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- allocate VMFrame on the stack for simple functions with no strings

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This commit is contained in:
Magnus Norddahl 2018-10-09 05:19:29 +02:00
parent bee3a964ae
commit f0d9b49099
1 changed files with 82 additions and 38 deletions
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46
src/scripting/vm/jit.cpp
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@ -189,6 +189,47 @@ void JitCompiler::Setup()
int offsetD = offsetA + (int)(sfunc->NumRegA * sizeof(void*));
offsetExtra = (offsetD + (int)(sfunc->NumRegD * sizeof(int32_t)) + 15) & ~15;
vmframe = cc.newIntPtr("vmframe");
if (sfunc->SpecialInits.Size() == 0 && sfunc->NumRegS == 0)
{
// This is a simple frame with no constructors or destructors. Allocate it on the stack ourselves.
//auto vmstack = cc.newStack(offsetExtra + sfunc->ExtraSpace, 16); // To do: fill in params without VMFillParams
auto vmstack = cc.newStack(sfunc->StackSize, 16);
cc.lea(vmframe, vmstack);
auto sfuncptr = cc.newIntPtr();
cc.mov(sfuncptr, imm_ptr(sfunc));
if (cc.is64Bit())
cc.mov(x86::qword_ptr(vmframe, offsetof(VMFrame, Func)), sfuncptr);
else
cc.mov(x86::dword_ptr(vmframe, offsetof(VMFrame, Func)), sfuncptr);
cc.mov(x86::byte_ptr(vmframe, offsetof(VMFrame, NumRegD)), sfunc->NumRegD);
cc.mov(x86::byte_ptr(vmframe, offsetof(VMFrame, NumRegF)), sfunc->NumRegF);
cc.mov(x86::byte_ptr(vmframe, offsetof(VMFrame, NumRegS)), sfunc->NumRegS);
cc.mov(x86::byte_ptr(vmframe, offsetof(VMFrame, NumRegA)), sfunc->NumRegA);
cc.mov(x86::word_ptr(vmframe, offsetof(VMFrame, MaxParam)), sfunc->MaxParam);
cc.mov(x86::word_ptr(vmframe, offsetof(VMFrame, NumParam)), 0);
auto fillParams = CreateCall<void, VMFrame *, VMValue *, int, JitExceptionInfo *>([](VMFrame *newf, VMValue *args, int numargs, JitExceptionInfo *exceptinfo) {
try
{
VMFillParams(args, newf, numargs);
}
catch (...)
{
exceptinfo->reason = X_OTHER;
exceptinfo->cppException = std::current_exception();
}
});
fillParams->setArg(0, vmframe);
fillParams->setArg(1, args);
fillParams->setArg(2, numargs);
fillParams->setArg(3, exceptInfo);
EmitCheckForException();
}
else
{
stack = cc.newIntPtr("stack");
auto allocFrame = CreateCall<VMFrameStack *, VMScriptFunction *, VMValue *, int, JitExceptionInfo *>([](VMScriptFunction *func, VMValue *args, int numargs, JitExceptionInfo *exceptinfo) -> VMFrameStack* {
try
@ -212,9 +253,9 @@ void JitCompiler::Setup()
allocFrame->setArg(3, exceptInfo);
EmitCheckForException();
vmframe = cc.newIntPtr();
cc.mov(vmframe, x86::ptr(stack)); // stack->Blocks
cc.mov(vmframe, x86::ptr(vmframe, VMFrameStack::OffsetLastFrame())); // Blocks->LastFrame
}
cc.lea(params, x86::ptr(vmframe, offsetParams));
cc.lea(frameF, x86::ptr(vmframe, offsetF));
@ -261,6 +302,8 @@ void JitCompiler::Setup()
void JitCompiler::EmitPopFrame()
{
if (sfunc->SpecialInits.Size() != 0 || sfunc->NumRegS != 0)
{
auto popFrame = CreateCall<void, VMFrameStack *, JitExceptionInfo *>([](VMFrameStack *stack, JitExceptionInfo *exceptinfo) {
try
{
@ -274,6 +317,7 @@ void JitCompiler::EmitPopFrame()
});
popFrame->setArg(0, stack);
popFrame->setArg(1, exceptInfo);
}
}
void JitCompiler::EmitNullPointerThrow(int index, EVMAbortException reason)