From f575c2c3be88fa9b7d9327c8a4e90ca84d2bcf30 Mon Sep 17 00:00:00 2001
From: calc84maniac <calc84maniac@gmail.com>
Date: Mon, 2 Jan 2012 18:00:28 -0500
Subject: [PATCH] srwx and slwx optimizations

---
 .../Core/Src/PowerPC/Jit64/Jit_Integer.cpp    | 54 +++++++++++--------
 1 file changed, 32 insertions(+), 22 deletions(-)

diff --git a/Source/Core/Core/Src/PowerPC/Jit64/Jit_Integer.cpp b/Source/Core/Core/Src/PowerPC/Jit64/Jit_Integer.cpp
index c2726fc7de..b0be8517c7 100644
--- a/Source/Core/Core/Src/PowerPC/Jit64/Jit_Integer.cpp
+++ b/Source/Core/Core/Src/PowerPC/Jit64/Jit_Integer.cpp
@@ -1652,28 +1652,33 @@ void Jit64::srwx(UGeckoInstruction inst)
 	{
 		u32 amount = (u32)gpr.R(b).offset;
 		gpr.SetImmediate32(a, (amount & 0x20) ? 0 : ((u32)gpr.R(s).offset >> (amount & 0x1f)));
+		if (inst.Rc) 
+		{
+			ComputeRC(gpr.R(a));
+		}
 	}
 	else
 	{
 		gpr.FlushLockX(ECX);
 		gpr.Lock(a, b, s);
-		gpr.BindToRegister(a, a == s || a == b || s == b, true);
+		gpr.BindToRegister(a, true, true);
 		MOV(32, R(ECX), gpr.R(b));
-		XOR(32, R(EAX), R(EAX));
 		TEST(32, R(ECX), Imm32(32));
-		FixupBranch branch = J_CC(CC_NZ);
-		MOV(32, R(EAX), gpr.R(s));
-		SHR(32, R(EAX), R(ECX));
+		if (a != s)
+		{
+			MOV(32, gpr.R(a), gpr.R(s));
+		}
+		FixupBranch branch = J_CC(CC_Z);
+		XOR(32, gpr.R(a), gpr.R(a));
 		SetJumpTarget(branch);
-		MOV(32, gpr.R(a), R(EAX));
+		SHR(32, gpr.R(a), R(ECX));
+		if (inst.Rc)
+		{
+			GenerateRC();
+		}
 		gpr.UnlockAll();
 		gpr.UnlockAllX();
 	}
-
-	if (inst.Rc) 
-	{
-		ComputeRC(gpr.R(a));
-	}
 }
 
 void Jit64::slwx(UGeckoInstruction inst)
@@ -1688,28 +1693,33 @@ void Jit64::slwx(UGeckoInstruction inst)
 	{
 		u32 amount = (u32)gpr.R(b).offset;
 		gpr.SetImmediate32(a, (amount & 0x20) ? 0 : (u32)gpr.R(s).offset << amount);
+		if (inst.Rc) 
+		{
+			ComputeRC(gpr.R(a));
+		}
 	}
 	else
 	{
 		gpr.FlushLockX(ECX);
 		gpr.Lock(a, b, s);
-		gpr.BindToRegister(a, a == s || a == b || s == b, true);
+		gpr.BindToRegister(a, true, true);
 		MOV(32, R(ECX), gpr.R(b));
-		XOR(32, R(EAX), R(EAX));
 		TEST(32, R(ECX), Imm32(32));
-		FixupBranch branch = J_CC(CC_NZ);
-		MOV(32, R(EAX), gpr.R(s));
-		SHL(32, R(EAX), R(ECX));
+		if (a != s)
+		{
+			MOV(32, gpr.R(a), gpr.R(s));
+		}
+		FixupBranch branch = J_CC(CC_Z);
+		XOR(32, gpr.R(a), gpr.R(a));
 		SetJumpTarget(branch);
-		MOV(32, gpr.R(a), R(EAX));
+		SHL(32, gpr.R(a), R(ECX));
+		if (inst.Rc) 
+		{
+			GenerateRC();
+		}
 		gpr.UnlockAll();
 		gpr.UnlockAllX();
 	}
-
-	if (inst.Rc) 
-	{
-		ComputeRC(gpr.R(a));
-	}
 }
 
 void Jit64::srawx(UGeckoInstruction inst)