From 936d80b21464c37bc932b4f2db011aaa1ea8d4d7 Mon Sep 17 00:00:00 2001
From: raven02 <jacky.kktsui@yahoo.com.hk>
Date: Thu, 20 Dec 2012 21:39:10 +0800
Subject: [PATCH] Implement Vscmp

---
 Core/MIPS/MIPSIntVFPU.cpp | 27 ++++++++++++++++++++++++++-
 Core/MIPS/MIPSIntVFPU.h   |  1 +
 Core/MIPS/MIPSTables.cpp  |  2 +-
 3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/Core/MIPS/MIPSIntVFPU.cpp b/Core/MIPS/MIPSIntVFPU.cpp
index b3045b9a4b..1cb7fc4167 100644
--- a/Core/MIPS/MIPSIntVFPU.cpp
+++ b/Core/MIPS/MIPSIntVFPU.cpp
@@ -1321,7 +1321,32 @@ namespace MIPSInt
 		PC += 4;
 		EatPrefixes();
 	}
-
+	
+	void Int_Vscmp(u32 op) {
+		int vt = _VT;
+		int vs = _VS;
+		int vd = _VD;
+		VectorSize sz = GetVecSize(op);
+		float s[4];
+		float t[4];
+		float d[4];
+		ReadVector(s, sz, vs);
+		ApplySwizzleS(s, sz);
+		ReadVector(t, sz, vt);
+		ApplySwizzleT(t, sz);
+		int n = GetNumVectorElements(sz);
+		for (int i = 0; i < n ; i++) {
+			int a=s[i] - t[i];
+			if (a > 0) d[i]=1;
+			else if (a < 0) d[i]=-1;
+			else d[i]=0;
+		}
+		ApplyPrefixD(d, sz);
+		WriteVector(d, sz, vd);
+		PC += 4;
+		EatPrefixes();
+	}
+	
 	void Int_Vsge(u32 op) {
 		int vt = _VT;
 		int vs = _VS;
diff --git a/Core/MIPS/MIPSIntVFPU.h b/Core/MIPS/MIPSIntVFPU.h
index 50e7229366..73165eb2fe 100644
--- a/Core/MIPS/MIPSIntVFPU.h
+++ b/Core/MIPS/MIPSIntVFPU.h
@@ -49,6 +49,7 @@ namespace MIPSInt
 	void Int_Vidt(u32 op);
 	void Int_Vcmp(u32 op);
 	void Int_Vminmax(u32 op);
+	void Int_Vscmp(u32 op);
 	void Int_Vcrs(u32 op);
 	void Int_Vcmov(u32 op);
 	void Int_CrossQuat(u32 op);
diff --git a/Core/MIPS/MIPSTables.cpp b/Core/MIPS/MIPSTables.cpp
index 67d9b70e92..c73bceaf07 100644
--- a/Core/MIPS/MIPSTables.cpp
+++ b/Core/MIPS/MIPSTables.cpp
@@ -506,7 +506,7 @@ MIPSInstruction tableVFPU3[8] = //011011 xxx
 	INSTR("vmin",&Jit::Comp_Generic, Dis_VectorSet3, Int_Vminmax, IS_VFPU),
 	INSTR("vmax",&Jit::Comp_Generic, Dis_VectorSet3, Int_Vminmax, IS_VFPU), 
 	{-2}, 
-	INSTR("vscmp",&Jit::Comp_Generic, Dis_Generic, 0, IS_VFPU), 
+	INSTR("vscmp",&Jit::Comp_Generic, Dis_VectorSet3, Int_Vscmp, IS_VFPU), 
 	INSTR("vsge",&Jit::Comp_Generic, Dis_VectorSet3, Int_Vsge, IS_VFPU), 
 	INSTR("vslt",&Jit::Comp_Generic, Dis_VectorSet3, Int_Vslt, IS_VFPU),
 };