457296850e
Proper handling of nans for VMX max/min on x64 (minps/maxps has special behavior depending on the operand order that vmx does not have for vminfp/vmaxfp) Add extremely unintrusive guest code profiler utilizing KUSER_SHARED systemtime. This profiler is disabled on platforms other than windows, and on windows is disabled by default by a cvar Repurpose GUEST_SCRATCH64 stack offset to instead be for storing guest function profile times, define GUEST_SCRATCH as 0 instead, since thats already meant to be a scratch area Fix xenia silently closing on config errors/other fatal errors by setting has_console_attached_'s default to false Add alternative code path for guest clock that uses kusershared systemtime instead of QueryPerformanceCounter. This is way faster and I have tested it and found it to be working, but i have disabled it because i do not know how well it works on wine or on processors other than mine Significantly reduce log spam by setting XELOGAPU and XELOGGPU to be LogLevel::Debug Changed some LOGI to LOGD in places to reduce log spam Mark VdSwap as kHighFrequency, it was spamming up logs Make logging calls less intrusive for the caller by forcing the test of log level inline and moving the format/AppendLogLine stuff to an outlined cold function Add swcache namespace for software cache operations like prefetches, streaming stores and streaming loads. Add XE_MSVC_REORDER_BARRIER for preventing msvc from propagating a value too close to its store or from its load Add xe_unlikely_mutex for locks we know have very little contention add XE_HOST_CACHE_LINE_SIZE and XE_RESTRICT to platform.h Microoptimization: Changed most uses of size_t to ring_size_t in RingBuffer, this reduces the size of the inlined ringbuffer operations slightly by eliminating rex prefixes, depending on register allocation Add BeginPrefetchedRead to ringbuffer, which prefetches the second range if there is one according to the provided PrefetchTag added inline_loadclock cvar, which will directly use the value of the guest clock from clock.cc in jitted guest code. off by default change uses of GUEST_SCRATCH64 to GUEST_SCRATCH Add fast vectorized xenos_half_to_float/xenos_float_to_half (currently resides in x64_seq_vector, move to gpu code maybe at some point) Add fast x64 codegen for PackFloat16_4/UnpackFloat16_4. Same code can be used for Float16_2 in future commit. This should speed up some games that use these functions heavily Remove cvar for toggling old float16 behavior Add VRSAVE register, support mfspr/mtspr vrsave Add cvar for toggling off codegen for trap instructions and set it to true by default. Add specialized methods to CommandProcessor: WriteRegistersFromMem, WriteRegisterRangeFromRing, and WriteOneRegisterFromRing. These reduce the overall cost of WriteRegister Use a fixed size vmem vector for upload ranges, realloc/memsetting on resize in the inner loop of requestranges was showing up on the profiler (the search in requestranges itself needs work) Rename fixed_vmem_vector to better fit xenia's naming convention Only log unknown register writes in WriteRegister if DEBUG :/. We're stuck on MSVC with c++17 so we have no way of influencing the branch ordering for that function without profile guided optimization Remove binding stride assert in shader_translator.cc, triangle told me its leftover ogl stuff Mark xe::FatalError as noreturn If a controller is not connected, delay by 1.1 seconds before checking if it has been reconnected. Asking Xinput about a controller slot that is unused is extremely slow, and XinputGetState/SetState were taking up an enormous amount of time in profiles. this may have caused a bit of input lag Protect accesses to input_system with a lock Add proper handling for user_index>= 4 in XamInputGetState/SetState, properly return zeroed state in GetState Add missing argument to NtQueryVirtualMemory_entry Fixed RtlCompareMemoryUlong_entry, it actually does not care if the source is misaligned, and for length it aligns down Fixed RtlUpperChar and RtlLowerChar, added a table that has their correct return values precomputed
1552 lines
51 KiB
C++
1552 lines
51 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2022 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include "xenia/cpu/backend/x64/x64_emitter.h"
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#include <stddef.h>
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#include <climits>
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#include <cstring>
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#include "third_party/fmt/include/fmt/format.h"
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#include "xenia/base/assert.h"
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#include "xenia/base/atomic.h"
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#include "xenia/base/debugging.h"
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#include "xenia/base/literals.h"
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#include "xenia/base/logging.h"
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#include "xenia/base/math.h"
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#include "xenia/base/memory.h"
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#include "xenia/base/profiling.h"
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#include "xenia/base/vec128.h"
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#include "xenia/cpu/backend/x64/x64_backend.h"
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#include "xenia/cpu/backend/x64/x64_code_cache.h"
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#include "xenia/cpu/backend/x64/x64_function.h"
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#include "xenia/cpu/backend/x64/x64_sequences.h"
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#include "xenia/cpu/backend/x64/x64_stack_layout.h"
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#include "xenia/cpu/cpu_flags.h"
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#include "xenia/cpu/function.h"
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#include "xenia/cpu/function_debug_info.h"
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#include "xenia/cpu/hir/instr.h"
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#include "xenia/cpu/hir/opcodes.h"
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#include "xenia/cpu/hir/value.h"
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#include "xenia/cpu/processor.h"
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#include "xenia/cpu/symbol.h"
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#include "xenia/cpu/thread_state.h"
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DEFINE_bool(debugprint_trap_log, false,
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"Log debugprint traps to the active debugger", "CPU");
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DEFINE_bool(ignore_undefined_externs, true,
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"Don't exit when an undefined extern is called.", "CPU");
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DEFINE_bool(emit_source_annotations, false,
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"Add extra movs and nops to make disassembly easier to read.",
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"CPU");
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DEFINE_bool(resolve_rel32_guest_calls, true,
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"Experimental optimization, directly call already resolved "
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"functions via x86 rel32 call/jmp",
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"CPU");
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DEFINE_bool(enable_incorrect_roundingmode_behavior, false,
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"Disables the FPU/VMX MXCSR sharing workaround, potentially "
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"causing incorrect rounding behavior and denormal handling in VMX "
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"code. The workaround may cause reduced CPU performance but is a "
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"more accurate emulation",
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"x64");
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#if XE_X64_PROFILER_AVAILABLE == 1
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DEFINE_bool(instrument_call_times, false,
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"Compute time taken for functions, for profiling guest code",
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"x64");
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#endif
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namespace xe {
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namespace cpu {
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namespace backend {
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namespace x64 {
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using xe::cpu::hir::HIRBuilder;
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using xe::cpu::hir::Instr;
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using namespace xe::literals;
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static const size_t kMaxCodeSize = 1_MiB;
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static const size_t kStashOffset = 32;
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// static const size_t kStashOffsetHigh = 32 + 32;
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const uint32_t X64Emitter::gpr_reg_map_[X64Emitter::GPR_COUNT] = {
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Xbyak::Operand::RBX, Xbyak::Operand::R10, Xbyak::Operand::R11,
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Xbyak::Operand::R12, Xbyak::Operand::R13, Xbyak::Operand::R14,
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Xbyak::Operand::R15,
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};
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const uint32_t X64Emitter::xmm_reg_map_[X64Emitter::XMM_COUNT] = {
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4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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};
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X64Emitter::X64Emitter(X64Backend* backend, XbyakAllocator* allocator)
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: CodeGenerator(kMaxCodeSize, Xbyak::AutoGrow, allocator),
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processor_(backend->processor()),
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backend_(backend),
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code_cache_(backend->code_cache()),
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allocator_(allocator) {
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if (!cpu_.has(Xbyak::util::Cpu::tAVX)) {
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xe::FatalError(
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"Your CPU does not support AVX, which is required by Xenia. See the "
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"FAQ for system requirements at https://xenia.jp");
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return;
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}
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#define TEST_EMIT_FEATURE(emit, ext) \
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if ((cvars::x64_extension_mask & emit) == emit) { \
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feature_flags_ |= (cpu_.has(ext) ? emit : 0); \
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}
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TEST_EMIT_FEATURE(kX64EmitAVX2, Xbyak::util::Cpu::tAVX2);
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TEST_EMIT_FEATURE(kX64EmitFMA, Xbyak::util::Cpu::tFMA);
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TEST_EMIT_FEATURE(kX64EmitLZCNT, Xbyak::util::Cpu::tLZCNT);
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TEST_EMIT_FEATURE(kX64EmitBMI1, Xbyak::util::Cpu::tBMI1);
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TEST_EMIT_FEATURE(kX64EmitBMI2, Xbyak::util::Cpu::tBMI2);
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TEST_EMIT_FEATURE(kX64EmitF16C, Xbyak::util::Cpu::tF16C);
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TEST_EMIT_FEATURE(kX64EmitMovbe, Xbyak::util::Cpu::tMOVBE);
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TEST_EMIT_FEATURE(kX64EmitGFNI, Xbyak::util::Cpu::tGFNI);
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TEST_EMIT_FEATURE(kX64EmitAVX512F, Xbyak::util::Cpu::tAVX512F);
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TEST_EMIT_FEATURE(kX64EmitAVX512VL, Xbyak::util::Cpu::tAVX512VL);
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TEST_EMIT_FEATURE(kX64EmitAVX512BW, Xbyak::util::Cpu::tAVX512BW);
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TEST_EMIT_FEATURE(kX64EmitAVX512DQ, Xbyak::util::Cpu::tAVX512DQ);
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TEST_EMIT_FEATURE(kX64EmitAVX512VBMI, Xbyak::util::Cpu::tAVX512VBMI);
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TEST_EMIT_FEATURE(kX64EmitPrefetchW, Xbyak::util::Cpu::tPREFETCHW);
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#undef TEST_EMIT_FEATURE
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/*
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fix for xbyak bug/omission, amd cpus are never checked for lzcnt. fixed in
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latest version of xbyak
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*/
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unsigned int data[4];
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Xbyak::util::Cpu::getCpuid(0x80000001, data);
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unsigned amd_flags = data[2];
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if (amd_flags & (1U << 5)) {
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if ((cvars::x64_extension_mask & kX64EmitLZCNT) == kX64EmitLZCNT) {
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feature_flags_ |= kX64EmitLZCNT;
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}
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}
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// todo: although not reported by cpuid, zen 1 and zen+ also have fma4
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if (amd_flags & (1U << 16)) {
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if ((cvars::x64_extension_mask & kX64EmitFMA4) == kX64EmitFMA4) {
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feature_flags_ |= kX64EmitFMA4;
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}
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}
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if (amd_flags & (1U << 21)) {
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if ((cvars::x64_extension_mask & kX64EmitTBM) == kX64EmitTBM) {
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feature_flags_ |= kX64EmitTBM;
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}
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}
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if (cpu_.has(Xbyak::util::Cpu::tAMD)) {
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bool is_zennish = cpu_.displayFamily >= 0x17;
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/*
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chrispy: according to agner's tables, all amd architectures that
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we support (ones with avx) have the same timings for
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jrcxz/loop/loope/loopne as for other jmps
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*/
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feature_flags_ |= kX64FastJrcx;
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feature_flags_ |= kX64FastLoop;
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if (is_zennish) {
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// ik that i heard somewhere that this is the case for zen, but i need to
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// verify. cant find my original source for that.
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// todo: ask agner?
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feature_flags_ |= kX64FlagsIndependentVars;
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}
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}
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may_use_membase32_as_zero_reg_ =
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static_cast<uint32_t>(reinterpret_cast<uintptr_t>(
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processor()->memory()->virtual_membase())) == 0;
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}
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X64Emitter::~X64Emitter() = default;
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bool X64Emitter::Emit(GuestFunction* function, HIRBuilder* builder,
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uint32_t debug_info_flags, FunctionDebugInfo* debug_info,
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void** out_code_address, size_t* out_code_size,
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std::vector<SourceMapEntry>* out_source_map) {
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SCOPE_profile_cpu_f("cpu");
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guest_module_ = dynamic_cast<XexModule*>(function->module());
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current_guest_function_ = function->address();
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// Reset.
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debug_info_ = debug_info;
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debug_info_flags_ = debug_info_flags;
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trace_data_ = &function->trace_data();
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source_map_arena_.Reset();
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// Fill the generator with code.
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EmitFunctionInfo func_info = {};
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if (!Emit(builder, func_info)) {
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return false;
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}
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// Copy the final code to the cache and relocate it.
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*out_code_size = getSize();
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*out_code_address = Emplace(func_info, function);
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// Stash source map.
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source_map_arena_.CloneContents(out_source_map);
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return true;
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}
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void* X64Emitter::Emplace(const EmitFunctionInfo& func_info,
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GuestFunction* function) {
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// To avoid changing xbyak, we do a switcharoo here.
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// top_ points to the Xbyak buffer, and since we are in AutoGrow mode
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// it has pending relocations. We copy the top_ to our buffer, swap the
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// pointer, relocate, then return the original scratch pointer for use.
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// top_ is used by Xbyak's ready() as both write base pointer and the absolute
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// address base, which would not work on platforms not supporting writable
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// executable memory, but Xenia doesn't use absolute label addresses in the
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// generated code.
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uint8_t* old_address = top_;
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void* new_execute_address;
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void* new_write_address;
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assert_true(func_info.code_size.total == size_);
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if (function) {
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code_cache_->PlaceGuestCode(function->address(), top_, func_info, function,
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new_execute_address, new_write_address);
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if (cvars::resolve_rel32_guest_calls) {
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for (auto&& callsite : call_sites_) {
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#pragma pack(push, 1)
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struct RGCEmitted {
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uint8_t ff_;
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uint32_t rgcid_;
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};
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#pragma pack(pop)
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RGCEmitted* hunter = (RGCEmitted*)new_execute_address;
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while (hunter->ff_ != 0xFF || hunter->rgcid_ != callsite.offset_) {
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hunter = reinterpret_cast<RGCEmitted*>(
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reinterpret_cast<char*>(hunter) + 1);
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}
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hunter->ff_ = callsite.is_jump_ ? 0xE9 : 0xE8;
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hunter->rgcid_ =
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static_cast<uint32_t>(static_cast<intptr_t>(callsite.destination_) -
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reinterpret_cast<intptr_t>(hunter + 1));
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}
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}
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} else {
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code_cache_->PlaceHostCode(0, top_, func_info, new_execute_address,
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new_write_address);
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}
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top_ = reinterpret_cast<uint8_t*>(new_write_address);
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ready();
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top_ = old_address;
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reset();
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call_sites_.clear();
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tail_code_.clear();
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for (auto&& cached_label : label_cache_) {
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delete cached_label;
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}
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label_cache_.clear();
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return new_execute_address;
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}
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bool X64Emitter::Emit(HIRBuilder* builder, EmitFunctionInfo& func_info) {
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Xbyak::Label epilog_label;
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epilog_label_ = &epilog_label;
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// Calculate stack size. We need to align things to their natural sizes.
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// This could be much better (sort by type/etc).
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auto locals = builder->locals();
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size_t stack_offset = StackLayout::GUEST_STACK_SIZE;
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for (auto it = locals.begin(); it != locals.end(); ++it) {
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auto slot = *it;
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size_t type_size = GetTypeSize(slot->type);
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// Align to natural size.
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stack_offset = xe::align(stack_offset, type_size);
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slot->set_constant((uint32_t)stack_offset);
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stack_offset += type_size;
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}
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// Ensure 16b alignment.
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stack_offset -= StackLayout::GUEST_STACK_SIZE;
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stack_offset = xe::align(stack_offset, static_cast<size_t>(16));
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struct _code_offsets {
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size_t prolog;
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size_t prolog_stack_alloc;
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size_t body;
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size_t epilog;
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size_t tail;
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} code_offsets = {};
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code_offsets.prolog = getSize();
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// Function prolog.
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// Must be 16b aligned.
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// Windows is very strict about the form of this and the epilog:
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// https://docs.microsoft.com/en-us/cpp/build/prolog-and-epilog?view=vs-2017
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// IMPORTANT: any changes to the prolog must be kept in sync with
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// X64CodeCache, which dynamically generates exception information.
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// Adding or changing anything here must be matched!
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const size_t stack_size = StackLayout::GUEST_STACK_SIZE + stack_offset;
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assert_true((stack_size + 8) % 16 == 0);
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func_info.stack_size = stack_size;
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stack_size_ = stack_size;
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sub(rsp, (uint32_t)stack_size);
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code_offsets.prolog_stack_alloc = getSize();
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code_offsets.body = getSize();
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xor_(eax, eax);
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/*
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* chrispy: removed this, it serves no purpose
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mov(qword[rsp + StackLayout::GUEST_CTX_HOME], GetContextReg());
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*/
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mov(qword[rsp + StackLayout::GUEST_RET_ADDR], rcx);
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mov(qword[rsp + StackLayout::GUEST_CALL_RET_ADDR], rax); // 0
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#if XE_X64_PROFILER_AVAILABLE == 1
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if (cvars::instrument_call_times) {
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mov(rdx, 0x7ffe0014); // load pointer to kusershared systemtime
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mov(rdx, qword[rdx]);
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mov(qword[rsp + StackLayout::GUEST_PROFILER_START],
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rdx); // save time for end of function
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}
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#endif
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// Safe now to do some tracing.
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if (debug_info_flags_ & DebugInfoFlags::kDebugInfoTraceFunctions) {
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// We require 32-bit addresses.
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assert_true(uint64_t(trace_data_->header()) < UINT_MAX);
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auto trace_header = trace_data_->header();
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// Call count.
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lock();
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inc(qword[low_address(&trace_header->function_call_count)]);
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// Get call history slot.
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static_assert(FunctionTraceData::kFunctionCallerHistoryCount == 4,
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"bitmask depends on count");
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mov(rax, qword[low_address(&trace_header->function_call_count)]);
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and_(rax, 0b00000011);
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// Record call history value into slot (guest addr in RDX).
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mov(dword[Xbyak::RegExp(uint32_t(uint64_t(
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low_address(&trace_header->function_caller_history)))) +
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rax * 4],
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edx);
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// Calling thread. Load ax with thread ID.
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EmitGetCurrentThreadId();
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lock();
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bts(qword[low_address(&trace_header->function_thread_use)], rax);
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}
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// Load membase.
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/*
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* chrispy: removed this, as long as we load it in HostToGuestThunk we can
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count on no other code modifying it. mov(GetMembaseReg(),
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qword[GetContextReg() + offsetof(ppc::PPCContext, virtual_membase)]);
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*/
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// Body.
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auto block = builder->first_block();
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while (block) {
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ForgetMxcsrMode(); // at start of block, mxcsr mode is undefined
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// Mark block labels.
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auto label = block->label_head;
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while (label) {
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L(label->name);
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label = label->next;
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}
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// Process instructions.
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const Instr* instr = block->instr_head;
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while (instr) {
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const Instr* new_tail = instr;
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if (!SelectSequence(this, instr, &new_tail)) {
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// No sequence found!
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// NOTE: If you encounter this after adding a new instruction, do a full
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// rebuild!
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assert_always();
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XELOGE("Unable to process HIR opcode {}", GetOpcodeName(instr->opcode));
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break;
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}
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instr = new_tail;
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}
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block = block->next;
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}
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// Function epilog.
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L(epilog_label);
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epilog_label_ = nullptr;
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EmitTraceUserCallReturn();
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/*
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* chrispy: removed this, it serves no purpose
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mov(GetContextReg(), qword[rsp + StackLayout::GUEST_CTX_HOME]);
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*/
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code_offsets.epilog = getSize();
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EmitProfilerEpilogue();
|
|
|
|
add(rsp, (uint32_t)stack_size);
|
|
ret();
|
|
// todo: do some kind of sorting by alignment?
|
|
for (auto&& tail_item : tail_code_) {
|
|
if (tail_item.alignment) {
|
|
align(tail_item.alignment);
|
|
}
|
|
tail_item.func(*this, tail_item.label);
|
|
}
|
|
|
|
code_offsets.tail = getSize();
|
|
|
|
if (cvars::emit_source_annotations) {
|
|
nop(5);
|
|
}
|
|
|
|
assert_zero(code_offsets.prolog);
|
|
func_info.code_size.total = getSize();
|
|
func_info.code_size.prolog = code_offsets.body - code_offsets.prolog;
|
|
func_info.code_size.body = code_offsets.epilog - code_offsets.body;
|
|
func_info.code_size.epilog = code_offsets.tail - code_offsets.epilog;
|
|
func_info.code_size.tail = getSize() - code_offsets.tail;
|
|
func_info.prolog_stack_alloc_offset =
|
|
code_offsets.prolog_stack_alloc - code_offsets.prolog;
|
|
|
|
return true;
|
|
}
|
|
// dont use rax, we do this in tail call handling
|
|
void X64Emitter::EmitProfilerEpilogue() {
|
|
#if XE_X64_PROFILER_AVAILABLE == 1
|
|
if (cvars::instrument_call_times) {
|
|
uint64_t* profiler_entry =
|
|
backend()->GetProfilerRecordForFunction(current_guest_function_);
|
|
mov(ecx, 0x7ffe0014);
|
|
mov(rdx, qword[rcx]);
|
|
mov(rbx, (uintptr_t)profiler_entry);
|
|
sub(rdx, qword[rsp + StackLayout::GUEST_PROFILER_START]);
|
|
|
|
// atomic add our time to the profiler entry
|
|
// this could be atomic free if we had per thread profile counts, and on a
|
|
// threads exit we lock and sum up to the global counts, which would make
|
|
// this a few cycles less intrusive, but its good enough for now
|
|
// actually... lets just try without atomics lol
|
|
// lock();
|
|
add(qword[rbx], rdx);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void X64Emitter::MarkSourceOffset(const Instr* i) {
|
|
auto entry = source_map_arena_.Alloc<SourceMapEntry>();
|
|
entry->guest_address = static_cast<uint32_t>(i->src1.offset);
|
|
entry->hir_offset = uint32_t(i->block->ordinal << 16) | i->ordinal;
|
|
entry->code_offset = static_cast<uint32_t>(getSize());
|
|
|
|
if (cvars::emit_source_annotations) {
|
|
nop(2);
|
|
mov(eax, entry->guest_address);
|
|
nop(2);
|
|
}
|
|
|
|
if (debug_info_flags_ & DebugInfoFlags::kDebugInfoTraceFunctionCoverage) {
|
|
uint32_t instruction_index =
|
|
(entry->guest_address - trace_data_->start_address()) / 4;
|
|
lock();
|
|
inc(qword[low_address(trace_data_->instruction_execute_counts() +
|
|
instruction_index * 8)]);
|
|
}
|
|
}
|
|
|
|
void X64Emitter::EmitGetCurrentThreadId() {
|
|
// rsi must point to context. We could fetch from the stack if needed.
|
|
mov(ax, word[GetContextReg() + offsetof(ppc::PPCContext, thread_id)]);
|
|
}
|
|
|
|
void X64Emitter::EmitTraceUserCallReturn() {}
|
|
|
|
void X64Emitter::DebugBreak() {
|
|
// TODO(benvanik): notify debugger.
|
|
db(0xCC);
|
|
}
|
|
|
|
uint64_t TrapDebugPrint(void* raw_context, uint64_t address) {
|
|
auto thread_state =
|
|
reinterpret_cast<ppc::PPCContext_s*>(raw_context)->thread_state;
|
|
uint32_t str_ptr = uint32_t(thread_state->context()->r[3]);
|
|
// uint16_t str_len = uint16_t(thread_state->context()->r[4]);
|
|
auto str = thread_state->memory()->TranslateVirtual<const char*>(str_ptr);
|
|
// TODO(benvanik): truncate to length?
|
|
XELOGD("(DebugPrint) {}", str);
|
|
|
|
if (cvars::debugprint_trap_log) {
|
|
debugging::DebugPrint("(DebugPrint) {}", str);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
uint64_t TrapDebugBreak(void* raw_context, uint64_t address) {
|
|
auto thread_state =
|
|
reinterpret_cast<ppc::PPCContext_s*>(raw_context)->thread_state;
|
|
XELOGE("tw/td forced trap hit! This should be a crash!");
|
|
if (cvars::break_on_debugbreak) {
|
|
xe::debugging::Break();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void X64Emitter::Trap(uint16_t trap_type) {
|
|
switch (trap_type) {
|
|
case 20:
|
|
case 26:
|
|
// 0x0FE00014 is a 'debug print' where r3 = buffer r4 = length
|
|
CallNative(TrapDebugPrint, 0);
|
|
break;
|
|
case 0:
|
|
case 22:
|
|
// Always trap?
|
|
// TODO(benvanik): post software interrupt to debugger.
|
|
CallNative(TrapDebugBreak, 0);
|
|
break;
|
|
case 25:
|
|
// ?
|
|
break;
|
|
default:
|
|
XELOGW("Unknown trap type {}", trap_type);
|
|
db(0xCC);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void X64Emitter::UnimplementedInstr(const hir::Instr* i) {
|
|
// TODO(benvanik): notify debugger.
|
|
db(0xCC);
|
|
assert_always();
|
|
}
|
|
|
|
// This is used by the X64ThunkEmitter's ResolveFunctionThunk.
|
|
uint64_t ResolveFunction(void* raw_context, uint64_t target_address) {
|
|
auto thread_state =
|
|
reinterpret_cast<ppc::PPCContext_s*>(raw_context)->thread_state;
|
|
|
|
// TODO(benvanik): required?
|
|
assert_not_zero(target_address);
|
|
|
|
auto fn = thread_state->processor()->ResolveFunction(
|
|
static_cast<uint32_t>(target_address));
|
|
assert_not_null(fn);
|
|
auto x64_fn = static_cast<X64Function*>(fn);
|
|
uint64_t addr = reinterpret_cast<uint64_t>(x64_fn->machine_code());
|
|
|
|
return addr;
|
|
}
|
|
|
|
void X64Emitter::Call(const hir::Instr* instr, GuestFunction* function) {
|
|
assert_not_null(function);
|
|
ForgetMxcsrMode();
|
|
auto fn = static_cast<X64Function*>(function);
|
|
// Resolve address to the function to call and store in rax.
|
|
|
|
if (cvars::resolve_rel32_guest_calls && fn->machine_code()) {
|
|
ResolvableGuestCall rgc;
|
|
rgc.destination_ = uint32_t(uint64_t(fn->machine_code()));
|
|
rgc.offset_ = current_rgc_id_;
|
|
current_rgc_id_++;
|
|
|
|
if (!(instr->flags & hir::CALL_TAIL)) {
|
|
mov(rcx, qword[rsp + StackLayout::GUEST_CALL_RET_ADDR]);
|
|
|
|
db(0xFF);
|
|
rgc.is_jump_ = false;
|
|
|
|
dd(rgc.offset_);
|
|
|
|
} else {
|
|
// tail call
|
|
EmitTraceUserCallReturn();
|
|
|
|
rgc.is_jump_ = true;
|
|
// Pass the callers return address over.
|
|
mov(rcx, qword[rsp + StackLayout::GUEST_RET_ADDR]);
|
|
|
|
add(rsp, static_cast<uint32_t>(stack_size()));
|
|
db(0xFF);
|
|
dd(rgc.offset_);
|
|
}
|
|
call_sites_.push_back(rgc);
|
|
return;
|
|
}
|
|
|
|
if (fn->machine_code()) {
|
|
// TODO(benvanik): is it worth it to do this? It removes the need for
|
|
// a ResolveFunction call, but makes the table less useful.
|
|
assert_zero(uint64_t(fn->machine_code()) & 0xFFFFFFFF00000000);
|
|
// todo: this should be changed so that we can actually do a call to
|
|
// fn->machine_code. the code will be emitted near us, so 32 bit rel jmp
|
|
// should be possible
|
|
mov(eax, uint32_t(uint64_t(fn->machine_code())));
|
|
} else if (code_cache_->has_indirection_table()) {
|
|
// Load the pointer to the indirection table maintained in X64CodeCache.
|
|
// The target dword will either contain the address of the generated code
|
|
// or a thunk to ResolveAddress.
|
|
mov(ebx, function->address());
|
|
mov(eax, dword[ebx]);
|
|
} else {
|
|
// Old-style resolve.
|
|
// Not too important because indirection table is almost always available.
|
|
// TODO: Overwrite the call-site with a straight call.
|
|
CallNative(&ResolveFunction, function->address());
|
|
}
|
|
|
|
// Actually jump/call to rax.
|
|
if (instr->flags & hir::CALL_TAIL) {
|
|
// Since we skip the prolog we need to mark the return here.
|
|
EmitTraceUserCallReturn();
|
|
EmitProfilerEpilogue();
|
|
// Pass the callers return address over.
|
|
mov(rcx, qword[rsp + StackLayout::GUEST_RET_ADDR]);
|
|
|
|
add(rsp, static_cast<uint32_t>(stack_size()));
|
|
jmp(rax);
|
|
} else {
|
|
// Return address is from the previous SET_RETURN_ADDRESS.
|
|
mov(rcx, qword[rsp + StackLayout::GUEST_CALL_RET_ADDR]);
|
|
|
|
call(rax);
|
|
}
|
|
}
|
|
|
|
void X64Emitter::CallIndirect(const hir::Instr* instr,
|
|
const Xbyak::Reg64& reg) {
|
|
ForgetMxcsrMode();
|
|
// Check if return.
|
|
if (instr->flags & hir::CALL_POSSIBLE_RETURN) {
|
|
cmp(reg.cvt32(), dword[rsp + StackLayout::GUEST_RET_ADDR]);
|
|
je(epilog_label(), CodeGenerator::T_NEAR);
|
|
}
|
|
|
|
// Load the pointer to the indirection table maintained in X64CodeCache.
|
|
// The target dword will either contain the address of the generated code
|
|
// or a thunk to ResolveAddress.
|
|
if (code_cache_->has_indirection_table()) {
|
|
if (reg.cvt32() != ebx) {
|
|
mov(ebx, reg.cvt32());
|
|
}
|
|
mov(eax, dword[ebx]);
|
|
} else {
|
|
// Old-style resolve.
|
|
// Not too important because indirection table is almost always available.
|
|
mov(edx, reg.cvt32());
|
|
mov(rax, reinterpret_cast<uint64_t>(ResolveFunction));
|
|
mov(rcx, GetContextReg());
|
|
call(rax);
|
|
}
|
|
|
|
// Actually jump/call to rax.
|
|
if (instr->flags & hir::CALL_TAIL) {
|
|
// Since we skip the prolog we need to mark the return here.
|
|
EmitTraceUserCallReturn();
|
|
EmitProfilerEpilogue();
|
|
// Pass the callers return address over.
|
|
mov(rcx, qword[rsp + StackLayout::GUEST_RET_ADDR]);
|
|
|
|
add(rsp, static_cast<uint32_t>(stack_size()));
|
|
jmp(rax);
|
|
} else {
|
|
// Return address is from the previous SET_RETURN_ADDRESS.
|
|
mov(rcx, qword[rsp + StackLayout::GUEST_CALL_RET_ADDR]);
|
|
|
|
call(rax);
|
|
}
|
|
}
|
|
|
|
uint64_t UndefinedCallExtern(void* raw_context, uint64_t function_ptr) {
|
|
auto function = reinterpret_cast<Function*>(function_ptr);
|
|
if (!cvars::ignore_undefined_externs) {
|
|
xe::FatalError(fmt::format("undefined extern call to {:08X} {}",
|
|
function->address(), function->name().c_str()));
|
|
} else {
|
|
XELOGE("undefined extern call to {:08X} {}", function->address(),
|
|
function->name());
|
|
}
|
|
return 0;
|
|
}
|
|
void X64Emitter::CallExtern(const hir::Instr* instr, const Function* function) {
|
|
ForgetMxcsrMode();
|
|
bool undefined = true;
|
|
if (function->behavior() == Function::Behavior::kBuiltin) {
|
|
auto builtin_function = static_cast<const BuiltinFunction*>(function);
|
|
if (builtin_function->handler()) {
|
|
undefined = false;
|
|
// rcx = target function
|
|
// rdx = arg0
|
|
// r8 = arg1
|
|
// r9 = arg2
|
|
mov(rcx, reinterpret_cast<uint64_t>(builtin_function->handler()));
|
|
mov(rdx, reinterpret_cast<uint64_t>(builtin_function->arg0()));
|
|
mov(r8, reinterpret_cast<uint64_t>(builtin_function->arg1()));
|
|
call(backend()->guest_to_host_thunk());
|
|
// rax = host return
|
|
}
|
|
} else if (function->behavior() == Function::Behavior::kExtern) {
|
|
auto extern_function = static_cast<const GuestFunction*>(function);
|
|
if (extern_function->extern_handler()) {
|
|
undefined = false;
|
|
// rcx = target function
|
|
// rdx = arg0
|
|
// r8 = arg1
|
|
// r9 = arg2
|
|
mov(rcx, reinterpret_cast<uint64_t>(extern_function->extern_handler()));
|
|
mov(rdx,
|
|
qword[GetContextReg() + offsetof(ppc::PPCContext, kernel_state)]);
|
|
call(backend()->guest_to_host_thunk());
|
|
// rax = host return
|
|
}
|
|
}
|
|
if (undefined) {
|
|
CallNative(UndefinedCallExtern, reinterpret_cast<uint64_t>(function));
|
|
}
|
|
}
|
|
|
|
void X64Emitter::CallNative(void* fn) { CallNativeSafe(fn); }
|
|
|
|
void X64Emitter::CallNative(uint64_t (*fn)(void* raw_context)) {
|
|
CallNativeSafe(reinterpret_cast<void*>(fn));
|
|
}
|
|
|
|
void X64Emitter::CallNative(uint64_t (*fn)(void* raw_context, uint64_t arg0)) {
|
|
CallNativeSafe(reinterpret_cast<void*>(fn));
|
|
}
|
|
|
|
void X64Emitter::CallNative(uint64_t (*fn)(void* raw_context, uint64_t arg0),
|
|
uint64_t arg0) {
|
|
mov(GetNativeParam(0), arg0);
|
|
CallNativeSafe(reinterpret_cast<void*>(fn));
|
|
}
|
|
|
|
void X64Emitter::CallNativeSafe(void* fn) {
|
|
// rcx = target function
|
|
// rdx = arg0
|
|
// r8 = arg1
|
|
// r9 = arg2
|
|
mov(rcx, reinterpret_cast<uint64_t>(fn));
|
|
call(backend()->guest_to_host_thunk());
|
|
// rax = host return
|
|
}
|
|
|
|
void X64Emitter::SetReturnAddress(uint64_t value) {
|
|
mov(rax, value);
|
|
mov(qword[rsp + StackLayout::GUEST_CALL_RET_ADDR], rax);
|
|
}
|
|
|
|
Xbyak::Reg64 X64Emitter::GetNativeParam(uint32_t param) {
|
|
if (param == 0)
|
|
return rdx;
|
|
else if (param == 1)
|
|
return r8;
|
|
else if (param == 2)
|
|
return r9;
|
|
|
|
assert_always();
|
|
return r9;
|
|
}
|
|
|
|
// Important: If you change these, you must update the thunks in x64_backend.cc!
|
|
Xbyak::Reg64 X64Emitter::GetContextReg() const { return rsi; }
|
|
Xbyak::Reg64 X64Emitter::GetMembaseReg() const { return rdi; }
|
|
|
|
void X64Emitter::ReloadMembase() {
|
|
mov(GetMembaseReg(),
|
|
qword[GetContextReg() +
|
|
offsetof(ppc::PPCContext, virtual_membase)]); // membase
|
|
}
|
|
|
|
// Len Assembly Byte Sequence
|
|
// ============================================================================
|
|
// 1b NOP 90H
|
|
// 2b 66 NOP 66 90H
|
|
// 3b NOP DWORD ptr [EAX] 0F 1F 00H
|
|
// 4b NOP DWORD ptr [EAX + 00H] 0F 1F 40 00H
|
|
// 5b NOP DWORD ptr [EAX + EAX*1 + 00H] 0F 1F 44 00 00H
|
|
// 6b 66 NOP DWORD ptr [EAX + EAX*1 + 00H] 66 0F 1F 44 00 00H
|
|
// 7b NOP DWORD ptr [EAX + 00000000H] 0F 1F 80 00 00 00 00H
|
|
// 8b NOP DWORD ptr [EAX + EAX*1 + 00000000H] 0F 1F 84 00 00 00 00 00H
|
|
// 9b 66 NOP DWORD ptr [EAX + EAX*1 + 00000000H] 66 0F 1F 84 00 00 00 00 00H
|
|
void X64Emitter::nop(size_t length) {
|
|
for (size_t i = 0; i < length; ++i) {
|
|
db(0x90);
|
|
}
|
|
}
|
|
|
|
bool X64Emitter::ConstantFitsIn32Reg(uint64_t v) {
|
|
if ((v & ~0x7FFFFFFF) == 0) {
|
|
// Fits under 31 bits, so just load using normal mov.
|
|
return true;
|
|
} else if ((v & ~0x7FFFFFFF) == ~0x7FFFFFFF) {
|
|
// Negative number that fits in 32bits.
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
/*
|
|
WARNING: do not use any regs here, addr is often produced by
|
|
ComputeAddressOffset, which may use rax/rdx/rcx in its addr expression
|
|
*/
|
|
void X64Emitter::MovMem64(const Xbyak::RegExp& addr, uint64_t v) {
|
|
uint32_t lowpart = static_cast<uint32_t>(v);
|
|
uint32_t highpart = static_cast<uint32_t>(v >> 32);
|
|
// check whether the constant coincidentally collides with our membase
|
|
if (v == (uintptr_t)processor()->memory()->virtual_membase()) {
|
|
mov(qword[addr], GetMembaseReg());
|
|
} else if ((v & ~0x7FFFFFFF) == 0) {
|
|
// Fits under 31 bits, so just load using normal mov.
|
|
|
|
mov(qword[addr], v);
|
|
} else if ((v & ~0x7FFFFFFF) == ~0x7FFFFFFF) {
|
|
// Negative number that fits in 32bits.
|
|
mov(qword[addr], v);
|
|
} else if (!highpart) {
|
|
// All high bits are zero. It'd be nice if we had a way to load a 32bit
|
|
// immediate without sign extending!
|
|
// TODO(benvanik): this is super common, find a better way.
|
|
if (lowpart == 0 && CanUseMembaseLow32As0()) {
|
|
mov(dword[addr], GetMembaseReg().cvt32());
|
|
} else {
|
|
mov(dword[addr], static_cast<uint32_t>(v));
|
|
}
|
|
if (CanUseMembaseLow32As0()) {
|
|
mov(dword[addr + 4], GetMembaseReg().cvt32());
|
|
} else {
|
|
mov(dword[addr + 4], 0);
|
|
}
|
|
} else {
|
|
// 64bit number that needs double movs.
|
|
|
|
if (lowpart == 0 && CanUseMembaseLow32As0()) {
|
|
mov(dword[addr], GetMembaseReg().cvt32());
|
|
} else {
|
|
mov(dword[addr], lowpart);
|
|
}
|
|
if (highpart == 0 && CanUseMembaseLow32As0()) {
|
|
mov(dword[addr + 4], GetMembaseReg().cvt32());
|
|
} else {
|
|
mov(dword[addr + 4], highpart);
|
|
}
|
|
}
|
|
}
|
|
static inline vec128_t v128_setr_bytes(unsigned char v0, unsigned char v1,
|
|
unsigned char v2, unsigned char v3,
|
|
unsigned char v4, unsigned char v5,
|
|
unsigned char v6, unsigned char v7,
|
|
unsigned char v8, unsigned char v9,
|
|
unsigned char v10, unsigned char v11,
|
|
unsigned char v12, unsigned char v13,
|
|
unsigned char v14, unsigned char v15) {
|
|
vec128_t result;
|
|
|
|
result.u8[0] = v0;
|
|
result.u8[1] = v1;
|
|
result.u8[2] = v2;
|
|
result.u8[3] = v3;
|
|
result.u8[4] = v4;
|
|
result.u8[5] = v5;
|
|
result.u8[6] = v6;
|
|
result.u8[7] = v7;
|
|
result.u8[8] = v8;
|
|
result.u8[9] = v9;
|
|
result.u8[10] = v10;
|
|
result.u8[11] = v11;
|
|
result.u8[12] = v12;
|
|
result.u8[13] = v13;
|
|
result.u8[14] = v14;
|
|
|
|
result.u8[15] = v15;
|
|
return result;
|
|
}
|
|
|
|
static const vec128_t xmm_consts[] = {
|
|
/* XMMZero */ vec128f(0.0f),
|
|
/* XMMOne */ vec128f(1.0f),
|
|
/* XMMOnePD */ vec128d(1.0),
|
|
/* XMMNegativeOne */ vec128f(-1.0f, -1.0f, -1.0f, -1.0f),
|
|
/* XMMFFFF */
|
|
vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu),
|
|
/* XMMMaskX16Y16 */
|
|
vec128i(0x0000FFFFu, 0xFFFF0000u, 0x00000000u, 0x00000000u),
|
|
/* XMMFlipX16Y16 */
|
|
vec128i(0x00008000u, 0x00000000u, 0x00000000u, 0x00000000u),
|
|
/* XMMFixX16Y16 */ vec128f(-32768.0f, 0.0f, 0.0f, 0.0f),
|
|
/* XMMNormalizeX16Y16 */
|
|
vec128f(1.0f / 32767.0f, 1.0f / (32767.0f * 65536.0f), 0.0f, 0.0f),
|
|
/* XMM0001 */ vec128f(0.0f, 0.0f, 0.0f, 1.0f),
|
|
/* XMM3301 */ vec128f(3.0f, 3.0f, 0.0f, 1.0f),
|
|
/* XMM3331 */ vec128f(3.0f, 3.0f, 3.0f, 1.0f),
|
|
/* XMM3333 */ vec128f(3.0f, 3.0f, 3.0f, 3.0f),
|
|
/* XMMSignMaskPS */
|
|
vec128i(0x80000000u, 0x80000000u, 0x80000000u, 0x80000000u),
|
|
/* XMMSignMaskPD */
|
|
vec128i(0x00000000u, 0x80000000u, 0x00000000u, 0x80000000u),
|
|
/* XMMAbsMaskPS */
|
|
vec128i(0x7FFFFFFFu, 0x7FFFFFFFu, 0x7FFFFFFFu, 0x7FFFFFFFu),
|
|
/* XMMAbsMaskPD */
|
|
vec128i(0xFFFFFFFFu, 0x7FFFFFFFu, 0xFFFFFFFFu, 0x7FFFFFFFu),
|
|
/* XMMByteSwapMask */
|
|
vec128i(0x00010203u, 0x04050607u, 0x08090A0Bu, 0x0C0D0E0Fu),
|
|
/* XMMByteOrderMask */
|
|
vec128i(0x01000302u, 0x05040706u, 0x09080B0Au, 0x0D0C0F0Eu),
|
|
/* XMMPermuteControl15 */ vec128b(15),
|
|
/* XMMPermuteByteMask */ vec128b(0x1F),
|
|
/* XMMPackD3DCOLORSat */ vec128i(0x404000FFu),
|
|
/* XMMPackD3DCOLOR */
|
|
vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu, 0x0C000408u),
|
|
/* XMMUnpackD3DCOLOR */
|
|
vec128i(0xFFFFFF0Eu, 0xFFFFFF0Du, 0xFFFFFF0Cu, 0xFFFFFF0Fu),
|
|
/* XMMPackFLOAT16_2 */
|
|
vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu, 0x01000302u),
|
|
/* XMMUnpackFLOAT16_2 */
|
|
vec128i(0x0D0C0F0Eu, 0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu),
|
|
/* XMMPackFLOAT16_4 */
|
|
vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0x01000302u, 0x05040706u),
|
|
/* XMMUnpackFLOAT16_4 */
|
|
vec128i(0x09080B0Au, 0x0D0C0F0Eu, 0xFFFFFFFFu, 0xFFFFFFFFu),
|
|
/* XMMPackSHORT_Min */ vec128i(0x403F8001u),
|
|
/* XMMPackSHORT_Max */ vec128i(0x40407FFFu),
|
|
/* XMMPackSHORT_2 */
|
|
vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu, 0x01000504u),
|
|
/* XMMPackSHORT_4 */
|
|
vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0x01000504u, 0x09080D0Cu),
|
|
/* XMMUnpackSHORT_2 */
|
|
vec128i(0xFFFF0F0Eu, 0xFFFF0D0Cu, 0xFFFFFFFFu, 0xFFFFFFFFu),
|
|
/* XMMUnpackSHORT_4 */
|
|
vec128i(0xFFFF0B0Au, 0xFFFF0908u, 0xFFFF0F0Eu, 0xFFFF0D0Cu),
|
|
/* XMMUnpackSHORT_Overflow */ vec128i(0x403F8000u),
|
|
/* XMMPackUINT_2101010_MinUnpacked */
|
|
vec128i(0x403FFE01u, 0x403FFE01u, 0x403FFE01u, 0x40400000u),
|
|
/* XMMPackUINT_2101010_MaxUnpacked */
|
|
vec128i(0x404001FFu, 0x404001FFu, 0x404001FFu, 0x40400003u),
|
|
/* XMMPackUINT_2101010_MaskUnpacked */
|
|
vec128i(0x3FFu, 0x3FFu, 0x3FFu, 0x3u),
|
|
/* XMMPackUINT_2101010_MaskPacked */
|
|
vec128i(0x3FFu, 0x3FFu << 10, 0x3FFu << 20, 0x3u << 30),
|
|
/* XMMPackUINT_2101010_Shift */ vec128i(0, 10, 20, 30),
|
|
/* XMMUnpackUINT_2101010_Overflow */ vec128i(0x403FFE00u),
|
|
/* XMMPackULONG_4202020_MinUnpacked */
|
|
vec128i(0x40380001u, 0x40380001u, 0x40380001u, 0x40400000u),
|
|
/* XMMPackULONG_4202020_MaxUnpacked */
|
|
vec128i(0x4047FFFFu, 0x4047FFFFu, 0x4047FFFFu, 0x4040000Fu),
|
|
/* XMMPackULONG_4202020_MaskUnpacked */
|
|
vec128i(0xFFFFFu, 0xFFFFFu, 0xFFFFFu, 0xFu),
|
|
/* XMMPackULONG_4202020_PermuteXZ */
|
|
vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0x0A0908FFu, 0xFF020100u),
|
|
/* XMMPackULONG_4202020_PermuteYW */
|
|
vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0x0CFFFF06u, 0x0504FFFFu),
|
|
/* XMMUnpackULONG_4202020_Permute */
|
|
vec128i(0xFF0E0D0Cu, 0xFF0B0A09u, 0xFF080F0Eu, 0xFFFFFF0Bu),
|
|
/* XMMUnpackULONG_4202020_Overflow */ vec128i(0x40380000u),
|
|
/* XMMOneOver255 */ vec128f(1.0f / 255.0f),
|
|
/* XMMMaskEvenPI16 */
|
|
vec128i(0x0000FFFFu, 0x0000FFFFu, 0x0000FFFFu, 0x0000FFFFu),
|
|
/* XMMShiftMaskEvenPI16 */
|
|
vec128i(0x0000000Fu, 0x0000000Fu, 0x0000000Fu, 0x0000000Fu),
|
|
/* XMMShiftMaskPS */
|
|
vec128i(0x0000001Fu, 0x0000001Fu, 0x0000001Fu, 0x0000001Fu),
|
|
/* XMMShiftByteMask */
|
|
vec128i(0x000000FFu, 0x000000FFu, 0x000000FFu, 0x000000FFu),
|
|
/* XMMSwapWordMask */
|
|
vec128i(0x03030303u, 0x03030303u, 0x03030303u, 0x03030303u),
|
|
/* XMMUnsignedDwordMax */
|
|
vec128i(0xFFFFFFFFu, 0x00000000u, 0xFFFFFFFFu, 0x00000000u),
|
|
/* XMM255 */ vec128f(255.0f),
|
|
/* XMMPI32 */ vec128i(32),
|
|
/* XMMSignMaskI8 */
|
|
vec128i(0x80808080u, 0x80808080u, 0x80808080u, 0x80808080u),
|
|
/* XMMSignMaskI16 */
|
|
vec128i(0x80008000u, 0x80008000u, 0x80008000u, 0x80008000u),
|
|
/* XMMSignMaskI32 */
|
|
vec128i(0x80000000u, 0x80000000u, 0x80000000u, 0x80000000u),
|
|
/* XMMSignMaskF32 */
|
|
vec128i(0x80000000u, 0x80000000u, 0x80000000u, 0x80000000u),
|
|
/* XMMShortMinPS */ vec128f(SHRT_MIN),
|
|
/* XMMShortMaxPS */ vec128f(SHRT_MAX),
|
|
/* XMMIntMin */ vec128i(INT_MIN),
|
|
/* XMMIntMax */ vec128i(INT_MAX),
|
|
/* XMMIntMaxPD */ vec128d(INT_MAX),
|
|
/* XMMPosIntMinPS */ vec128f((float)0x80000000u),
|
|
/* XMMQNaN */ vec128i(0x7FC00000u),
|
|
/* XMMInt127 */ vec128i(0x7Fu),
|
|
/* XMM2To32 */ vec128f(0x1.0p32f),
|
|
/* XMMFloatInf */ vec128i(0x7f800000),
|
|
|
|
/* XMMIntsToBytes*/
|
|
v128_setr_bytes(0, 4, 8, 12, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
|
|
0x80, 0x80, 0x80, 0x80),
|
|
/*XMMShortsToBytes*/
|
|
v128_setr_bytes(0, 2, 4, 6, 8, 10, 12, 14, 0x80, 0x80, 0x80, 0x80, 0x80,
|
|
0x80, 0x80, 0x80),
|
|
/*XMMLVSLTableBase*/
|
|
vec128b(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15),
|
|
/*XMMLVSRTableBase*/
|
|
vec128b(16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31),
|
|
/* XMMSingleDenormalMask */
|
|
vec128i(0x7f800000),
|
|
/* XMMThreeFloatMask */
|
|
vec128i(~0U, ~0U, ~0U, 0U),
|
|
/*XMMXenosF16ExtRangeStart*/
|
|
vec128f(65504),
|
|
/*XMMVSRShlByteshuf*/
|
|
v128_setr_bytes(13, 14, 15, 8, 9, 10, 11, 4, 5, 6, 7, 0, 1, 2, 3, 0x80),
|
|
// XMMVSRMask
|
|
vec128b(1),
|
|
/*
|
|
XMMF16UnpackLCPI2
|
|
*/
|
|
|
|
vec128i(0x38000000),
|
|
/*
|
|
XMMF16UnpackLCPI3
|
|
*/
|
|
vec128q(0x7fe000007fe000ULL),
|
|
|
|
/* XMMF16PackLCPI0*/
|
|
vec128i(0x8000000),
|
|
/*XMMF16PackLCPI2*/
|
|
vec128i(0x47ffe000),
|
|
/*XMMF16PackLCPI3*/
|
|
vec128i(0xc7800000),
|
|
/*XMMF16PackLCPI4
|
|
*/
|
|
vec128i(0xf7fdfff),
|
|
/*XMMF16PackLCPI5*/
|
|
vec128i(0x7fff),
|
|
/*
|
|
XMMF16PackLCPI6
|
|
*/
|
|
vec128i(0x8000)
|
|
|
|
};
|
|
|
|
void* X64Emitter::FindByteConstantOffset(unsigned bytevalue) {
|
|
for (auto& vec : xmm_consts) {
|
|
for (auto& u8 : vec.u8) {
|
|
if (u8 == bytevalue) {
|
|
return reinterpret_cast<void*>(backend_->emitter_data() +
|
|
(&u8 - &xmm_consts[0].u8[0]));
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
void* X64Emitter::FindWordConstantOffset(unsigned wordvalue) {
|
|
for (auto& vec : xmm_consts) {
|
|
for (auto& u16 : vec.u16) {
|
|
if (u16 == wordvalue) {
|
|
return reinterpret_cast<void*>(backend_->emitter_data() +
|
|
((&u16 - &xmm_consts[0].u16[0]) * 2));
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
void* X64Emitter::FindDwordConstantOffset(unsigned dwordvalue) {
|
|
for (auto& vec : xmm_consts) {
|
|
for (auto& u32 : vec.u32) {
|
|
if (u32 == dwordvalue) {
|
|
return reinterpret_cast<void*>(backend_->emitter_data() +
|
|
((&u32 - &xmm_consts[0].u32[0]) * 4));
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
void* X64Emitter::FindQwordConstantOffset(uint64_t qwordvalue) {
|
|
for (auto& vec : xmm_consts) {
|
|
for (auto& u64 : vec.u64) {
|
|
if (u64 == qwordvalue) {
|
|
return reinterpret_cast<void*>(backend_->emitter_data() +
|
|
((&u64 - &xmm_consts[0].u64[0]) * 8));
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
// First location to try and place constants.
|
|
static const uintptr_t kConstDataLocation = 0x20000000;
|
|
static const uintptr_t kConstDataSize = sizeof(xmm_consts);
|
|
|
|
// Increment the location by this amount for every allocation failure.
|
|
static const uintptr_t kConstDataIncrement = 0x00001000;
|
|
|
|
// This function places constant data that is used by the emitter later on.
|
|
// Only called once and used by multiple instances of the emitter.
|
|
//
|
|
// TODO(DrChat): This should be placed in the code cache with the code, but
|
|
// doing so requires RIP-relative addressing, which is difficult to support
|
|
// given the current setup.
|
|
uintptr_t X64Emitter::PlaceConstData() {
|
|
uint8_t* ptr = reinterpret_cast<uint8_t*>(kConstDataLocation);
|
|
void* mem = nullptr;
|
|
while (!mem) {
|
|
mem = memory::AllocFixed(
|
|
ptr, xe::round_up(kConstDataSize, memory::page_size()),
|
|
memory::AllocationType::kReserveCommit, memory::PageAccess::kReadWrite);
|
|
|
|
ptr += kConstDataIncrement;
|
|
}
|
|
|
|
// The pointer must not be greater than 31 bits.
|
|
assert_zero(reinterpret_cast<uintptr_t>(mem) & ~0x7FFFFFFF);
|
|
std::memcpy(mem, xmm_consts, sizeof(xmm_consts));
|
|
memory::Protect(mem, kConstDataSize, memory::PageAccess::kReadOnly, nullptr);
|
|
|
|
return reinterpret_cast<uintptr_t>(mem);
|
|
}
|
|
|
|
void X64Emitter::FreeConstData(uintptr_t data) {
|
|
memory::DeallocFixed(reinterpret_cast<void*>(data), 0,
|
|
memory::DeallocationType::kRelease);
|
|
}
|
|
|
|
Xbyak::Address X64Emitter::GetXmmConstPtr(XmmConst id) {
|
|
// Load through fixed constant table setup by PlaceConstData.
|
|
// It's important that the pointer is not signed, as it will be sign-extended.
|
|
return ptr[reinterpret_cast<void*>(backend_->emitter_data() +
|
|
sizeof(vec128_t) * id)];
|
|
}
|
|
// Implies possible StashXmm(0, ...)!
|
|
void X64Emitter::LoadConstantXmm(Xbyak::Xmm dest, const vec128_t& v) {
|
|
// https://www.agner.org/optimize/optimizing_assembly.pdf
|
|
// 13.4 Generating constants
|
|
if (!v.low && !v.high) {
|
|
// 0000...
|
|
vpxor(dest, dest);
|
|
} else if (v.low == ~uint64_t(0) && v.high == ~uint64_t(0)) {
|
|
// 1111...
|
|
vpcmpeqb(dest, dest);
|
|
} else {
|
|
for (size_t i = 0; i < (kConstDataSize / sizeof(vec128_t)); ++i) {
|
|
if (xmm_consts[i] == v) {
|
|
vmovapd(dest, GetXmmConstPtr((XmmConst)i));
|
|
return;
|
|
}
|
|
}
|
|
if (IsFeatureEnabled(kX64EmitAVX2)) {
|
|
bool all_equal_bytes = true;
|
|
|
|
unsigned firstbyte = v.u8[0];
|
|
for (unsigned i = 1; i < 16; ++i) {
|
|
if (v.u8[i] != firstbyte) {
|
|
all_equal_bytes = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (all_equal_bytes) {
|
|
void* bval = FindByteConstantOffset(firstbyte);
|
|
|
|
if (bval) {
|
|
vpbroadcastb(dest, byte[bval]);
|
|
return;
|
|
}
|
|
// didnt find existing mem with the value
|
|
mov(byte[rsp + kStashOffset], firstbyte);
|
|
vpbroadcastb(dest, byte[rsp + kStashOffset]);
|
|
return;
|
|
}
|
|
|
|
bool all_equal_words = true;
|
|
unsigned firstword = v.u16[0];
|
|
for (unsigned i = 1; i < 8; ++i) {
|
|
if (v.u16[i] != firstword) {
|
|
all_equal_words = false;
|
|
break;
|
|
}
|
|
}
|
|
if (all_equal_words) {
|
|
void* wval = FindWordConstantOffset(firstword);
|
|
if (wval) {
|
|
vpbroadcastw(dest, word[wval]);
|
|
return;
|
|
}
|
|
// didnt find existing mem with the value
|
|
mov(word[rsp + kStashOffset], firstword);
|
|
vpbroadcastw(dest, word[rsp + kStashOffset]);
|
|
return;
|
|
}
|
|
|
|
bool all_equal_dwords = true;
|
|
unsigned firstdword = v.u32[0];
|
|
for (unsigned i = 1; i < 4; ++i) {
|
|
if (v.u32[i] != firstdword) {
|
|
all_equal_dwords = false;
|
|
break;
|
|
}
|
|
}
|
|
if (all_equal_dwords) {
|
|
void* dwval = FindDwordConstantOffset(firstdword);
|
|
if (dwval) {
|
|
vpbroadcastd(dest, dword[dwval]);
|
|
return;
|
|
}
|
|
mov(dword[rsp + kStashOffset], firstdword);
|
|
vpbroadcastd(dest, dword[rsp + kStashOffset]);
|
|
return;
|
|
}
|
|
|
|
bool all_equal_qwords = v.low == v.high;
|
|
|
|
if (all_equal_qwords) {
|
|
void* qwval = FindQwordConstantOffset(v.low);
|
|
if (qwval) {
|
|
vpbroadcastq(dest, qword[qwval]);
|
|
return;
|
|
}
|
|
MovMem64(rsp + kStashOffset, v.low);
|
|
vpbroadcastq(dest, qword[rsp + kStashOffset]);
|
|
return;
|
|
}
|
|
}
|
|
|
|
for (auto& vec : xmm_consts) {
|
|
if (vec.low == v.low && vec.high == v.high) {
|
|
vmovdqa(dest,
|
|
ptr[reinterpret_cast<void*>(backend_->emitter_data() +
|
|
((&vec - &xmm_consts[0]) * 16))]);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (v.high == 0 && v.low == ~0ULL) {
|
|
vpcmpeqb(dest, dest);
|
|
movq(dest, dest);
|
|
return;
|
|
}
|
|
if (v.high == 0) {
|
|
if ((v.low & 0xFFFFFFFF) == v.low) {
|
|
mov(dword[rsp + kStashOffset], static_cast<unsigned>(v.low));
|
|
movd(dest, dword[rsp + kStashOffset]);
|
|
return;
|
|
}
|
|
MovMem64(rsp + kStashOffset, v.low);
|
|
movq(dest, qword[rsp + kStashOffset]);
|
|
return;
|
|
}
|
|
|
|
// TODO(benvanik): see what other common values are.
|
|
// TODO(benvanik): build constant table - 99% are reused.
|
|
MovMem64(rsp + kStashOffset, v.low);
|
|
MovMem64(rsp + kStashOffset + 8, v.high);
|
|
vmovdqa(dest, ptr[rsp + kStashOffset]);
|
|
}
|
|
}
|
|
|
|
void X64Emitter::LoadConstantXmm(Xbyak::Xmm dest, float v) {
|
|
union {
|
|
float f;
|
|
uint32_t i;
|
|
} x = {v};
|
|
if (!x.i) {
|
|
// +0.0f (but not -0.0f because it may be used to flip the sign via xor).
|
|
vxorps(dest, dest);
|
|
} else if (x.i == ~uint32_t(0)) {
|
|
// 1111...
|
|
vcmpeqss(dest, dest);
|
|
} else {
|
|
unsigned raw_bits = *reinterpret_cast<unsigned*>(&v);
|
|
|
|
for (size_t i = 0; i < (kConstDataSize / sizeof(vec128_t)); ++i) {
|
|
if (xmm_consts[i].u32[0] == raw_bits) {
|
|
vmovss(dest, GetXmmConstPtr((XmmConst)i));
|
|
return;
|
|
}
|
|
}
|
|
// TODO(benvanik): see what other common values are.
|
|
// TODO(benvanik): build constant table - 99% are reused.
|
|
mov(eax, x.i);
|
|
vmovd(dest, eax);
|
|
}
|
|
}
|
|
|
|
void X64Emitter::LoadConstantXmm(Xbyak::Xmm dest, double v) {
|
|
union {
|
|
double d;
|
|
uint64_t i;
|
|
} x = {v};
|
|
if (!x.i) {
|
|
// +0.0 (but not -0.0 because it may be used to flip the sign via xor).
|
|
vxorpd(dest, dest);
|
|
} else if (x.i == ~uint64_t(0)) {
|
|
// 1111...
|
|
vcmpeqpd(dest, dest);
|
|
} else {
|
|
uint64_t raw_bits = *reinterpret_cast<uint64_t*>(&v);
|
|
|
|
for (size_t i = 0; i < (kConstDataSize / sizeof(vec128_t)); ++i) {
|
|
if (xmm_consts[i].u64[0] == raw_bits) {
|
|
vmovsd(dest, GetXmmConstPtr((XmmConst)i));
|
|
return;
|
|
}
|
|
}
|
|
// TODO(benvanik): see what other common values are.
|
|
// TODO(benvanik): build constant table - 99% are reused.
|
|
mov(rax, x.i);
|
|
vmovq(dest, rax);
|
|
}
|
|
}
|
|
|
|
Xbyak::Address X64Emitter::StashXmm(int index, const Xbyak::Xmm& r) {
|
|
auto addr = ptr[rsp + kStashOffset + (index * 16)];
|
|
vmovups(addr, r);
|
|
return addr;
|
|
}
|
|
|
|
Xbyak::Address X64Emitter::StashConstantXmm(int index, float v) {
|
|
union {
|
|
float f;
|
|
uint32_t i;
|
|
} x = {v};
|
|
auto addr = rsp + kStashOffset + (index * 16);
|
|
MovMem64(addr, x.i);
|
|
MovMem64(addr + 8, 0);
|
|
return ptr[addr];
|
|
}
|
|
|
|
Xbyak::Address X64Emitter::StashConstantXmm(int index, double v) {
|
|
union {
|
|
double d;
|
|
uint64_t i;
|
|
} x = {v};
|
|
auto addr = rsp + kStashOffset + (index * 16);
|
|
MovMem64(addr, x.i);
|
|
MovMem64(addr + 8, 0);
|
|
return ptr[addr];
|
|
}
|
|
|
|
Xbyak::Address X64Emitter::StashConstantXmm(int index, const vec128_t& v) {
|
|
auto addr = rsp + kStashOffset + (index * 16);
|
|
MovMem64(addr, v.low);
|
|
MovMem64(addr + 8, v.high);
|
|
return ptr[addr];
|
|
}
|
|
static bool IsVectorCompare(const Instr* i) {
|
|
hir::Opcode op = i->opcode->num;
|
|
return op >= hir::OPCODE_VECTOR_COMPARE_EQ &&
|
|
op <= hir::OPCODE_VECTOR_COMPARE_UGE;
|
|
}
|
|
|
|
static bool IsFlaggedVectorOp(const Instr* i) {
|
|
if (IsVectorCompare(i)) {
|
|
return true;
|
|
}
|
|
hir::Opcode op = i->opcode->num;
|
|
using namespace hir;
|
|
switch (op) {
|
|
case OPCODE_VECTOR_SUB:
|
|
case OPCODE_VECTOR_ADD:
|
|
case OPCODE_SWIZZLE:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static SimdDomain GetDomainForFlaggedVectorOp(const hir::Instr* df) {
|
|
switch (df->flags) { // check what datatype we compared as
|
|
case hir::INT16_TYPE:
|
|
case hir::INT32_TYPE:
|
|
case hir::INT8_TYPE:
|
|
case hir::INT64_TYPE:
|
|
return SimdDomain::INTEGER;
|
|
case hir::FLOAT32_TYPE:
|
|
case hir::FLOAT64_TYPE: // pretty sure float64 doesnt occur with vectors.
|
|
// here for completeness
|
|
return SimdDomain::FLOATING;
|
|
default:
|
|
return SimdDomain::DONTCARE;
|
|
}
|
|
return SimdDomain::DONTCARE;
|
|
}
|
|
// this list is incomplete
|
|
static bool IsDefiniteIntegerDomainOpcode(hir::Opcode opc) {
|
|
using namespace hir;
|
|
switch (opc) {
|
|
case OPCODE_LOAD_VECTOR_SHL:
|
|
case OPCODE_LOAD_VECTOR_SHR:
|
|
case OPCODE_VECTOR_CONVERT_F2I:
|
|
case OPCODE_VECTOR_MIN: // there apparently is no FLOAT32_TYPE for min/maxs
|
|
// flags
|
|
case OPCODE_VECTOR_MAX:
|
|
case OPCODE_VECTOR_SHL:
|
|
case OPCODE_VECTOR_SHR:
|
|
case OPCODE_VECTOR_SHA:
|
|
case OPCODE_VECTOR_ROTATE_LEFT:
|
|
case OPCODE_VECTOR_AVERAGE: // apparently no float32 type for this
|
|
case OPCODE_EXTRACT:
|
|
case OPCODE_INSERT: // apparently no f32 type for these two
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
static bool IsDefiniteFloatingDomainOpcode(hir::Opcode opc) {
|
|
using namespace hir;
|
|
switch (opc) {
|
|
case OPCODE_VECTOR_CONVERT_I2F:
|
|
case OPCODE_VECTOR_DENORMFLUSH:
|
|
case OPCODE_DOT_PRODUCT_3:
|
|
case OPCODE_DOT_PRODUCT_4:
|
|
case OPCODE_LOG2:
|
|
case OPCODE_POW2:
|
|
case OPCODE_RECIP:
|
|
case OPCODE_ROUND:
|
|
case OPCODE_SQRT:
|
|
case OPCODE_MUL:
|
|
case OPCODE_MUL_SUB:
|
|
case OPCODE_MUL_ADD:
|
|
case OPCODE_ABS:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
SimdDomain X64Emitter::DeduceSimdDomain(const hir::Value* for_value) {
|
|
hir::Instr* df = for_value->def;
|
|
if (!df) {
|
|
// todo: visit uses to figure out domain
|
|
return SimdDomain::DONTCARE;
|
|
|
|
} else {
|
|
SimdDomain result = SimdDomain::DONTCARE;
|
|
|
|
if (IsFlaggedVectorOp(df)) {
|
|
result = GetDomainForFlaggedVectorOp(df);
|
|
} else if (IsDefiniteIntegerDomainOpcode(df->opcode->num)) {
|
|
result = SimdDomain::INTEGER;
|
|
} else if (IsDefiniteFloatingDomainOpcode(df->opcode->num)) {
|
|
result = SimdDomain::FLOATING;
|
|
}
|
|
|
|
// todo: check if still dontcare, if so, visit uses of the value to figure
|
|
// it out
|
|
return result;
|
|
}
|
|
|
|
return SimdDomain::DONTCARE;
|
|
}
|
|
Xbyak::Address X64Emitter::GetBackendCtxPtr(int offset_in_x64backendctx) const {
|
|
/*
|
|
index context ptr negatively to get to backend ctx field
|
|
*/
|
|
ptrdiff_t delta = (-static_cast<ptrdiff_t>(sizeof(X64BackendContext))) +
|
|
offset_in_x64backendctx;
|
|
return ptr[GetContextReg() + static_cast<int>(delta)];
|
|
}
|
|
Xbyak::Label& X64Emitter::AddToTail(TailEmitCallback callback,
|
|
uint32_t alignment) {
|
|
TailEmitter emitter{};
|
|
emitter.func = std::move(callback);
|
|
emitter.alignment = alignment;
|
|
tail_code_.push_back(std::move(emitter));
|
|
return tail_code_.back().label;
|
|
}
|
|
Xbyak::Label& X64Emitter::NewCachedLabel() {
|
|
Xbyak::Label* tmp = new Xbyak::Label;
|
|
label_cache_.push_back(tmp);
|
|
return *tmp;
|
|
}
|
|
|
|
template <bool switching_to_fpu>
|
|
static void ChangeMxcsrModeDynamicHelper(X64Emitter& e) {
|
|
auto flags = e.GetBackendFlagsPtr();
|
|
if (switching_to_fpu) {
|
|
e.btr(flags, 0); // bit 0 set to 0 = is fpu mode
|
|
} else {
|
|
e.bts(flags, 0); // bit 0 set to 1 = is vmx mode
|
|
}
|
|
Xbyak::Label& come_back = e.NewCachedLabel();
|
|
|
|
Xbyak::Label& reload_bailout =
|
|
e.AddToTail([&come_back](X64Emitter& e, Xbyak::Label& thislabel) {
|
|
e.L(thislabel);
|
|
if (switching_to_fpu) {
|
|
e.LoadFpuMxcsrDirect();
|
|
} else {
|
|
e.LoadVmxMxcsrDirect();
|
|
}
|
|
e.jmp(come_back, X64Emitter::T_NEAR);
|
|
});
|
|
if (switching_to_fpu) {
|
|
e.jc(reload_bailout,
|
|
X64Emitter::T_NEAR); // if carry flag was set, we were VMX mxcsr mode.
|
|
} else {
|
|
e.jnc(
|
|
reload_bailout,
|
|
X64Emitter::T_NEAR); // if carry flag was set, we were VMX mxcsr mode.
|
|
}
|
|
e.L(come_back);
|
|
}
|
|
|
|
bool X64Emitter::ChangeMxcsrMode(MXCSRMode new_mode, bool already_set) {
|
|
if (cvars::enable_incorrect_roundingmode_behavior) {
|
|
return false; // no MXCSR mode handling!
|
|
}
|
|
if (new_mode == mxcsr_mode_) {
|
|
return false;
|
|
}
|
|
assert_true(new_mode != MXCSRMode::Unknown);
|
|
|
|
if (mxcsr_mode_ == MXCSRMode::Unknown) {
|
|
// check the mode dynamically
|
|
mxcsr_mode_ = new_mode;
|
|
if (!already_set) {
|
|
if (new_mode == MXCSRMode::Fpu) {
|
|
ChangeMxcsrModeDynamicHelper<true>(*this);
|
|
} else if (new_mode == MXCSRMode::Vmx) {
|
|
ChangeMxcsrModeDynamicHelper<false>(*this);
|
|
} else {
|
|
assert_unhandled_case(new_mode);
|
|
}
|
|
} else { // even if already set, we still need to update flags to reflect
|
|
// our mode
|
|
if (new_mode == MXCSRMode::Fpu) {
|
|
btr(GetBackendFlagsPtr(), 0);
|
|
} else if (new_mode == MXCSRMode::Vmx) {
|
|
bts(GetBackendFlagsPtr(), 0);
|
|
} else {
|
|
assert_unhandled_case(new_mode);
|
|
}
|
|
}
|
|
} else {
|
|
mxcsr_mode_ = new_mode;
|
|
if (!already_set) {
|
|
if (new_mode == MXCSRMode::Fpu) {
|
|
LoadFpuMxcsrDirect();
|
|
btr(GetBackendFlagsPtr(), 0);
|
|
return true;
|
|
} else if (new_mode == MXCSRMode::Vmx) {
|
|
LoadVmxMxcsrDirect();
|
|
bts(GetBackendFlagsPtr(), 0);
|
|
return true;
|
|
} else {
|
|
assert_unhandled_case(new_mode);
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
void X64Emitter::LoadFpuMxcsrDirect() {
|
|
vldmxcsr(GetBackendCtxPtr(offsetof(X64BackendContext, mxcsr_fpu)));
|
|
}
|
|
void X64Emitter::LoadVmxMxcsrDirect() {
|
|
vldmxcsr(GetBackendCtxPtr(offsetof(X64BackendContext, mxcsr_vmx)));
|
|
}
|
|
Xbyak::Address X64Emitter::GetBackendFlagsPtr() const {
|
|
Xbyak::Address pt = GetBackendCtxPtr(offsetof(X64BackendContext, flags));
|
|
pt.setBit(32);
|
|
return pt;
|
|
}
|
|
} // namespace x64
|
|
} // namespace backend
|
|
} // namespace cpu
|
|
} // namespace xe
|