From 24f6c98a553467427d035c6c36df57ca889142e3 Mon Sep 17 00:00:00 2001
From: Ryan Houdek <Sonicadvance1@gmail.com>
Date: Wed, 10 Sep 2014 17:52:54 -0500
Subject: [PATCH] Add sign extending aliases to the ARM64Emitter.

---
 Source/Core/Common/Arm64Emitter.cpp | 14 ++++++++++++++
 Source/Core/Common/Arm64Emitter.h   |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/Source/Core/Common/Arm64Emitter.cpp b/Source/Core/Common/Arm64Emitter.cpp
index d0a0352df2..3db7b2587a 100644
--- a/Source/Core/Common/Arm64Emitter.cpp
+++ b/Source/Core/Common/Arm64Emitter.cpp
@@ -1081,6 +1081,20 @@ void ARM64XEmitter::UBFM(ARM64Reg Rd, ARM64Reg Rn, u32 immr, u32 imms)
 {
 	EncodeBitfieldMOVInst(2, Rd, Rn, immr, imms);
 }
+void ARM64XEmitter::SXTB(ARM64Reg Rd, ARM64Reg Rn)
+{
+	SBFM(Rd, Rn, 0, 7);
+}
+void ARM64XEmitter::SXTH(ARM64Reg Rd, ARM64Reg Rn)
+{
+	SBFM(Rd, Rn, 0, 15);
+}
+void ARM64XEmitter::SXTW(ARM64Reg Rd, ARM64Reg Rn)
+{
+	_assert_msg_(DYNA_REC, Is64Bit(Rd), "%s requires 64bit register as destination", __FUNCTION__);
+
+	SBFM(Rd, Rn, 0, 31);
+}
 
 // Load Register (Literal)
 void ARM64XEmitter::LDR(ARM64Reg Rt, u32 imm)
diff --git a/Source/Core/Common/Arm64Emitter.h b/Source/Core/Common/Arm64Emitter.h
index 145081f9ff..a60b453fdc 100644
--- a/Source/Core/Common/Arm64Emitter.h
+++ b/Source/Core/Common/Arm64Emitter.h
@@ -477,6 +477,9 @@ public:
 	void BFM(ARM64Reg Rd, ARM64Reg Rn, u32 immr, u32 imms);
 	void SBFM(ARM64Reg Rd, ARM64Reg Rn, u32 immr, u32 imms);
 	void UBFM(ARM64Reg Rd, ARM64Reg Rn, u32 immr, u32 imms);
+	void SXTB(ARM64Reg Rd, ARM64Reg Rn);
+	void SXTH(ARM64Reg Rd, ARM64Reg Rn);
+	void SXTW(ARM64Reg Rd, ARM64Reg Rn);
 
 	// Load Register (Literal)
 	void LDR(ARM64Reg Rt, u32 imm);