OrdinaryMagician/vkdoom_m
OrdinaryMagician/vkdoom_m
1
Fork 0
Code Activity

- only allocate stack space for vmframe and call returns when we need them

Browse source
This commit is contained in:
Magnus Norddahl 2018-11-18 13:49:19 +01:00
commit a8a9ec98f3
3 changed files with 51 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

42
src/scripting/vm/jit.cpp
View file

@ -436,6 +436,37 @@ void JitCompiler::BindLabels()
cc.setCursor(cursor);
}
void JitCompiler::CheckVMFrame()
{
if (!vmframeAllocated)
{
auto cursor = cc.getCursor();
cc.setCursor(vmframeCursor);
auto vmstack = cc.newStack(sfunc->StackSize, 16, "vmstack");
vmframe = cc.newIntPtr("vmframe");
cc.lea(vmframe, vmstack);
cc.setCursor(cursor);
vmframeAllocated = true;
}
}
asmjit::X86Gp JitCompiler::GetCallReturns()
{
if (!callReturnsAllocated)
{
auto cursor = cc.getCursor();
cc.setCursor(callReturnsCursor);
auto stackalloc = cc.newStack(sizeof(VMReturn) * MAX_RETURNS, alignof(VMReturn), "stackalloc");
callReturns = cc.newIntPtr("callReturns");
cc.lea(callReturns, stackalloc);
cc.setCursor(cursor);
callReturnsAllocated = true;
}
return callReturns;
}
void JitCompiler::Setup()
{
using namespace asmjit;
@ -466,9 +497,7 @@ void JitCompiler::Setup()
cc.setArg(3, ret);
cc.setArg(4, numret);
auto stackalloc = cc.newStack(sizeof(VMReturn) * MAX_RETURNS, alignof(VMReturn), "stackalloc");
callReturns = cc.newIntPtr("callReturns");
cc.lea(callReturns, stackalloc);
callReturnsCursor = cc.getCursor();
konstd = sfunc->KonstD;
konstf = sfunc->KonstF;
@ -492,8 +521,6 @@ void JitCompiler::SetupFrame()
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)
{
SetupSimpleFrame();
@ -510,8 +537,7 @@ void JitCompiler::SetupSimpleFrame()
// This is a simple frame with no constructors or destructors. Allocate it on the stack ourselves.
auto vmstack = cc.newStack(sfunc->StackSize, 16, "vmstack");
cc.lea(vmframe, vmstack);
vmframeCursor = cc.getCursor();
int argsPos = 0;
int regd = 0, regf = 0, rega = 0;
@ -592,8 +618,10 @@ void JitCompiler::SetupFullVMFrame()
allocFrame->setArg(1, args);
allocFrame->setArg(2, numargs);
vmframe = cc.newIntPtr("vmframe");
cc.mov(vmframe, x86::ptr(stack)); // stack->Blocks
cc.mov(vmframe, x86::ptr(vmframe, VMFrameStack::OffsetLastFrame())); // Blocks->LastFrame
vmframeAllocated = true;
for (int i = 0; i < sfunc->NumRegD; i++)
cc.mov(regD[i], x86::dword_ptr(vmframe, offsetD + i * sizeof(int32_t)));