AssemblyHelpers::Jump AssemblyHelpers::emitExceptionCheck(ExceptionCheckKind kind)
{
callExceptionFuzz();
#if USE(JSVALUE64)
return branchTest64(kind == NormalExceptionCheck ? NonZero : Zero, AbsoluteAddress(vm()->addressOfException()));
#elif USE(JSVALUE32_64)
return branch32(kind == NormalExceptionCheck ? NotEqual : Equal, AbsoluteAddress(reinterpret_cast<char*>(vm()->addressOfException()) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
#endif
}
AssemblyHelpers::Jump AssemblyHelpers::emitNonPatchableExceptionCheck()
{
callExceptionFuzz();
Jump result;
#if USE(JSVALUE64)
result = branchTest64(NonZero, AbsoluteAddress(vm()->addressOfException()));
#elif USE(JSVALUE32_64)
result = branch32(NotEqual, AbsoluteAddress(vm()->addressOfException()), TrustedImm32(0));
#endif
return result;
}
AssemblyHelpers::Jump AssemblyHelpers::emitExceptionCheck(ExceptionCheckKind kind, ExceptionJumpWidth width)
{
callExceptionFuzz();
if (width == FarJumpWidth)
kind = (kind == NormalExceptionCheck ? InvertedExceptionCheck : NormalExceptionCheck);
Jump result;
#if USE(JSVALUE64)
result = branchTest64(kind == NormalExceptionCheck ? NonZero : Zero, AbsoluteAddress(vm()->addressOfException()));
#elif USE(JSVALUE32_64)
result = branch32(kind == NormalExceptionCheck ? NotEqual : Equal, AbsoluteAddress(vm()->addressOfException()), TrustedImm32(0));
#endif
if (width == NormalJumpWidth)
return result;
PatchableJump realJump = patchableJump();
result.link(this);
return realJump.m_jump;
}