src/mesa/drivers/dri/i965/brw_shader.cpp

   1 /*
   2  * Copyright © 2010 Intel Corporation
   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 #include "brw_context.h"
  25 #include "brw_cfg.h"
  26 #include "brw_eu.h"
  27 #include "brw_fs.h"
  28 #include "brw_nir.h"
  29 #include "brw_vec4_tes.h"
  30 #include "main/uniforms.h"
  31
  32 extern "C" void
  33 brw_mark_surface_used(struct brw_stage_prog_data *prog_data,
  34                       unsigned surf_index)
  35 {
  36    assert(surf_index < BRW_MAX_SURFACES);
  37
  38    prog_data->binding_table.size_bytes =
  39       MAX2(prog_data->binding_table.size_bytes, (surf_index + 1) * 4);
  40 }
  41
  42 enum brw_reg_type
  43 brw_type_for_base_type(const struct glsl_type *type)
  44 {
  45    switch (type->base_type) {
  46    case GLSL_TYPE_FLOAT:
  47       return BRW_REGISTER_TYPE_F;
  48    case GLSL_TYPE_INT:
  49    case GLSL_TYPE_BOOL:
  50    case GLSL_TYPE_SUBROUTINE:
  51       return BRW_REGISTER_TYPE_D;
  52    case GLSL_TYPE_UINT:
  53       return BRW_REGISTER_TYPE_UD;
  54    case GLSL_TYPE_ARRAY:
  55       return brw_type_for_base_type(type->fields.array);
  56    case GLSL_TYPE_STRUCT:
  57    case GLSL_TYPE_SAMPLER:
  58    case GLSL_TYPE_ATOMIC_UINT:
  59       /* These should be overridden with the type of the member when
  60        * dereferenced into.  BRW_REGISTER_TYPE_UD seems like a likely
  61        * way to trip up if we don't.
  62        */
  63       return BRW_REGISTER_TYPE_UD;
  64    case GLSL_TYPE_IMAGE:
  65       return BRW_REGISTER_TYPE_UD;
  66    case GLSL_TYPE_DOUBLE:
  67       return BRW_REGISTER_TYPE_DF;
  68    case GLSL_TYPE_VOID:
  69    case GLSL_TYPE_ERROR:
  70    case GLSL_TYPE_INTERFACE:
  71    case GLSL_TYPE_FUNCTION:
  72       unreachable("not reached");
  73    }
  74
  75    return BRW_REGISTER_TYPE_F;
  76 }
  77
  78 enum brw_conditional_mod
  79 brw_conditional_for_comparison(unsigned int op)
  80 {
  81    switch (op) {
  82    case ir_binop_less:
  83       return BRW_CONDITIONAL_L;
  84    case ir_binop_greater:
  85       return BRW_CONDITIONAL_G;
  86    case ir_binop_lequal:
  87       return BRW_CONDITIONAL_LE;
  88    case ir_binop_gequal:
  89       return BRW_CONDITIONAL_GE;
  90    case ir_binop_equal:
  91    case ir_binop_all_equal: /* same as equal for scalars */
  92       return BRW_CONDITIONAL_Z;
  93    case ir_binop_nequal:
  94    case ir_binop_any_nequal: /* same as nequal for scalars */
  95       return BRW_CONDITIONAL_NZ;
  96    default:
  97       unreachable("not reached: bad operation for comparison");
  98    }
  99 }
 100
 101 uint32_t
 102 brw_math_function(enum opcode op)
 103 {
 104    switch (op) {
 105    case SHADER_OPCODE_RCP:
 106       return BRW_MATH_FUNCTION_INV;
 107    case SHADER_OPCODE_RSQ:
 108       return BRW_MATH_FUNCTION_RSQ;
 109    case SHADER_OPCODE_SQRT:
 110       return BRW_MATH_FUNCTION_SQRT;
 111    case SHADER_OPCODE_EXP2:
 112       return BRW_MATH_FUNCTION_EXP;
 113    case SHADER_OPCODE_LOG2:
 114       return BRW_MATH_FUNCTION_LOG;
 115    case SHADER_OPCODE_POW:
 116       return BRW_MATH_FUNCTION_POW;
 117    case SHADER_OPCODE_SIN:
 118       return BRW_MATH_FUNCTION_SIN;
 119    case SHADER_OPCODE_COS:
 120       return BRW_MATH_FUNCTION_COS;
 121    case SHADER_OPCODE_INT_QUOTIENT:
 122       return BRW_MATH_FUNCTION_INT_DIV_QUOTIENT;
 123    case SHADER_OPCODE_INT_REMAINDER:
 124       return BRW_MATH_FUNCTION_INT_DIV_REMAINDER;
 125    default:
 126       unreachable("not reached: unknown math function");
 127    }
 128 }
 129
 130 uint32_t
 131 brw_texture_offset(int *offsets, unsigned num_components)
 132 {
 133    if (!offsets) return 0;  /* nonconstant offset; caller will handle it. */
 134
 135    /* Combine all three offsets into a single unsigned dword:
 136     *
 137     *    bits 11:8 - U Offset (X component)
 138     *    bits  7:4 - V Offset (Y component)
 139     *    bits  3:0 - R Offset (Z component)
 140     */
 141    unsigned offset_bits = 0;
 142    for (unsigned i = 0; i < num_components; i++) {
 143       const unsigned shift = 4 * (2 - i);
 144       offset_bits |= (offsets[i] << shift) & (0xF << shift);
 145    }
 146    return offset_bits;
 147 }
 148
 149 const char *
 150 brw_instruction_name(const struct brw_device_info *devinfo, enum opcode op)
 151 {
 152    switch (op) {
 153    case BRW_OPCODE_ILLEGAL ... BRW_OPCODE_NOP:
 154       /* The DO instruction doesn't exist on Gen6+, but we use it to mark the
 155        * start of a loop in the IR.
 156        */
 157       if (devinfo->gen >= 6 && op == BRW_OPCODE_DO)
 158          return "do";
 159
 160       assert(brw_opcode_desc(devinfo, op)->name);
 161       return brw_opcode_desc(devinfo, op)->name;
 162    case FS_OPCODE_FB_WRITE:
 163       return "fb_write";
 164    case FS_OPCODE_FB_WRITE_LOGICAL:
 165       return "fb_write_logical";
 166    case FS_OPCODE_PACK_STENCIL_REF:
 167       return "pack_stencil_ref";
 168    case FS_OPCODE_REP_FB_WRITE:
 169       return "rep_fb_write";
 170
 171    case SHADER_OPCODE_RCP:
 172       return "rcp";
 173    case SHADER_OPCODE_RSQ:
 174       return "rsq";
 175    case SHADER_OPCODE_SQRT:
 176       return "sqrt";
 177    case SHADER_OPCODE_EXP2:
 178       return "exp2";
 179    case SHADER_OPCODE_LOG2:
 180       return "log2";
 181    case SHADER_OPCODE_POW:
 182       return "pow";
 183    case SHADER_OPCODE_INT_QUOTIENT:
 184       return "int_quot";
 185    case SHADER_OPCODE_INT_REMAINDER:
 186       return "int_rem";
 187    case SHADER_OPCODE_SIN:
 188       return "sin";
 189    case SHADER_OPCODE_COS:
 190       return "cos";
 191
 192    case SHADER_OPCODE_TEX:
 193       return "tex";
 194    case SHADER_OPCODE_TEX_LOGICAL:
 195       return "tex_logical";
 196    case SHADER_OPCODE_TXD:
 197       return "txd";
 198    case SHADER_OPCODE_TXD_LOGICAL:
 199       return "txd_logical";
 200    case SHADER_OPCODE_TXF:
 201       return "txf";
 202    case SHADER_OPCODE_TXF_LOGICAL:
 203       return "txf_logical";
 204    case SHADER_OPCODE_TXF_LZ:
 205       return "txf_lz";
 206    case SHADER_OPCODE_TXL:
 207       return "txl";
 208    case SHADER_OPCODE_TXL_LOGICAL:
 209       return "txl_logical";
 210    case SHADER_OPCODE_TXL_LZ:
 211       return "txl_lz";
 212    case SHADER_OPCODE_TXS:
 213       return "txs";
 214    case SHADER_OPCODE_TXS_LOGICAL:
 215       return "txs_logical";
 216    case FS_OPCODE_TXB:
 217       return "txb";
 218    case FS_OPCODE_TXB_LOGICAL:
 219       return "txb_logical";
 220    case SHADER_OPCODE_TXF_CMS:
 221       return "txf_cms";
 222    case SHADER_OPCODE_TXF_CMS_LOGICAL:
 223       return "txf_cms_logical";
 224    case SHADER_OPCODE_TXF_CMS_W:
 225       return "txf_cms_w";
 226    case SHADER_OPCODE_TXF_CMS_W_LOGICAL:
 227       return "txf_cms_w_logical";
 228    case SHADER_OPCODE_TXF_UMS:
 229       return "txf_ums";
 230    case SHADER_OPCODE_TXF_UMS_LOGICAL:
 231       return "txf_ums_logical";
 232    case SHADER_OPCODE_TXF_MCS:
 233       return "txf_mcs";
 234    case SHADER_OPCODE_TXF_MCS_LOGICAL:
 235       return "txf_mcs_logical";
 236    case SHADER_OPCODE_LOD:
 237       return "lod";
 238    case SHADER_OPCODE_LOD_LOGICAL:
 239       return "lod_logical";
 240    case SHADER_OPCODE_TG4:
 241       return "tg4";
 242    case SHADER_OPCODE_TG4_LOGICAL:
 243       return "tg4_logical";
 244    case SHADER_OPCODE_TG4_OFFSET:
 245       return "tg4_offset";
 246    case SHADER_OPCODE_TG4_OFFSET_LOGICAL:
 247       return "tg4_offset_logical";
 248    case SHADER_OPCODE_SAMPLEINFO:
 249       return "sampleinfo";
 250
 251    case SHADER_OPCODE_SHADER_TIME_ADD:
 252       return "shader_time_add";
 253
 254    case SHADER_OPCODE_UNTYPED_ATOMIC:
 255       return "untyped_atomic";
 256    case SHADER_OPCODE_UNTYPED_ATOMIC_LOGICAL:
 257       return "untyped_atomic_logical";
 258    case SHADER_OPCODE_UNTYPED_SURFACE_READ:
 259       return "untyped_surface_read";
 260    case SHADER_OPCODE_UNTYPED_SURFACE_READ_LOGICAL:
 261       return "untyped_surface_read_logical";
 262    case SHADER_OPCODE_UNTYPED_SURFACE_WRITE:
 263       return "untyped_surface_write";
 264    case SHADER_OPCODE_UNTYPED_SURFACE_WRITE_LOGICAL:
 265       return "untyped_surface_write_logical";
 266    case SHADER_OPCODE_TYPED_ATOMIC:
 267       return "typed_atomic";
 268    case SHADER_OPCODE_TYPED_ATOMIC_LOGICAL:
 269       return "typed_atomic_logical";
 270    case SHADER_OPCODE_TYPED_SURFACE_READ:
 271       return "typed_surface_read";
 272    case SHADER_OPCODE_TYPED_SURFACE_READ_LOGICAL:
 273       return "typed_surface_read_logical";
 274    case SHADER_OPCODE_TYPED_SURFACE_WRITE:
 275       return "typed_surface_write";
 276    case SHADER_OPCODE_TYPED_SURFACE_WRITE_LOGICAL:
 277       return "typed_surface_write_logical";
 278    case SHADER_OPCODE_MEMORY_FENCE:
 279       return "memory_fence";
 280
 281    case SHADER_OPCODE_LOAD_PAYLOAD:
 282       return "load_payload";
 283    case FS_OPCODE_PACK:
 284       return "pack";
 285
 286    case SHADER_OPCODE_GEN4_SCRATCH_READ:
 287       return "gen4_scratch_read";
 288    case SHADER_OPCODE_GEN4_SCRATCH_WRITE:
 289       return "gen4_scratch_write";
 290    case SHADER_OPCODE_GEN7_SCRATCH_READ:
 291       return "gen7_scratch_read";
 292    case SHADER_OPCODE_URB_WRITE_SIMD8:
 293       return "gen8_urb_write_simd8";
 294    case SHADER_OPCODE_URB_WRITE_SIMD8_PER_SLOT:
 295       return "gen8_urb_write_simd8_per_slot";
 296    case SHADER_OPCODE_URB_WRITE_SIMD8_MASKED:
 297       return "gen8_urb_write_simd8_masked";
 298    case SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT:
 299       return "gen8_urb_write_simd8_masked_per_slot";
 300    case SHADER_OPCODE_URB_READ_SIMD8:
 301       return "urb_read_simd8";
 302    case SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT:
 303       return "urb_read_simd8_per_slot";
 304
 305    case SHADER_OPCODE_FIND_LIVE_CHANNEL:
 306       return "find_live_channel";
 307    case SHADER_OPCODE_BROADCAST:
 308       return "broadcast";
 309
 310    case SHADER_OPCODE_EXTRACT_BYTE:
 311       return "extract_byte";
 312    case SHADER_OPCODE_EXTRACT_WORD:
 313       return "extract_word";
 314    case VEC4_OPCODE_MOV_BYTES:
 315       return "mov_bytes";
 316    case VEC4_OPCODE_PACK_BYTES:
 317       return "pack_bytes";
 318    case VEC4_OPCODE_UNPACK_UNIFORM:
 319       return "unpack_uniform";
 320
 321    case FS_OPCODE_DDX_COARSE:
 322       return "ddx_coarse";
 323    case FS_OPCODE_DDX_FINE:
 324       return "ddx_fine";
 325    case FS_OPCODE_DDY_COARSE:
 326       return "ddy_coarse";
 327    case FS_OPCODE_DDY_FINE:
 328       return "ddy_fine";
 329
 330    case FS_OPCODE_CINTERP:
 331       return "cinterp";
 332    case FS_OPCODE_LINTERP:
 333       return "linterp";
 334
 335    case FS_OPCODE_PIXEL_X:
 336       return "pixel_x";
 337    case FS_OPCODE_PIXEL_Y:
 338       return "pixel_y";
 339
 340    case FS_OPCODE_GET_BUFFER_SIZE:
 341       return "fs_get_buffer_size";
 342
 343    case FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD:
 344       return "uniform_pull_const";
 345    case FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD_GEN7:
 346       return "uniform_pull_const_gen7";
 347    case FS_OPCODE_VARYING_PULL_CONSTANT_LOAD_GEN4:
 348       return "varying_pull_const_gen4";
 349    case FS_OPCODE_VARYING_PULL_CONSTANT_LOAD_GEN7:
 350       return "varying_pull_const_gen7";
 351    case FS_OPCODE_VARYING_PULL_CONSTANT_LOAD_LOGICAL:
 352       return "varying_pull_const_logical";
 353
 354    case FS_OPCODE_MOV_DISPATCH_TO_FLAGS:
 355       return "mov_dispatch_to_flags";
 356    case FS_OPCODE_DISCARD_JUMP:
 357       return "discard_jump";
 358
 359    case FS_OPCODE_SET_SAMPLE_ID:
 360       return "set_sample_id";
 361    case FS_OPCODE_SET_SIMD4X2_OFFSET:
 362       return "set_simd4x2_offset";
 363
 364    case FS_OPCODE_PACK_HALF_2x16_SPLIT:
 365       return "pack_half_2x16_split";
 366    case FS_OPCODE_UNPACK_HALF_2x16_SPLIT_X:
 367       return "unpack_half_2x16_split_x";
 368    case FS_OPCODE_UNPACK_HALF_2x16_SPLIT_Y:
 369       return "unpack_half_2x16_split_y";
 370
 371    case FS_OPCODE_PLACEHOLDER_HALT:
 372       return "placeholder_halt";
 373
 374    case FS_OPCODE_INTERPOLATE_AT_CENTROID:
 375       return "interp_centroid";
 376    case FS_OPCODE_INTERPOLATE_AT_SAMPLE:
 377       return "interp_sample";
 378    case FS_OPCODE_INTERPOLATE_AT_SHARED_OFFSET:
 379       return "interp_shared_offset";
 380    case FS_OPCODE_INTERPOLATE_AT_PER_SLOT_OFFSET:
 381       return "interp_per_slot_offset";
 382
 383    case VS_OPCODE_URB_WRITE:
 384       return "vs_urb_write";
 385    case VS_OPCODE_PULL_CONSTANT_LOAD:
 386       return "pull_constant_load";
 387    case VS_OPCODE_PULL_CONSTANT_LOAD_GEN7:
 388       return "pull_constant_load_gen7";
 389
 390    case VS_OPCODE_SET_SIMD4X2_HEADER_GEN9:
 391       return "set_simd4x2_header_gen9";
 392
 393    case VS_OPCODE_GET_BUFFER_SIZE:
 394       return "vs_get_buffer_size";
 395
 396    case VS_OPCODE_UNPACK_FLAGS_SIMD4X2:
 397       return "unpack_flags_simd4x2";
 398
 399    case GS_OPCODE_URB_WRITE:
 400       return "gs_urb_write";
 401    case GS_OPCODE_URB_WRITE_ALLOCATE:
 402       return "gs_urb_write_allocate";
 403    case GS_OPCODE_THREAD_END:
 404       return "gs_thread_end";
 405    case GS_OPCODE_SET_WRITE_OFFSET:
 406       return "set_write_offset";
 407    case GS_OPCODE_SET_VERTEX_COUNT:
 408       return "set_vertex_count";
 409    case GS_OPCODE_SET_DWORD_2:
 410       return "set_dword_2";
 411    case GS_OPCODE_PREPARE_CHANNEL_MASKS:
 412       return "prepare_channel_masks";
 413    case GS_OPCODE_SET_CHANNEL_MASKS:
 414       return "set_channel_masks";
 415    case GS_OPCODE_GET_INSTANCE_ID:
 416       return "get_instance_id";
 417    case GS_OPCODE_FF_SYNC:
 418       return "ff_sync";
 419    case GS_OPCODE_SET_PRIMITIVE_ID:
 420       return "set_primitive_id";
 421    case GS_OPCODE_SVB_WRITE:
 422       return "gs_svb_write";
 423    case GS_OPCODE_SVB_SET_DST_INDEX:
 424       return "gs_svb_set_dst_index";
 425    case GS_OPCODE_FF_SYNC_SET_PRIMITIVES:
 426       return "gs_ff_sync_set_primitives";
 427    case CS_OPCODE_CS_TERMINATE:
 428       return "cs_terminate";
 429    case SHADER_OPCODE_BARRIER:
 430       return "barrier";
 431    case SHADER_OPCODE_MULH:
 432       return "mulh";
 433    case SHADER_OPCODE_MOV_INDIRECT:
 434       return "mov_indirect";
 435
 436    case VEC4_OPCODE_URB_READ:
 437       return "urb_read";
 438    case TCS_OPCODE_GET_INSTANCE_ID:
 439       return "tcs_get_instance_id";
 440    case TCS_OPCODE_URB_WRITE:
 441       return "tcs_urb_write";
 442    case TCS_OPCODE_SET_INPUT_URB_OFFSETS:
 443       return "tcs_set_input_urb_offsets";
 444    case TCS_OPCODE_SET_OUTPUT_URB_OFFSETS:
 445       return "tcs_set_output_urb_offsets";
 446    case TCS_OPCODE_GET_PRIMITIVE_ID:
 447       return "tcs_get_primitive_id";
 448    case TCS_OPCODE_CREATE_BARRIER_HEADER:
 449       return "tcs_create_barrier_header";
 450    case TCS_OPCODE_SRC0_010_IS_ZERO:
 451       return "tcs_src0<0,1,0>_is_zero";
 452    case TCS_OPCODE_RELEASE_INPUT:
 453       return "tcs_release_input";
 454    case TCS_OPCODE_THREAD_END:
 455       return "tcs_thread_end";
 456    case TES_OPCODE_CREATE_INPUT_READ_HEADER:
 457       return "tes_create_input_read_header";
 458    case TES_OPCODE_ADD_INDIRECT_URB_OFFSET:
 459       return "tes_add_indirect_urb_offset";
 460    case TES_OPCODE_GET_PRIMITIVE_ID:
 461       return "tes_get_primitive_id";
 462    }
 463
 464    unreachable("not reached");
 465 }
 466
 467 bool
 468 brw_saturate_immediate(enum brw_reg_type type, struct brw_reg *reg)
 469 {
 470    union {
 471       unsigned ud;
 472       int d;
 473       float f;
 474       double df;
 475    } imm, sat_imm = { 0 };
 476
 477    const unsigned size = type_sz(type);
 478
 479    /* We want to either do a 32-bit or 64-bit data copy, the type is otherwise
 480     * irrelevant, so just check the size of the type and copy from/to an
 481     * appropriately sized field.
 482     */
 483    if (size < 8)
 484       imm.ud = reg->ud;
 485    else
 486       imm.df = reg->df;
 487
 488    switch (type) {
 489    case BRW_REGISTER_TYPE_UD:
 490    case BRW_REGISTER_TYPE_D:
 491    case BRW_REGISTER_TYPE_UW:
 492    case BRW_REGISTER_TYPE_W:
 493    case BRW_REGISTER_TYPE_UQ:
 494    case BRW_REGISTER_TYPE_Q:
 495       /* Nothing to do. */
 496       return false;
 497    case BRW_REGISTER_TYPE_F:
 498       sat_imm.f = CLAMP(imm.f, 0.0f, 1.0f);
 499       break;
 500    case BRW_REGISTER_TYPE_DF:
 501       sat_imm.df = CLAMP(imm.df, 0.0, 1.0);
 502       break;
 503    case BRW_REGISTER_TYPE_UB:
 504    case BRW_REGISTER_TYPE_B:
 505       unreachable("no UB/B immediates");
 506    case BRW_REGISTER_TYPE_V:
 507    case BRW_REGISTER_TYPE_UV:
 508    case BRW_REGISTER_TYPE_VF:
 509       unreachable("unimplemented: saturate vector immediate");
 510    case BRW_REGISTER_TYPE_HF:
 511       unreachable("unimplemented: saturate HF immediate");
 512    }
 513
 514    if (size < 8) {
 515       if (imm.ud != sat_imm.ud) {
 516          reg->ud = sat_imm.ud;
 517          return true;
 518       }
 519    } else {
 520       if (imm.df != sat_imm.df) {
 521          reg->df = sat_imm.df;
 522          return true;
 523       }
 524    }
 525    return false;
 526 }
 527
 528 bool
 529 brw_negate_immediate(enum brw_reg_type type, struct brw_reg *reg)
 530 {
 531    switch (type) {
 532    case BRW_REGISTER_TYPE_D:
 533    case BRW_REGISTER_TYPE_UD:
 534       reg->d = -reg->d;
 535       return true;
 536    case BRW_REGISTER_TYPE_W:
 537    case BRW_REGISTER_TYPE_UW:
 538       reg->d = -(int16_t)reg->ud;
 539       return true;
 540    case BRW_REGISTER_TYPE_F:
 541       reg->f = -reg->f;
 542       return true;
 543    case BRW_REGISTER_TYPE_VF:
 544       reg->ud ^= 0x80808080;
 545       return true;
 546    case BRW_REGISTER_TYPE_DF:
 547       reg->df = -reg->df;
 548       return true;
 549    case BRW_REGISTER_TYPE_UB:
 550    case BRW_REGISTER_TYPE_B:
 551       unreachable("no UB/B immediates");
 552    case BRW_REGISTER_TYPE_UV:
 553    case BRW_REGISTER_TYPE_V:
 554       assert(!"unimplemented: negate UV/V immediate");
 555    case BRW_REGISTER_TYPE_UQ:
 556    case BRW_REGISTER_TYPE_Q:
 557       assert(!"unimplemented: negate UQ/Q immediate");
 558    case BRW_REGISTER_TYPE_HF:
 559       assert(!"unimplemented: negate HF immediate");
 560    }
 561
 562    return false;
 563 }
 564
 565 bool
 566 brw_abs_immediate(enum brw_reg_type type, struct brw_reg *reg)
 567 {
 568    switch (type) {
 569    case BRW_REGISTER_TYPE_D:
 570       reg->d = abs(reg->d);
 571       return true;
 572    case BRW_REGISTER_TYPE_W:
 573       reg->d = abs((int16_t)reg->ud);
 574       return true;
 575    case BRW_REGISTER_TYPE_F:
 576       reg->f = fabsf(reg->f);
 577       return true;
 578    case BRW_REGISTER_TYPE_DF:
 579       reg->df = fabs(reg->df);
 580       return true;
 581    case BRW_REGISTER_TYPE_VF:
 582       reg->ud &= ~0x80808080;
 583       return true;
 584    case BRW_REGISTER_TYPE_UB:
 585    case BRW_REGISTER_TYPE_B:
 586       unreachable("no UB/B immediates");
 587    case BRW_REGISTER_TYPE_UQ:
 588    case BRW_REGISTER_TYPE_UD:
 589    case BRW_REGISTER_TYPE_UW:
 590    case BRW_REGISTER_TYPE_UV:
 591       /* Presumably the absolute value modifier on an unsigned source is a
 592        * nop, but it would be nice to confirm.
 593        */
 594       assert(!"unimplemented: abs unsigned immediate");
 595    case BRW_REGISTER_TYPE_V:
 596       assert(!"unimplemented: abs V immediate");
 597    case BRW_REGISTER_TYPE_Q:
 598       assert(!"unimplemented: abs Q immediate");
 599    case BRW_REGISTER_TYPE_HF:
 600       assert(!"unimplemented: abs HF immediate");
 601    }
 602
 603    return false;
 604 }
 605
 606 unsigned
 607 tesslevel_outer_components(GLenum tes_primitive_mode)
 608 {
 609    switch (tes_primitive_mode) {
 610    case GL_QUADS:
 611       return 4;
 612    case GL_TRIANGLES:
 613       return 3;
 614    case GL_ISOLINES:
 615       return 2;
 616    default:
 617       unreachable("Bogus tessellation domain");
 618    }
 619    return 0;
 620 }
 621
 622 unsigned
 623 tesslevel_inner_components(GLenum tes_primitive_mode)
 624 {
 625    switch (tes_primitive_mode) {
 626    case GL_QUADS:
 627       return 2;
 628    case GL_TRIANGLES:
 629       return 1;
 630    case GL_ISOLINES:
 631       return 0;
 632    default:
 633       unreachable("Bogus tessellation domain");
 634    }
 635    return 0;
 636 }
 637
 638 /**
 639  * Given a normal .xyzw writemask, convert it to a writemask for a vector
 640  * that's stored backwards, i.e. .wzyx.
 641  */
 642 unsigned
 643 writemask_for_backwards_vector(unsigned mask)
 644 {
 645    unsigned new_mask = 0;
 646
 647    for (int i = 0; i < 4; i++)
 648       new_mask |= ((mask >> i) & 1) << (3 - i);
 649
 650    return new_mask;
 651 }
 652
 653 backend_shader::backend_shader(const struct brw_compiler *compiler,
 654                                void *log_data,
 655                                void *mem_ctx,
 656                                const nir_shader *shader,
 657                                struct brw_stage_prog_data *stage_prog_data)
 658    : compiler(compiler),
 659      log_data(log_data),
 660      devinfo(compiler->devinfo),
 661      nir(shader),
 662      stage_prog_data(stage_prog_data),
 663      mem_ctx(mem_ctx),
 664      cfg(NULL),
 665      stage(shader->stage)
 666 {
 667    debug_enabled = INTEL_DEBUG & intel_debug_flag_for_shader_stage(stage);
 668    stage_name = _mesa_shader_stage_to_string(stage);
 669    stage_abbrev = _mesa_shader_stage_to_abbrev(stage);
 670    is_passthrough_shader =
 671       nir->info.name && strcmp(nir->info.name, "passthrough") == 0;
 672 }
 673
 674 bool
 675 backend_reg::equals(const backend_reg &r) const
 676 {
 677    return brw_regs_equal(this, &r) && reg_offset == r.reg_offset;
 678 }
 679
 680 bool
 681 backend_reg::is_zero() const
 682 {
 683    if (file != IMM)
 684       return false;
 685
 686    switch (type) {
 687    case BRW_REGISTER_TYPE_F:
 688       return f == 0;
 689    case BRW_REGISTER_TYPE_DF:
 690       return df == 0;
 691    case BRW_REGISTER_TYPE_D:
 692    case BRW_REGISTER_TYPE_UD:
 693       return d == 0;
 694    default:
 695       return false;
 696    }
 697 }
 698
 699 bool
 700 backend_reg::is_one() const
 701 {
 702    if (file != IMM)
 703       return false;
 704
 705    switch (type) {
 706    case BRW_REGISTER_TYPE_F:
 707       return f == 1.0f;
 708    case BRW_REGISTER_TYPE_DF:
 709       return df == 1.0;
 710    case BRW_REGISTER_TYPE_D:
 711    case BRW_REGISTER_TYPE_UD:
 712       return d == 1;
 713    default:
 714       return false;
 715    }
 716 }
 717
 718 bool
 719 backend_reg::is_negative_one() const
 720 {
 721    if (file != IMM)
 722       return false;
 723
 724    switch (type) {
 725    case BRW_REGISTER_TYPE_F:
 726       return f == -1.0;
 727    case BRW_REGISTER_TYPE_DF:
 728       return df == -1.0;
 729    case BRW_REGISTER_TYPE_D:
 730       return d == -1;
 731    default:
 732       return false;
 733    }
 734 }
 735
 736 bool
 737 backend_reg::is_null() const
 738 {
 739    return file == ARF && nr == BRW_ARF_NULL;
 740 }
 741
 742
 743 bool
 744 backend_reg::is_accumulator() const
 745 {
 746    return file == ARF && nr == BRW_ARF_ACCUMULATOR;
 747 }
 748
 749 bool
 750 backend_reg::in_range(const backend_reg &r, unsigned n) const
 751 {
 752    return (file == r.file &&
 753            nr == r.nr &&
 754            reg_offset >= r.reg_offset &&
 755            reg_offset < r.reg_offset + n);
 756 }
 757
 758 bool
 759 backend_instruction::is_commutative() const
 760 {
 761    switch (opcode) {
 762    case BRW_OPCODE_AND:
 763    case BRW_OPCODE_OR:
 764    case BRW_OPCODE_XOR:
 765    case BRW_OPCODE_ADD:
 766    case BRW_OPCODE_MUL:
 767    case SHADER_OPCODE_MULH:
 768       return true;
 769    case BRW_OPCODE_SEL:
 770       /* MIN and MAX are commutative. */
 771       if (conditional_mod == BRW_CONDITIONAL_GE ||
 772           conditional_mod == BRW_CONDITIONAL_L) {
 773          return true;
 774       }
 775       /* fallthrough */
 776    default:
 777       return false;
 778    }
 779 }
 780
 781 bool
 782 backend_instruction::is_3src(const struct brw_device_info *devinfo) const
 783 {
 784    return ::is_3src(devinfo, opcode);
 785 }
 786
 787 bool
 788 backend_instruction::is_tex() const
 789 {
 790    return (opcode == SHADER_OPCODE_TEX ||
 791            opcode == FS_OPCODE_TXB ||
 792            opcode == SHADER_OPCODE_TXD ||
 793            opcode == SHADER_OPCODE_TXF ||
 794            opcode == SHADER_OPCODE_TXF_LZ ||
 795            opcode == SHADER_OPCODE_TXF_CMS ||
 796            opcode == SHADER_OPCODE_TXF_CMS_W ||
 797            opcode == SHADER_OPCODE_TXF_UMS ||
 798            opcode == SHADER_OPCODE_TXF_MCS ||
 799            opcode == SHADER_OPCODE_TXL ||
 800            opcode == SHADER_OPCODE_TXL_LZ ||
 801            opcode == SHADER_OPCODE_TXS ||
 802            opcode == SHADER_OPCODE_LOD ||
 803            opcode == SHADER_OPCODE_TG4 ||
 804            opcode == SHADER_OPCODE_TG4_OFFSET ||
 805            opcode == SHADER_OPCODE_SAMPLEINFO);
 806 }
 807
 808 bool
 809 backend_instruction::is_math() const
 810 {
 811    return (opcode == SHADER_OPCODE_RCP ||
 812            opcode == SHADER_OPCODE_RSQ ||
 813            opcode == SHADER_OPCODE_SQRT ||
 814            opcode == SHADER_OPCODE_EXP2 ||
 815            opcode == SHADER_OPCODE_LOG2 ||
 816            opcode == SHADER_OPCODE_SIN ||
 817            opcode == SHADER_OPCODE_COS ||
 818            opcode == SHADER_OPCODE_INT_QUOTIENT ||
 819            opcode == SHADER_OPCODE_INT_REMAINDER ||
 820            opcode == SHADER_OPCODE_POW);
 821 }
 822
 823 bool
 824 backend_instruction::is_control_flow() const
 825 {
 826    switch (opcode) {
 827    case BRW_OPCODE_DO:
 828    case BRW_OPCODE_WHILE:
 829    case BRW_OPCODE_IF:
 830    case BRW_OPCODE_ELSE:
 831    case BRW_OPCODE_ENDIF:
 832    case BRW_OPCODE_BREAK:
 833    case BRW_OPCODE_CONTINUE:
 834       return true;
 835    default:
 836       return false;
 837    }
 838 }
 839
 840 bool
 841 backend_instruction::can_do_source_mods() const
 842 {
 843    switch (opcode) {
 844    case BRW_OPCODE_ADDC:
 845    case BRW_OPCODE_BFE:
 846    case BRW_OPCODE_BFI1:
 847    case BRW_OPCODE_BFI2:
 848    case BRW_OPCODE_BFREV:
 849    case BRW_OPCODE_CBIT:
 850    case BRW_OPCODE_FBH:
 851    case BRW_OPCODE_FBL:
 852    case BRW_OPCODE_SUBB:
 853       return false;
 854    default:
 855       return true;
 856    }
 857 }
 858
 859 bool
 860 backend_instruction::can_do_saturate() const
 861 {
 862    switch (opcode) {
 863    case BRW_OPCODE_ADD:
 864    case BRW_OPCODE_ASR:
 865    case BRW_OPCODE_AVG:
 866    case BRW_OPCODE_DP2:
 867    case BRW_OPCODE_DP3:
 868    case BRW_OPCODE_DP4:
 869    case BRW_OPCODE_DPH:
 870    case BRW_OPCODE_F16TO32:
 871    case BRW_OPCODE_F32TO16:
 872    case BRW_OPCODE_LINE:
 873    case BRW_OPCODE_LRP:
 874    case BRW_OPCODE_MAC:
 875    case BRW_OPCODE_MAD:
 876    case BRW_OPCODE_MATH:
 877    case BRW_OPCODE_MOV:
 878    case BRW_OPCODE_MUL:
 879    case SHADER_OPCODE_MULH:
 880    case BRW_OPCODE_PLN:
 881    case BRW_OPCODE_RNDD:
 882    case BRW_OPCODE_RNDE:
 883    case BRW_OPCODE_RNDU:
 884    case BRW_OPCODE_RNDZ:
 885    case BRW_OPCODE_SEL:
 886    case BRW_OPCODE_SHL:
 887    case BRW_OPCODE_SHR:
 888    case FS_OPCODE_LINTERP:
 889    case SHADER_OPCODE_COS:
 890    case SHADER_OPCODE_EXP2:
 891    case SHADER_OPCODE_LOG2:
 892    case SHADER_OPCODE_POW:
 893    case SHADER_OPCODE_RCP:
 894    case SHADER_OPCODE_RSQ:
 895    case SHADER_OPCODE_SIN:
 896    case SHADER_OPCODE_SQRT:
 897       return true;
 898    default:
 899       return false;
 900    }
 901 }
 902
 903 bool
 904 backend_instruction::can_do_cmod() const
 905 {
 906    switch (opcode) {
 907    case BRW_OPCODE_ADD:
 908    case BRW_OPCODE_ADDC:
 909    case BRW_OPCODE_AND:
 910    case BRW_OPCODE_ASR:
 911    case BRW_OPCODE_AVG:
 912    case BRW_OPCODE_CMP:
 913    case BRW_OPCODE_CMPN:
 914    case BRW_OPCODE_DP2:
 915    case BRW_OPCODE_DP3:
 916    case BRW_OPCODE_DP4:
 917    case BRW_OPCODE_DPH:
 918    case BRW_OPCODE_F16TO32:
 919    case BRW_OPCODE_F32TO16:
 920    case BRW_OPCODE_FRC:
 921    case BRW_OPCODE_LINE:
 922    case BRW_OPCODE_LRP:
 923    case BRW_OPCODE_LZD:
 924    case BRW_OPCODE_MAC:
 925    case BRW_OPCODE_MACH:
 926    case BRW_OPCODE_MAD:
 927    case BRW_OPCODE_MOV:
 928    case BRW_OPCODE_MUL:
 929    case BRW_OPCODE_NOT:
 930    case BRW_OPCODE_OR:
 931    case BRW_OPCODE_PLN:
 932    case BRW_OPCODE_RNDD:
 933    case BRW_OPCODE_RNDE:
 934    case BRW_OPCODE_RNDU:
 935    case BRW_OPCODE_RNDZ:
 936    case BRW_OPCODE_SAD2:
 937    case BRW_OPCODE_SADA2:
 938    case BRW_OPCODE_SHL:
 939    case BRW_OPCODE_SHR:
 940    case BRW_OPCODE_SUBB:
 941    case BRW_OPCODE_XOR:
 942    case FS_OPCODE_CINTERP:
 943    case FS_OPCODE_LINTERP:
 944       return true;
 945    default:
 946       return false;
 947    }
 948 }
 949
 950 bool
 951 backend_instruction::reads_accumulator_implicitly() const
 952 {
 953    switch (opcode) {
 954    case BRW_OPCODE_MAC:
 955    case BRW_OPCODE_MACH:
 956    case BRW_OPCODE_SADA2:
 957       return true;
 958    default:
 959       return false;
 960    }
 961 }
 962
 963 bool
 964 backend_instruction::writes_accumulator_implicitly(const struct brw_device_info *devinfo) const
 965 {
 966    return writes_accumulator ||
 967           (devinfo->gen < 6 &&
 968            ((opcode >= BRW_OPCODE_ADD && opcode < BRW_OPCODE_NOP) ||
 969             (opcode >= FS_OPCODE_DDX_COARSE && opcode <= FS_OPCODE_LINTERP &&
 970              opcode != FS_OPCODE_CINTERP)));
 971 }
 972
 973 bool
 974 backend_instruction::has_side_effects() const
 975 {
 976    switch (opcode) {
 977    case SHADER_OPCODE_UNTYPED_ATOMIC:
 978    case SHADER_OPCODE_UNTYPED_ATOMIC_LOGICAL:
 979    case SHADER_OPCODE_GEN4_SCRATCH_WRITE:
 980    case SHADER_OPCODE_UNTYPED_SURFACE_WRITE:
 981    case SHADER_OPCODE_UNTYPED_SURFACE_WRITE_LOGICAL:
 982    case SHADER_OPCODE_TYPED_ATOMIC:
 983    case SHADER_OPCODE_TYPED_ATOMIC_LOGICAL:
 984    case SHADER_OPCODE_TYPED_SURFACE_WRITE:
 985    case SHADER_OPCODE_TYPED_SURFACE_WRITE_LOGICAL:
 986    case SHADER_OPCODE_MEMORY_FENCE:
 987    case SHADER_OPCODE_URB_WRITE_SIMD8:
 988    case SHADER_OPCODE_URB_WRITE_SIMD8_PER_SLOT:
 989    case SHADER_OPCODE_URB_WRITE_SIMD8_MASKED:
 990    case SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT:
 991    case FS_OPCODE_FB_WRITE:
 992    case SHADER_OPCODE_BARRIER:
 993    case TCS_OPCODE_URB_WRITE:
 994    case TCS_OPCODE_RELEASE_INPUT:
 995       return true;
 996    default:
 997       return false;
 998    }
 999 }
1000
1001 bool
1002 backend_instruction::is_volatile() const
1003 {
1004    switch (opcode) {
1005    case SHADER_OPCODE_UNTYPED_SURFACE_READ:
1006    case SHADER_OPCODE_UNTYPED_SURFACE_READ_LOGICAL:
1007    case SHADER_OPCODE_TYPED_SURFACE_READ:
1008    case SHADER_OPCODE_TYPED_SURFACE_READ_LOGICAL:
1009    case SHADER_OPCODE_URB_READ_SIMD8:
1010    case SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT:
1011    case VEC4_OPCODE_URB_READ:
1012       return true;
1013    default:
1014       return false;
1015    }
1016 }
1017
1018 #ifndef NDEBUG
1019 static bool
1020 inst_is_in_block(const bblock_t *block, const backend_instruction *inst)
1021 {
1022    bool found = false;
1023    foreach_inst_in_block (backend_instruction, i, block) {
1024       if (inst == i) {
1025          found = true;
1026       }
1027    }
1028    return found;
1029 }
1030 #endif
1031
1032 static void
1033 adjust_later_block_ips(bblock_t *start_block, int ip_adjustment)
1034 {
1035    for (bblock_t *block_iter = start_block->next();
1036         block_iter;
1037         block_iter = block_iter->next()) {
1038       block_iter->start_ip += ip_adjustment;
1039       block_iter->end_ip += ip_adjustment;
1040    }
1041 }
1042
1043 void
1044 backend_instruction::insert_after(bblock_t *block, backend_instruction *inst)
1045 {
1046    assert(this != inst);
1047
1048    if (!this->is_head_sentinel())
1049       assert(inst_is_in_block(block, this) || !"Instruction not in block");
1050
1051    block->end_ip++;
1052
1053    adjust_later_block_ips(block, 1);
1054
1055    exec_node::insert_after(inst);
1056 }
1057
1058 void
1059 backend_instruction::insert_before(bblock_t *block, backend_instruction *inst)
1060 {
1061    assert(this != inst);
1062
1063    if (!this->is_tail_sentinel())
1064       assert(inst_is_in_block(block, this) || !"Instruction not in block");
1065
1066    block->end_ip++;
1067
1068    adjust_later_block_ips(block, 1);
1069
1070    exec_node::insert_before(inst);
1071 }
1072
1073 void
1074 backend_instruction::insert_before(bblock_t *block, exec_list *list)
1075 {
1076    assert(inst_is_in_block(block, this) || !"Instruction not in block");
1077
1078    unsigned num_inst = list->length();
1079
1080    block->end_ip += num_inst;
1081
1082    adjust_later_block_ips(block, num_inst);
1083
1084    exec_node::insert_before(list);
1085 }
1086
1087 void
1088 backend_instruction::remove(bblock_t *block)
1089 {
1090    assert(inst_is_in_block(block, this) || !"Instruction not in block");
1091
1092    adjust_later_block_ips(block, -1);
1093
1094    if (block->start_ip == block->end_ip) {
1095       block->cfg->remove_block(block);
1096    } else {
1097       block->end_ip--;
1098    }
1099
1100    exec_node::remove();
1101 }
1102
1103 void
1104 backend_shader::dump_instructions()
1105 {
1106    dump_instructions(NULL);
1107 }
1108
1109 void
1110 backend_shader::dump_instructions(const char *name)
1111 {
1112    FILE *file = stderr;
1113    if (name && geteuid() != 0) {
1114       file = fopen(name, "w");
1115       if (!file)
1116          file = stderr;
1117    }
1118
1119    if (cfg) {
1120       int ip = 0;
1121       foreach_block_and_inst(block, backend_instruction, inst, cfg) {
1122          if (!unlikely(INTEL_DEBUG & DEBUG_OPTIMIZER))
1123             fprintf(file, "%4d: ", ip++);
1124          dump_instruction(inst, file);
1125       }
1126    } else {
1127       int ip = 0;
1128       foreach_in_list(backend_instruction, inst, &instructions) {
1129          if (!unlikely(INTEL_DEBUG & DEBUG_OPTIMIZER))
1130             fprintf(file, "%4d: ", ip++);
1131          dump_instruction(inst, file);
1132       }
1133    }
1134
1135    if (file != stderr) {
1136       fclose(file);
1137    }
1138 }
1139
1140 void
1141 backend_shader::calculate_cfg()
1142 {
1143    if (this->cfg)
1144       return;
1145    cfg = new(mem_ctx) cfg_t(&this->instructions);
1146 }
1147
1148 /**
1149  * Sets up the starting offsets for the groups of binding table entries
1150  * commong to all pipeline stages.
1151  *
1152  * Unused groups are initialized to 0xd0d0d0d0 to make it obvious that they're
1153  * unused but also make sure that addition of small offsets to them will
1154  * trigger some of our asserts that surface indices are < BRW_MAX_SURFACES.
1155  */
1156 void
1157 brw_assign_common_binding_table_offsets(gl_shader_stage stage,
1158                                         const struct brw_device_info *devinfo,
1159                                         const struct gl_shader_program *shader_prog,
1160                                         const struct gl_program *prog,
1161                                         struct brw_stage_prog_data *stage_prog_data,
1162                                         uint32_t next_binding_table_offset)
1163 {
1164    const struct gl_shader *shader = NULL;
1165    int num_textures = _mesa_fls(prog->SamplersUsed);
1166
1167    if (shader_prog)
1168       shader = shader_prog->_LinkedShaders[stage];
1169
1170    stage_prog_data->binding_table.texture_start = next_binding_table_offset;
1171    next_binding_table_offset += num_textures;
1172
1173    if (shader) {
1174       assert(shader->NumUniformBlocks <= BRW_MAX_UBO);
1175       stage_prog_data->binding_table.ubo_start = next_binding_table_offset;
1176       next_binding_table_offset += shader->NumUniformBlocks;
1177
1178       assert(shader->NumShaderStorageBlocks <= BRW_MAX_SSBO);
1179       stage_prog_data->binding_table.ssbo_start = next_binding_table_offset;
1180       next_binding_table_offset += shader->NumShaderStorageBlocks;
1181    } else {
1182       stage_prog_data->binding_table.ubo_start = 0xd0d0d0d0;
1183       stage_prog_data->binding_table.ssbo_start = 0xd0d0d0d0;
1184    }
1185
1186    if (INTEL_DEBUG & DEBUG_SHADER_TIME) {
1187       stage_prog_data->binding_table.shader_time_start = next_binding_table_offset;
1188       next_binding_table_offset++;
1189    } else {
1190       stage_prog_data->binding_table.shader_time_start = 0xd0d0d0d0;
1191    }
1192
1193    if (prog->UsesGather) {
1194       if (devinfo->gen >= 8) {
1195          stage_prog_data->binding_table.gather_texture_start =
1196             stage_prog_data->binding_table.texture_start;
1197       } else {
1198          stage_prog_data->binding_table.gather_texture_start = next_binding_table_offset;
1199          next_binding_table_offset += num_textures;
1200       }
1201    } else {
1202       stage_prog_data->binding_table.gather_texture_start = 0xd0d0d0d0;
1203    }
1204
1205    if (shader && shader->NumAtomicBuffers) {
1206       stage_prog_data->binding_table.abo_start = next_binding_table_offset;
1207       next_binding_table_offset += shader->NumAtomicBuffers;
1208    } else {
1209       stage_prog_data->binding_table.abo_start = 0xd0d0d0d0;
1210    }
1211
1212    if (shader && shader->NumImages) {
1213       stage_prog_data->binding_table.image_start = next_binding_table_offset;
1214       next_binding_table_offset += shader->NumImages;
1215    } else {
1216       stage_prog_data->binding_table.image_start = 0xd0d0d0d0;
1217    }
1218
1219    /* This may or may not be used depending on how the compile goes. */
1220    stage_prog_data->binding_table.pull_constants_start = next_binding_table_offset;
1221    next_binding_table_offset++;
1222
1223    /* Plane 0 is just the regular texture section */
1224    stage_prog_data->binding_table.plane_start[0] = stage_prog_data->binding_table.texture_start;
1225
1226    stage_prog_data->binding_table.plane_start[1] = next_binding_table_offset;
1227    next_binding_table_offset += num_textures;
1228
1229    stage_prog_data->binding_table.plane_start[2] = next_binding_table_offset;
1230    next_binding_table_offset += num_textures;
1231
1232    assert(next_binding_table_offset <= BRW_MAX_SURFACES);
1233
1234    /* prog_data->base.binding_table.size will be set by brw_mark_surface_used. */
1235 }
1236
1237 static void
1238 setup_vec4_uniform_value(const gl_constant_value **params,
1239                          const gl_constant_value *values,
1240                          unsigned n)
1241 {
1242    static const gl_constant_value zero = { 0 };
1243
1244    for (unsigned i = 0; i < n; ++i)
1245       params[i] = &values[i];
1246
1247    for (unsigned i = n; i < 4; ++i)
1248       params[i] = &zero;
1249 }
1250
1251 void
1252 brw_setup_image_uniform_values(gl_shader_stage stage,
1253                                struct brw_stage_prog_data *stage_prog_data,
1254                                unsigned param_start_index,
1255                                const gl_uniform_storage *storage)
1256 {
1257    const gl_constant_value **param =
1258       &stage_prog_data->param[param_start_index];
1259
1260    for (unsigned i = 0; i < MAX2(storage->array_elements, 1); i++) {
1261       const unsigned image_idx = storage->opaque[stage].index + i;
1262       const brw_image_param *image_param =
1263          &stage_prog_data->image_param[image_idx];
1264
1265       /* Upload the brw_image_param structure.  The order is expected to match
1266        * the BRW_IMAGE_PARAM_*_OFFSET defines.
1267        */
1268       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_SURFACE_IDX_OFFSET,
1269          (const gl_constant_value *)&image_param->surface_idx, 1);
1270       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_OFFSET_OFFSET,
1271          (const gl_constant_value *)image_param->offset, 2);
1272       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_SIZE_OFFSET,
1273          (const gl_constant_value *)image_param->size, 3);
1274       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_STRIDE_OFFSET,
1275          (const gl_constant_value *)image_param->stride, 4);
1276       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_TILING_OFFSET,
1277          (const gl_constant_value *)image_param->tiling, 3);
1278       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_SWIZZLING_OFFSET,
1279          (const gl_constant_value *)image_param->swizzling, 2);
1280       param += BRW_IMAGE_PARAM_SIZE;
1281
1282       brw_mark_surface_used(
1283          stage_prog_data,
1284          stage_prog_data->binding_table.image_start + image_idx);
1285    }
1286 }
1287
1288 /**
1289  * Decide which set of clip planes should be used when clipping via
1290  * gl_Position or gl_ClipVertex.
1291  */
1292 gl_clip_plane *brw_select_clip_planes(struct gl_context *ctx)
1293 {
1294    if (ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX]) {
1295       /* There is currently a GLSL vertex shader, so clip according to GLSL
1296        * rules, which means compare gl_ClipVertex (or gl_Position, if
1297        * gl_ClipVertex wasn't assigned) against the eye-coordinate clip planes
1298        * that were stored in EyeUserPlane at the time the clip planes were
1299        * specified.
1300        */
1301       return ctx->Transform.EyeUserPlane;
1302    } else {
1303       /* Either we are using fixed function or an ARB vertex program.  In
1304        * either case the clip planes are going to be compared against
1305        * gl_Position (which is in clip coordinates) so we have to clip using
1306        * _ClipUserPlane, which was transformed into clip coordinates by Mesa
1307        * core.
1308        */
1309       return ctx->Transform._ClipUserPlane;
1310    }
1311 }
1312
1313 extern "C" const unsigned *
1314 brw_compile_tes(const struct brw_compiler *compiler,
1315                 void *log_data,
1316                 void *mem_ctx,
1317                 const struct brw_tes_prog_key *key,
1318                 struct brw_tes_prog_data *prog_data,
1319                 const nir_shader *src_shader,
1320                 struct gl_shader_program *shader_prog,
1321                 int shader_time_index,
1322                 unsigned *final_assembly_size,
1323                 char **error_str)
1324 {
1325    const struct brw_device_info *devinfo = compiler->devinfo;
1326    struct gl_shader *shader =
1327       shader_prog->_LinkedShaders[MESA_SHADER_TESS_EVAL];
1328    const bool is_scalar = compiler->scalar_stage[MESA_SHADER_TESS_EVAL];
1329
1330    nir_shader *nir = nir_shader_clone(mem_ctx, src_shader);
1331    nir->info.inputs_read = key->inputs_read;
1332    nir->info.patch_inputs_read = key->patch_inputs_read;
1333
1334    struct brw_vue_map input_vue_map;
1335    brw_compute_tess_vue_map(&input_vue_map,
1336                             nir->info.inputs_read & ~VARYING_BIT_PRIMITIVE_ID,
1337                             nir->info.patch_inputs_read);
1338
1339    nir = brw_nir_apply_sampler_key(nir, devinfo, &key->tex, is_scalar);
1340    brw_nir_lower_tes_inputs(nir, &input_vue_map);
1341    brw_nir_lower_vue_outputs(nir, is_scalar);
1342    nir = brw_postprocess_nir(nir, compiler->devinfo, is_scalar);
1343
1344    brw_compute_vue_map(devinfo, &prog_data->base.vue_map,
1345                        nir->info.outputs_written,
1346                        nir->info.separate_shader);
1347
1348    unsigned output_size_bytes = prog_data->base.vue_map.num_slots * 4 * 4;
1349
1350    assert(output_size_bytes >= 1);
1351    if (output_size_bytes > GEN7_MAX_DS_URB_ENTRY_SIZE_BYTES) {
1352       if (error_str)
1353          *error_str = ralloc_strdup(mem_ctx, "DS outputs exceed maximum size");
1354       return NULL;
1355    }
1356
1357    /* URB entry sizes are stored as a multiple of 64 bytes. */
1358    prog_data->base.urb_entry_size = ALIGN(output_size_bytes, 64) / 64;
1359
1360    bool need_patch_header = nir->info.system_values_read &
1361       (BITFIELD64_BIT(SYSTEM_VALUE_TESS_LEVEL_OUTER) |
1362        BITFIELD64_BIT(SYSTEM_VALUE_TESS_LEVEL_INNER));
1363
1364    /* The TES will pull most inputs using URB read messages.
1365     *
1366     * However, we push the patch header for TessLevel factors when required,
1367     * as it's a tiny amount of extra data.
1368     */
1369    prog_data->base.urb_read_length = need_patch_header ? 1 : 0;
1370
1371    if (unlikely(INTEL_DEBUG & DEBUG_TES)) {
1372       fprintf(stderr, "TES Input ");
1373       brw_print_vue_map(stderr, &input_vue_map);
1374       fprintf(stderr, "TES Output ");
1375       brw_print_vue_map(stderr, &prog_data->base.vue_map);
1376    }
1377
1378    if (is_scalar) {
1379       fs_visitor v(compiler, log_data, mem_ctx, (void *) key,
1380                    &prog_data->base.base, shader->Program, nir, 8,
1381                    shader_time_index, &input_vue_map);
1382       if (!v.run_tes()) {
1383          if (error_str)
1384             *error_str = ralloc_strdup(mem_ctx, v.fail_msg);
1385          return NULL;
1386       }
1387
1388       prog_data->base.base.dispatch_grf_start_reg = v.payload.num_regs;
1389       prog_data->base.dispatch_mode = DISPATCH_MODE_SIMD8;
1390
1391       fs_generator g(compiler, log_data, mem_ctx, (void *) key,
1392                      &prog_data->base.base, v.promoted_constants, false,
1393                      MESA_SHADER_TESS_EVAL);
1394       if (unlikely(INTEL_DEBUG & DEBUG_TES)) {
1395          g.enable_debug(ralloc_asprintf(mem_ctx,
1396                                         "%s tessellation evaluation shader %s",
1397                                         nir->info.label ? nir->info.label
1398                                                         : "unnamed",
1399                                         nir->info.name));
1400       }
1401
1402       g.generate_code(v.cfg, 8);
1403
1404       return g.get_assembly(final_assembly_size);
1405    } else {
1406       brw::vec4_tes_visitor v(compiler, log_data, key, prog_data,
1407                               nir, mem_ctx, shader_time_index);
1408       if (!v.run()) {
1409          if (error_str)
1410             *error_str = ralloc_strdup(mem_ctx, v.fail_msg);
1411          return NULL;
1412       }
1413
1414       if (unlikely(INTEL_DEBUG & DEBUG_TES))
1415          v.dump_instructions();
1416
1417       return brw_vec4_generate_assembly(compiler, log_data, mem_ctx, nir,
1418                                         &prog_data->base, v.cfg,
1419                                         final_assembly_size);
1420    }
1421 }