// 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 "Debug.hpp"

#include "Optimizer.hpp"
#include "ExecutableMemory.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"
#include "llvm/Support/Compiler.h"

#if __has_feature(memory_sanitizer)
#include <sanitizer/msan_interface.h>
#endif

#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>

namespace rr
{
	class ELFMemoryStreamer;
}

namespace
{
	// Default configuration settings. Must be accessed under mutex lock.
	std::mutex defaultConfigLock;
	rr::Config &defaultConfig()
	{
		// This uses a static in a function to avoid the cost of a global static
		// initializer. See http://neugierig.org/software/chromium/notes/2011/08/static-initializers.html
		static rr::Config config = rr::Config::Edit()
			.set(rr::Optimization::Level::Default)
			.apply({});
		return config;
	}

	Ice::GlobalContext *context = nullptr;
	Ice::Cfg *function = nullptr;
	Ice::CfgNode *basicBlock = nullptr;
	Ice::CfgLocalAllocatorScope *allocator = nullptr;
	rr::ELFMemoryStreamer *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

	static Ice::OptLevel toIce(rr::Optimization::Level level)
	{
		switch (level)
		{
			// Note that Opt_0 and Opt_1 are not implemented by Subzero
			case rr::Optimization::Level::None:       return Ice::Opt_m1;
			case rr::Optimization::Level::Less:       return Ice::Opt_m1;
			case rr::Optimization::Level::Default:    return Ice::Opt_2;
			case rr::Optimization::Level::Aggressive: return Ice::Opt_2;
			default: UNREACHABLE("Unknown Optimization Level %d", int(level));
		}
		return Ice::Opt_2;
	}

	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__) || defined(__aarch64__)
				return true;
			#elif defined(__i386__) || defined(__x86_64__)
				return false;
			#elif defined(__mips__)
				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;

	constexpr bool subzeroDumpEnabled = false;
	constexpr bool subzeroEmitTextAsm = false;

#if !ALLOW_DUMP
	static_assert(!subzeroDumpEnabled, "Compile Subzero with ALLOW_DUMP=1 for subzeroDumpEnabled");
	static_assert(!subzeroEmitTextAsm, "Compile Subzero with ALLOW_DUMP=1 for subzeroEmitTextAsm");
#endif
}

namespace rr
{
	const Capabilities Caps =
	{
		false, // CoroutinesSupported
	};

	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));
	}

	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 &sectionHeader(elfHeader)[index];
	}

	static void *relocateSymbol(const ElfHeader *elfHeader, const Elf32_Rel &relocation, const SectionHeader &relocationTable)
	{
		const SectionHeader *target = elfSection(elfHeader, relocationTable.sh_info);

		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;
			}
		}

		intptr_t address = (intptr_t)elfHeader + target->sh_offset;
		unaligned_ptr<int32_t> patchSite = (int32_t*)(address + relocation.r_offset);

		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);

		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;
			}
		}

		intptr_t address = (intptr_t)elfHeader + target->sh_offset;
		unaligned_ptr<int32_t> patchSite32 = (int32_t*)(address + relocation.r_offset);
		unaligned_ptr<int64_t> patchSite64 = (int64_t*)(address + relocation.r_offset);

		switch(relocation.getType())
		{
		case R_X86_64_NONE:
			// No relocation
			break;
		case R_X86_64_64:
			*patchSite64 = (int64_t)((intptr_t)symbolValue + *patchSite64 + relocation.r_addend);
			break;
		case R_X86_64_PC32:
			*patchSite32 = (int32_t)((intptr_t)symbolValue + *patchSite32 - (intptr_t)patchSite32 + relocation.r_addend);
			break;
		case R_X86_64_32S:
			*patchSite32 = (int32_t)((intptr_t)symbolValue + *patchSite32 + 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);
		#elif defined(__aarch64__)
			ASSERT(sizeof(void*) == 8 && elfHeader->e_machine == EM_AARCH64);
		#elif defined(__mips__)
			ASSERT(sizeof(void*) == 4 && elfHeader->e_machine == EM_MIPS);
		#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)
		{
			return (T*)allocateExecutable(sizeof(T) * n);
		}

		void deallocate(T *p, size_type n)
		{
			deallocateExecutable(p, sizeof(T) * n);
		}
	};

	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(int index) override
		{
			ASSERT(index == 0); // Subzero does not support multiple entry points per routine yet.
			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;
		}

		const void* addConstantData(const void* data, size_t size)
		{
			auto buf = std::unique_ptr<uint8_t[]>(new uint8_t[size]);
			memcpy(buf.get(), data, size);
			auto ptr = buf.get();
			constantData.emplace_back(std::move(buf));
			return ptr;
		}

	private:
		void *entry;
		std::vector<uint8_t, ExecutableAllocator<uint8_t>> buffer;
		std::size_t position;
		std::vector<std::unique_ptr<uint8_t[]>> constantData;

		#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);
		#elif defined(__mips__)
			Flags.setTargetArch(Ice::Target_MIPS32);
			Flags.setTargetInstructionSet(Ice::BaseInstructionSet);
		#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(toIce(getDefaultConfig().getOptimization().getLevel()));
		Flags.setApplicationBinaryInterface(Ice::ABI_Platform);
		Flags.setVerbose(subzeroDumpEnabled ? 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 (subzeroEmitTextAsm)
		{
			// Decorate text asm with liveness info
			Flags.setDecorateAsm(true);
		}

		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();
	}

	void Nucleus::setDefaultConfig(const Config &cfg)
	{
		std::unique_lock<std::mutex> lock(::defaultConfigLock);
		::defaultConfig() = cfg;
	}

	void Nucleus::adjustDefaultConfig(const Config::Edit &cfgEdit)
	{
		std::unique_lock<std::mutex> lock(::defaultConfigLock);
		auto &config = ::defaultConfig();
		config = cfgEdit.apply(config);
	}

	Config Nucleus::getDefaultConfig()
	{
		std::unique_lock<std::mutex> lock(::defaultConfigLock);
		return ::defaultConfig();
	}

	std::shared_ptr<Routine> Nucleus::acquireRoutine(const char *name, const Config::Edit &cfgEdit /* = Config::Edit::None */)
	{
		if (subzeroDumpEnabled)
		{
			// Output dump strings immediately, rather than once buffer is full. Useful for debugging.
			context->getStrDump().SetUnbuffered();
		}

		if(basicBlock->getInsts().empty() || basicBlock->getInsts().back().getKind() != Ice::Inst::Ret)
		{
			createRetVoid();
		}

		::function->setFunctionName(Ice::GlobalString::createWithString(::context, name));

		rr::optimize(::function);

		::function->computeInOutEdges();
		ASSERT(!::function->hasError());

		::function->translate();
		ASSERT(!::function->hasError());

		auto globals = ::function->getGlobalInits();

		if(globals && !globals->empty())
		{
			::context->getGlobals()->merge(globals.get());
		}

		::context->emitFileHeader();

		if (subzeroEmitTextAsm)
		{
			::function->emit();
		}

		::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 std::shared_ptr<Routine>(handoffRoutine);
	}

	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");

		Variable::materializeAll();

		::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()
	{
		// Code generated after this point is unreachable, so any variables
		// being read can safely return an undefined value. We have to avoid
		// materializing variables after the terminator ret instruction.
		Variable::killUnmaterialized();

		Ice::InstRet *ret = Ice::InstRet::create(::function);
		::basicBlock->appendInst(ret);
	}

	void Nucleus::createRet(Value *v)
	{
		// Code generated after this point is unreachable, so any variables
		// being read can safely return an undefined value. We have to avoid
		// materializing variables after the terminator ret instruction.
		Variable::killUnmaterialized();

		Ice::InstRet *ret = Ice::InstRet::create(::function, v);
		::basicBlock->appendInst(ret);
	}

	void Nucleus::createBr(BasicBlock *dest)
	{
		Variable::materializeAll();

		auto br = Ice::InstBr::create(::function, dest);
		::basicBlock->appendInst(br);
	}

	void Nucleus::createCondBr(Value *cond, BasicBlock *ifTrue, BasicBlock *ifFalse)
	{
		Variable::materializeAll();

		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, bool atomic, std::memory_order memoryOrder)
	{
		ASSERT(!atomic);  // Unimplemented
		ASSERT(memoryOrder == std::memory_order_relaxed);  // Unimplemented

		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 UNREACHABLE("typeSize(type): %d", int(typeSize(type)));
			}
			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, bool atomic, std::memory_order memoryOrder)
	{
		ASSERT(!atomic);  // Unimplemented
		ASSERT(memoryOrder == std::memory_order_relaxed);  // Unimplemented

		#if __has_feature(memory_sanitizer)
			// Mark all (non-stack) memory writes as initialized by calling __msan_unpoison
			if(align != 0)
			{
				auto call = Ice::InstCall::create(::function, 2, nullptr, ::context->getConstantInt64(reinterpret_cast<intptr_t>(__msan_unpoison)), false);
				call->addArg(ptr);
				call->addArg(::context->getConstantInt64(typeSize(type)));
				::basicBlock->appendInst(call);
			}
		#endif

		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 UNREACHABLE("typeSize(type): %d", int(typeSize(type)));
			}
			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, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicAdd");
		return nullptr;
	}

	Value *Nucleus::createAtomicSub(Value *ptr, Value *value, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicSub");
		return nullptr;
	}

	Value *Nucleus::createAtomicAnd(Value *ptr, Value *value, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicAnd");
		return nullptr;
	}

	Value *Nucleus::createAtomicOr(Value *ptr, Value *value, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicOr");
		return nullptr;
	}

	Value *Nucleus::createAtomicXor(Value *ptr, Value *value, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicXor");
		return nullptr;
	}

	Value *Nucleus::createAtomicMin(Value *ptr, Value *value, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicMin");
		return nullptr;
	}

	Value *Nucleus::createAtomicMax(Value *ptr, Value *value, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicMax");
		return nullptr;
	}

	Value *Nucleus::createAtomicUMin(Value *ptr, Value *value, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicUMin");
		return nullptr;
	}

	Value *Nucleus::createAtomicUMax(Value *ptr, Value *value, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicUMax");
		return nullptr;
	}

	Value *Nucleus::createAtomicExchange(Value *ptr, Value *value, std::memory_order memoryOrder)
	{
		UNIMPLEMENTED("createAtomicExchange");
		return nullptr;
	}

	Value *Nucleus::createAtomicCompareExchange(Value *ptr, Value *value, Value *compare, std::memory_order memoryOrderEqual, std::memory_order memoryOrderUnequal)
	{
		UNIMPLEMENTED("createAtomicCompareExchange");
		return nullptr;
	}

	static Value *createCast(Ice::InstCast::OpKind op, Value *v, Type *destType)
	{
		if(v->getType() == T(destType))
		{
			return v;
		}

		Ice::Variable *result = ::function->makeVariable(T(destType));
		Ice::InstCast *cast = Ice::InstCast::create(::function, op, result, v);
		::basicBlock->appendInst(cast);

		return V(result);
	}

	Value *Nucleus::createTrunc(Value *v, Type *destType)
	{
		return createCast(Ice::InstCast::Trunc, v, destType);
	}

	Value *Nucleus::createZExt(Value *v, Type *destType)
	{
		return createCast(Ice::InstCast::Zext, v, destType);
	}

	Value *Nucleus::createSExt(Value *v, Type *destType)
	{
		return createCast(Ice::InstCast::Sext, v, destType);
	}

	Value *Nucleus::createFPToSI(Value *v, Type *destType)
	{
		return createCast(Ice::InstCast::Fptosi, v, destType);
	}

	Value *Nucleus::createSIToFP(Value *v, Type *destType)
	{
		return createCast(Ice::InstCast::Sitofp, v, destType);
	}

	Value *Nucleus::createFPTrunc(Value *v, Type *destType)
	{
		return createCast(Ice::InstCast::Fptrunc, v, destType);
	}

	Value *Nucleus::createFPExt(Value *v, Type *destType)
	{
		return createCast(Ice::InstCast::Fpext, v, destType);
	}

	Value *Nucleus::createBitCast(Value *v, Type *destType)
	{
		// Bitcasts must be between types of the same logical size. But with emulated narrow vectors we need
		// support for casting between scalars and wide vectors. For platforms where this is not supported,
		// emulate them by writing to the stack and reading back as the destination type.
		if(emulateMismatchedBitCast)
		{
			if(!Ice::isVectorType(v->getType()) && Ice::isVectorType(T(destType)))
			{
				Value *address = allocateStackVariable(destType);
				createStore(v, address, T(v->getType()));
				return createLoad(address, destType);
			}
			else if(Ice::isVectorType(v->getType()) && !Ice::isVectorType(T(destType)))
			{
				Value *address = allocateStackVariable(T(v->getType()));
				createStore(v, address, T(v->getType()));
				return createLoad(address, destType);
			}
		}

		return createCast(Ice::InstCast::Bitcast, v, destType);
	}

	static Value *createIntCompare(Ice::InstIcmp::ICond condition, Value *lhs, Value *rhs)
	{
		ASSERT(lhs->getType() == rhs->getType());

		auto result = ::function->makeVariable(Ice::isScalarIntegerType(lhs->getType()) ? Ice::IceType_i1 : lhs->getType());
		auto cmp = Ice::InstIcmp::create(::function, condition, result, lhs, rhs);
		::basicBlock->appendInst(cmp);

		return V(result);
	}

	Value *Nucleus::createPtrEQ(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Eq, lhs, rhs);
	}

	Value *Nucleus::createICmpEQ(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Eq, lhs, rhs);
	}

	Value *Nucleus::createICmpNE(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Ne, lhs, rhs);
	}

	Value *Nucleus::createICmpUGT(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Ugt, lhs, rhs);
	}

	Value *Nucleus::createICmpUGE(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Uge, lhs, rhs);
	}

	Value *Nucleus::createICmpULT(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Ult, lhs, rhs);
	}

	Value *Nucleus::createICmpULE(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Ule, lhs, rhs);
	}

	Value *Nucleus::createICmpSGT(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Sgt, lhs, rhs);
	}

	Value *Nucleus::createICmpSGE(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Sge, lhs, rhs);
	}

	Value *Nucleus::createICmpSLT(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Slt, lhs, rhs);
	}

	Value *Nucleus::createICmpSLE(Value *lhs, Value *rhs)
	{
		return createIntCompare(Ice::InstIcmp::Sle, lhs, rhs);
	}

	static Value *createFloatCompare(Ice::InstFcmp::FCond condition, Value *lhs, Value *rhs)
	{
		ASSERT(lhs->getType() == rhs->getType());
		ASSERT(Ice::isScalarFloatingType(lhs->getType()) || lhs->getType() == Ice::IceType_v4f32);

		auto result = ::function->makeVariable(Ice::isScalarFloatingType(lhs->getType()) ? Ice::IceType_i1 : Ice::IceType_v4i32);
		auto cmp = Ice::InstFcmp::create(::function, condition, result, lhs, rhs);
		::basicBlock->appendInst(cmp);

		return V(result);
	}

	Value *Nucleus::createFCmpOEQ(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Oeq, lhs, rhs);
	}

	Value *Nucleus::createFCmpOGT(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Ogt, lhs, rhs);
	}

	Value *Nucleus::createFCmpOGE(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Oge, lhs, rhs);
	}

	Value *Nucleus::createFCmpOLT(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Olt, lhs, rhs);
	}

	Value *Nucleus::createFCmpOLE(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Ole, lhs, rhs);
	}

	Value *Nucleus::createFCmpONE(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::One, lhs, rhs);
	}

	Value *Nucleus::createFCmpORD(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Ord, lhs, rhs);
	}

	Value *Nucleus::createFCmpUNO(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Uno, lhs, rhs);
	}

	Value *Nucleus::createFCmpUEQ(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Ueq, lhs, rhs);
	}

	Value *Nucleus::createFCmpUGT(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Ugt, lhs, rhs);
	}

	Value *Nucleus::createFCmpUGE(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Uge, lhs, rhs);
	}

	Value *Nucleus::createFCmpULT(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Ult, lhs, rhs);
	}

	Value *Nucleus::createFCmpULE(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Ule, lhs, rhs);
	}

	Value *Nucleus::createFCmpUNE(Value *lhs, Value *rhs)
	{
		return createFloatCompare(Ice::InstFcmp::Une, lhs, rhs);
	}

	Value *Nucleus::createExtractElement(Value *vector, Type *type, int index)
	{
		auto result = ::function->makeVariable(T(type));
		auto extract = Ice::InstExtractElement::create(::function, result, vector, ::context->getConstantInt32(index));
		::basicBlock->appendInst(extract);

		return V(result);
	}

	Value *Nucleus::createInsertElement(Value *vector, Value *element, int index)
	{
		auto result = ::function->makeVariable(vector->getType());
		auto insert = Ice::InstInsertElement::create(::function, result, vector, element, ::context->getConstantInt32(index));
		::basicBlock->appendInst(insert);

		return V(result);
	}

	Value *Nucleus::createShuffleVector(Value *V1, Value *V2, const int *select)
	{
		ASSERT(V1->getType() == V2->getType());

		int size = Ice::typeNumElements(V1->getType());
		auto result = ::function->makeVariable(V1->getType());
		auto shuffle = Ice::InstShuffleVector::create(::function, result, V1, V2);

		for(int i = 0; i < size; i++)
		{
			shuffle->addIndex(llvm::cast<Ice::ConstantInteger32>(::context->getConstantInt32(select[i])));
		}

		::basicBlock->appendInst(shuffle);

		return V(result);
	}

	Value *Nucleus::createSelect(Value *C, Value *ifTrue, Value *ifFalse)
	{
		ASSERT(ifTrue->getType() == ifFalse->getType());

		auto result = ::function->makeVariable(ifTrue->getType());
		auto *select = Ice::InstSelect::create(::function, result, C, ifTrue, ifFalse);
		::basicBlock->appendInst(select);

		return V(result);
	}

	SwitchCases *Nucleus::createSwitch(Value *control, BasicBlock *defaultBranch, unsigned numCases)
	{
		auto switchInst = Ice::InstSwitch::create(::function, numCases, control, defaultBranch);
		::basicBlock->appendInst(switchInst);

		return reinterpret_cast<SwitchCases*>(switchInst);
	}

	void Nucleus::addSwitchCase(SwitchCases *switchCases, int label, BasicBlock *branch)
	{
		switchCases->addBranch(label, label, branch);
	}

	void Nucleus::createUnreachable()
	{
		Ice::InstUnreachable *unreachable = Ice::InstUnreachable::create(::function);
		::basicBlock->appendInst(unreachable);
	}

	Type *Nucleus::getPointerType(Type *ElementType)
	{
		if(sizeof(void*) == 8)
		{
			return T(Ice::IceType_i64);
		}
		else
		{
			return T(Ice::IceType_i32);
		}
	}

	Value *Nucleus::createNullValue(Type *Ty)
	{
		if(Ice::isVectorType(T(Ty)))
		{
			ASSERT(Ice::typeNumElements(T(Ty)) <= 16);
			int64_t c[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
			return createConstantVector(c, Ty);
		}
		else
		{
			return V(::context->getConstantZero(T(Ty)));
		}
	}

	Value *Nucleus::createConstantLong(int64_t i)
	{
		return V(::context->getConstantInt64(i));
	}

	Value *Nucleus::createConstantInt(int i)
	{
		return V(::context->getConstantInt32(i));
	}

	Value *Nucleus::createConstantInt(unsigned int i)
	{
		return V(::context->getConstantInt32(i));
	}

	Value *Nucleus::createConstantBool(bool b)
	{
		return V(::context->getConstantInt1(b));
	}

	Value *Nucleus::createConstantByte(signed char i)
	{
		return V(::context->getConstantInt8(i));
	}

	Value *Nucleus::createConstantByte(unsigned char i)
	{
		return V(::context->getConstantInt8(i));
	}

	Value *Nucleus::createConstantShort(short i)
	{
		return V(::context->getConstantInt16(i));
	}

	Value *Nucleus::createConstantShort(unsigned short i)
	{
		return V(::context->getConstantInt16(i));
	}

	Value *Nucleus::createConstantFloat(float x)
	{
		return V(::context->getConstantFloat(x));
	}

	Value *Nucleus::createNullPointer(Type *Ty)
	{
		return createNullValue(T(sizeof(void*) == 8 ? Ice::IceType_i64 : Ice::IceType_i32));
	}

	Value *Nucleus::createConstantVector(const int64_t *constants, Type *type)
	{
		const int vectorSize = 16;
		ASSERT(Ice::typeWidthInBytes(T(type)) == vectorSize);
		const int alignment = vectorSize;
		auto globalPool = ::function->getGlobalPool();

		const int64_t *i = constants;
		const double *f = reinterpret_cast<const double*>(constants);
		Ice::VariableDeclaration::DataInitializer *dataInitializer = nullptr;

		switch((int)reinterpret_cast<intptr_t>(type))
		{
		case Ice::IceType_v4i32:
		case Ice::IceType_v4i1:
			{
				const int initializer[4] = {(int)i[0], (int)i[1], (int)i[2], (int)i[3]};
				static_assert(sizeof(initializer) == vectorSize, "!");
				dataInitializer = Ice::VariableDeclaration::DataInitializer::create(globalPool, (const char*)initializer, vectorSize);
			}
			break;
		case Ice::IceType_v4f32:
			{
				const float initializer[4] = {(float)f[0], (float)f[1], (float)f[2], (float)f[3]};
				static_assert(sizeof(initializer) == vectorSize, "!");
				dataInitializer = Ice::VariableDeclaration::DataInitializer::create(globalPool, (const char*)initializer, vectorSize);
			}
			break;
		case Ice::IceType_v8i16:
		case Ice::IceType_v8i1:
			{
				const short initializer[8] = {(short)i[0], (short)i[1], (short)i[2], (short)i[3], (short)i[4], (short)i[5], (short)i[6], (short)i[7]};
				static_assert(sizeof(initializer) == vectorSize, "!");
				dataInitializer = Ice::VariableDeclaration::DataInitializer::create(globalPool, (const char*)initializer, vectorSize);
			}
			break;
		case Ice::IceType_v16i8:
		case Ice::IceType_v16i1:
			{
				const char initializer[16] = {(char)i[0], (char)i[1], (char)i[2], (char)i[3], (char)i[4], (char)i[5], (char)i[6], (char)i[7], (char)i[8], (char)i[9], (char)i[10], (char)i[11], (char)i[12], (char)i[13], (char)i[14], (char)i[15]};
				static_assert(sizeof(initializer) == vectorSize, "!");
				dataInitializer = Ice::VariableDeclaration::DataInitializer::create(globalPool, (const char*)initializer, vectorSize);
			}
			break;
		case Type_v2i32:
			{
				const int initializer[4] = {(int)i[0], (int)i[1], (int)i[0], (int)i[1]};
				static_assert(sizeof(initializer) == vectorSize, "!");
				dataInitializer = Ice::VariableDeclaration::DataInitializer::create(globalPool, (const char*)initializer, vectorSize);
			}
			break;
		case Type_v2f32:
			{
				const float initializer[4] = {(float)f[0], (float)f[1], (float)f[0], (float)f[1]};
				static_assert(sizeof(initializer) == vectorSize, "!");
				dataInitializer = Ice::VariableDeclaration::DataInitializer::create(globalPool, (const char*)initializer, vectorSize);
			}
			break;
		case Type_v4i16:
			{
				const short initializer[8] = {(short)i[0], (short)i[1], (short)i[2], (short)i[3], (short)i[0], (short)i[1], (short)i[2], (short)i[3]};
				static_assert(sizeof(initializer) == vectorSize, "!");
				dataInitializer = Ice::VariableDeclaration::DataInitializer::create(globalPool, (const char*)initializer, vectorSize);
			}
			break;
		case Type_v8i8:
			{
				const char initializer[16] = {(char)i[0], (char)i[1], (char)i[2], (char)i[3], (char)i[4], (char)i[5], (char)i[6], (char)i[7], (char)i[0], (char)i[1], (char)i[2], (char)i[3], (char)i[4], (char)i[5], (char)i[6], (char)i[7]};
				static_assert(sizeof(initializer) == vectorSize, "!");
				dataInitializer = Ice::VariableDeclaration::DataInitializer::create(globalPool, (const char*)initializer, vectorSize);
			}
			break;
		case Type_v4i8:
			{
				const char initializer[16] = {(char)i[0], (char)i[1], (char)i[2], (char)i[3], (char)i[0], (char)i[1], (char)i[2], (char)i[3], (char)i[0], (char)i[1], (char)i[2], (char)i[3], (char)i[0], (char)i[1], (char)i[2], (char)i[3]};
				static_assert(sizeof(initializer) == vectorSize, "!");
				dataInitializer = Ice::VariableDeclaration::DataInitializer::create(globalPool, (const char*)initializer, vectorSize);
			}
			break;
		default:
			UNREACHABLE("Unknown constant vector type: %d", (int)reinterpret_cast<intptr_t>(type));
		}

		auto name = Ice::GlobalString::createWithoutString(::context);
		auto *variableDeclaration = Ice::VariableDeclaration::create(globalPool);
		variableDeclaration->setName(name);
		variableDeclaration->setAlignment(alignment);
		variableDeclaration->setIsConstant(true);
		variableDeclaration->addInitializer(dataInitializer);

		::function->addGlobal(variableDeclaration);

		constexpr int32_t offset = 0;
		Ice::Operand *ptr = ::context->getConstantSym(offset, name);

		Ice::Variable *result = ::function->makeVariable(T(type));
		auto load = Ice::InstLoad::create(::function, result, ptr, alignment);
		::basicBlock->appendInst(load);

		return V(result);
	}

	Value *Nucleus::createConstantVector(const double *constants, Type *type)
	{
		return createConstantVector((const int64_t*)constants, type);
	}

	Type *Void::getType()
	{
		return T(Ice::IceType_void);
	}

	Type *Bool::getType()
	{
		return T(Ice::IceType_i1);
	}

	Type *Byte::getType()
	{
		return T(Ice::IceType_i8);
	}

	Type *SByte::getType()
	{
		return T(Ice::IceType_i8);
	}

	Type *Short::getType()
	{
		return T(Ice::IceType_i16);
	}

	Type *UShort::getType()
	{
		return T(Ice::IceType_i16);
	}

	Type *Byte4::getType()
	{
		return T(Type_v4i8);
	}

	Type *SByte4::getType()
	{
		return T(Type_v4i8);
	}

	namespace
	{
		RValue<Byte> SaturateUnsigned(RValue<Short> x)
		{
			return Byte(IfThenElse(Int(x) > 0xFF, Int(0xFF), IfThenElse(Int(x) < 0, Int(0), Int(x))));
		}

		RValue<Byte> Extract(RValue<Byte8> val, int i)
		{
			return RValue<Byte>(Nucleus::createExtractElement(val.value, Byte::getType(), i));
		}

		RValue<Byte8> Insert(RValue<Byte8> val, RValue<Byte> element, int i)
		{
			return RValue<Byte8>(Nucleus::createInsertElement(val.value, element.value, i));
		}
	}

	RValue<Byte8> AddSat(RValue<Byte8> x, RValue<Byte8> y)
	{
		if(emulateIntrinsics)
		{
			Byte8 result;
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 0)) + Int(Extract(y, 0)))), 0);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 1)) + Int(Extract(y, 1)))), 1);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 2)) + Int(Extract(y, 2)))), 2);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 3)) + Int(Extract(y, 3)))), 3);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 4)) + Int(Extract(y, 4)))), 4);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 5)) + Int(Extract(y, 5)))), 5);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 6)) + Int(Extract(y, 6)))), 6);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 7)) + Int(Extract(y, 7)))), 7);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v16i8);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::AddSaturateUnsigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto paddusb = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			paddusb->addArg(x.value);
			paddusb->addArg(y.value);
			::basicBlock->appendInst(paddusb);

			return RValue<Byte8>(V(result));
		}
	}

	RValue<Byte8> SubSat(RValue<Byte8> x, RValue<Byte8> y)
	{
		if(emulateIntrinsics)
		{
			Byte8 result;
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 0)) - Int(Extract(y, 0)))), 0);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 1)) - Int(Extract(y, 1)))), 1);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 2)) - Int(Extract(y, 2)))), 2);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 3)) - Int(Extract(y, 3)))), 3);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 4)) - Int(Extract(y, 4)))), 4);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 5)) - Int(Extract(y, 5)))), 5);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 6)) - Int(Extract(y, 6)))), 6);
			result = Insert(result, SaturateUnsigned(Short(Int(Extract(x, 7)) - Int(Extract(y, 7)))), 7);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v16i8);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::SubtractSaturateUnsigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto psubusw = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			psubusw->addArg(x.value);
			psubusw->addArg(y.value);
			::basicBlock->appendInst(psubusw);

			return RValue<Byte8>(V(result));
		}
	}

	RValue<SByte> Extract(RValue<SByte8> val, int i)
	{
		return RValue<SByte>(Nucleus::createExtractElement(val.value, SByte::getType(), i));
	}

	RValue<SByte8> Insert(RValue<SByte8> val, RValue<SByte> element, int i)
	{
		return RValue<SByte8>(Nucleus::createInsertElement(val.value, element.value, i));
	}

	RValue<SByte8> operator>>(RValue<SByte8> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			SByte8 result;
			result = Insert(result, Extract(lhs, 0) >> SByte(rhs), 0);
			result = Insert(result, Extract(lhs, 1) >> SByte(rhs), 1);
			result = Insert(result, Extract(lhs, 2) >> SByte(rhs), 2);
			result = Insert(result, Extract(lhs, 3) >> SByte(rhs), 3);
			result = Insert(result, Extract(lhs, 4) >> SByte(rhs), 4);
			result = Insert(result, Extract(lhs, 5) >> SByte(rhs), 5);
			result = Insert(result, Extract(lhs, 6) >> SByte(rhs), 6);
			result = Insert(result, Extract(lhs, 7) >> SByte(rhs), 7);

			return result;
		}
		else
		{
			#if defined(__i386__) || defined(__x86_64__)
				// SSE2 doesn't support byte vector shifts, so shift as shorts and recombine.
				RValue<Short4> hi = (As<Short4>(lhs) >> rhs) & Short4(0xFF00u);
				RValue<Short4> lo = As<Short4>(As<UShort4>((As<Short4>(lhs) << 8) >> rhs) >> 8);

				return As<SByte8>(hi | lo);
			#else
				return RValue<SByte8>(Nucleus::createAShr(lhs.value, V(::context->getConstantInt32(rhs))));
			#endif
		}
	}

	RValue<Int> SignMask(RValue<Byte8> x)
	{
		if(emulateIntrinsics || CPUID::ARM)
		{
			Byte8 xx = As<Byte8>(As<SByte8>(x) >> 7) & Byte8(0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80);
			return Int(Extract(xx, 0)) | Int(Extract(xx, 1)) | Int(Extract(xx, 2)) | Int(Extract(xx, 3)) | Int(Extract(xx, 4)) | Int(Extract(xx, 5)) | Int(Extract(xx, 6)) | Int(Extract(xx, 7));
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_i32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::SignMask, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto movmsk = Ice::InstIntrinsicCall::create(::function, 1, result, target, intrinsic);
			movmsk->addArg(x.value);
			::basicBlock->appendInst(movmsk);

			return RValue<Int>(V(result)) & 0xFF;
		}
	}

//	RValue<Byte8> CmpGT(RValue<Byte8> x, RValue<Byte8> y)
//	{
//		return RValue<Byte8>(createIntCompare(Ice::InstIcmp::Ugt, x.value, y.value));
//	}

	RValue<Byte8> CmpEQ(RValue<Byte8> x, RValue<Byte8> y)
	{
		return RValue<Byte8>(Nucleus::createICmpEQ(x.value, y.value));
	}

	Type *Byte8::getType()
	{
		return T(Type_v8i8);
	}

//	RValue<SByte8> operator<<(RValue<SByte8> lhs, unsigned char rhs)
//	{
//		return RValue<SByte8>(Nucleus::createShl(lhs.value, V(::context->getConstantInt32(rhs))));
//	}

//	RValue<SByte8> operator>>(RValue<SByte8> lhs, unsigned char rhs)
//	{
//		return RValue<SByte8>(Nucleus::createAShr(lhs.value, V(::context->getConstantInt32(rhs))));
//	}

	RValue<SByte> SaturateSigned(RValue<Short> x)
	{
		return SByte(IfThenElse(Int(x) > 0x7F, Int(0x7F), IfThenElse(Int(x) < -0x80, Int(0x80), Int(x))));
	}

	RValue<SByte8> AddSat(RValue<SByte8> x, RValue<SByte8> y)
	{
		if(emulateIntrinsics)
		{
			SByte8 result;
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 0)) + Int(Extract(y, 0)))), 0);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 1)) + Int(Extract(y, 1)))), 1);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 2)) + Int(Extract(y, 2)))), 2);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 3)) + Int(Extract(y, 3)))), 3);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 4)) + Int(Extract(y, 4)))), 4);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 5)) + Int(Extract(y, 5)))), 5);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 6)) + Int(Extract(y, 6)))), 6);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 7)) + Int(Extract(y, 7)))), 7);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v16i8);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::AddSaturateSigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto paddsb = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			paddsb->addArg(x.value);
			paddsb->addArg(y.value);
			::basicBlock->appendInst(paddsb);

			return RValue<SByte8>(V(result));
		}
	}

	RValue<SByte8> SubSat(RValue<SByte8> x, RValue<SByte8> y)
	{
		if(emulateIntrinsics)
		{
			SByte8 result;
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 0)) - Int(Extract(y, 0)))), 0);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 1)) - Int(Extract(y, 1)))), 1);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 2)) - Int(Extract(y, 2)))), 2);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 3)) - Int(Extract(y, 3)))), 3);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 4)) - Int(Extract(y, 4)))), 4);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 5)) - Int(Extract(y, 5)))), 5);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 6)) - Int(Extract(y, 6)))), 6);
			result = Insert(result, SaturateSigned(Short(Int(Extract(x, 7)) - Int(Extract(y, 7)))), 7);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v16i8);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::SubtractSaturateSigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto psubsb = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			psubsb->addArg(x.value);
			psubsb->addArg(y.value);
			::basicBlock->appendInst(psubsb);

			return RValue<SByte8>(V(result));
		}
	}

	RValue<Int> SignMask(RValue<SByte8> x)
	{
		if(emulateIntrinsics || CPUID::ARM)
		{
			SByte8 xx = (x >> 7) & SByte8(0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80);
			return Int(Extract(xx, 0)) | Int(Extract(xx, 1)) | Int(Extract(xx, 2)) | Int(Extract(xx, 3)) | Int(Extract(xx, 4)) | Int(Extract(xx, 5)) | Int(Extract(xx, 6)) | Int(Extract(xx, 7));
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_i32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::SignMask, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto movmsk = Ice::InstIntrinsicCall::create(::function, 1, result, target, intrinsic);
			movmsk->addArg(x.value);
			::basicBlock->appendInst(movmsk);

			return RValue<Int>(V(result)) & 0xFF;
		}
	}

	RValue<Byte8> CmpGT(RValue<SByte8> x, RValue<SByte8> y)
	{
		return RValue<Byte8>(createIntCompare(Ice::InstIcmp::Sgt, x.value, y.value));
	}

	RValue<Byte8> CmpEQ(RValue<SByte8> x, RValue<SByte8> y)
	{
		return RValue<Byte8>(Nucleus::createICmpEQ(x.value, y.value));
	}

	Type *SByte8::getType()
	{
		return T(Type_v8i8);
	}

	Type *Byte16::getType()
	{
		return T(Ice::IceType_v16i8);
	}

	Type *SByte16::getType()
	{
		return T(Ice::IceType_v16i8);
	}

	Type *Short2::getType()
	{
		return T(Type_v2i16);
	}

	Type *UShort2::getType()
	{
		return T(Type_v2i16);
	}

	Short4::Short4(RValue<Int4> cast)
	{
		int select[8] = {0, 2, 4, 6, 0, 2, 4, 6};
		Value *short8 = Nucleus::createBitCast(cast.value, Short8::getType());
		Value *packed = Nucleus::createShuffleVector(short8, short8, select);

		Value *int2 = RValue<Int2>(Int2(As<Int4>(packed))).value;
		Value *short4 = Nucleus::createBitCast(int2, Short4::getType());

		storeValue(short4);
	}

//	Short4::Short4(RValue<Float> cast)
//	{
//	}

	Short4::Short4(RValue<Float4> cast)
	{
		UNIMPLEMENTED("Short4::Short4(RValue<Float4> cast)");
	}

	RValue<Short4> operator<<(RValue<Short4> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			Short4 result;
			result = Insert(result, Extract(lhs, 0) << Short(rhs), 0);
			result = Insert(result, Extract(lhs, 1) << Short(rhs), 1);
			result = Insert(result, Extract(lhs, 2) << Short(rhs), 2);
			result = Insert(result, Extract(lhs, 3) << Short(rhs), 3);

			return result;
		}
		else
		{
			return RValue<Short4>(Nucleus::createShl(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<Short4> operator>>(RValue<Short4> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			Short4 result;
			result = Insert(result, Extract(lhs, 0) >> Short(rhs), 0);
			result = Insert(result, Extract(lhs, 1) >> Short(rhs), 1);
			result = Insert(result, Extract(lhs, 2) >> Short(rhs), 2);
			result = Insert(result, Extract(lhs, 3) >> Short(rhs), 3);

			return result;
		}
		else
		{
			return RValue<Short4>(Nucleus::createAShr(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<Short4> Max(RValue<Short4> x, RValue<Short4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v8i1);
		auto cmp = Ice::InstIcmp::create(::function, Ice::InstIcmp::Sle, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
		auto select = Ice::InstSelect::create(::function, result, condition, y.value, x.value);
		::basicBlock->appendInst(select);

		return RValue<Short4>(V(result));
	}

	RValue<Short4> Min(RValue<Short4> x, RValue<Short4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v8i1);
		auto cmp = Ice::InstIcmp::create(::function, Ice::InstIcmp::Sgt, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
		auto select = Ice::InstSelect::create(::function, result, condition, y.value, x.value);
		::basicBlock->appendInst(select);

		return RValue<Short4>(V(result));
	}

	RValue<Short> SaturateSigned(RValue<Int> x)
	{
		return Short(IfThenElse(x > 0x7FFF, Int(0x7FFF), IfThenElse(x < -0x8000, Int(0x8000), x)));
	}

	RValue<Short4> AddSat(RValue<Short4> x, RValue<Short4> y)
	{
		if(emulateIntrinsics)
		{
			Short4 result;
			result = Insert(result, SaturateSigned(Int(Extract(x, 0)) + Int(Extract(y, 0))), 0);
			result = Insert(result, SaturateSigned(Int(Extract(x, 1)) + Int(Extract(y, 1))), 1);
			result = Insert(result, SaturateSigned(Int(Extract(x, 2)) + Int(Extract(y, 2))), 2);
			result = Insert(result, SaturateSigned(Int(Extract(x, 3)) + Int(Extract(y, 3))), 3);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::AddSaturateSigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto paddsw = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			paddsw->addArg(x.value);
			paddsw->addArg(y.value);
			::basicBlock->appendInst(paddsw);

			return RValue<Short4>(V(result));
		}
	}

	RValue<Short4> SubSat(RValue<Short4> x, RValue<Short4> y)
	{
		if(emulateIntrinsics)
		{
			Short4 result;
			result = Insert(result, SaturateSigned(Int(Extract(x, 0)) - Int(Extract(y, 0))), 0);
			result = Insert(result, SaturateSigned(Int(Extract(x, 1)) - Int(Extract(y, 1))), 1);
			result = Insert(result, SaturateSigned(Int(Extract(x, 2)) - Int(Extract(y, 2))), 2);
			result = Insert(result, SaturateSigned(Int(Extract(x, 3)) - Int(Extract(y, 3))), 3);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::SubtractSaturateSigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto psubsw = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			psubsw->addArg(x.value);
			psubsw->addArg(y.value);
			::basicBlock->appendInst(psubsw);

			return RValue<Short4>(V(result));
		}
	}

	RValue<Short4> MulHigh(RValue<Short4> x, RValue<Short4> y)
	{
		if(emulateIntrinsics)
		{
			Short4 result;
			result = Insert(result, Short((Int(Extract(x, 0)) * Int(Extract(y, 0))) >> 16), 0);
			result = Insert(result, Short((Int(Extract(x, 1)) * Int(Extract(y, 1))) >> 16), 1);
			result = Insert(result, Short((Int(Extract(x, 2)) * Int(Extract(y, 2))) >> 16), 2);
			result = Insert(result, Short((Int(Extract(x, 3)) * Int(Extract(y, 3))) >> 16), 3);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::MultiplyHighSigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto pmulhw = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			pmulhw->addArg(x.value);
			pmulhw->addArg(y.value);
			::basicBlock->appendInst(pmulhw);

			return RValue<Short4>(V(result));
		}
	}

	RValue<Int2> MulAdd(RValue<Short4> x, RValue<Short4> y)
	{
		if(emulateIntrinsics)
		{
			Int2 result;
			result = Insert(result, Int(Extract(x, 0)) * Int(Extract(y, 0)) + Int(Extract(x, 1)) * Int(Extract(y, 1)), 0);
			result = Insert(result, Int(Extract(x, 2)) * Int(Extract(y, 2)) + Int(Extract(x, 3)) * Int(Extract(y, 3)), 1);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::MultiplyAddPairs, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto pmaddwd = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			pmaddwd->addArg(x.value);
			pmaddwd->addArg(y.value);
			::basicBlock->appendInst(pmaddwd);

			return As<Int2>(V(result));
		}
	}

	RValue<SByte8> PackSigned(RValue<Short4> x, RValue<Short4> y)
	{
		if(emulateIntrinsics)
		{
			SByte8 result;
			result = Insert(result, SaturateSigned(Extract(x, 0)), 0);
			result = Insert(result, SaturateSigned(Extract(x, 1)), 1);
			result = Insert(result, SaturateSigned(Extract(x, 2)), 2);
			result = Insert(result, SaturateSigned(Extract(x, 3)), 3);
			result = Insert(result, SaturateSigned(Extract(y, 0)), 4);
			result = Insert(result, SaturateSigned(Extract(y, 1)), 5);
			result = Insert(result, SaturateSigned(Extract(y, 2)), 6);
			result = Insert(result, SaturateSigned(Extract(y, 3)), 7);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v16i8);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::VectorPackSigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto pack = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			pack->addArg(x.value);
			pack->addArg(y.value);
			::basicBlock->appendInst(pack);

			return As<SByte8>(Swizzle(As<Int4>(V(result)), 0x88));
		}
	}

	RValue<Byte8> PackUnsigned(RValue<Short4> x, RValue<Short4> y)
	{
		if(emulateIntrinsics)
		{
			Byte8 result;
			result = Insert(result, SaturateUnsigned(Extract(x, 0)), 0);
			result = Insert(result, SaturateUnsigned(Extract(x, 1)), 1);
			result = Insert(result, SaturateUnsigned(Extract(x, 2)), 2);
			result = Insert(result, SaturateUnsigned(Extract(x, 3)), 3);
			result = Insert(result, SaturateUnsigned(Extract(y, 0)), 4);
			result = Insert(result, SaturateUnsigned(Extract(y, 1)), 5);
			result = Insert(result, SaturateUnsigned(Extract(y, 2)), 6);
			result = Insert(result, SaturateUnsigned(Extract(y, 3)), 7);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v16i8);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::VectorPackUnsigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto pack = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			pack->addArg(x.value);
			pack->addArg(y.value);
			::basicBlock->appendInst(pack);

			return As<Byte8>(Swizzle(As<Int4>(V(result)), 0x88));
		}
	}

	RValue<Short4> CmpGT(RValue<Short4> x, RValue<Short4> y)
	{
		return RValue<Short4>(createIntCompare(Ice::InstIcmp::Sgt, x.value, y.value));
	}

	RValue<Short4> CmpEQ(RValue<Short4> x, RValue<Short4> y)
	{
		return RValue<Short4>(Nucleus::createICmpEQ(x.value, y.value));
	}

	Type *Short4::getType()
	{
		return T(Type_v4i16);
	}

	UShort4::UShort4(RValue<Float4> cast, bool saturate)
	{
		if(saturate)
		{
			if(CPUID::SSE4_1)
			{
				// x86 produces 0x80000000 on 32-bit integer overflow/underflow.
				// PackUnsigned takes care of 0x0000 saturation.
				Int4 int4(Min(cast, Float4(0xFFFF)));
				*this = As<UShort4>(PackUnsigned(int4, int4));
			}
			else if(CPUID::ARM)
			{
				// ARM saturates the 32-bit integer result on overflow/undeflow.
				Int4 int4(cast);
				*this = As<UShort4>(PackUnsigned(int4, int4));
			}
			else
			{
				*this = Short4(Int4(Max(Min(cast, Float4(0xFFFF)), Float4(0x0000))));
			}
		}
		else
		{
			*this = Short4(Int4(cast));
		}
	}

	RValue<UShort> Extract(RValue<UShort4> val, int i)
	{
		return RValue<UShort>(Nucleus::createExtractElement(val.value, UShort::getType(), i));
	}

	RValue<UShort4> Insert(RValue<UShort4> val, RValue<UShort> element, int i)
	{
		return RValue<UShort4>(Nucleus::createInsertElement(val.value, element.value, i));
	}

	RValue<UShort4> operator<<(RValue<UShort4> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			UShort4 result;
			result = Insert(result, Extract(lhs, 0) << UShort(rhs), 0);
			result = Insert(result, Extract(lhs, 1) << UShort(rhs), 1);
			result = Insert(result, Extract(lhs, 2) << UShort(rhs), 2);
			result = Insert(result, Extract(lhs, 3) << UShort(rhs), 3);

			return result;
		}
		else
		{
			return RValue<UShort4>(Nucleus::createShl(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<UShort4> operator>>(RValue<UShort4> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			UShort4 result;
			result = Insert(result, Extract(lhs, 0) >> UShort(rhs), 0);
			result = Insert(result, Extract(lhs, 1) >> UShort(rhs), 1);
			result = Insert(result, Extract(lhs, 2) >> UShort(rhs), 2);
			result = Insert(result, Extract(lhs, 3) >> UShort(rhs), 3);

			return result;
		}
		else
		{
			return RValue<UShort4>(Nucleus::createLShr(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<UShort4> Max(RValue<UShort4> x, RValue<UShort4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v8i1);
		auto cmp = Ice::InstIcmp::create(::function, Ice::InstIcmp::Ule, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
		auto select = Ice::InstSelect::create(::function, result, condition, y.value, x.value);
		::basicBlock->appendInst(select);

		return RValue<UShort4>(V(result));
	}

	RValue<UShort4> Min(RValue<UShort4> x, RValue<UShort4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v8i1);
		auto cmp = Ice::InstIcmp::create(::function, Ice::InstIcmp::Ugt, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
		auto select = Ice::InstSelect::create(::function, result, condition, y.value, x.value);
		::basicBlock->appendInst(select);

		return RValue<UShort4>(V(result));
	}

	RValue<UShort> SaturateUnsigned(RValue<Int> x)
	{
		return UShort(IfThenElse(x > 0xFFFF, Int(0xFFFF), IfThenElse(x < 0, Int(0), x)));
	}

	RValue<UShort4> AddSat(RValue<UShort4> x, RValue<UShort4> y)
	{
		if(emulateIntrinsics)
		{
			UShort4 result;
			result = Insert(result, SaturateUnsigned(Int(Extract(x, 0)) + Int(Extract(y, 0))), 0);
			result = Insert(result, SaturateUnsigned(Int(Extract(x, 1)) + Int(Extract(y, 1))), 1);
			result = Insert(result, SaturateUnsigned(Int(Extract(x, 2)) + Int(Extract(y, 2))), 2);
			result = Insert(result, SaturateUnsigned(Int(Extract(x, 3)) + Int(Extract(y, 3))), 3);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::AddSaturateUnsigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto paddusw = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			paddusw->addArg(x.value);
			paddusw->addArg(y.value);
			::basicBlock->appendInst(paddusw);

			return RValue<UShort4>(V(result));
		}
	}

	RValue<UShort4> SubSat(RValue<UShort4> x, RValue<UShort4> y)
	{
		if(emulateIntrinsics)
		{
			UShort4 result;
			result = Insert(result, SaturateUnsigned(Int(Extract(x, 0)) - Int(Extract(y, 0))), 0);
			result = Insert(result, SaturateUnsigned(Int(Extract(x, 1)) - Int(Extract(y, 1))), 1);
			result = Insert(result, SaturateUnsigned(Int(Extract(x, 2)) - Int(Extract(y, 2))), 2);
			result = Insert(result, SaturateUnsigned(Int(Extract(x, 3)) - Int(Extract(y, 3))), 3);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::SubtractSaturateUnsigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto psubusw = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			psubusw->addArg(x.value);
			psubusw->addArg(y.value);
			::basicBlock->appendInst(psubusw);

			return RValue<UShort4>(V(result));
		}
	}

	RValue<UShort4> MulHigh(RValue<UShort4> x, RValue<UShort4> y)
	{
		if(emulateIntrinsics)
		{
			UShort4 result;
			result = Insert(result, UShort((UInt(Extract(x, 0)) * UInt(Extract(y, 0))) >> 16), 0);
			result = Insert(result, UShort((UInt(Extract(x, 1)) * UInt(Extract(y, 1))) >> 16), 1);
			result = Insert(result, UShort((UInt(Extract(x, 2)) * UInt(Extract(y, 2))) >> 16), 2);
			result = Insert(result, UShort((UInt(Extract(x, 3)) * UInt(Extract(y, 3))) >> 16), 3);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::MultiplyHighUnsigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto pmulhuw = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			pmulhuw->addArg(x.value);
			pmulhuw->addArg(y.value);
			::basicBlock->appendInst(pmulhuw);

			return RValue<UShort4>(V(result));
		}
	}

	RValue<Int4> MulHigh(RValue<Int4> x, RValue<Int4> y)
	{
		// TODO: For x86, build an intrinsics version of this which uses shuffles + pmuludq.

		// Scalarized implementation.
		Int4 result;
		result = Insert(result, Int((Long(Extract(x, 0)) * Long(Extract(y, 0))) >> Long(Int(32))), 0);
		result = Insert(result, Int((Long(Extract(x, 1)) * Long(Extract(y, 1))) >> Long(Int(32))), 1);
		result = Insert(result, Int((Long(Extract(x, 2)) * Long(Extract(y, 2))) >> Long(Int(32))), 2);
		result = Insert(result, Int((Long(Extract(x, 3)) * Long(Extract(y, 3))) >> Long(Int(32))), 3);

		return result;
	}

	RValue<UInt4> MulHigh(RValue<UInt4> x, RValue<UInt4> y)
	{
		// TODO: For x86, build an intrinsics version of this which uses shuffles + pmuludq.

		if(false)  // Partial product based implementation.
		{
			auto xh = x >> 16;
			auto yh = y >> 16;
			auto xl = x & UInt4(0x0000FFFF);
			auto yl = y & UInt4(0x0000FFFF);
			auto xlyh = xl * yh;
			auto xhyl = xh * yl;
			auto xlyhh = xlyh >> 16;
			auto xhylh = xhyl >> 16;
			auto xlyhl = xlyh & UInt4(0x0000FFFF);
			auto xhyll = xhyl & UInt4(0x0000FFFF);
			auto xlylh = (xl * yl) >> 16;
			auto oflow = (xlyhl + xhyll + xlylh) >> 16;

			return (xh * yh) + (xlyhh + xhylh) + oflow;
		}

		// Scalarized implementation.
		Int4 result;
		result = Insert(result, Int((Long(UInt(Extract(As<Int4>(x), 0))) * Long(UInt(Extract(As<Int4>(y), 0)))) >> Long(Int(32))), 0);
		result = Insert(result, Int((Long(UInt(Extract(As<Int4>(x), 1))) * Long(UInt(Extract(As<Int4>(y), 1)))) >> Long(Int(32))), 1);
		result = Insert(result, Int((Long(UInt(Extract(As<Int4>(x), 2))) * Long(UInt(Extract(As<Int4>(y), 2)))) >> Long(Int(32))), 2);
		result = Insert(result, Int((Long(UInt(Extract(As<Int4>(x), 3))) * Long(UInt(Extract(As<Int4>(y), 3)))) >> Long(Int(32))), 3);

		return As<UInt4>(result);
	}

	RValue<UShort4> Average(RValue<UShort4> x, RValue<UShort4> y)
	{
		UNIMPLEMENTED("RValue<UShort4> Average(RValue<UShort4> x, RValue<UShort4> y)");
		return UShort4(0);
	}

	Type *UShort4::getType()
	{
		return T(Type_v4i16);
	}

	RValue<Short> Extract(RValue<Short8> val, int i)
	{
		return RValue<Short>(Nucleus::createExtractElement(val.value, Short::getType(), i));
	}

	RValue<Short8> Insert(RValue<Short8> val, RValue<Short> element, int i)
	{
		return RValue<Short8>(Nucleus::createInsertElement(val.value, element.value, i));
	}

	RValue<Short8> operator<<(RValue<Short8> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			Short8 result;
			result = Insert(result, Extract(lhs, 0) << Short(rhs), 0);
			result = Insert(result, Extract(lhs, 1) << Short(rhs), 1);
			result = Insert(result, Extract(lhs, 2) << Short(rhs), 2);
			result = Insert(result, Extract(lhs, 3) << Short(rhs), 3);
			result = Insert(result, Extract(lhs, 4) << Short(rhs), 4);
			result = Insert(result, Extract(lhs, 5) << Short(rhs), 5);
			result = Insert(result, Extract(lhs, 6) << Short(rhs), 6);
			result = Insert(result, Extract(lhs, 7) << Short(rhs), 7);

			return result;
		}
		else
		{
			return RValue<Short8>(Nucleus::createShl(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<Short8> operator>>(RValue<Short8> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			Short8 result;
			result = Insert(result, Extract(lhs, 0) >> Short(rhs), 0);
			result = Insert(result, Extract(lhs, 1) >> Short(rhs), 1);
			result = Insert(result, Extract(lhs, 2) >> Short(rhs), 2);
			result = Insert(result, Extract(lhs, 3) >> Short(rhs), 3);
			result = Insert(result, Extract(lhs, 4) >> Short(rhs), 4);
			result = Insert(result, Extract(lhs, 5) >> Short(rhs), 5);
			result = Insert(result, Extract(lhs, 6) >> Short(rhs), 6);
			result = Insert(result, Extract(lhs, 7) >> Short(rhs), 7);

			return result;
		}
		else
		{
			return RValue<Short8>(Nucleus::createAShr(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<Int4> MulAdd(RValue<Short8> x, RValue<Short8> y)
	{
		UNIMPLEMENTED("RValue<Int4> MulAdd(RValue<Short8> x, RValue<Short8> y)");
		return Int4(0);
	}

	RValue<Short8> MulHigh(RValue<Short8> x, RValue<Short8> y)
	{
		UNIMPLEMENTED("RValue<Short8> MulHigh(RValue<Short8> x, RValue<Short8> y)");
		return Short8(0);
	}

	Type *Short8::getType()
	{
		return T(Ice::IceType_v8i16);
	}

	RValue<UShort> Extract(RValue<UShort8> val, int i)
	{
		return RValue<UShort>(Nucleus::createExtractElement(val.value, UShort::getType(), i));
	}

	RValue<UShort8> Insert(RValue<UShort8> val, RValue<UShort> element, int i)
	{
		return RValue<UShort8>(Nucleus::createInsertElement(val.value, element.value, i));
	}

	RValue<UShort8> operator<<(RValue<UShort8> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			UShort8 result;
			result = Insert(result, Extract(lhs, 0) << UShort(rhs), 0);
			result = Insert(result, Extract(lhs, 1) << UShort(rhs), 1);
			result = Insert(result, Extract(lhs, 2) << UShort(rhs), 2);
			result = Insert(result, Extract(lhs, 3) << UShort(rhs), 3);
			result = Insert(result, Extract(lhs, 4) << UShort(rhs), 4);
			result = Insert(result, Extract(lhs, 5) << UShort(rhs), 5);
			result = Insert(result, Extract(lhs, 6) << UShort(rhs), 6);
			result = Insert(result, Extract(lhs, 7) << UShort(rhs), 7);

			return result;
		}
		else
		{
			return RValue<UShort8>(Nucleus::createShl(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<UShort8> operator>>(RValue<UShort8> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			UShort8 result;
			result = Insert(result, Extract(lhs, 0) >> UShort(rhs), 0);
			result = Insert(result, Extract(lhs, 1) >> UShort(rhs), 1);
			result = Insert(result, Extract(lhs, 2) >> UShort(rhs), 2);
			result = Insert(result, Extract(lhs, 3) >> UShort(rhs), 3);
			result = Insert(result, Extract(lhs, 4) >> UShort(rhs), 4);
			result = Insert(result, Extract(lhs, 5) >> UShort(rhs), 5);
			result = Insert(result, Extract(lhs, 6) >> UShort(rhs), 6);
			result = Insert(result, Extract(lhs, 7) >> UShort(rhs), 7);

			return result;
		}
		else
		{
			return RValue<UShort8>(Nucleus::createLShr(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<UShort8> Swizzle(RValue<UShort8> x, char select0, char select1, char select2, char select3, char select4, char select5, char select6, char select7)
	{
		UNIMPLEMENTED("RValue<UShort8> Swizzle(RValue<UShort8> x, char select0, char select1, char select2, char select3, char select4, char select5, char select6, char select7)");
		return UShort8(0);
	}

	RValue<UShort8> MulHigh(RValue<UShort8> x, RValue<UShort8> y)
	{
		UNIMPLEMENTED("RValue<UShort8> MulHigh(RValue<UShort8> x, RValue<UShort8> y)");
		return UShort8(0);
	}

	// FIXME: Implement as Shuffle(x, y, Select(i0, ..., i16)) and Shuffle(x, y, SELECT_PACK_REPEAT(element))
//	RValue<UShort8> PackRepeat(RValue<Byte16> x, RValue<Byte16> y, int element)
//	{
//		ASSERT(false && "UNIMPLEMENTED"); return RValue<UShort8>(V(nullptr));
//	}

	Type *UShort8::getType()
	{
		return T(Ice::IceType_v8i16);
	}

	RValue<Int> operator++(Int &val, int)   // Post-increment
	{
		RValue<Int> res = val;
		val += 1;
		return res;
	}

	const Int &operator++(Int &val)   // Pre-increment
	{
		val += 1;
		return val;
	}

	RValue<Int> operator--(Int &val, int)   // Post-decrement
	{
		RValue<Int> res = val;
		val -= 1;
		return res;
	}

	const Int &operator--(Int &val)   // Pre-decrement
	{
		val -= 1;
		return val;
	}

	RValue<Int> RoundInt(RValue<Float> cast)
	{
		if(emulateIntrinsics || CPUID::ARM)
		{
			// Push the fractional part off the mantissa. Accurate up to +/-2^22.
			return Int((cast + Float(0x00C00000)) - Float(0x00C00000));
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_i32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::Nearbyint, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto nearbyint = Ice::InstIntrinsicCall::create(::function, 1, result, target, intrinsic);
			nearbyint->addArg(cast.value);
			::basicBlock->appendInst(nearbyint);

			return RValue<Int>(V(result));
		}
	}

	Type *Int::getType()
	{
		return T(Ice::IceType_i32);
	}

	Type *Long::getType()
	{
		return T(Ice::IceType_i64);
	}

	UInt::UInt(RValue<Float> cast)
	{
		// Smallest positive value representable in UInt, but not in Int
		const unsigned int ustart = 0x80000000u;
		const float ustartf = float(ustart);

		// If the value is negative, store 0, otherwise store the result of the conversion
		storeValue((~(As<Int>(cast) >> 31) &
		// Check if the value can be represented as an Int
			IfThenElse(cast >= ustartf,
		// If the value is too large, subtract ustart and re-add it after conversion.
				As<Int>(As<UInt>(Int(cast - Float(ustartf))) + UInt(ustart)),
		// Otherwise, just convert normally
				Int(cast))).value);
	}

	RValue<UInt> operator++(UInt &val, int)   // Post-increment
	{
		RValue<UInt> res = val;
		val += 1;
		return res;
	}

	const UInt &operator++(UInt &val)   // Pre-increment
	{
		val += 1;
		return val;
	}

	RValue<UInt> operator--(UInt &val, int)   // Post-decrement
	{
		RValue<UInt> res = val;
		val -= 1;
		return res;
	}

	const UInt &operator--(UInt &val)   // Pre-decrement
	{
		val -= 1;
		return val;
	}

//	RValue<UInt> RoundUInt(RValue<Float> cast)
//	{
//		ASSERT(false && "UNIMPLEMENTED"); return RValue<UInt>(V(nullptr));
//	}

	Type *UInt::getType()
	{
		return T(Ice::IceType_i32);
	}

//	Int2::Int2(RValue<Int> cast)
//	{
//		Value *extend = Nucleus::createZExt(cast.value, Long::getType());
//		Value *vector = Nucleus::createBitCast(extend, Int2::getType());
//
//		Constant *shuffle[2];
//		shuffle[0] = Nucleus::createConstantInt(0);
//		shuffle[1] = Nucleus::createConstantInt(0);
//
//		Value *replicate = Nucleus::createShuffleVector(vector, UndefValue::get(Int2::getType()), Nucleus::createConstantVector(shuffle, 2));
//
//		storeValue(replicate);
//	}

	RValue<Int2> operator<<(RValue<Int2> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			Int2 result;
			result = Insert(result, Extract(lhs, 0) << Int(rhs), 0);
			result = Insert(result, Extract(lhs, 1) << Int(rhs), 1);

			return result;
		}
		else
		{
			return RValue<Int2>(Nucleus::createShl(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<Int2> operator>>(RValue<Int2> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			Int2 result;
			result = Insert(result, Extract(lhs, 0) >> Int(rhs), 0);
			result = Insert(result, Extract(lhs, 1) >> Int(rhs), 1);

			return result;
		}
		else
		{
			return RValue<Int2>(Nucleus::createAShr(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	Type *Int2::getType()
	{
		return T(Type_v2i32);
	}

	RValue<UInt2> operator<<(RValue<UInt2> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			UInt2 result;
			result = Insert(result, Extract(lhs, 0) << UInt(rhs), 0);
			result = Insert(result, Extract(lhs, 1) << UInt(rhs), 1);

			return result;
		}
		else
		{
			return RValue<UInt2>(Nucleus::createShl(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<UInt2> operator>>(RValue<UInt2> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			UInt2 result;
			result = Insert(result, Extract(lhs, 0) >> UInt(rhs), 0);
			result = Insert(result, Extract(lhs, 1) >> UInt(rhs), 1);

			return result;
		}
		else
		{
			return RValue<UInt2>(Nucleus::createLShr(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	Type *UInt2::getType()
	{
		return T(Type_v2i32);
	}

	Int4::Int4(RValue<Byte4> cast) : XYZW(this)
	{
		Value *x = Nucleus::createBitCast(cast.value, Int::getType());
		Value *a = Nucleus::createInsertElement(loadValue(), x, 0);

		Value *e;
		int swizzle[16] = {0, 16, 1, 17, 2, 18, 3, 19, 4, 20, 5, 21, 6, 22, 7, 23};
		Value *b = Nucleus::createBitCast(a, Byte16::getType());
		Value *c = Nucleus::createShuffleVector(b, V(Nucleus::createNullValue(Byte16::getType())), swizzle);

		int swizzle2[8] = {0, 8, 1, 9, 2, 10, 3, 11};
		Value *d = Nucleus::createBitCast(c, Short8::getType());
		e = Nucleus::createShuffleVector(d, V(Nucleus::createNullValue(Short8::getType())), swizzle2);

		Value *f = Nucleus::createBitCast(e, Int4::getType());
		storeValue(f);
	}

	Int4::Int4(RValue<SByte4> cast) : XYZW(this)
	{
		Value *x = Nucleus::createBitCast(cast.value, Int::getType());
		Value *a = Nucleus::createInsertElement(loadValue(), x, 0);

		int swizzle[16] = {0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7};
		Value *b = Nucleus::createBitCast(a, Byte16::getType());
		Value *c = Nucleus::createShuffleVector(b, b, swizzle);

		int swizzle2[8] = {0, 0, 1, 1, 2, 2, 3, 3};
		Value *d = Nucleus::createBitCast(c, Short8::getType());
		Value *e = Nucleus::createShuffleVector(d, d, swizzle2);

		*this = As<Int4>(e) >> 24;
	}

	Int4::Int4(RValue<Short4> cast) : XYZW(this)
	{
		int swizzle[8] = {0, 0, 1, 1, 2, 2, 3, 3};
		Value *c = Nucleus::createShuffleVector(cast.value, cast.value, swizzle);

		*this = As<Int4>(c) >> 16;
	}

	Int4::Int4(RValue<UShort4> cast) : XYZW(this)
	{
		int swizzle[8] = {0, 8, 1, 9, 2, 10, 3, 11};
		Value *c = Nucleus::createShuffleVector(cast.value, Short8(0, 0, 0, 0, 0, 0, 0, 0).loadValue(), swizzle);
		Value *d = Nucleus::createBitCast(c, Int4::getType());
		storeValue(d);
	}

	Int4::Int4(RValue<Int> rhs) : XYZW(this)
	{
		Value *vector = Nucleus::createBitCast(rhs.value, Int4::getType());

		int swizzle[4] = {0, 0, 0, 0};
		Value *replicate = Nucleus::createShuffleVector(vector, vector, swizzle);

		storeValue(replicate);
	}

	RValue<Int4> operator<<(RValue<Int4> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			Int4 result;
			result = Insert(result, Extract(lhs, 0) << Int(rhs), 0);
			result = Insert(result, Extract(lhs, 1) << Int(rhs), 1);
			result = Insert(result, Extract(lhs, 2) << Int(rhs), 2);
			result = Insert(result, Extract(lhs, 3) << Int(rhs), 3);

			return result;
		}
		else
		{
			return RValue<Int4>(Nucleus::createShl(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<Int4> operator>>(RValue<Int4> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			Int4 result;
			result = Insert(result, Extract(lhs, 0) >> Int(rhs), 0);
			result = Insert(result, Extract(lhs, 1) >> Int(rhs), 1);
			result = Insert(result, Extract(lhs, 2) >> Int(rhs), 2);
			result = Insert(result, Extract(lhs, 3) >> Int(rhs), 3);

			return result;
		}
		else
		{
			return RValue<Int4>(Nucleus::createAShr(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<Int4> CmpEQ(RValue<Int4> x, RValue<Int4> y)
	{
		return RValue<Int4>(Nucleus::createICmpEQ(x.value, y.value));
	}

	RValue<Int4> CmpLT(RValue<Int4> x, RValue<Int4> y)
	{
		return RValue<Int4>(Nucleus::createICmpSLT(x.value, y.value));
	}

	RValue<Int4> CmpLE(RValue<Int4> x, RValue<Int4> y)
	{
		return RValue<Int4>(Nucleus::createICmpSLE(x.value, y.value));
	}

	RValue<Int4> CmpNEQ(RValue<Int4> x, RValue<Int4> y)
	{
		return RValue<Int4>(Nucleus::createICmpNE(x.value, y.value));
	}

	RValue<Int4> CmpNLT(RValue<Int4> x, RValue<Int4> y)
	{
		return RValue<Int4>(Nucleus::createICmpSGE(x.value, y.value));
	}

	RValue<Int4> CmpNLE(RValue<Int4> x, RValue<Int4> y)
	{
		return RValue<Int4>(Nucleus::createICmpSGT(x.value, y.value));
	}

	RValue<Int4> Max(RValue<Int4> x, RValue<Int4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v4i1);
		auto cmp = Ice::InstIcmp::create(::function, Ice::InstIcmp::Sle, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4i32);
		auto select = Ice::InstSelect::create(::function, result, condition, y.value, x.value);
		::basicBlock->appendInst(select);

		return RValue<Int4>(V(result));
	}

	RValue<Int4> Min(RValue<Int4> x, RValue<Int4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v4i1);
		auto cmp = Ice::InstIcmp::create(::function, Ice::InstIcmp::Sgt, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4i32);
		auto select = Ice::InstSelect::create(::function, result, condition, y.value, x.value);
		::basicBlock->appendInst(select);

		return RValue<Int4>(V(result));
	}

	RValue<Int4> RoundInt(RValue<Float4> cast)
	{
		if(emulateIntrinsics || CPUID::ARM)
		{
			// Push the fractional part off the mantissa. Accurate up to +/-2^22.
			return Int4((cast + Float4(0x00C00000)) - Float4(0x00C00000));
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4i32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::Nearbyint, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto nearbyint = Ice::InstIntrinsicCall::create(::function, 1, result, target, intrinsic);
			nearbyint->addArg(cast.value);
			::basicBlock->appendInst(nearbyint);

			return RValue<Int4>(V(result));
		}
	}

	RValue<Short8> PackSigned(RValue<Int4> x, RValue<Int4> y)
	{
		if(emulateIntrinsics)
		{
			Short8 result;
			result = Insert(result, SaturateSigned(Extract(x, 0)), 0);
			result = Insert(result, SaturateSigned(Extract(x, 1)), 1);
			result = Insert(result, SaturateSigned(Extract(x, 2)), 2);
			result = Insert(result, SaturateSigned(Extract(x, 3)), 3);
			result = Insert(result, SaturateSigned(Extract(y, 0)), 4);
			result = Insert(result, SaturateSigned(Extract(y, 1)), 5);
			result = Insert(result, SaturateSigned(Extract(y, 2)), 6);
			result = Insert(result, SaturateSigned(Extract(y, 3)), 7);

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::VectorPackSigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto pack = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			pack->addArg(x.value);
			pack->addArg(y.value);
			::basicBlock->appendInst(pack);

			return RValue<Short8>(V(result));
		}
	}

	RValue<UShort8> PackUnsigned(RValue<Int4> x, RValue<Int4> y)
	{
		if(emulateIntrinsics || !(CPUID::SSE4_1 || CPUID::ARM))
		{
			RValue<Int4> sx = As<Int4>(x);
			RValue<Int4> bx = (sx & ~(sx >> 31)) - Int4(0x8000);

			RValue<Int4> sy = As<Int4>(y);
			RValue<Int4> by = (sy & ~(sy >> 31)) - Int4(0x8000);

			return As<UShort8>(PackSigned(bx, by) + Short8(0x8000u));
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v8i16);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::VectorPackUnsigned, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto pack = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			pack->addArg(x.value);
			pack->addArg(y.value);
			::basicBlock->appendInst(pack);

			return RValue<UShort8>(V(result));
		}
	}

	RValue<Int> SignMask(RValue<Int4> x)
	{
		if(emulateIntrinsics || CPUID::ARM)
		{
			Int4 xx = (x >> 31) & Int4(0x00000001, 0x00000002, 0x00000004, 0x00000008);
			return Extract(xx, 0) | Extract(xx, 1) | Extract(xx, 2) | Extract(xx, 3);
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_i32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::SignMask, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto movmsk = Ice::InstIntrinsicCall::create(::function, 1, result, target, intrinsic);
			movmsk->addArg(x.value);
			::basicBlock->appendInst(movmsk);

			return RValue<Int>(V(result));
		}
	}

	Type *Int4::getType()
	{
		return T(Ice::IceType_v4i32);
	}

	UInt4::UInt4(RValue<Float4> cast) : XYZW(this)
	{
		// Smallest positive value representable in UInt, but not in Int
		const unsigned int ustart = 0x80000000u;
		const float ustartf = float(ustart);

		// Check if the value can be represented as an Int
		Int4 uiValue = CmpNLT(cast, Float4(ustartf));
		// If the value is too large, subtract ustart and re-add it after conversion.
		uiValue = (uiValue & As<Int4>(As<UInt4>(Int4(cast - Float4(ustartf))) + UInt4(ustart))) |
		// Otherwise, just convert normally
		          (~uiValue & Int4(cast));
		// If the value is negative, store 0, otherwise store the result of the conversion
		storeValue((~(As<Int4>(cast) >> 31) & uiValue).value);
	}

	UInt4::UInt4(RValue<UInt> rhs) : XYZW(this)
	{
		Value *vector = Nucleus::createBitCast(rhs.value, UInt4::getType());

		int swizzle[4] = {0, 0, 0, 0};
		Value *replicate = Nucleus::createShuffleVector(vector, vector, swizzle);

		storeValue(replicate);
	}

	RValue<UInt4> operator<<(RValue<UInt4> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			UInt4 result;
			result = Insert(result, Extract(lhs, 0) << UInt(rhs), 0);
			result = Insert(result, Extract(lhs, 1) << UInt(rhs), 1);
			result = Insert(result, Extract(lhs, 2) << UInt(rhs), 2);
			result = Insert(result, Extract(lhs, 3) << UInt(rhs), 3);

			return result;
		}
		else
		{
			return RValue<UInt4>(Nucleus::createShl(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<UInt4> operator>>(RValue<UInt4> lhs, unsigned char rhs)
	{
		if(emulateIntrinsics)
		{
			UInt4 result;
			result = Insert(result, Extract(lhs, 0) >> UInt(rhs), 0);
			result = Insert(result, Extract(lhs, 1) >> UInt(rhs), 1);
			result = Insert(result, Extract(lhs, 2) >> UInt(rhs), 2);
			result = Insert(result, Extract(lhs, 3) >> UInt(rhs), 3);

			return result;
		}
		else
		{
			return RValue<UInt4>(Nucleus::createLShr(lhs.value, V(::context->getConstantInt32(rhs))));
		}
	}

	RValue<UInt4> CmpEQ(RValue<UInt4> x, RValue<UInt4> y)
	{
		return RValue<UInt4>(Nucleus::createICmpEQ(x.value, y.value));
	}

	RValue<UInt4> CmpLT(RValue<UInt4> x, RValue<UInt4> y)
	{
		return RValue<UInt4>(Nucleus::createICmpULT(x.value, y.value));
	}

	RValue<UInt4> CmpLE(RValue<UInt4> x, RValue<UInt4> y)
	{
		return RValue<UInt4>(Nucleus::createICmpULE(x.value, y.value));
	}

	RValue<UInt4> CmpNEQ(RValue<UInt4> x, RValue<UInt4> y)
	{
		return RValue<UInt4>(Nucleus::createICmpNE(x.value, y.value));
	}

	RValue<UInt4> CmpNLT(RValue<UInt4> x, RValue<UInt4> y)
	{
		return RValue<UInt4>(Nucleus::createICmpUGE(x.value, y.value));
	}

	RValue<UInt4> CmpNLE(RValue<UInt4> x, RValue<UInt4> y)
	{
		return RValue<UInt4>(Nucleus::createICmpUGT(x.value, y.value));
	}

	RValue<UInt4> Max(RValue<UInt4> x, RValue<UInt4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v4i1);
		auto cmp = Ice::InstIcmp::create(::function, Ice::InstIcmp::Ule, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4i32);
		auto select = Ice::InstSelect::create(::function, result, condition, y.value, x.value);
		::basicBlock->appendInst(select);

		return RValue<UInt4>(V(result));
	}

	RValue<UInt4> Min(RValue<UInt4> x, RValue<UInt4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v4i1);
		auto cmp = Ice::InstIcmp::create(::function, Ice::InstIcmp::Ugt, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4i32);
		auto select = Ice::InstSelect::create(::function, result, condition, y.value, x.value);
		::basicBlock->appendInst(select);

		return RValue<UInt4>(V(result));
	}

	Type *UInt4::getType()
	{
		return T(Ice::IceType_v4i32);
	}

	Type *Half::getType()
	{
		return T(Ice::IceType_i16);
	}

	RValue<Float> Rcp_pp(RValue<Float> x, bool exactAtPow2)
	{
		return 1.0f / x;
	}

	RValue<Float> RcpSqrt_pp(RValue<Float> x)
	{
		return Rcp_pp(Sqrt(x));
	}

	RValue<Float> Sqrt(RValue<Float> x)
	{
		Ice::Variable *result = ::function->makeVariable(Ice::IceType_f32);
		const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::Sqrt, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
		auto target = ::context->getConstantUndef(Ice::IceType_i32);
		auto sqrt = Ice::InstIntrinsicCall::create(::function, 1, result, target, intrinsic);
		sqrt->addArg(x.value);
		::basicBlock->appendInst(sqrt);

		return RValue<Float>(V(result));
	}

	RValue<Float> Round(RValue<Float> x)
	{
		return Float4(Round(Float4(x))).x;
	}

	RValue<Float> Trunc(RValue<Float> x)
	{
		return Float4(Trunc(Float4(x))).x;
	}

	RValue<Float> Frac(RValue<Float> x)
	{
		return Float4(Frac(Float4(x))).x;
	}

	RValue<Float> Floor(RValue<Float> x)
	{
		return Float4(Floor(Float4(x))).x;
	}

	RValue<Float> Ceil(RValue<Float> x)
	{
		return Float4(Ceil(Float4(x))).x;
	}

	Type *Float::getType()
	{
		return T(Ice::IceType_f32);
	}

	Type *Float2::getType()
	{
		return T(Type_v2f32);
	}

	Float4::Float4(RValue<Float> rhs) : XYZW(this)
	{
		Value *vector = Nucleus::createBitCast(rhs.value, Float4::getType());

		int swizzle[4] = {0, 0, 0, 0};
		Value *replicate = Nucleus::createShuffleVector(vector, vector, swizzle);

		storeValue(replicate);
	}

	RValue<Float4> Max(RValue<Float4> x, RValue<Float4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v4i1);
		auto cmp = Ice::InstFcmp::create(::function, Ice::InstFcmp::Ogt, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4f32);
		auto select = Ice::InstSelect::create(::function, result, condition, x.value, y.value);
		::basicBlock->appendInst(select);

		return RValue<Float4>(V(result));
	}

	RValue<Float4> Min(RValue<Float4> x, RValue<Float4> y)
	{
		Ice::Variable *condition = ::function->makeVariable(Ice::IceType_v4i1);
		auto cmp = Ice::InstFcmp::create(::function, Ice::InstFcmp::Olt, condition, x.value, y.value);
		::basicBlock->appendInst(cmp);

		Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4f32);
		auto select = Ice::InstSelect::create(::function, result, condition, x.value, y.value);
		::basicBlock->appendInst(select);

		return RValue<Float4>(V(result));
	}

	RValue<Float4> Rcp_pp(RValue<Float4> x, bool exactAtPow2)
	{
		return Float4(1.0f) / x;
	}

	RValue<Float4> RcpSqrt_pp(RValue<Float4> x)
	{
		return Rcp_pp(Sqrt(x));
	}

	RValue<Float4> Sqrt(RValue<Float4> x)
	{
		if(emulateIntrinsics || CPUID::ARM)
		{
			Float4 result;
			result.x = Sqrt(Float(Float4(x).x));
			result.y = Sqrt(Float(Float4(x).y));
			result.z = Sqrt(Float(Float4(x).z));
			result.w = Sqrt(Float(Float4(x).w));

			return result;
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4f32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::Sqrt, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto sqrt = Ice::InstIntrinsicCall::create(::function, 1, result, target, intrinsic);
			sqrt->addArg(x.value);
			::basicBlock->appendInst(sqrt);

			return RValue<Float4>(V(result));
		}
	}

	RValue<Int> SignMask(RValue<Float4> x)
	{
		if(emulateIntrinsics || CPUID::ARM)
		{
			Int4 xx = (As<Int4>(x) >> 31) & Int4(0x00000001, 0x00000002, 0x00000004, 0x00000008);
			return Extract(xx, 0) | Extract(xx, 1) | Extract(xx, 2) | Extract(xx, 3);
		}
		else
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_i32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::SignMask, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto movmsk = Ice::InstIntrinsicCall::create(::function, 1, result, target, intrinsic);
			movmsk->addArg(x.value);
			::basicBlock->appendInst(movmsk);

			return RValue<Int>(V(result));
		}
	}

	RValue<Int4> CmpEQ(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpOEQ(x.value, y.value));
	}

	RValue<Int4> CmpLT(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpOLT(x.value, y.value));
	}

	RValue<Int4> CmpLE(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpOLE(x.value, y.value));
	}

	RValue<Int4> CmpNEQ(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpONE(x.value, y.value));
	}

	RValue<Int4> CmpNLT(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpOGE(x.value, y.value));
	}

	RValue<Int4> CmpNLE(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpOGT(x.value, y.value));
	}

	RValue<Int4> CmpUEQ(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpUEQ(x.value, y.value));
	}

	RValue<Int4> CmpULT(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpULT(x.value, y.value));
	}

	RValue<Int4> CmpULE(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpULE(x.value, y.value));
	}

	RValue<Int4> CmpUNEQ(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpUNE(x.value, y.value));
	}

	RValue<Int4> CmpUNLT(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpUGE(x.value, y.value));
	}

	RValue<Int4> CmpUNLE(RValue<Float4> x, RValue<Float4> y)
	{
		return RValue<Int4>(Nucleus::createFCmpUGT(x.value, y.value));
	}

	RValue<Float4> Round(RValue<Float4> x)
	{
		if(emulateIntrinsics || CPUID::ARM)
		{
			// Push the fractional part off the mantissa. Accurate up to +/-2^22.
			return (x + Float4(0x00C00000)) - Float4(0x00C00000);
		}
		else if(CPUID::SSE4_1)
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4f32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::Round, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto round = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			round->addArg(x.value);
			round->addArg(::context->getConstantInt32(0));
			::basicBlock->appendInst(round);

			return RValue<Float4>(V(result));
		}
		else
		{
			return Float4(RoundInt(x));
		}
	}

	RValue<Float4> Trunc(RValue<Float4> x)
	{
		if(CPUID::SSE4_1)
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4f32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::Round, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto round = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			round->addArg(x.value);
			round->addArg(::context->getConstantInt32(3));
			::basicBlock->appendInst(round);

			return RValue<Float4>(V(result));
		}
		else
		{
			return Float4(Int4(x));
		}
	}

	RValue<Float4> Frac(RValue<Float4> x)
	{
		Float4 frc;

		if(CPUID::SSE4_1)
		{
			frc = x - Floor(x);
		}
		else
		{
			frc = x - Float4(Int4(x));   // Signed fractional part.

			frc += As<Float4>(As<Int4>(CmpNLE(Float4(0.0f), frc)) & As<Int4>(Float4(1, 1, 1, 1)));   // Add 1.0 if negative.
		}

		// x - floor(x) can be 1.0 for very small negative x.
		// Clamp against the value just below 1.0.
		return Min(frc, As<Float4>(Int4(0x3F7FFFFF)));
	}

	RValue<Float4> Floor(RValue<Float4> x)
	{
		if(CPUID::SSE4_1)
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4f32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::Round, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto round = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			round->addArg(x.value);
			round->addArg(::context->getConstantInt32(1));
			::basicBlock->appendInst(round);

			return RValue<Float4>(V(result));
		}
		else
		{
			return x - Frac(x);
		}
	}

	RValue<Float4> Ceil(RValue<Float4> x)
	{
		if(CPUID::SSE4_1)
		{
			Ice::Variable *result = ::function->makeVariable(Ice::IceType_v4f32);
			const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::Round, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
			auto target = ::context->getConstantUndef(Ice::IceType_i32);
			auto round = Ice::InstIntrinsicCall::create(::function, 2, result, target, intrinsic);
			round->addArg(x.value);
			round->addArg(::context->getConstantInt32(2));
			::basicBlock->appendInst(round);

			return RValue<Float4>(V(result));
		}
		else
		{
			return -Floor(-x);
		}
	}

	Type *Float4::getType()
	{
		return T(Ice::IceType_v4f32);
	}

	RValue<Long> Ticks()
	{
		UNIMPLEMENTED("RValue<Long> Ticks()");
		return Long(Int(0));
	}

	RValue<Pointer<Byte>> ConstantPointer(void const * ptr)
	{
		if (sizeof(void*) == 8)
		{
			return RValue<Pointer<Byte>>(V(::context->getConstantInt64(reinterpret_cast<intptr_t>(ptr))));
		}
		else
		{
			return RValue<Pointer<Byte>>(V(::context->getConstantInt32(reinterpret_cast<intptr_t>(ptr))));
		}
	}

	RValue<Pointer<Byte>> ConstantData(void const * data, size_t size)
	{
		// TODO: Try to use Ice::VariableDeclaration::DataInitializer and
		// getConstantSym instead of tagging data on the routine.
		return ConstantPointer(::routine->addConstantData(data, size));
	}

	Value* Call(RValue<Pointer<Byte>> fptr, Type* retTy, std::initializer_list<Value*> args, std::initializer_list<Type*> argTys)
	{
		// FIXME: This does not currently work on Windows.
		Ice::Variable *ret = nullptr;
		if (retTy != nullptr)
		{
			ret = ::function->makeVariable(T(retTy));
		}
		auto call = Ice::InstCall::create(::function, args.size(), ret, V(fptr.value), false);
		for (auto arg : args)
		{
			call->addArg(V(arg));
		}
		::basicBlock->appendInst(call);
		return V(ret);
	}

	void Breakpoint()
	{
		const Ice::Intrinsics::IntrinsicInfo intrinsic = {Ice::Intrinsics::Trap, Ice::Intrinsics::SideEffects_F, Ice::Intrinsics::ReturnsTwice_F, Ice::Intrinsics::MemoryWrite_F};
		auto target = ::context->getConstantUndef(Ice::IceType_i32);
		auto trap = Ice::InstIntrinsicCall::create(::function, 0, nullptr, target, intrinsic);
		::basicBlock->appendInst(trap);
	}

	// Below are functions currently unimplemented for the Subzero backend.
	// They are stubbed to satisfy the linker.
	void Nucleus::createFence(std::memory_order memoryOrder) { UNIMPLEMENTED("Subzero createFence()"); }
	Value *Nucleus::createMaskedLoad(Value *ptr, Type *elTy, Value *mask, unsigned int alignment, bool zeroMaskedLanes) { UNIMPLEMENTED("Subzero createMaskedLoad()"); return nullptr; }
	void Nucleus::createMaskedStore(Value *ptr, Value *val, Value *mask, unsigned int alignment) { UNIMPLEMENTED("Subzero createMaskedStore()"); }
	Value *Nucleus::createGather(Value *base, Type *elTy, Value *offsets, Value *mask, unsigned int alignment, bool zeroMaskedLanes) { UNIMPLEMENTED("Subzero createGather()"); return nullptr; }
	void Nucleus::createScatter(Value *base, Value *val, Value *offsets, Value *mask, unsigned int alignment) { UNIMPLEMENTED("Subzero createScatter()"); }
	RValue<Float> Exp2(RValue<Float> x) { UNIMPLEMENTED("Subzero Exp2()"); return Float(0); }
	RValue<Float> Log2(RValue<Float> x) { UNIMPLEMENTED("Subzero Log2()"); return Float(0); }
	RValue<Float4> Sin(RValue<Float4> x) { UNIMPLEMENTED("Subzero Sin()"); return Float4(0); }
	RValue<Float4> Cos(RValue<Float4> x) { UNIMPLEMENTED("Subzero Cos()"); return Float4(0); }
	RValue<Float4> Tan(RValue<Float4> x) { UNIMPLEMENTED("Subzero Tan()"); return Float4(0); }
	RValue<Float4> Asin(RValue<Float4> x) { UNIMPLEMENTED("Subzero Asin()"); return Float4(0); }
	RValue<Float4> Acos(RValue<Float4> x) { UNIMPLEMENTED("Subzero Acos()"); return Float4(0); }
	RValue<Float4> Atan(RValue<Float4> x) { UNIMPLEMENTED("Subzero Atan()"); return Float4(0); }
	RValue<Float4> Sinh(RValue<Float4> x) { UNIMPLEMENTED("Subzero Sinh()"); return Float4(0); }
	RValue<Float4> Cosh(RValue<Float4> x) { UNIMPLEMENTED("Subzero Cosh()"); return Float4(0); }
	RValue<Float4> Tanh(RValue<Float4> x) { UNIMPLEMENTED("Subzero Tanh()"); return Float4(0); }
	RValue<Float4> Asinh(RValue<Float4> x) { UNIMPLEMENTED("Subzero Asinh()"); return Float4(0); }
	RValue<Float4> Acosh(RValue<Float4> x) { UNIMPLEMENTED("Subzero Acosh()"); return Float4(0); }
	RValue<Float4> Atanh(RValue<Float4> x) { UNIMPLEMENTED("Subzero Atanh()"); return Float4(0); }
	RValue<Float4> Atan2(RValue<Float4> x, RValue<Float4> y) { UNIMPLEMENTED("Subzero Atan2()"); return Float4(0); }
	RValue<Float4> Pow(RValue<Float4> x, RValue<Float4> y) { UNIMPLEMENTED("Subzero Pow()"); return Float4(0); }
	RValue<Float4> Exp(RValue<Float4> x) { UNIMPLEMENTED("Subzero Exp()"); return Float4(0); }
	RValue<Float4> Log(RValue<Float4> x) { UNIMPLEMENTED("Subzero Log()"); return Float4(0); }
	RValue<Float4> Exp2(RValue<Float4> x) { UNIMPLEMENTED("Subzero Exp2()"); return Float4(0); }
	RValue<Float4> Log2(RValue<Float4> x) { UNIMPLEMENTED("Subzero Log2()"); return Float4(0); }
	RValue<UInt> Ctlz(RValue<UInt> x, bool isZeroUndef) { UNIMPLEMENTED("Subzero Ctlz()"); return UInt(0); }
	RValue<UInt4> Ctlz(RValue<UInt4> x, bool isZeroUndef) { UNIMPLEMENTED("Subzero Ctlz()"); return UInt4(0); }
	RValue<UInt> Cttz(RValue<UInt> x, bool isZeroUndef) { UNIMPLEMENTED("Subzero Cttz()"); return UInt(0); }
	RValue<UInt4> Cttz(RValue<UInt4> x, bool isZeroUndef) { UNIMPLEMENTED("Subzero Cttz()"); return UInt4(0); }

	void EmitDebugLocation() {}
	void EmitDebugVariable(Value* value) {}
	void FlushDebug() {}

	void Nucleus::createCoroutine(Type *YieldType, std::vector<Type*> &Params) { UNIMPLEMENTED("createCoroutine"); }
	std::shared_ptr<Routine> Nucleus::acquireCoroutine(const char *name, const Config::Edit &cfgEdit /* = Config::Edit::None */) { UNIMPLEMENTED("acquireCoroutine"); return nullptr; }
	void Nucleus::yield(Value* val) { UNIMPLEMENTED("Yield"); }

}