From fd511a689f5acb9cb563f6f267da836e7ad4f37b Mon Sep 17 00:00:00 2001
From: JosJuice <josjuice@gmail.com>
Date: Mon, 14 Feb 2022 19:03:34 +0100
Subject: [PATCH] Jit: Skip redundant flushes
This makes codegen faster (by perhaps 10-20% in the case of Jit64,
I didn't measure too closely), which helps speed up NBA Live 2005
a little. But the game still has serious performance issues.
---
Source/Core/Core/PowerPC/Jit64/Jit.cpp | 4 ++--
Source/Core/Core/PowerPC/JitArm64/Jit.cpp | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/Source/Core/Core/PowerPC/Jit64/Jit.cpp b/Source/Core/Core/PowerPC/Jit64/Jit.cpp
index 903bc826fb..f43d25855f 100644
--- a/Source/Core/Core/PowerPC/Jit64/Jit.cpp
+++ b/Source/Core/Core/PowerPC/Jit64/Jit.cpp
@@ -1184,8 +1184,8 @@ bool Jit64::DoJit(u32 em_address, JitBlock* b, u32 nextPC)
gpr.Discard(op.gprDiscardable);
fpr.Discard(op.fprDiscardable);
}
- gpr.Flush(~op.gprInUse);
- fpr.Flush(~op.fprInUse);
+ gpr.Flush(~op.gprInUse & (op.regsIn | op.regsOut));
+ fpr.Flush(~op.fprInUse & (op.fregsIn | op.GetFregsOut()));
if (opinfo->flags & FL_LOADSTORE)
++js.numLoadStoreInst;
diff --git a/Source/Core/Core/PowerPC/JitArm64/Jit.cpp b/Source/Core/Core/PowerPC/JitArm64/Jit.cpp
index 113c8e0043..3be81d2c71 100644
--- a/Source/Core/Core/PowerPC/JitArm64/Jit.cpp
+++ b/Source/Core/Core/PowerPC/JitArm64/Jit.cpp
@@ -971,8 +971,8 @@ bool JitArm64::DoJit(u32 em_address, JitBlock* b, u32 nextPC)
gpr.DiscardRegisters(op.gprDiscardable);
fpr.DiscardRegisters(op.fprDiscardable);
}
- gpr.StoreRegisters(~op.gprInUse);
- fpr.StoreRegisters(~op.fprInUse);
+ gpr.StoreRegisters(~op.gprInUse & (op.regsIn | op.regsOut));
+ fpr.StoreRegisters(~op.fprInUse & (op.fregsIn | op.GetFregsOut()));
if (opinfo->flags & FL_LOADSTORE)
++js.numLoadStoreInst;