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eden/tools/maxwell-disas/main.cpp

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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
#include "common/assert.h"
#include <cstdlib>
#include <sys/stat.h>
#include <vector>
enum class Opcode {
#define INST(name, cute, encode) name,
#include "shader_recompiler/frontend/maxwell/maxwell.inc"
#undef INST
};
consteval std::pair<u64, u64> MaskValueFromEncoding(const char data[20]) noexcept {
u64 mask = 0, value = 0, bit = u64(1) << 63;
for (int i = 0; i < 20; ++i)
switch (data[i]) {
case '0':
mask |= bit;
bit >>= 1;
break;
case '1':
mask |= bit;
value |= bit;
bit >>= 1;
break;
case '-':
bit >>= 1;
break;
default:
break;
}
return { mask, value };
}
Opcode Decode(u64 insn) {
#define INST(name, cute, encode) \
if (auto const p = MaskValueFromEncoding(encode); (insn & p.first) == p.second) \
return Opcode::name;
#include "shader_recompiler/frontend/maxwell/maxwell.inc"
#undef INST
ASSERT_MSG(false, "Invalid insn 0x{:016x}", insn);
return Opcode::NOP;
}
const char* NameOf(Opcode opcode) {
constexpr const char* NAME_TABLE[] = {
#define INST(name, cute, encode) cute,
#include "shader_recompiler/frontend/maxwell/maxwell.inc"
#undef INST
};
ASSERT_MSG(size_t(opcode) < sizeof(NAME_TABLE) / sizeof(NAME_TABLE[0]), "Invalid opcode with raw value {}", int(opcode));
return NAME_TABLE[size_t(opcode)];
}
namespace Shader::Maxwell {
std::string_view SpecialRegGetName(size_t i) {
switch (i) {
case 0: return "SR_LANEID";
case 1: return "SR_CLOCK";
case 2: return "SR_VIRTCFG";
case 3: return "SR_VIRTID";
case 4: return "SR_PM0";
case 5: return "SR_PM1";
case 6: return "SR_PM2";
case 7: return "SR_PM3";
case 8: return "SR_PM4";
case 9: return "SR_PM5";
case 10: return "SR_PM6";
case 11: return "SR_PM7";
case 12: return "SR_?";
case 13: return "SR_?";
case 14: return "SR_?";
case 15: return "SR_ORDERING_TICKET";
case 16: return "SR_PRIM_TYPE";
case 17: return "SR_INVOCATION_ID";
case 18: return "SR_Y_DIRECTION";
case 19: return "SR_THREAD_KILL";
case 20: return "SM_SHADER_TYPE";
case 21: return "SR_DIRECTCBEWRITEADDRESSLOW";
case 22: return "SR_DIRECTCBEWRITEADDRESSHIGH";
case 23: return "SR_DIRECTCBEWRITEENABLED";
case 24: return "SR_MACHINE_ID_0";
case 25: return "SR_MACHINE_ID_1";
case 26: return "SR_MACHINE_ID_2";
case 27: return "SR_MACHINE_ID_3";
case 28: return "SR_AFFINITY";
case 29: return "SR_INVOCATION_INFO";
case 30: return "SR_WSCALEFACTOR_XY";
case 31: return "SR_WSCALEFACTOR_Z";
case 32: return "SR_TID";
case 33: return "SR_TID_X";
case 34: return "SR_TID_Y";
case 35: return "SR_TID_Z";
case 36: return "SR_CTA_PARAM";
case 37: return "SR_CTAID_X";
case 38: return "SR_CTAID_Y";
case 39: return "SR_CTAID_Z";
case 40: return "SR_NTID";
case 41: return "SR_CirQueueIncrMinusOne";
case 42: return "SR_NLATC";
case 43: return "SR_?";
case 44: return "SR_SM_SPA_VERSION";
case 45: return "SR_MULTIPASSSHADERINFO";
case 46: return "SR_LWINHI";
case 47: return "SR_SWINHI";
case 48: return "SR_SWINLO";
case 49: return "SR_SWINSZ";
case 50: return "SR_SMEMSZ";
case 51: return "SR_SMEMBANKS";
case 52: return "SR_LWINLO";
case 53: return "SR_LWINSZ";
case 54: return "SR_LMEMLOSZ";
case 55: return "SR_LMEMHIOFF";
case 56: return "SR_EQMASK";
case 57: return "SR_LTMASK";
case 58: return "SR_LEMASK";
case 59: return "SR_GTMASK";
case 60: return "SR_GEMASK";
case 61: return "SR_REGALLOC";
case 62: return "SR_BARRIERALLOC";
case 63: return "SR_?";
case 64: return "SR_GLOBALERRORSTATUS";
case 65: return "SR_?";
case 66: return "SR_WARPERRORSTATUS";
case 67: return "SR_WARPERRORSTATUSCLEAR";
case 68: return "SR_?";
case 69: return "SR_?";
case 70: return "SR_?";
case 71: return "SR_?";
case 72: return "SR_PM_HI0";
case 73: return "SR_PM_HI1";
case 74: return "SR_PM_HI2";
case 75: return "SR_PM_HI3";
case 76: return "SR_PM_HI4";
case 77: return "SR_PM_HI5";
case 78: return "SR_PM_HI6";
case 79: return "SR_PM_HI7";
case 80: return "SR_CLOCKLO";
case 81: return "SR_CLOCKHI";
case 82: return "SR_GLOBALTIMERLO";
case 83: return "SR_GLOBALTIMERHI";
case 84: return "SR_?";
case 85: return "SR_?";
case 86: return "SR_?";
case 87: return "SR_?";
case 88: return "SR_?";
case 89: return "SR_?";
case 90: return "SR_?";
case 91: return "SR_?";
case 92: return "SR_?";
case 93: return "SR_?";
case 94: return "SR_?";
case 95: return "SR_?";
case 96: return "SR_HWTASKID";
case 97: return "SR_CIRCULARQUEUEENTRYINDEX";
case 98: return "SR_CIRCULARQUEUEENTRYADDRESSLOW";
case 99: return "SR_CIRCULARQUEUEENTRYADDRESSHIGH";
default: return "SR_??"; }
}
}
#include "generated.cpp"
int DisasReferenceImpl(int argc, char *argv[]) {
std::vector<uint64_t> code;
FILE *fp = fopen(argv[1], "rb");
if (fp != NULL) {
struct stat st;
fstat(fileno(fp), &st);
auto const words = (size_t(st.st_size) / sizeof(uint64_t));
code.resize(words + 1);
fread(code.data(), sizeof(uint64_t), words, fp);
fclose(fp);
}
for (size_t i = 0; i < code.size(); ++i) {
printf("%016lx\t%-40s\n", code[i]
, Shader::Maxwell::DissasemblyFormat(code[i]).data()
);
}
return EXIT_SUCCESS;
}
int DisasShaderRecompilerImpl(int argc, char *argv[]) {
std::vector<u64> code;
FILE *fp = fopen(argv[1], "rb");
if (fp != NULL) {
struct stat st;
fstat(fileno(fp), &st);
auto const words = (size_t(st.st_size) / sizeof(u64));
code.resize(words + 1);
fread(code.data(), sizeof(u64), words, fp);
fclose(fp);
}
for (size_t i = 0; i < code.size(); ++i) {
auto const opcode = Decode(code[i]);
printf("%016lx\t%s\n", code[i], NameOf(opcode));
}
return EXIT_SUCCESS;
}
int main(int argc, char *argv[]) {
if (argc < 2) {
printf(
"usage: %s [input file] [-n/i]\n"
"Specify -n to use a disassembler that is NOT tied to the shader recompiler\n"
"aka. a reference disassembler\n"
, argv[0]);
return EXIT_FAILURE;
}
//DumpProgram
if (argc >= 3) {
if (::strcmp(argv[2], "-n") == 0 || ::strcmp(argv[2], "--new") == 0) {
return DisasReferenceImpl(argc, argv);
}
}
return DisasShaderRecompilerImpl(argc, argv);
}
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