1 /* 2 * Copyright (C) 2019 Connor Abbott <cwabbott0@gmail.com> 3 * Copyright (C) 2019 Lyude Paul <thatslyude@gmail.com> 4 * Copyright (C) 2019 Ryan Houdek <Sonicadvance1@gmail.com> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 */ 25 26 #ifndef __bifrost_h__ 27 #define __bifrost_h__ 28 29 #include <stdint.h> 30 #include <stdbool.h> 31 32 #define BIFROST_DBG_MSGS 0x0001 33 #define BIFROST_DBG_SHADERS 0x0002 34 35 extern int bifrost_debug; 36 37 enum bifrost_message_type { 38 BIFROST_MESSAGE_NONE = 0, 39 BIFROST_MESSAGE_VARYING = 1, 40 BIFROST_MESSAGE_ATTRIBUTE = 2, 41 BIFROST_MESSAGE_TEX = 3, 42 BIFROST_MESSAGE_VARTEX = 4, 43 BIFROST_MESSAGE_LOAD = 5, 44 BIFROST_MESSAGE_STORE = 6, 45 BIFROST_MESSAGE_ATOMIC = 7, 46 BIFROST_MESSAGE_BARRIER = 8, 47 BIFROST_MESSAGE_BLEND = 9, 48 BIFROST_MESSAGE_TILE = 10, 49 /* type 11 reserved */ 50 BIFROST_MESSAGE_Z_STENCIL = 12, 51 BIFROST_MESSAGE_ATEST = 13, 52 BIFROST_MESSAGE_JOB = 14, 53 BIFROST_MESSAGE_64BIT = 15 54 }; 55 56 enum bifrost_ftz { 57 BIFROST_FTZ_DISABLE = 0, 58 BIFROST_FTZ_DX11 = 1, 59 BIFROST_FTZ_ALWAYS = 2, 60 BIFROST_FTZ_ABRUPT = 3 61 }; 62 63 enum bifrost_exceptions { 64 BIFROST_EXCEPTIONS_ENABLED = 0, 65 BIFROST_EXCEPTIONS_DISABLED = 1, 66 BIFROST_EXCEPTIONS_PRECISE_DIVISION = 2, 67 BIFROST_EXCEPTIONS_PRECISE_SQRT = 3, 68 }; 69 70 /* Describes clause flow control, with respect to control flow and branch 71 * reconvergence. 72 * 73 * Control flow may be considered back-to-back (execute clauses back-to-back), 74 * non-back-to-back (switch warps after clause before the next clause), write 75 * elision (back-to-back and elide register slot #3 write from the clause), or 76 * end of shader. 77 * 78 * Branch reconvergence may be disabled, enabled unconditionally, or enabled 79 * based on the program counter. A clause requires reconvergence if it has a 80 * successor that can be executed without first executing the clause itself. 81 * Separate iterations of a loop are treated separately here, so it is also the 82 * case for a loop exit where the iteration count is not warp-invariant. 83 * 84 */ 85 86 enum bifrost_flow { 87 /* End-of-shader */ 88 BIFROST_FLOW_END = 0, 89 90 /* Non back-to-back, PC-encoded reconvergence */ 91 BIFROST_FLOW_NBTB_PC = 1, 92 93 /* Non back-to-back, unconditional reconvergence */ 94 BIFROST_FLOW_NBTB_UNCONDITIONAL = 2, 95 96 /* Non back-to-back, no reconvergence */ 97 BIFROST_FLOW_NBTB = 3, 98 99 /* Back-to-back, unconditional reconvergence */ 100 BIFROST_FLOW_BTB_UNCONDITIONAL = 4, 101 102 /* Back-to-back, no reconvergence */ 103 BIFROST_FLOW_BTB_NONE = 5, 104 105 /* Write elision, unconditional reconvergence */ 106 BIFROST_FLOW_WE_UNCONDITIONAL = 6, 107 108 /* Write elision, no reconvergence */ 109 BIFROST_FLOW_WE = 7, 110 }; 111 112 struct bifrost_header { 113 /* Reserved */ 114 unsigned zero1 : 5; 115 116 /* Flush-to-zero mode, leave zero for GL */ 117 enum bifrost_ftz flush_to_zero : 2; 118 119 /* Convert any infinite result of any floating-point operation to the 120 * biggest representable number */ 121 unsigned suppress_inf: 1; 122 123 /* Convert NaN to +0.0 */ 124 unsigned suppress_nan : 1; 125 126 /* Floating-point excception handling mode */ 127 enum bifrost_exceptions float_exceptions : 2; 128 129 /* Enum describing the flow control, which matters for handling 130 * divergence and reconvergence efficiently */ 131 enum bifrost_flow flow_control : 3; 132 133 /* Reserved */ 134 unsigned zero2 : 1; 135 136 /* Terminate discarded threads, rather than continuing execution. Set 137 * for fragment shaders for standard GL behaviour of DISCARD. Also in a 138 * fragment shader, this disables helper invocations, so cannot be used 139 * in a shader that requires derivatives or texture LOD computation */ 140 unsigned terminate_discarded_threads : 1; 141 142 /* If set, the hardware may prefetch the next clause. If false, the 143 * hardware may not. Clear for unconditional branches. */ 144 unsigned next_clause_prefetch : 1; 145 146 /* If set, a barrier will be inserted after the clause waiting for all 147 * message passing instructions to read their staging registers, such 148 * that it is safe for the next clause to write them. */ 149 unsigned staging_barrier: 1; 150 unsigned staging_register : 6; 151 152 /* Slots to wait on and slot to be used for message passing 153 * instructions respectively */ 154 unsigned dependency_wait : 8; 155 unsigned dependency_slot : 3; 156 157 enum bifrost_message_type message_type : 5; 158 enum bifrost_message_type next_message_type : 5; 159 } __attribute__((packed)); 160 161 enum bifrost_packed_src { 162 BIFROST_SRC_PORT0 = 0, 163 BIFROST_SRC_PORT1 = 1, 164 BIFROST_SRC_PORT2 = 2, 165 BIFROST_SRC_STAGE = 3, 166 BIFROST_SRC_FAU_LO = 4, 167 BIFROST_SRC_FAU_HI = 5, 168 BIFROST_SRC_PASS_FMA = 6, 169 BIFROST_SRC_PASS_ADD = 7, 170 }; 171 172 struct bifrost_fma_inst { 173 unsigned src0 : 3; 174 unsigned op : 20; 175 } __attribute__((packed)); 176 177 struct bifrost_add_inst { 178 unsigned src0 : 3; 179 unsigned op : 17; 180 } __attribute__((packed)); 181 182 enum bifrost_outmod { 183 BIFROST_NONE = 0x0, 184 BIFROST_POS = 0x1, 185 BIFROST_SAT_SIGNED = 0x2, 186 BIFROST_SAT = 0x3, 187 }; 188 189 enum bifrost_roundmode { 190 BIFROST_RTE = 0x0, /* round to even */ 191 BIFROST_RTP = 0x1, /* round to positive */ 192 BIFROST_RTN = 0x2, /* round to negative */ 193 BIFROST_RTZ = 0x3 /* round to zero */ 194 }; 195 196 /* NONE: Same as fmax() and fmin() -- return the other 197 * number if any number is NaN. Also always return +0 if 198 * one argument is +0 and the other is -0. 199 * 200 * NAN_WINS: Instead of never returning a NaN, always return 201 * one. The "greater"/"lesser" NaN is always returned, first 202 * by checking the sign and then the mantissa bits. 203 * 204 * SRC1_WINS: For max, implement src0 > src1 ? src0 : src1. 205 * For min, implement src0 < src1 ? src0 : src1. This 206 * includes handling NaN's and signedness of 0 differently 207 * from above, since +0 and -0 compare equal and comparisons 208 * always return false for NaN's. As a result, this mode is 209 * *not* commutative. 210 * 211 * SRC0_WINS: For max, implement src0 < src1 ? src1 : src0 212 * For min, implement src0 > src1 ? src1 : src0 213 */ 214 215 216 enum bifrost_minmax_mode { 217 BIFROST_MINMAX_NONE = 0x0, 218 BIFROST_NAN_WINS = 0x1, 219 BIFROST_SRC1_WINS = 0x2, 220 BIFROST_SRC0_WINS = 0x3, 221 }; 222 223 enum bifrost_interp_mode { 224 BIFROST_INTERP_CENTER = 0x0, 225 BIFROST_INTERP_CENTROID = 0x1, 226 BIFROST_INTERP_SAMPLE = 0x2, 227 BIFROST_INTERP_EXPLICIT = 0x3, 228 BIFROST_INTERP_NONE = 0x4, 229 }; 230 231 /* Fixed location for gl_FragCoord.zw */ 232 #define BIFROST_FRAGZ (23) 233 #define BIFROST_FRAGW (22) 234 235 enum branch_bit_size { 236 BR_SIZE_32 = 0, 237 BR_SIZE_16XX = 1, 238 BR_SIZE_16YY = 2, 239 // For the above combinations of bitsize and location, an extra bit is 240 // encoded via comparing the sources. The only possible source of ambiguity 241 // would be if the sources were the same, but then the branch condition 242 // would be always true or always false anyways, so we can ignore it. But 243 // this no longer works when comparing the y component to the x component, 244 // since it's valid to compare the y component of a source against its own 245 // x component. Instead, the extra bit is encoded via an extra bitsize. 246 BR_SIZE_16YX0 = 3, 247 BR_SIZE_16YX1 = 4, 248 BR_SIZE_32_AND_16X = 5, 249 BR_SIZE_32_AND_16Y = 6, 250 // Used for comparisons with zero and always-true, see below. I think this 251 // only works for integer comparisons. 252 BR_SIZE_ZERO = 7, 253 }; 254 255 struct bifrost_regs { 256 unsigned fau_idx : 8; 257 unsigned reg3 : 6; 258 unsigned reg2 : 6; 259 unsigned reg0 : 5; 260 unsigned reg1 : 6; 261 unsigned ctrl : 4; 262 } __attribute__((packed)); 263 264 enum bifrost_branch_cond { 265 BR_COND_LT = 0, 266 BR_COND_LE = 1, 267 BR_COND_GE = 2, 268 BR_COND_GT = 3, 269 // Equal vs. not-equal determined by src0/src1 comparison 270 BR_COND_EQ = 4, 271 // floating-point comparisons 272 // Becomes UNE when you flip the arguments 273 BR_COND_OEQ = 5, 274 // TODO what happens when you flip the arguments? 275 BR_COND_OGT = 6, 276 BR_COND_OLT = 7, 277 }; 278 279 enum bifrost_branch_code { 280 BR_ALWAYS = 63, 281 }; 282 283 #define BIFROST_ADD_OP_BRANCH (0x0d000 >> 12) 284 285 struct bifrost_branch { 286 unsigned src0 : 3; 287 288 /* For BR_SIZE_ZERO, upper two bits become ctrl */ 289 unsigned src1 : 3; 290 291 /* Offset source -- always uniform/const but 292 * theoretically could support indirect jumps? */ 293 unsigned src2 : 3; 294 295 enum bifrost_branch_cond cond : 3; 296 enum branch_bit_size size : 3; 297 298 unsigned op : 5; 299 }; 300 301 /* Clause packing */ 302 303 struct bifrost_fmt1 { 304 unsigned ins_0 : 3; 305 unsigned tag : 5; 306 uint64_t ins_1 : 64; 307 unsigned ins_2 : 11; 308 uint64_t header : 45; 309 } __attribute__((packed)); 310 311 #define BIFROST_FMT1_INSTRUCTIONS 0b00101 312 #define BIFROST_FMT1_FINAL 0b01001 313 #define BIFROST_FMT1_CONSTANTS 0b00001 314 315 #define BIFROST_FMTC_CONSTANTS 0b0011 316 #define BIFROST_FMTC_FINAL 0b0111 317 318 struct bifrost_fmt_constant { 319 unsigned pos : 4; 320 unsigned tag : 4; 321 uint64_t imm_1 : 60; 322 uint64_t imm_2 : 60; 323 } __attribute__((packed)); 324 325 /* 32-bit modes for slots 2/3, as encoded in the register block. Other values 326 * are reserved. First part specifies behaviour of slot 2 (Idle, Read, Write 327 * Full, Write Low, Write High), second part behaviour of slot 3, and the last 328 * part specifies the source for the write (FMA, ADD, or MIX for FMA/ADD). 329 * 330 * IDLE is a special mode disabling both slots, except for the first 331 * instruction in the clause which uses IDLE_1 for the same purpose. 332 * 333 * All fields 0 used as sentinel for reserved encoding, so IDLE(_1) have FMA 334 * set (and ignored) as a placeholder to differentiate from reserved. 335 */ 336 enum bifrost_reg_mode { 337 BIFROST_R_WL_FMA = 1, 338 BIFROST_R_WH_FMA = 2, 339 BIFROST_R_W_FMA = 3, 340 BIFROST_R_WL_ADD = 4, 341 BIFROST_R_WH_ADD = 5, 342 BIFROST_R_W_ADD = 6, 343 BIFROST_WL_WL_ADD = 7, 344 BIFROST_WL_WH_ADD = 8, 345 BIFROST_WL_W_ADD = 9, 346 BIFROST_WH_WL_ADD = 10, 347 BIFROST_WH_WH_ADD = 11, 348 BIFROST_WH_W_ADD = 12, 349 BIFROST_W_WL_ADD = 13, 350 BIFROST_W_WH_ADD = 14, 351 BIFROST_W_W_ADD = 15, 352 BIFROST_IDLE_1 = 16, 353 BIFROST_I_W_FMA = 17, 354 BIFROST_I_WL_FMA = 18, 355 BIFROST_I_WH_FMA = 19, 356 BIFROST_R_I = 20, 357 BIFROST_I_W_ADD = 21, 358 BIFROST_I_WL_ADD = 22, 359 BIFROST_I_WH_ADD = 23, 360 BIFROST_WL_WH_MIX = 24, 361 BIFROST_WH_WL_MIX = 26, 362 BIFROST_IDLE = 27, 363 }; 364 365 enum bifrost_reg_op { 366 BIFROST_OP_IDLE = 0, 367 BIFROST_OP_READ = 1, 368 BIFROST_OP_WRITE = 2, 369 BIFROST_OP_WRITE_LO = 3, 370 BIFROST_OP_WRITE_HI = 4, 371 }; 372 373 struct bifrost_reg_ctrl_23 { 374 enum bifrost_reg_op slot2; 375 enum bifrost_reg_op slot3; 376 bool slot3_fma; 377 }; 378 379 static const struct bifrost_reg_ctrl_23 bifrost_reg_ctrl_lut[32] = { 380 [BIFROST_R_WL_FMA] = { BIFROST_OP_READ, BIFROST_OP_WRITE_LO, true }, 381 [BIFROST_R_WH_FMA] = { BIFROST_OP_READ, BIFROST_OP_WRITE_HI, true }, 382 [BIFROST_R_W_FMA] = { BIFROST_OP_READ, BIFROST_OP_WRITE, true }, 383 [BIFROST_R_WL_ADD] = { BIFROST_OP_READ, BIFROST_OP_WRITE_LO, false }, 384 [BIFROST_R_WH_ADD] = { BIFROST_OP_READ, BIFROST_OP_WRITE_HI, false }, 385 [BIFROST_R_W_ADD] = { BIFROST_OP_READ, BIFROST_OP_WRITE, false }, 386 [BIFROST_WL_WL_ADD] = { BIFROST_OP_WRITE_LO, BIFROST_OP_WRITE_LO, false }, 387 [BIFROST_WL_WH_ADD] = { BIFROST_OP_WRITE_LO, BIFROST_OP_WRITE_HI, false }, 388 [BIFROST_WL_W_ADD] = { BIFROST_OP_WRITE_LO, BIFROST_OP_WRITE, false }, 389 [BIFROST_WH_WL_ADD] = { BIFROST_OP_WRITE_HI, BIFROST_OP_WRITE_LO, false }, 390 [BIFROST_WH_WH_ADD] = { BIFROST_OP_WRITE_HI, BIFROST_OP_WRITE_HI, false }, 391 [BIFROST_WH_W_ADD] = { BIFROST_OP_WRITE_HI, BIFROST_OP_WRITE, false }, 392 [BIFROST_W_WL_ADD] = { BIFROST_OP_WRITE, BIFROST_OP_WRITE_LO, false }, 393 [BIFROST_W_WH_ADD] = { BIFROST_OP_WRITE, BIFROST_OP_WRITE_HI, false }, 394 [BIFROST_W_W_ADD] = { BIFROST_OP_WRITE, BIFROST_OP_WRITE, false }, 395 [BIFROST_IDLE_1] = { BIFROST_OP_IDLE, BIFROST_OP_IDLE, true }, 396 [BIFROST_I_W_FMA] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE, true }, 397 [BIFROST_I_WL_FMA] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE_LO, true }, 398 [BIFROST_I_WH_FMA] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE_HI, true }, 399 [BIFROST_R_I] = { BIFROST_OP_READ, BIFROST_OP_IDLE, false }, 400 [BIFROST_I_W_ADD] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE, false }, 401 [BIFROST_I_WL_ADD] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE_LO, false }, 402 [BIFROST_I_WH_ADD] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE_HI, false }, 403 [BIFROST_WL_WH_MIX] = { BIFROST_OP_WRITE_LO, BIFROST_OP_WRITE_HI, false }, 404 [BIFROST_WH_WL_MIX] = { BIFROST_OP_WRITE_HI, BIFROST_OP_WRITE_LO, false }, 405 [BIFROST_IDLE] = { BIFROST_OP_IDLE, BIFROST_OP_IDLE, true }, 406 }; 407 408 /* Texture operator descriptors in various states. Usually packed in the 409 * compiler and stored as a constant */ 410 411 enum bifrost_index { 412 /* Both texture/sampler index immediate */ 413 BIFROST_INDEX_IMMEDIATE_SHARED = 0, 414 415 /* Sampler index immediate, texture index from staging */ 416 BIFROST_INDEX_IMMEDIATE_SAMPLER = 1, 417 418 /* Texture index immediate, sampler index from staging */ 419 BIFROST_INDEX_IMMEDIATE_TEXTURE = 2, 420 421 /* Both indices from (separate) staging registers */ 422 BIFROST_INDEX_REGISTER = 3, 423 }; 424 425 enum bifrost_tex_op { 426 /* Given explicit derivatives, compute a gradient descriptor */ 427 BIFROST_TEX_OP_GRDESC_DER = 4, 428 429 /* Given implicit derivatives (texture coordinates in a fragment 430 * shader), compute a gradient descriptor */ 431 BIFROST_TEX_OP_GRDESC = 5, 432 433 /* Fetch a texel. Takes a staging register with LOD level / face index 434 * packed 16:16 */ 435 BIFROST_TEX_OP_FETCH = 6, 436 437 /* Filtered texture */ 438 BIFROST_TEX_OP_TEX = 7, 439 }; 440 441 enum bifrost_lod_mode { 442 /* Takes two staging registers forming a 64-bit gradient descriptor 443 * (computed by a previous GRDESC or GRDESC_DER operation) */ 444 BIFROST_LOD_MODE_GRDESC = 3, 445 446 /* Take a staging register with 8:8 fixed-point in bottom 16-bits 447 * specifying an explicit LOD */ 448 BIFROST_LOD_MODE_EXPLICIT = 4, 449 450 /* Takes a staging register with bottom 16-bits as 8:8 fixed-point LOD 451 * bias and top 16-bit as 8:8 fixed-point lower bound (generally left 452 * zero), added and clamped to a computed LOD */ 453 BIFROST_LOD_MODE_BIAS = 5, 454 455 /* Set LOD to zero */ 456 BIFROST_LOD_MODE_ZERO = 6, 457 458 /* Compute LOD */ 459 BIFROST_LOD_MODE_COMPUTE = 7, 460 }; 461 462 enum bifrost_texture_format { 463 /* 16-bit floating point, with optional clamping */ 464 BIFROST_TEXTURE_FORMAT_F16 = 0, 465 BIFROST_TEXTURE_FORMAT_F16_POS = 1, 466 BIFROST_TEXTURE_FORMAT_F16_PM1 = 2, 467 BIFROST_TEXTURE_FORMAT_F16_1 = 3, 468 469 /* 32-bit floating point, with optional clamping */ 470 BIFROST_TEXTURE_FORMAT_F32 = 4, 471 BIFROST_TEXTURE_FORMAT_F32_POS = 5, 472 BIFROST_TEXTURE_FORMAT_F32_PM1 = 6, 473 BIFROST_TEXTURE_FORMAT_F32_1 = 7, 474 }; 475 476 enum bifrost_texture_format_full { 477 /* Transclude bifrost_texture_format from above */ 478 479 /* Integers, unclamped */ 480 BIFROST_TEXTURE_FORMAT_U16 = 12, 481 BIFROST_TEXTURE_FORMAT_S16 = 13, 482 BIFROST_TEXTURE_FORMAT_U32 = 14, 483 BIFROST_TEXTURE_FORMAT_S32 = 15, 484 }; 485 486 enum bifrost_texture_fetch { 487 /* Default texelFetch */ 488 BIFROST_TEXTURE_FETCH_TEXEL = 1, 489 490 /* Deprecated, fetches 4x U32 of a U8 x 4 texture. Do not use. */ 491 BIFROST_TEXTURE_FETCH_GATHER4_RGBA = 3, 492 493 /* Gathers */ 494 BIFROST_TEXTURE_FETCH_GATHER4_R = 4, 495 BIFROST_TEXTURE_FETCH_GATHER4_G = 5, 496 BIFROST_TEXTURE_FETCH_GATHER4_B = 6, 497 BIFROST_TEXTURE_FETCH_GATHER4_A = 7 498 }; 499 500 struct bifrost_texture_operation { 501 /* If immediate_indices is set: 502 * - immediate sampler index 503 * - index used as texture index 504 * Otherwise: 505 * - bifrost_single_index in lower 2 bits 506 * - 0x3 in upper 2 bits (single-texturing) 507 */ 508 unsigned sampler_index_or_mode : 4; 509 unsigned index : 7; 510 bool immediate_indices : 1; 511 enum bifrost_tex_op op : 3; 512 513 /* If set for TEX/FETCH, loads texel offsets and multisample index from 514 * a staging register containing offset_x:offset_y:offset_z:ms_index 515 * packed 8:8:8:8. Offsets must be in [-31, +31]. If set for 516 * GRDESC(_DER), disable LOD bias. */ 517 bool offset_or_bias_disable : 1; 518 519 /* If set for TEX/FETCH, loads fp32 shadow comparison value from a 520 * staging register. Implies fetch_component = gather4_r. If set for 521 * GRDESC(_DER), disables LOD clamping. */ 522 bool shadow_or_clamp_disable : 1; 523 524 /* If set, loads an uint32 array index from a staging register. */ 525 bool array : 1; 526 527 /* Texture dimension, or 0 for a cubemap */ 528 unsigned dimension : 2; 529 530 /* Method to compute LOD value or for a FETCH, the 531 * bifrost_texture_fetch component specification */ 532 enum bifrost_lod_mode lod_or_fetch : 3; 533 534 /* Reserved */ 535 unsigned zero : 1; 536 537 /* Register format for the result */ 538 enum bifrost_texture_format_full format : 4; 539 540 /* Write mask for the result */ 541 unsigned mask : 4; 542 } __attribute__((packed)); 543 544 #define BIFROST_MEGA_SAMPLE 128 545 #define BIFROST_ALL_SAMPLES 255 546 #define BIFROST_CURRENT_PIXEL 255 547 548 struct bifrost_pixel_indices { 549 unsigned sample : 8; 550 unsigned rt : 8; 551 unsigned x : 8; 552 unsigned y : 8; 553 } __attribute__((packed)); 554 555 #endif 556