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testmasm.cpp
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6340 lines (5380 loc) · 223 KB
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/*
* Copyright (C) 2017-2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "CCallHelpers.h"
#include "CPU.h"
#include "FPRInfo.h"
#include "GPRInfo.h"
#include "InitializeThreading.h"
#include "LinkBuffer.h"
#include "ProbeContext.h"
#include "RegisterTZoneTypes.h"
#include "StackAlignment.h"
#include <limits>
#include <wtf/Compiler.h>
#include <wtf/DataLog.h>
#include <wtf/Function.h>
#include <wtf/Lock.h>
#include <wtf/NumberOfCores.h>
#include <wtf/PtrTag.h>
#include <wtf/TZoneMallocInitialization.h>
#include <wtf/Threading.h>
#include <wtf/WTFProcess.h>
#include <wtf/text/StringCommon.h>
// We don't have a NO_RETURN_DUE_TO_EXIT, nor should we. That's ridiculous.
static bool hiddenTruthBecauseNoReturnIsStupid() { return true; }
static void usage()
{
dataLog("Usage: testmasm [<filter>]\n");
if (hiddenTruthBecauseNoReturnIsStupid())
exitProcess(1);
}
#if ENABLE(JIT)
static Vector<double> doubleOperands()
{
return Vector<double> {
0,
-0,
1,
-1,
42,
-42,
std::numeric_limits<double>::max(),
std::numeric_limits<double>::min(),
std::numeric_limits<double>::lowest(),
std::numeric_limits<double>::quiet_NaN(),
std::numeric_limits<double>::infinity(),
-std::numeric_limits<double>::infinity(),
};
}
#if CPU(X86) || CPU(X86_64) || CPU(ARM64) || CPU(RISCV64)
static Vector<float> floatOperands()
{
return Vector<float> {
0,
-0,
1,
-1,
42,
-42,
std::numeric_limits<float>::max(),
std::numeric_limits<float>::min(),
std::numeric_limits<float>::lowest(),
std::numeric_limits<float>::quiet_NaN(),
std::numeric_limits<float>::infinity(),
-std::numeric_limits<float>::infinity(),
};
}
#endif
static Vector<int32_t> int32Operands()
{
return Vector<int32_t> {
0,
1,
-1,
2,
-2,
42,
-42,
64,
std::numeric_limits<int32_t>::max(),
std::numeric_limits<int32_t>::min(),
};
}
static UNUSED_FUNCTION Vector<int16_t> int16Operands()
{
return Vector<int16_t> {
0,
1,
-1,
42,
-42,
std::numeric_limits<int16_t>::max(),
std::numeric_limits<int16_t>::min(),
static_cast<int16_t>(std::numeric_limits<uint16_t>::max()),
static_cast<int16_t>(std::numeric_limits<uint16_t>::min())
};
}
static UNUSED_FUNCTION Vector<int8_t> int8Operands()
{
return Vector<int8_t> {
0,
1,
-1,
42,
-42,
std::numeric_limits<int8_t>::max(),
std::numeric_limits<int8_t>::min(),
static_cast<int8_t>(std::numeric_limits<uint8_t>::max()),
static_cast<int8_t>(std::numeric_limits<uint8_t>::min())
};
}
#if CPU(X86_64) || CPU(ARM64)
static Vector<int64_t> int64Operands()
{
return Vector<int64_t> {
0,
1,
-1,
2,
-2,
42,
-42,
64,
std::numeric_limits<int32_t>::max(),
std::numeric_limits<int32_t>::min(),
std::numeric_limits<int64_t>::max(),
std::numeric_limits<int64_t>::min(),
};
}
#endif
namespace WTF {
static void printInternal(PrintStream& out, void* value)
{
out.printf("%p", value);
}
} // namespace WTF
namespace JSC {
namespace Probe {
JS_EXPORT_PRIVATE void* probeStateForContext(Probe::Context&);
} // namespace Probe
} // namespace JSC
using namespace JSC;
namespace {
using CPUState = Probe::CPUState;
Lock crashLock;
typedef WTF::Function<void(CCallHelpers&)> Generator;
template<typename T> T nextID(T id) { return static_cast<T>(id + 1); }
#define TESTWORD64 0x0c0defefebeef000
#define TESTWORD32 0x0beef000
#define testWord32(x) (TESTWORD32 + static_cast<uint32_t>(x))
#define testWord64(x) (TESTWORD64 + static_cast<uint64_t>(x))
#if USE(JSVALUE64)
#define testWord(x) testWord64(x)
#else
#define testWord(x) testWord32(x)
#endif
// Nothing fancy for now; we just use the existing WTF assertion machinery.
#define CHECK_EQ(_actual, _expected) do { \
if ((_actual) == (_expected)) \
break; \
crashLock.lock(); \
dataLog("FAILED while testing " #_actual ": expected: ", _expected, ", actual: ", _actual, "\n"); \
WTFReportAssertionFailure(__FILE__, __LINE__, WTF_PRETTY_FUNCTION, "CHECK_EQ("#_actual ", " #_expected ")"); \
CRASH(); \
} while (false)
#define CHECK_NOT_EQ(_actual, _expected) do { \
if ((_actual) != (_expected)) \
break; \
crashLock.lock(); \
dataLog("FAILED while testing " #_actual ": expected not: ", _expected, ", actual: ", _actual, "\n"); \
WTFReportAssertionFailure(__FILE__, __LINE__, WTF_PRETTY_FUNCTION, "CHECK_NOT_EQ("#_actual ", " #_expected ")"); \
CRASH(); \
} while (false)
bool isPC(MacroAssembler::RegisterID id)
{
#if CPU(ARM_THUMB2)
return id == ARMRegisters::pc;
#else
UNUSED_PARAM(id);
return false;
#endif
}
bool isSP(MacroAssembler::RegisterID id)
{
return id == MacroAssembler::stackPointerRegister;
}
bool isFP(MacroAssembler::RegisterID id)
{
return id == MacroAssembler::framePointerRegister;
}
bool isSpecialGPR(MacroAssembler::RegisterID id)
{
if (isPC(id) || isSP(id) || isFP(id))
return true;
#if CPU(ARM64)
if (id == ARM64Registers::x18)
return true;
#elif CPU(RISCV64)
if (id == RISCV64Registers::zero || id == RISCV64Registers::ra || id == RISCV64Registers::gp || id == RISCV64Registers::tp)
return true;
#endif
return false;
}
MacroAssemblerCodeRef<JSEntryPtrTag> compile(Generator&& generate)
{
CCallHelpers jit;
generate(jit);
LinkBuffer linkBuffer(jit, nullptr);
return FINALIZE_CODE(linkBuffer, JSEntryPtrTag, nullptr, "testmasm compilation");
}
template<typename T, typename... Arguments>
T invoke(const MacroAssemblerCodeRef<JSEntryPtrTag>& code, Arguments... arguments)
{
void* executableAddress = untagCFunctionPtr<JSEntryPtrTag>(code.code().taggedPtr());
T (*function)(Arguments...) = bitwise_cast<T(*)(Arguments...)>(executableAddress);
#if CPU(RISCV64)
// RV64 calling convention requires all 32-bit values to be sign-extended into the whole register.
// JSC JIT is tailored for other ISAs that pass these values in 32-bit-wide registers, which RISC-V
// doesn't support, so any 32-bit value passed in return-value registers has to be manually sign-extended.
// This mirrors sign-extension of 32-bit values in argument registers on RV64 in CCallHelpers.h.
if constexpr (std::is_integral_v<T>) {
T returnValue = function(arguments...);
if constexpr (sizeof(T) == 4) {
asm volatile(
"sext.w %[out_value], %[in_value]\n\t"
: [out_value] "=r" (returnValue)
: [in_value] "r" (returnValue));
}
return returnValue;
}
#endif
return function(arguments...);
}
template<typename T, typename... Arguments>
T compileAndRun(Generator&& generator, Arguments... arguments)
{
return invoke<T>(compile(WTFMove(generator)), arguments...);
}
void emitFunctionPrologue(CCallHelpers& jit)
{
jit.emitFunctionPrologue();
#if CPU(ARM_THUMB2)
// MacroAssemblerARMv7 uses r6 as a temporary register, which is a
// callee-saved register, see 5.1.1 of the Procedure Call Standard for
// the ARM Architecture.
// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042f/IHI0042F_aapcs.pdf
jit.push(ARMRegisters::r6);
#endif
}
void emitFunctionEpilogue(CCallHelpers& jit)
{
#if CPU(ARM_THUMB2)
jit.pop(ARMRegisters::r6);
#endif
jit.emitFunctionEpilogue();
}
void testSimple()
{
CHECK_EQ(compileAndRun<int>([] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.move(CCallHelpers::TrustedImm32(42), GPRInfo::returnValueGPR);
emitFunctionEpilogue(jit);
jit.ret();
}), 42);
}
void testGetEffectiveAddress(size_t pointer, ptrdiff_t length, int32_t offset, CCallHelpers::Scale scale)
{
CHECK_EQ(compileAndRun<size_t>([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.move(CCallHelpers::TrustedImmPtr(bitwise_cast<void*>(pointer)), GPRInfo::regT0);
jit.move(CCallHelpers::TrustedImmPtr(bitwise_cast<void*>(length)), GPRInfo::regT1);
jit.getEffectiveAddress(CCallHelpers::BaseIndex(GPRInfo::regT0, GPRInfo::regT1, scale, offset), GPRInfo::returnValueGPR);
emitFunctionEpilogue(jit);
jit.ret();
}), pointer + offset + (static_cast<size_t>(1) << static_cast<int>(scale)) * length);
}
// branchTruncateDoubleToInt32(), when encountering Infinity, -Infinity or a
// Nan, should either yield 0 in dest or fail.
void testBranchTruncateDoubleToInt32(double val, int32_t expected)
{
const uint64_t valAsUInt = bitwise_cast<uint64_t>(val);
#if CPU(BIG_ENDIAN)
const bool isBigEndian = true;
#else
const bool isBigEndian = false;
#endif
CHECK_EQ(compileAndRun<int>([&] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.subPtr(CCallHelpers::TrustedImm32(stackAlignmentBytes()), MacroAssembler::stackPointerRegister);
if (isBigEndian) {
jit.store32(CCallHelpers::TrustedImm32(valAsUInt >> 32),
MacroAssembler::Address(MacroAssembler::stackPointerRegister));
jit.store32(CCallHelpers::TrustedImm32(valAsUInt & 0xffffffff),
MacroAssembler::Address(MacroAssembler::stackPointerRegister, 4));
} else {
jit.store32(CCallHelpers::TrustedImm32(valAsUInt & 0xffffffff),
MacroAssembler::Address(MacroAssembler::stackPointerRegister));
jit.store32(CCallHelpers::TrustedImm32(valAsUInt >> 32),
MacroAssembler::Address(MacroAssembler::stackPointerRegister, 4));
}
jit.loadDouble(MacroAssembler::Address(MacroAssembler::stackPointerRegister), FPRInfo::fpRegT0);
MacroAssembler::Jump done;
done = jit.branchTruncateDoubleToInt32(FPRInfo::fpRegT0, GPRInfo::returnValueGPR, MacroAssembler::BranchIfTruncateSuccessful);
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
done.link(&jit);
jit.addPtr(CCallHelpers::TrustedImm32(stackAlignmentBytes()), MacroAssembler::stackPointerRegister);
emitFunctionEpilogue(jit);
jit.ret();
}), expected);
}
void testBranchTest8()
{
for (auto value : int32Operands()) {
for (auto value2 : int32Operands()) {
auto test1 = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTest8(MacroAssembler::NonZero, CCallHelpers::Address(GPRInfo::argumentGPR0, 1), CCallHelpers::TrustedImm32(value2));
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm32(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
auto test2 = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTest8(MacroAssembler::NonZero, CCallHelpers::BaseIndex(GPRInfo::argumentGPR0, GPRInfo::argumentGPR1, CCallHelpers::TimesOne), CCallHelpers::TrustedImm32(value2));
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm32(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
int result = 0;
if (static_cast<uint8_t>(value) & static_cast<uint8_t>(value2))
result = 1;
uint8_t array[] = {
0,
static_cast<uint8_t>(value)
};
CHECK_EQ(invoke<int>(test1, array), result);
CHECK_EQ(invoke<int>(test2, array, 1), result);
}
}
}
void testBranchTest16()
{
for (auto value : int32Operands()) {
for (auto value2 : int32Operands()) {
auto test1 = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTest16(MacroAssembler::NonZero, CCallHelpers::Address(GPRInfo::argumentGPR0, 2), CCallHelpers::TrustedImm32(value2));
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm32(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
auto test2 = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTest16(MacroAssembler::NonZero, CCallHelpers::BaseIndex(GPRInfo::argumentGPR0, GPRInfo::argumentGPR1, CCallHelpers::TimesTwo), CCallHelpers::TrustedImm32(value2));
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm32(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
int result = 0;
if (static_cast<uint16_t>(value) & static_cast<uint16_t>(value2))
result = 1;
uint16_t array[] = {
0,
static_cast<uint16_t>(value)
};
CHECK_EQ(invoke<int>(test1, array), result);
CHECK_EQ(invoke<int>(test2, array, 1), result);
}
}
}
#if CPU(X86_64)
void testBranchTestBit32RegReg()
{
for (auto value : int32Operands()) {
auto test = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTestBit32(MacroAssembler::NonZero, GPRInfo::argumentGPR0, GPRInfo::argumentGPR1);
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm32(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value2 : int32Operands())
CHECK_EQ(invoke<int>(test, value, value2), (value>>(value2%32))&1);
}
}
void testBranchTestBit32RegImm()
{
for (auto value : int32Operands()) {
auto test = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTestBit32(MacroAssembler::NonZero, GPRInfo::argumentGPR0, CCallHelpers::TrustedImm32(value));
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm32(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value2 : int32Operands())
CHECK_EQ(invoke<int>(test, value2), (value2>>(value%32))&1);
}
}
void testBranchTestBit32AddrImm()
{
for (auto value : int32Operands()) {
auto test = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTestBit32(MacroAssembler::NonZero, MacroAssembler::Address(GPRInfo::argumentGPR0, 0), CCallHelpers::TrustedImm32(value));
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm32(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value2 : int32Operands())
CHECK_EQ(invoke<int>(test, &value2), (value2>>(value%32))&1);
}
}
void testBranchTestBit64RegReg()
{
for (auto value : int64Operands()) {
auto test = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTestBit64(MacroAssembler::NonZero, GPRInfo::argumentGPR0, GPRInfo::argumentGPR1);
jit.move(CCallHelpers::TrustedImm64(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm64(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value2 : int64Operands())
CHECK_EQ(invoke<long int>(test, value, value2), (value>>(value2%64))&1);
}
}
void testBranchTestBit64RegImm()
{
for (auto value : int64Operands()) {
auto test = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTestBit64(MacroAssembler::NonZero, GPRInfo::argumentGPR0, CCallHelpers::TrustedImm32(value));
jit.move(CCallHelpers::TrustedImm64(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm64(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value2 : int64Operands())
CHECK_EQ(invoke<long int>(test, value2), (value2>>(value%64))&1);
}
}
void testBranchTestBit64AddrImm()
{
for (auto value : int64Operands()) {
auto test = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
auto branch = jit.branchTestBit64(MacroAssembler::NonZero, MacroAssembler::Address(GPRInfo::argumentGPR0, 0), CCallHelpers::TrustedImm32(value));
jit.move(CCallHelpers::TrustedImm64(0), GPRInfo::returnValueGPR);
auto done = jit.jump();
branch.link(&jit);
jit.move(CCallHelpers::TrustedImm64(1), GPRInfo::returnValueGPR);
done.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value2 : int64Operands())
CHECK_EQ(invoke<long int>(test, &value2), (value2>>(value%64))&1);
}
}
#endif
#if CPU(X86_64) || CPU(ARM64)
void testClearBit64()
{
auto test = compile([] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
GPRReg scratchGPR = GPRInfo::argumentGPR2;
jit.clearBit64(GPRInfo::argumentGPR1, GPRInfo::argumentGPR0, scratchGPR);
jit.move(GPRInfo::argumentGPR0, GPRInfo::returnValueGPR);
emitFunctionEpilogue(jit);
jit.ret();
});
constexpr unsigned bitsInWord = sizeof(uint64_t) * 8;
for (unsigned i = 0; i < bitsInWord; ++i) {
uint64_t word = std::numeric_limits<uint64_t>::max();
constexpr uint64_t one = 1;
CHECK_EQ(invoke<uint64_t>(test, word, i), (word & ~(one << i)));
}
for (unsigned i = 0; i < bitsInWord; ++i) {
uint64_t word = 0;
CHECK_EQ(invoke<uint64_t>(test, word, i), 0);
}
}
void testClearBits64WithMask()
{
auto test = compile([] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.clearBits64WithMask(GPRInfo::argumentGPR1, GPRInfo::argumentGPR0);
jit.move(GPRInfo::argumentGPR0, GPRInfo::returnValueGPR);
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value : int64Operands()) {
uint64_t word = std::numeric_limits<uint64_t>::max();
CHECK_EQ(invoke<uint64_t>(test, word, value), (word & ~value));
}
for (auto value : int64Operands()) {
uint64_t word = 0;
CHECK_EQ(invoke<uint64_t>(test, word, value), 0);
}
uint64_t savedMask = 0;
auto test2 = compile([&] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.probeDebug([&] (Probe::Context& context) {
savedMask = context.gpr<uint64_t>(GPRInfo::argumentGPR1);
});
jit.clearBits64WithMask(GPRInfo::argumentGPR1, GPRInfo::argumentGPR0, CCallHelpers::ClearBitsAttributes::MustPreserveMask);
jit.probeDebug([&] (Probe::Context& context) {
CHECK_EQ(savedMask, context.gpr<uint64_t>(GPRInfo::argumentGPR1));
});
jit.move(GPRInfo::argumentGPR0, GPRInfo::returnValueGPR);
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value : int64Operands()) {
uint64_t word = std::numeric_limits<uint64_t>::max();
CHECK_EQ(invoke<uint64_t>(test2, word, value), (word & ~value));
}
for (auto value : int64Operands()) {
uint64_t word = 0;
CHECK_EQ(invoke<uint64_t>(test2, word, value), 0);
}
}
void testClearBits64WithMaskTernary()
{
auto test = compile([] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.move(GPRInfo::argumentGPR0, GPRInfo::argumentGPR2);
jit.move(GPRInfo::argumentGPR1, GPRInfo::argumentGPR3);
jit.clearBits64WithMask(GPRInfo::argumentGPR2, GPRInfo::argumentGPR3, GPRInfo::returnValueGPR);
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value : int64Operands()) {
uint64_t word = std::numeric_limits<uint64_t>::max();
CHECK_EQ(invoke<uint64_t>(test, word, value), (word & ~value));
}
for (auto value : int64Operands()) {
uint64_t word = 0;
CHECK_EQ(invoke<uint64_t>(test, word, value), 0);
}
uint64_t savedMask = 0;
auto test2 = compile([&] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.move(GPRInfo::argumentGPR0, GPRInfo::argumentGPR2);
jit.move(GPRInfo::argumentGPR1, GPRInfo::argumentGPR3);
jit.probeDebug([&] (Probe::Context& context) {
savedMask = context.gpr<uint64_t>(GPRInfo::argumentGPR2);
});
jit.clearBits64WithMask(GPRInfo::argumentGPR2, GPRInfo::argumentGPR3, GPRInfo::returnValueGPR, CCallHelpers::ClearBitsAttributes::MustPreserveMask);
jit.probeDebug([&] (Probe::Context& context) {
CHECK_EQ(savedMask, context.gpr<uint64_t>(GPRInfo::argumentGPR2));
});
emitFunctionEpilogue(jit);
jit.ret();
});
for (auto value : int64Operands()) {
uint64_t word = std::numeric_limits<uint64_t>::max();
CHECK_EQ(invoke<uint64_t>(test2, word, value), (word & ~value));
}
for (auto value : int64Operands()) {
uint64_t word = 0;
CHECK_EQ(invoke<uint64_t>(test2, word, value), 0);
}
}
static void testCountTrailingZeros64Impl(bool wordCanBeZero)
{
auto test = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
if (wordCanBeZero)
jit.countTrailingZeros64(GPRInfo::argumentGPR0, GPRInfo::returnValueGPR);
else
jit.countTrailingZeros64WithoutNullCheck(GPRInfo::argumentGPR0, GPRInfo::returnValueGPR);
emitFunctionEpilogue(jit);
jit.ret();
});
constexpr size_t numberOfBits = sizeof(uint64_t) * 8;
auto expectedNumberOfTrailingZeros = [=] (uint64_t word) -> size_t {
size_t count = 0;
for (size_t i = 0; i < numberOfBits; ++i) {
if (word & 1)
break;
word >>= 1;
count++;
}
return count;
};
for (auto word : int64Operands()) {
if (!wordCanBeZero && !word)
continue;
CHECK_EQ(invoke<size_t>(test, word), expectedNumberOfTrailingZeros(word));
}
for (size_t i = 0; i < numberOfBits; ++i) {
uint64_t one = 1;
uint64_t word = one << i;
CHECK_EQ(invoke<size_t>(test, word), i);
}
}
void testCountTrailingZeros64()
{
bool wordCanBeZero = true;
testCountTrailingZeros64Impl(wordCanBeZero);
}
void testCountTrailingZeros64WithoutNullCheck()
{
bool wordCanBeZero = false;
testCountTrailingZeros64Impl(wordCanBeZero);
}
void testShiftAndAdd()
{
constexpr intptr_t basePointer = 0x1234abcd;
enum class Reg {
ArgumentGPR0,
ArgumentGPR1,
ArgumentGPR2,
ArgumentGPR3,
ScratchGPR
};
auto test = [&] (intptr_t index, uint8_t shift, Reg destReg, Reg baseReg, Reg indexReg) {
auto test = compile([=] (CCallHelpers& jit) {
CCallHelpers::RegisterID scratchGPR = jit.scratchRegister();
auto registerIDForReg = [=] (Reg reg) -> CCallHelpers::RegisterID {
switch (reg) {
case Reg::ArgumentGPR0: return GPRInfo::argumentGPR0;
case Reg::ArgumentGPR1: return GPRInfo::argumentGPR1;
case Reg::ArgumentGPR2: return GPRInfo::argumentGPR2;
case Reg::ArgumentGPR3: return GPRInfo::argumentGPR3;
case Reg::ScratchGPR: return scratchGPR;
}
RELEASE_ASSERT_NOT_REACHED();
};
CCallHelpers::RegisterID destGPR = registerIDForReg(destReg);
CCallHelpers::RegisterID baseGPR = registerIDForReg(baseReg);
CCallHelpers::RegisterID indexGPR = registerIDForReg(indexReg);
emitFunctionPrologue(jit);
jit.pushPair(scratchGPR, GPRInfo::argumentGPR3);
jit.move(CCallHelpers::TrustedImmPtr(bitwise_cast<void*>(basePointer)), baseGPR);
jit.move(CCallHelpers::TrustedImmPtr(bitwise_cast<void*>(index)), indexGPR);
jit.shiftAndAdd(baseGPR, indexGPR, shift, destGPR);
jit.probeDebug([=] (Probe::Context& context) {
if (baseReg != destReg)
CHECK_EQ(context.gpr<intptr_t>(baseGPR), basePointer);
if (indexReg != destReg)
CHECK_EQ(context.gpr<intptr_t>(indexGPR), index);
});
jit.move(destGPR, GPRInfo::returnValueGPR);
jit.popPair(scratchGPR, GPRInfo::argumentGPR3);
emitFunctionEpilogue(jit);
jit.ret();
});
CHECK_EQ(invoke<intptr_t>(test), basePointer + (index << shift));
};
for (auto index : int32Operands()) {
for (uint8_t shift = 0; shift < 32; ++shift) {
test(index, shift, Reg::ScratchGPR, Reg::ScratchGPR, Reg::ArgumentGPR3); // Scenario: dest == base == scratchRegister.
test(index, shift, Reg::ArgumentGPR2, Reg::ArgumentGPR2, Reg::ArgumentGPR3); // Scenario: dest == base != scratchRegister.
test(index, shift, Reg::ScratchGPR, Reg::ArgumentGPR2, Reg::ScratchGPR); // Scenario: dest == index == scratchRegister.
test(index, shift, Reg::ArgumentGPR3, Reg::ArgumentGPR2, Reg::ArgumentGPR3); // Scenario: dest == index != scratchRegister.
test(index, shift, Reg::ArgumentGPR1, Reg::ArgumentGPR2, Reg::ArgumentGPR3); // Scenario: all different registers, no scratchRegister.
test(index, shift, Reg::ScratchGPR, Reg::ArgumentGPR2, Reg::ArgumentGPR3); // Scenario: all different registers, dest == scratchRegister.
test(index, shift, Reg::ArgumentGPR1, Reg::ScratchGPR, Reg::ArgumentGPR3); // Scenario: all different registers, base == scratchRegister.
test(index, shift, Reg::ArgumentGPR1, Reg::ArgumentGPR2, Reg::ScratchGPR); // Scenario: all different registers, index == scratchRegister.
}
}
}
void testStore64Imm64AddressPointer()
{
auto doTest = [] (int64_t value) {
int64_t dest;
void* destAddress = &dest;
auto test = compile([=] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.store64(CCallHelpers::TrustedImm64(value), destAddress);
emitFunctionEpilogue(jit);
jit.ret();
});
invoke<size_t>(test);
CHECK_EQ(dest, value);
};
for (auto value : int64Operands())
doTest(value);
doTest(0x98765555AAAA4321);
doTest(0xAAAA432198765555);
}
#endif // CPU(X86_64) || CPU(ARM64)
void testCompareDouble(MacroAssembler::DoubleCondition condition)
{
double arg1 = 0;
double arg2 = 0;
auto compareDouble = compile([&, condition] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.loadDouble(CCallHelpers::TrustedImmPtr(&arg1), FPRInfo::fpRegT0);
jit.loadDouble(CCallHelpers::TrustedImmPtr(&arg2), FPRInfo::fpRegT1);
jit.move(CCallHelpers::TrustedImm32(-1), GPRInfo::returnValueGPR);
jit.compareDouble(condition, FPRInfo::fpRegT0, FPRInfo::fpRegT1, GPRInfo::returnValueGPR);
emitFunctionEpilogue(jit);
jit.ret();
});
auto compareDoubleGeneric = compile([&, condition] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.loadDouble(CCallHelpers::TrustedImmPtr(&arg1), FPRInfo::fpRegT0);
jit.loadDouble(CCallHelpers::TrustedImmPtr(&arg2), FPRInfo::fpRegT1);
jit.move(CCallHelpers::TrustedImm32(1), GPRInfo::returnValueGPR);
auto jump = jit.branchDouble(condition, FPRInfo::fpRegT0, FPRInfo::fpRegT1);
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
jump.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
auto expectedResult = [&, condition] (double a, double b) -> int {
auto isUnordered = [] (double x) {
return x != x;
};
switch (condition) {
case MacroAssembler::DoubleEqualAndOrdered:
return !isUnordered(a) && !isUnordered(b) && (a == b);
case MacroAssembler::DoubleNotEqualAndOrdered:
return !isUnordered(a) && !isUnordered(b) && (a != b);
case MacroAssembler::DoubleGreaterThanAndOrdered:
return !isUnordered(a) && !isUnordered(b) && (a > b);
case MacroAssembler::DoubleGreaterThanOrEqualAndOrdered:
return !isUnordered(a) && !isUnordered(b) && (a >= b);
case MacroAssembler::DoubleLessThanAndOrdered:
return !isUnordered(a) && !isUnordered(b) && (a < b);
case MacroAssembler::DoubleLessThanOrEqualAndOrdered:
return !isUnordered(a) && !isUnordered(b) && (a <= b);
case MacroAssembler::DoubleEqualOrUnordered:
return isUnordered(a) || isUnordered(b) || (a == b);
case MacroAssembler::DoubleNotEqualOrUnordered:
return isUnordered(a) || isUnordered(b) || (a != b);
case MacroAssembler::DoubleGreaterThanOrUnordered:
return isUnordered(a) || isUnordered(b) || (a > b);
case MacroAssembler::DoubleGreaterThanOrEqualOrUnordered:
return isUnordered(a) || isUnordered(b) || (a >= b);
case MacroAssembler::DoubleLessThanOrUnordered:
return isUnordered(a) || isUnordered(b) || (a < b);
case MacroAssembler::DoubleLessThanOrEqualOrUnordered:
return isUnordered(a) || isUnordered(b) || (a <= b);
} // switch
RELEASE_ASSERT_NOT_REACHED();
};
auto operands = doubleOperands();
for (auto a : operands) {
for (auto b : operands) {
arg1 = a;
arg2 = b;
CHECK_EQ(invoke<int>(compareDouble), expectedResult(a, b));
CHECK_EQ(invoke<int>(compareDoubleGeneric), expectedResult(a, b));
}
}
}
void testCompareDoubleSameArg(MacroAssembler::DoubleCondition condition)
{
double arg1 = 0;
auto compareDouble = compile([&, condition] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.loadDouble(CCallHelpers::TrustedImmPtr(&arg1), FPRInfo::fpRegT0);
jit.move(CCallHelpers::TrustedImm32(-1), GPRInfo::returnValueGPR);
jit.compareDouble(condition, FPRInfo::fpRegT0, FPRInfo::fpRegT0, GPRInfo::returnValueGPR);
emitFunctionEpilogue(jit);
jit.ret();
});
auto compareDoubleGeneric = compile([&, condition] (CCallHelpers& jit) {
emitFunctionPrologue(jit);
jit.loadDouble(CCallHelpers::TrustedImmPtr(&arg1), FPRInfo::fpRegT0);
jit.move(CCallHelpers::TrustedImm32(1), GPRInfo::returnValueGPR);
auto jump = jit.branchDouble(condition, FPRInfo::fpRegT0, FPRInfo::fpRegT0);
jit.move(CCallHelpers::TrustedImm32(0), GPRInfo::returnValueGPR);
jump.link(&jit);
emitFunctionEpilogue(jit);
jit.ret();
});
auto expectedResult = [&, condition] (double a) -> int {
auto isUnordered = [] (double x) {
return x != x;
};
switch (condition) {
case MacroAssembler::DoubleEqualAndOrdered:
return !isUnordered(a) && (a == a);
case MacroAssembler::DoubleNotEqualAndOrdered:
return !isUnordered(a) && (a != a);
case MacroAssembler::DoubleGreaterThanAndOrdered: