src/panfrost/midgard/midgard_print.c

   1 /*
   2  * Copyright (C) 2018-2019 Alyssa Rosenzweig <alyssa@rosenzweig.io>
   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 FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 #include "compiler.h"
  25 #include "helpers.h"
  26 #include "midgard_ops.h"
  27
  28 /* Pretty printer for Midgard IR, for use debugging compiler-internal
  29  * passes like register allocation. The output superficially resembles
  30  * Midgard assembly, with the exception that unit information and such is
  31  * (normally) omitted, and generic indices are usually used instead of
  32  * registers */
  33
  34 static void
  35 mir_print_source(int source)
  36 {
  37         if (source >= SSA_FIXED_MINIMUM) {
  38                 /* Specific register */
  39                 int reg = SSA_REG_FROM_FIXED(source);
  40
  41                 /* TODO: Moving threshold */
  42                 if (reg > 16 && reg < 24)
  43                         printf("u%d", 23 - reg);
  44                 else
  45                         printf("r%d", reg);
  46         } else {
  47                 printf("%d", source);
  48         }
  49 }
  50
  51 void
  52 mir_print_instruction(midgard_instruction *ins)
  53 {
  54         printf("\t");
  55
  56         switch (ins->type) {
  57         case TAG_ALU_4: {
  58                 midgard_alu_op op = ins->alu.op;
  59                 const char *name = alu_opcode_props[op].name;
  60
  61                 if (ins->unit)
  62                         printf("%d.", ins->unit);
  63
  64                 printf("%s", name ? name : "??");
  65                 break;
  66         }
  67
  68         case TAG_LOAD_STORE_4: {
  69                 midgard_load_store_op op = ins->load_store.op;
  70                 const char *name = load_store_opcode_names[op];
  71
  72                 assert(name);
  73                 printf("%s", name);
  74                 break;
  75         }
  76
  77         case TAG_TEXTURE_4: {
  78                 printf("texture");
  79                 break;
  80         }
  81
  82         default:
  83                 assert(0);
  84         }
  85
  86         ssa_args *args = &ins->ssa_args;
  87
  88         printf(" %d, ", args->dest);
  89
  90         mir_print_source(args->src0);
  91         printf(", ");
  92
  93         if (args->inline_constant)
  94                 printf("#%d", ins->inline_constant);
  95         else
  96                 mir_print_source(args->src1);
  97
  98         if (ins->has_constants)
  99                 printf(" <%f, %f, %f, %f>", ins->constants[0], ins->constants[1], ins->constants[2], ins->constants[3]);
 100
 101         printf("\n");
 102 }
 103
 104 /* Dumps MIR for a block or entire shader respective */
 105
 106 void
 107 mir_print_block(midgard_block *block)
 108 {
 109         printf("%p: {\n", block);
 110
 111         mir_foreach_instr_in_block(block, ins) {
 112                 mir_print_instruction(ins);
 113         }
 114
 115         printf("}");
 116
 117         if (block->nr_successors) {
 118                 printf(" -> ");
 119                 for (unsigned i = 0; i < block->nr_successors; ++i) {
 120                         printf("%p%s", block->successors[i],
 121                                         (i + 1) != block->nr_successors ? ", " : "");
 122                 }
 123         }
 124
 125         printf("\n\n");
 126 }
 127
 128 void
 129 mir_print_shader(compiler_context *ctx)
 130 {
 131         mir_foreach_block(ctx, block) {
 132                 mir_print_block(block);
 133         }
 134 }
 135
 136 void
 137 mir_print_bundle(midgard_bundle *bundle)
 138 {
 139         printf("[\n");
 140
 141         for (unsigned i = 0; i < bundle->instruction_count; ++i) {
 142                 midgard_instruction *ins = bundle->instructions[i];
 143                 mir_print_instruction(ins);
 144         }
 145
 146         printf("]\n");
 147 }