zdoom
/
gzdoom
mirror of https://github.com/ZDoom/gzdoom.git
0
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

- fix wrong offsets

This commit is contained in:
Magnus Norddahl 2018-11-15 22:40:12 +01:00
parent 0394dc56b7
commit 5ef2175c38
1 changed files with 12 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
src/scripting/vm/jit.cpp
View File

@ -590,17 +590,21 @@ void JitCompiler::Setup()
cc.mov(x86::word_ptr(vmframe, offsetof(VMFrame, NumParam)), 0);
// Zero initialize the variables (retardedly stupid to do here - should be done by the compiler backend!!)
unsigned int clearoffset = (unsigned int)offsetof(VMFrame, NumParam) + 2;
unsigned int sselength = (sfunc->StackSize - clearoffset) / 4;
auto zerosse = newTempXmmPd();
cc.xorpd(zerosse, zerosse);
for (unsigned int i = 0; i < sselength * 4; i += 4)
cc.movupd(x86::ptr(vmframe, clearoffset + i), zerosse);
if (clearoffset + sselength * 4 < sfunc->StackSize)
unsigned int clearbegin = (unsigned int)offsetof(VMFrame, NumParam) + 2;
unsigned int clearend = sfunc->StackSize;
unsigned int sseend = clearbegin + (clearend - clearbegin) / 16 * 16;
if (clearbegin < sseend)
{
auto zerosse = newTempXmmPd();
cc.xorpd(zerosse, zerosse);
for (unsigned int i = clearbegin; i < sseend; i += 16)
cc.movupd(x86::ptr(vmframe, i), zerosse);
}
if (sseend < clearend)
{
auto zero32 = newTempInt32();
cc.xor_(zero32, zero32);
for (unsigned int i = clearoffset + sselength * 4; i < sfunc->StackSize; i++)
for (unsigned int i = sseend; i < clearend; i++)
cc.mov(asmjit::x86::byte_ptr(vmframe, i), zero32.r8Lo());
}