From 3a8f0598c4a0cd21447c7c39bc6eee1d4d5b2cf6 Mon Sep 17 00:00:00 2001
From: "Unknown W. Brackets" <checkins@unknownbrackets.org>
Date: Sun, 10 Nov 2013 10:17:43 -0800
Subject: [PATCH] x86jit: Implement wsbh/wsbw.

---
 Core/MIPS/x86/CompALU.cpp | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/Core/MIPS/x86/CompALU.cpp b/Core/MIPS/x86/CompALU.cpp
index fe0f13d6bc..988e5f5fc3 100644
--- a/Core/MIPS/x86/CompALU.cpp
+++ b/Core/MIPS/x86/CompALU.cpp
@@ -782,19 +782,33 @@ namespace MIPSComp
 		if (rd == MIPS_REG_ZERO)
 			return;
 
-		DISABLE;
 		switch (op & 0x3ff)
 		{
 		case 0xA0: //wsbh
+			if (gpr.IsImmediate(rt)) {
+				u32 rtImm = gpr.GetImmediate32(rt);
+				gpr.SetImmediate32(rd, ((rtImm & 0xFF00FF00) >> 8) | ((rtImm & 0x00FF00FF) << 8));
+				break;
+			}
 			gpr.Lock(rd, rt);
 			gpr.MapReg(rd, rd == rt, true);
-			// Stub
+			if (rd != rt)
+				MOV(32, gpr.R(rd), gpr.R(rt));
+			// Swap both 16-bit halfwords by rotating afterward.
+			BSWAP(32, gpr.RX(rd));
+			ROR(32, gpr.R(rd), Imm8(16));
 			gpr.UnlockAll();
 			break;
 		case 0xE0: //wsbw
+			if (gpr.IsImmediate(rt)) {
+				gpr.SetImmediate32(rd, swap32(gpr.GetImmediate32(rt)));
+				break;
+			}
 			gpr.Lock(rd, rt);
 			gpr.MapReg(rd, rd == rt, true);
-			// Stub
+			if (rd != rt)
+				MOV(32, gpr.R(rd), gpr.R(rt));
+			BSWAP(32, gpr.RX(rd));
 			gpr.UnlockAll();
 			break;
 		default: