lux/yuzu
1
0
Fork 0
mirror of https://git.h3cjp.net/H3cJP/yuzu.git synced 2024-12-15 15:25:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

MacroInterpreter: Avoid left shifting negative values.

Browse source 
The branch target is signed, so multiply by 4 instead of left shifting by 2
This commit is contained in:
Subv 2018-07-30 20:09:49 -05:00
parent e119e17d18
commit 8191273a3d
2 changed files with 6 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/video_core/macro_interpreter.cpp
View file

@ -102,11 +102,11 @@ bool MacroInterpreter::Step(const std::vector<u32>& code, bool is_delay_slot) {
if (taken) { if (taken) {
// Ignore the delay slot if the branch has the annul bit. // Ignore the delay slot if the branch has the annul bit.
if (opcode.branch_annul) { if (opcode.branch_annul) {
pc = base_address + (opcode.immediate << 2); pc = base_address + opcode.GetBranchTarget();
return true; return true;
} }
delayed_pc = base_address + (opcode.immediate << 2); delayed_pc = base_address + opcode.GetBranchTarget();
// Execute one more instruction due to the delay slot. // Execute one more instruction due to the delay slot.
return Step(code, true); return Step(code, true);
} }

4
src/video_core/macro_interpreter.h
View file

@ -91,6 +91,10 @@ private:
u32 GetBitfieldMask() const { u32 GetBitfieldMask() const {
return (1 << bf_size) - 1; return (1 << bf_size) - 1;
} }
s32 GetBranchTarget() const {
return static_cast<s32>(immediate * sizeof(u32));
}
}; };
union MethodAddress { union MethodAddress {