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 #define BIFROST_DBG_MSGS        0x0001
  33 #define BIFROST_DBG_SHADERS     0x0002
  34
  35 extern int bifrost_debug;
  36
  37 enum bifrost_clause_type {
  38         BIFROST_CLAUSE_NONE       = 0,
  39         BIFROST_CLAUSE_LOAD_VARY  = 1,
  40         BIFROST_CLAUSE_UBO        = 2,
  41         BIFROST_CLAUSE_TEX        = 3,
  42         BIFROST_CLAUSE_SSBO_LOAD  = 5,
  43         BIFROST_CLAUSE_SSBO_STORE = 6,
  44         BIFROST_CLAUSE_BLEND      = 9,
  45         BIFROST_CLAUSE_FRAGZ      = 12,
  46         BIFROST_CLAUSE_ATEST      = 13,
  47         BIFROST_CLAUSE_64BIT      = 15
  48 };
  49
  50 struct bifrost_header {
  51         unsigned unk0 : 7;
  52         // If true, convert any infinite result of any floating-point operation to
  53         // the biggest representable number.
  54         unsigned suppress_inf: 1;
  55         // Convert any NaN results to 0.
  56         unsigned suppress_nan : 1;
  57         unsigned unk1 : 2;
  58         // true if the execution mask of the next clause is the same as the mask of
  59         // the current clause.
  60         unsigned back_to_back : 1;
  61         unsigned no_end_of_shader: 1;
  62         unsigned unk2 : 2;
  63         // Set to true for fragment shaders, to implement this bit of spec text
  64         // from section 7.1.5 of the GLSL ES spec:
  65         //
  66         // "Stores to image and buffer variables performed by helper invocations
  67         // have no effect on the underlying image or buffer memory."
  68         //
  69         // Helper invocations are threads (invocations) corresponding to pixels in
  70         // a quad that aren't actually part of the triangle, but are included to
  71         // make derivatives work correctly. They're usually turned on, but they
  72         // need to be masked off for GLSL-level stores. This bit seems to be the
  73         // only bit that's actually different between fragment shaders and other
  74         // shaders, so this is probably what it's doing.
  75         unsigned elide_writes : 1;
  76         // If backToBack is off:
  77         // - true for conditional branches and fallthrough
  78         // - false for unconditional branches
  79         // The blob seems to always set it to true if back-to-back is on.
  80         unsigned branch_cond : 1;
  81         // This bit is set when the next clause writes to the data register of some
  82         // previous clause.
  83         unsigned datareg_writebarrier: 1;
  84         unsigned datareg : 6;
  85         unsigned scoreboard_deps: 8;
  86         unsigned scoreboard_index: 3;
  87         enum bifrost_clause_type clause_type: 4;
  88         unsigned unk3 : 1; // part of clauseType?
  89         enum bifrost_clause_type next_clause_type: 4;
  90         unsigned unk4 : 1; // part of nextClauseType?
  91 } __attribute__((packed));
  92
  93 enum bifrost_packed_src {
  94         BIFROST_SRC_PORT0    = 0,
  95         BIFROST_SRC_PORT1    = 1,
  96         BIFROST_SRC_PORT3    = 2,
  97         BIFROST_SRC_STAGE    = 3,
  98         BIFROST_SRC_CONST_LO = 4,
  99         BIFROST_SRC_CONST_HI = 5,
 100         BIFROST_SRC_PASS_FMA = 6,
 101         BIFROST_SRC_PASS_ADD = 7,
 102 };
 103
 104 #define BIFROST_FMA_EXT (0xe0000)
 105 #define BIFROST_FMA_OP_MOV BIFROST_FMA_EXT | (0x32d)
 106 #define BIFROST_FMA_OP_FREXPE_LOG BIFROST_FMA_EXT | 0x3c5
 107 #define BIFROST_FMA_OP_ADD_FREXPM ((BIFROST_FMA_EXT | 0x1e80) >> 3)
 108 #define BIFROST_FMA_SEL_16(swiz) (((BIFROST_FMA_EXT | 0x1e00) >> 3) | (swiz))
 109
 110 #define BIFROST_FMA_ROUND_16(mode, swiz) (BIFROST_FMA_EXT | 0x1800 | (swiz) | ((mode) << 6))
 111 #define BIFROST_FMA_ROUND_32(mode) (BIFROST_FMA_EXT | 0x1805 | ((mode) << 6))
 112
 113 struct bifrost_fma_inst {
 114         unsigned src0 : 3;
 115         unsigned op   : 20;
 116 } __attribute__((packed));
 117
 118 #define BIFROST_FMA_IADD_32 (0x4ff98 >> 3)
 119 #define BIFROST_FMA_ISUB_32 (0x4ffd8 >> 3)
 120 #define BIFROST_FMA_IMUL_32 ((BIFROST_FMA_EXT | 0x7818) >> 3)
 121
 122 struct bifrost_fma_2src {
 123         unsigned src0 : 3;
 124         unsigned src1 : 3;
 125         unsigned op   : 17;
 126 } __attribute__((packed));
 127
 128 #define BIFROST_FMA_OP_SEL8 (0x71)
 129
 130 struct bifrost_fma_sel8 {
 131         unsigned src0 : 3;
 132         unsigned src1 : 3;
 133         unsigned src2 : 3;
 134         unsigned src3 : 3;
 135         unsigned swizzle : 4;
 136         unsigned op   : 7;
 137 } __attribute__((packed));
 138
 139 #define BIFROST_FMA_OP_MSCALE (0x50 >> 3)
 140
 141 struct bifrost_fma_mscale {
 142         unsigned src0 : 3;
 143         unsigned src1 : 3;
 144         unsigned src2 : 3;
 145         unsigned src3 : 3;
 146
 147         /* If mscale_mode is set - an MSCALE specific mode. If it is not set, a
 148          * regular outmod */
 149         unsigned mode : 2;
 150         unsigned mscale_mode : 1;
 151
 152         unsigned src0_abs : 1;
 153         unsigned src1_neg : 1;
 154         unsigned src2_neg : 1;
 155         unsigned op   : 5;
 156 } __attribute__((packed));
 157
 158 #define BIFROST_ADD_OP_BLEND (0x1952c)
 159 #define BIFROST_ADD_OP_FRCP_FAST_F32 (0x0cc00)
 160 #define BIFROST_ADD_OP_FRCP_FAST_F16_X (0x0ce10)
 161 #define BIFROST_ADD_OP_FRCP_FAST_F16_Y (0x0ce30)
 162 #define BIFROST_ADD_OP_FRSQ_FAST_F32 (0x0cc20)
 163 #define BIFROST_ADD_OP_FRSQ_FAST_F16_X (0x0ce50)
 164 #define BIFROST_ADD_OP_FRSQ_FAST_F16_Y (0x0ce70)
 165 #define BIFROST_ADD_OP_LOG2_HELP  (0x0cc68)
 166 #define BIFROST_ADD_OP_IABS_32 (0x07bd4)
 167
 168 struct bifrost_add_inst {
 169         unsigned src0 : 3;
 170         unsigned op   : 17;
 171 } __attribute__((packed));
 172
 173 #define BIFROST_ADD_OP_DISCARD (0x19100 >> 8)
 174
 175 enum bifrost_discard_cond {
 176         BIFROST_DISCARD_FEQ = 0,
 177         BIFROST_DISCARD_FNE = 1,
 178         BIFROST_DISCARD_FLE = 2,
 179         BIFROST_DISCARD_FLT = 3,
 180 };
 181
 182 struct bifrost_add_discard {
 183         unsigned src0 : 3;
 184         unsigned src1 : 3;
 185         enum bifrost_discard_cond cond : 2;
 186         /* Zero for fp32 */
 187         unsigned src0_select : 1;
 188         unsigned src1_select : 1;
 189         unsigned fp32 : 1;
 190         unsigned op   : 9;
 191 } __attribute__((packed));
 192
 193 #define BIFROST_ADD_OP_LD_UBO_1 (0x0c1a0 >> 3)
 194 #define BIFROST_ADD_OP_LD_UBO_2 (0x0c1e0 >> 3)
 195 #define BIFROST_ADD_OP_LD_UBO_3 (0x0caa0 >> 3)
 196 #define BIFROST_ADD_OP_LD_UBO_4 (0x0c220 >> 3)
 197 #define BIFROST_ADD_SEL_16(swiz) ((0xea60 >> 3) | (swiz))
 198
 199 #define BIFROST_ADD_IADD_8  (0x17880 >> 3)
 200 #define BIFROST_ADD_IADD_16 (0x17900 >> 3)
 201 #define BIFROST_ADD_IADD_32 (0x178c0 >> 3)
 202 #define BIFROST_ADD_ISUB_8  (0x17a80 >> 3)
 203 #define BIFROST_ADD_ISUB_16 (0x17b00 >> 3)
 204 #define BIFROST_ADD_ISUB_32 (0x17ac0 >> 3)
 205 #define BIFROST_ADD_OP_FEXP2_FAST (0x0cd58 >> 3)
 206
 207 struct bifrost_add_2src {
 208         unsigned src0 : 3;
 209         unsigned src1 : 3;
 210         unsigned op   : 14;
 211 } __attribute__((packed));
 212
 213 #define BIFROST_ADD_OP_FMAX32 (0x00)
 214 #define BIFROST_ADD_OP_FMIN32 (0x01)
 215 #define BIFROST_ADD_OP_FADD32 (0x02)
 216
 217 #define BIFROST_ADD_OP_FADD16 (0x0A)
 218
 219 struct bifrost_add_faddmin {
 220         unsigned src0 : 3;
 221         unsigned src1 : 3;
 222         unsigned src1_abs : 1;
 223         unsigned src0_neg : 1;
 224         unsigned src1_neg : 1;
 225         unsigned select : 2; /* swizzle_0 for fp16 */
 226         unsigned outmod : 2; /* swizzle_1 for fp16 */
 227         unsigned mode : 2;
 228         unsigned src0_abs : 1;
 229         unsigned op   : 4;
 230 } __attribute__((packed));
 231
 232 #define BIFROST_ADD_OP_FMAX16 (0x10)
 233 #define BIFROST_ADD_OP_FMIN16 (0x12)
 234
 235 struct bifrost_add_fmin16 {
 236         unsigned src0 : 3;
 237         unsigned src1 : 3;
 238         /* abs2 inferred as with FMA */
 239         unsigned abs1 : 1;
 240         unsigned src0_neg : 1;
 241         unsigned src1_neg : 1;
 242         unsigned src0_swizzle : 2;
 243         unsigned src1_swizzle : 2;
 244         unsigned mode : 2;
 245         unsigned op : 5;
 246 } __attribute__((packed));
 247
 248 #define BIFROST_ADD_OP_ST_VAR (0x19300 >> 8)
 249
 250 struct bifrost_st_vary {
 251         unsigned src0 : 3;
 252         unsigned src1 : 3;
 253         unsigned src2 : 3;
 254         unsigned channels : 2;
 255         unsigned op   : 9;
 256 } __attribute__((packed));
 257
 258 #define BIFROST_ADD_OP_ATEST (0xc8f)
 259
 260 struct bifrost_add_atest {
 261         /* gl_SampleMask (R60) */
 262         unsigned src0 : 3;
 263
 264         /* Alpha value */
 265         unsigned src1 : 3;
 266
 267         /* If half, X/Y select. If !half, always set */
 268         unsigned component : 1;
 269         unsigned half : 1;
 270
 271         unsigned op   : 12;
 272 } __attribute__((packed));
 273
 274 enum bifrost_outmod {
 275         BIFROST_NONE = 0x0,
 276         BIFROST_POS = 0x1,
 277         BIFROST_SAT_SIGNED = 0x2,
 278         BIFROST_SAT = 0x3,
 279 };
 280
 281 enum bifrost_roundmode {
 282         BIFROST_RTE = 0x0, /* round to even */
 283         BIFROST_RTP = 0x1, /* round to positive */
 284         BIFROST_RTN = 0x2, /* round to negative */
 285         BIFROST_RTZ = 0x3 /* round to zero */
 286 };
 287
 288 /* NONE: Same as fmax() and fmin() -- return the other
 289  * number if any number is NaN.  Also always return +0 if
 290  * one argument is +0 and the other is -0.
 291  *
 292  * NAN_WINS: Instead of never returning a NaN, always return
 293  * one. The "greater"/"lesser" NaN is always returned, first
 294  * by checking the sign and then the mantissa bits.
 295  *
 296  * SRC1_WINS: For max, implement src0 > src1 ? src0 : src1.
 297  * For min, implement src0 < src1 ? src0 : src1.  This
 298  * includes handling NaN's and signedness of 0 differently
 299  * from above, since +0 and -0 compare equal and comparisons
 300  * always return false for NaN's. As a result, this mode is
 301  * *not* commutative.
 302  *
 303  * SRC0_WINS: For max, implement src0 < src1 ? src1 : src0
 304  * For min, implement src0 > src1 ? src1 : src0
 305  */
 306
 307
 308 enum bifrost_minmax_mode {
 309         BIFROST_MINMAX_NONE = 0x0,
 310         BIFROST_NAN_WINS    = 0x1,
 311         BIFROST_SRC1_WINS   = 0x2,
 312         BIFROST_SRC0_WINS   = 0x3,
 313 };
 314
 315 #define BIFROST_FMA_OP_FADD32 (0x58 >> 2)
 316 #define BIFROST_FMA_OP_FMAX32 (0x40 >> 2)
 317 #define BIFROST_FMA_OP_FMIN32 (0x44 >> 2)
 318
 319 struct bifrost_fma_add {
 320         unsigned src0 : 3;
 321         unsigned src1 : 3;
 322         unsigned src1_abs : 1;
 323         unsigned src0_neg : 1;
 324         unsigned src1_neg : 1;
 325         unsigned unk : 3;
 326         unsigned src0_abs : 1;
 327         enum bifrost_roundmode roundmode : 2;
 328         enum bifrost_outmod outmod : 2;
 329         unsigned op : 6;
 330 } __attribute__((packed));
 331
 332 #define BIFROST_FMA_OP_FMAX16 (0xC0 >> 2)
 333 #define BIFROST_FMA_OP_FMIN16 (0xCC >> 2)
 334 #define BIFROST_FMA_OP_FADD16 (0xD8 >> 2)
 335
 336 struct bifrost_fma_add_minmax16 {
 337         unsigned src0 : 3;
 338         unsigned src1 : 3;
 339         /* abs2 inferred as (src1 < src0) */
 340         unsigned abs1 : 1;
 341         unsigned src0_neg : 1;
 342         unsigned src1_neg : 1;
 343         unsigned src0_swizzle : 2;
 344         unsigned src1_swizzle : 2;
 345         unsigned mode : 2;
 346         enum bifrost_outmod outmod : 2;
 347         /* roundmode for add, min/max mode for min/max */
 348         unsigned op : 6;
 349 } __attribute__((packed));
 350
 351 #define BIFROST_FMA_OP_FMA (0x00)
 352
 353 struct bifrost_fma_fma {
 354         unsigned src0 : 3;
 355         unsigned src1 : 3;
 356         unsigned src2 : 3;
 357         unsigned src_expand : 3;
 358         unsigned src0_abs : 1;
 359         enum bifrost_roundmode roundmode : 2;
 360         enum bifrost_outmod outmod : 2;
 361         unsigned src0_neg : 1; /* 14 */
 362         unsigned src2_neg : 1;
 363         unsigned src1_abs : 1;
 364         unsigned src2_abs : 1; /* 17 */
 365         unsigned op : 2;
 366 } __attribute__((packed));
 367
 368 #define BIFROST_FMA_OP_FMA16 (0x2)
 369
 370 struct bifrost_fma_fma16 {
 371         unsigned src0 : 3;
 372         unsigned src1 : 3;
 373         unsigned src2 : 3;
 374         unsigned swizzle_0 : 2;
 375         unsigned swizzle_1 : 2;
 376         enum bifrost_roundmode roundmode : 2;
 377         enum bifrost_outmod outmod : 2;
 378         unsigned src0_neg : 1;
 379         unsigned src2_neg : 1;
 380         unsigned swizzle_2 : 2;
 381         unsigned op : 2;
 382 } __attribute__((packed));
 383
 384 enum bifrost_csel_cond {
 385         BIFROST_FEQ_F = 0x0,
 386         BIFROST_FGT_F = 0x1,
 387         BIFROST_FGE_F = 0x2,
 388         BIFROST_IEQ_F = 0x3,
 389         BIFROST_IGT_I = 0x4,
 390         BIFROST_IGE_I = 0x5,
 391         BIFROST_UGT_I = 0x6,
 392         BIFROST_UGE_I = 0x7
 393 };
 394
 395 #define BIFROST_FMA_OP_CSEL4     (0x5c)
 396 #define BIFROST_FMA_OP_CSEL4_V16 (0xdc)
 397
 398 struct bifrost_csel4 {
 399         unsigned src0 : 3;
 400         unsigned src1 : 3;
 401         unsigned src2 : 3;
 402         unsigned src3 : 3;
 403         enum bifrost_csel_cond cond : 3;
 404         unsigned op   : 8;
 405 } __attribute__((packed));
 406
 407 #define BIFROST_FMA_OP_RSHIFT_NAND     (0x60000 >> 12)
 408 #define BIFROST_FMA_OP_RSHIFT_AND      (0x61000 >> 12)
 409 #define BIFROST_FMA_OP_LSHIFT_NAND     (0x62000 >> 12)
 410 #define BIFROST_FMA_OP_LSHIFT_AND      (0x63000 >> 12)
 411 #define BIFROST_FMA_OP_RSHIFT_XOR      (0x64000 >> 12)
 412 #define BIFROST_FMA_OP_LSHIFT_ADD_32   (0x65200 >> 6)
 413 #define BIFROST_FMA_OP_LSHIFT_SUB_32   (0x65600 >> 6)
 414 #define BIFROST_FMA_OP_LSHIFT_RSUB_32  (0x65a00 >> 6)
 415 #define BIFROST_FMA_OP_RSHIFT_ADD_32   (0x65e00 >> 6)
 416 #define BIFROST_FMA_OP_RSHIFT_SUB_32   (0x66200 >> 6)
 417 #define BIFROST_FMA_OP_RSHIFT_RSUB_32  (0x66600 >> 6)
 418
 419 struct bifrost_shift_fma {
 420         unsigned src0 : 3;
 421         unsigned src1 : 3;
 422         unsigned src2 : 3;
 423         unsigned half : 3;
 424         unsigned unk  : 1; /* always set? */
 425         unsigned invert_1 : 1; /* Inverts sources to combining op */
 426         /* For XOR, switches RSHIFT to LSHIFT since only one invert needed */
 427         unsigned invert_2 : 1;
 428         unsigned op : 8;
 429 } __attribute__((packed));
 430
 431 struct bifrost_shift_add {
 432         unsigned src0 : 3;
 433         unsigned src1 : 3;
 434         unsigned src2 : 3;
 435         unsigned zero : 2;
 436
 437         unsigned invert_1 : 1;
 438         unsigned invert_2 : 1;
 439
 440         unsigned op : 7;
 441 } __attribute__((packed));
 442
 443 enum bifrost_fcmp_cond {
 444         BIFROST_OEQ = 0,
 445         BIFROST_OGT = 1,
 446         BIFROST_OGE = 2,
 447         BIFROST_UNE = 3,
 448         BIFROST_OLT = 4,
 449         BIFROST_OLE = 5,
 450 };
 451
 452 /* "gl" version produces 0/1. "d3d" version produces 0/~0 */
 453 #define BIFROST_FMA_OP_FCMP_GL (0x48000 >> 13)
 454 #define BIFROST_FMA_OP_FCMP_D3D (0x4c000 >> 13)
 455
 456 struct bifrost_fma_fcmp {
 457         unsigned src0 : 3;
 458         unsigned src1 : 3;
 459         unsigned src1_abs : 1;
 460         unsigned unk1 : 1;
 461         unsigned src1_neg : 1;
 462         unsigned src_expand : 3;
 463         unsigned src0_abs : 1;
 464         enum bifrost_fcmp_cond cond : 3;
 465         unsigned op   : 7;
 466 } __attribute__((packed));
 467
 468 struct bifrost_add_fcmp {
 469         unsigned src0 : 3;
 470         unsigned src1 : 3;
 471         enum bifrost_fcmp_cond cond : 3;
 472         unsigned src_expand : 2;
 473         unsigned src0_abs : 1;
 474         unsigned src1_abs : 1;
 475         unsigned src1_neg : 1;
 476         unsigned op   : 6;
 477 } __attribute__((packed));
 478
 479 /* "gl" version produces 0/1. "d3d" version produces 0/~0 */
 480 #define BIFROST_FMA_OP_FCMP_GL_16 (0xc8000 >> 13)
 481 #define BIFROST_FMA_OP_FCMP_D3D_16 (0xcc000 >> 13)
 482
 483 struct bifrost_fma_fcmp16 {
 484         unsigned src0 : 3;
 485         unsigned src1 : 3;
 486
 487         /* abs2 inferred */
 488         unsigned abs1 : 1;
 489         unsigned unk : 2;
 490
 491         unsigned src0_swizzle : 2;
 492         unsigned src1_swizzle : 2;
 493
 494         enum bifrost_fcmp_cond cond : 3;
 495         unsigned op   : 7;
 496 } __attribute__((packed));
 497
 498 struct bifrost_add_fcmp16 {
 499         unsigned src0 : 3;
 500         unsigned src1 : 3;
 501         enum bifrost_fcmp_cond cond : 3;
 502
 503         unsigned src0_swizzle : 2;
 504         unsigned src1_swizzle : 2;
 505
 506         /* No abs mods */
 507         unsigned src0_neg : 1;
 508
 509         unsigned op   : 6;
 510 } __attribute__((packed));
 511
 512 enum bifrost_icmp_cond {
 513         BIFROST_ICMP_IGT = 0,
 514         BIFROST_ICMP_IGE = 1, /* swapped for 16-bit */
 515         BIFROST_ICMP_UGT = 2, /* swapped for 16-bit */
 516         BIFROST_ICMP_UGE = 3,
 517         BIFROST_ICMP_EQ  = 4,
 518         BIFROST_ICMP_NEQ  = 5,
 519         BIFROST_ICMP_32_OR_8 = 6, /* nested */
 520         BIFROST_ICMP_64 = 7, /* nested */
 521 };
 522
 523 struct bifrost_fma_icmp32 {
 524         unsigned src0 : 3;
 525         unsigned src1 : 3;
 526         enum bifrost_icmp_cond cond : 3;
 527         unsigned unk1 : 1; /* set */
 528         unsigned d3d : 1;  /* if set, true is ~0. otherwise, true is 1 */
 529         unsigned op : 12;
 530 } __attribute__((packed));
 531
 532 struct bifrost_fma_icmp16 {
 533         unsigned src0 : 3;
 534         unsigned src1 : 3;
 535         unsigned unk : 5; /* 11010 */
 536         enum bifrost_icmp_cond cond : 3;
 537         unsigned op : 9;
 538 } __attribute__((packed));
 539
 540 #define BIFROST_ADD_OP_ICMP_32 (0x0f600 >> 8)
 541 #define BIFROST_ADD_OP_ICMP_16 (0x0f000 >> 11)
 542
 543 struct bifrost_add_icmp {
 544         unsigned src0 : 3;
 545         unsigned src1 : 3;
 546         enum bifrost_icmp_cond cond : 3;
 547         unsigned sz : 1; /* 1 for 32, 0 for 8 */
 548         unsigned d3d : 1; /* if set, true is ~0. otherwise, true is 1 */
 549         unsigned op : 9;
 550 } __attribute__((packed));
 551
 552 struct bifrost_add_icmp16 {
 553         unsigned src0 : 3;
 554         unsigned src1 : 3;
 555         unsigned src0_swizzle : 2;
 556         unsigned src1_swizzle : 2;
 557         unsigned d3d : 1; /* if set, true is ~0. otherwise, true is 1 */
 558         enum bifrost_icmp_cond cond : 3;
 559         unsigned op : 6;
 560 } __attribute__((packed));
 561
 562 /* Two sources for vectorization */
 563 #define BIFROST_FMA_FLOAT32_TO_16 (0xdd000 >> 3)
 564 #define BIFROST_ADD_FLOAT32_TO_16 (0x0EC00 >> 3)
 565
 566 enum bifrost_convert_mode {
 567         BIFROST_CONV_UNK0 = 0,
 568         BIFROST_CONV_F32_TO_I32 = 1,
 569         BIFROST_CONV_F16_TO_I16 = 2,
 570         BIFROST_CONV_I32_TO_F32 = 3,
 571         BIFROST_CONV_I16_TO_X32 = 4,
 572         BIFROST_CONV_F16_TO_F32 = 5,
 573         BIFROST_CONV_I16_TO_F16 = 6,
 574         BIFROST_CONV_UNK7 = 7
 575 };
 576
 577 /* i16 to x32 */
 578 #define BIFROST_CONVERT_4(is_unsigned, component, to_float) \
 579         ((is_unsigned & 1) | ((component & 1) << 1) | ((to_float & 1) << 2) | \
 580          ((0x3) << 3) | ((4) << 5) | 0x100)
 581
 582 /* f16 to f32 */
 583 #define BIFROST_CONVERT_5(component) \
 584         ((component & 1) | ((1) << 1) | ((5) << 5) | 0x100)
 585
 586 /* Other conversions */
 587 #define BIFROST_CONVERT(is_unsigned, roundmode, swizzle, mode) \
 588         ((is_unsigned & 1) | ((roundmode & 3) << 1) | ((swizzle & 3) << 3) | ((mode & 7) << 5))
 589
 590 #define BIFROST_FMA_CONVERT (0xe0000)
 591 #define BIFROST_ADD_CONVERT (0x07800)
 592
 593 enum bifrost_ldst_type {
 594         BIFROST_LDST_F16 = 0,
 595         BIFROST_LDST_F32 = 1,
 596         BIFROST_LDST_I32 = 2,
 597         BIFROST_LDST_U32 = 3
 598 };
 599
 600 #define BIFROST_ADD_OP_LD_VAR_ADDR (0x18000 >> 10)
 601
 602 struct bifrost_ld_var_addr {
 603         unsigned src0 : 3;
 604         unsigned src1 : 3;
 605         unsigned location : 5;
 606         enum bifrost_ldst_type type : 2;
 607         unsigned op : 7;
 608 } __attribute__((packed));
 609
 610 #define BIFROST_ADD_OP_LD_ATTR (0x08000 >> 12)
 611
 612 struct bifrost_ld_attr {
 613         unsigned src0 : 3;
 614         unsigned src1 : 3;
 615         unsigned location : 5;
 616         unsigned channels : 2; /* MALI_POSITIVE */
 617         enum bifrost_ldst_type type : 2;
 618         unsigned op : 5;
 619 } __attribute__((packed));
 620
 621 enum bifrost_interp_mode {
 622         BIFROST_INTERP_PER_FRAG = 0x0,
 623         BIFROST_INTERP_CENTROID = 0x1,
 624         BIFROST_INTERP_DEFAULT  = 0x2,
 625         BIFROST_INTERP_EXPLICIT = 0x3
 626 };
 627
 628 #define BIFROST_ADD_OP_LD_VAR_16 (0x1a << 1)
 629 #define BIFROST_ADD_OP_LD_VAR_32 (0x0a << 1)
 630
 631 /* Fixed location for gl_FragCoord.zw */
 632 #define BIFROST_FRAGZ (23)
 633 #define BIFROST_FRAGW (22)
 634
 635 struct bifrost_ld_var {
 636         unsigned src0 : 3;
 637
 638         /* If top two bits set, indirect with src in bottom three */
 639         unsigned addr : 5;
 640
 641         unsigned channels : 2; /* MALI_POSITIVE */
 642         enum bifrost_interp_mode interp_mode : 2;
 643         unsigned reuse : 1;
 644         unsigned flat : 1;
 645         unsigned op : 6;
 646 } __attribute__((packed));
 647
 648 struct bifrost_tex_ctrl {
 649         unsigned sampler_index : 4; // also used to signal indirects
 650         unsigned tex_index : 7;
 651         bool no_merge_index : 1; // whether to merge (direct) sampler & texture indices
 652         bool filter : 1; // use the usual filtering pipeline (0 for texelFetch & textureGather)
 653         unsigned unk0 : 2;
 654         bool texel_offset : 1; // *Offset()
 655         bool is_shadow : 1;
 656         bool is_array : 1;
 657         unsigned tex_type : 2; // 2D, 3D, Cube, Buffer
 658         bool compute_lod : 1; // 0 for *Lod()
 659         bool not_supply_lod : 1; // 0 for *Lod() or when a bias is applied
 660         bool calc_gradients : 1; // 0 for *Grad()
 661         unsigned unk1 : 1;
 662         unsigned result_type : 4; // integer, unsigned, float TODO: why is this 4 bits?
 663         unsigned unk2 : 4;
 664 } __attribute__((packed));
 665
 666 struct bifrost_dual_tex_ctrl {
 667         unsigned sampler_index0 : 2;
 668         unsigned unk0 : 2;
 669         unsigned tex_index0 : 2;
 670         unsigned sampler_index1 : 2;
 671         unsigned tex_index1 : 2;
 672         unsigned unk1 : 22;
 673 } __attribute__((packed));
 674
 675 #define BIFROST_ADD_OP_TEX_COMPACT_F32(vtx) ((0x0b000 | ((vtx) ? (0x400) : (0))) >> 10)
 676 #define BIFROST_ADD_OP_TEX_COMPACT_F16(vtx) ((0x1b000 | ((vtx) ? (0x400) : (0))) >> 10)
 677
 678 struct bifrost_tex_compact {
 679         unsigned src0 : 3;
 680         unsigned src1 : 3;
 681         unsigned tex_index : 3;
 682         unsigned compute_lod : 1;
 683         unsigned sampler_index : 3;
 684         unsigned op   : 7;
 685 } __attribute__((packed));
 686
 687 enum branch_bit_size {
 688         BR_SIZE_32 = 0,
 689         BR_SIZE_16XX = 1,
 690         BR_SIZE_16YY = 2,
 691         // For the above combinations of bitsize and location, an extra bit is
 692         // encoded via comparing the sources. The only possible source of ambiguity
 693         // would be if the sources were the same, but then the branch condition
 694         // would be always true or always false anyways, so we can ignore it. But
 695         // this no longer works when comparing the y component to the x component,
 696         // since it's valid to compare the y component of a source against its own
 697         // x component. Instead, the extra bit is encoded via an extra bitsize.
 698         BR_SIZE_16YX0 = 3,
 699         BR_SIZE_16YX1 = 4,
 700         BR_SIZE_32_AND_16X = 5,
 701         BR_SIZE_32_AND_16Y = 6,
 702         // Used for comparisons with zero and always-true, see below. I think this
 703         // only works for integer comparisons.
 704         BR_SIZE_ZERO = 7,
 705 };
 706
 707 enum bifrost_reg_write_unit {
 708         REG_WRITE_NONE = 0, // don't write
 709         REG_WRITE_TWO, // write using reg2
 710         REG_WRITE_THREE, // write using reg3
 711 };
 712
 713 struct bifrost_regs {
 714         unsigned uniform_const : 8;
 715         unsigned reg2 : 6;
 716         unsigned reg3 : 6;
 717         unsigned reg0 : 5;
 718         unsigned reg1 : 6;
 719         unsigned ctrl : 4;
 720 } __attribute__((packed));
 721
 722 enum bifrost_branch_cond {
 723         BR_COND_LT = 0,
 724         BR_COND_LE = 1,
 725         BR_COND_GE = 2,
 726         BR_COND_GT = 3,
 727         // Equal vs. not-equal determined by src0/src1 comparison
 728         BR_COND_EQ = 4,
 729         // floating-point comparisons
 730         // Becomes UNE when you flip the arguments
 731         BR_COND_OEQ = 5,
 732         // TODO what happens when you flip the arguments?
 733         BR_COND_OGT = 6,
 734         BR_COND_OLT = 7,
 735 };
 736
 737 enum bifrost_branch_code {
 738         BR_ALWAYS = 63,
 739 };
 740
 741 #define BIFROST_ADD_OP_BRANCH (0x0d000 >> 12)
 742
 743 struct bifrost_branch {
 744         unsigned src0 : 3;
 745
 746         /* For BR_SIZE_ZERO, upper two bits become ctrl */
 747         unsigned src1 : 3;
 748
 749         /* Offset source -- always uniform/const but
 750          * theoretically could support indirect jumps? */
 751         unsigned src2 : 3;
 752
 753         enum bifrost_branch_cond cond : 3;
 754         enum branch_bit_size size : 3;
 755
 756         unsigned op : 5;
 757 };
 758
 759 /* Clause packing */
 760
 761 #define BIFROST_FMA_NOP (0x701960 | BIFROST_SRC_STAGE)
 762 #define BIFROST_ADD_NOP (0x3D960 | BIFROST_SRC_STAGE)
 763
 764 struct bifrost_fmt1 {
 765         unsigned ins_0 : 3;
 766         unsigned tag : 5;
 767         uint64_t ins_1 : 64;
 768         unsigned ins_2 : 11;
 769         uint64_t header : 45;
 770 } __attribute__((packed));
 771
 772 #define BIFROST_FMT1_INSTRUCTIONS    0b00101
 773 #define BIFROST_FMT1_FINAL           0b01001
 774 #define BIFROST_FMT1_CONSTANTS       0b00001
 775
 776 #define BIFROST_FMTC_CONSTANTS       0b0011
 777 #define BIFROST_FMTC_FINAL           0b0111
 778
 779 struct bifrost_fmt_constant {
 780         unsigned pos : 4;
 781         unsigned tag : 4;
 782         uint64_t imm_1 : 60;
 783         uint64_t imm_2 : 60;
 784 } __attribute__((packed));
 785
 786 enum bifrost_reg_control {
 787         BIFROST_WRITE_FMA_P2         = 1,
 788         BIFROST_WRITE_FMA_P2_READ_P3 = 2,
 789         BIFROST_FIRST_WRITE_FMA_P2_READ_P3 = 3,
 790         BIFROST_READ_P3              = 4,
 791         BIFROST_WRITE_ADD_P2         = 5,
 792         BIFROST_WRITE_ADD_P2_READ_P3 = 6,
 793         BIFROST_WRITE_ADD_P2_FMA_P3  = 7,
 794
 795         BIFROST_FIRST_NONE           = 8,
 796         BIFROST_FIRST_WRITE_FMA_P2   = 9,
 797         /* INSTR_INVALID_ENC */
 798         BIFROST_REG_NONE             = 11,
 799         BIFROST_FIRST_READ_P3        = 12,
 800         BIFROST_FIRST_WRITE_ADD_P2   = 13,
 801         BIFROST_FIRST_WRITE_ADD_P2_READ_P3 = 14,
 802         BIFROST_FIRST_WRITE_ADD_P2_FMA_P3  = 15
 803 };
 804
 805 #endif