src/panfrost/bifrost/bifrost.h

   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 enum bifrost_clause_type {
  33         BIFROST_CLAUSE_NONE       = 0,
  34         BIFROST_CLAUSE_LOAD_VARY  = 1,
  35         BIFROST_CLAUSE_UBO        = 2,
  36         BIFROST_CLAUSE_TEX        = 3,
  37         BIFROST_CLAUSE_SSBO_LOAD  = 5,
  38         BIFROST_CLAUSE_SSBO_STORE = 6,
  39         BIFROST_CLAUSE_BLEND      = 9,
  40         BIFROST_CLAUSE_ATEST      = 13,
  41         BIFROST_CLAUSE_64BIT      = 15
  42 };
  43
  44 struct bifrost_header {
  45         unsigned unk0 : 7;
  46         // If true, convert any infinite result of any floating-point operation to
  47         // the biggest representable number.
  48         unsigned suppress_inf: 1;
  49         // Convert any NaN results to 0.
  50         unsigned suppress_nan : 1;
  51         unsigned unk1 : 2;
  52         // true if the execution mask of the next clause is the same as the mask of
  53         // the current clause.
  54         unsigned back_to_back : 1;
  55         unsigned no_end_of_shader: 1;
  56         unsigned unk2 : 2;
  57         // Set to true for fragment shaders, to implement this bit of spec text
  58         // from section 7.1.5 of the GLSL ES spec:
  59         //
  60         // "Stores to image and buffer variables performed by helper invocations
  61         // have no effect on the underlying image or buffer memory."
  62         //
  63         // Helper invocations are threads (invocations) corresponding to pixels in
  64         // a quad that aren't actually part of the triangle, but are included to
  65         // make derivatives work correctly. They're usually turned on, but they
  66         // need to be masked off for GLSL-level stores. This bit seems to be the
  67         // only bit that's actually different between fragment shaders and other
  68         // shaders, so this is probably what it's doing.
  69         unsigned elide_writes : 1;
  70         // If backToBack is off:
  71         // - true for conditional branches and fallthrough
  72         // - false for unconditional branches
  73         // The blob seems to always set it to true if back-to-back is on.
  74         unsigned branch_cond : 1;
  75         // This bit is set when the next clause writes to the data register of some
  76         // previous clause.
  77         unsigned datareg_writebarrier: 1;
  78         unsigned datareg : 6;
  79         unsigned scoreboard_deps: 8;
  80         unsigned scoreboard_index: 3;
  81         enum bifrost_clause_type clause_type: 4;
  82         unsigned unk3 : 1; // part of clauseType?
  83         enum bifrost_clause_type next_clause_type: 4;
  84         unsigned unk4 : 1; // part of nextClauseType?
  85 } __attribute__((packed));
  86
  87 enum bifrost_packed_src {
  88         BIFROST_SRC_PORT0    = 0,
  89         BIFROST_SRC_PORT1    = 1,
  90         BIFROST_SRC_PORT3    = 2,
  91         BIFROST_SRC_STAGE    = 3,
  92         BIFROST_SRC_CONST_LO = 4,
  93         BIFROST_SRC_CONST_HI = 5,
  94         BIFROST_SRC_PASS_FMA = 6,
  95         BIFROST_SRC_PASS_ADD = 7,
  96 };
  97
  98 #define BIFROST_FMA_EXT (0xe0000)
  99 #define BIFROST_FMA_OP_MOV BIFROST_FMA_EXT | (0x32d)
 100 #define BIFROST_FMA_OP_FREXPE_LOG BIFROST_FMA_EXT | 0x3c5
 101 #define BIFROST_FMA_OP_ADD_FREXPM ((BIFROST_FMA_EXT | 0x1e80) >> 3)
 102
 103 struct bifrost_fma_inst {
 104         unsigned src0 : 3;
 105         unsigned op   : 20;
 106 } __attribute__((packed));
 107
 108 struct bifrost_fma_2src {
 109         unsigned src0 : 3;
 110         unsigned src1 : 3;
 111         unsigned op   : 17;
 112 } __attribute__((packed));
 113
 114 #define BIFROST_FMA_OP_MSCALE (0x50 >> 3)
 115
 116 struct bifrost_fma_mscale {
 117         unsigned src0 : 3;
 118         unsigned src1 : 3;
 119         unsigned src2 : 3;
 120         unsigned src3 : 3;
 121
 122         /* If mscale_mode is set - an MSCALE specific mode. If it is not set, a
 123          * regular outmod */
 124         unsigned mode : 2;
 125         unsigned mscale_mode : 1;
 126
 127         unsigned src0_abs : 1;
 128         unsigned src1_neg : 1;
 129         unsigned src2_neg : 1;
 130         unsigned op   : 5;
 131 } __attribute__((packed));
 132
 133 #define BIFROST_ADD_OP_BLEND (0x1952c)
 134 #define BIFROST_ADD_OP_FRCP_FAST_F32 (0x0cc00)
 135 #define BIFROST_ADD_OP_FRCP_FAST_F16_X (0x0ce10)
 136 #define BIFROST_ADD_OP_FRCP_FAST_F16_Y (0x0ce30)
 137 #define BIFROST_ADD_OP_FRSQ_FAST_F32 (0x0cc20)
 138 #define BIFROST_ADD_OP_FRSQ_FAST_F16_X (0x0ce50)
 139 #define BIFROST_ADD_OP_FRSQ_FAST_F16_Y (0x0ce70)
 140 #define BIFROST_ADD_OP_LOG2_HELP  (0x0cc68)
 141
 142 struct bifrost_add_inst {
 143         unsigned src0 : 3;
 144         unsigned op   : 17;
 145 } __attribute__((packed));
 146
 147 #define BIFROST_ADD_OP_LD_UBO_1 (0x0c1a0 >> 3)
 148 #define BIFROST_ADD_OP_LD_UBO_2 (0x0c1e0 >> 3)
 149 #define BIFROST_ADD_OP_LD_UBO_3 (0x0caa0 >> 3)
 150 #define BIFROST_ADD_OP_LD_UBO_4 (0x0c220 >> 3)
 151
 152 struct bifrost_add_2src {
 153         unsigned src0 : 3;
 154         unsigned src1 : 3;
 155         unsigned op   : 14;
 156 } __attribute__((packed));
 157
 158 #define BIFROST_ADD_OP_FMAX32 (0x00)
 159 #define BIFROST_ADD_OP_FMIN32 (0x01)
 160 #define BIFROST_ADD_OP_FADD32 (0x02)
 161
 162 struct bifrost_add_faddmin {
 163         unsigned src0 : 3;
 164         unsigned src1 : 3;
 165         unsigned src1_abs : 1;
 166         unsigned src0_neg : 1;
 167         unsigned src1_neg : 1;
 168         unsigned select : 2;
 169         unsigned outmod : 2;
 170         unsigned mode : 2;
 171         unsigned src0_abs : 1;
 172         unsigned op   : 4;
 173 } __attribute__((packed));
 174
 175 #define BIFROST_ADD_OP_ST_VAR (0x19300 >> 8)
 176
 177 struct bifrost_st_vary {
 178         unsigned src0 : 3;
 179         unsigned src1 : 3;
 180         unsigned src2 : 3;
 181         unsigned channels : 2;
 182         unsigned op   : 9;
 183 } __attribute__((packed));
 184
 185 #define BIFROST_ADD_OP_ATEST (0xc8f)
 186
 187 struct bifrost_add_atest {
 188         /* gl_SampleMask (R60) */
 189         unsigned src0 : 3;
 190
 191         /* Alpha value */
 192         unsigned src1 : 3;
 193
 194         /* If half, X/Y select. If !half, always set */
 195         unsigned component : 1;
 196         unsigned half : 1;
 197
 198         unsigned op   : 12;
 199 } __attribute__((packed));
 200
 201 enum bifrost_outmod {
 202         BIFROST_NONE = 0x0,
 203         BIFROST_POS = 0x1,
 204         BIFROST_SAT_SIGNED = 0x2,
 205         BIFROST_SAT = 0x3,
 206 };
 207
 208 enum bifrost_roundmode {
 209         BIFROST_RTE = 0x0, /* round to even */
 210         BIFROST_RTP = 0x1, /* round to positive */
 211         BIFROST_RTN = 0x2, /* round to negative */
 212         BIFROST_RTZ = 0x3 /* round to zero */
 213 };
 214
 215 /* NONE: Same as fmax() and fmin() -- return the other
 216  * number if any number is NaN.  Also always return +0 if
 217  * one argument is +0 and the other is -0.
 218  *
 219  * NAN_WINS: Instead of never returning a NaN, always return
 220  * one. The "greater"/"lesser" NaN is always returned, first
 221  * by checking the sign and then the mantissa bits.
 222  *
 223  * SRC1_WINS: For max, implement src0 > src1 ? src0 : src1.
 224  * For min, implement src0 < src1 ? src0 : src1.  This
 225  * includes handling NaN's and signedness of 0 differently
 226  * from above, since +0 and -0 compare equal and comparisons
 227  * always return false for NaN's. As a result, this mode is
 228  * *not* commutative.
 229  *
 230  * SRC0_WINS: For max, implement src0 < src1 ? src1 : src0
 231  * For min, implement src0 > src1 ? src1 : src0
 232  */
 233
 234
 235 enum bifrost_minmax_mode {
 236         BIFROST_MINMAX_NONE = 0x0,
 237         BIFROST_NAN_WINS    = 0x1,
 238         BIFROST_SRC1_WINS   = 0x2,
 239         BIFROST_SRC0_WINS   = 0x3,
 240 };
 241
 242 #define BIFROST_FMA_OP_FADD32 (0x58 >> 2)
 243 #define BIFROST_FMA_OP_FMAX32 (0x40 >> 2)
 244 #define BIFROST_FMA_OP_FMIN32 (0x44 >> 2)
 245
 246 struct bifrost_fma_add {
 247         unsigned src0 : 3;
 248         unsigned src1 : 3;
 249         unsigned src1_abs : 1;
 250         unsigned src0_neg : 1;
 251         unsigned src1_neg : 1;
 252         unsigned unk : 3;
 253         unsigned src0_abs : 1;
 254         enum bifrost_roundmode roundmode : 2;
 255         enum bifrost_outmod outmod : 2;
 256         unsigned op : 6;
 257 } __attribute__((packed));
 258
 259 #define BIFROST_FMA_OP_FMAX16 (0xC0 >> 2)
 260 #define BIFROST_FMA_OP_FMIN16 (0xCC >> 2)
 261 #define BIFROST_FMA_OP_FADD16 (0xD8 >> 2)
 262
 263 struct bifrost_fma_add_minmax16 {
 264         unsigned src0 : 3;
 265         unsigned src1 : 3;
 266         /* abs2 inferred as (src1 < src0) */
 267         unsigned abs1 : 1;
 268         unsigned src0_neg : 1;
 269         unsigned src1_neg : 1;
 270         unsigned src0_swizzle : 2;
 271         unsigned src1_swizzle : 2;
 272         unsigned mode : 2;
 273         enum bifrost_outmod outmod : 2;
 274         /* roundmode for add, min/max mode for min/max */
 275         unsigned op : 6;
 276 } __attribute__((packed));
 277
 278 #define BIFROST_FMA_OP_FMA (0x00)
 279
 280 struct bifrost_fma_fma {
 281         unsigned src0 : 3;
 282         unsigned src1 : 3;
 283         unsigned src2 : 3;
 284         unsigned src_expand : 3;
 285         unsigned src0_abs : 1;
 286         enum bifrost_roundmode roundmode : 2;
 287         enum bifrost_outmod outmod : 2;
 288         unsigned src0_neg : 1; /* 14 */
 289         unsigned src2_neg : 1;
 290         unsigned src1_abs : 1;
 291         unsigned src2_abs : 1; /* 17 */
 292         unsigned op : 2;
 293 } __attribute__((packed));
 294
 295 #define BIFROST_FMA_OP_FMA16 (0x2)
 296
 297 struct bifrost_fma_fma16 {
 298         unsigned src0 : 3;
 299         unsigned src1 : 3;
 300         unsigned src2 : 3;
 301         unsigned swizzle_0 : 2;
 302         unsigned swizzle_1 : 2;
 303         enum bifrost_roundmode roundmode : 2;
 304         enum bifrost_outmod outmod : 2;
 305         unsigned src0_neg : 1;
 306         unsigned src2_neg : 1;
 307         unsigned swizzle_2 : 2;
 308         unsigned op : 2;
 309 } __attribute__((packed));
 310
 311 enum bifrost_csel_cond {
 312         BIFROST_FEQ_F = 0x0,
 313         BIFROST_FGT_F = 0x1,
 314         BIFROST_FGE_F = 0x2,
 315         BIFROST_IEQ_F = 0x3,
 316         BIFROST_IGT_I = 0x4,
 317         BIFROST_IGE_I = 0x5,
 318         BIFROST_UGT_I = 0x6,
 319         BIFROST_UGE_I = 0x7
 320 };
 321
 322 #define BIFROST_FMA_OP_CSEL4     (0x5c)
 323 #define BIFROST_FMA_OP_CSEL4_V16 (0xdc)
 324
 325 struct bifrost_csel4 {
 326         unsigned src0 : 3;
 327         unsigned src1 : 3;
 328         unsigned src2 : 3;
 329         unsigned src3 : 3;
 330         enum bifrost_csel_cond cond : 3;
 331         unsigned op   : 8;
 332 } __attribute__((packed));
 333
 334 struct bifrost_shift_fma {
 335         unsigned src0 : 3;
 336         unsigned src1 : 3;
 337         unsigned src2 : 3;
 338         unsigned half : 3; /* 000 for i32, 100 for i8, 111 for v2i16 */
 339         unsigned unk  : 1; /* always set? */
 340         unsigned invert_1 : 1; /* Inverts sources to combining op */
 341         /* For XOR, switches RSHIFT to LSHIFT since only one invert needed */
 342         unsigned invert_2 : 1;
 343         unsigned op : 8;
 344 } __attribute__((packed));
 345
 346 struct bifrost_shift_add {
 347         unsigned src0 : 3;
 348         unsigned src1 : 3;
 349         unsigned src2 : 3;
 350         unsigned zero : 2;
 351
 352         unsigned invert_1 : 1;
 353         unsigned invert_2 : 1;
 354
 355         unsigned op : 7;
 356 } __attribute__((packed));
 357
 358 /* Two sources for vectorization */
 359 #define BIFROST_FMA_FLOAT32_TO_16 (0xdd000 >> 3)
 360 #define BIFROST_ADD_FLOAT32_TO_16 (0x0EC00 >> 3)
 361
 362 enum bifrost_convert_mode {
 363         BIFROST_CONV_UNK0 = 0,
 364         BIFROST_CONV_F32_TO_I32 = 1,
 365         BIFROST_CONV_F16_TO_I16 = 2,
 366         BIFROST_CONV_I32_TO_F32 = 3,
 367         BIFROST_CONV_I16_TO_X32 = 4,
 368         BIFROST_CONV_F16_TO_F32 = 5,
 369         BIFROST_CONV_I16_TO_F16 = 6,
 370         BIFROST_CONV_UNK7 = 7
 371 };
 372
 373 /* i16 to x32 */
 374 #define BIFROST_CONVERT_4(is_unsigned, component, to_float) \
 375         ((is_unsigned & 1) | ((component & 1) << 1) | ((to_float & 1) << 2) | \
 376          ((0x3) << 3) | ((4) << 5) | 0x100)
 377
 378 /* f16 to f32 */
 379 #define BIFROST_CONVERT_5(component) \
 380         ((component & 1) | ((1) << 1) | ((5) << 5) | 0x100)
 381
 382 /* Other conversions */
 383 #define BIFROST_CONVERT(is_unsigned, roundmode, swizzle, mode) \
 384         ((is_unsigned & 1) | ((roundmode & 3) << 1) | ((swizzle & 3) << 3) | ((mode & 7) << 5))
 385
 386 #define BIFROST_FMA_CONVERT (0xe0000)
 387 #define BIFROST_ADD_CONVERT (0x07800)
 388
 389 enum bifrost_ldst_type {
 390         BIFROST_LDST_F16 = 0,
 391         BIFROST_LDST_F32 = 1,
 392         BIFROST_LDST_I32 = 2,
 393         BIFROST_LDST_U32 = 3
 394 };
 395
 396 #define BIFROST_ADD_OP_LD_VAR_ADDR (0x18000 >> 10)
 397
 398 struct bifrost_ld_var_addr {
 399         unsigned src0 : 3;
 400         unsigned src1 : 3;
 401         unsigned location : 5;
 402         enum bifrost_ldst_type type : 2;
 403         unsigned op : 7;
 404 } __attribute__((packed));
 405
 406 #define BIFROST_ADD_OP_LD_ATTR (0x08000 >> 12)
 407
 408 struct bifrost_ld_attr {
 409         unsigned src0 : 3;
 410         unsigned src1 : 3;
 411         unsigned location : 5;
 412         unsigned channels : 2; /* MALI_POSITIVE */
 413         enum bifrost_ldst_type type : 2;
 414         unsigned op : 5;
 415 } __attribute__((packed));
 416
 417 enum bifrost_interp_mode {
 418         BIFROST_INTERP_PER_FRAG = 0x0,
 419         BIFROST_INTERP_CENTROID = 0x1,
 420         BIFROST_INTERP_DEFAULT  = 0x2,
 421         BIFROST_INTERP_EXPLICIT = 0x3
 422 };
 423
 424 #define BIFROST_ADD_OP_LD_VAR_16 (0x1a << 1)
 425 #define BIFROST_ADD_OP_LD_VAR_32 (0x0a << 1)
 426
 427 struct bifrost_ld_var {
 428         unsigned src0 : 3;
 429
 430         /* If top two bits set, indirect with src in bottom three */
 431         unsigned addr : 5;
 432
 433         unsigned channels : 2; /* MALI_POSITIVE */
 434         enum bifrost_interp_mode interp_mode : 2;
 435         unsigned reuse : 1;
 436         unsigned flat : 1;
 437         unsigned op : 6;
 438 } __attribute__((packed));
 439
 440 struct bifrost_tex_ctrl {
 441         unsigned sampler_index : 4; // also used to signal indirects
 442         unsigned tex_index : 7;
 443         bool no_merge_index : 1; // whether to merge (direct) sampler & texture indices
 444         bool filter : 1; // use the usual filtering pipeline (0 for texelFetch & textureGather)
 445         unsigned unk0 : 2;
 446         bool texel_offset : 1; // *Offset()
 447         bool is_shadow : 1;
 448         bool is_array : 1;
 449         unsigned tex_type : 2; // 2D, 3D, Cube, Buffer
 450         bool compute_lod : 1; // 0 for *Lod()
 451         bool not_supply_lod : 1; // 0 for *Lod() or when a bias is applied
 452         bool calc_gradients : 1; // 0 for *Grad()
 453         unsigned unk1 : 1;
 454         unsigned result_type : 4; // integer, unsigned, float TODO: why is this 4 bits?
 455         unsigned unk2 : 4;
 456 } __attribute__((packed));
 457
 458 struct bifrost_dual_tex_ctrl {
 459         unsigned sampler_index0 : 2;
 460         unsigned unk0 : 2;
 461         unsigned tex_index0 : 2;
 462         unsigned sampler_index1 : 2;
 463         unsigned tex_index1 : 2;
 464         unsigned unk1 : 22;
 465 } __attribute__((packed));
 466
 467 enum branch_bit_size {
 468         BR_SIZE_32 = 0,
 469         BR_SIZE_16XX = 1,
 470         BR_SIZE_16YY = 2,
 471         // For the above combinations of bitsize and location, an extra bit is
 472         // encoded via comparing the sources. The only possible source of ambiguity
 473         // would be if the sources were the same, but then the branch condition
 474         // would be always true or always false anyways, so we can ignore it. But
 475         // this no longer works when comparing the y component to the x component,
 476         // since it's valid to compare the y component of a source against its own
 477         // x component. Instead, the extra bit is encoded via an extra bitsize.
 478         BR_SIZE_16YX0 = 3,
 479         BR_SIZE_16YX1 = 4,
 480         BR_SIZE_32_AND_16X = 5,
 481         BR_SIZE_32_AND_16Y = 6,
 482         // Used for comparisons with zero and always-true, see below. I think this
 483         // only works for integer comparisons.
 484         BR_SIZE_ZERO = 7,
 485 };
 486
 487 enum bifrost_reg_write_unit {
 488         REG_WRITE_NONE = 0, // don't write
 489         REG_WRITE_TWO, // write using reg2
 490         REG_WRITE_THREE, // write using reg3
 491 };
 492
 493 struct bifrost_regs {
 494         unsigned uniform_const : 8;
 495         unsigned reg2 : 6;
 496         unsigned reg3 : 6;
 497         unsigned reg0 : 5;
 498         unsigned reg1 : 6;
 499         unsigned ctrl : 4;
 500 } __attribute__((packed));
 501
 502 enum bifrost_branch_cond {
 503         BR_COND_LT = 0,
 504         BR_COND_LE = 1,
 505         BR_COND_GE = 2,
 506         BR_COND_GT = 3,
 507         // Equal vs. not-equal determined by src0/src1 comparison
 508         BR_COND_EQ = 4,
 509         // floating-point comparisons
 510         // Becomes UNE when you flip the arguments
 511         BR_COND_OEQ = 5,
 512         // TODO what happens when you flip the arguments?
 513         BR_COND_OGT = 6,
 514         BR_COND_OLT = 7,
 515 };
 516
 517 enum bifrost_branch_code {
 518         BR_ALWAYS = 63,
 519 };
 520
 521 struct bifrost_branch {
 522         unsigned src0 : 3;
 523
 524         /* For BR_SIZE_ZERO, upper two bits become ctrl */
 525         unsigned src1 : 3;
 526
 527         /* Offset source -- always uniform/const but
 528          * theoretically could support indirect jumps? */
 529         unsigned src2 : 3;
 530
 531         enum bifrost_branch_cond cond : 3;
 532         enum branch_bit_size size : 3;
 533
 534         unsigned op : 5;
 535 };
 536
 537 /* Clause packing */
 538
 539 #define BIFROST_FMA_NOP (0x701960 | BIFROST_SRC_STAGE)
 540 #define BIFROST_ADD_NOP (0x3D960 | BIFROST_SRC_STAGE)
 541
 542 struct bifrost_fmt1 {
 543         unsigned ins_0 : 3;
 544         unsigned tag : 5;
 545         uint64_t ins_1 : 64;
 546         unsigned ins_2 : 11;
 547         uint64_t header : 45;
 548 } __attribute__((packed));
 549
 550 #define BIFROST_FMT1_INSTRUCTIONS    0b00101
 551 #define BIFROST_FMT1_FINAL           0b01001
 552 #define BIFROST_FMT1_CONSTANTS       0b00001
 553
 554 #define BIFROST_FMTC_CONSTANTS       0b0011
 555 #define BIFROST_FMTC_FINAL           0b0111
 556
 557 struct bifrost_fmt_constant {
 558         unsigned pos : 4;
 559         unsigned tag : 4;
 560         uint64_t imm_1 : 60;
 561         uint64_t imm_2 : 60;
 562 } __attribute__((packed));
 563
 564 enum bifrost_reg_control {
 565         BIFROST_WRITE_FMA_P2         = 1,
 566         BIFROST_WRITE_FMA_P2_READ_P3 = 2,
 567         BIFROST_FIRST_WRITE_FMA_P2_READ_P3 = 3,
 568         BIFROST_READ_P3              = 4,
 569         BIFROST_WRITE_ADD_P2         = 5,
 570         BIFROST_WRITE_ADD_P2_READ_P3 = 6,
 571         BIFROST_WRITE_ADD_P2_FMA_P3  = 7,
 572
 573         BIFROST_FIRST_NONE           = 8,
 574         BIFROST_FIRST_WRITE_FMA_P2   = 9,
 575         /* INSTR_INVALID_ENC */
 576         BIFROST_REG_NONE             = 11,
 577         BIFROST_FIRST_READ_P3        = 12,
 578         BIFROST_FIRST_WRITE_ADD_P2   = 13,
 579         BIFROST_FIRST_WRITE_ADD_P2_READ_P3 = 14,
 580         BIFROST_FIRST_WRITE_ADD_P2_FMA_P3  = 15
 581 };
 582
 583 #endif