src/gallium/drivers/vc4/vc4_qpu_disasm.c

   1 /*
   2  * Copyright © 2014 Broadcom
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <stdbool.h>
  25 #include <stdio.h>
  26
  27 #include "vc4_qpu.h"
  28 #include "vc4_qpu_defines.h"
  29
  30 static const char *qpu_add_opcodes[] = {
  31         [QPU_A_NOP] = "nop",
  32         [QPU_A_FADD] = "fadd",
  33         [QPU_A_FSUB] = "fsub",
  34         [QPU_A_FMIN] = "fmin",
  35         [QPU_A_FMAX] = "fmax",
  36         [QPU_A_FMINABS] = "fminabs",
  37         [QPU_A_FMAXABS] = "fmaxabs",
  38         [QPU_A_FTOI] = "ftoi",
  39         [QPU_A_ITOF] = "itof",
  40         [QPU_A_ADD] = "add",
  41         [QPU_A_SUB] = "sub",
  42         [QPU_A_SHR] = "shr",
  43         [QPU_A_ASR] = "asr",
  44         [QPU_A_ROR] = "ror",
  45         [QPU_A_SHL] = "shl",
  46         [QPU_A_MIN] = "min",
  47         [QPU_A_MAX] = "max",
  48         [QPU_A_AND] = "and",
  49         [QPU_A_OR] = "or",
  50         [QPU_A_XOR] = "xor",
  51         [QPU_A_NOT] = "not",
  52         [QPU_A_CLZ] = "clz",
  53         [QPU_A_V8ADDS] = "v8adds",
  54         [QPU_A_V8SUBS] = "v8subs",
  55 };
  56
  57 static const char *qpu_mul_opcodes[] = {
  58         [QPU_M_NOP] = "nop",
  59         [QPU_M_FMUL] = "fmul",
  60         [QPU_M_MUL24] = "mul24",
  61         [QPU_M_V8MULD] = "v8muld",
  62         [QPU_M_V8MIN] = "v8min",
  63         [QPU_M_V8MAX] = "v8max",
  64         [QPU_M_V8ADDS] = "v8adds",
  65         [QPU_M_V8SUBS] = "v8subs",
  66 };
  67
  68 static const char *qpu_sig[] = {
  69         [QPU_SIG_SW_BREAKPOINT] = "sig_brk",
  70         [QPU_SIG_NONE] = "",
  71         [QPU_SIG_THREAD_SWITCH] = "sig_switch",
  72         [QPU_SIG_PROG_END] = "sig_end",
  73         [QPU_SIG_WAIT_FOR_SCOREBOARD] = "sig_wait_score",
  74         [QPU_SIG_SCOREBOARD_UNLOCK] = "sig_unlock_score",
  75         [QPU_SIG_LAST_THREAD_SWITCH] = "sig_thread_switch",
  76         [QPU_SIG_COVERAGE_LOAD] = "sig_coverage_load",
  77         [QPU_SIG_COLOR_LOAD] = "sig_color_load",
  78         [QPU_SIG_COLOR_LOAD_END] = "sig_color_load_end",
  79         [QPU_SIG_LOAD_TMU0] = "load_tmu0",
  80         [QPU_SIG_LOAD_TMU1] = "load_tmu1",
  81         [QPU_SIG_ALPHA_MASK_LOAD] = "sig_alpha_mask_load",
  82         [QPU_SIG_SMALL_IMM] = "sig_small_imm",
  83         [QPU_SIG_LOAD_IMM] = "sig_load_imm",
  84         [QPU_SIG_BRANCH] = "sig_branch",
  85 };
  86
  87 static const char *qpu_pack_mul[] = {
  88         [QPU_PACK_MUL_NOP] = "",
  89         [QPU_PACK_MUL_8888] = "8888",
  90         [QPU_PACK_MUL_8A] = "8a",
  91         [QPU_PACK_MUL_8B] = "8b",
  92         [QPU_PACK_MUL_8C] = "8c",
  93         [QPU_PACK_MUL_8D] = "8d",
  94 };
  95
  96 /* The QPU unpack for A and R4 files can be described the same, it's just that
  97  * the R4 variants are convert-to-float only, with no int support.
  98  */
  99 static const char *qpu_unpack[] = {
 100         [QPU_UNPACK_NOP] = "",
 101         [QPU_UNPACK_16A_TO_F32] = "16a",
 102         [QPU_UNPACK_16B_TO_F32] = "16b",
 103         [QPU_UNPACK_8D_REP] = "8d_rep",
 104         [QPU_UNPACK_8A] = "8a",
 105         [QPU_UNPACK_8B] = "8b",
 106         [QPU_UNPACK_8C] = "8c",
 107         [QPU_UNPACK_8D] = "8d",
 108 };
 109
 110 static const char *special_read_a[] = {
 111         "uni",
 112         NULL,
 113         NULL,
 114         "vary",
 115         NULL,
 116         NULL,
 117         "elem",
 118         "nop",
 119         NULL,
 120         "x_pix",
 121         "ms_flags",
 122         NULL,
 123         NULL,
 124         NULL,
 125         NULL,
 126         NULL,
 127         "vpm_read",
 128         "vpm_ld_busy",
 129         "vpm_ld_wait",
 130         "mutex_acq"
 131 };
 132
 133 static const char *special_read_b[] = {
 134         "uni",
 135         NULL,
 136         NULL,
 137         "vary",
 138         NULL,
 139         NULL,
 140         "qpu",
 141         "nop",
 142         NULL,
 143         "y_pix",
 144         "rev_flag",
 145         NULL,
 146         NULL,
 147         NULL,
 148         NULL,
 149         NULL,
 150         "vpm_read",
 151         "vpm_st_busy",
 152         "vpm_st_wait",
 153         "mutex_acq"
 154 };
 155
 156 /**
 157  * This has the B-file descriptions for register writes.
 158  *
 159  * Since only a couple of regs are different between A and B, the A overrides
 160  * are in get_special_write_desc().
 161  */
 162 static const char *special_write[] = {
 163         [QPU_W_ACC0] = "r0",
 164         [QPU_W_ACC1] = "r1",
 165         [QPU_W_ACC2] = "r2",
 166         [QPU_W_ACC3] = "r3",
 167         [QPU_W_TMU_NOSWAP] = "tmu_noswap",
 168         [QPU_W_ACC5] = "r5",
 169         [QPU_W_HOST_INT] = "host_int",
 170         [QPU_W_NOP] = "nop",
 171         [QPU_W_UNIFORMS_ADDRESS] = "uniforms_addr",
 172         [QPU_W_QUAD_XY] = "quad_y",
 173         [QPU_W_MS_FLAGS] = "ms_flags",
 174         [QPU_W_TLB_STENCIL_SETUP] = "tlb_stencil_setup",
 175         [QPU_W_TLB_Z] = "tlb_z",
 176         [QPU_W_TLB_COLOR_MS] = "tlb_color_ms",
 177         [QPU_W_TLB_COLOR_ALL] = "tlb_color_all",
 178         [QPU_W_VPM] = "vpm",
 179         [QPU_W_VPMVCD_SETUP] = "vw_setup",
 180         [QPU_W_VPM_ADDR] = "vw_addr",
 181         [QPU_W_MUTEX_RELEASE] = "mutex_release",
 182         [QPU_W_SFU_RECIP] = "sfu_recip",
 183         [QPU_W_SFU_RECIPSQRT] = "sfu_recipsqrt",
 184         [QPU_W_SFU_EXP] = "sfu_exp",
 185         [QPU_W_SFU_LOG] = "sfu_log",
 186         [QPU_W_TMU0_S] = "tmu0_s",
 187         [QPU_W_TMU0_T] = "tmu0_t",
 188         [QPU_W_TMU0_R] = "tmu0_r",
 189         [QPU_W_TMU0_B] = "tmu0_b",
 190         [QPU_W_TMU1_S] = "tmu1_s",
 191         [QPU_W_TMU1_T] = "tmu1_t",
 192         [QPU_W_TMU1_R] = "tmu1_r",
 193         [QPU_W_TMU1_B] = "tmu1_b",
 194 };
 195
 196 static const char *qpu_pack_a[] = {
 197         [QPU_PACK_A_NOP] = "",
 198         [QPU_PACK_A_16A] = ".16a",
 199         [QPU_PACK_A_16B] = ".16b",
 200         [QPU_PACK_A_8888] = ".8888",
 201         [QPU_PACK_A_8A] = ".8a",
 202         [QPU_PACK_A_8B] = ".8b",
 203         [QPU_PACK_A_8C] = ".8c",
 204         [QPU_PACK_A_8D] = ".8d",
 205
 206         [QPU_PACK_A_32_SAT] = ".sat",
 207         [QPU_PACK_A_16A_SAT] = ".16a.sat",
 208         [QPU_PACK_A_16B_SAT] = ".16b.sat",
 209         [QPU_PACK_A_8888_SAT] = ".8888.sat",
 210         [QPU_PACK_A_8A_SAT] = ".8a.sat",
 211         [QPU_PACK_A_8B_SAT] = ".8b.sat",
 212         [QPU_PACK_A_8C_SAT] = ".8c.sat",
 213         [QPU_PACK_A_8D_SAT] = ".8d.sat",
 214 };
 215
 216 static const char *qpu_condflags[] = {
 217         [QPU_COND_NEVER] = ".never",
 218         [QPU_COND_ALWAYS] = "",
 219         [QPU_COND_ZS] = ".zs",
 220         [QPU_COND_ZC] = ".zc",
 221         [QPU_COND_NS] = ".ns",
 222         [QPU_COND_NC] = ".nc",
 223         [QPU_COND_CS] = ".cs",
 224         [QPU_COND_CC] = ".cc",
 225 };
 226
 227 #define DESC(array, index)                                        \
 228         ((index > ARRAY_SIZE(array) || !(array)[index]) ?         \
 229          "???" : (array)[index])
 230
 231 static const char *
 232 get_special_write_desc(int reg, bool is_a)
 233 {
 234         if (is_a) {
 235                 switch (reg) {
 236                 case QPU_W_QUAD_XY:
 237                         return "quad_x";
 238                 case QPU_W_VPMVCD_SETUP:
 239                         return "vr_setup";
 240                 case QPU_W_VPM_ADDR:
 241                         return "vr_addr";
 242                 }
 243         }
 244
 245         return special_write[reg];
 246 }
 247
 248 static void
 249 print_alu_dst(uint64_t inst, bool is_mul)
 250 {
 251         bool is_a = is_mul == ((inst & QPU_WS) != 0);
 252         uint32_t waddr = (is_mul ?
 253                           QPU_GET_FIELD(inst, QPU_WADDR_MUL) :
 254                           QPU_GET_FIELD(inst, QPU_WADDR_ADD));
 255         const char *file = is_a ? "a" : "b";
 256         uint32_t pack = QPU_GET_FIELD(inst, QPU_PACK);
 257
 258         if (waddr <= 31)
 259                 fprintf(stderr, "r%s%d", file, waddr);
 260         else if (get_special_write_desc(waddr, is_a))
 261                 fprintf(stderr, "%s", get_special_write_desc(waddr, is_a));
 262         else
 263                 fprintf(stderr, "%s%d?", file, waddr);
 264
 265         if (is_mul && (inst & QPU_PM)) {
 266                 fprintf(stderr, ".%s", DESC(qpu_pack_mul, pack));
 267         } else if (is_a && !(inst & QPU_PM)) {
 268                 fprintf(stderr, "%s", DESC(qpu_pack_a, pack));
 269         }
 270 }
 271
 272 static void
 273 print_alu_src(uint64_t inst, uint32_t mux)
 274 {
 275         bool is_a = mux != QPU_MUX_B;
 276         const char *file = is_a ? "a" : "b";
 277         uint32_t raddr = (is_a ?
 278                           QPU_GET_FIELD(inst, QPU_RADDR_A) :
 279                           QPU_GET_FIELD(inst, QPU_RADDR_B));
 280         uint32_t unpack = QPU_GET_FIELD(inst, QPU_UNPACK);
 281
 282         if (mux <= QPU_MUX_R5)
 283                 fprintf(stderr, "r%d", mux);
 284         else if (!is_a &&
 285                  QPU_GET_FIELD(inst, QPU_SIG) == QPU_SIG_SMALL_IMM) {
 286                 uint32_t si = QPU_GET_FIELD(inst, QPU_SMALL_IMM);
 287                 if (si <= 15)
 288                         fprintf(stderr, "%d", si);
 289                 else if (si <= 31)
 290                         fprintf(stderr, "%d", -16 + (si - 16));
 291                 else if (si <= 39)
 292                         fprintf(stderr, "%.1f", (float)(1 << (si - 32)));
 293                 else if (si <= 47)
 294                         fprintf(stderr, "%f", 1.0f / (256 / (si - 39)));
 295                 else
 296                         fprintf(stderr, "???");
 297         } else if (raddr <= 31)
 298                 fprintf(stderr, "r%s%d", file, raddr);
 299         else {
 300                 if (is_a)
 301                         fprintf(stderr, "%s", DESC(special_read_a, raddr - 32));
 302                 else
 303                         fprintf(stderr, "%s", DESC(special_read_b, raddr - 32));
 304         }
 305
 306         if (unpack != QPU_UNPACK_NOP &&
 307             ((mux == QPU_MUX_A && !(inst & QPU_PM)) ||
 308              (mux == QPU_MUX_R4 && (inst & QPU_PM)))) {
 309                 fprintf(stderr, ".%s", DESC(qpu_unpack, unpack));
 310         }
 311 }
 312
 313 static void
 314 print_add_op(uint64_t inst)
 315 {
 316         uint32_t op_add = QPU_GET_FIELD(inst, QPU_OP_ADD);
 317         uint32_t cond = QPU_GET_FIELD(inst, QPU_COND_ADD);
 318         bool is_mov = (op_add == QPU_A_OR &&
 319                        QPU_GET_FIELD(inst, QPU_ADD_A) ==
 320                        QPU_GET_FIELD(inst, QPU_ADD_B));
 321
 322         fprintf(stderr, "%s%s%s ",
 323                 is_mov ? "mov" : DESC(qpu_add_opcodes, op_add),
 324                 ((inst & QPU_SF) && op_add != QPU_A_NOP) ? ".sf" : "",
 325                 op_add != QPU_A_NOP ? DESC(qpu_condflags, cond) : "");
 326
 327         print_alu_dst(inst, false);
 328         fprintf(stderr, ", ");
 329
 330         print_alu_src(inst, QPU_GET_FIELD(inst, QPU_ADD_A));
 331
 332         if (!is_mov) {
 333                 fprintf(stderr, ", ");
 334
 335                 print_alu_src(inst, QPU_GET_FIELD(inst, QPU_ADD_B));
 336         }
 337 }
 338
 339 static void
 340 print_mul_op(uint64_t inst)
 341 {
 342         uint32_t op_add = QPU_GET_FIELD(inst, QPU_OP_ADD);
 343         uint32_t op_mul = QPU_GET_FIELD(inst, QPU_OP_MUL);
 344         uint32_t cond = QPU_GET_FIELD(inst, QPU_COND_MUL);
 345         bool is_mov = (op_mul == QPU_M_V8MIN &&
 346                        QPU_GET_FIELD(inst, QPU_MUL_A) ==
 347                        QPU_GET_FIELD(inst, QPU_MUL_B));
 348
 349         fprintf(stderr, "%s%s%s ",
 350                 is_mov ? "mov" : DESC(qpu_mul_opcodes, op_mul),
 351                 ((inst & QPU_SF) && op_add == QPU_A_NOP) ? ".sf" : "",
 352                 op_mul != QPU_M_NOP ? DESC(qpu_condflags, cond) : "");
 353
 354         print_alu_dst(inst, true);
 355         fprintf(stderr, ", ");
 356
 357         print_alu_src(inst, QPU_GET_FIELD(inst, QPU_MUL_A));
 358
 359         if (!is_mov) {
 360                 fprintf(stderr, ", ");
 361                 print_alu_src(inst, QPU_GET_FIELD(inst, QPU_MUL_B));
 362         }
 363 }
 364
 365 static void
 366 print_load_imm(uint64_t inst)
 367 {
 368         uint32_t imm = inst;
 369         uint32_t waddr_add = QPU_GET_FIELD(inst, QPU_WADDR_ADD);
 370         uint32_t waddr_mul = QPU_GET_FIELD(inst, QPU_WADDR_MUL);
 371         uint32_t cond_add = QPU_GET_FIELD(inst, QPU_COND_ADD);
 372         uint32_t cond_mul = QPU_GET_FIELD(inst, QPU_COND_MUL);
 373
 374         fprintf(stderr, "load_imm ");
 375         print_alu_dst(inst, false);
 376         fprintf(stderr, "%s, ", (waddr_add != QPU_W_NOP ?
 377                                  DESC(qpu_condflags, cond_add) : ""));
 378         print_alu_dst(inst, true);
 379         fprintf(stderr, "%s, ", (waddr_mul != QPU_W_NOP ?
 380                                  DESC(qpu_condflags, cond_mul) : ""));
 381         fprintf(stderr, "0x%08x (%f)", imm, uif(imm));
 382 }
 383
 384 void
 385 vc4_qpu_disasm(const uint64_t *instructions, int num_instructions)
 386 {
 387         for (int i = 0; i < num_instructions; i++) {
 388                 uint64_t inst = instructions[i];
 389                 uint32_t sig = QPU_GET_FIELD(inst, QPU_SIG);
 390
 391                 switch (sig) {
 392                 case QPU_SIG_BRANCH:
 393                         fprintf(stderr, "branch");
 394                         break;
 395                 case QPU_SIG_LOAD_IMM:
 396                         print_load_imm(inst);
 397                         break;
 398                 default:
 399                         if (sig != QPU_SIG_NONE)
 400                                 fprintf(stderr, "%s ", DESC(qpu_sig, sig));
 401                         print_add_op(inst);
 402                         fprintf(stderr, " ; ");
 403                         print_mul_op(inst);
 404                         break;
 405                 }
 406
 407                 if (num_instructions != 1)
 408                         fprintf(stderr, "\n");
 409         }
 410 }