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 struct bifrost_fma_2src {
 119         unsigned src0 : 3;
 120         unsigned src1 : 3;
 121         unsigned op   : 17;
 122 } __attribute__((packed));
 123
 124 #define BIFROST_FMA_OP_SEL8 (0x71)
 125
 126 struct bifrost_fma_sel8 {
 127         unsigned src0 : 3;
 128         unsigned src1 : 3;
 129         unsigned src2 : 3;
 130         unsigned src3 : 3;
 131         unsigned swizzle : 4;
 132         unsigned op   : 7;
 133 } __attribute__((packed));
 134
 135 #define BIFROST_FMA_OP_MSCALE (0x50 >> 3)
 136
 137 struct bifrost_fma_mscale {
 138         unsigned src0 : 3;
 139         unsigned src1 : 3;
 140         unsigned src2 : 3;
 141         unsigned src3 : 3;
 142
 143         /* If mscale_mode is set - an MSCALE specific mode. If it is not set, a
 144          * regular outmod */
 145         unsigned mode : 2;
 146         unsigned mscale_mode : 1;
 147
 148         unsigned src0_abs : 1;
 149         unsigned src1_neg : 1;
 150         unsigned src2_neg : 1;
 151         unsigned op   : 5;
 152 } __attribute__((packed));
 153
 154 #define BIFROST_ADD_OP_BLEND (0x1952c)
 155 #define BIFROST_ADD_OP_FRCP_FAST_F32 (0x0cc00)
 156 #define BIFROST_ADD_OP_FRCP_FAST_F16_X (0x0ce10)
 157 #define BIFROST_ADD_OP_FRCP_FAST_F16_Y (0x0ce30)
 158 #define BIFROST_ADD_OP_FRSQ_FAST_F32 (0x0cc20)
 159 #define BIFROST_ADD_OP_FRSQ_FAST_F16_X (0x0ce50)
 160 #define BIFROST_ADD_OP_FRSQ_FAST_F16_Y (0x0ce70)
 161 #define BIFROST_ADD_OP_LOG2_HELP  (0x0cc68)
 162 #define BIFROST_ADD_OP_FEXP2_FAST (0x0cd58)
 163
 164 struct bifrost_add_inst {
 165         unsigned src0 : 3;
 166         unsigned op   : 17;
 167 } __attribute__((packed));
 168
 169 #define BIFROST_ADD_OP_LD_UBO_1 (0x0c1a0 >> 3)
 170 #define BIFROST_ADD_OP_LD_UBO_2 (0x0c1e0 >> 3)
 171 #define BIFROST_ADD_OP_LD_UBO_3 (0x0caa0 >> 3)
 172 #define BIFROST_ADD_OP_LD_UBO_4 (0x0c220 >> 3)
 173 #define BIFROST_ADD_SEL_16(swiz) ((0xea60 >> 3) | (swiz))
 174
 175 struct bifrost_add_2src {
 176         unsigned src0 : 3;
 177         unsigned src1 : 3;
 178         unsigned op   : 14;
 179 } __attribute__((packed));
 180
 181 #define BIFROST_ADD_OP_FMAX32 (0x00)
 182 #define BIFROST_ADD_OP_FMIN32 (0x01)
 183 #define BIFROST_ADD_OP_FADD32 (0x02)
 184
 185 #define BIFROST_ADD_OP_FADD16 (0x0A)
 186
 187 struct bifrost_add_faddmin {
 188         unsigned src0 : 3;
 189         unsigned src1 : 3;
 190         unsigned src1_abs : 1;
 191         unsigned src0_neg : 1;
 192         unsigned src1_neg : 1;
 193         unsigned select : 2; /* swizzle_0 for fp16 */
 194         unsigned outmod : 2; /* swizzle_1 for fp16 */
 195         unsigned mode : 2;
 196         unsigned src0_abs : 1;
 197         unsigned op   : 4;
 198 } __attribute__((packed));
 199
 200 #define BIFROST_ADD_OP_FMAX16 (0x10)
 201 #define BIFROST_ADD_OP_FMIN16 (0x12)
 202
 203 struct bifrost_add_fmin16 {
 204         unsigned src0 : 3;
 205         unsigned src1 : 3;
 206         /* abs2 inferred as with FMA */
 207         unsigned abs1 : 1;
 208         unsigned src0_neg : 1;
 209         unsigned src1_neg : 1;
 210         unsigned src0_swizzle : 2;
 211         unsigned src1_swizzle : 2;
 212         unsigned mode : 2;
 213         unsigned op : 5;
 214 } __attribute__((packed));
 215
 216 #define BIFROST_ADD_OP_ST_VAR (0x19300 >> 8)
 217
 218 struct bifrost_st_vary {
 219         unsigned src0 : 3;
 220         unsigned src1 : 3;
 221         unsigned src2 : 3;
 222         unsigned channels : 2;
 223         unsigned op   : 9;
 224 } __attribute__((packed));
 225
 226 #define BIFROST_ADD_OP_ATEST (0xc8f)
 227
 228 struct bifrost_add_atest {
 229         /* gl_SampleMask (R60) */
 230         unsigned src0 : 3;
 231
 232         /* Alpha value */
 233         unsigned src1 : 3;
 234
 235         /* If half, X/Y select. If !half, always set */
 236         unsigned component : 1;
 237         unsigned half : 1;
 238
 239         unsigned op   : 12;
 240 } __attribute__((packed));
 241
 242 enum bifrost_outmod {
 243         BIFROST_NONE = 0x0,
 244         BIFROST_POS = 0x1,
 245         BIFROST_SAT_SIGNED = 0x2,
 246         BIFROST_SAT = 0x3,
 247 };
 248
 249 enum bifrost_roundmode {
 250         BIFROST_RTE = 0x0, /* round to even */
 251         BIFROST_RTP = 0x1, /* round to positive */
 252         BIFROST_RTN = 0x2, /* round to negative */
 253         BIFROST_RTZ = 0x3 /* round to zero */
 254 };
 255
 256 /* NONE: Same as fmax() and fmin() -- return the other
 257  * number if any number is NaN.  Also always return +0 if
 258  * one argument is +0 and the other is -0.
 259  *
 260  * NAN_WINS: Instead of never returning a NaN, always return
 261  * one. The "greater"/"lesser" NaN is always returned, first
 262  * by checking the sign and then the mantissa bits.
 263  *
 264  * SRC1_WINS: For max, implement src0 > src1 ? src0 : src1.
 265  * For min, implement src0 < src1 ? src0 : src1.  This
 266  * includes handling NaN's and signedness of 0 differently
 267  * from above, since +0 and -0 compare equal and comparisons
 268  * always return false for NaN's. As a result, this mode is
 269  * *not* commutative.
 270  *
 271  * SRC0_WINS: For max, implement src0 < src1 ? src1 : src0
 272  * For min, implement src0 > src1 ? src1 : src0
 273  */
 274
 275
 276 enum bifrost_minmax_mode {
 277         BIFROST_MINMAX_NONE = 0x0,
 278         BIFROST_NAN_WINS    = 0x1,
 279         BIFROST_SRC1_WINS   = 0x2,
 280         BIFROST_SRC0_WINS   = 0x3,
 281 };
 282
 283 #define BIFROST_FMA_OP_FADD32 (0x58 >> 2)
 284 #define BIFROST_FMA_OP_FMAX32 (0x40 >> 2)
 285 #define BIFROST_FMA_OP_FMIN32 (0x44 >> 2)
 286
 287 struct bifrost_fma_add {
 288         unsigned src0 : 3;
 289         unsigned src1 : 3;
 290         unsigned src1_abs : 1;
 291         unsigned src0_neg : 1;
 292         unsigned src1_neg : 1;
 293         unsigned unk : 3;
 294         unsigned src0_abs : 1;
 295         enum bifrost_roundmode roundmode : 2;
 296         enum bifrost_outmod outmod : 2;
 297         unsigned op : 6;
 298 } __attribute__((packed));
 299
 300 #define BIFROST_FMA_OP_FMAX16 (0xC0 >> 2)
 301 #define BIFROST_FMA_OP_FMIN16 (0xCC >> 2)
 302 #define BIFROST_FMA_OP_FADD16 (0xD8 >> 2)
 303
 304 struct bifrost_fma_add_minmax16 {
 305         unsigned src0 : 3;
 306         unsigned src1 : 3;
 307         /* abs2 inferred as (src1 < src0) */
 308         unsigned abs1 : 1;
 309         unsigned src0_neg : 1;
 310         unsigned src1_neg : 1;
 311         unsigned src0_swizzle : 2;
 312         unsigned src1_swizzle : 2;
 313         unsigned mode : 2;
 314         enum bifrost_outmod outmod : 2;
 315         /* roundmode for add, min/max mode for min/max */
 316         unsigned op : 6;
 317 } __attribute__((packed));
 318
 319 #define BIFROST_FMA_OP_FMA (0x00)
 320
 321 struct bifrost_fma_fma {
 322         unsigned src0 : 3;
 323         unsigned src1 : 3;
 324         unsigned src2 : 3;
 325         unsigned src_expand : 3;
 326         unsigned src0_abs : 1;
 327         enum bifrost_roundmode roundmode : 2;
 328         enum bifrost_outmod outmod : 2;
 329         unsigned src0_neg : 1; /* 14 */
 330         unsigned src2_neg : 1;
 331         unsigned src1_abs : 1;
 332         unsigned src2_abs : 1; /* 17 */
 333         unsigned op : 2;
 334 } __attribute__((packed));
 335
 336 #define BIFROST_FMA_OP_FMA16 (0x2)
 337
 338 struct bifrost_fma_fma16 {
 339         unsigned src0 : 3;
 340         unsigned src1 : 3;
 341         unsigned src2 : 3;
 342         unsigned swizzle_0 : 2;
 343         unsigned swizzle_1 : 2;
 344         enum bifrost_roundmode roundmode : 2;
 345         enum bifrost_outmod outmod : 2;
 346         unsigned src0_neg : 1;
 347         unsigned src2_neg : 1;
 348         unsigned swizzle_2 : 2;
 349         unsigned op : 2;
 350 } __attribute__((packed));
 351
 352 enum bifrost_csel_cond {
 353         BIFROST_FEQ_F = 0x0,
 354         BIFROST_FGT_F = 0x1,
 355         BIFROST_FGE_F = 0x2,
 356         BIFROST_IEQ_F = 0x3,
 357         BIFROST_IGT_I = 0x4,
 358         BIFROST_IGE_I = 0x5,
 359         BIFROST_UGT_I = 0x6,
 360         BIFROST_UGE_I = 0x7
 361 };
 362
 363 #define BIFROST_FMA_OP_CSEL4     (0x5c)
 364 #define BIFROST_FMA_OP_CSEL4_V16 (0xdc)
 365
 366 struct bifrost_csel4 {
 367         unsigned src0 : 3;
 368         unsigned src1 : 3;
 369         unsigned src2 : 3;
 370         unsigned src3 : 3;
 371         enum bifrost_csel_cond cond : 3;
 372         unsigned op   : 8;
 373 } __attribute__((packed));
 374
 375 #define BIFROST_FMA_OP_RSHIFT_NAND     (0x60000 >> 12)
 376 #define BIFROST_FMA_OP_RSHIFT_AND      (0x61000 >> 12)
 377 #define BIFROST_FMA_OP_LSHIFT_NAND     (0x62000 >> 12)
 378 #define BIFROST_FMA_OP_LSHIFT_AND      (0x63000 >> 12)
 379 #define BIFROST_FMA_OP_RSHIFT_XOR      (0x64000 >> 12)
 380 #define BIFROST_FMA_OP_LSHIFT_ADD_32   (0x65200 >> 6)
 381 #define BIFROST_FMA_OP_LSHIFT_SUB_32   (0x65600 >> 6)
 382 #define BIFROST_FMA_OP_LSHIFT_RSUB_32  (0x65a00 >> 6)
 383 #define BIFROST_FMA_OP_RSHIFT_ADD_32   (0x65e00 >> 6)
 384 #define BIFROST_FMA_OP_RSHIFT_SUB_32   (0x66200 >> 6)
 385 #define BIFROST_FMA_OP_RSHIFT_RSUB_32  (0x66600 >> 6)
 386
 387 struct bifrost_shift_fma {
 388         unsigned src0 : 3;
 389         unsigned src1 : 3;
 390         unsigned src2 : 3;
 391         unsigned half : 3;
 392         unsigned unk  : 1; /* always set? */
 393         unsigned invert_1 : 1; /* Inverts sources to combining op */
 394         /* For XOR, switches RSHIFT to LSHIFT since only one invert needed */
 395         unsigned invert_2 : 1;
 396         unsigned op : 8;
 397 } __attribute__((packed));
 398
 399 struct bifrost_shift_add {
 400         unsigned src0 : 3;
 401         unsigned src1 : 3;
 402         unsigned src2 : 3;
 403         unsigned zero : 2;
 404
 405         unsigned invert_1 : 1;
 406         unsigned invert_2 : 1;
 407
 408         unsigned op : 7;
 409 } __attribute__((packed));
 410
 411 enum bifrost_fcmp_cond {
 412         BIFROST_OEQ = 0,
 413         BIFROST_OGT = 1,
 414         BIFROST_OGE = 2,
 415         BIFROST_UNE = 3,
 416         BIFROST_OLT = 4,
 417         BIFROST_OLE = 5,
 418 };
 419
 420 #define BIFROST_FMA_OP_FCMP_GL (0x48000 >> 13)
 421 #define BIFROST_FMA_OP_FCMP_D3D (0x4c000 >> 13)
 422
 423 struct bifrost_fma_fcmp {
 424         unsigned src0 : 3;
 425         unsigned src1 : 3;
 426         unsigned src1_abs : 1;
 427         unsigned unk1 : 1;
 428         unsigned src1_neg : 1;
 429         unsigned src_expand : 3;
 430         unsigned src0_abs : 1;
 431         enum bifrost_fcmp_cond cond : 3;
 432         unsigned op   : 7;
 433 } __attribute__((packed));
 434
 435 struct bifrost_add_fcmp {
 436         unsigned src0 : 3;
 437         unsigned src1 : 3;
 438         enum bifrost_fcmp_cond cond : 3;
 439         unsigned src_expand : 2;
 440         unsigned src0_abs : 1;
 441         unsigned src1_abs : 1;
 442         unsigned src1_neg : 1;
 443         unsigned op   : 6;
 444 } __attribute__((packed));
 445
 446 #define BIFROST_FMA_OP_FCMP_GL_16 (0xc8000 >> 13)
 447 #define BIFROST_FMA_OP_FCMP_D3D_16 (0xcc000 >> 13)
 448
 449 struct bifrost_fma_fcmp16 {
 450         unsigned src0 : 3;
 451         unsigned src1 : 3;
 452
 453         /* abs2 inferred */
 454         unsigned abs1 : 1;
 455         unsigned unk : 2;
 456
 457         unsigned src0_swizzle : 2;
 458         unsigned src1_swizzle : 2;
 459
 460         enum bifrost_fcmp_cond cond : 3;
 461         unsigned op   : 7;
 462 } __attribute__((packed));
 463
 464 struct bifrost_add_fcmp16 {
 465         unsigned src0 : 3;
 466         unsigned src1 : 3;
 467         enum bifrost_fcmp_cond cond : 3;
 468
 469         unsigned src0_swizzle : 2;
 470         unsigned src1_swizzle : 2;
 471
 472         /* No abs mods */
 473         unsigned src0_neg : 1;
 474
 475         unsigned op   : 6;
 476 } __attribute__((packed));
 477
 478 enum bifrost_icmp_cond {
 479         BIFROST_ICMP_IGT = 0,
 480         BIFROST_ICMP_IGE = 1,
 481         BIFROST_ICMP_UGT = 2,
 482         BIFROST_ICMP_UGE = 3,
 483         BIFROST_ICMP_EQ  = 4,
 484         BIFROST_ICMP_NEQ  = 5,
 485 };
 486
 487 struct bifrost_fma_icmp32 {
 488         unsigned src0 : 3;
 489         unsigned src1 : 3;
 490         enum bifrost_icmp_cond cond : 3;
 491         unsigned unk1 : 1; /* set */
 492         unsigned d3d : 1;
 493         unsigned op : 12;
 494 } __attribute__((packed));
 495
 496 struct bifrost_fma_icmp16 {
 497         unsigned src0 : 3;
 498         unsigned src1 : 3;
 499         unsigned unk : 5; /* 11010 */
 500         enum bifrost_icmp_cond cond : 3;
 501         unsigned op : 9;
 502 } __attribute__((packed));
 503
 504 struct bifrost_add_icmp {
 505         unsigned src0 : 3;
 506         unsigned src1 : 3;
 507         enum bifrost_icmp_cond cond : 3;
 508         unsigned sz : 1; /* 1 for 32, 0 for 8 */
 509         unsigned d3d : 1;
 510         unsigned op : 9;
 511 } __attribute__((packed));
 512
 513 /* Two sources for vectorization */
 514 #define BIFROST_FMA_FLOAT32_TO_16 (0xdd000 >> 3)
 515 #define BIFROST_ADD_FLOAT32_TO_16 (0x0EC00 >> 3)
 516
 517 enum bifrost_convert_mode {
 518         BIFROST_CONV_UNK0 = 0,
 519         BIFROST_CONV_F32_TO_I32 = 1,
 520         BIFROST_CONV_F16_TO_I16 = 2,
 521         BIFROST_CONV_I32_TO_F32 = 3,
 522         BIFROST_CONV_I16_TO_X32 = 4,
 523         BIFROST_CONV_F16_TO_F32 = 5,
 524         BIFROST_CONV_I16_TO_F16 = 6,
 525         BIFROST_CONV_UNK7 = 7
 526 };
 527
 528 /* i16 to x32 */
 529 #define BIFROST_CONVERT_4(is_unsigned, component, to_float) \
 530         ((is_unsigned & 1) | ((component & 1) << 1) | ((to_float & 1) << 2) | \
 531          ((0x3) << 3) | ((4) << 5) | 0x100)
 532
 533 /* f16 to f32 */
 534 #define BIFROST_CONVERT_5(component) \
 535         ((component & 1) | ((1) << 1) | ((5) << 5) | 0x100)
 536
 537 /* Other conversions */
 538 #define BIFROST_CONVERT(is_unsigned, roundmode, swizzle, mode) \
 539         ((is_unsigned & 1) | ((roundmode & 3) << 1) | ((swizzle & 3) << 3) | ((mode & 7) << 5))
 540
 541 #define BIFROST_FMA_CONVERT (0xe0000)
 542 #define BIFROST_ADD_CONVERT (0x07800)
 543
 544 enum bifrost_ldst_type {
 545         BIFROST_LDST_F16 = 0,
 546         BIFROST_LDST_F32 = 1,
 547         BIFROST_LDST_I32 = 2,
 548         BIFROST_LDST_U32 = 3
 549 };
 550
 551 #define BIFROST_ADD_OP_LD_VAR_ADDR (0x18000 >> 10)
 552
 553 struct bifrost_ld_var_addr {
 554         unsigned src0 : 3;
 555         unsigned src1 : 3;
 556         unsigned location : 5;
 557         enum bifrost_ldst_type type : 2;
 558         unsigned op : 7;
 559 } __attribute__((packed));
 560
 561 #define BIFROST_ADD_OP_LD_ATTR (0x08000 >> 12)
 562
 563 struct bifrost_ld_attr {
 564         unsigned src0 : 3;
 565         unsigned src1 : 3;
 566         unsigned location : 5;
 567         unsigned channels : 2; /* MALI_POSITIVE */
 568         enum bifrost_ldst_type type : 2;
 569         unsigned op : 5;
 570 } __attribute__((packed));
 571
 572 enum bifrost_interp_mode {
 573         BIFROST_INTERP_PER_FRAG = 0x0,
 574         BIFROST_INTERP_CENTROID = 0x1,
 575         BIFROST_INTERP_DEFAULT  = 0x2,
 576         BIFROST_INTERP_EXPLICIT = 0x3
 577 };
 578
 579 #define BIFROST_ADD_OP_LD_VAR_16 (0x1a << 1)
 580 #define BIFROST_ADD_OP_LD_VAR_32 (0x0a << 1)
 581
 582 struct bifrost_ld_var {
 583         unsigned src0 : 3;
 584
 585         /* If top two bits set, indirect with src in bottom three */
 586         unsigned addr : 5;
 587
 588         unsigned channels : 2; /* MALI_POSITIVE */
 589         enum bifrost_interp_mode interp_mode : 2;
 590         unsigned reuse : 1;
 591         unsigned flat : 1;
 592         unsigned op : 6;
 593 } __attribute__((packed));
 594
 595 struct bifrost_tex_ctrl {
 596         unsigned sampler_index : 4; // also used to signal indirects
 597         unsigned tex_index : 7;
 598         bool no_merge_index : 1; // whether to merge (direct) sampler & texture indices
 599         bool filter : 1; // use the usual filtering pipeline (0 for texelFetch & textureGather)
 600         unsigned unk0 : 2;
 601         bool texel_offset : 1; // *Offset()
 602         bool is_shadow : 1;
 603         bool is_array : 1;
 604         unsigned tex_type : 2; // 2D, 3D, Cube, Buffer
 605         bool compute_lod : 1; // 0 for *Lod()
 606         bool not_supply_lod : 1; // 0 for *Lod() or when a bias is applied
 607         bool calc_gradients : 1; // 0 for *Grad()
 608         unsigned unk1 : 1;
 609         unsigned result_type : 4; // integer, unsigned, float TODO: why is this 4 bits?
 610         unsigned unk2 : 4;
 611 } __attribute__((packed));
 612
 613 struct bifrost_dual_tex_ctrl {
 614         unsigned sampler_index0 : 2;
 615         unsigned unk0 : 2;
 616         unsigned tex_index0 : 2;
 617         unsigned sampler_index1 : 2;
 618         unsigned tex_index1 : 2;
 619         unsigned unk1 : 22;
 620 } __attribute__((packed));
 621
 622 #define BIFROST_ADD_OP_TEX_COMPACT_F32 (0x0b000 >> 10)
 623 #define BIFROST_ADD_OP_TEX_COMPACT_F16 (0x1b000 >> 10)
 624
 625 struct bifrost_tex_compact {
 626         unsigned src0 : 3;
 627         unsigned src1 : 3;
 628         unsigned tex_index : 3;
 629         unsigned unknown : 1;
 630         unsigned sampler_index : 3;
 631         unsigned op   : 7;
 632 } __attribute__((packed));
 633
 634 enum branch_bit_size {
 635         BR_SIZE_32 = 0,
 636         BR_SIZE_16XX = 1,
 637         BR_SIZE_16YY = 2,
 638         // For the above combinations of bitsize and location, an extra bit is
 639         // encoded via comparing the sources. The only possible source of ambiguity
 640         // would be if the sources were the same, but then the branch condition
 641         // would be always true or always false anyways, so we can ignore it. But
 642         // this no longer works when comparing the y component to the x component,
 643         // since it's valid to compare the y component of a source against its own
 644         // x component. Instead, the extra bit is encoded via an extra bitsize.
 645         BR_SIZE_16YX0 = 3,
 646         BR_SIZE_16YX1 = 4,
 647         BR_SIZE_32_AND_16X = 5,
 648         BR_SIZE_32_AND_16Y = 6,
 649         // Used for comparisons with zero and always-true, see below. I think this
 650         // only works for integer comparisons.
 651         BR_SIZE_ZERO = 7,
 652 };
 653
 654 enum bifrost_reg_write_unit {
 655         REG_WRITE_NONE = 0, // don't write
 656         REG_WRITE_TWO, // write using reg2
 657         REG_WRITE_THREE, // write using reg3
 658 };
 659
 660 struct bifrost_regs {
 661         unsigned uniform_const : 8;
 662         unsigned reg2 : 6;
 663         unsigned reg3 : 6;
 664         unsigned reg0 : 5;
 665         unsigned reg1 : 6;
 666         unsigned ctrl : 4;
 667 } __attribute__((packed));
 668
 669 enum bifrost_branch_cond {
 670         BR_COND_LT = 0,
 671         BR_COND_LE = 1,
 672         BR_COND_GE = 2,
 673         BR_COND_GT = 3,
 674         // Equal vs. not-equal determined by src0/src1 comparison
 675         BR_COND_EQ = 4,
 676         // floating-point comparisons
 677         // Becomes UNE when you flip the arguments
 678         BR_COND_OEQ = 5,
 679         // TODO what happens when you flip the arguments?
 680         BR_COND_OGT = 6,
 681         BR_COND_OLT = 7,
 682 };
 683
 684 enum bifrost_branch_code {
 685         BR_ALWAYS = 63,
 686 };
 687
 688 struct bifrost_branch {
 689         unsigned src0 : 3;
 690
 691         /* For BR_SIZE_ZERO, upper two bits become ctrl */
 692         unsigned src1 : 3;
 693
 694         /* Offset source -- always uniform/const but
 695          * theoretically could support indirect jumps? */
 696         unsigned src2 : 3;
 697
 698         enum bifrost_branch_cond cond : 3;
 699         enum branch_bit_size size : 3;
 700
 701         unsigned op : 5;
 702 };
 703
 704 /* Clause packing */
 705
 706 #define BIFROST_FMA_NOP (0x701960 | BIFROST_SRC_STAGE)
 707 #define BIFROST_ADD_NOP (0x3D960 | BIFROST_SRC_STAGE)
 708
 709 struct bifrost_fmt1 {
 710         unsigned ins_0 : 3;
 711         unsigned tag : 5;
 712         uint64_t ins_1 : 64;
 713         unsigned ins_2 : 11;
 714         uint64_t header : 45;
 715 } __attribute__((packed));
 716
 717 #define BIFROST_FMT1_INSTRUCTIONS    0b00101
 718 #define BIFROST_FMT1_FINAL           0b01001
 719 #define BIFROST_FMT1_CONSTANTS       0b00001
 720
 721 #define BIFROST_FMTC_CONSTANTS       0b0011
 722 #define BIFROST_FMTC_FINAL           0b0111
 723
 724 struct bifrost_fmt_constant {
 725         unsigned pos : 4;
 726         unsigned tag : 4;
 727         uint64_t imm_1 : 60;
 728         uint64_t imm_2 : 60;
 729 } __attribute__((packed));
 730
 731 enum bifrost_reg_control {
 732         BIFROST_WRITE_FMA_P2         = 1,
 733         BIFROST_WRITE_FMA_P2_READ_P3 = 2,
 734         BIFROST_FIRST_WRITE_FMA_P2_READ_P3 = 3,
 735         BIFROST_READ_P3              = 4,
 736         BIFROST_WRITE_ADD_P2         = 5,
 737         BIFROST_WRITE_ADD_P2_READ_P3 = 6,
 738         BIFROST_WRITE_ADD_P2_FMA_P3  = 7,
 739
 740         BIFROST_FIRST_NONE           = 8,
 741         BIFROST_FIRST_WRITE_FMA_P2   = 9,
 742         /* INSTR_INVALID_ENC */
 743         BIFROST_REG_NONE             = 11,
 744         BIFROST_FIRST_READ_P3        = 12,
 745         BIFROST_FIRST_WRITE_ADD_P2   = 13,
 746         BIFROST_FIRST_WRITE_ADD_P2_READ_P3 = 14,
 747         BIFROST_FIRST_WRITE_ADD_P2_FMA_P3  = 15
 748 };
 749
 750 #endif