From c8dd557dde01cab79e22d8c338fc25a2018afd2f Mon Sep 17 00:00:00 2001
From: magumagu <magumagu9@gmail.com>
Date: Mon, 23 Jun 2014 22:17:45 -0700
Subject: [PATCH] JITIL: compare instruction folding.

---
 Source/Core/Core/PowerPC/Jit64IL/IR_X86.cpp |  2 +-
 Source/Core/Core/PowerPC/JitILCommon/IR.cpp | 53 +++++++++++++++++++++
 2 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/Source/Core/Core/PowerPC/Jit64IL/IR_X86.cpp b/Source/Core/Core/PowerPC/Jit64IL/IR_X86.cpp
index 94d61dc761..b1dba1c913 100644
--- a/Source/Core/Core/PowerPC/Jit64IL/IR_X86.cpp
+++ b/Source/Core/Core/PowerPC/Jit64IL/IR_X86.cpp
@@ -1721,7 +1721,7 @@ static void DoWriteCode(IRBuilder* ibuild, JitIL* Jit, u32 exitAddress) {
 					case ICmpNe: flag = CC_E; break;
 					case ICmpUgt: flag = CC_BE; break;
 					case ICmpUlt: flag = CC_AE; break;
-					case ICmpUge: flag = CC_L; break;
+					case ICmpUge: flag = CC_B; break;
 					case ICmpUle: flag = CC_A; break;
 					case ICmpSgt: flag = CC_LE; break;
 					case ICmpSlt: flag = CC_GE; break;
diff --git a/Source/Core/Core/PowerPC/JitILCommon/IR.cpp b/Source/Core/Core/PowerPC/JitILCommon/IR.cpp
index 4125b21d0b..90450ea652 100644
--- a/Source/Core/Core/PowerPC/JitILCommon/IR.cpp
+++ b/Source/Core/Core/PowerPC/JitILCommon/IR.cpp
@@ -356,6 +356,25 @@ InstLoc IRBuilder::FoldUOp(unsigned Opcode, InstLoc Op1, unsigned extra) {
 			return getOp1(Op1);
 		}
 	}
+	if (Opcode == FastCRGTSet)
+	{
+		if (getOpcode(*Op1) == ICmpCRSigned)
+			return EmitICmpSgt(getOp1(Op1), getOp2(Op1));
+		if (getOpcode(*Op1) == ICmpCRUnsigned)
+			return EmitICmpUgt(getOp1(Op1), getOp2(Op1));
+	}
+	if (Opcode == FastCRLTSet)
+	{
+		if (getOpcode(*Op1) == ICmpCRSigned)
+			return EmitICmpSlt(getOp1(Op1), getOp2(Op1));
+		if (getOpcode(*Op1) == ICmpCRUnsigned)
+			return EmitICmpUlt(getOp1(Op1), getOp2(Op1));
+	}
+	if (Opcode == FastCREQSet)
+	{
+		if (getOpcode(*Op1) == ICmpCRSigned || getOpcode(*Op1) == ICmpCRUnsigned)
+			return EmitICmpEq(getOp1(Op1), getOp2(Op1));
+	}
 
 	return EmitUOp(Opcode, Op1, extra);
 }
@@ -778,6 +797,35 @@ InstLoc IRBuilder::FoldOr(InstLoc Op1, InstLoc Op2) {
 	return EmitBiOp(Or, Op1, Op2);
 }
 
+static unsigned ICmpInverseOp(unsigned op)
+{
+	switch (op)
+	{
+	case ICmpEq:
+		return ICmpNe;
+	case ICmpNe:
+		return ICmpEq;
+	case ICmpUlt:
+		return ICmpUge;
+	case ICmpUgt:
+		return ICmpUle;
+	case ICmpUle:
+		return ICmpUgt;
+	case ICmpUge:
+		return ICmpUlt;
+	case ICmpSlt:
+		return ICmpSge;
+	case ICmpSgt:
+		return ICmpSle;
+	case ICmpSle:
+		return ICmpSgt;
+	case ICmpSge:
+		return ICmpSlt;
+	}
+	PanicAlert("Bad opcode");
+	return Nop;
+}
+
 InstLoc IRBuilder::FoldXor(InstLoc Op1, InstLoc Op2) {
 	simplifyCommutative(Xor, Op1, Op2);
 
@@ -794,6 +842,11 @@ InstLoc IRBuilder::FoldXor(InstLoc Op1, InstLoc Op2) {
 				       GetImmValue(getOp2(Op1));
 			return FoldXor(getOp1(Op1), EmitIntConst(RHS));
 		}
+		if (isICmp(getOpcode(*Op1)) && GetImmValue(Op2) == 1)
+		{
+			return FoldBiOp(ICmpInverseOp(getOpcode(*Op1)), getOp1(Op1), getOp2(Op1));
+
+		}
 	}
 
 	if (Op1 == Op2) return EmitIntConst(0);