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yuzu/externals/dynarmic/tests/A32/fuzz_arm.cpp

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/* This file is part of the dynarmic project.
* Copyright (c) 2016 MerryMage
* SPDX-License-Identifier: 0BSD
*/
#include <algorithm>
#include <array>
#include <cstdio>
#include <functional>
#include <tuple>
#include <vector>
#include <catch.hpp>
#include "../fuzz_util.h"
#include "../rand_int.h"
#include "../unicorn_emu/a32_unicorn.h"
#include "./testenv.h"
#include "dynarmic/common/common_types.h"
#include "dynarmic/common/fp/fpcr.h"
#include "dynarmic/common/fp/fpsr.h"
#include "dynarmic/common/llvm_disassemble.h"
#include "dynarmic/common/scope_exit.h"
#include "dynarmic/frontend/A32/ITState.h"
#include "dynarmic/frontend/A32/location_descriptor.h"
#include "dynarmic/frontend/A32/translate/translate.h"
#include "dynarmic/frontend/A32/types.h"
#include "dynarmic/interface/A32/a32.h"
#include "dynarmic/ir/basic_block.h"
#include "dynarmic/ir/location_descriptor.h"
#include "dynarmic/ir/opcodes.h"
// Must be declared last for all necessary operator<< to be declared prior to this.
#include <fmt/format.h>
#include <fmt/ostream.h>
namespace {
using namespace Dynarmic;
bool ShouldTestInst(u32 instruction, u32 pc, bool is_thumb, bool is_last_inst, A32::ITState it_state = {}) {
const A32::LocationDescriptor location = A32::LocationDescriptor{pc, {}, {}}.SetTFlag(is_thumb).SetIT(it_state);
IR::Block block{location};
const bool should_continue = A32::TranslateSingleInstruction(block, location, instruction);
if (!should_continue && !is_last_inst) {
return false;
}
if (auto terminal = block.GetTerminal(); boost::get<IR::Term::Interpret>(&terminal)) {
return false;
}
for (const auto& ir_inst : block) {
switch (ir_inst.GetOpcode()) {
case IR::Opcode::A32ExceptionRaised:
case IR::Opcode::A32CallSupervisor:
case IR::Opcode::A32CoprocInternalOperation:
case IR::Opcode::A32CoprocSendOneWord:
case IR::Opcode::A32CoprocSendTwoWords:
case IR::Opcode::A32CoprocGetOneWord:
case IR::Opcode::A32CoprocGetTwoWords:
case IR::Opcode::A32CoprocLoadWords:
case IR::Opcode::A32CoprocStoreWords:
return false;
// Currently unimplemented in Unicorn
case IR::Opcode::FPVectorRecipEstimate16:
case IR::Opcode::FPVectorRSqrtEstimate16:
case IR::Opcode::VectorPolynomialMultiplyLong64:
return false;
default:
continue;
}
}
return true;
}
u32 GenRandomArmInst(u32 pc, bool is_last_inst) {
static const struct InstructionGeneratorInfo {
std::vector<InstructionGenerator> generators;
std::vector<InstructionGenerator> invalid;
} instructions = [] {
const std::vector<std::tuple<std::string, const char*>> list{
#define INST(fn, name, bitstring) {#fn, bitstring},
#include "dynarmic/frontend/A32/decoder/arm.inc"
#include "dynarmic/frontend/A32/decoder/asimd.inc"
#include "dynarmic/frontend/A32/decoder/vfp.inc"
#undef INST
};
std::vector<InstructionGenerator> generators;
std::vector<InstructionGenerator> invalid;
// List of instructions not to test
static constexpr std::array do_not_test{
// Translating load/stores
"arm_LDRBT", "arm_LDRBT", "arm_LDRHT", "arm_LDRHT", "arm_LDRSBT", "arm_LDRSBT", "arm_LDRSHT", "arm_LDRSHT", "arm_LDRT", "arm_LDRT",
"arm_STRBT", "arm_STRBT", "arm_STRHT", "arm_STRHT", "arm_STRT", "arm_STRT",
// Exclusive load/stores
"arm_LDREXB", "arm_LDREXD", "arm_LDREXH", "arm_LDREX", "arm_LDAEXB", "arm_LDAEXD", "arm_LDAEXH", "arm_LDAEX",
"arm_STREXB", "arm_STREXD", "arm_STREXH", "arm_STREX", "arm_STLEXB", "arm_STLEXD", "arm_STLEXH", "arm_STLEX",
"arm_SWP", "arm_SWPB",
// Elevated load/store multiple instructions.
"arm_LDM_eret", "arm_LDM_usr",
"arm_STM_usr",
// Hint instructions
"arm_NOP", "arm_PLD_imm", "arm_PLD_reg", "arm_SEV",
"arm_WFE", "arm_WFI", "arm_YIELD",
// E, T, J
"arm_BLX_reg", "arm_BLX_imm", "arm_BXJ", "arm_SETEND",
// Coprocessor
"arm_CDP", "arm_LDC", "arm_MCR", "arm_MCRR", "arm_MRC", "arm_MRRC", "arm_STC",
// System
"arm_CPS", "arm_RFE", "arm_SRS",
// Undefined
"arm_UDF",
// FPSCR is inaccurate
"vfp_VMRS",
// Incorrect Unicorn implementations
"asimd_VRECPS", // Unicorn does not fuse the multiply and subtraction, resulting in being off by 1ULP.
"asimd_VRSQRTS", // Unicorn does not fuse the multiply and subtraction, resulting in being off by 1ULP.
"vfp_VCVT_from_fixed", // Unicorn does not do round-to-nearest-even for this instruction correctly.
};
for (const auto& [fn, bitstring] : list) {
if (std::find(do_not_test.begin(), do_not_test.end(), fn) != do_not_test.end()) {
invalid.emplace_back(InstructionGenerator{bitstring});
continue;
}
generators.emplace_back(InstructionGenerator{bitstring});
}
return InstructionGeneratorInfo{generators, invalid};
}();
while (true) {
const size_t index = RandInt<size_t>(0, instructions.generators.size() - 1);
const u32 inst = instructions.generators[index].Generate();
if ((instructions.generators[index].Mask() & 0xF0000000) == 0 && (inst & 0xF0000000) == 0xF0000000) {
continue;
}
if (ShouldTestInst(inst, pc, false, is_last_inst)) {
return inst;
}
}
}
std::vector<u16> GenRandomThumbInst(u32 pc, bool is_last_inst, A32::ITState it_state = {}) {
static const struct InstructionGeneratorInfo {
std::vector<InstructionGenerator> generators;
std::vector<InstructionGenerator> invalid;
} instructions = [] {
const std::vector<std::tuple<std::string, const char*>> list{
#define INST(fn, name, bitstring) {#fn, bitstring},
#include "dynarmic/frontend/A32/decoder/thumb16.inc"
#include "dynarmic/frontend/A32/decoder/thumb32.inc"
#undef INST
};
const std::vector<std::tuple<std::string, const char*>> vfp_list{
#define INST(fn, name, bitstring) {#fn, bitstring},
#include "dynarmic/frontend/A32/decoder/vfp.inc"
#undef INST
};
const std::vector<std::tuple<std::string, const char*>> asimd_list{
#define INST(fn, name, bitstring) {#fn, bitstring},
#include "dynarmic/frontend/A32/decoder/asimd.inc"
#undef INST
};
std::vector<InstructionGenerator> generators;
std::vector<InstructionGenerator> invalid;
// List of instructions not to test
static constexpr std::array do_not_test{
"thumb16_BKPT",
"thumb16_IT",
"thumb16_SETEND",
// Exclusive load/stores
"thumb32_LDREX",
"thumb32_LDREXB",
"thumb32_LDREXD",
"thumb32_LDREXH",
"thumb32_STREX",
"thumb32_STREXB",
"thumb32_STREXD",
"thumb32_STREXH",
// FPSCR is inaccurate
"vfp_VMRS",
// Unicorn is incorrect?
"thumb32_MRS_reg",
// Unicorn has incorrect implementation (incorrect rounding and unsets CPSR.T??)
"vfp_VCVT_to_fixed",
"vfp_VCVT_from_fixed",
"asimd_VRECPS", // Unicorn does not fuse the multiply and subtraction, resulting in being off by 1ULP.
"asimd_VRSQRTS", // Unicorn does not fuse the multiply and subtraction, resulting in being off by 1ULP.
// Coprocessor
"thumb32_CDP",
"thumb32_LDC",
"thumb32_MCR",
"thumb32_MCRR",
"thumb32_MRC",
"thumb32_MRRC",
"thumb32_STC",
};
for (const auto& [fn, bitstring] : list) {
if (std::find(do_not_test.begin(), do_not_test.end(), fn) != do_not_test.end()) {
invalid.emplace_back(InstructionGenerator{bitstring});
continue;
}
generators.emplace_back(InstructionGenerator{bitstring});
}
for (const auto& [fn, bs] : vfp_list) {
std::string bitstring = bs;
if (bitstring.substr(0, 4) == "cccc" || bitstring.substr(0, 4) == "----") {
bitstring.replace(0, 4, "1110");
}
if (std::find(do_not_test.begin(), do_not_test.end(), fn) != do_not_test.end()) {
invalid.emplace_back(InstructionGenerator{bitstring.c_str()});
continue;
}
generators.emplace_back(InstructionGenerator{bitstring.c_str()});
}
for (const auto& [fn, bs] : asimd_list) {
std::string bitstring = bs;
if (bitstring.substr(0, 7) == "1111001") {
const char U = bitstring[7];
bitstring.replace(0, 8, "111-1111");
bitstring[3] = U;
} else if (bitstring.substr(0, 8) == "11110100") {
bitstring.replace(0, 8, "11111001");
} else {
ASSERT_FALSE("Unhandled ASIMD instruction: {} {}", fn, bs);
}
if (std::find(do_not_test.begin(), do_not_test.end(), fn) != do_not_test.end()) {
invalid.emplace_back(InstructionGenerator{bitstring.c_str()});
continue;
}
generators.emplace_back(InstructionGenerator{bitstring.c_str()});
}
return InstructionGeneratorInfo{generators, invalid};
}();
while (true) {
const size_t index = RandInt<size_t>(0, instructions.generators.size() - 1);
const u32 inst = instructions.generators[index].Generate();
const bool is_four_bytes = (inst >> 16) != 0;
if (ShouldTestInst(is_four_bytes ? Common::SwapHalves32(inst) : inst, pc, true, is_last_inst, it_state)) {
if (is_four_bytes)
return {static_cast<u16>(inst >> 16), static_cast<u16>(inst)};
return {static_cast<u16>(inst)};
}
}
}
template<typename TestEnv>
Dynarmic::A32::UserConfig GetUserConfig(TestEnv& testenv) {
Dynarmic::A32::UserConfig user_config;
user_config.optimizations &= ~OptimizationFlag::FastDispatch;
user_config.callbacks = &testenv;
user_config.always_little_endian = true;
return user_config;
}
template<typename TestEnv>
static void RunTestInstance(Dynarmic::A32::Jit& jit,
A32Unicorn<TestEnv>& uni,
TestEnv& jit_env,
TestEnv& uni_env,
const typename A32Unicorn<TestEnv>::RegisterArray& regs,
const typename A32Unicorn<TestEnv>::ExtRegArray& vecs,
const std::vector<typename TestEnv::InstructionType>& instructions,
const u32 cpsr,
const u32 fpscr,
const size_t ticks_left) {
const u32 initial_pc = regs[15];
const u32 num_words = initial_pc / sizeof(typename TestEnv::InstructionType);
const u32 code_mem_size = num_words + static_cast<u32>(instructions.size());
jit_env.code_mem.resize(code_mem_size);
uni_env.code_mem.resize(code_mem_size);
std::fill(jit_env.code_mem.begin(), jit_env.code_mem.end(), TestEnv::infinite_loop);
std::fill(uni_env.code_mem.begin(), uni_env.code_mem.end(), TestEnv::infinite_loop);
std::copy(instructions.begin(), instructions.end(), jit_env.code_mem.begin() + num_words);
std::copy(instructions.begin(), instructions.end(), uni_env.code_mem.begin() + num_words);
jit_env.PadCodeMem();
uni_env.PadCodeMem();
jit_env.modified_memory.clear();
uni_env.modified_memory.clear();
jit_env.interrupts.clear();
uni_env.interrupts.clear();
jit.Regs() = regs;
jit.ExtRegs() = vecs;
jit.SetFpscr(fpscr);
jit.SetCpsr(cpsr);
jit.ClearCache();
uni.SetRegisters(regs);
uni.SetExtRegs(vecs);
uni.SetFpscr(fpscr);
uni.EnableFloatingPointAccess();
uni.SetCpsr(cpsr);
uni.ClearPageCache();
jit_env.ticks_left = ticks_left;
jit.Run();
uni_env.ticks_left = instructions.size(); // Unicorn counts thumb instructions weirdly.
uni.Run();
SCOPE_FAIL {
fmt::print("Instruction Listing:\n");
fmt::print("{}\n", Common::DisassembleAArch32(std::is_same_v<TestEnv, ThumbTestEnv>, initial_pc, (const u8*)instructions.data(), instructions.size() * sizeof(instructions[0])));
fmt::print("Initial register listing:\n");
for (size_t i = 0; i < regs.size(); ++i) {
fmt::print("{:3s}: {:08x}\n", static_cast<A32::Reg>(i), regs[i]);
}
for (size_t i = 0; i < vecs.size(); ++i) {
fmt::print("{:3s}: {:08x}\n", static_cast<A32::ExtReg>(i), vecs[i]);
}
fmt::print("cpsr {:08x}\n", cpsr);
fmt::print("fpcr {:08x}\n", fpscr);
fmt::print("fpcr.AHP {}\n", FP::FPCR{fpscr}.AHP());
fmt::print("fpcr.DN {}\n", FP::FPCR{fpscr}.DN());
fmt::print("fpcr.FZ {}\n", FP::FPCR{fpscr}.FZ());
fmt::print("fpcr.RMode {}\n", static_cast<size_t>(FP::FPCR{fpscr}.RMode()));
fmt::print("fpcr.FZ16 {}\n", FP::FPCR{fpscr}.FZ16());
fmt::print("\n");
fmt::print("Final register listing:\n");
fmt::print(" unicorn dynarmic\n");
const auto uni_regs = uni.GetRegisters();
for (size_t i = 0; i < regs.size(); ++i) {
fmt::print("{:3s}: {:08x} {:08x} {}\n", static_cast<A32::Reg>(i), uni_regs[i], jit.Regs()[i], uni_regs[i] != jit.Regs()[i] ? "*" : "");
}
const auto uni_ext_regs = uni.GetExtRegs();
for (size_t i = 0; i < vecs.size(); ++i) {
fmt::print("s{:2d}: {:08x} {:08x} {}\n", static_cast<size_t>(i), uni_ext_regs[i], jit.ExtRegs()[i], uni_ext_regs[i] != jit.ExtRegs()[i] ? "*" : "");
}
fmt::print("cpsr {:08x} {:08x} {}\n", uni.GetCpsr(), jit.Cpsr(), uni.GetCpsr() != jit.Cpsr() ? "*" : "");
fmt::print("fpsr {:08x} {:08x} {}\n", uni.GetFpscr(), jit.Fpscr(), (uni.GetFpscr() & 0xF0000000) != (jit.Fpscr() & 0xF0000000) ? "*" : "");
fmt::print("\n");
fmt::print("Modified memory:\n");
fmt::print(" uni dyn\n");
auto uni_iter = uni_env.modified_memory.begin();
auto jit_iter = jit_env.modified_memory.begin();
while (uni_iter != uni_env.modified_memory.end() || jit_iter != jit_env.modified_memory.end()) {
if (uni_iter == uni_env.modified_memory.end() || (jit_iter != jit_env.modified_memory.end() && uni_iter->first > jit_iter->first)) {
fmt::print("{:08x}: {:02x} *\n", jit_iter->first, jit_iter->second);
jit_iter++;
} else if (jit_iter == jit_env.modified_memory.end() || jit_iter->first > uni_iter->first) {
fmt::print("{:08x}: {:02x} *\n", uni_iter->first, uni_iter->second);
uni_iter++;
} else if (uni_iter->first == jit_iter->first) {
fmt::print("{:08x}: {:02x} {:02x} {}\n", uni_iter->first, uni_iter->second, jit_iter->second, uni_iter->second != jit_iter->second ? "*" : "");
uni_iter++;
jit_iter++;
}
}
fmt::print("\n");
fmt::print("x86_64:\n");
fmt::print("{}\n", jit.Disassemble());
fmt::print("Interrupts:\n");
for (const auto& i : uni_env.interrupts) {
std::puts(i.c_str());
}
};
REQUIRE(uni_env.code_mem_modified_by_guest == jit_env.code_mem_modified_by_guest);
if (uni_env.code_mem_modified_by_guest) {
return;
}
// Qemu doesn't do Thumb transitions??
{
const u32 uni_pc = uni.GetPC();
const bool is_thumb = (jit.Cpsr() & (1 << 5)) != 0;
const u32 new_uni_pc = uni_pc & (is_thumb ? 0xFFFFFFFE : 0xFFFFFFFC);
uni.SetPC(new_uni_pc);
}
REQUIRE(uni.GetRegisters() == jit.Regs());
REQUIRE(uni.GetExtRegs() == jit.ExtRegs());
REQUIRE((uni.GetCpsr() & 0xFFFFFDDF) == (jit.Cpsr() & 0xFFFFFDDF));
REQUIRE((uni.GetFpscr() & 0xF0000000) == (jit.Fpscr() & 0xF0000000));
REQUIRE(uni_env.modified_memory == jit_env.modified_memory);
REQUIRE(uni_env.interrupts.empty());
}
} // Anonymous namespace
TEST_CASE("A32: Single random arm instruction", "[arm]") {
ArmTestEnv jit_env{};
ArmTestEnv uni_env{};
Dynarmic::A32::Jit jit{GetUserConfig(jit_env)};
A32Unicorn<ArmTestEnv> uni{uni_env};
A32Unicorn<ArmTestEnv>::RegisterArray regs;
A32Unicorn<ArmTestEnv>::ExtRegArray ext_reg;
std::vector<u32> instructions(1);
for (size_t iteration = 0; iteration < 100000; ++iteration) {
std::generate(regs.begin(), regs.end(), [] { return RandInt<u32>(0, ~u32(0)); });
std::generate(ext_reg.begin(), ext_reg.end(), [] { return RandInt<u32>(0, ~u32(0)); });
instructions[0] = GenRandomArmInst(0, true);
const u32 start_address = 100;
const u32 cpsr = (RandInt<u32>(0, 0xF) << 28) | 0x10;
const u32 fpcr = RandomFpcr();
INFO("Instruction: 0x" << std::hex << instructions[0]);
regs[15] = start_address;
RunTestInstance(jit, uni, jit_env, uni_env, regs, ext_reg, instructions, cpsr, fpcr, 1);
}
}
TEST_CASE("A32: Small random arm block", "[arm]") {
ArmTestEnv jit_env{};
ArmTestEnv uni_env{};
Dynarmic::A32::Jit jit{GetUserConfig(jit_env)};
A32Unicorn<ArmTestEnv> uni{uni_env};
A32Unicorn<ArmTestEnv>::RegisterArray regs;
A32Unicorn<ArmTestEnv>::ExtRegArray ext_reg;
std::vector<u32> instructions(5);
for (size_t iteration = 0; iteration < 100000; ++iteration) {
std::generate(regs.begin(), regs.end(), [] { return RandInt<u32>(0, ~u32(0)); });
std::generate(ext_reg.begin(), ext_reg.end(), [] { return RandInt<u32>(0, ~u32(0)); });
instructions[0] = GenRandomArmInst(0, false);
instructions[1] = GenRandomArmInst(4, false);
instructions[2] = GenRandomArmInst(8, false);
instructions[3] = GenRandomArmInst(12, false);
instructions[4] = GenRandomArmInst(16, true);
const u32 start_address = 100;
const u32 cpsr = (RandInt<u32>(0, 0xF) << 28) | 0x10;
const u32 fpcr = RandomFpcr();
INFO("Instruction 1: 0x" << std::hex << instructions[0]);
INFO("Instruction 2: 0x" << std::hex << instructions[1]);
INFO("Instruction 3: 0x" << std::hex << instructions[2]);
INFO("Instruction 4: 0x" << std::hex << instructions[3]);
INFO("Instruction 5: 0x" << std::hex << instructions[4]);
regs[15] = start_address;
RunTestInstance(jit, uni, jit_env, uni_env, regs, ext_reg, instructions, cpsr, fpcr, 5);
}
}
TEST_CASE("A32: Large random arm block", "[arm]") {
ArmTestEnv jit_env{};
ArmTestEnv uni_env{};
Dynarmic::A32::Jit jit{GetUserConfig(jit_env)};
A32Unicorn<ArmTestEnv> uni{uni_env};
A32Unicorn<ArmTestEnv>::RegisterArray regs;
A32Unicorn<ArmTestEnv>::ExtRegArray ext_reg;
constexpr size_t instruction_count = 100;
std::vector<u32> instructions(instruction_count);
for (size_t iteration = 0; iteration < 10000; ++iteration) {
std::generate(regs.begin(), regs.end(), [] { return RandInt<u32>(0, ~u32(0)); });
std::generate(ext_reg.begin(), ext_reg.end(), [] { return RandInt<u32>(0, ~u32(0)); });
for (size_t j = 0; j < instruction_count; ++j) {
instructions[j] = GenRandomArmInst(j * 4, j == instruction_count - 1);
}
const u64 start_address = 100;
const u32 cpsr = (RandInt<u32>(0, 0xF) << 28) | 0x10;
const u32 fpcr = RandomFpcr();
regs[15] = start_address;
RunTestInstance(jit, uni, jit_env, uni_env, regs, ext_reg, instructions, cpsr, fpcr, 100);
}
}
TEST_CASE("A32: Single random thumb instruction", "[thumb]") {
ThumbTestEnv jit_env{};
ThumbTestEnv uni_env{};
Dynarmic::A32::Jit jit{GetUserConfig(jit_env)};
A32Unicorn<ThumbTestEnv> uni{uni_env};
A32Unicorn<ThumbTestEnv>::RegisterArray regs;
A32Unicorn<ThumbTestEnv>::ExtRegArray ext_reg;
std::vector<u16> instructions;
for (size_t iteration = 0; iteration < 100000; ++iteration) {
std::generate(regs.begin(), regs.end(), [] { return RandInt<u32>(0, ~u32(0)); });
std::generate(ext_reg.begin(), ext_reg.end(), [] { return RandInt<u32>(0, ~u32(0)); });
instructions = GenRandomThumbInst(0, true);
const u32 start_address = 100;
const u32 cpsr = (RandInt<u32>(0, 0xF) << 28) | 0x1F0;
const u32 fpcr = RandomFpcr();
INFO("Instruction: 0x" << std::hex << instructions[0]);
regs[15] = start_address;
RunTestInstance(jit, uni, jit_env, uni_env, regs, ext_reg, instructions, cpsr, fpcr, 1);
}
}
TEST_CASE("A32: Small random thumb block", "[thumb]") {
ThumbTestEnv jit_env{};
ThumbTestEnv uni_env{};
Dynarmic::A32::Jit jit{GetUserConfig(jit_env)};
A32Unicorn<ThumbTestEnv> uni{uni_env};
A32Unicorn<ThumbTestEnv>::RegisterArray regs;
A32Unicorn<ThumbTestEnv>::ExtRegArray ext_reg;
std::vector<u16> instructions;
for (size_t iteration = 0; iteration < 100000; ++iteration) {
std::generate(regs.begin(), regs.end(), [] { return RandInt<u32>(0, ~u32(0)); });
std::generate(ext_reg.begin(), ext_reg.end(), [] { return RandInt<u32>(0, ~u32(0)); });
instructions.clear();
for (size_t i = 0; i < 5; i++) {
const std::vector<u16> inst = GenRandomThumbInst(instructions.size() * 2, i == 4);
instructions.insert(instructions.end(), inst.begin(), inst.end());
}
const u32 start_address = 100;
const u32 cpsr = (RandInt<u32>(0, 0xF) << 28) | 0x1F0;
const u32 fpcr = RandomFpcr();
regs[15] = start_address;
RunTestInstance(jit, uni, jit_env, uni_env, regs, ext_reg, instructions, cpsr, fpcr, 5);
}
}
TEST_CASE("A32: Test thumb IT instruction", "[thumb]") {
ThumbTestEnv jit_env{};
ThumbTestEnv uni_env{};
Dynarmic::A32::Jit jit{GetUserConfig(jit_env)};
A32Unicorn<ThumbTestEnv> uni{uni_env};
A32Unicorn<ThumbTestEnv>::RegisterArray regs;
A32Unicorn<ThumbTestEnv>::ExtRegArray ext_reg;
std::vector<u16> instructions;
for (size_t iteration = 0; iteration < 100000; ++iteration) {
std::generate(regs.begin(), regs.end(), [] { return RandInt<u32>(0, ~u32(0)); });
std::generate(ext_reg.begin(), ext_reg.end(), [] { return RandInt<u32>(0, ~u32(0)); });
const size_t pre_instructions = RandInt<size_t>(0, 3);
const size_t post_instructions = RandInt<size_t>(5, 8);
instructions.clear();
for (size_t i = 0; i < pre_instructions; i++) {
const std::vector<u16> inst = GenRandomThumbInst(instructions.size() * 2, false);
instructions.insert(instructions.end(), inst.begin(), inst.end());
}
// Emit IT instruction
A32::ITState it_state = [&] {
while (true) {
const u16 imm8 = RandInt<u16>(0, 0xFF);
if (Common::Bits<0, 3>(imm8) == 0b0000 || Common::Bits<4, 7>(imm8) == 0b1111 || (Common::Bits<4, 7>(imm8) == 0b1110 && Common::BitCount(Common::Bits<0, 3>(imm8)) != 1)) {
continue;
}
instructions.push_back(0b1011111100000000 | imm8);
return A32::ITState{static_cast<u8>(imm8)};
}
}();
for (size_t i = 0; i < post_instructions; i++) {
const std::vector<u16> inst = GenRandomThumbInst(instructions.size() * 2, i == post_instructions - 1, it_state);
instructions.insert(instructions.end(), inst.begin(), inst.end());
it_state = it_state.Advance();
}
const u32 start_address = 100;
const u32 cpsr = (RandInt<u32>(0, 0xF) << 28) | 0x1F0;
const u32 fpcr = RandomFpcr();
regs[15] = start_address;
RunTestInstance(jit, uni, jit_env, uni_env, regs, ext_reg, instructions, cpsr, fpcr, pre_instructions + 1 + post_instructions);
}
}
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