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#include <array>
#include <iomanip>
#include "aco_ir.h"
#include "llvm-c/Disassembler.h"
#include "ac_llvm_util.h"
#include <llvm/ADT/StringRef.h>
#if LLVM_VERSION_MAJOR >= 11
#include <llvm/MC/MCDisassembler/MCDisassembler.h>
#endif
namespace aco {
/* LLVM disassembler only supports GFX8+, try to disassemble with CLRXdisasm
* for GFX6-GFX7 if found on the system, this is better than nothing.
*/
void print_asm_gfx6_gfx7(Program *program, std::vector<uint32_t>& binary,
std::ostream& out)
{
char path[] = "/tmp/fileXXXXXX";
char line[2048], command[128];
const char *gpu_type;
FILE *p;
int fd;
/* Dump the binary into a temporary file. */
fd = mkstemp(path);
if (fd < 0)
return;
for (uint32_t w : binary)
{
if (write(fd, &w, sizeof(w)) == -1)
goto fail;
}
/* Determine the GPU type for CLRXdisasm. Use the family for GFX6 chips
* because it doesn't allow to use gfx600 directly.
*/
switch (program->chip_class) {
case GFX6:
switch (program->family) {
case CHIP_TAHITI:
gpu_type = "tahiti";
break;
case CHIP_PITCAIRN:
gpu_type = "pitcairn";
break;
case CHIP_VERDE:
gpu_type = "capeverde";
break;
case CHIP_OLAND:
gpu_type = "oland";
break;
case CHIP_HAINAN:
gpu_type = "hainan";
break;
default:
unreachable("Invalid GFX6 family!");
}
break;
case GFX7:
gpu_type = "gfx700";
break;
default:
unreachable("Invalid chip class!");
}
sprintf(command, "clrxdisasm --gpuType=%s -r %s", gpu_type, path);
p = popen(command, "r");
if (p) {
if (!fgets(line, sizeof(line), p)) {
out << "clrxdisasm not found\n";
pclose(p);
goto fail;
}
do {
out << line;
} while (fgets(line, sizeof(line), p));
pclose(p);
}
fail:
close(fd);
unlink(path);
}
void print_asm(Program *program, std::vector<uint32_t>& binary,
unsigned exec_size, std::ostream& out)
{
if (program->chip_class <= GFX7) {
print_asm_gfx6_gfx7(program, binary, out);
return;
}
std::vector<bool> referenced_blocks(program->blocks.size());
referenced_blocks[0] = true;
for (Block& block : program->blocks) {
for (unsigned succ : block.linear_succs)
referenced_blocks[succ] = true;
}
#if LLVM_VERSION_MAJOR >= 11
std::vector<llvm::SymbolInfoTy> symbols;
#else
std::vector<std::tuple<uint64_t, llvm::StringRef, uint8_t>> symbols;
#endif
std::vector<std::array<char,16>> block_names;
block_names.reserve(program->blocks.size());
for (Block& block : program->blocks) {
if (!referenced_blocks[block.index])
continue;
std::array<char, 16> name;
sprintf(name.data(), "BB%u", block.index);
block_names.push_back(name);
symbols.emplace_back(block.offset * 4, llvm::StringRef(block_names[block_names.size() - 1].data()), 0);
}
const char *features = "";
if (program->chip_class >= GFX10 && program->wave_size == 64) {
features = "+wavefrontsize64";
}
LLVMDisasmContextRef disasm = LLVMCreateDisasmCPUFeatures("amdgcn-mesa-mesa3d",
ac_get_llvm_processor_name(program->family),
features,
&symbols, 0, NULL, NULL);
char outline[1024];
size_t pos = 0;
bool invalid = false;
unsigned next_block = 0;
while (pos < exec_size) {
while (next_block < program->blocks.size() && pos == program->blocks[next_block].offset) {
if (referenced_blocks[next_block])
out << "BB" << std::dec << next_block << ":" << std::endl;
next_block++;
}
/* mask out src2 on v_writelane_b32 */
if (((program->chip_class == GFX8 || program->chip_class == GFX9) && (binary[pos] & 0xffff8000) == 0xd28a0000) ||
(program->chip_class >= GFX10 && (binary[pos] & 0xffff8000) == 0xd7610000)) {
binary[pos+1] = binary[pos+1] & 0xF803FFFF;
}
size_t l = LLVMDisasmInstruction(disasm, (uint8_t *) &binary[pos],
(exec_size - pos) * sizeof(uint32_t), pos * 4,
outline, sizeof(outline));
size_t new_pos;
const int align_width = 60;
if (!l &&
((program->chip_class >= GFX9 && (binary[pos] & 0xffff8000) == 0xd1348000) || /* v_add_u32_e64 + clamp */
(program->chip_class >= GFX10 && (binary[pos] & 0xffff8000) == 0xd7038000) || /* v_add_u16_e64 + clamp */
(program->chip_class <= GFX9 && (binary[pos] & 0xffff8000) == 0xd1268000)) /* v_add_u16_e64 + clamp */) {
out << std::left << std::setw(align_width) << std::setfill(' ') << "\tinteger addition + clamp";
bool has_literal = program->chip_class >= GFX10 &&
(((binary[pos+1] & 0x1ff) == 0xff) || (((binary[pos+1] >> 9) & 0x1ff) == 0xff));
new_pos = pos + 2 + has_literal;
} else if (program->chip_class >= GFX10 && l == 4 && ((binary[pos] & 0xfe0001ff) == 0x020000f9)) {
out << std::left << std::setw(align_width) << std::setfill(' ') << "\tv_cndmask_b32 + sdwa";
new_pos = pos + 2;
} else if (!l) {
out << std::left << std::setw(align_width) << std::setfill(' ') << "(invalid instruction)";
new_pos = pos + 1;
invalid = true;
} else {
out << std::left << std::setw(align_width) << std::setfill(' ') << outline;
assert(l % 4 == 0);
new_pos = pos + l / 4;
}
out << std::right;
out << " ;";
for (; pos < new_pos; pos++)
out << " " << std::setfill('0') << std::setw(8) << std::hex << binary[pos];
out << std::endl;
}
out << std::setfill(' ') << std::setw(0) << std::dec;
assert(next_block == program->blocks.size());
LLVMDisasmDispose(disasm);
if (program->constant_data.size()) {
out << std::endl << "/* constant data */" << std::endl;
for (unsigned i = 0; i < program->constant_data.size(); i += 32) {
out << '[' << std::setw(6) << std::setfill('0') << std::dec << i << ']';
unsigned line_size = std::min<size_t>(program->constant_data.size() - i, 32);
for (unsigned j = 0; j < line_size; j += 4) {
unsigned size = std::min<size_t>(program->constant_data.size() - (i + j), 4);
uint32_t v = 0;
memcpy(&v, &program->constant_data[i + j], size);
out << " " << std::setw(8) << std::setfill('0') << std::hex << v;
}
out << std::endl;
}
}
out << std::setfill(' ') << std::setw(0) << std::dec;
if (invalid) {
/* Invalid instructions usually lead to GPU hangs, which can make
* getting the actual invalid instruction hard. Abort here so that we
* can find the problem.
*/
abort();
}
}
}
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