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SubzeroReactor.cpp
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SubzeroReactor.cpp
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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "Reactor.hpp"
#include "Optimizer.hpp"
#include "src/IceTypes.h"
#include "src/IceCfg.h"
#include "src/IceELFStreamer.h"
#include "src/IceGlobalContext.h"
#include "src/IceCfgNode.h"
#include "src/IceELFObjectWriter.h"
#include "src/IceGlobalInits.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/raw_os_ostream.h"
#if defined(_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif // !WIN32_LEAN_AND_MEAN
#ifndef NOMINMAX
#define NOMINMAX
#endif // !NOMINMAX
#include <Windows.h>
#else
#include <sys/mman.h>
#if !defined(MAP_ANONYMOUS)
#define MAP_ANONYMOUS MAP_ANON
#endif
#endif
//#include <mutex>
#include <limits>
#include <iostream>
#include <cassert>
namespace
{
Ice::GlobalContext *context = nullptr;
Ice::Cfg *function = nullptr;
Ice::CfgNode *basicBlock = nullptr;
Ice::CfgLocalAllocatorScope *allocator = nullptr;
sw::Routine *routine = nullptr;
std::mutex codegenMutex;
Ice::ELFFileStreamer *elfFile = nullptr;
Ice::Fdstream *out = nullptr;
}
namespace
{
#if !defined(__i386__) && defined(_M_IX86)
#define __i386__ 1
#endif
#if !defined(__x86_64__) && (defined(_M_AMD64) || defined (_M_X64))
#define __x86_64__ 1
#endif
class CPUID
{
public:
const static bool ARM;
const static bool SSE4_1;
private:
static void cpuid(int registers[4], int info)
{
#if defined(__i386__) || defined(__x86_64__)
#if defined(_WIN32)
__cpuid(registers, info);
#else
__asm volatile("cpuid": "=a" (registers[0]), "=b" (registers[1]), "=c" (registers[2]), "=d" (registers[3]): "a" (info));
#endif
#else
registers[0] = 0;
registers[1] = 0;
registers[2] = 0;
registers[3] = 0;
#endif
}
static bool detectARM()
{
#if defined(__arm__)
return true;
#elif defined(__i386__) || defined(__x86_64__)
return false;
#else
#error "Unknown architecture"
#endif
}
static bool detectSSE4_1()
{
#if defined(__i386__) || defined(__x86_64__)
int registers[4];
cpuid(registers, 1);
return (registers[2] & 0x00080000) != 0;
#else
return false;
#endif
}
};
const bool CPUID::ARM = CPUID::detectARM();
const bool CPUID::SSE4_1 = CPUID::detectSSE4_1();
const bool emulateIntrinsics = false;
const bool emulateMismatchedBitCast = CPUID::ARM;
}
namespace sw
{
enum EmulatedType
{
EmulatedShift = 16,
EmulatedV2 = 2 << EmulatedShift,
EmulatedV4 = 4 << EmulatedShift,
EmulatedV8 = 8 << EmulatedShift,
EmulatedBits = EmulatedV2 | EmulatedV4 | EmulatedV8,
Type_v2i32 = Ice::IceType_v4i32 | EmulatedV2,
Type_v4i16 = Ice::IceType_v8i16 | EmulatedV4,
Type_v2i16 = Ice::IceType_v8i16 | EmulatedV2,
Type_v8i8 = Ice::IceType_v16i8 | EmulatedV8,
Type_v4i8 = Ice::IceType_v16i8 | EmulatedV4,
Type_v2f32 = Ice::IceType_v4f32 | EmulatedV2,
};
class Value : public Ice::Operand {};
class SwitchCases : public Ice::InstSwitch {};
class BasicBlock : public Ice::CfgNode {};
Ice::Type T(Type *t)
{
static_assert(static_cast<unsigned int>(Ice::IceType_NUM) < static_cast<unsigned int>(EmulatedBits), "Ice::Type overlaps with our emulated types!");
return (Ice::Type)(reinterpret_cast<std::intptr_t>(t) & ~EmulatedBits);
}
Type *T(Ice::Type t)
{
return reinterpret_cast<Type*>(t);
}
Type *T(EmulatedType t)
{
return reinterpret_cast<Type*>(t);
}
Value *V(Ice::Operand *v)
{
return reinterpret_cast<Value*>(v);
}
BasicBlock *B(Ice::CfgNode *b)
{
return reinterpret_cast<BasicBlock*>(b);
}
static size_t typeSize(Type *type)
{
if(reinterpret_cast<std::intptr_t>(type) & EmulatedBits)
{
switch(reinterpret_cast<std::intptr_t>(type))
{
case Type_v2i32: return 8;
case Type_v4i16: return 8;
case Type_v2i16: return 4;
case Type_v8i8: return 8;
case Type_v4i8: return 4;
case Type_v2f32: return 8;
default: assert(false);
}
}
return Ice::typeWidthInBytes(T(type));
}
Optimization optimization[10] = {InstructionCombining, Disabled};
using ElfHeader = std::conditional<sizeof(void*) == 8, Elf64_Ehdr, Elf32_Ehdr>::type;
using SectionHeader = std::conditional<sizeof(void*) == 8, Elf64_Shdr, Elf32_Shdr>::type;
inline const SectionHeader *sectionHeader(const ElfHeader *elfHeader)
{
return reinterpret_cast<const SectionHeader*>((intptr_t)elfHeader + elfHeader->e_shoff);
}
inline const SectionHeader *elfSection(const ElfHeader *elfHeader, int index)
{
return §ionHeader(elfHeader)[index];
}
static void *relocateSymbol(const ElfHeader *elfHeader, const Elf32_Rel &relocation, const SectionHeader &relocationTable)
{
const SectionHeader *target = elfSection(elfHeader, relocationTable.sh_info);
intptr_t address = (intptr_t)elfHeader + target->sh_offset;
int32_t *patchSite = (int*)(address + relocation.r_offset);
uint32_t index = relocation.getSymbol();
int table = relocationTable.sh_link;
void *symbolValue = nullptr;
if(index != SHN_UNDEF)
{
if(table == SHN_UNDEF) return nullptr;
const SectionHeader *symbolTable = elfSection(elfHeader, table);
uint32_t symtab_entries = symbolTable->sh_size / symbolTable->sh_entsize;
if(index >= symtab_entries)
{
assert(index < symtab_entries && "Symbol Index out of range");
return nullptr;
}
intptr_t symbolAddress = (intptr_t)elfHeader + symbolTable->sh_offset;
Elf32_Sym &symbol = ((Elf32_Sym*)symbolAddress)[index];
uint16_t section = symbol.st_shndx;
if(section != SHN_UNDEF && section < SHN_LORESERVE)
{
const SectionHeader *target = elfSection(elfHeader, symbol.st_shndx);
symbolValue = reinterpret_cast<void*>((intptr_t)elfHeader + symbol.st_value + target->sh_offset);
}
else
{
return nullptr;
}
}
if(CPUID::ARM)
{
switch(relocation.getType())
{
case R_ARM_NONE:
// No relocation
break;
case R_ARM_MOVW_ABS_NC:
{
uint32_t thumb = 0; // Calls to Thumb code not supported.
uint32_t lo = (uint32_t)(intptr_t)symbolValue | thumb;
*patchSite = (*patchSite & 0xFFF0F000) | ((lo & 0xF000) << 4) | (lo & 0x0FFF);
}
break;
case R_ARM_MOVT_ABS:
{
uint32_t hi = (uint32_t)(intptr_t)(symbolValue) >> 16;
*patchSite = (*patchSite & 0xFFF0F000) | ((hi & 0xF000) << 4) | (hi & 0x0FFF);
}
break;
default:
assert(false && "Unsupported relocation type");
return nullptr;
}
}
else
{
switch(relocation.getType())
{
case R_386_NONE:
// No relocation
break;
case R_386_32:
*patchSite = (int32_t)((intptr_t)symbolValue + *patchSite);
break;
// case R_386_PC32:
// *patchSite = (int32_t)((intptr_t)symbolValue + *patchSite - (intptr_t)patchSite);
// break;
default:
assert(false && "Unsupported relocation type");
return nullptr;
}
}
return symbolValue;
}
static void *relocateSymbol(const ElfHeader *elfHeader, const Elf64_Rela &relocation, const SectionHeader &relocationTable)
{
const SectionHeader *target = elfSection(elfHeader, relocationTable.sh_info);
intptr_t address = (intptr_t)elfHeader + target->sh_offset;
int32_t *patchSite = (int*)(address + relocation.r_offset);
uint32_t index = relocation.getSymbol();
int table = relocationTable.sh_link;
void *symbolValue = nullptr;
if(index != SHN_UNDEF)
{
if(table == SHN_UNDEF) return nullptr;
const SectionHeader *symbolTable = elfSection(elfHeader, table);
uint32_t symtab_entries = symbolTable->sh_size / symbolTable->sh_entsize;
if(index >= symtab_entries)
{
assert(index < symtab_entries && "Symbol Index out of range");
return nullptr;
}
intptr_t symbolAddress = (intptr_t)elfHeader + symbolTable->sh_offset;
Elf64_Sym &symbol = ((Elf64_Sym*)symbolAddress)[index];
uint16_t section = symbol.st_shndx;
if(section != SHN_UNDEF && section < SHN_LORESERVE)
{
const SectionHeader *target = elfSection(elfHeader, symbol.st_shndx);
symbolValue = reinterpret_cast<void*>((intptr_t)elfHeader + symbol.st_value + target->sh_offset);
}
else
{
return nullptr;
}
}
switch(relocation.getType())
{
case R_X86_64_NONE:
// No relocation
break;
case R_X86_64_64:
*(int64_t*)patchSite = (int64_t)((intptr_t)symbolValue + *(int64_t*)patchSite) + relocation.r_addend;
break;
case R_X86_64_PC32:
*patchSite = (int32_t)((intptr_t)symbolValue + *patchSite - (intptr_t)patchSite) + relocation.r_addend;
break;
case R_X86_64_32S:
*patchSite = (int32_t)((intptr_t)symbolValue + *patchSite) + relocation.r_addend;
break;
default:
assert(false && "Unsupported relocation type");
return nullptr;
}
return symbolValue;
}
void *loadImage(uint8_t *const elfImage, size_t &codeSize)
{
ElfHeader *elfHeader = (ElfHeader*)elfImage;
if(!elfHeader->checkMagic())
{
return nullptr;
}
// Expect ELF bitness to match platform
assert(sizeof(void*) == 8 ? elfHeader->getFileClass() == ELFCLASS64 : elfHeader->getFileClass() == ELFCLASS32);
#if defined(__i386__)
assert(sizeof(void*) == 4 && elfHeader->e_machine == EM_386);
#elif defined(__x86_64__)
assert(sizeof(void*) == 8 && elfHeader->e_machine == EM_X86_64);
#elif defined(__arm__)
assert(sizeof(void*) == 4 && elfHeader->e_machine == EM_ARM);
#else
#error "Unsupported platform"
#endif
SectionHeader *sectionHeader = (SectionHeader*)(elfImage + elfHeader->e_shoff);
void *entry = nullptr;
for(int i = 0; i < elfHeader->e_shnum; i++)
{
if(sectionHeader[i].sh_type == SHT_PROGBITS)
{
if(sectionHeader[i].sh_flags & SHF_EXECINSTR)
{
entry = elfImage + sectionHeader[i].sh_offset;
codeSize = sectionHeader[i].sh_size;
}
}
else if(sectionHeader[i].sh_type == SHT_REL)
{
assert(sizeof(void*) == 4 && "UNIMPLEMENTED"); // Only expected/implemented for 32-bit code
for(Elf32_Word index = 0; index < sectionHeader[i].sh_size / sectionHeader[i].sh_entsize; index++)
{
const Elf32_Rel &relocation = ((const Elf32_Rel*)(elfImage + sectionHeader[i].sh_offset))[index];
relocateSymbol(elfHeader, relocation, sectionHeader[i]);
}
}
else if(sectionHeader[i].sh_type == SHT_RELA)
{
assert(sizeof(void*) == 8 && "UNIMPLEMENTED"); // Only expected/implemented for 64-bit code
for(Elf32_Word index = 0; index < sectionHeader[i].sh_size / sectionHeader[i].sh_entsize; index++)
{
const Elf64_Rela &relocation = ((const Elf64_Rela*)(elfImage + sectionHeader[i].sh_offset))[index];
relocateSymbol(elfHeader, relocation, sectionHeader[i]);
}
}
}
return entry;
}
template<typename T>
struct ExecutableAllocator
{
ExecutableAllocator() {};
template<class U> ExecutableAllocator(const ExecutableAllocator<U> &other) {};
using value_type = T;
using size_type = std::size_t;
T *allocate(size_type n)
{
#if defined(_WIN32)
return (T*)VirtualAlloc(NULL, sizeof(T) * n, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
#else
return (T*)mmap(nullptr, sizeof(T) * n, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
#endif
}
void deallocate(T *p, size_type n)
{
#if defined(_WIN32)
VirtualFree(p, 0, MEM_RELEASE);
#else
munmap(p, sizeof(T) * n);
#endif
}
};
class ELFMemoryStreamer : public Ice::ELFStreamer, public Routine
{
ELFMemoryStreamer(const ELFMemoryStreamer &) = delete;
ELFMemoryStreamer &operator=(const ELFMemoryStreamer &) = delete;
public:
ELFMemoryStreamer() : Routine(), entry(nullptr)
{
position = 0;
buffer.reserve(0x1000);
}
~ELFMemoryStreamer() override
{
#if defined(_WIN32)
if(buffer.size() != 0)
{
DWORD exeProtection;
VirtualProtect(&buffer[0], buffer.size(), oldProtection, &exeProtection);
}
#endif
}
void write8(uint8_t Value) override
{
if(position == (uint64_t)buffer.size())
{
buffer.push_back(Value);
position++;
}
else if(position < (uint64_t)buffer.size())
{
buffer[position] = Value;
position++;
}
else assert(false && "UNIMPLEMENTED");
}
void writeBytes(llvm::StringRef Bytes) override
{
std::size_t oldSize = buffer.size();
buffer.resize(oldSize + Bytes.size());
memcpy(&buffer[oldSize], Bytes.begin(), Bytes.size());
position += Bytes.size();
}
uint64_t tell() const override { return position; }
void seek(uint64_t Off) override { position = Off; }
const void *getEntry() override
{
if(!entry)
{
position = std::numeric_limits<std::size_t>::max(); // Can't stream more data after this
size_t codeSize = 0;
entry = loadImage(&buffer[0], codeSize);
#if defined(_WIN32)
VirtualProtect(&buffer[0], buffer.size(), PAGE_EXECUTE_READ, &oldProtection);
FlushInstructionCache(GetCurrentProcess(), NULL, 0);
#else
mprotect(&buffer[0], buffer.size(), PROT_READ | PROT_EXEC);
__builtin___clear_cache((char*)entry, (char*)entry + codeSize);
#endif
}
return entry;
}
private:
void *entry;
std::vector<uint8_t, ExecutableAllocator<uint8_t>> buffer;
std::size_t position;
#if defined(_WIN32)
DWORD oldProtection;
#endif
};
Nucleus::Nucleus()
{
::codegenMutex.lock(); // Reactor is currently not thread safe
Ice::ClFlags &Flags = Ice::ClFlags::Flags;
Ice::ClFlags::getParsedClFlags(Flags);
#if defined(__arm__)
Flags.setTargetArch(Ice::Target_ARM32);
Flags.setTargetInstructionSet(Ice::ARM32InstructionSet_HWDivArm);
#else // x86
Flags.setTargetArch(sizeof(void*) == 8 ? Ice::Target_X8664 : Ice::Target_X8632);
Flags.setTargetInstructionSet(CPUID::SSE4_1 ? Ice::X86InstructionSet_SSE4_1 : Ice::X86InstructionSet_SSE2);
#endif
Flags.setOutFileType(Ice::FT_Elf);
Flags.setOptLevel(Ice::Opt_2);
Flags.setApplicationBinaryInterface(Ice::ABI_Platform);
Flags.setVerbose(false ? Ice::IceV_Most : Ice::IceV_None);
Flags.setDisableHybridAssembly(true);
static llvm::raw_os_ostream cout(std::cout);
static llvm::raw_os_ostream cerr(std::cerr);
if(false) // Write out to a file
{
std::error_code errorCode;
::out = new Ice::Fdstream("out.o", errorCode, llvm::sys::fs::F_None);
::elfFile = new Ice::ELFFileStreamer(*out);
::context = new Ice::GlobalContext(&cout, &cout, &cerr, elfFile);
}
else
{
ELFMemoryStreamer *elfMemory = new ELFMemoryStreamer();
::context = new Ice::GlobalContext(&cout, &cout, &cerr, elfMemory);
::routine = elfMemory;
}
}
Nucleus::~Nucleus()
{
delete ::routine;
delete ::allocator;
delete ::function;
delete ::context;
delete ::elfFile;
delete ::out;
::codegenMutex.unlock();
}
Routine *Nucleus::acquireRoutine(const wchar_t *name, bool runOptimizations)
{
if(basicBlock->getInsts().empty() || basicBlock->getInsts().back().getKind() != Ice::Inst::Ret)
{
createRetVoid();
}
std::wstring wideName(name);
std::string asciiName(wideName.begin(), wideName.end());
::function->setFunctionName(Ice::GlobalString::createWithString(::context, asciiName));
optimize();
::function->translate();
assert(!::function->hasError());
auto globals = ::function->getGlobalInits();
if(globals && !globals->empty())
{
::context->getGlobals()->merge(globals.get());
}
::context->emitFileHeader();
::function->emitIAS();
auto assembler = ::function->releaseAssembler();
auto objectWriter = ::context->getObjectWriter();
assembler->alignFunction();
objectWriter->writeFunctionCode(::function->getFunctionName(), false, assembler.get());
::context->lowerGlobals("last");
::context->lowerConstants();
::context->lowerJumpTables();
objectWriter->setUndefinedSyms(::context->getConstantExternSyms());
objectWriter->writeNonUserSections();
Routine *handoffRoutine = ::routine;
::routine = nullptr;
return handoffRoutine;
}
void Nucleus::optimize()
{
sw::optimize(::function);
}
Value *Nucleus::allocateStackVariable(Type *t, int arraySize)
{
Ice::Type type = T(t);
int typeSize = Ice::typeWidthInBytes(type);
int totalSize = typeSize * (arraySize ? arraySize : 1);
auto bytes = Ice::ConstantInteger32::create(::context, type, totalSize);
auto address = ::function->makeVariable(T(getPointerType(t)));
auto alloca = Ice::InstAlloca::create(::function, address, bytes, typeSize);
::function->getEntryNode()->getInsts().push_front(alloca);
return V(address);
}
BasicBlock *Nucleus::createBasicBlock()
{
return B(::function->makeNode());
}
BasicBlock *Nucleus::getInsertBlock()
{
return B(::basicBlock);
}
void Nucleus::setInsertBlock(BasicBlock *basicBlock)
{
// assert(::basicBlock->getInsts().back().getTerminatorEdges().size() >= 0 && "Previous basic block must have a terminator");
::basicBlock = basicBlock;
}
void Nucleus::createFunction(Type *ReturnType, std::vector<Type*> &Params)
{
uint32_t sequenceNumber = 0;
::function = Ice::Cfg::create(::context, sequenceNumber).release();
::allocator = new Ice::CfgLocalAllocatorScope(::function);
for(Type *type : Params)
{
Ice::Variable *arg = ::function->makeVariable(T(type));
::function->addArg(arg);
}
Ice::CfgNode *node = ::function->makeNode();
::function->setEntryNode(node);
::basicBlock = node;
}
Value *Nucleus::getArgument(unsigned int index)
{
return V(::function->getArgs()[index]);
}
void Nucleus::createRetVoid()
{
Ice::InstRet *ret = Ice::InstRet::create(::function);
::basicBlock->appendInst(ret);
}
void Nucleus::createRet(Value *v)
{
Ice::InstRet *ret = Ice::InstRet::create(::function, v);
::basicBlock->appendInst(ret);
}
void Nucleus::createBr(BasicBlock *dest)
{
auto br = Ice::InstBr::create(::function, dest);
::basicBlock->appendInst(br);
}
void Nucleus::createCondBr(Value *cond, BasicBlock *ifTrue, BasicBlock *ifFalse)
{
auto br = Ice::InstBr::create(::function, cond, ifTrue, ifFalse);
::basicBlock->appendInst(br);
}
static bool isCommutative(Ice::InstArithmetic::OpKind op)
{
switch(op)
{
case Ice::InstArithmetic::Add:
case Ice::InstArithmetic::Fadd:
case Ice::InstArithmetic::Mul:
case Ice::InstArithmetic::Fmul:
case Ice::InstArithmetic::And:
case Ice::InstArithmetic::Or:
case Ice::InstArithmetic::Xor:
return true;
default:
return false;
}
}
static Value *createArithmetic(Ice::InstArithmetic::OpKind op, Value *lhs, Value *rhs)
{
assert(lhs->getType() == rhs->getType() || llvm::isa<Ice::Constant>(rhs));
bool swapOperands = llvm::isa<Ice::Constant>(lhs) && isCommutative(op);
Ice::Variable *result = ::function->makeVariable(lhs->getType());
Ice::InstArithmetic *arithmetic = Ice::InstArithmetic::create(::function, op, result, swapOperands ? rhs : lhs, swapOperands ? lhs : rhs);
::basicBlock->appendInst(arithmetic);
return V(result);
}
Value *Nucleus::createAdd(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Add, lhs, rhs);
}
Value *Nucleus::createSub(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Sub, lhs, rhs);
}
Value *Nucleus::createMul(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Mul, lhs, rhs);
}
Value *Nucleus::createUDiv(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Udiv, lhs, rhs);
}
Value *Nucleus::createSDiv(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Sdiv, lhs, rhs);
}
Value *Nucleus::createFAdd(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Fadd, lhs, rhs);
}
Value *Nucleus::createFSub(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Fsub, lhs, rhs);
}
Value *Nucleus::createFMul(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Fmul, lhs, rhs);
}
Value *Nucleus::createFDiv(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Fdiv, lhs, rhs);
}
Value *Nucleus::createURem(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Urem, lhs, rhs);
}
Value *Nucleus::createSRem(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Srem, lhs, rhs);
}
Value *Nucleus::createFRem(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Frem, lhs, rhs);
}
Value *Nucleus::createShl(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Shl, lhs, rhs);
}
Value *Nucleus::createLShr(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Lshr, lhs, rhs);
}
Value *Nucleus::createAShr(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Ashr, lhs, rhs);
}
Value *Nucleus::createAnd(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::And, lhs, rhs);
}
Value *Nucleus::createOr(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Or, lhs, rhs);
}
Value *Nucleus::createXor(Value *lhs, Value *rhs)
{
return createArithmetic(Ice::InstArithmetic::Xor, lhs, rhs);
}
Value *Nucleus::createNeg(Value *v)
{
return createSub(createNullValue(T(v->getType())), v);
}
Value *Nucleus::createFNeg(Value *v)
{
double c[4] = {-0.0, -0.0, -0.0, -0.0};
Value *negativeZero = Ice::isVectorType(v->getType()) ?
createConstantVector(c, T(v->getType())) :
V(::context->getConstantFloat(-0.0f));
return createFSub(negativeZero, v);
}
Value *Nucleus::createNot(Value *v)
{
if(Ice::isScalarIntegerType(v->getType()))
{
return createXor(v, V(::context->getConstantInt(v->getType(), -1)));
}
else // Vector
{
int64_t c[16] = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
return createXor(v, createConstantVector(c, T(v->getType())));
}
}
Value *Nucleus::createLoad(Value *ptr, Type *type, bool isVolatile, unsigned int align)
{
int valueType = (int)reinterpret_cast<intptr_t>(type);
Ice::Variable *result = ::function->makeVariable(T(type));
if((valueType & EmulatedBits) && (align != 0)) // Narrow vector not stored on stack.
{
if(emulateIntrinsics)
{
if(typeSize(type) == 4)
{
auto pointer = RValue<Pointer<Byte>>(ptr);
Int x = *Pointer<Int>(pointer);
Int4 vector;
vector = Insert(vector, x, 0);
auto bitcast = Ice::InstCast::create(::function, Ice::InstCast::Bitcast, result, vector.loadValue());
::basicBlock->appendInst(bitcast);
}
else if(typeSize(type) == 8)
{
auto pointer = RValue<Pointer<Byte>>(ptr);
Int x = *Pointer<Int>(pointer);
Int y = *Pointer<Int>(pointer + 4);
Int4 vector;
vector = Insert(vector, x, 0);
vector = Insert(vector, y, 1);
auto bitcast = Ice::InstCast::create(::function, Ice::InstCast::Bitcast, result, vector.loadValue());
::basicBlock->appendInst(bitcast);
}
else assert(false);
}
else
{
const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::LoadSubVector, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
auto target = ::context->getConstantUndef(Ice::IceType_i32);
auto load = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
load->addArg(ptr);
load->addArg(::context->getConstantInt32(typeSize(type)));
::basicBlock->appendInst(load);
}
}
else
{
auto load = Ice::InstLoad::create(::function, result, ptr, align);
::basicBlock->appendInst(load);
}
return V(result);
}
Value *Nucleus::createStore(Value *value, Value *ptr, Type *type, bool isVolatile, unsigned int align)
{
int valueType = (int)reinterpret_cast<intptr_t>(type);
if((valueType & EmulatedBits) && (align != 0)) // Narrow vector not stored on stack.
{
if(emulateIntrinsics)
{
if(typeSize(type) == 4)
{
Ice::Variable *vector = ::function->makeVariable(Ice::IceType_v4i32);
auto bitcast = Ice::InstCast::create(::function, Ice::InstCast::Bitcast, vector, value);
::basicBlock->appendInst(bitcast);
RValue<Int4> v(V(vector));
auto pointer = RValue<Pointer<Byte>>(ptr);
Int x = Extract(v, 0);
*Pointer<Int>(pointer) = x;
}
else if(typeSize(type) == 8)
{
Ice::Variable *vector = ::function->makeVariable(Ice::IceType_v4i32);
auto bitcast = Ice::InstCast::create(::function, Ice::InstCast::Bitcast, vector, value);
::basicBlock->appendInst(bitcast);
RValue<Int4> v(V(vector));
auto pointer = RValue<Pointer<Byte>>(ptr);
Int x = Extract(v, 0);
*Pointer<Int>(pointer) = x;
Int y = Extract(v, 1);
*Pointer<Int>(pointer + 4) = y;
}
else assert(false);
}
else
{
const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::StoreSubVector, Ice::Intrinsics::SideEffects_T, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_T};
auto target = ::context->getConstantUndef(Ice::IceType_i32);
auto store = Ice::InstIntrinsicCall::create(::function, 3, nullptr, target, intrinsic);
store->addArg(value);
store->addArg(ptr);
store->addArg(::context->getConstantInt32(typeSize(type)));
::basicBlock->appendInst(store);
}
}
else
{
assert(value->getType() == T(type));
auto store = Ice::InstStore::create(::function, value, ptr, align);
::basicBlock->appendInst(store);
}
return value;
}
Value *Nucleus::createGEP(Value *ptr, Type *type, Value *index, bool unsignedIndex)
{
assert(index->getType() == Ice::IceType_i32);
if(auto *constant = llvm::dyn_cast<Ice::ConstantInteger32>(index))
{
int32_t offset = constant->getValue() * (int)typeSize(type);
if(offset == 0)
{
return ptr;
}
return createAdd(ptr, createConstantInt(offset));
}
if(!Ice::isByteSizedType(T(type)))
{
index = createMul(index, createConstantInt((int)typeSize(type)));
}
if(sizeof(void*) == 8)
{
if(unsignedIndex)
{
index = createZExt(index, T(Ice::IceType_i64));
}
else
{
index = createSExt(index, T(Ice::IceType_i64));
}
}
return createAdd(ptr, index);
}
Value *Nucleus::createAtomicAdd(Value *ptr, Value *value)
{
assert(false && "UNIMPLEMENTED"); return nullptr;
}
static Value *createCast(Ice::InstCast::OpKind op, Value *v, Type *destType)
{
if(v->getType() == T(destType))
{
return v;
}