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_FEXP2_FAST (0x0cd58)
 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
 206 struct bifrost_add_2src {
 207         unsigned src0 : 3;
 208         unsigned src1 : 3;
 209         unsigned op   : 14;
 210 } __attribute__((packed));
 211
 212 #define BIFROST_ADD_OP_FMAX32 (0x00)
 213 #define BIFROST_ADD_OP_FMIN32 (0x01)
 214 #define BIFROST_ADD_OP_FADD32 (0x02)
 215
 216 #define BIFROST_ADD_OP_FADD16 (0x0A)
 217
 218 struct bifrost_add_faddmin {
 219         unsigned src0 : 3;
 220         unsigned src1 : 3;
 221         unsigned src1_abs : 1;
 222         unsigned src0_neg : 1;
 223         unsigned src1_neg : 1;
 224         unsigned select : 2; /* swizzle_0 for fp16 */
 225         unsigned outmod : 2; /* swizzle_1 for fp16 */
 226         unsigned mode : 2;
 227         unsigned src0_abs : 1;
 228         unsigned op   : 4;
 229 } __attribute__((packed));
 230
 231 #define BIFROST_ADD_OP_FMAX16 (0x10)
 232 #define BIFROST_ADD_OP_FMIN16 (0x12)
 233
 234 struct bifrost_add_fmin16 {
 235         unsigned src0 : 3;
 236         unsigned src1 : 3;
 237         /* abs2 inferred as with FMA */
 238         unsigned abs1 : 1;
 239         unsigned src0_neg : 1;
 240         unsigned src1_neg : 1;
 241         unsigned src0_swizzle : 2;
 242         unsigned src1_swizzle : 2;
 243         unsigned mode : 2;
 244         unsigned op : 5;
 245 } __attribute__((packed));
 246
 247 #define BIFROST_ADD_OP_ST_VAR (0x19300 >> 8)
 248
 249 struct bifrost_st_vary {
 250         unsigned src0 : 3;
 251         unsigned src1 : 3;
 252         unsigned src2 : 3;
 253         unsigned channels : 2;
 254         unsigned op   : 9;
 255 } __attribute__((packed));
 256
 257 #define BIFROST_ADD_OP_ATEST (0xc8f)
 258
 259 struct bifrost_add_atest {
 260         /* gl_SampleMask (R60) */
 261         unsigned src0 : 3;
 262
 263         /* Alpha value */
 264         unsigned src1 : 3;
 265
 266         /* If half, X/Y select. If !half, always set */
 267         unsigned component : 1;
 268         unsigned half : 1;
 269
 270         unsigned op   : 12;
 271 } __attribute__((packed));
 272
 273 enum bifrost_outmod {
 274         BIFROST_NONE = 0x0,
 275         BIFROST_POS = 0x1,
 276         BIFROST_SAT_SIGNED = 0x2,
 277         BIFROST_SAT = 0x3,
 278 };
 279
 280 enum bifrost_roundmode {
 281         BIFROST_RTE = 0x0, /* round to even */
 282         BIFROST_RTP = 0x1, /* round to positive */
 283         BIFROST_RTN = 0x2, /* round to negative */
 284         BIFROST_RTZ = 0x3 /* round to zero */
 285 };
 286
 287 /* NONE: Same as fmax() and fmin() -- return the other
 288  * number if any number is NaN.  Also always return +0 if
 289  * one argument is +0 and the other is -0.
 290  *
 291  * NAN_WINS: Instead of never returning a NaN, always return
 292  * one. The "greater"/"lesser" NaN is always returned, first
 293  * by checking the sign and then the mantissa bits.
 294  *
 295  * SRC1_WINS: For max, implement src0 > src1 ? src0 : src1.
 296  * For min, implement src0 < src1 ? src0 : src1.  This
 297  * includes handling NaN's and signedness of 0 differently
 298  * from above, since +0 and -0 compare equal and comparisons
 299  * always return false for NaN's. As a result, this mode is
 300  * *not* commutative.
 301  *
 302  * SRC0_WINS: For max, implement src0 < src1 ? src1 : src0
 303  * For min, implement src0 > src1 ? src1 : src0
 304  */
 305
 306
 307 enum bifrost_minmax_mode {
 308         BIFROST_MINMAX_NONE = 0x0,
 309         BIFROST_NAN_WINS    = 0x1,
 310         BIFROST_SRC1_WINS   = 0x2,
 311         BIFROST_SRC0_WINS   = 0x3,
 312 };
 313
 314 #define BIFROST_FMA_OP_FADD32 (0x58 >> 2)
 315 #define BIFROST_FMA_OP_FMAX32 (0x40 >> 2)
 316 #define BIFROST_FMA_OP_FMIN32 (0x44 >> 2)
 317
 318 struct bifrost_fma_add {
 319         unsigned src0 : 3;
 320         unsigned src1 : 3;
 321         unsigned src1_abs : 1;
 322         unsigned src0_neg : 1;
 323         unsigned src1_neg : 1;
 324         unsigned unk : 3;
 325         unsigned src0_abs : 1;
 326         enum bifrost_roundmode roundmode : 2;
 327         enum bifrost_outmod outmod : 2;
 328         unsigned op : 6;
 329 } __attribute__((packed));
 330
 331 #define BIFROST_FMA_OP_FMAX16 (0xC0 >> 2)
 332 #define BIFROST_FMA_OP_FMIN16 (0xCC >> 2)
 333 #define BIFROST_FMA_OP_FADD16 (0xD8 >> 2)
 334
 335 struct bifrost_fma_add_minmax16 {
 336         unsigned src0 : 3;
 337         unsigned src1 : 3;
 338         /* abs2 inferred as (src1 < src0) */
 339         unsigned abs1 : 1;
 340         unsigned src0_neg : 1;
 341         unsigned src1_neg : 1;
 342         unsigned src0_swizzle : 2;
 343         unsigned src1_swizzle : 2;
 344         unsigned mode : 2;
 345         enum bifrost_outmod outmod : 2;
 346         /* roundmode for add, min/max mode for min/max */
 347         unsigned op : 6;
 348 } __attribute__((packed));
 349
 350 #define BIFROST_FMA_OP_FMA (0x00)
 351
 352 struct bifrost_fma_fma {
 353         unsigned src0 : 3;
 354         unsigned src1 : 3;
 355         unsigned src2 : 3;
 356         unsigned src_expand : 3;
 357         unsigned src0_abs : 1;
 358         enum bifrost_roundmode roundmode : 2;
 359         enum bifrost_outmod outmod : 2;
 360         unsigned src0_neg : 1; /* 14 */
 361         unsigned src2_neg : 1;
 362         unsigned src1_abs : 1;
 363         unsigned src2_abs : 1; /* 17 */
 364         unsigned op : 2;
 365 } __attribute__((packed));
 366
 367 #define BIFROST_FMA_OP_FMA16 (0x2)
 368
 369 struct bifrost_fma_fma16 {
 370         unsigned src0 : 3;
 371         unsigned src1 : 3;
 372         unsigned src2 : 3;
 373         unsigned swizzle_0 : 2;
 374         unsigned swizzle_1 : 2;
 375         enum bifrost_roundmode roundmode : 2;
 376         enum bifrost_outmod outmod : 2;
 377         unsigned src0_neg : 1;
 378         unsigned src2_neg : 1;
 379         unsigned swizzle_2 : 2;
 380         unsigned op : 2;
 381 } __attribute__((packed));
 382
 383 enum bifrost_csel_cond {
 384         BIFROST_FEQ_F = 0x0,
 385         BIFROST_FGT_F = 0x1,
 386         BIFROST_FGE_F = 0x2,
 387         BIFROST_IEQ_F = 0x3,
 388         BIFROST_IGT_I = 0x4,
 389         BIFROST_IGE_I = 0x5,
 390         BIFROST_UGT_I = 0x6,
 391         BIFROST_UGE_I = 0x7
 392 };
 393
 394 #define BIFROST_FMA_OP_CSEL4     (0x5c)
 395 #define BIFROST_FMA_OP_CSEL4_V16 (0xdc)
 396
 397 struct bifrost_csel4 {
 398         unsigned src0 : 3;
 399         unsigned src1 : 3;
 400         unsigned src2 : 3;
 401         unsigned src3 : 3;
 402         enum bifrost_csel_cond cond : 3;
 403         unsigned op   : 8;
 404 } __attribute__((packed));
 405
 406 #define BIFROST_FMA_OP_RSHIFT_NAND     (0x60000 >> 12)
 407 #define BIFROST_FMA_OP_RSHIFT_AND      (0x61000 >> 12)
 408 #define BIFROST_FMA_OP_LSHIFT_NAND     (0x62000 >> 12)
 409 #define BIFROST_FMA_OP_LSHIFT_AND      (0x63000 >> 12)
 410 #define BIFROST_FMA_OP_RSHIFT_XOR      (0x64000 >> 12)
 411 #define BIFROST_FMA_OP_LSHIFT_ADD_32   (0x65200 >> 6)
 412 #define BIFROST_FMA_OP_LSHIFT_SUB_32   (0x65600 >> 6)
 413 #define BIFROST_FMA_OP_LSHIFT_RSUB_32  (0x65a00 >> 6)
 414 #define BIFROST_FMA_OP_RSHIFT_ADD_32   (0x65e00 >> 6)
 415 #define BIFROST_FMA_OP_RSHIFT_SUB_32   (0x66200 >> 6)
 416 #define BIFROST_FMA_OP_RSHIFT_RSUB_32  (0x66600 >> 6)
 417
 418 struct bifrost_shift_fma {
 419         unsigned src0 : 3;
 420         unsigned src1 : 3;
 421         unsigned src2 : 3;
 422         unsigned half : 3;
 423         unsigned unk  : 1; /* always set? */
 424         unsigned invert_1 : 1; /* Inverts sources to combining op */
 425         /* For XOR, switches RSHIFT to LSHIFT since only one invert needed */
 426         unsigned invert_2 : 1;
 427         unsigned op : 8;
 428 } __attribute__((packed));
 429
 430 struct bifrost_shift_add {
 431         unsigned src0 : 3;
 432         unsigned src1 : 3;
 433         unsigned src2 : 3;
 434         unsigned zero : 2;
 435
 436         unsigned invert_1 : 1;
 437         unsigned invert_2 : 1;
 438
 439         unsigned op : 7;
 440 } __attribute__((packed));
 441
 442 enum bifrost_fcmp_cond {
 443         BIFROST_OEQ = 0,
 444         BIFROST_OGT = 1,
 445         BIFROST_OGE = 2,
 446         BIFROST_UNE = 3,
 447         BIFROST_OLT = 4,
 448         BIFROST_OLE = 5,
 449 };
 450
 451 /* "gl" version produces 0/1. "d3d" version produces 0/~0 */
 452 #define BIFROST_FMA_OP_FCMP_GL (0x48000 >> 13)
 453 #define BIFROST_FMA_OP_FCMP_D3D (0x4c000 >> 13)
 454
 455 struct bifrost_fma_fcmp {
 456         unsigned src0 : 3;
 457         unsigned src1 : 3;
 458         unsigned src1_abs : 1;
 459         unsigned unk1 : 1;
 460         unsigned src1_neg : 1;
 461         unsigned src_expand : 3;
 462         unsigned src0_abs : 1;
 463         enum bifrost_fcmp_cond cond : 3;
 464         unsigned op   : 7;
 465 } __attribute__((packed));
 466
 467 struct bifrost_add_fcmp {
 468         unsigned src0 : 3;
 469         unsigned src1 : 3;
 470         enum bifrost_fcmp_cond cond : 3;
 471         unsigned src_expand : 2;
 472         unsigned src0_abs : 1;
 473         unsigned src1_abs : 1;
 474         unsigned src1_neg : 1;
 475         unsigned op   : 6;
 476 } __attribute__((packed));
 477
 478 /* "gl" version produces 0/1. "d3d" version produces 0/~0 */
 479 #define BIFROST_FMA_OP_FCMP_GL_16 (0xc8000 >> 13)
 480 #define BIFROST_FMA_OP_FCMP_D3D_16 (0xcc000 >> 13)
 481
 482 struct bifrost_fma_fcmp16 {
 483         unsigned src0 : 3;
 484         unsigned src1 : 3;
 485
 486         /* abs2 inferred */
 487         unsigned abs1 : 1;
 488         unsigned unk : 2;
 489
 490         unsigned src0_swizzle : 2;
 491         unsigned src1_swizzle : 2;
 492
 493         enum bifrost_fcmp_cond cond : 3;
 494         unsigned op   : 7;
 495 } __attribute__((packed));
 496
 497 struct bifrost_add_fcmp16 {
 498         unsigned src0 : 3;
 499         unsigned src1 : 3;
 500         enum bifrost_fcmp_cond cond : 3;
 501
 502         unsigned src0_swizzle : 2;
 503         unsigned src1_swizzle : 2;
 504
 505         /* No abs mods */
 506         unsigned src0_neg : 1;
 507
 508         unsigned op   : 6;
 509 } __attribute__((packed));
 510
 511 enum bifrost_icmp_cond {
 512         BIFROST_ICMP_IGT = 0,
 513         BIFROST_ICMP_IGE = 1, /* swapped for 16-bit */
 514         BIFROST_ICMP_UGT = 2, /* swapped for 16-bit */
 515         BIFROST_ICMP_UGE = 3,
 516         BIFROST_ICMP_EQ  = 4,
 517         BIFROST_ICMP_NEQ  = 5,
 518         BIFROST_ICMP_32_OR_8 = 6, /* nested */
 519         BIFROST_ICMP_64 = 7, /* nested */
 520 };
 521
 522 struct bifrost_fma_icmp32 {
 523         unsigned src0 : 3;
 524         unsigned src1 : 3;
 525         enum bifrost_icmp_cond cond : 3;
 526         unsigned unk1 : 1; /* set */
 527         unsigned d3d : 1;  /* if set, true is ~0. otherwise, true is 1 */
 528         unsigned op : 12;
 529 } __attribute__((packed));
 530
 531 struct bifrost_fma_icmp16 {
 532         unsigned src0 : 3;
 533         unsigned src1 : 3;
 534         unsigned unk : 5; /* 11010 */
 535         enum bifrost_icmp_cond cond : 3;
 536         unsigned op : 9;
 537 } __attribute__((packed));
 538
 539 #define BIFROST_ADD_OP_ICMP_32 (0x0f600 >> 8)
 540 #define BIFROST_ADD_OP_ICMP_16 (0x0f000 >> 11)
 541
 542 struct bifrost_add_icmp {
 543         unsigned src0 : 3;
 544         unsigned src1 : 3;
 545         enum bifrost_icmp_cond cond : 3;
 546         unsigned sz : 1; /* 1 for 32, 0 for 8 */
 547         unsigned d3d : 1; /* if set, true is ~0. otherwise, true is 1 */
 548         unsigned op : 9;
 549 } __attribute__((packed));
 550
 551 struct bifrost_add_icmp16 {
 552         unsigned src0 : 3;
 553         unsigned src1 : 3;
 554         unsigned src0_swizzle : 2;
 555         unsigned src1_swizzle : 2;
 556         unsigned d3d : 1; /* if set, true is ~0. otherwise, true is 1 */
 557         enum bifrost_icmp_cond cond : 3;
 558         unsigned op : 6;
 559 } __attribute__((packed));
 560
 561 /* Two sources for vectorization */
 562 #define BIFROST_FMA_FLOAT32_TO_16 (0xdd000 >> 3)
 563 #define BIFROST_ADD_FLOAT32_TO_16 (0x0EC00 >> 3)
 564
 565 enum bifrost_convert_mode {
 566         BIFROST_CONV_UNK0 = 0,
 567         BIFROST_CONV_F32_TO_I32 = 1,
 568         BIFROST_CONV_F16_TO_I16 = 2,
 569         BIFROST_CONV_I32_TO_F32 = 3,
 570         BIFROST_CONV_I16_TO_X32 = 4,
 571         BIFROST_CONV_F16_TO_F32 = 5,
 572         BIFROST_CONV_I16_TO_F16 = 6,
 573         BIFROST_CONV_UNK7 = 7
 574 };
 575
 576 /* i16 to x32 */
 577 #define BIFROST_CONVERT_4(is_unsigned, component, to_float) \
 578         ((is_unsigned & 1) | ((component & 1) << 1) | ((to_float & 1) << 2) | \
 579          ((0x3) << 3) | ((4) << 5) | 0x100)
 580
 581 /* f16 to f32 */
 582 #define BIFROST_CONVERT_5(component) \
 583         ((component & 1) | ((1) << 1) | ((5) << 5) | 0x100)
 584
 585 /* Other conversions */
 586 #define BIFROST_CONVERT(is_unsigned, roundmode, swizzle, mode) \
 587         ((is_unsigned & 1) | ((roundmode & 3) << 1) | ((swizzle & 3) << 3) | ((mode & 7) << 5))
 588
 589 #define BIFROST_FMA_CONVERT (0xe0000)
 590 #define BIFROST_ADD_CONVERT (0x07800)
 591
 592 enum bifrost_ldst_type {
 593         BIFROST_LDST_F16 = 0,
 594         BIFROST_LDST_F32 = 1,
 595         BIFROST_LDST_I32 = 2,
 596         BIFROST_LDST_U32 = 3
 597 };
 598
 599 #define BIFROST_ADD_OP_LD_VAR_ADDR (0x18000 >> 10)
 600
 601 struct bifrost_ld_var_addr {
 602         unsigned src0 : 3;
 603         unsigned src1 : 3;
 604         unsigned location : 5;
 605         enum bifrost_ldst_type type : 2;
 606         unsigned op : 7;
 607 } __attribute__((packed));
 608
 609 #define BIFROST_ADD_OP_LD_ATTR (0x08000 >> 12)
 610
 611 struct bifrost_ld_attr {
 612         unsigned src0 : 3;
 613         unsigned src1 : 3;
 614         unsigned location : 5;
 615         unsigned channels : 2; /* MALI_POSITIVE */
 616         enum bifrost_ldst_type type : 2;
 617         unsigned op : 5;
 618 } __attribute__((packed));
 619
 620 enum bifrost_interp_mode {
 621         BIFROST_INTERP_PER_FRAG = 0x0,
 622         BIFROST_INTERP_CENTROID = 0x1,
 623         BIFROST_INTERP_DEFAULT  = 0x2,
 624         BIFROST_INTERP_EXPLICIT = 0x3
 625 };
 626
 627 #define BIFROST_ADD_OP_LD_VAR_16 (0x1a << 1)
 628 #define BIFROST_ADD_OP_LD_VAR_32 (0x0a << 1)
 629
 630 /* Fixed location for gl_FragCoord.zw */
 631 #define BIFROST_FRAGZ (23)
 632 #define BIFROST_FRAGW (22)
 633
 634 struct bifrost_ld_var {
 635         unsigned src0 : 3;
 636
 637         /* If top two bits set, indirect with src in bottom three */
 638         unsigned addr : 5;
 639
 640         unsigned channels : 2; /* MALI_POSITIVE */
 641         enum bifrost_interp_mode interp_mode : 2;
 642         unsigned reuse : 1;
 643         unsigned flat : 1;
 644         unsigned op : 6;
 645 } __attribute__((packed));
 646
 647 struct bifrost_tex_ctrl {
 648         unsigned sampler_index : 4; // also used to signal indirects
 649         unsigned tex_index : 7;
 650         bool no_merge_index : 1; // whether to merge (direct) sampler & texture indices
 651         bool filter : 1; // use the usual filtering pipeline (0 for texelFetch & textureGather)
 652         unsigned unk0 : 2;
 653         bool texel_offset : 1; // *Offset()
 654         bool is_shadow : 1;
 655         bool is_array : 1;
 656         unsigned tex_type : 2; // 2D, 3D, Cube, Buffer
 657         bool compute_lod : 1; // 0 for *Lod()
 658         bool not_supply_lod : 1; // 0 for *Lod() or when a bias is applied
 659         bool calc_gradients : 1; // 0 for *Grad()
 660         unsigned unk1 : 1;
 661         unsigned result_type : 4; // integer, unsigned, float TODO: why is this 4 bits?
 662         unsigned unk2 : 4;
 663 } __attribute__((packed));
 664
 665 struct bifrost_dual_tex_ctrl {
 666         unsigned sampler_index0 : 2;
 667         unsigned unk0 : 2;
 668         unsigned tex_index0 : 2;
 669         unsigned sampler_index1 : 2;
 670         unsigned tex_index1 : 2;
 671         unsigned unk1 : 22;
 672 } __attribute__((packed));
 673
 674 #define BIFROST_ADD_OP_TEX_COMPACT_F32(vtx) ((0x0b000 | ((vtx) ? (0x400) : (0))) >> 10)
 675 #define BIFROST_ADD_OP_TEX_COMPACT_F16(vtx) ((0x1b000 | ((vtx) ? (0x400) : (0))) >> 10)
 676
 677 struct bifrost_tex_compact {
 678         unsigned src0 : 3;
 679         unsigned src1 : 3;
 680         unsigned tex_index : 3;
 681         unsigned compute_lod : 1;
 682         unsigned sampler_index : 3;
 683         unsigned op   : 7;
 684 } __attribute__((packed));
 685
 686 enum branch_bit_size {
 687         BR_SIZE_32 = 0,
 688         BR_SIZE_16XX = 1,
 689         BR_SIZE_16YY = 2,
 690         // For the above combinations of bitsize and location, an extra bit is
 691         // encoded via comparing the sources. The only possible source of ambiguity
 692         // would be if the sources were the same, but then the branch condition
 693         // would be always true or always false anyways, so we can ignore it. But
 694         // this no longer works when comparing the y component to the x component,
 695         // since it's valid to compare the y component of a source against its own
 696         // x component. Instead, the extra bit is encoded via an extra bitsize.
 697         BR_SIZE_16YX0 = 3,
 698         BR_SIZE_16YX1 = 4,
 699         BR_SIZE_32_AND_16X = 5,
 700         BR_SIZE_32_AND_16Y = 6,
 701         // Used for comparisons with zero and always-true, see below. I think this
 702         // only works for integer comparisons.
 703         BR_SIZE_ZERO = 7,
 704 };
 705
 706 enum bifrost_reg_write_unit {
 707         REG_WRITE_NONE = 0, // don't write
 708         REG_WRITE_TWO, // write using reg2
 709         REG_WRITE_THREE, // write using reg3
 710 };
 711
 712 struct bifrost_regs {
 713         unsigned uniform_const : 8;
 714         unsigned reg2 : 6;
 715         unsigned reg3 : 6;
 716         unsigned reg0 : 5;
 717         unsigned reg1 : 6;
 718         unsigned ctrl : 4;
 719 } __attribute__((packed));
 720
 721 enum bifrost_branch_cond {
 722         BR_COND_LT = 0,
 723         BR_COND_LE = 1,
 724         BR_COND_GE = 2,
 725         BR_COND_GT = 3,
 726         // Equal vs. not-equal determined by src0/src1 comparison
 727         BR_COND_EQ = 4,
 728         // floating-point comparisons
 729         // Becomes UNE when you flip the arguments
 730         BR_COND_OEQ = 5,
 731         // TODO what happens when you flip the arguments?
 732         BR_COND_OGT = 6,
 733         BR_COND_OLT = 7,
 734 };
 735
 736 enum bifrost_branch_code {
 737         BR_ALWAYS = 63,
 738 };
 739
 740 #define BIFROST_ADD_OP_BRANCH (0x0d000 >> 12)
 741
 742 struct bifrost_branch {
 743         unsigned src0 : 3;
 744
 745         /* For BR_SIZE_ZERO, upper two bits become ctrl */
 746         unsigned src1 : 3;
 747
 748         /* Offset source -- always uniform/const but
 749          * theoretically could support indirect jumps? */
 750         unsigned src2 : 3;
 751
 752         enum bifrost_branch_cond cond : 3;
 753         enum branch_bit_size size : 3;
 754
 755         unsigned op : 5;
 756 };
 757
 758 /* Clause packing */
 759
 760 #define BIFROST_FMA_NOP (0x701960 | BIFROST_SRC_STAGE)
 761 #define BIFROST_ADD_NOP (0x3D960 | BIFROST_SRC_STAGE)
 762
 763 struct bifrost_fmt1 {
 764         unsigned ins_0 : 3;
 765         unsigned tag : 5;
 766         uint64_t ins_1 : 64;
 767         unsigned ins_2 : 11;
 768         uint64_t header : 45;
 769 } __attribute__((packed));
 770
 771 #define BIFROST_FMT1_INSTRUCTIONS    0b00101
 772 #define BIFROST_FMT1_FINAL           0b01001
 773 #define BIFROST_FMT1_CONSTANTS       0b00001
 774
 775 #define BIFROST_FMTC_CONSTANTS       0b0011
 776 #define BIFROST_FMTC_FINAL           0b0111
 777
 778 struct bifrost_fmt_constant {
 779         unsigned pos : 4;
 780         unsigned tag : 4;
 781         uint64_t imm_1 : 60;
 782         uint64_t imm_2 : 60;
 783 } __attribute__((packed));
 784
 785 enum bifrost_reg_control {
 786         BIFROST_WRITE_FMA_P2         = 1,
 787         BIFROST_WRITE_FMA_P2_READ_P3 = 2,
 788         BIFROST_FIRST_WRITE_FMA_P2_READ_P3 = 3,
 789         BIFROST_READ_P3              = 4,
 790         BIFROST_WRITE_ADD_P2         = 5,
 791         BIFROST_WRITE_ADD_P2_READ_P3 = 6,
 792         BIFROST_WRITE_ADD_P2_FMA_P3  = 7,
 793
 794         BIFROST_FIRST_NONE           = 8,
 795         BIFROST_FIRST_WRITE_FMA_P2   = 9,
 796         /* INSTR_INVALID_ENC */
 797         BIFROST_REG_NONE             = 11,
 798         BIFROST_FIRST_READ_P3        = 12,
 799         BIFROST_FIRST_WRITE_ADD_P2   = 13,
 800         BIFROST_FIRST_WRITE_ADD_P2_READ_P3 = 14,
 801         BIFROST_FIRST_WRITE_ADD_P2_FMA_P3  = 15
 802 };
 803
 804 #endif