Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "jit/x64/MacroAssembler-x64.h"
#include "jit/BaselineFrame.h"
#include "jit/JitFrames.h"
#include "jit/JitRuntime.h"
#include "jit/MacroAssembler.h"
#include "jit/MoveEmitter.h"
#include "util/Memory.h"
#include "vm/BigIntType.h"
#include "vm/JitActivation.h" // js::jit::JitActivation
#include "vm/JSContext.h"
#include "vm/StringType.h"
#include "wasm/WasmStubs.h"
#include "jit/MacroAssembler-inl.h"
using namespace js;
using namespace js::jit;
void MacroAssemblerX64::loadConstantDouble(double d, FloatRegister dest) {
if (maybeInlineDouble(d, dest)) {
return;
}
Double* dbl = getDouble(d);
if (!dbl) {
return;
}
// The constants will be stored in a pool appended to the text (see
// finish()), so they will always be a fixed distance from the
// instructions which reference them. This allows the instructions to use
// PC-relative addressing. Use "jump" label support code, because we need
// the same PC-relative address patching that jumps use.
JmpSrc j = masm.vmovsd_ripr(dest.encoding());
propagateOOM(dbl->uses.append(j));
}
void MacroAssemblerX64::loadConstantFloat32(float f, FloatRegister dest) {
if (maybeInlineFloat(f, dest)) {
return;
}
Float* flt = getFloat(f);
if (!flt) {
return;
}
// See comment in loadConstantDouble
JmpSrc j = masm.vmovss_ripr(dest.encoding());
propagateOOM(flt->uses.append(j));
}
void MacroAssemblerX64::vpRiprOpSimd128(
const SimdConstant& v, FloatRegister reg,
JmpSrc (X86Encoding::BaseAssemblerX64::*op)(
X86Encoding::XMMRegisterID id)) {
SimdData* val = getSimdData(v);
if (!val) {
return;
}
JmpSrc j = (masm.*op)(reg.encoding());
propagateOOM(val->uses.append(j));
}
void MacroAssemblerX64::vpRiprOpSimd128(
const SimdConstant& v, FloatRegister src, FloatRegister dest,
JmpSrc (X86Encoding::BaseAssemblerX64::*op)(
X86Encoding::XMMRegisterID srcId, X86Encoding::XMMRegisterID destId)) {
SimdData* val = getSimdData(v);
if (!val) {
return;
}
JmpSrc j = (masm.*op)(src.encoding(), dest.encoding());
propagateOOM(val->uses.append(j));
}
void MacroAssemblerX64::loadConstantSimd128Int(const SimdConstant& v,
FloatRegister dest) {
if (maybeInlineSimd128Int(v, dest)) {
return;
}
vpRiprOpSimd128(v, dest, &X86Encoding::BaseAssemblerX64::vmovdqa_ripr);
}
void MacroAssemblerX64::loadConstantSimd128Float(const SimdConstant& v,
FloatRegister dest) {
if (maybeInlineSimd128Float(v, dest)) {
return;
}
vpRiprOpSimd128(v, dest, &X86Encoding::BaseAssemblerX64::vmovaps_ripr);
}
void MacroAssemblerX64::vpaddbSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpaddb_ripr);
}
void MacroAssemblerX64::vpaddwSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpaddw_ripr);
}
void MacroAssemblerX64::vpadddSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpaddd_ripr);
}
void MacroAssemblerX64::vpaddqSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpaddq_ripr);
}
void MacroAssemblerX64::vpsubbSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpsubb_ripr);
}
void MacroAssemblerX64::vpsubwSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpsubw_ripr);
}
void MacroAssemblerX64::vpsubdSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpsubd_ripr);
}
void MacroAssemblerX64::vpsubqSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpsubq_ripr);
}
void MacroAssemblerX64::vpmullwSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmullw_ripr);
}
void MacroAssemblerX64::vpmulldSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmulld_ripr);
}
void MacroAssemblerX64::vpaddsbSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpaddsb_ripr);
}
void MacroAssemblerX64::vpaddusbSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpaddusb_ripr);
}
void MacroAssemblerX64::vpaddswSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpaddsw_ripr);
}
void MacroAssemblerX64::vpadduswSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpaddusw_ripr);
}
void MacroAssemblerX64::vpsubsbSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpsubsb_ripr);
}
void MacroAssemblerX64::vpsubusbSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpsubusb_ripr);
}
void MacroAssemblerX64::vpsubswSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpsubsw_ripr);
}
void MacroAssemblerX64::vpsubuswSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpsubusw_ripr);
}
void MacroAssemblerX64::vpminsbSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpminsb_ripr);
}
void MacroAssemblerX64::vpminubSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpminub_ripr);
}
void MacroAssemblerX64::vpminswSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpminsw_ripr);
}
void MacroAssemblerX64::vpminuwSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpminuw_ripr);
}
void MacroAssemblerX64::vpminsdSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpminsd_ripr);
}
void MacroAssemblerX64::vpminudSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpminud_ripr);
}
void MacroAssemblerX64::vpmaxsbSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmaxsb_ripr);
}
void MacroAssemblerX64::vpmaxubSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmaxub_ripr);
}
void MacroAssemblerX64::vpmaxswSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmaxsw_ripr);
}
void MacroAssemblerX64::vpmaxuwSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmaxuw_ripr);
}
void MacroAssemblerX64::vpmaxsdSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmaxsd_ripr);
}
void MacroAssemblerX64::vpmaxudSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmaxud_ripr);
}
void MacroAssemblerX64::vpandSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpand_ripr);
}
void MacroAssemblerX64::vpxorSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpxor_ripr);
}
void MacroAssemblerX64::vporSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpor_ripr);
}
void MacroAssemblerX64::vaddpsSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vaddps_ripr);
}
void MacroAssemblerX64::vaddpdSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vaddpd_ripr);
}
void MacroAssemblerX64::vsubpsSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vsubps_ripr);
}
void MacroAssemblerX64::vsubpdSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vsubpd_ripr);
}
void MacroAssemblerX64::vdivpsSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vdivps_ripr);
}
void MacroAssemblerX64::vdivpdSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vdivpd_ripr);
}
void MacroAssemblerX64::vmulpsSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vmulps_ripr);
}
void MacroAssemblerX64::vmulpdSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vmulpd_ripr);
}
void MacroAssemblerX64::vandpdSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vandpd_ripr);
}
void MacroAssemblerX64::vminpdSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vminpd_ripr);
}
void MacroAssemblerX64::vpacksswbSimd128(const SimdConstant& v,
FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpacksswb_ripr);
}
void MacroAssemblerX64::vpackuswbSimd128(const SimdConstant& v,
FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpackuswb_ripr);
}
void MacroAssemblerX64::vpackssdwSimd128(const SimdConstant& v,
FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpackssdw_ripr);
}
void MacroAssemblerX64::vpackusdwSimd128(const SimdConstant& v,
FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpackusdw_ripr);
}
void MacroAssemblerX64::vpunpckldqSimd128(const SimdConstant& v,
FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest,
&X86Encoding::BaseAssemblerX64::vpunpckldq_ripr);
}
void MacroAssemblerX64::vunpcklpsSimd128(const SimdConstant& v,
FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vunpcklps_ripr);
}
void MacroAssemblerX64::vpshufbSimd128(const SimdConstant& v, FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpshufb_ripr);
}
void MacroAssemblerX64::vptestSimd128(const SimdConstant& v,
FloatRegister lhs) {
vpRiprOpSimd128(v, lhs, &X86Encoding::BaseAssemblerX64::vptest_ripr);
}
void MacroAssemblerX64::vpmaddwdSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmaddwd_ripr);
}
void MacroAssemblerX64::vpcmpeqbSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpcmpeqb_ripr);
}
void MacroAssemblerX64::vpcmpgtbSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpcmpgtb_ripr);
}
void MacroAssemblerX64::vpcmpeqwSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpcmpeqw_ripr);
}
void MacroAssemblerX64::vpcmpgtwSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpcmpgtw_ripr);
}
void MacroAssemblerX64::vpcmpeqdSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpcmpeqd_ripr);
}
void MacroAssemblerX64::vpcmpgtdSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpcmpgtd_ripr);
}
void MacroAssemblerX64::vcmpeqpsSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vcmpeqps_ripr);
}
void MacroAssemblerX64::vcmpneqpsSimd128(const SimdConstant& v,
FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vcmpneqps_ripr);
}
void MacroAssemblerX64::vcmpltpsSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vcmpltps_ripr);
}
void MacroAssemblerX64::vcmplepsSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vcmpleps_ripr);
}
void MacroAssemblerX64::vcmpgepsSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vcmpgeps_ripr);
}
void MacroAssemblerX64::vcmpeqpdSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vcmpeqpd_ripr);
}
void MacroAssemblerX64::vcmpneqpdSimd128(const SimdConstant& v,
FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vcmpneqpd_ripr);
}
void MacroAssemblerX64::vcmpltpdSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vcmpltpd_ripr);
}
void MacroAssemblerX64::vcmplepdSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vcmplepd_ripr);
}
void MacroAssemblerX64::vpmaddubswSimd128(const SimdConstant& v,
FloatRegister lhs,
FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest,
&X86Encoding::BaseAssemblerX64::vpmaddubsw_ripr);
}
void MacroAssemblerX64::vpmuludqSimd128(const SimdConstant& v,
FloatRegister lhs, FloatRegister dest) {
vpRiprOpSimd128(v, lhs, dest, &X86Encoding::BaseAssemblerX64::vpmuludq_ripr);
}
void MacroAssemblerX64::bindOffsets(
const MacroAssemblerX86Shared::UsesVector& uses) {
for (JmpSrc src : uses) {
JmpDst dst(currentOffset());
// Using linkJump here is safe, as explained in the comment in
// loadConstantDouble.
masm.linkJump(src, dst);
}
}
void MacroAssemblerX64::finish() {
if (!doubles_.empty()) {
masm.haltingAlign(sizeof(double));
}
for (const Double& d : doubles_) {
bindOffsets(d.uses);
masm.doubleConstant(d.value);
}
if (!floats_.empty()) {
masm.haltingAlign(sizeof(float));
}
for (const Float& f : floats_) {
bindOffsets(f.uses);
masm.floatConstant(f.value);
}
// SIMD memory values must be suitably aligned.
if (!simds_.empty()) {
masm.haltingAlign(SimdMemoryAlignment);
}
for (const SimdData& v : simds_) {
bindOffsets(v.uses);
masm.simd128Constant(v.value.bytes());
}
MacroAssemblerX86Shared::finish();
}
void MacroAssemblerX64::boxValue(JSValueType type, Register src,
Register dest) {
MOZ_ASSERT(src != dest);
JSValueShiftedTag tag = (JSValueShiftedTag)JSVAL_TYPE_TO_SHIFTED_TAG(type);
#ifdef DEBUG
if (type == JSVAL_TYPE_INT32 || type == JSVAL_TYPE_BOOLEAN) {
Label upper32BitsZeroed;
movePtr(ImmWord(UINT32_MAX), dest);
asMasm().branchPtr(Assembler::BelowOrEqual, src, dest, &upper32BitsZeroed);
breakpoint();
bind(&upper32BitsZeroed);
}
#endif
mov(ImmShiftedTag(tag), dest);
orq(src, dest);
}
void MacroAssemblerX64::handleFailureWithHandlerTail(
Label* profilerExitTail, Label* bailoutTail,
uint32_t* returnValueCheckOffset) {
// Reserve space for exception information.
subq(Imm32(sizeof(ResumeFromException)), rsp);
movq(rsp, rax);
// Call the handler.
using Fn = void (*)(ResumeFromException* rfe);
asMasm().setupUnalignedABICall(rcx);
asMasm().passABIArg(rax);
asMasm().callWithABI<Fn, HandleException>(
ABIType::General, CheckUnsafeCallWithABI::DontCheckHasExitFrame);
*returnValueCheckOffset = asMasm().currentOffset();
Label entryFrame;
Label catch_;
Label finally;
Label returnBaseline;
Label returnIon;
Label bailout;
Label wasmInterpEntry;
Label wasmCatch;
load32(Address(rsp, ResumeFromException::offsetOfKind()), rax);
asMasm().branch32(Assembler::Equal, rax,
Imm32(ExceptionResumeKind::EntryFrame), &entryFrame);
asMasm().branch32(Assembler::Equal, rax, Imm32(ExceptionResumeKind::Catch),
&catch_);
asMasm().branch32(Assembler::Equal, rax, Imm32(ExceptionResumeKind::Finally),
&finally);
asMasm().branch32(Assembler::Equal, rax,
Imm32(ExceptionResumeKind::ForcedReturnBaseline),
&returnBaseline);
asMasm().branch32(Assembler::Equal, rax,
Imm32(ExceptionResumeKind::ForcedReturnIon), &returnIon);
asMasm().branch32(Assembler::Equal, rax, Imm32(ExceptionResumeKind::Bailout),
&bailout);
asMasm().branch32(Assembler::Equal, rax,
Imm32(ExceptionResumeKind::WasmInterpEntry),
&wasmInterpEntry);
asMasm().branch32(Assembler::Equal, rax,
Imm32(ExceptionResumeKind::WasmCatch), &wasmCatch);
breakpoint(); // Invalid kind.
// No exception handler. Load the error value, restore state and return from
// the entry frame.
bind(&entryFrame);
asMasm().moveValue(MagicValue(JS_ION_ERROR), JSReturnOperand);
loadPtr(Address(rsp, ResumeFromException::offsetOfFramePointer()), rbp);
loadPtr(Address(rsp, ResumeFromException::offsetOfStackPointer()), rsp);
ret();
// If we found a catch handler, this must be a baseline frame. Restore state
// and jump to the catch block.
bind(&catch_);
loadPtr(Address(rsp, ResumeFromException::offsetOfTarget()), rax);
loadPtr(Address(rsp, ResumeFromException::offsetOfFramePointer()), rbp);
loadPtr(Address(rsp, ResumeFromException::offsetOfStackPointer()), rsp);
jmp(Operand(rax));
// If we found a finally block, this must be a baseline frame. Push three
// values expected by the finally block: the exception, the exception stack,
// and BooleanValue(true).
bind(&finally);
ValueOperand exception = ValueOperand(rcx);
loadValue(Address(rsp, ResumeFromException::offsetOfException()), exception);
ValueOperand exceptionStack = ValueOperand(rdx);
loadValue(Address(rsp, ResumeFromException::offsetOfExceptionStack()),
exceptionStack);
loadPtr(Address(rsp, ResumeFromException::offsetOfTarget()), rax);
loadPtr(Address(rsp, ResumeFromException::offsetOfFramePointer()), rbp);
loadPtr(Address(rsp, ResumeFromException::offsetOfStackPointer()), rsp);
pushValue(exception);
pushValue(exceptionStack);
pushValue(BooleanValue(true));
jmp(Operand(rax));
// Return BaselineFrame->returnValue() to the caller.
// Used in debug mode and for GeneratorReturn.
Label profilingInstrumentation;
bind(&returnBaseline);
loadPtr(Address(rsp, ResumeFromException::offsetOfFramePointer()), rbp);
loadPtr(Address(rsp, ResumeFromException::offsetOfStackPointer()), rsp);
loadValue(Address(rbp, BaselineFrame::reverseOffsetOfReturnValue()),
JSReturnOperand);
jmp(&profilingInstrumentation);
// Return the given value to the caller.
bind(&returnIon);
loadValue(Address(rsp, ResumeFromException::offsetOfException()),
JSReturnOperand);
loadPtr(Address(rsp, ResumeFromException::offsetOfFramePointer()), rbp);
loadPtr(Address(rsp, ResumeFromException::offsetOfStackPointer()), rsp);
// If profiling is enabled, then update the lastProfilingFrame to refer to
// caller frame before returning. This code is shared by ForcedReturnIon
// and ForcedReturnBaseline.
bind(&profilingInstrumentation);
{
Label skipProfilingInstrumentation;
AbsoluteAddress addressOfEnabled(
asMasm().runtime()->geckoProfiler().addressOfEnabled());
asMasm().branch32(Assembler::Equal, addressOfEnabled, Imm32(0),
&skipProfilingInstrumentation);
jump(profilerExitTail);
bind(&skipProfilingInstrumentation);
}
movq(rbp, rsp);
pop(rbp);
ret();
// If we are bailing out to baseline to handle an exception, jump to the
// bailout tail stub. Load 1 (true) in ReturnReg to indicate success.
bind(&bailout);
loadPtr(Address(rsp, ResumeFromException::offsetOfBailoutInfo()), r9);
loadPtr(Address(rsp, ResumeFromException::offsetOfStackPointer()), rsp);
move32(Imm32(1), ReturnReg);
jump(bailoutTail);
// Reset SP and FP; SP is pointing to the unwound return address to the wasm
// interpreter entry, so we can just ret().
bind(&wasmInterpEntry);
loadPtr(Address(rsp, ResumeFromException::offsetOfFramePointer()), rbp);
loadPtr(Address(rsp, ResumeFromException::offsetOfStackPointer()), rsp);
movePtr(ImmPtr((const void*)wasm::InterpFailInstanceReg), InstanceReg);
masm.ret();
// Found a wasm catch handler, restore state and jump to it.
bind(&wasmCatch);
wasm::GenerateJumpToCatchHandler(asMasm(), rsp, rax, rbx);
}
void MacroAssemblerX64::profilerEnterFrame(Register framePtr,
Register scratch) {
asMasm().loadJSContext(scratch);
loadPtr(Address(scratch, offsetof(JSContext, profilingActivation_)), scratch);
storePtr(framePtr,
Address(scratch, JitActivation::offsetOfLastProfilingFrame()));
storePtr(ImmPtr(nullptr),
Address(scratch, JitActivation::offsetOfLastProfilingCallSite()));
}
void MacroAssemblerX64::profilerExitFrame() {
jump(asMasm().runtime()->jitRuntime()->getProfilerExitFrameTail());
}
Assembler::Condition MacroAssemblerX64::testStringTruthy(
bool truthy, const ValueOperand& value) {
ScratchRegisterScope scratch(asMasm());
unboxString(value, scratch);
cmp32(Operand(scratch, JSString::offsetOfLength()), Imm32(0));
return truthy ? Assembler::NotEqual : Assembler::Equal;
}
Assembler::Condition MacroAssemblerX64::testBigIntTruthy(
bool truthy, const ValueOperand& value) {
ScratchRegisterScope scratch(asMasm());
unboxBigInt(value, scratch);
cmp32(Operand(scratch, JS::BigInt::offsetOfDigitLength()), Imm32(0));
return truthy ? Assembler::NotEqual : Assembler::Equal;
}
MacroAssembler& MacroAssemblerX64::asMasm() {
return *static_cast<MacroAssembler*>(this);
}
const MacroAssembler& MacroAssemblerX64::asMasm() const {
return *static_cast<const MacroAssembler*>(this);
}
void MacroAssembler::subFromStackPtr(Imm32 imm32) {
if (imm32.value) {
// On windows, we cannot skip very far down the stack without touching the
// memory pages in-between. This is a corner-case code for situations where
// the Ion frame data for a piece of code is very large. To handle this
// special case, for frames over 4k in size we allocate memory on the stack
// incrementally, touching it as we go.
//
// When the amount is quite large, which it can be, we emit an actual loop,
// in order to keep the function prologue compact. Compactness is a
// requirement for eg Wasm's CodeRange data structure, which can encode only
// 8-bit offsets.
uint32_t amountLeft = imm32.value;
uint32_t fullPages = amountLeft / 4096;
if (fullPages <= 8) {
while (amountLeft > 4096) {
subq(Imm32(4096), StackPointer);
store32(Imm32(0), Address(StackPointer, 0));
amountLeft -= 4096;
}
subq(Imm32(amountLeft), StackPointer);
} else {
ScratchRegisterScope scratch(*this);
Label top;
move32(Imm32(fullPages), scratch);
bind(&top);
subq(Imm32(4096), StackPointer);
store32(Imm32(0), Address(StackPointer, 0));
subl(Imm32(1), scratch);
j(Assembler::NonZero, &top);
amountLeft -= fullPages * 4096;
if (amountLeft) {
subq(Imm32(amountLeft), StackPointer);
}
}
}
}
void MacroAssemblerX64::convertDoubleToPtr(FloatRegister src, Register dest,
Label* fail,
bool negativeZeroCheck) {
// Check for -0.0
if (negativeZeroCheck) {
branchNegativeZero(src, dest, fail);
}
ScratchDoubleScope scratch(asMasm());
vcvttsd2sq(src, dest);
asMasm().convertInt64ToDouble(Register64(dest), scratch);
vucomisd(scratch, src);
j(Assembler::Parity, fail);
j(Assembler::NotEqual, fail);
}
// This operation really consists of five phases, in order to enforce the
// restriction that on x64, srcDest must be rax and rdx will be clobbered.
//
// Input: { rhs, lhsOutput }
//
// [PUSH] Preserve registers
// [MOVE] Generate moves to specific registers
//
// [DIV] Input: { regForRhs, RAX }
// [DIV] extend RAX into RDX
// [DIV] x64 Division operator
// [DIV] Ouptut: { RAX, RDX }
//
// [MOVE] Move specific registers to outputs
// [POP] Restore registers
//
// Output: { lhsOutput, remainderOutput }
void MacroAssemblerX64::flexibleDivMod64(Register rhs, Register lhsOutput,
bool isUnsigned, bool isDiv) {
if (lhsOutput == rhs) {
movq(ImmWord(isDiv ? 1 : 0), lhsOutput);
return;
}
// Choose a register that is neither rdx nor rax to hold the rhs;
// rbx is chosen arbitrarily, and will be preserved if necessary.
Register regForRhs = (rhs == rax || rhs == rdx) ? rbx : rhs;
// Add registers we will be clobbering as live, but also remove the set we
// do not restore.
LiveGeneralRegisterSet preserve;
preserve.add(rdx);
preserve.add(rax);
preserve.add(regForRhs);
preserve.takeUnchecked(lhsOutput);
asMasm().PushRegsInMask(preserve);
// Shuffle input into place.
asMasm().moveRegPair(lhsOutput, rhs, rax, regForRhs);
if (oom()) {
return;
}
// Sign extend rax into rdx to make (rdx:rax): idiv/udiv are 128-bit.
if (isUnsigned) {
movq(ImmWord(0), rdx);
udivq(regForRhs);
} else {
cqo();
idivq(regForRhs);
}
Register result = isDiv ? rax : rdx;
if (result != lhsOutput) {
movq(result, lhsOutput);
}
asMasm().PopRegsInMask(preserve);
}
//{{{ check_macroassembler_style
// ===============================================================
// ABI function calls.
void MacroAssembler::setupUnalignedABICall(Register scratch) {
setupNativeABICall();
dynamicAlignment_ = true;
movq(rsp, scratch);
andq(Imm32(~(ABIStackAlignment - 1)), rsp);
push(scratch);
}
void MacroAssembler::callWithABIPre(uint32_t* stackAdjust, bool callFromWasm) {
MOZ_ASSERT(inCall_);
uint32_t stackForCall = abiArgs_.stackBytesConsumedSoFar();
if (dynamicAlignment_) {
// sizeof(intptr_t) accounts for the saved stack pointer pushed by
// setupUnalignedABICall.
stackForCall += ComputeByteAlignment(stackForCall + sizeof(intptr_t),
ABIStackAlignment);
} else {
uint32_t alignmentAtPrologue = callFromWasm ? sizeof(wasm::Frame) : 0;
stackForCall += ComputeByteAlignment(
stackForCall + framePushed() + alignmentAtPrologue, ABIStackAlignment);
}
*stackAdjust = stackForCall;
reserveStack(stackForCall);
// Position all arguments.
{
enoughMemory_ &= moveResolver_.resolve();
if (!enoughMemory_) {
return;
}
MoveEmitter emitter(*this);
emitter.emit(moveResolver_);
emitter.finish();
}
assertStackAlignment(ABIStackAlignment);
}
void MacroAssembler::callWithABIPost(uint32_t stackAdjust, ABIType result,
bool callFromWasm) {
freeStack(stackAdjust);
if (dynamicAlignment_) {
pop(rsp);
}
#ifdef DEBUG
MOZ_ASSERT(inCall_);
inCall_ = false;
#endif
}
static bool IsIntArgReg(Register reg) {
for (uint32_t i = 0; i < NumIntArgRegs; i++) {
if (IntArgRegs[i] == reg) {
return true;
}
}
return false;
}
void MacroAssembler::callWithABINoProfiler(Register fun, ABIType result) {
if (IsIntArgReg(fun)) {
// Callee register may be clobbered for an argument. Move the callee to
// r10, a volatile, non-argument register.
propagateOOM(moveResolver_.addMove(MoveOperand(fun), MoveOperand(r10),
MoveOp::GENERAL));
fun = r10;
}
MOZ_ASSERT(!IsIntArgReg(fun));
uint32_t stackAdjust;
callWithABIPre(&stackAdjust);
call(fun);
callWithABIPost(stackAdjust, result);
}
void MacroAssembler::callWithABINoProfiler(const Address& fun, ABIType result) {
Address safeFun = fun;
if (IsIntArgReg(safeFun.base)) {
// Callee register may be clobbered for an argument. Move the callee to
// r10, a volatile, non-argument register.
propagateOOM(moveResolver_.addMove(MoveOperand(fun.base), MoveOperand(r10),
MoveOp::GENERAL));
safeFun.base = r10;
}
MOZ_ASSERT(!IsIntArgReg(safeFun.base));
uint32_t stackAdjust;
callWithABIPre(&stackAdjust);
call(safeFun);
callWithABIPost(stackAdjust, result);
}
// ===============================================================
// Move instructions
void MacroAssembler::moveValue(const TypedOrValueRegister& src,
const ValueOperand& dest) {
if (src.hasValue()) {
moveValue(src.valueReg(), dest);
return;
}
MIRType type = src.type();
AnyRegister reg = src.typedReg();
if (!IsFloatingPointType(type)) {
boxValue(ValueTypeFromMIRType(type), reg.gpr(), dest.valueReg());
return;
}
ScratchDoubleScope scratch(*this);
FloatRegister freg = reg.fpu();
if (type == MIRType::Float32) {
convertFloat32ToDouble(freg, scratch);
freg = scratch;
}
boxDouble(freg, dest, freg);
}
void MacroAssembler::moveValue(const ValueOperand& src,
const ValueOperand& dest) {
if (src == dest) {
return;
}
movq(src.valueReg(), dest.valueReg());
}
void MacroAssembler::moveValue(const Value& src, const ValueOperand& dest) {
movWithPatch(ImmWord(src.asRawBits()), dest.valueReg());
writeDataRelocation(src);
}
// ===============================================================
// Arithmetic functions
void MacroAssembler::flexibleQuotientPtr(
Register rhs, Register srcDest, bool isUnsigned,
const LiveRegisterSet& volatileLiveRegs) {
flexibleDivMod64(rhs, srcDest, isUnsigned, /* isDiv= */ true);
}
void MacroAssembler::flexibleRemainderPtr(
Register rhs, Register srcDest, bool isUnsigned,
const LiveRegisterSet& volatileLiveRegs) {
flexibleDivMod64(rhs, srcDest, isUnsigned, /* isDiv= */ false);
}
// ===============================================================
// Branch functions
void MacroAssembler::loadStoreBuffer(Register ptr, Register buffer) {
if (ptr != buffer) {
movePtr(ptr, buffer);
}
andPtr(Imm32(int32_t(~gc::ChunkMask)), buffer);
loadPtr(Address(buffer, gc::ChunkStoreBufferOffset), buffer);
}
void MacroAssembler::branchPtrInNurseryChunk(Condition cond, Register ptr,
Register temp, Label* label) {
MOZ_ASSERT(cond == Assembler::Equal || cond == Assembler::NotEqual);
ScratchRegisterScope scratch(*this);
MOZ_ASSERT(ptr != temp);
MOZ_ASSERT(ptr != scratch);
movePtr(ptr, scratch);
andPtr(Imm32(int32_t(~gc::ChunkMask)), scratch);
branchPtr(InvertCondition(cond), Address(scratch, gc::ChunkStoreBufferOffset),
ImmWord(0), label);
}
template <typename T>
void MacroAssembler::branchValueIsNurseryCellImpl(Condition cond,
const T& value, Register temp,
Label* label) {
MOZ_ASSERT(cond == Assembler::Equal || cond == Assembler::NotEqual);
MOZ_ASSERT(temp != InvalidReg);
Label done;
branchTestGCThing(Assembler::NotEqual, value,
cond == Assembler::Equal ? &done : label);
getGCThingValueChunk(value, temp);
branchPtr(InvertCondition(cond), Address(temp, gc::ChunkStoreBufferOffset),
ImmWord(0), label);
bind(&done);
}
void MacroAssembler::branchValueIsNurseryCell(Condition cond,
const Address& address,
Register temp, Label* label) {
branchValueIsNurseryCellImpl(cond, address, temp, label);
}
void MacroAssembler::branchValueIsNurseryCell(Condition cond,
ValueOperand value, Register temp,
Label* label) {
branchValueIsNurseryCellImpl(cond, value, temp, label);
}
void MacroAssembler::branchTestValue(Condition cond, const ValueOperand& lhs,
const Value& rhs, Label* label) {
MOZ_ASSERT(cond == Equal || cond == NotEqual);
ScratchRegisterScope scratch(*this);
MOZ_ASSERT(lhs.valueReg() != scratch);
moveValue(rhs, ValueOperand(scratch));
cmpPtr(lhs.valueReg(), scratch);
j(cond, label);
}
// ========================================================================
// Memory access primitives.
template <typename T>
void MacroAssembler::storeUnboxedValue(const ConstantOrRegister& value,
MIRType valueType, const T& dest) {
MOZ_ASSERT(valueType < MIRType::Value);
if (valueType == MIRType::Double) {
boxDouble(value.reg().typedReg().fpu(), dest);
return;
}
if (value.constant()) {
storeValue(value.value(), dest);
} else {
storeValue(ValueTypeFromMIRType(valueType), value.reg().typedReg().gpr(),
dest);
}
}
template void MacroAssembler::storeUnboxedValue(const ConstantOrRegister& value,
MIRType valueType,
const Address& dest);
template void MacroAssembler::storeUnboxedValue(
const ConstantOrRegister& value, MIRType valueType,
const BaseObjectElementIndex& dest);
void MacroAssembler::PushBoxed(FloatRegister reg) {
subq(Imm32(sizeof(double)), StackPointer);
boxDouble(reg, Address(StackPointer, 0));
adjustFrame(sizeof(double));
}
// ========================================================================
// wasm support
void MacroAssembler::wasmLoad(const wasm::MemoryAccessDesc& access,
Operand srcAddr, AnyRegister out) {
// NOTE: the generated code must match the assembly code in gen_load in
// GenerateAtomicOperations.py
memoryBarrierBefore(access.sync());
MOZ_ASSERT_IF(
access.isZeroExtendSimd128Load(),
access.type() == Scalar::Float32 || access.type() == Scalar::Float64);
MOZ_ASSERT_IF(
access.isSplatSimd128Load(),
access.type() == Scalar::Uint8 || access.type() == Scalar::Uint16 ||
access.type() == Scalar::Float32 || access.type() == Scalar::Float64);
MOZ_ASSERT_IF(access.isWidenSimd128Load(), access.type() == Scalar::Float64);
switch (access.type()) {
case Scalar::Int8:
append(access, wasm::TrapMachineInsn::Load8,
FaultingCodeOffset(currentOffset()));
movsbl(srcAddr, out.gpr());
break;
case Scalar::Uint8:
append(access, wasm::TrapMachineInsn::Load8,
FaultingCodeOffset(currentOffset()));
if (access.isSplatSimd128Load()) {
vbroadcastb(srcAddr, out.fpu());
} else {
movzbl(srcAddr, out.gpr());
}
break;
case Scalar::Int16:
append(access, wasm::TrapMachineInsn::Load16,
FaultingCodeOffset(currentOffset()));
movswl(srcAddr, out.gpr());
break;
case Scalar::Uint16:
append(access, wasm::TrapMachineInsn::Load16,
FaultingCodeOffset(currentOffset()));
if (access.isSplatSimd128Load()) {
vbroadcastw(srcAddr, out.fpu());
} else {
movzwl(srcAddr, out.gpr());
}
break;
case Scalar::Int32:
case Scalar::Uint32:
append(access, wasm::TrapMachineInsn::Load32,
FaultingCodeOffset(currentOffset()));
movl(srcAddr, out.gpr());
break;
case Scalar::Float32:
append(access, wasm::TrapMachineInsn::Load32,
FaultingCodeOffset(currentOffset()));
if (access.isSplatSimd128Load()) {
vbroadcastss(srcAddr, out.fpu());
} else {
// vmovss does the right thing also for access.isZeroExtendSimd128Load()
vmovss(srcAddr, out.fpu());
}
break;
case Scalar::Float64:
append(access, wasm::TrapMachineInsn::Load64,
FaultingCodeOffset(currentOffset()));
if (access.isSplatSimd128Load()) {
vmovddup(srcAddr, out.fpu());
} else if (access.isWidenSimd128Load()) {
switch (access.widenSimdOp()) {
case wasm::SimdOp::V128Load8x8S:
vpmovsxbw(srcAddr, out.fpu());
break;
case wasm::SimdOp::V128Load8x8U:
vpmovzxbw(srcAddr, out.fpu());
break;
case wasm::SimdOp::V128Load16x4S:
vpmovsxwd(srcAddr, out.fpu());
break;
case wasm::SimdOp::V128Load16x4U:
vpmovzxwd(srcAddr, out.fpu());
break;
case wasm::SimdOp::V128Load32x2S:
vpmovsxdq(srcAddr, out.fpu());
break;
case wasm::SimdOp::V128Load32x2U:
vpmovzxdq(srcAddr, out.fpu());
break;