src/compiler/nir/nir_builder.h

   1 /*
   2  * Copyright © 2014-2015 Broadcom
   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 #ifndef NIR_BUILDER_H
  25 #define NIR_BUILDER_H
  26
  27 #include "nir_control_flow.h"
  28
  29 struct exec_list;
  30
  31 typedef struct nir_builder {
  32    nir_cursor cursor;
  33
  34    /* Whether new ALU instructions will be marked "exact" */
  35    bool exact;
  36
  37    nir_shader *shader;
  38    nir_function_impl *impl;
  39 } nir_builder;
  40
  41 static inline void
  42 nir_builder_init(nir_builder *build, nir_function_impl *impl)
  43 {
  44    memset(build, 0, sizeof(*build));
  45    build->exact = false;
  46    build->impl = impl;
  47    build->shader = impl->function->shader;
  48 }
  49
  50 static inline void
  51 nir_builder_init_simple_shader(nir_builder *build, void *mem_ctx,
  52                                gl_shader_stage stage,
  53                                const nir_shader_compiler_options *options)
  54 {
  55    build->shader = nir_shader_create(mem_ctx, stage, options, NULL);
  56    nir_function *func = nir_function_create(build->shader, "main");
  57    build->exact = false;
  58    build->impl = nir_function_impl_create(func);
  59    build->cursor = nir_after_cf_list(&build->impl->body);
  60 }
  61
  62 static inline void
  63 nir_builder_instr_insert(nir_builder *build, nir_instr *instr)
  64 {
  65    nir_instr_insert(build->cursor, instr);
  66
  67    /* Move the cursor forward. */
  68    build->cursor = nir_after_instr(instr);
  69 }
  70
  71 static inline nir_instr *
  72 nir_builder_last_instr(nir_builder *build)
  73 {
  74    assert(build->cursor.option == nir_cursor_after_instr);
  75    return build->cursor.instr;
  76 }
  77
  78 static inline void
  79 nir_builder_cf_insert(nir_builder *build, nir_cf_node *cf)
  80 {
  81    nir_cf_node_insert(build->cursor, cf);
  82 }
  83
  84 static inline bool
  85 nir_builder_is_inside_cf(nir_builder *build, nir_cf_node *cf_node)
  86 {
  87    nir_block *block = nir_cursor_current_block(build->cursor);
  88    for (nir_cf_node *n = &block->cf_node; n; n = n->parent) {
  89       if (n == cf_node)
  90          return true;
  91    }
  92    return false;
  93 }
  94
  95 static inline nir_if *
  96 nir_push_if(nir_builder *build, nir_ssa_def *condition)
  97 {
  98    nir_if *nif = nir_if_create(build->shader);
  99    nif->condition = nir_src_for_ssa(condition);
 100    nir_builder_cf_insert(build, &nif->cf_node);
 101    build->cursor = nir_before_cf_list(&nif->then_list);
 102    return nif;
 103 }
 104
 105 static inline nir_if *
 106 nir_push_else(nir_builder *build, nir_if *nif)
 107 {
 108    if (nif) {
 109       assert(nir_builder_is_inside_cf(build, &nif->cf_node));
 110    } else {
 111       nir_block *block = nir_cursor_current_block(build->cursor);
 112       nif = nir_cf_node_as_if(block->cf_node.parent);
 113    }
 114    build->cursor = nir_before_cf_list(&nif->else_list);
 115    return nif;
 116 }
 117
 118 static inline void
 119 nir_pop_if(nir_builder *build, nir_if *nif)
 120 {
 121    if (nif) {
 122       assert(nir_builder_is_inside_cf(build, &nif->cf_node));
 123    } else {
 124       nir_block *block = nir_cursor_current_block(build->cursor);
 125       nif = nir_cf_node_as_if(block->cf_node.parent);
 126    }
 127    build->cursor = nir_after_cf_node(&nif->cf_node);
 128 }
 129
 130 static inline nir_ssa_def *
 131 nir_if_phi(nir_builder *build, nir_ssa_def *then_def, nir_ssa_def *else_def)
 132 {
 133    nir_block *block = nir_cursor_current_block(build->cursor);
 134    nir_if *nif = nir_cf_node_as_if(nir_cf_node_prev(&block->cf_node));
 135
 136    nir_phi_instr *phi = nir_phi_instr_create(build->shader);
 137
 138    nir_phi_src *src = ralloc(phi, nir_phi_src);
 139    src->pred = nir_if_last_then_block(nif);
 140    src->src = nir_src_for_ssa(then_def);
 141    exec_list_push_tail(&phi->srcs, &src->node);
 142
 143    src = ralloc(phi, nir_phi_src);
 144    src->pred = nir_if_last_else_block(nif);
 145    src->src = nir_src_for_ssa(else_def);
 146    exec_list_push_tail(&phi->srcs, &src->node);
 147
 148    assert(then_def->num_components == else_def->num_components);
 149    assert(then_def->bit_size == else_def->bit_size);
 150    nir_ssa_dest_init(&phi->instr, &phi->dest,
 151                      then_def->num_components, then_def->bit_size, NULL);
 152
 153    nir_builder_instr_insert(build, &phi->instr);
 154
 155    return &phi->dest.ssa;
 156 }
 157
 158 static inline nir_loop *
 159 nir_push_loop(nir_builder *build)
 160 {
 161    nir_loop *loop = nir_loop_create(build->shader);
 162    nir_builder_cf_insert(build, &loop->cf_node);
 163    build->cursor = nir_before_cf_list(&loop->body);
 164    return loop;
 165 }
 166
 167 static inline void
 168 nir_pop_loop(nir_builder *build, nir_loop *loop)
 169 {
 170    if (loop) {
 171       assert(nir_builder_is_inside_cf(build, &loop->cf_node));
 172    } else {
 173       nir_block *block = nir_cursor_current_block(build->cursor);
 174       loop = nir_cf_node_as_loop(block->cf_node.parent);
 175    }
 176    build->cursor = nir_after_cf_node(&loop->cf_node);
 177 }
 178
 179 static inline nir_ssa_def *
 180 nir_ssa_undef(nir_builder *build, unsigned num_components, unsigned bit_size)
 181 {
 182    nir_ssa_undef_instr *undef =
 183       nir_ssa_undef_instr_create(build->shader, num_components, bit_size);
 184    if (!undef)
 185       return NULL;
 186
 187    nir_instr_insert(nir_before_cf_list(&build->impl->body), &undef->instr);
 188
 189    return &undef->def;
 190 }
 191
 192 static inline nir_ssa_def *
 193 nir_build_imm(nir_builder *build, unsigned num_components,
 194               unsigned bit_size, nir_const_value value)
 195 {
 196    nir_load_const_instr *load_const =
 197       nir_load_const_instr_create(build->shader, num_components, bit_size);
 198    if (!load_const)
 199       return NULL;
 200
 201    load_const->value = value;
 202
 203    nir_builder_instr_insert(build, &load_const->instr);
 204
 205    return &load_const->def;
 206 }
 207
 208 static inline nir_ssa_def *
 209 nir_imm_float(nir_builder *build, float x)
 210 {
 211    nir_const_value v;
 212
 213    memset(&v, 0, sizeof(v));
 214    v.f32[0] = x;
 215
 216    return nir_build_imm(build, 1, 32, v);
 217 }
 218
 219 static inline nir_ssa_def *
 220 nir_imm_double(nir_builder *build, double x)
 221 {
 222    nir_const_value v;
 223
 224    memset(&v, 0, sizeof(v));
 225    v.f64[0] = x;
 226
 227    return nir_build_imm(build, 1, 64, v);
 228 }
 229
 230 static inline nir_ssa_def *
 231 nir_imm_vec4(nir_builder *build, float x, float y, float z, float w)
 232 {
 233    nir_const_value v;
 234
 235    memset(&v, 0, sizeof(v));
 236    v.f32[0] = x;
 237    v.f32[1] = y;
 238    v.f32[2] = z;
 239    v.f32[3] = w;
 240
 241    return nir_build_imm(build, 4, 32, v);
 242 }
 243
 244 static inline nir_ssa_def *
 245 nir_imm_int(nir_builder *build, int x)
 246 {
 247    nir_const_value v;
 248
 249    memset(&v, 0, sizeof(v));
 250    v.i32[0] = x;
 251
 252    return nir_build_imm(build, 1, 32, v);
 253 }
 254
 255 static inline nir_ssa_def *
 256 nir_imm_ivec4(nir_builder *build, int x, int y, int z, int w)
 257 {
 258    nir_const_value v;
 259
 260    memset(&v, 0, sizeof(v));
 261    v.i32[0] = x;
 262    v.i32[1] = y;
 263    v.i32[2] = z;
 264    v.i32[3] = w;
 265
 266    return nir_build_imm(build, 4, 32, v);
 267 }
 268
 269 static inline nir_ssa_def *
 270 nir_build_alu(nir_builder *build, nir_op op, nir_ssa_def *src0,
 271               nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3)
 272 {
 273    const nir_op_info *op_info = &nir_op_infos[op];
 274    nir_alu_instr *instr = nir_alu_instr_create(build->shader, op);
 275    if (!instr)
 276       return NULL;
 277
 278    instr->exact = build->exact;
 279
 280    instr->src[0].src = nir_src_for_ssa(src0);
 281    if (src1)
 282       instr->src[1].src = nir_src_for_ssa(src1);
 283    if (src2)
 284       instr->src[2].src = nir_src_for_ssa(src2);
 285    if (src3)
 286       instr->src[3].src = nir_src_for_ssa(src3);
 287
 288    /* Guess the number of components the destination temporary should have
 289     * based on our input sizes, if it's not fixed for the op.
 290     */
 291    unsigned num_components = op_info->output_size;
 292    if (num_components == 0) {
 293       for (unsigned i = 0; i < op_info->num_inputs; i++) {
 294          if (op_info->input_sizes[i] == 0)
 295             num_components = MAX2(num_components,
 296                                   instr->src[i].src.ssa->num_components);
 297       }
 298    }
 299    assert(num_components != 0);
 300
 301    /* Figure out the bitwidth based on the source bitwidth if the instruction
 302     * is variable-width.
 303     */
 304    unsigned bit_size = nir_alu_type_get_type_size(op_info->output_type);
 305    if (bit_size == 0) {
 306       for (unsigned i = 0; i < op_info->num_inputs; i++) {
 307          unsigned src_bit_size = instr->src[i].src.ssa->bit_size;
 308          if (nir_alu_type_get_type_size(op_info->input_types[i]) == 0) {
 309             if (bit_size)
 310                assert(src_bit_size == bit_size);
 311             else
 312                bit_size = src_bit_size;
 313          } else {
 314             assert(src_bit_size ==
 315                nir_alu_type_get_type_size(op_info->input_types[i]));
 316          }
 317       }
 318    }
 319
 320    /* Make sure we don't swizzle from outside of our source vector (like if a
 321     * scalar value was passed into a multiply with a vector).
 322     */
 323    for (unsigned i = 0; i < op_info->num_inputs; i++) {
 324       for (unsigned j = instr->src[i].src.ssa->num_components; j < 4; j++) {
 325          instr->src[i].swizzle[j] = instr->src[i].src.ssa->num_components - 1;
 326       }
 327    }
 328
 329    nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components,
 330                      bit_size, NULL);
 331    instr->dest.write_mask = (1 << num_components) - 1;
 332
 333    nir_builder_instr_insert(build, &instr->instr);
 334
 335    return &instr->dest.dest.ssa;
 336 }
 337
 338 #include "nir_builder_opcodes.h"
 339
 340 static inline nir_ssa_def *
 341 nir_vec(nir_builder *build, nir_ssa_def **comp, unsigned num_components)
 342 {
 343    switch (num_components) {
 344    case 4:
 345       return nir_vec4(build, comp[0], comp[1], comp[2], comp[3]);
 346    case 3:
 347       return nir_vec3(build, comp[0], comp[1], comp[2]);
 348    case 2:
 349       return nir_vec2(build, comp[0], comp[1]);
 350    case 1:
 351       return comp[0];
 352    default:
 353       unreachable("bad component count");
 354       return NULL;
 355    }
 356 }
 357
 358 /**
 359  * Similar to nir_fmov, but takes a nir_alu_src instead of a nir_ssa_def.
 360  */
 361 static inline nir_ssa_def *
 362 nir_fmov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
 363 {
 364    nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_fmov);
 365    nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components,
 366                      nir_src_bit_size(src.src), NULL);
 367    mov->exact = build->exact;
 368    mov->dest.write_mask = (1 << num_components) - 1;
 369    mov->src[0] = src;
 370    nir_builder_instr_insert(build, &mov->instr);
 371
 372    return &mov->dest.dest.ssa;
 373 }
 374
 375 static inline nir_ssa_def *
 376 nir_imov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
 377 {
 378    nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_imov);
 379    nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components,
 380                      nir_src_bit_size(src.src), NULL);
 381    mov->exact = build->exact;
 382    mov->dest.write_mask = (1 << num_components) - 1;
 383    mov->src[0] = src;
 384    nir_builder_instr_insert(build, &mov->instr);
 385
 386    return &mov->dest.dest.ssa;
 387 }
 388
 389 /**
 390  * Construct an fmov or imov that reswizzles the source's components.
 391  */
 392 static inline nir_ssa_def *
 393 nir_swizzle(nir_builder *build, nir_ssa_def *src, const unsigned swiz[4],
 394             unsigned num_components, bool use_fmov)
 395 {
 396    nir_alu_src alu_src = { NIR_SRC_INIT };
 397    alu_src.src = nir_src_for_ssa(src);
 398    for (unsigned i = 0; i < num_components; i++)
 399       alu_src.swizzle[i] = swiz[i];
 400
 401    return use_fmov ? nir_fmov_alu(build, alu_src, num_components) :
 402                      nir_imov_alu(build, alu_src, num_components);
 403 }
 404
 405 /* Selects the right fdot given the number of components in each source. */
 406 static inline nir_ssa_def *
 407 nir_fdot(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1)
 408 {
 409    assert(src0->num_components == src1->num_components);
 410    switch (src0->num_components) {
 411    case 1: return nir_fmul(build, src0, src1);
 412    case 2: return nir_fdot2(build, src0, src1);
 413    case 3: return nir_fdot3(build, src0, src1);
 414    case 4: return nir_fdot4(build, src0, src1);
 415    default:
 416       unreachable("bad component size");
 417    }
 418
 419    return NULL;
 420 }
 421
 422 static inline nir_ssa_def *
 423 nir_bany_inequal(nir_builder *b, nir_ssa_def *src0, nir_ssa_def *src1)
 424 {
 425    switch (src0->num_components) {
 426    case 1: return nir_ine(b, src0, src1);
 427    case 2: return nir_bany_inequal2(b, src0, src1);
 428    case 3: return nir_bany_inequal3(b, src0, src1);
 429    case 4: return nir_bany_inequal4(b, src0, src1);
 430    default:
 431       unreachable("bad component size");
 432    }
 433 }
 434
 435 static inline nir_ssa_def *
 436 nir_bany(nir_builder *b, nir_ssa_def *src)
 437 {
 438    return nir_bany_inequal(b, src, nir_imm_int(b, 0));
 439 }
 440
 441 static inline nir_ssa_def *
 442 nir_channel(nir_builder *b, nir_ssa_def *def, unsigned c)
 443 {
 444    unsigned swizzle[4] = {c, c, c, c};
 445    return nir_swizzle(b, def, swizzle, 1, false);
 446 }
 447
 448 static inline nir_ssa_def *
 449 nir_channels(nir_builder *b, nir_ssa_def *def, unsigned mask)
 450 {
 451    unsigned num_channels = 0, swizzle[4] = { 0, 0, 0, 0 };
 452
 453    for (unsigned i = 0; i < 4; i++) {
 454       if ((mask & (1 << i)) == 0)
 455          continue;
 456       swizzle[num_channels++] = i;
 457    }
 458
 459    return nir_swizzle(b, def, swizzle, num_channels, false);
 460 }
 461
 462 /**
 463  * Turns a nir_src into a nir_ssa_def * so it can be passed to
 464  * nir_build_alu()-based builder calls.
 465  *
 466  * See nir_ssa_for_alu_src() for alu instructions.
 467  */
 468 static inline nir_ssa_def *
 469 nir_ssa_for_src(nir_builder *build, nir_src src, int num_components)
 470 {
 471    if (src.is_ssa && src.ssa->num_components == num_components)
 472       return src.ssa;
 473
 474    nir_alu_src alu = { NIR_SRC_INIT };
 475    alu.src = src;
 476    for (int j = 0; j < 4; j++)
 477       alu.swizzle[j] = j;
 478
 479    return nir_imov_alu(build, alu, num_components);
 480 }
 481
 482 /**
 483  * Similar to nir_ssa_for_src(), but for alu src's, respecting the
 484  * nir_alu_src's swizzle.
 485  */
 486 static inline nir_ssa_def *
 487 nir_ssa_for_alu_src(nir_builder *build, nir_alu_instr *instr, unsigned srcn)
 488 {
 489    static uint8_t trivial_swizzle[4] = { 0, 1, 2, 3 };
 490    nir_alu_src *src = &instr->src[srcn];
 491    unsigned num_components = nir_ssa_alu_instr_src_components(instr, srcn);
 492
 493    if (src->src.is_ssa && (src->src.ssa->num_components == num_components) &&
 494        !src->abs && !src->negate &&
 495        (memcmp(src->swizzle, trivial_swizzle, num_components) == 0))
 496       return src->src.ssa;
 497
 498    return nir_imov_alu(build, *src, num_components);
 499 }
 500
 501 static inline nir_ssa_def *
 502 nir_load_var(nir_builder *build, nir_variable *var)
 503 {
 504    const unsigned num_components = glsl_get_vector_elements(var->type);
 505
 506    nir_intrinsic_instr *load =
 507       nir_intrinsic_instr_create(build->shader, nir_intrinsic_load_var);
 508    load->num_components = num_components;
 509    load->variables[0] = nir_deref_var_create(load, var);
 510    nir_ssa_dest_init(&load->instr, &load->dest, num_components,
 511                      glsl_get_bit_size(var->type), NULL);
 512    nir_builder_instr_insert(build, &load->instr);
 513    return &load->dest.ssa;
 514 }
 515
 516 static inline nir_ssa_def *
 517 nir_load_deref_var(nir_builder *build, nir_deref_var *deref)
 518 {
 519    const struct glsl_type *type = nir_deref_tail(&deref->deref)->type;
 520    const unsigned num_components = glsl_get_vector_elements(type);
 521
 522    nir_intrinsic_instr *load =
 523       nir_intrinsic_instr_create(build->shader, nir_intrinsic_load_var);
 524    load->num_components = num_components;
 525    load->variables[0] = nir_deref_var_clone(deref, load);
 526    nir_ssa_dest_init(&load->instr, &load->dest, num_components,
 527                      glsl_get_bit_size(type), NULL);
 528    nir_builder_instr_insert(build, &load->instr);
 529    return &load->dest.ssa;
 530 }
 531
 532 static inline void
 533 nir_store_var(nir_builder *build, nir_variable *var, nir_ssa_def *value,
 534               unsigned writemask)
 535 {
 536    const unsigned num_components = glsl_get_vector_elements(var->type);
 537
 538    nir_intrinsic_instr *store =
 539       nir_intrinsic_instr_create(build->shader, nir_intrinsic_store_var);
 540    store->num_components = num_components;
 541    nir_intrinsic_set_write_mask(store, writemask);
 542    store->variables[0] = nir_deref_var_create(store, var);
 543    store->src[0] = nir_src_for_ssa(value);
 544    nir_builder_instr_insert(build, &store->instr);
 545 }
 546
 547 static inline void
 548 nir_store_deref_var(nir_builder *build, nir_deref_var *deref,
 549                     nir_ssa_def *value, unsigned writemask)
 550 {
 551    const unsigned num_components =
 552       glsl_get_vector_elements(nir_deref_tail(&deref->deref)->type);
 553
 554    nir_intrinsic_instr *store =
 555       nir_intrinsic_instr_create(build->shader, nir_intrinsic_store_var);
 556    store->num_components = num_components;
 557    store->const_index[0] = writemask & ((1 << num_components) - 1);
 558    store->variables[0] = nir_deref_var_clone(deref, store);
 559    store->src[0] = nir_src_for_ssa(value);
 560    nir_builder_instr_insert(build, &store->instr);
 561 }
 562
 563 static inline void
 564 nir_copy_deref_var(nir_builder *build, nir_deref_var *dest, nir_deref_var *src)
 565 {
 566    assert(nir_deref_tail(&dest->deref)->type ==
 567           nir_deref_tail(&src->deref)->type);
 568
 569    nir_intrinsic_instr *copy =
 570       nir_intrinsic_instr_create(build->shader, nir_intrinsic_copy_var);
 571    copy->variables[0] = nir_deref_var_clone(dest, copy);
 572    copy->variables[1] = nir_deref_var_clone(src, copy);
 573    nir_builder_instr_insert(build, &copy->instr);
 574 }
 575
 576 static inline void
 577 nir_copy_var(nir_builder *build, nir_variable *dest, nir_variable *src)
 578 {
 579    nir_intrinsic_instr *copy =
 580       nir_intrinsic_instr_create(build->shader, nir_intrinsic_copy_var);
 581    copy->variables[0] = nir_deref_var_create(copy, dest);
 582    copy->variables[1] = nir_deref_var_create(copy, src);
 583    nir_builder_instr_insert(build, &copy->instr);
 584 }
 585
 586 /* Generic builder for system values. */
 587 static inline nir_ssa_def *
 588 nir_load_system_value(nir_builder *build, nir_intrinsic_op op, int index)
 589 {
 590    nir_intrinsic_instr *load = nir_intrinsic_instr_create(build->shader, op);
 591    load->num_components = nir_intrinsic_infos[op].dest_components;
 592    load->const_index[0] = index;
 593    nir_ssa_dest_init(&load->instr, &load->dest,
 594                      nir_intrinsic_infos[op].dest_components, 32, NULL);
 595    nir_builder_instr_insert(build, &load->instr);
 596    return &load->dest.ssa;
 597 }
 598
 599 /* Generate custom builders for system values. */
 600 #define INTRINSIC(name, num_srcs, src_components, has_dest, dest_components, \
 601                   num_variables, num_indices, idx0, idx1, idx2, flags)
 602 #define LAST_INTRINSIC(name)
 603
 604 #define DEFINE_SYSTEM_VALUE(name)                                        \
 605    static inline nir_ssa_def *                                           \
 606    nir_load_##name(nir_builder *build)                                   \
 607    {                                                                     \
 608       return nir_load_system_value(build, nir_intrinsic_load_##name, 0); \
 609    }                                                                     \
 610
 611 #include "nir_intrinsics.h"
 612
 613 static inline nir_ssa_def *
 614 nir_load_barycentric(nir_builder *build, nir_intrinsic_op op,
 615                      unsigned interp_mode)
 616 {
 617    nir_intrinsic_instr *bary = nir_intrinsic_instr_create(build->shader, op);
 618    nir_ssa_dest_init(&bary->instr, &bary->dest, 2, 32, NULL);
 619    nir_intrinsic_set_interp_mode(bary, interp_mode);
 620    nir_builder_instr_insert(build, &bary->instr);
 621    return &bary->dest.ssa;
 622 }
 623
 624 static inline void
 625 nir_jump(nir_builder *build, nir_jump_type jump_type)
 626 {
 627    nir_jump_instr *jump = nir_jump_instr_create(build->shader, jump_type);
 628    nir_builder_instr_insert(build, &jump->instr);
 629 }
 630
 631 #endif /* NIR_BUILDER_H */