409 lines
15 KiB
C++
409 lines
15 KiB
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2022 MerryMage
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* SPDX-License-Identifier: 0BSD
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*/
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#include <algorithm>
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#include <array>
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#include <cstdio>
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#include <functional>
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#include <tuple>
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#include <vector>
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#include <mcl/bit/swap.hpp>
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#include <mcl/stdint.hpp>
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#include "./A32/testenv.h"
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#include "./fuzz_util.h"
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#include "./rand_int.h"
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#include "dynarmic/common/fp/fpcr.h"
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#include "dynarmic/common/fp/fpsr.h"
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#include "dynarmic/frontend/A32/ITState.h"
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#include "dynarmic/frontend/A32/a32_location_descriptor.h"
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#include "dynarmic/frontend/A32/a32_types.h"
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#include "dynarmic/frontend/A32/translate/a32_translate.h"
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#include "dynarmic/interface/A32/a32.h"
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#include "dynarmic/ir/basic_block.h"
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#include "dynarmic/ir/location_descriptor.h"
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#include "dynarmic/ir/opcodes.h"
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// Must be declared last for all necessary operator<< to be declared prior to this.
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#include <fmt/format.h>
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#include <fmt/ostream.h>
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constexpr bool mask_fpsr_cum_bits = true;
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namespace {
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using namespace Dynarmic;
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bool ShouldTestInst(u32 instruction, u32 pc, bool is_thumb, bool is_last_inst, A32::ITState it_state = {}) {
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const A32::LocationDescriptor location = A32::LocationDescriptor{pc, {}, {}}.SetTFlag(is_thumb).SetIT(it_state);
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IR::Block block{location};
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const bool should_continue = A32::TranslateSingleInstruction(block, location, instruction);
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if (!should_continue && !is_last_inst) {
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return false;
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}
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if (auto terminal = block.GetTerminal(); boost::get<IR::Term::Interpret>(&terminal)) {
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return false;
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}
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for (const auto& ir_inst : block) {
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switch (ir_inst.GetOpcode()) {
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case IR::Opcode::A32GetFpscr:
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case IR::Opcode::A32ExceptionRaised:
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case IR::Opcode::A32CallSupervisor:
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case IR::Opcode::A32CoprocInternalOperation:
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case IR::Opcode::A32CoprocSendOneWord:
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case IR::Opcode::A32CoprocSendTwoWords:
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case IR::Opcode::A32CoprocGetOneWord:
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case IR::Opcode::A32CoprocGetTwoWords:
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case IR::Opcode::A32CoprocLoadWords:
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case IR::Opcode::A32CoprocStoreWords:
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// Half-precision
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case IR::Opcode::FPVectorAbs16:
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case IR::Opcode::FPVectorEqual16:
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case IR::Opcode::FPVectorMulAdd16:
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case IR::Opcode::FPVectorNeg16:
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case IR::Opcode::FPVectorRecipEstimate16:
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case IR::Opcode::FPVectorRecipStepFused16:
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case IR::Opcode::FPVectorRoundInt16:
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case IR::Opcode::FPVectorRSqrtEstimate16:
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case IR::Opcode::FPVectorRSqrtStepFused16:
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case IR::Opcode::FPVectorToSignedFixed16:
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case IR::Opcode::FPVectorToUnsignedFixed16:
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case IR::Opcode::FPVectorFromHalf32:
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case IR::Opcode::FPVectorToHalf32:
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return false;
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default:
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continue;
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}
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}
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return true;
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}
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u32 GenRandomArmInst(u32 pc, bool is_last_inst) {
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static const struct InstructionGeneratorInfo {
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std::vector<InstructionGenerator> generators;
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std::vector<InstructionGenerator> invalid;
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} instructions = [] {
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const std::vector<std::tuple<std::string, const char*>> list{
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#define INST(fn, name, bitstring) {#fn, bitstring},
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#include "dynarmic/frontend/A32/decoder/arm.inc"
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#include "dynarmic/frontend/A32/decoder/asimd.inc"
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#include "dynarmic/frontend/A32/decoder/vfp.inc"
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#undef INST
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};
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std::vector<InstructionGenerator> generators;
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std::vector<InstructionGenerator> invalid;
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// List of instructions not to test
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static constexpr std::array do_not_test{
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// Translating load/stores
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"arm_LDRBT", "arm_LDRBT", "arm_LDRHT", "arm_LDRHT", "arm_LDRSBT", "arm_LDRSBT", "arm_LDRSHT", "arm_LDRSHT", "arm_LDRT", "arm_LDRT",
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"arm_STRBT", "arm_STRBT", "arm_STRHT", "arm_STRHT", "arm_STRT", "arm_STRT",
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// Exclusive load/stores
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"arm_LDREXB", "arm_LDREXD", "arm_LDREXH", "arm_LDREX", "arm_LDAEXB", "arm_LDAEXD", "arm_LDAEXH", "arm_LDAEX",
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"arm_STREXB", "arm_STREXD", "arm_STREXH", "arm_STREX", "arm_STLEXB", "arm_STLEXD", "arm_STLEXH", "arm_STLEX",
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"arm_SWP", "arm_SWPB",
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// Elevated load/store multiple instructions.
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"arm_LDM_eret", "arm_LDM_usr",
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"arm_STM_usr",
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// Coprocessor
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"arm_CDP", "arm_LDC", "arm_MCR", "arm_MCRR", "arm_MRC", "arm_MRRC", "arm_STC",
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// System
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"arm_CPS", "arm_RFE", "arm_SRS",
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// Undefined
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"arm_UDF",
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// FPSCR is inaccurate
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"vfp_VMRS",
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// Incorrect Unicorn implementations
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"asimd_VRECPS", // Unicorn does not fuse the multiply and subtraction, resulting in being off by 1ULP.
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"asimd_VRSQRTS", // Unicorn does not fuse the multiply and subtraction, resulting in being off by 1ULP.
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"vfp_VCVT_from_fixed", // Unicorn does not do round-to-nearest-even for this instruction correctly.
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};
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for (const auto& [fn, bitstring] : list) {
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if (std::find(do_not_test.begin(), do_not_test.end(), fn) != do_not_test.end()) {
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invalid.emplace_back(InstructionGenerator{bitstring});
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continue;
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}
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generators.emplace_back(InstructionGenerator{bitstring});
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}
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return InstructionGeneratorInfo{generators, invalid};
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}();
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while (true) {
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const size_t index = RandInt<size_t>(0, instructions.generators.size() - 1);
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const u32 inst = instructions.generators[index].Generate();
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if ((instructions.generators[index].Mask() & 0xF0000000) == 0 && (inst & 0xF0000000) == 0xF0000000) {
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continue;
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}
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if (ShouldTestInst(inst, pc, false, is_last_inst)) {
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return inst;
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}
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}
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}
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std::vector<u16> GenRandomThumbInst(u32 pc, bool is_last_inst, A32::ITState it_state = {}) {
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static const struct InstructionGeneratorInfo {
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std::vector<InstructionGenerator> generators;
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std::vector<InstructionGenerator> invalid;
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} instructions = [] {
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const std::vector<std::tuple<std::string, const char*>> list{
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#define INST(fn, name, bitstring) {#fn, bitstring},
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#include "dynarmic/frontend/A32/decoder/thumb16.inc"
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#include "dynarmic/frontend/A32/decoder/thumb32.inc"
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#undef INST
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};
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const std::vector<std::tuple<std::string, const char*>> vfp_list{
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#define INST(fn, name, bitstring) {#fn, bitstring},
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#include "dynarmic/frontend/A32/decoder/vfp.inc"
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#undef INST
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};
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const std::vector<std::tuple<std::string, const char*>> asimd_list{
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#define INST(fn, name, bitstring) {#fn, bitstring},
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#include "dynarmic/frontend/A32/decoder/asimd.inc"
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#undef INST
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};
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std::vector<InstructionGenerator> generators;
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std::vector<InstructionGenerator> invalid;
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// List of instructions not to test
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static constexpr std::array do_not_test{
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"thumb16_BKPT",
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"thumb16_IT",
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// Exclusive load/stores
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"thumb32_LDREX",
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"thumb32_LDREXB",
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"thumb32_LDREXD",
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"thumb32_LDREXH",
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"thumb32_STREX",
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"thumb32_STREXB",
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"thumb32_STREXD",
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"thumb32_STREXH",
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// Coprocessor
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"thumb32_CDP",
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"thumb32_LDC",
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"thumb32_MCR",
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"thumb32_MCRR",
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"thumb32_MRC",
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"thumb32_MRRC",
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"thumb32_STC",
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};
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for (const auto& [fn, bitstring] : list) {
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if (std::find(do_not_test.begin(), do_not_test.end(), fn) != do_not_test.end()) {
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invalid.emplace_back(InstructionGenerator{bitstring});
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continue;
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}
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generators.emplace_back(InstructionGenerator{bitstring});
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}
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for (const auto& [fn, bs] : vfp_list) {
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std::string bitstring = bs;
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if (bitstring.substr(0, 4) == "cccc" || bitstring.substr(0, 4) == "----") {
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bitstring.replace(0, 4, "1110");
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}
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if (std::find(do_not_test.begin(), do_not_test.end(), fn) != do_not_test.end()) {
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invalid.emplace_back(InstructionGenerator{bitstring.c_str()});
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continue;
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}
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generators.emplace_back(InstructionGenerator{bitstring.c_str()});
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}
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for (const auto& [fn, bs] : asimd_list) {
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std::string bitstring = bs;
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if (bitstring.substr(0, 7) == "1111001") {
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const char U = bitstring[7];
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bitstring.replace(0, 8, "111-1111");
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bitstring[3] = U;
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} else if (bitstring.substr(0, 8) == "11110100") {
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bitstring.replace(0, 8, "11111001");
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} else {
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ASSERT_FALSE("Unhandled ASIMD instruction: {} {}", fn, bs);
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}
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if (std::find(do_not_test.begin(), do_not_test.end(), fn) != do_not_test.end()) {
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invalid.emplace_back(InstructionGenerator{bitstring.c_str()});
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continue;
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}
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generators.emplace_back(InstructionGenerator{bitstring.c_str()});
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}
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return InstructionGeneratorInfo{generators, invalid};
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}();
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while (true) {
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const size_t index = RandInt<size_t>(0, instructions.generators.size() - 1);
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const u32 inst = instructions.generators[index].Generate();
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const bool is_four_bytes = (inst >> 16) != 0;
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if (ShouldTestInst(is_four_bytes ? mcl::bit::swap_halves_32(inst) : inst, pc, true, is_last_inst, it_state)) {
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if (is_four_bytes)
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return {static_cast<u16>(inst >> 16), static_cast<u16>(inst)};
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return {static_cast<u16>(inst)};
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}
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}
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}
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template<typename TestEnv>
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Dynarmic::A32::UserConfig GetUserConfig(TestEnv& testenv) {
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Dynarmic::A32::UserConfig user_config;
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user_config.optimizations &= ~OptimizationFlag::FastDispatch;
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user_config.callbacks = &testenv;
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return user_config;
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}
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template<typename TestEnv>
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static void RunTestInstance(Dynarmic::A32::Jit& jit,
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TestEnv& jit_env,
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const std::array<u32, 16>& regs,
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const std::array<u32, 64>& vecs,
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const std::vector<typename TestEnv::InstructionType>& instructions,
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const u32 cpsr,
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const u32 fpscr,
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const size_t ticks_left) {
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const u32 initial_pc = regs[15];
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const u32 num_words = initial_pc / sizeof(typename TestEnv::InstructionType);
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const u32 code_mem_size = num_words + static_cast<u32>(instructions.size());
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jit_env.code_mem.resize(code_mem_size);
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std::fill(jit_env.code_mem.begin(), jit_env.code_mem.end(), TestEnv::infinite_loop);
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std::copy(instructions.begin(), instructions.end(), jit_env.code_mem.begin() + num_words);
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jit_env.PadCodeMem();
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jit_env.modified_memory.clear();
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jit_env.interrupts.clear();
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jit.Regs() = regs;
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jit.ExtRegs() = vecs;
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jit.SetFpscr(fpscr);
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jit.SetCpsr(cpsr);
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jit.ClearCache();
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jit_env.ticks_left = ticks_left;
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jit.Run();
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fmt::print("instructions: ");
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for (auto instruction : instructions) {
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if constexpr (sizeof(decltype(instruction)) == 2) {
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fmt::print("{:04x} ", instruction);
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} else {
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fmt::print("{:08x} ", instruction);
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}
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}
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fmt::print("\n");
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fmt::print("initial_regs: ");
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for (u32 i : regs) {
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fmt::print("{:08x} ", i);
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}
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fmt::print("\n");
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fmt::print("initial_vecs: ");
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for (u32 i : vecs) {
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fmt::print("{:08x} ", i);
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}
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fmt::print("\n");
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fmt::print("initial_cpsr: {:08x}\n", cpsr);
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fmt::print("initial_fpcr: {:08x}\n", fpscr);
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fmt::print("final_regs: ");
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for (u32 i : jit.Regs()) {
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fmt::print("{:08x} ", i);
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}
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fmt::print("\n");
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fmt::print("final_vecs: ");
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for (u32 i : jit.ExtRegs()) {
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fmt::print("{:08x} ", i);
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}
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fmt::print("\n");
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fmt::print("final_cpsr: {:08x}\n", jit.Cpsr());
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fmt::print("final_fpsr: {:08x}\n", mask_fpsr_cum_bits ? jit.Fpscr() & 0xffffff00 : jit.Fpscr());
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fmt::print("mod_mem: ");
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for (auto [addr, value] : jit_env.modified_memory) {
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fmt::print("{:08x}:{:02x} ", addr, value);
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}
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fmt::print("\n");
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fmt::print("interrupts:\n");
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for (const auto& i : jit_env.interrupts) {
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std::puts(i.c_str());
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}
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fmt::print("===\n");
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}
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} // Anonymous namespace
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void TestThumb(size_t num_instructions, size_t num_iterations = 100000) {
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ThumbTestEnv jit_env{};
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Dynarmic::A32::Jit jit{GetUserConfig(jit_env)};
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std::array<u32, 16> regs;
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std::array<u32, 64> ext_reg;
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std::vector<u16> instructions;
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for (size_t iteration = 0; iteration < num_iterations; ++iteration) {
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std::generate(regs.begin(), regs.end(), [] { return RandInt<u32>(0, ~u32(0)); });
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std::generate(ext_reg.begin(), ext_reg.end(), [] { return RandInt<u32>(0, ~u32(0)); });
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const u32 start_address = 100;
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const u32 cpsr = (RandInt<u32>(0, 0xF) << 28) | 0x1F0;
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const u32 fpcr = RandomFpcr();
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instructions.clear();
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for (size_t i = 0; i < num_instructions; ++i) {
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const auto inst = GenRandomThumbInst(static_cast<u32>(start_address + 2 * instructions.size()), i == num_instructions - 1);
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instructions.insert(instructions.end(), inst.begin(), inst.end());
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}
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regs[15] = start_address;
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RunTestInstance(jit, jit_env, regs, ext_reg, instructions, cpsr, fpcr, num_instructions);
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}
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}
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void TestArm(size_t num_instructions, size_t num_iterations = 100000) {
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ArmTestEnv jit_env{};
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Dynarmic::A32::Jit jit{GetUserConfig(jit_env)};
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std::array<u32, 16> regs;
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std::array<u32, 64> ext_reg;
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std::vector<u32> instructions;
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for (size_t iteration = 0; iteration < num_iterations; ++iteration) {
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std::generate(regs.begin(), regs.end(), [] { return RandInt<u32>(0, ~u32(0)); });
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std::generate(ext_reg.begin(), ext_reg.end(), [] { return RandInt<u32>(0, ~u32(0)); });
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const u32 start_address = 100;
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const u32 cpsr = (RandInt<u32>(0, 0xF) << 28);
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const u32 fpcr = RandomFpcr();
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instructions.clear();
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for (size_t i = 0; i < num_instructions; ++i) {
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instructions.emplace_back(GenRandomArmInst(static_cast<u32>(start_address + 4 * instructions.size()), i == num_instructions - 1));
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}
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regs[15] = start_address;
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RunTestInstance(jit, jit_env, regs, ext_reg, instructions, cpsr, fpcr, 1);
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}
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}
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int main(int, char*[]) {
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detail::g_rand_int_generator.seed(42069);
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TestThumb(1);
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TestArm(1);
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TestThumb(5);
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TestArm(5);
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TestThumb(1024, 1000);
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TestArm(1024, 1000);
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return 0;
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}
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