkedAttrib = pPrevShader->num_outputs + extraAttribs - 1;
1180          swr_fs->pointSpriteMask |= (1 << linkedAttrib);
1181          extraAttribs++;
1182       } else if (linkedAttrib == 0xFFFFFFFF) {
1183          inputs[attrib][0] = wrap(VIMMED1(0.0f));
1184          inputs[attrib][1] = wrap(VIMMED1(0.0f));
1185          inputs[attrib][2] = wrap(VIMMED1(0.0f));
1186          inputs[attrib][3] = wrap(VIMMED1(1.0f));
1187          /* If we're reading in color and 2-sided lighting is enabled, we have
1188           * to keep going.
1189           */
1190          if (semantic_name != TGSI_SEMANTIC_COLOR || !key.light_twoside)
1191             continue;
1192       } else {
1193          if (interpMode == TGSI_INTERPOLATE_CONSTANT) {
1194             swr_fs->constantMask |= 1 << linkedAttrib;
1195          } else if (interpMode == TGSI_INTERPOLATE_COLOR) {
1196             swr_fs->flatConstantMask |= 1 << linkedAttrib;
1197          }
1198       }
1199
1200       unsigned bcolorAttrib = 0xFFFFFFFF;
1201       Value *offset = NULL;
1202       if (semantic_name == TGSI_SEMANTIC_COLOR && key.light_twoside) {
1203          bcolorAttrib = locate_linkage(
1204                TGSI_SEMANTIC_BCOLOR, semantic_idx, pPrevShader) - 1;
1205          /* Neither front nor back colors were available. Nothing to load. */
1206          if (bcolorAttrib == 0xFFFFFFFF && linkedAttrib == 0xFFFFFFFF)
1207             continue;
1208          /* If there is no front color, just always use the back color. */
1209          if (linkedAttrib == 0xFFFFFFFF)
1210             linkedAttrib = bcolorAttrib;
1211
1212          if (bcolorAttrib != 0xFFFFFFFF) {
1213             if (interpMode == TGSI_INTERPOLATE_CONSTANT) {
1214                swr_fs->constantMask |= 1 << bcolorAttrib;
1215             } else if (interpMode == TGSI_INTERPOLATE_COLOR) {
1216                swr_fs->flatConstantMask |= 1 << bcolorAttrib;
1217             }
1218
1219             unsigned diff = 12 * (bcolorAttrib - linkedAttrib);
1220
1221             if (diff) {
1222                Value *back =
1223                   XOR(C(1), LOAD(pPS, {0, SWR_PS_CONTEXT_frontFace}), "backFace");
1224
1225                offset = MUL(back, C(diff));
1226                offset->setName("offset");
1227             }
1228          }
1229       }
1230
1231       for (int channel = 0; channel < TGSI_NUM_CHANNELS; channel++) {
1232          if (mask & (1 << channel)) {
1233             Value *indexA = C(linkedAttrib * 12 + channel);
1234             Value *indexB = C(linkedAttrib * 12 + channel + 4);
1235             Value *indexC = C(linkedAttrib * 12 + channel + 8);
1236
1237             if (offset) {
1238                indexA = ADD(indexA, offset);
1239                indexB = ADD(indexB, offset);
1240                indexC = ADD(indexC, offset);
1241             }
1242
1243             Value *va = VBROADCAST(LOAD(GEP(pAttribs, indexA)));
1244             Value *vb = VBROADCAST(LOAD(GEP(pAttribs, indexB)));
1245             Value *vc = VBROADCAST(LOAD(GEP(pAttribs, indexC)));
1246
1247             if (interpMode == TGSI_INTERPOLATE_CONSTANT) {
1248                inputs[attrib][channel] = wrap(va);
1249             } else {
1250                Value *vk = FSUB(FSUB(VIMMED1(1.0f), vi), vj);
1251
1252                vc = FMUL(vk, vc);
1253
1254                Value *interp = FMUL(va, vi);
1255                Value *interp1 = FMUL(vb, vj);
1256                interp = FADD(interp, interp1);
1257                interp = FADD(interp, vc);
1258                if (interpMode == TGSI_INTERPOLATE_PERSPECTIVE ||
1259                    interpMode == TGSI_INTERPOLATE_COLOR)
1260                   interp = FMUL(interp, vw);
1261                inputs[attrib][channel] = wrap(interp);
1262             }
1263          }
1264       }
1265    }
1266
1267    sampler = swr_sampler_soa_create(key.sampler, PIPE_SHADER_FRAGMENT);
1268
1269    struct lp_bld_tgsi_system_values system_values;
1270    memset(&system_values, 0, sizeof(system_values));
1271
1272    struct lp_build_mask_context mask;
1273    bool uses_mask = false;
1274
1275    if (swr_fs->info.base.uses_kill ||
1276        key.poly_stipple_enable) {
1277       Value *vActiveMask = NULL;
1278       if (swr_fs->info.base.uses_kill) {
1279          vActiveMask = LOAD(pPS, {0, SWR_PS_CONTEXT_activeMask}, "activeMask");
1280       }
1281       if (key.poly_stipple_enable) {
1282          // first get fragment xy coords and clip to stipple bounds
1283          Value *vXf = LOAD(pPS, {0, SWR_PS_CONTEXT_vX, PixelPositions_UL});
1284          Value *vYf = LOAD(pPS, {0, SWR_PS_CONTEXT_vY, PixelPositions_UL});
1285          Value *vXu = FP_TO_UI(vXf, mSimdInt32Ty);
1286          Value *vYu = FP_TO_UI(vYf, mSimdInt32Ty);
1287
1288          // stipple pattern is 32x32, which means that one line of stipple
1289          // is stored in one word:
1290          // vXstipple is bit offset inside 32-bit stipple word
1291          // vYstipple is word index is stipple array
1292          Value *vXstipple = AND(vXu, VIMMED1(0x1f)); // & (32-1)
1293          Value *vYstipple = AND(vYu, VIMMED1(0x1f)); // & (32-1)
1294
1295          // grab stipple pattern base address
1296          Value *stipplePtr = GEP(hPrivateData, {0, swr_draw_context_polyStipple, 0});
1297          stipplePtr = BITCAST(stipplePtr, mInt8PtrTy);
1298
1299          // peform a gather to grab stipple words for each lane
1300          Value *vStipple = GATHERDD(VUNDEF_I(), stipplePtr, vYstipple,
1301                                     VIMMED1(0xffffffff), 4);
1302
1303          // create a mask with one bit corresponding to the x stipple
1304          // and AND it with the pattern, to see if we have a bit
1305          Value *vBitMask = LSHR(VIMMED1(0x80000000), vXstipple);
1306          Value *vStippleMask = AND(vStipple, vBitMask);
1307          vStippleMask = ICMP_NE(vStippleMask, VIMMED1(0));
1308          vStippleMask = VMASK(vStippleMask);
1309
1310          if (swr_fs->info.base.uses_kill) {
1311             vActiveMask = AND(vActiveMask, vStippleMask);
1312          } else {
1313             vActiveMask = vStippleMask;
1314          }
1315       }
1316       lp_build_mask_begin(
1317          &mask, gallivm, lp_type_float_vec(32, 32 * 8), wrap(vActiveMask));
1318       uses_mask = true;
1319    }
1320
1321    lp_build_tgsi_soa(gallivm,
1322                      swr_fs->pipe.tokens,
1323                      lp_type_float_vec(32, 32 * 8),
1324                      uses_mask ? &mask : NULL, // mask
1325                      wrap(consts_ptr),
1326                      wrap(const_sizes_ptr),
1327                      &system_values,
1328                      inputs,
1329                      outputs,
1330                      wrap(hPrivateData),
1331                      NULL, // thread data
1332                      sampler, // sampler
1333                      &swr_fs->info.base,
1334                      NULL); // geometry shader face
1335
1336    sampler->destroy(sampler);
1337
1338    IRB()->SetInsertPoint(unwrap(LLVMGetInsertBlock(gallivm->builder)));
1339
1340    for (uint32_t attrib = 0; attrib < swr_fs->info.base.num_outputs;
1341         attrib++) {
1342       switch (swr_fs->info.base.output_semantic_name[attrib]) {
1343       case TGSI_SEMANTIC_POSITION: {
1344          // write z
1345          LLVMValueRef outZ =
1346             LLVMBuildLoad(gallivm->builder, outputs[attrib][2], "");
1347          STORE(unwrap(outZ), pPS, {0, SWR_PS_CONTEXT_vZ});
1348          break;
1349       }
1350       case TGSI_SEMANTIC_COLOR: {
1351          for (uint32_t channel = 0; channel < TGSI_NUM_CHANNELS; channel++) {
1352             if (!outputs[attrib][channel])
1353                continue;
1354
1355             LLVMValueRef out =
1356                LLVMBuildLoad(gallivm->builder, outputs[attrib][channel], "");
1357             if (swr_fs->info.base.properties[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS] &&
1358                 swr_fs->info.base.output_semantic_index[attrib] == 0) {
1359                for (uint32_t rt = 0; rt < key.nr_cbufs; rt++) {
1360                   STORE(unwrap(out),
1361                         pPS,
1362                         {0, SWR_PS_CONTEXT_shaded, rt, channel});
1363                }
1364             } else {
1365                STORE(unwrap(out),
1366                      pPS,
1367                      {0,
1368                            SWR_PS_CONTEXT_shaded,
1369                            swr_fs->info.base.output_semantic_index[attrib],
1370                            channel});
1371             }
1372          }
1373          break;
1374       }
1375       default: {
1376          fprintf(stderr,
1377                  "unknown output from FS %s[%d]\n",
1378                  tgsi_semantic_names[swr_fs->info.base
1379                                         .output_semantic_name[attrib]],
1380                  swr_fs->info.base.output_semantic_index[attrib]);
1381          break;
1382       }
1383       }
1384    }
1385
1386    LLVMValueRef mask_result = 0;
1387    if (uses_mask) {
1388       mask_result = lp_build_mask_end(&mask);
1389    }
1390
1391    IRB()->SetInsertPoint(unwrap(LLVMGetInsertBlock(gallivm->builder)));
1392
1393    if (uses_mask) {
1394       STORE(unwrap(mask_result), pPS, {0, SWR_PS_CONTEXT_activeMask});
1395    }
1396
1397    RET_VOID();
1398
1399    gallivm_verify_function(gallivm, wrap(pFunction));
1400
1401    gallivm_compile_module(gallivm);
1402
1403    // after the gallivm passes, we have to lower the core's intrinsics
1404    llvm::legacy::FunctionPassManager lowerPass(JM()->mpCurrentModule);
1405    lowerPass.add(createLowerX86Pass(this));
1406    lowerPass.run(*pFunction);
1407
1408    PFN_PIXEL_KERNEL kernel =
1409       (PFN_PIXEL_KERNEL)gallivm_jit_function(gallivm, wrap(pFunction));
1410    debug_printf("frag shader  %p\n", kernel);
1411    assert(kernel && "Error: FragShader = NULL");
1412
1413    JM()->mIsModuleFinalized = true;
1414
1415    return kernel;
1416 }
1417
1418 PFN_PIXEL_KERNEL
1419 swr_compile_fs(struct swr_context *ctx, swr_jit_fs_key &key)
1420 {
1421    if (!ctx->fs->pipe.tokens)
1422       return NULL;
1423
1424    BuilderSWR builder(
1425       reinterpret_cast<JitManager *>(swr_screen(ctx->pipe.screen)->hJitMgr),
1426       "FS");
1427    PFN_PIXEL_KERNEL func = builder.CompileFS(ctx, key);
1428
1429    ctx->fs->map.insert(std::make_pair(key, make_unique<VariantFS>(builder.gallivm, func)));
1430    return func;
1431 }