src/amd/common/ac_llvm_build.c

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sub license, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * The above copyright notice and this permission notice (including the
  21  * next paragraph) shall be included in all copies or substantial portions
  22  * of the Software.
  23  *
  24  */
  25 /* based on pieces from si_pipe.c and radeon_llvm_emit.c */
  26 #include "ac_llvm_build.h"
  27
  28 #include <llvm-c/Core.h>
  29
  30 #include "c11/threads.h"
  31
  32 #include <assert.h>
  33 #include <stdio.h>
  34
  35 #include "ac_llvm_util.h"
  36
  37 #include "util/bitscan.h"
  38 #include "util/macros.h"
  39 #include "sid.h"
  40
  41 /* Initialize module-independent parts of the context.
  42  *
  43  * The caller is responsible for initializing ctx::module and ctx::builder.
  44  */
  45 void
  46 ac_llvm_context_init(struct ac_llvm_context *ctx, LLVMContextRef context)
  47 {
  48         LLVMValueRef args[1];
  49
  50         ctx->context = context;
  51         ctx->module = NULL;
  52         ctx->builder = NULL;
  53
  54         ctx->voidt = LLVMVoidTypeInContext(ctx->context);
  55         ctx->i1 = LLVMInt1TypeInContext(ctx->context);
  56         ctx->i8 = LLVMInt8TypeInContext(ctx->context);
  57         ctx->i32 = LLVMIntTypeInContext(ctx->context, 32);
  58         ctx->f32 = LLVMFloatTypeInContext(ctx->context);
  59         ctx->v4i32 = LLVMVectorType(ctx->i32, 4);
  60         ctx->v4f32 = LLVMVectorType(ctx->f32, 4);
  61         ctx->v16i8 = LLVMVectorType(ctx->i8, 16);
  62
  63         ctx->range_md_kind = LLVMGetMDKindIDInContext(ctx->context,
  64                                                      "range", 5);
  65
  66         ctx->invariant_load_md_kind = LLVMGetMDKindIDInContext(ctx->context,
  67                                                                "invariant.load", 14);
  68
  69         ctx->fpmath_md_kind = LLVMGetMDKindIDInContext(ctx->context, "fpmath", 6);
  70
  71         args[0] = LLVMConstReal(ctx->f32, 2.5);
  72         ctx->fpmath_md_2p5_ulp = LLVMMDNodeInContext(ctx->context, args, 1);
  73
  74         ctx->uniform_md_kind = LLVMGetMDKindIDInContext(ctx->context,
  75                                                         "amdgpu.uniform", 14);
  76
  77         ctx->empty_md = LLVMMDNodeInContext(ctx->context, NULL, 0);
  78 }
  79
  80 LLVMValueRef
  81 ac_emit_llvm_intrinsic(struct ac_llvm_context *ctx, const char *name,
  82                        LLVMTypeRef return_type, LLVMValueRef *params,
  83                        unsigned param_count, unsigned attrib_mask)
  84 {
  85         LLVMValueRef function, call;
  86         bool set_callsite_attrs = HAVE_LLVM >= 0x0400 &&
  87                                   !(attrib_mask & AC_FUNC_ATTR_LEGACY);
  88
  89         function = LLVMGetNamedFunction(ctx->module, name);
  90         if (!function) {
  91                 LLVMTypeRef param_types[32], function_type;
  92                 unsigned i;
  93
  94                 assert(param_count <= 32);
  95
  96                 for (i = 0; i < param_count; ++i) {
  97                         assert(params[i]);
  98                         param_types[i] = LLVMTypeOf(params[i]);
  99                 }
 100                 function_type =
 101                     LLVMFunctionType(return_type, param_types, param_count, 0);
 102                 function = LLVMAddFunction(ctx->module, name, function_type);
 103
 104                 LLVMSetFunctionCallConv(function, LLVMCCallConv);
 105                 LLVMSetLinkage(function, LLVMExternalLinkage);
 106
 107                 if (!set_callsite_attrs)
 108                         ac_add_func_attributes(ctx->context, function, attrib_mask);
 109         }
 110
 111         call = LLVMBuildCall(ctx->builder, function, params, param_count, "");
 112         if (set_callsite_attrs)
 113                 ac_add_func_attributes(ctx->context, call, attrib_mask);
 114         return call;
 115 }
 116
 117 static LLVMValueRef bitcast_to_float(struct ac_llvm_context *ctx,
 118                                      LLVMValueRef value)
 119 {
 120         LLVMTypeRef type = LLVMTypeOf(value);
 121         LLVMTypeRef new_type;
 122
 123         if (LLVMGetTypeKind(type) == LLVMVectorTypeKind)
 124                 new_type = LLVMVectorType(ctx->f32, LLVMGetVectorSize(type));
 125         else
 126                 new_type = ctx->f32;
 127
 128         return LLVMBuildBitCast(ctx->builder, value, new_type, "");
 129 }
 130
 131 /**
 132  * Given the i32 or vNi32 \p type, generate the textual name (e.g. for use with
 133  * intrinsic names).
 134  */
 135 void ac_build_type_name_for_intr(LLVMTypeRef type, char *buf, unsigned bufsize)
 136 {
 137         LLVMTypeRef elem_type = type;
 138
 139         assert(bufsize >= 8);
 140
 141         if (LLVMGetTypeKind(type) == LLVMVectorTypeKind) {
 142                 int ret = snprintf(buf, bufsize, "v%u",
 143                                         LLVMGetVectorSize(type));
 144                 if (ret < 0) {
 145                         char *type_name = LLVMPrintTypeToString(type);
 146                         fprintf(stderr, "Error building type name for: %s\n",
 147                                 type_name);
 148                         return;
 149                 }
 150                 elem_type = LLVMGetElementType(type);
 151                 buf += ret;
 152                 bufsize -= ret;
 153         }
 154         switch (LLVMGetTypeKind(elem_type)) {
 155         default: break;
 156         case LLVMIntegerTypeKind:
 157                 snprintf(buf, bufsize, "i%d", LLVMGetIntTypeWidth(elem_type));
 158                 break;
 159         case LLVMFloatTypeKind:
 160                 snprintf(buf, bufsize, "f32");
 161                 break;
 162         case LLVMDoubleTypeKind:
 163                 snprintf(buf, bufsize, "f64");
 164                 break;
 165         }
 166 }
 167
 168 LLVMValueRef
 169 ac_build_gather_values_extended(struct ac_llvm_context *ctx,
 170                                 LLVMValueRef *values,
 171                                 unsigned value_count,
 172                                 unsigned value_stride,
 173                                 bool load)
 174 {
 175         LLVMBuilderRef builder = ctx->builder;
 176         LLVMValueRef vec = NULL;
 177         unsigned i;
 178
 179         if (value_count == 1) {
 180                 if (load)
 181                         return LLVMBuildLoad(builder, values[0], "");
 182                 return values[0];
 183         } else if (!value_count)
 184                 unreachable("value_count is 0");
 185
 186         for (i = 0; i < value_count; i++) {
 187                 LLVMValueRef value = values[i * value_stride];
 188                 if (load)
 189                         value = LLVMBuildLoad(builder, value, "");
 190
 191                 if (!i)
 192                         vec = LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value), value_count));
 193                 LLVMValueRef index = LLVMConstInt(ctx->i32, i, false);
 194                 vec = LLVMBuildInsertElement(builder, vec, value, index, "");
 195         }
 196         return vec;
 197 }
 198
 199 LLVMValueRef
 200 ac_build_gather_values(struct ac_llvm_context *ctx,
 201                        LLVMValueRef *values,
 202                        unsigned value_count)
 203 {
 204         return ac_build_gather_values_extended(ctx, values, value_count, 1, false);
 205 }
 206
 207 LLVMValueRef
 208 ac_emit_fdiv(struct ac_llvm_context *ctx,
 209              LLVMValueRef num,
 210              LLVMValueRef den)
 211 {
 212         LLVMValueRef ret = LLVMBuildFDiv(ctx->builder, num, den, "");
 213
 214         if (!LLVMIsConstant(ret))
 215                 LLVMSetMetadata(ret, ctx->fpmath_md_kind, ctx->fpmath_md_2p5_ulp);
 216         return ret;
 217 }
 218
 219 /* Coordinates for cube map selection. sc, tc, and ma are as in Table 8.27
 220  * of the OpenGL 4.5 (Compatibility Profile) specification, except ma is
 221  * already multiplied by two. id is the cube face number.
 222  */
 223 struct cube_selection_coords {
 224         LLVMValueRef stc[2];
 225         LLVMValueRef ma;
 226         LLVMValueRef id;
 227 };
 228
 229 static void
 230 build_cube_intrinsic(struct ac_llvm_context *ctx,
 231                      LLVMValueRef in[3],
 232                      struct cube_selection_coords *out)
 233 {
 234         LLVMBuilderRef builder = ctx->builder;
 235
 236         if (HAVE_LLVM >= 0x0309) {
 237                 LLVMTypeRef f32 = ctx->f32;
 238
 239                 out->stc[1] = ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.cubetc",
 240                                         f32, in, 3, AC_FUNC_ATTR_READNONE);
 241                 out->stc[0] = ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.cubesc",
 242                                         f32, in, 3, AC_FUNC_ATTR_READNONE);
 243                 out->ma = ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.cubema",
 244                                         f32, in, 3, AC_FUNC_ATTR_READNONE);
 245                 out->id = ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.cubeid",
 246                                         f32, in, 3, AC_FUNC_ATTR_READNONE);
 247         } else {
 248                 LLVMValueRef c[4] = {
 249                         in[0],
 250                         in[1],
 251                         in[2],
 252                         LLVMGetUndef(LLVMTypeOf(in[0]))
 253                 };
 254                 LLVMValueRef vec = ac_build_gather_values(ctx, c, 4);
 255
 256                 LLVMValueRef tmp =
 257                         ac_emit_llvm_intrinsic(ctx, "llvm.AMDGPU.cube",
 258                                           LLVMTypeOf(vec), &vec, 1,
 259                                           AC_FUNC_ATTR_READNONE);
 260
 261                 out->stc[1] = LLVMBuildExtractElement(builder, tmp,
 262                                 LLVMConstInt(ctx->i32, 0, 0), "");
 263                 out->stc[0] = LLVMBuildExtractElement(builder, tmp,
 264                                 LLVMConstInt(ctx->i32, 1, 0), "");
 265                 out->ma = LLVMBuildExtractElement(builder, tmp,
 266                                 LLVMConstInt(ctx->i32, 2, 0), "");
 267                 out->id = LLVMBuildExtractElement(builder, tmp,
 268                                 LLVMConstInt(ctx->i32, 3, 0), "");
 269         }
 270 }
 271
 272 /**
 273  * Build a manual selection sequence for cube face sc/tc coordinates and
 274  * major axis vector (multiplied by 2 for consistency) for the given
 275  * vec3 \p coords, for the face implied by \p selcoords.
 276  *
 277  * For the major axis, we always adjust the sign to be in the direction of
 278  * selcoords.ma; i.e., a positive out_ma means that coords is pointed towards
 279  * the selcoords major axis.
 280  */
 281 static void build_cube_select(LLVMBuilderRef builder,
 282                               const struct cube_selection_coords *selcoords,
 283                               const LLVMValueRef *coords,
 284                               LLVMValueRef *out_st,
 285                               LLVMValueRef *out_ma)
 286 {
 287         LLVMTypeRef f32 = LLVMTypeOf(coords[0]);
 288         LLVMValueRef is_ma_positive;
 289         LLVMValueRef sgn_ma;
 290         LLVMValueRef is_ma_z, is_not_ma_z;
 291         LLVMValueRef is_ma_y;
 292         LLVMValueRef is_ma_x;
 293         LLVMValueRef sgn;
 294         LLVMValueRef tmp;
 295
 296         is_ma_positive = LLVMBuildFCmp(builder, LLVMRealUGE,
 297                 selcoords->ma, LLVMConstReal(f32, 0.0), "");
 298         sgn_ma = LLVMBuildSelect(builder, is_ma_positive,
 299                 LLVMConstReal(f32, 1.0), LLVMConstReal(f32, -1.0), "");
 300
 301         is_ma_z = LLVMBuildFCmp(builder, LLVMRealUGE, selcoords->id, LLVMConstReal(f32, 4.0), "");
 302         is_not_ma_z = LLVMBuildNot(builder, is_ma_z, "");
 303         is_ma_y = LLVMBuildAnd(builder, is_not_ma_z,
 304                 LLVMBuildFCmp(builder, LLVMRealUGE, selcoords->id, LLVMConstReal(f32, 2.0), ""), "");
 305         is_ma_x = LLVMBuildAnd(builder, is_not_ma_z, LLVMBuildNot(builder, is_ma_y, ""), "");
 306
 307         /* Select sc */
 308         tmp = LLVMBuildSelect(builder, is_ma_z, coords[2], coords[0], "");
 309         sgn = LLVMBuildSelect(builder, is_ma_y, LLVMConstReal(f32, 1.0),
 310                 LLVMBuildSelect(builder, is_ma_x, sgn_ma,
 311                         LLVMBuildFNeg(builder, sgn_ma, ""), ""), "");
 312         out_st[0] = LLVMBuildFMul(builder, tmp, sgn, "");
 313
 314         /* Select tc */
 315         tmp = LLVMBuildSelect(builder, is_ma_y, coords[2], coords[1], "");
 316         sgn = LLVMBuildSelect(builder, is_ma_y, LLVMBuildFNeg(builder, sgn_ma, ""),
 317                 LLVMConstReal(f32, -1.0), "");
 318         out_st[1] = LLVMBuildFMul(builder, tmp, sgn, "");
 319
 320         /* Select ma */
 321         tmp = LLVMBuildSelect(builder, is_ma_z, coords[2],
 322                 LLVMBuildSelect(builder, is_ma_y, coords[1], coords[0], ""), "");
 323         sgn = LLVMBuildSelect(builder, is_ma_positive,
 324                 LLVMConstReal(f32, 2.0), LLVMConstReal(f32, -2.0), "");
 325         *out_ma = LLVMBuildFMul(builder, tmp, sgn, "");
 326 }
 327
 328 void
 329 ac_prepare_cube_coords(struct ac_llvm_context *ctx,
 330                        bool is_deriv, bool is_array,
 331                        LLVMValueRef *coords_arg,
 332                        LLVMValueRef *derivs_arg)
 333 {
 334
 335         LLVMBuilderRef builder = ctx->builder;
 336         struct cube_selection_coords selcoords;
 337         LLVMValueRef coords[3];
 338         LLVMValueRef invma;
 339
 340         build_cube_intrinsic(ctx, coords_arg, &selcoords);
 341
 342         invma = ac_emit_llvm_intrinsic(ctx, "llvm.fabs.f32",
 343                         ctx->f32, &selcoords.ma, 1, AC_FUNC_ATTR_READNONE);
 344         invma = ac_emit_fdiv(ctx, LLVMConstReal(ctx->f32, 1.0), invma);
 345
 346         for (int i = 0; i < 2; ++i)
 347                 coords[i] = LLVMBuildFMul(builder, selcoords.stc[i], invma, "");
 348
 349         coords[2] = selcoords.id;
 350
 351         if (is_deriv && derivs_arg) {
 352                 LLVMValueRef derivs[4];
 353                 int axis;
 354
 355                 /* Convert cube derivatives to 2D derivatives. */
 356                 for (axis = 0; axis < 2; axis++) {
 357                         LLVMValueRef deriv_st[2];
 358                         LLVMValueRef deriv_ma;
 359
 360                         /* Transform the derivative alongside the texture
 361                          * coordinate. Mathematically, the correct formula is
 362                          * as follows. Assume we're projecting onto the +Z face
 363                          * and denote by dx/dh the derivative of the (original)
 364                          * X texture coordinate with respect to horizontal
 365                          * window coordinates. The projection onto the +Z face
 366                          * plane is:
 367                          *
 368                          *   f(x,z) = x/z
 369                          *
 370                          * Then df/dh = df/dx * dx/dh + df/dz * dz/dh
 371                          *            = 1/z * dx/dh - x/z * 1/z * dz/dh.
 372                          *
 373                          * This motivatives the implementation below.
 374                          *
 375                          * Whether this actually gives the expected results for
 376                          * apps that might feed in derivatives obtained via
 377                          * finite differences is anyone's guess. The OpenGL spec
 378                          * seems awfully quiet about how textureGrad for cube
 379                          * maps should be handled.
 380                          */
 381                         build_cube_select(builder, &selcoords, &derivs_arg[axis * 3],
 382                                           deriv_st, &deriv_ma);
 383
 384                         deriv_ma = LLVMBuildFMul(builder, deriv_ma, invma, "");
 385
 386                         for (int i = 0; i < 2; ++i)
 387                                 derivs[axis * 2 + i] =
 388                                         LLVMBuildFSub(builder,
 389                                                 LLVMBuildFMul(builder, deriv_st[i], invma, ""),
 390                                                 LLVMBuildFMul(builder, deriv_ma, coords[i], ""), "");
 391                 }
 392
 393                 memcpy(derivs_arg, derivs, sizeof(derivs));
 394         }
 395
 396         /* Shift the texture coordinate. This must be applied after the
 397          * derivative calculation.
 398          */
 399         for (int i = 0; i < 2; ++i)
 400                 coords[i] = LLVMBuildFAdd(builder, coords[i], LLVMConstReal(ctx->f32, 1.5), "");
 401
 402         if (is_array) {
 403                 /* for cube arrays coord.z = coord.w(array_index) * 8 + face */
 404                 /* coords_arg.w component - array_index for cube arrays */
 405                 LLVMValueRef tmp = LLVMBuildFMul(ctx->builder, coords_arg[3], LLVMConstReal(ctx->f32, 8.0), "");
 406                 coords[2] = LLVMBuildFAdd(ctx->builder, tmp, coords[2], "");
 407         }
 408
 409         memcpy(coords_arg, coords, sizeof(coords));
 410 }
 411
 412
 413 LLVMValueRef
 414 ac_build_fs_interp(struct ac_llvm_context *ctx,
 415                    LLVMValueRef llvm_chan,
 416                    LLVMValueRef attr_number,
 417                    LLVMValueRef params,
 418                    LLVMValueRef i,
 419                    LLVMValueRef j)
 420 {
 421         LLVMValueRef args[5];
 422         LLVMValueRef p1;
 423
 424         if (HAVE_LLVM < 0x0400) {
 425                 LLVMValueRef ij[2];
 426                 ij[0] = LLVMBuildBitCast(ctx->builder, i, ctx->i32, "");
 427                 ij[1] = LLVMBuildBitCast(ctx->builder, j, ctx->i32, "");
 428
 429                 args[0] = llvm_chan;
 430                 args[1] = attr_number;
 431                 args[2] = params;
 432                 args[3] = ac_build_gather_values(ctx, ij, 2);
 433                 return ac_emit_llvm_intrinsic(ctx, "llvm.SI.fs.interp",
 434                                               ctx->f32, args, 4,
 435                                               AC_FUNC_ATTR_READNONE);
 436         }
 437
 438         args[0] = i;
 439         args[1] = llvm_chan;
 440         args[2] = attr_number;
 441         args[3] = params;
 442
 443         p1 = ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.interp.p1",
 444                                     ctx->f32, args, 4, AC_FUNC_ATTR_READNONE);
 445
 446         args[0] = p1;
 447         args[1] = j;
 448         args[2] = llvm_chan;
 449         args[3] = attr_number;
 450         args[4] = params;
 451
 452         return ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.interp.p2",
 453                                       ctx->f32, args, 5, AC_FUNC_ATTR_READNONE);
 454 }
 455
 456 LLVMValueRef
 457 ac_build_fs_interp_mov(struct ac_llvm_context *ctx,
 458                        LLVMValueRef parameter,
 459                        LLVMValueRef llvm_chan,
 460                        LLVMValueRef attr_number,
 461                        LLVMValueRef params)
 462 {
 463         LLVMValueRef args[4];
 464         if (HAVE_LLVM < 0x0400) {
 465                 args[0] = llvm_chan;
 466                 args[1] = attr_number;
 467                 args[2] = params;
 468
 469                 return ac_emit_llvm_intrinsic(ctx,
 470                                               "llvm.SI.fs.constant",
 471                                               ctx->f32, args, 3,
 472                                               AC_FUNC_ATTR_READNONE);
 473         }
 474
 475         args[0] = parameter;
 476         args[1] = llvm_chan;
 477         args[2] = attr_number;
 478         args[3] = params;
 479
 480         return ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.interp.mov",
 481                                       ctx->f32, args, 4, AC_FUNC_ATTR_READNONE);
 482 }
 483
 484 LLVMValueRef
 485 ac_build_gep0(struct ac_llvm_context *ctx,
 486               LLVMValueRef base_ptr,
 487               LLVMValueRef index)
 488 {
 489         LLVMValueRef indices[2] = {
 490                 LLVMConstInt(ctx->i32, 0, 0),
 491                 index,
 492         };
 493         return LLVMBuildGEP(ctx->builder, base_ptr,
 494                             indices, 2, "");
 495 }
 496
 497 void
 498 ac_build_indexed_store(struct ac_llvm_context *ctx,
 499                        LLVMValueRef base_ptr, LLVMValueRef index,
 500                        LLVMValueRef value)
 501 {
 502         LLVMBuildStore(ctx->builder, value,
 503                        ac_build_gep0(ctx, base_ptr, index));
 504 }
 505
 506 /**
 507  * Build an LLVM bytecode indexed load using LLVMBuildGEP + LLVMBuildLoad.
 508  * It's equivalent to doing a load from &base_ptr[index].
 509  *
 510  * \param base_ptr  Where the array starts.
 511  * \param index     The element index into the array.
 512  * \param uniform   Whether the base_ptr and index can be assumed to be
 513  *                  dynamically uniform
 514  */
 515 LLVMValueRef
 516 ac_build_indexed_load(struct ac_llvm_context *ctx,
 517                       LLVMValueRef base_ptr, LLVMValueRef index,
 518                       bool uniform)
 519 {
 520         LLVMValueRef pointer;
 521
 522         pointer = ac_build_gep0(ctx, base_ptr, index);
 523         if (uniform)
 524                 LLVMSetMetadata(pointer, ctx->uniform_md_kind, ctx->empty_md);
 525         return LLVMBuildLoad(ctx->builder, pointer, "");
 526 }
 527
 528 /**
 529  * Do a load from &base_ptr[index], but also add a flag that it's loading
 530  * a constant from a dynamically uniform index.
 531  */
 532 LLVMValueRef
 533 ac_build_indexed_load_const(struct ac_llvm_context *ctx,
 534                             LLVMValueRef base_ptr, LLVMValueRef index)
 535 {
 536         LLVMValueRef result = ac_build_indexed_load(ctx, base_ptr, index, true);
 537         LLVMSetMetadata(result, ctx->invariant_load_md_kind, ctx->empty_md);
 538         return result;
 539 }
 540
 541 /* TBUFFER_STORE_FORMAT_{X,XY,XYZ,XYZW} <- the suffix is selected by num_channels=1..4.
 542  * The type of vdata must be one of i32 (num_channels=1), v2i32 (num_channels=2),
 543  * or v4i32 (num_channels=3,4).
 544  */
 545 void
 546 ac_build_tbuffer_store(struct ac_llvm_context *ctx,
 547                        LLVMValueRef rsrc,
 548                        LLVMValueRef vdata,
 549                        unsigned num_channels,
 550                        LLVMValueRef vaddr,
 551                        LLVMValueRef soffset,
 552                        unsigned inst_offset,
 553                        unsigned dfmt,
 554                        unsigned nfmt,
 555                        unsigned offen,
 556                        unsigned idxen,
 557                        unsigned glc,
 558                        unsigned slc,
 559                        unsigned tfe)
 560 {
 561         LLVMValueRef args[] = {
 562                 rsrc,
 563                 vdata,
 564                 LLVMConstInt(ctx->i32, num_channels, 0),
 565                 vaddr,
 566                 soffset,
 567                 LLVMConstInt(ctx->i32, inst_offset, 0),
 568                 LLVMConstInt(ctx->i32, dfmt, 0),
 569                 LLVMConstInt(ctx->i32, nfmt, 0),
 570                 LLVMConstInt(ctx->i32, offen, 0),
 571                 LLVMConstInt(ctx->i32, idxen, 0),
 572                 LLVMConstInt(ctx->i32, glc, 0),
 573                 LLVMConstInt(ctx->i32, slc, 0),
 574                 LLVMConstInt(ctx->i32, tfe, 0)
 575         };
 576
 577         /* The instruction offset field has 12 bits */
 578         assert(offen || inst_offset < (1 << 12));
 579
 580         /* The intrinsic is overloaded, we need to add a type suffix for overloading to work. */
 581         unsigned func = CLAMP(num_channels, 1, 3) - 1;
 582         const char *types[] = {"i32", "v2i32", "v4i32"};
 583         char name[256];
 584         snprintf(name, sizeof(name), "llvm.SI.tbuffer.store.%s", types[func]);
 585
 586         ac_emit_llvm_intrinsic(ctx, name, ctx->voidt,
 587                                args, ARRAY_SIZE(args),
 588                                AC_FUNC_ATTR_LEGACY);
 589 }
 590
 591 void
 592 ac_build_tbuffer_store_dwords(struct ac_llvm_context *ctx,
 593                               LLVMValueRef rsrc,
 594                               LLVMValueRef vdata,
 595                               unsigned num_channels,
 596                               LLVMValueRef vaddr,
 597                               LLVMValueRef soffset,
 598                               unsigned inst_offset)
 599 {
 600         static unsigned dfmt[] = {
 601                 V_008F0C_BUF_DATA_FORMAT_32,
 602                 V_008F0C_BUF_DATA_FORMAT_32_32,
 603                 V_008F0C_BUF_DATA_FORMAT_32_32_32,
 604                 V_008F0C_BUF_DATA_FORMAT_32_32_32_32
 605         };
 606         assert(num_channels >= 1 && num_channels <= 4);
 607
 608         ac_build_tbuffer_store(ctx, rsrc, vdata, num_channels, vaddr, soffset,
 609                                inst_offset, dfmt[num_channels - 1],
 610                                V_008F0C_BUF_NUM_FORMAT_UINT, 1, 0, 1, 1, 0);
 611 }
 612
 613 LLVMValueRef
 614 ac_build_buffer_load(struct ac_llvm_context *ctx,
 615                      LLVMValueRef rsrc,
 616                      int num_channels,
 617                      LLVMValueRef vindex,
 618                      LLVMValueRef voffset,
 619                      LLVMValueRef soffset,
 620                      unsigned inst_offset,
 621                      unsigned glc,
 622                      unsigned slc)
 623 {
 624         unsigned func = CLAMP(num_channels, 1, 3) - 1;
 625
 626         if (HAVE_LLVM >= 0x309) {
 627                 LLVMValueRef args[] = {
 628                         LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""),
 629                         vindex ? vindex : LLVMConstInt(ctx->i32, 0, 0),
 630                         LLVMConstInt(ctx->i32, inst_offset, 0),
 631                         LLVMConstInt(ctx->i1, glc, 0),
 632                         LLVMConstInt(ctx->i1, slc, 0)
 633                 };
 634
 635                 LLVMTypeRef types[] = {ctx->f32, LLVMVectorType(ctx->f32, 2),
 636                                        ctx->v4f32};
 637                 const char *type_names[] = {"f32", "v2f32", "v4f32"};
 638                 char name[256];
 639
 640                 if (voffset) {
 641                         args[2] = LLVMBuildAdd(ctx->builder, args[2], voffset,
 642                                                "");
 643                 }
 644
 645                 if (soffset) {
 646                         args[2] = LLVMBuildAdd(ctx->builder, args[2], soffset,
 647                                                "");
 648                 }
 649
 650                 snprintf(name, sizeof(name), "llvm.amdgcn.buffer.load.%s",
 651                          type_names[func]);
 652
 653                 return ac_emit_llvm_intrinsic(ctx, name, types[func], args,
 654                                               ARRAY_SIZE(args), AC_FUNC_ATTR_READONLY);
 655         } else {
 656                 LLVMValueRef args[] = {
 657                         LLVMBuildBitCast(ctx->builder, rsrc, ctx->v16i8, ""),
 658                         voffset ? voffset : vindex,
 659                         soffset,
 660                         LLVMConstInt(ctx->i32, inst_offset, 0),
 661                         LLVMConstInt(ctx->i32, voffset ? 1 : 0, 0), // offen
 662                         LLVMConstInt(ctx->i32, vindex ? 1 : 0, 0), //idxen
 663                         LLVMConstInt(ctx->i32, glc, 0),
 664                         LLVMConstInt(ctx->i32, slc, 0),
 665                         LLVMConstInt(ctx->i32, 0, 0), // TFE
 666                 };
 667
 668                 LLVMTypeRef types[] = {ctx->i32, LLVMVectorType(ctx->i32, 2),
 669                                        ctx->v4i32};
 670                 const char *type_names[] = {"i32", "v2i32", "v4i32"};
 671                 const char *arg_type = "i32";
 672                 char name[256];
 673
 674                 if (voffset && vindex) {
 675                         LLVMValueRef vaddr[] = {vindex, voffset};
 676
 677                         arg_type = "v2i32";
 678                         args[1] = ac_build_gather_values(ctx, vaddr, 2);
 679                 }
 680
 681                 snprintf(name, sizeof(name), "llvm.SI.buffer.load.dword.%s.%s",
 682                          type_names[func], arg_type);
 683
 684                 return ac_emit_llvm_intrinsic(ctx, name, types[func], args,
 685                                                ARRAY_SIZE(args), AC_FUNC_ATTR_READONLY);
 686         }
 687 }
 688
 689 /**
 690  * Set range metadata on an instruction.  This can only be used on load and
 691  * call instructions.  If you know an instruction can only produce the values
 692  * 0, 1, 2, you would do set_range_metadata(value, 0, 3);
 693  * \p lo is the minimum value inclusive.
 694  * \p hi is the maximum value exclusive.
 695  */
 696 static void set_range_metadata(struct ac_llvm_context *ctx,
 697                                LLVMValueRef value, unsigned lo, unsigned hi)
 698 {
 699         LLVMValueRef range_md, md_args[2];
 700         LLVMTypeRef type = LLVMTypeOf(value);
 701         LLVMContextRef context = LLVMGetTypeContext(type);
 702
 703         md_args[0] = LLVMConstInt(type, lo, false);
 704         md_args[1] = LLVMConstInt(type, hi, false);
 705         range_md = LLVMMDNodeInContext(context, md_args, 2);
 706         LLVMSetMetadata(value, ctx->range_md_kind, range_md);
 707 }
 708
 709 LLVMValueRef
 710 ac_get_thread_id(struct ac_llvm_context *ctx)
 711 {
 712         LLVMValueRef tid;
 713
 714         if (HAVE_LLVM < 0x0308) {
 715                 tid = ac_emit_llvm_intrinsic(ctx, "llvm.SI.tid",
 716                                              ctx->i32,
 717                                              NULL, 0, AC_FUNC_ATTR_READNONE);
 718         } else {
 719                 LLVMValueRef tid_args[2];
 720                 tid_args[0] = LLVMConstInt(ctx->i32, 0xffffffff, false);
 721                 tid_args[1] = LLVMConstInt(ctx->i32, 0, false);
 722                 tid_args[1] = ac_emit_llvm_intrinsic(ctx,
 723                                                      "llvm.amdgcn.mbcnt.lo", ctx->i32,
 724                                                      tid_args, 2, AC_FUNC_ATTR_READNONE);
 725
 726                 tid = ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.mbcnt.hi",
 727                                              ctx->i32, tid_args,
 728                                              2, AC_FUNC_ATTR_READNONE);
 729         }
 730         set_range_metadata(ctx, tid, 0, 64);
 731         return tid;
 732 }
 733
 734 /*
 735  * SI implements derivatives using the local data store (LDS)
 736  * All writes to the LDS happen in all executing threads at
 737  * the same time. TID is the Thread ID for the current
 738  * thread and is a value between 0 and 63, representing
 739  * the thread's position in the wavefront.
 740  *
 741  * For the pixel shader threads are grouped into quads of four pixels.
 742  * The TIDs of the pixels of a quad are:
 743  *
 744  *  +------+------+
 745  *  |4n + 0|4n + 1|
 746  *  +------+------+
 747  *  |4n + 2|4n + 3|
 748  *  +------+------+
 749  *
 750  * So, masking the TID with 0xfffffffc yields the TID of the top left pixel
 751  * of the quad, masking with 0xfffffffd yields the TID of the top pixel of
 752  * the current pixel's column, and masking with 0xfffffffe yields the TID
 753  * of the left pixel of the current pixel's row.
 754  *
 755  * Adding 1 yields the TID of the pixel to the right of the left pixel, and
 756  * adding 2 yields the TID of the pixel below the top pixel.
 757  */
 758 LLVMValueRef
 759 ac_emit_ddxy(struct ac_llvm_context *ctx,
 760              bool has_ds_bpermute,
 761              uint32_t mask,
 762              int idx,
 763              LLVMValueRef lds,
 764              LLVMValueRef val)
 765 {
 766         LLVMValueRef thread_id, tl, trbl, tl_tid, trbl_tid, args[2];
 767         LLVMValueRef result;
 768
 769         thread_id = ac_get_thread_id(ctx);
 770
 771         tl_tid = LLVMBuildAnd(ctx->builder, thread_id,
 772                               LLVMConstInt(ctx->i32, mask, false), "");
 773
 774         trbl_tid = LLVMBuildAdd(ctx->builder, tl_tid,
 775                                 LLVMConstInt(ctx->i32, idx, false), "");
 776
 777         if (has_ds_bpermute) {
 778                 args[0] = LLVMBuildMul(ctx->builder, tl_tid,
 779                                        LLVMConstInt(ctx->i32, 4, false), "");
 780                 args[1] = val;
 781                 tl = ac_emit_llvm_intrinsic(ctx,
 782                                             "llvm.amdgcn.ds.bpermute", ctx->i32,
 783                                             args, 2, AC_FUNC_ATTR_READNONE);
 784
 785                 args[0] = LLVMBuildMul(ctx->builder, trbl_tid,
 786                                        LLVMConstInt(ctx->i32, 4, false), "");
 787                 trbl = ac_emit_llvm_intrinsic(ctx,
 788                                               "llvm.amdgcn.ds.bpermute", ctx->i32,
 789                                               args, 2, AC_FUNC_ATTR_READNONE);
 790         } else {
 791                 LLVMValueRef store_ptr, load_ptr0, load_ptr1;
 792
 793                 store_ptr = ac_build_gep0(ctx, lds, thread_id);
 794                 load_ptr0 = ac_build_gep0(ctx, lds, tl_tid);
 795                 load_ptr1 = ac_build_gep0(ctx, lds, trbl_tid);
 796
 797                 LLVMBuildStore(ctx->builder, val, store_ptr);
 798                 tl = LLVMBuildLoad(ctx->builder, load_ptr0, "");
 799                 trbl = LLVMBuildLoad(ctx->builder, load_ptr1, "");
 800         }
 801
 802         tl = LLVMBuildBitCast(ctx->builder, tl, ctx->f32, "");
 803         trbl = LLVMBuildBitCast(ctx->builder, trbl, ctx->f32, "");
 804         result = LLVMBuildFSub(ctx->builder, trbl, tl, "");
 805         return result;
 806 }
 807
 808 void
 809 ac_emit_sendmsg(struct ac_llvm_context *ctx,
 810                 uint32_t msg,
 811                 LLVMValueRef wave_id)
 812 {
 813         LLVMValueRef args[2];
 814         const char *intr_name = (HAVE_LLVM < 0x0400) ? "llvm.SI.sendmsg" : "llvm.amdgcn.s.sendmsg";
 815         args[0] = LLVMConstInt(ctx->i32, msg, false);
 816         args[1] = wave_id;
 817         ac_emit_llvm_intrinsic(ctx, intr_name, ctx->voidt,
 818                                args, 2, 0);
 819 }
 820
 821 LLVMValueRef
 822 ac_emit_imsb(struct ac_llvm_context *ctx,
 823              LLVMValueRef arg,
 824              LLVMTypeRef dst_type)
 825 {
 826         const char *intr_name = (HAVE_LLVM < 0x0400) ? "llvm.AMDGPU.flbit.i32" :
 827                                                        "llvm.amdgcn.sffbh.i32";
 828         LLVMValueRef msb = ac_emit_llvm_intrinsic(ctx, intr_name,
 829                                                   dst_type, &arg, 1,
 830                                                   AC_FUNC_ATTR_READNONE);
 831
 832         /* The HW returns the last bit index from MSB, but NIR/TGSI wants
 833          * the index from LSB. Invert it by doing "31 - msb". */
 834         msb = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, 31, false),
 835                            msb, "");
 836
 837         LLVMValueRef all_ones = LLVMConstInt(ctx->i32, -1, true);
 838         LLVMValueRef cond = LLVMBuildOr(ctx->builder,
 839                                         LLVMBuildICmp(ctx->builder, LLVMIntEQ,
 840                                                       arg, LLVMConstInt(ctx->i32, 0, 0), ""),
 841                                         LLVMBuildICmp(ctx->builder, LLVMIntEQ,
 842                                                       arg, all_ones, ""), "");
 843
 844         return LLVMBuildSelect(ctx->builder, cond, all_ones, msb, "");
 845 }
 846
 847 LLVMValueRef
 848 ac_emit_umsb(struct ac_llvm_context *ctx,
 849              LLVMValueRef arg,
 850              LLVMTypeRef dst_type)
 851 {
 852         LLVMValueRef args[2] = {
 853                 arg,
 854                 LLVMConstInt(ctx->i1, 1, 0),
 855         };
 856         LLVMValueRef msb = ac_emit_llvm_intrinsic(ctx, "llvm.ctlz.i32",
 857                                                   dst_type, args, ARRAY_SIZE(args),
 858                                                   AC_FUNC_ATTR_READNONE);
 859
 860         /* The HW returns the last bit index from MSB, but TGSI/NIR wants
 861          * the index from LSB. Invert it by doing "31 - msb". */
 862         msb = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, 31, false),
 863                            msb, "");
 864
 865         /* check for zero */
 866         return LLVMBuildSelect(ctx->builder,
 867                                LLVMBuildICmp(ctx->builder, LLVMIntEQ, arg,
 868                                              LLVMConstInt(ctx->i32, 0, 0), ""),
 869                                LLVMConstInt(ctx->i32, -1, true), msb, "");
 870 }
 871
 872 LLVMValueRef ac_emit_clamp(struct ac_llvm_context *ctx, LLVMValueRef value)
 873 {
 874         if (HAVE_LLVM >= 0x0500) {
 875                 LLVMValueRef max[2] = {
 876                         value,
 877                         LLVMConstReal(ctx->f32, 0),
 878                 };
 879                 LLVMValueRef min[2] = {
 880                         LLVMConstReal(ctx->f32, 1),
 881                 };
 882
 883                 min[1] = ac_emit_llvm_intrinsic(ctx, "llvm.maxnum.f32",
 884                                                 ctx->f32, max, 2,
 885                                                 AC_FUNC_ATTR_READNONE);
 886                 return ac_emit_llvm_intrinsic(ctx, "llvm.minnum.f32",
 887                                               ctx->f32, min, 2,
 888                                               AC_FUNC_ATTR_READNONE);
 889         }
 890
 891         const char *intr = HAVE_LLVM >= 0x0308 ? "llvm.AMDGPU.clamp." :
 892                                                  "llvm.AMDIL.clamp.";
 893         LLVMValueRef args[3] = {
 894                 value,
 895                 LLVMConstReal(ctx->f32, 0),
 896                 LLVMConstReal(ctx->f32, 1),
 897         };
 898
 899         return ac_emit_llvm_intrinsic(ctx, intr, ctx->f32, args, 3,
 900                                       AC_FUNC_ATTR_READNONE |
 901                                       AC_FUNC_ATTR_LEGACY);
 902 }
 903
 904 void ac_emit_export(struct ac_llvm_context *ctx, struct ac_export_args *a)
 905 {
 906         LLVMValueRef args[9];
 907
 908         if (HAVE_LLVM >= 0x0500) {
 909                 args[0] = LLVMConstInt(ctx->i32, a->target, 0);
 910                 args[1] = LLVMConstInt(ctx->i32, a->enabled_channels, 0);
 911
 912                 if (a->compr) {
 913                         LLVMTypeRef i16 = LLVMInt16TypeInContext(ctx->context);
 914                         LLVMTypeRef v2i16 = LLVMVectorType(i16, 2);
 915
 916                         args[2] = LLVMBuildBitCast(ctx->builder, a->out[0],
 917                                                    v2i16, "");
 918                         args[3] = LLVMBuildBitCast(ctx->builder, a->out[1],
 919                                                    v2i16, "");
 920                         args[4] = LLVMConstInt(ctx->i1, a->done, 0);
 921                         args[5] = LLVMConstInt(ctx->i1, a->valid_mask, 0);
 922
 923                         ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.exp.compr.v2i16",
 924                                                ctx->voidt, args, 6, 0);
 925                 } else {
 926                         args[2] = a->out[0];
 927                         args[3] = a->out[1];
 928                         args[4] = a->out[2];
 929                         args[5] = a->out[3];
 930                         args[6] = LLVMConstInt(ctx->i1, a->done, 0);
 931                         args[7] = LLVMConstInt(ctx->i1, a->valid_mask, 0);
 932
 933                         ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.exp.f32",
 934                                                ctx->voidt, args, 8, 0);
 935                 }
 936                 return;
 937         }
 938
 939         args[0] = LLVMConstInt(ctx->i32, a->enabled_channels, 0);
 940         args[1] = LLVMConstInt(ctx->i32, a->valid_mask, 0);
 941         args[2] = LLVMConstInt(ctx->i32, a->done, 0);
 942         args[3] = LLVMConstInt(ctx->i32, a->target, 0);
 943         args[4] = LLVMConstInt(ctx->i32, a->compr, 0);
 944         memcpy(args + 5, a->out, sizeof(a->out[0]) * 4);
 945
 946         ac_emit_llvm_intrinsic(ctx, "llvm.SI.export", ctx->voidt, args, 9,
 947                                AC_FUNC_ATTR_LEGACY);
 948 }
 949
 950 LLVMValueRef ac_emit_image_opcode(struct ac_llvm_context *ctx,
 951                                   struct ac_image_args *a)
 952 {
 953         LLVMTypeRef dst_type;
 954         LLVMValueRef args[11];
 955         unsigned num_args = 0;
 956         const char *name;
 957         char intr_name[128], type[64];
 958
 959         if (HAVE_LLVM >= 0x0400) {
 960                 bool sample = a->opcode == ac_image_sample ||
 961                               a->opcode == ac_image_gather4 ||
 962                               a->opcode == ac_image_get_lod;
 963
 964                 if (sample)
 965                         args[num_args++] = bitcast_to_float(ctx, a->addr);
 966                 else
 967                         args[num_args++] = a->addr;
 968
 969                 args[num_args++] = a->resource;
 970                 if (sample)
 971                         args[num_args++] = a->sampler;
 972                 args[num_args++] = LLVMConstInt(ctx->i32, a->dmask, 0);
 973                 if (sample)
 974                         args[num_args++] = LLVMConstInt(ctx->i1, a->unorm, 0);
 975                 args[num_args++] = LLVMConstInt(ctx->i1, 0, 0); /* glc */
 976                 args[num_args++] = LLVMConstInt(ctx->i1, 0, 0); /* slc */
 977                 args[num_args++] = LLVMConstInt(ctx->i1, 0, 0); /* lwe */
 978                 args[num_args++] = LLVMConstInt(ctx->i1, a->da, 0);
 979
 980                 switch (a->opcode) {
 981                 case ac_image_sample:
 982                         name = "llvm.amdgcn.image.sample";
 983                         break;
 984                 case ac_image_gather4:
 985                         name = "llvm.amdgcn.image.gather4";
 986                         break;
 987                 case ac_image_load:
 988                         name = "llvm.amdgcn.image.load";
 989                         break;
 990                 case ac_image_load_mip:
 991                         name = "llvm.amdgcn.image.load.mip";
 992                         break;
 993                 case ac_image_get_lod:
 994                         name = "llvm.amdgcn.image.getlod";
 995                         break;
 996                 case ac_image_get_resinfo:
 997                         name = "llvm.amdgcn.image.getresinfo";
 998                         break;
 999                 }
1000
1001                 ac_build_type_name_for_intr(LLVMTypeOf(args[0]), type,
1002                                             sizeof(type));
1003
1004                 snprintf(intr_name, sizeof(intr_name), "%s%s%s%s.v4f32.%s.v8i32",
1005                         name,
1006                         a->compare ? ".c" : "",
1007                         a->bias ? ".b" :
1008                         a->lod ? ".l" :
1009                         a->deriv ? ".d" :
1010                         a->level_zero ? ".lz" : "",
1011                         a->offset ? ".o" : "",
1012                         type);
1013
1014                 LLVMValueRef result =
1015                         ac_emit_llvm_intrinsic(ctx, intr_name,
1016                                                ctx->v4f32, args, num_args,
1017                                                AC_FUNC_ATTR_READNONE);
1018                 if (!sample) {
1019                         result = LLVMBuildBitCast(ctx->builder, result,
1020                                                   ctx->v4i32, "");
1021                 }
1022                 return result;
1023         }
1024
1025         args[num_args++] = a->addr;
1026         args[num_args++] = a->resource;
1027
1028         if (a->opcode == ac_image_load ||
1029             a->opcode == ac_image_load_mip ||
1030             a->opcode == ac_image_get_resinfo) {
1031                 dst_type = ctx->v4i32;
1032         } else {
1033                 dst_type = ctx->v4f32;
1034                 args[num_args++] = a->sampler;
1035         }
1036
1037         args[num_args++] = LLVMConstInt(ctx->i32, a->dmask, 0);
1038         args[num_args++] = LLVMConstInt(ctx->i32, a->unorm, 0);
1039         args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* r128 */
1040         args[num_args++] = LLVMConstInt(ctx->i32, a->da, 0);
1041         args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* glc */
1042         args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* slc */
1043         args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* tfe */
1044         args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* lwe */
1045
1046         switch (a->opcode) {
1047         case ac_image_sample:
1048                 name = "llvm.SI.image.sample";
1049                 break;
1050         case ac_image_gather4:
1051                 name = "llvm.SI.gather4";
1052                 break;
1053         case ac_image_load:
1054                 name = "llvm.SI.image.load";
1055                 break;
1056         case ac_image_load_mip:
1057                 name = "llvm.SI.image.load.mip";
1058                 break;
1059         case ac_image_get_lod:
1060                 name = "llvm.SI.getlod";
1061                 break;
1062         case ac_image_get_resinfo:
1063                 name = "llvm.SI.getresinfo";
1064                 break;
1065         }
1066
1067         ac_build_type_name_for_intr(LLVMTypeOf(a->addr), type, sizeof(type));
1068         snprintf(intr_name, sizeof(intr_name), "%s%s%s%s.%s",
1069                 name,
1070                 a->compare ? ".c" : "",
1071                 a->bias ? ".b" :
1072                 a->lod ? ".l" :
1073                 a->deriv ? ".d" :
1074                 a->level_zero ? ".lz" : "",
1075                 a->offset ? ".o" : "",
1076                 type);
1077
1078         return ac_emit_llvm_intrinsic(ctx, intr_name,
1079                                       dst_type, args, num_args,
1080                                       AC_FUNC_ATTR_READNONE |
1081                                       AC_FUNC_ATTR_LEGACY);
1082 }