src/gallium/drivers/panfrost/midgard/midgard.h

   1 /* Author(s):
   2  *   Connor Abbott
   3  *   Alyssa Rosenzweig
   4  *
   5  * Copyright (c) 2013 Connor Abbott (connor@abbott.cx)
   6  * Copyright (c) 2018 Alyssa Rosenzweig (alyssa@rosenzweig.io)
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26
  27 #ifndef __midgard_h__
  28 #define __midgard_h__
  29
  30 #include <stdint.h>
  31 #include <stdbool.h>
  32
  33 typedef enum {
  34         midgard_word_type_alu,
  35         midgard_word_type_load_store,
  36         midgard_word_type_texture,
  37         midgard_word_type_unknown
  38 } midgard_word_type;
  39
  40 typedef enum {
  41         midgard_alu_vmul,
  42         midgard_alu_sadd,
  43         midgard_alu_smul,
  44         midgard_alu_vadd,
  45         midgard_alu_lut
  46 } midgard_alu;
  47
  48 /*
  49  * ALU words
  50  */
  51
  52 typedef enum {
  53         midgard_alu_op_fadd       = 0x10,
  54         midgard_alu_op_fmul       = 0x14,
  55         midgard_alu_op_fmin       = 0x28,
  56         midgard_alu_op_fmax       = 0x2C,
  57         midgard_alu_op_fmov       = 0x30,
  58         midgard_alu_op_ffloor     = 0x36,
  59         midgard_alu_op_fceil      = 0x37,
  60         midgard_alu_op_fdot3      = 0x3C,
  61         midgard_alu_op_fdot3r     = 0x3D,
  62         midgard_alu_op_fdot4      = 0x3E,
  63         midgard_alu_op_freduce    = 0x3F,
  64         midgard_alu_op_iadd       = 0x40,
  65         midgard_alu_op_ishladd    = 0x41,
  66         midgard_alu_op_isub       = 0x46,
  67         midgard_alu_op_imul       = 0x58,
  68         midgard_alu_op_imin       = 0x60,
  69         midgard_alu_op_imax       = 0x62,
  70         midgard_alu_op_iasr       = 0x68,
  71         midgard_alu_op_ilsr       = 0x69,
  72         midgard_alu_op_ishl       = 0x6E,
  73         midgard_alu_op_iand       = 0x70,
  74         midgard_alu_op_ior        = 0x71,
  75         midgard_alu_op_inot       = 0x72,
  76         midgard_alu_op_iandnot    = 0x74, /* (a, b) -> a & ~b, used for not/b2f */
  77         midgard_alu_op_ixor       = 0x76,
  78         midgard_alu_op_imov       = 0x7B,
  79         midgard_alu_op_feq        = 0x80,
  80         midgard_alu_op_fne        = 0x81,
  81         midgard_alu_op_flt        = 0x82,
  82         midgard_alu_op_fle        = 0x83,
  83         midgard_alu_op_fball_eq   = 0x88,
  84         midgard_alu_op_bball_eq   = 0x89,
  85         midgard_alu_op_bbany_neq  = 0x90, /* used for bvec4(1) */
  86         midgard_alu_op_fbany_neq  = 0x91, /* bvec4(0) also */
  87         midgard_alu_op_f2i        = 0x99,
  88         midgard_alu_op_f2u8       = 0x9C,
  89         midgard_alu_op_f2u        = 0x9D,
  90         midgard_alu_op_ieq        = 0xA0,
  91         midgard_alu_op_ine        = 0xA1,
  92         midgard_alu_op_ilt        = 0xA4,
  93         midgard_alu_op_ile        = 0xA5,
  94         midgard_alu_op_iball_eq   = 0xA8,
  95         midgard_alu_op_ball       = 0xA9,
  96         midgard_alu_op_ibany_neq  = 0xB1,
  97         midgard_alu_op_i2f        = 0xB8,
  98         midgard_alu_op_u2f        = 0xBC,
  99         midgard_alu_op_icsel      = 0xC1,
 100         midgard_alu_op_fcsel      = 0xC5,
 101         midgard_alu_op_fatan_pt2  = 0xE8,
 102         midgard_alu_op_frcp       = 0xF0,
 103         midgard_alu_op_frsqrt     = 0xF2,
 104         midgard_alu_op_fsqrt      = 0xF3,
 105         midgard_alu_op_fexp2      = 0xF4,
 106         midgard_alu_op_flog2      = 0xF5,
 107         midgard_alu_op_fsin       = 0xF6,
 108         midgard_alu_op_fcos       = 0xF7,
 109         midgard_alu_op_fatan2_pt1 = 0xF9,
 110 } midgard_alu_op;
 111
 112 typedef enum {
 113         midgard_outmod_none = 0,
 114         midgard_outmod_pos  = 1,
 115         midgard_outmod_int  = 2,
 116         midgard_outmod_sat  = 3
 117 } midgard_outmod;
 118
 119 typedef enum {
 120         midgard_reg_mode_quarter = 0,
 121         midgard_reg_mode_half = 1,
 122         midgard_reg_mode_full = 2,
 123         midgard_reg_mode_double = 3 /* TODO: verify */
 124 } midgard_reg_mode;
 125
 126 typedef enum {
 127         midgard_dest_override_lower = 0,
 128         midgard_dest_override_upper = 1,
 129         midgard_dest_override_none = 2
 130 } midgard_dest_override;
 131
 132 typedef struct
 133 __attribute__((__packed__))
 134 {
 135         bool abs         : 1;
 136         bool negate      : 1;
 137
 138         /* replicate lower half if dest = half, or low/high half selection if
 139          * dest = full
 140          */
 141         bool rep_low     : 1;
 142         bool rep_high    : 1; /* unused if dest = full */
 143         bool half        : 1; /* only matters if dest = full */
 144         unsigned swizzle : 8;
 145 }
 146 midgard_vector_alu_src;
 147
 148 typedef struct
 149 __attribute__((__packed__))
 150 {
 151         midgard_alu_op op               :  8;
 152         midgard_reg_mode reg_mode   :  2;
 153         unsigned src1 : 13;
 154         unsigned src2 : 13;
 155         midgard_dest_override dest_override : 2;
 156         midgard_outmod outmod               : 2;
 157         unsigned mask                           : 8;
 158 }
 159 midgard_vector_alu;
 160
 161 typedef struct
 162 __attribute__((__packed__))
 163 {
 164         bool abs           : 1;
 165         bool negate        : 1;
 166         bool full          : 1; /* 0 = half, 1 = full */
 167         unsigned component : 3;
 168 }
 169 midgard_scalar_alu_src;
 170
 171 typedef struct
 172 __attribute__((__packed__))
 173 {
 174         midgard_alu_op op         :  8;
 175         unsigned src1             :  6;
 176         unsigned src2             : 11;
 177         unsigned unknown          :  1;
 178         midgard_outmod outmod :  2;
 179         bool output_full          :  1;
 180         unsigned output_component :  3;
 181 }
 182 midgard_scalar_alu;
 183
 184 typedef struct
 185 __attribute__((__packed__))
 186 {
 187         unsigned src1_reg : 5;
 188         unsigned src2_reg : 5;
 189         unsigned out_reg  : 5;
 190         bool src2_imm     : 1;
 191 }
 192 midgard_reg_info;
 193
 194 typedef enum {
 195         midgard_jmp_writeout_op_branch_uncond = 1,
 196         midgard_jmp_writeout_op_branch_cond = 2,
 197         midgard_jmp_writeout_op_discard = 4,
 198         midgard_jmp_writeout_op_writeout = 7,
 199 } midgard_jmp_writeout_op;
 200
 201 typedef enum {
 202         midgard_condition_write0 = 0,
 203         midgard_condition_false = 1,
 204         midgard_condition_true = 2,
 205         midgard_condition_always = 3, /* Special for writeout/uncond discard */
 206 } midgard_condition;
 207
 208 typedef struct
 209 __attribute__((__packed__))
 210 {
 211         midgard_jmp_writeout_op op : 3; /* == branch_uncond */
 212         unsigned dest_tag : 4; /* tag of branch destination */
 213         unsigned unknown : 2;
 214         int offset : 7;
 215 }
 216 midgard_branch_uncond;
 217
 218 typedef struct
 219 __attribute__((__packed__))
 220 {
 221         midgard_jmp_writeout_op op : 3; /* == branch_cond */
 222         unsigned dest_tag : 4; /* tag of branch destination */
 223         int offset : 7;
 224         midgard_condition cond : 2;
 225 }
 226 midgard_branch_cond;
 227
 228 typedef struct
 229 __attribute__((__packed__))
 230 {
 231         midgard_jmp_writeout_op op : 3; /* == branch_cond */
 232         unsigned dest_tag : 4; /* tag of branch destination */
 233         unsigned unknown : 2;
 234         signed offset : 23;
 235         unsigned cond : 16;
 236 }
 237 midgard_branch_extended;
 238
 239 typedef struct
 240 __attribute__((__packed__))
 241 {
 242         midgard_jmp_writeout_op op : 3; /* == writeout */
 243         unsigned unknown : 13;
 244 }
 245 midgard_writeout;
 246
 247 /*
 248  * Load/store words
 249  */
 250
 251 typedef enum {
 252         midgard_op_ld_st_noop   = 0x03,
 253         midgard_op_load_attr_16 = 0x95,
 254         midgard_op_load_attr_32 = 0x94,
 255         midgard_op_load_vary_16 = 0x99,
 256         midgard_op_load_vary_32 = 0x98,
 257         midgard_op_load_color_buffer_16 = 0x9D,
 258         midgard_op_load_color_buffer_8 = 0xBA,
 259         midgard_op_load_uniform_16 = 0xAC,
 260         midgard_op_load_uniform_32 = 0xB0,
 261         midgard_op_store_vary_16 = 0xD5,
 262         midgard_op_store_vary_32 = 0xD4
 263 } midgard_load_store_op;
 264
 265 typedef enum {
 266         midgard_interp_centroid = 1,
 267         midgard_interp_default = 2
 268 } midgard_interpolation;
 269
 270 typedef struct
 271 __attribute__((__packed__))
 272 {
 273         unsigned zero1 : 4; /* Always zero */
 274
 275         /* Varying qualifiers, zero if not a varying */
 276         unsigned flat    : 1;
 277         unsigned is_varying : 1; /* Always one for varying, but maybe something else? */
 278         midgard_interpolation interpolation : 2;
 279
 280         unsigned zero2 : 2; /* Always zero */
 281 }
 282 midgard_varying_parameter;
 283
 284 typedef struct
 285 __attribute__((__packed__))
 286 {
 287         midgard_load_store_op op : 8;
 288         unsigned reg     : 5;
 289         unsigned mask    : 4;
 290         unsigned swizzle : 8;
 291         unsigned unknown : 16;
 292
 293         unsigned varying_parameters : 10;
 294
 295         unsigned address : 9;
 296 }
 297 midgard_load_store_word;
 298
 299 typedef struct
 300 __attribute__((__packed__))
 301 {
 302         unsigned type      : 4;
 303         unsigned next_type : 4;
 304         uint64_t word1     : 60;
 305         uint64_t word2     : 60;
 306 }
 307 midgard_load_store;
 308
 309 /* Texture pipeline results are in r28-r29 */
 310 #define REG_TEX_BASE 28
 311
 312 /* Texture opcodes... maybe? */
 313 #define TEXTURE_OP_NORMAL 0x11
 314 #define TEXTURE_OP_TEXEL_FETCH 0x14
 315
 316 /* Texture format types, found in format */
 317 #define TEXTURE_CUBE 0x00
 318 #define TEXTURE_2D 0x02
 319 #define TEXTURE_3D 0x03
 320
 321 typedef struct
 322 __attribute__((__packed__))
 323 {
 324         unsigned type      : 4;
 325         unsigned next_type : 4;
 326
 327         unsigned op  : 6;
 328         unsigned shadow    : 1;
 329         unsigned unknown3  : 1;
 330
 331         /* A little obscure, but last is set for the last texture operation in
 332          * a shader. cont appears to just be last's opposite (?). Yeah, I know,
 333          * kind of funky.. BiOpen thinks it could do with memory hinting, or
 334          * tile locking? */
 335
 336         unsigned cont  : 1;
 337         unsigned last  : 1;
 338
 339         unsigned format    : 5;
 340         unsigned has_offset : 1;
 341
 342         /* Like in Bifrost */
 343         unsigned filter  : 1;
 344
 345         unsigned in_reg_select : 1;
 346         unsigned in_reg_upper  : 1;
 347
 348         unsigned in_reg_swizzle_left : 2;
 349         unsigned in_reg_swizzle_right : 2;
 350
 351         unsigned unknown1 : 2;
 352
 353         unsigned unknown8  : 4;
 354
 355         unsigned out_full  : 1;
 356
 357         /* Always 1 afaict... */
 358         unsigned unknown7  : 2;
 359
 360         unsigned out_reg_select : 1;
 361         unsigned out_upper : 1;
 362
 363         unsigned mask : 4;
 364
 365         unsigned unknown2  : 2;
 366
 367         unsigned swizzle  : 8;
 368         unsigned unknown4  : 8;
 369
 370         unsigned unknownA  : 4;
 371
 372         unsigned offset_unknown1  : 1;
 373         unsigned offset_reg_select : 1;
 374         unsigned offset_reg_upper : 1;
 375         unsigned offset_unknown4  : 1;
 376         unsigned offset_unknown5  : 1;
 377         unsigned offset_unknown6  : 1;
 378         unsigned offset_unknown7  : 1;
 379         unsigned offset_unknown8  : 1;
 380         unsigned offset_unknown9  : 1;
 381
 382         unsigned unknownB  : 3;
 383
 384         /* Texture bias or LOD, depending on whether it is executed in a
 385          * fragment/vertex shader respectively. Compute as int(2^8 * biasf).
 386          *
 387          * For texel fetch, this is the LOD as is. */
 388         unsigned bias  : 8;
 389
 390         unsigned unknown9  : 8;
 391
 392         unsigned texture_handle : 16;
 393         unsigned sampler_handle : 16;
 394 }
 395 midgard_texture_word;
 396
 397 /* Opcode name table */
 398
 399 static char *alu_opcode_names[256] = {
 400         [midgard_alu_op_fadd]       = "fadd",
 401         [midgard_alu_op_fmul]       = "fmul",
 402         [midgard_alu_op_fmin]       = "fmin",
 403         [midgard_alu_op_fmax]       = "fmax",
 404         [midgard_alu_op_fmov]       = "fmov",
 405         [midgard_alu_op_ffloor]     = "ffloor",
 406         [midgard_alu_op_fceil]      = "fceil",
 407         [midgard_alu_op_fdot3]      = "fdot3",
 408         [midgard_alu_op_fdot3r]     = "fdot3r",
 409         [midgard_alu_op_fdot4]      = "fdot4",
 410         [midgard_alu_op_freduce]    = "freduce",
 411         [midgard_alu_op_imin]       = "imin",
 412         [midgard_alu_op_imax]       = "imax",
 413         [midgard_alu_op_ishl]       = "ishl",
 414         [midgard_alu_op_iasr]       = "iasr",
 415         [midgard_alu_op_ilsr]       = "ilsr",
 416         [midgard_alu_op_iadd]       = "iadd",
 417         [midgard_alu_op_ishladd]    = "ishladd",
 418         [midgard_alu_op_isub]       = "isub",
 419         [midgard_alu_op_imul]       = "imul",
 420         [midgard_alu_op_imov]       = "imov",
 421         [midgard_alu_op_iand]       = "iand",
 422         [midgard_alu_op_ior]        = "ior",
 423         [midgard_alu_op_inot]       = "inot",
 424         [midgard_alu_op_iandnot]    = "iandnot",
 425         [midgard_alu_op_ixor]       = "ixor",
 426         [midgard_alu_op_feq]        = "feq",
 427         [midgard_alu_op_fne]        = "fne",
 428         [midgard_alu_op_flt]        = "flt",
 429         [midgard_alu_op_fle]        = "fle",
 430         [midgard_alu_op_fball_eq]   = "fball_eq",
 431         [midgard_alu_op_fbany_neq]  = "fbany_neq",
 432         [midgard_alu_op_bball_eq]   = "bball_eq",
 433         [midgard_alu_op_bbany_neq]  = "bbany_neq",
 434         [midgard_alu_op_f2i]        = "f2i",
 435         [midgard_alu_op_f2u]        = "f2u",
 436         [midgard_alu_op_f2u8]       = "f2u8",
 437         [midgard_alu_op_ieq]        = "ieq",
 438         [midgard_alu_op_ine]        = "ine",
 439         [midgard_alu_op_ilt]        = "ilt",
 440         [midgard_alu_op_ile]        = "ile",
 441         [midgard_alu_op_iball_eq]   = "iball_eq",
 442         [midgard_alu_op_ball]       = "ball",
 443         [midgard_alu_op_ibany_neq]  = "ibany_neq",
 444         [midgard_alu_op_i2f]        = "i2f",
 445         [midgard_alu_op_u2f]        = "u2f",
 446         [midgard_alu_op_icsel]      = "icsel",
 447         [midgard_alu_op_fcsel]      = "fcsel",
 448         [midgard_alu_op_fatan_pt2]  = "fatan_pt2",
 449         [midgard_alu_op_frcp]       = "frcp",
 450         [midgard_alu_op_frsqrt]     = "frsqrt",
 451         [midgard_alu_op_fsqrt]      = "fsqrt",
 452         [midgard_alu_op_fexp2]      = "fexp2",
 453         [midgard_alu_op_flog2]      = "flog2",
 454         [midgard_alu_op_fsin]       = "fsin",
 455         [midgard_alu_op_fcos]       = "fcos",
 456         [midgard_alu_op_fatan2_pt1] = "fatan2_pt1"
 457 };
 458
 459 static char *load_store_opcode_names[256] = {
 460         [midgard_op_load_attr_16] = "ld_attr_16",
 461         [midgard_op_load_attr_32] = "ld_attr_32",
 462         [midgard_op_load_vary_16] = "ld_vary_16",
 463         [midgard_op_load_vary_32] = "ld_vary_32",
 464         [midgard_op_load_uniform_16] = "ld_uniform_16",
 465         [midgard_op_load_uniform_32] = "ld_uniform_32",
 466         [midgard_op_load_color_buffer_8] = "ld_color_buffer_8",
 467         [midgard_op_load_color_buffer_16] = "ld_color_buffer_16",
 468         [midgard_op_store_vary_16] = "st_vary_16",
 469         [midgard_op_store_vary_32] = "st_vary_32"
 470 };
 471
 472 #endif