src/amd/compiler/aco_print_asm.cpp

   1 #include <array>
   2 #include <iomanip>
   3 #include "aco_ir.h"
   4 #include "llvm-c/Disassembler.h"
   5 #include "ac_llvm_util.h"
   6
   7 #include <llvm/ADT/StringRef.h>
   8
   9 namespace aco {
  10
  11 void print_asm(Program *program, std::vector<uint32_t>& binary,
  12                unsigned exec_size, std::ostream& out)
  13 {
  14    std::vector<bool> referenced_blocks(program->blocks.size());
  15    referenced_blocks[0] = true;
  16    for (Block& block : program->blocks) {
  17       for (unsigned succ : block.linear_succs)
  18          referenced_blocks[succ] = true;
  19    }
  20
  21    std::vector<std::tuple<uint64_t, llvm::StringRef, uint8_t>> symbols;
  22    std::vector<std::array<char,16>> block_names;
  23    block_names.reserve(program->blocks.size());
  24    for (Block& block : program->blocks) {
  25       if (!referenced_blocks[block.index])
  26          continue;
  27       std::array<char, 16> name;
  28       sprintf(name.data(), "BB%u", block.index);
  29       block_names.push_back(name);
  30       symbols.emplace_back(block.offset * 4, llvm::StringRef(block_names[block_names.size() - 1].data()), 0);
  31    }
  32
  33    const char *features = "";
  34    if (program->chip_class >= GFX10 && program->wave_size == 64) {
  35       features = "+wavefrontsize64";
  36    }
  37
  38    LLVMDisasmContextRef disasm = LLVMCreateDisasmCPUFeatures("amdgcn-mesa-mesa3d",
  39                                                              ac_get_llvm_processor_name(program->family),
  40                                                              features,
  41                                                              &symbols, 0, NULL, NULL);
  42
  43    char outline[1024];
  44    size_t pos = 0;
  45    bool invalid = false;
  46    unsigned next_block = 0;
  47    while (pos < exec_size) {
  48       while (next_block < program->blocks.size() && pos == program->blocks[next_block].offset) {
  49          if (referenced_blocks[next_block])
  50             out << "BB" << std::dec << next_block << ":" << std::endl;
  51          next_block++;
  52       }
  53
  54       /* mask out src2 on v_writelane_b32 */
  55       if (((program->chip_class == GFX8 || program->chip_class == GFX9) && (binary[pos] & 0xffff8000) == 0xd28a0000) ||
  56           (program->chip_class == GFX10 && (binary[pos] & 0xffff8000) == 0xd7610000)) {
  57          binary[pos+1] = binary[pos+1] & 0xF803FFFF;
  58       }
  59
  60       size_t l = LLVMDisasmInstruction(disasm, (uint8_t *) &binary[pos],
  61                                        (exec_size - pos) * sizeof(uint32_t), pos * 4,
  62                                        outline, sizeof(outline));
  63
  64       size_t new_pos;
  65       const int align_width = 60;
  66       if (!l && program->chip_class == GFX9 && ((binary[pos] & 0xffff8000) == 0xd1348000)) { /* not actually an invalid instruction */
  67          out << std::left << std::setw(align_width) << std::setfill(' ') << "\tv_add_u32_e64 + clamp";
  68          new_pos = pos + 2;
  69       } else if (!l) {
  70          out << std::left << std::setw(align_width) << std::setfill(' ') << "(invalid instruction)";
  71          new_pos = pos + 1;
  72          invalid = true;
  73       } else {
  74          out << std::left << std::setw(align_width) << std::setfill(' ') << outline;
  75          assert(l % 4 == 0);
  76          new_pos = pos + l / 4;
  77       }
  78       out << std::right;
  79
  80       out << " ;";
  81       for (; pos < new_pos; pos++)
  82          out << " " << std::setfill('0') << std::setw(8) << std::hex << binary[pos];
  83       out << std::endl;
  84    }
  85    out << std::setfill(' ') << std::setw(0) << std::dec;
  86    assert(next_block == program->blocks.size());
  87
  88    LLVMDisasmDispose(disasm);
  89
  90    if (program->constant_data.size()) {
  91       out << std::endl << "/* constant data */" << std::endl;
  92       for (unsigned i = 0; i < program->constant_data.size(); i += 32) {
  93          out << '[' << std::setw(6) << std::setfill('0') << std::dec << i << ']';
  94          unsigned line_size = std::min<size_t>(program->constant_data.size() - i, 32);
  95          for (unsigned j = 0; j < line_size; j += 4) {
  96             unsigned size = std::min<size_t>(program->constant_data.size() - (i + j), 4);
  97             uint32_t v = 0;
  98             memcpy(&v, &program->constant_data[i + j], size);
  99             out << " " << std::setw(8) << std::setfill('0') << std::hex << v;
 100          }
 101          out << std::endl;
 102       }
 103    }
 104
 105    out << std::setfill(' ') << std::setw(0) << std::dec;
 106
 107    if (invalid) {
 108       /* Invalid instructions usually lead to GPU hangs, which can make
 109        * getting the actual invalid instruction hard. Abort here so that we
 110        * can find the problem.
 111        */
 112       abort();
 113    }
 114 }
 115
 116 }