From 285fd22c3065917587cd6976e2f2d72dc49c165e Mon Sep 17 00:00:00 2001
From: MerryMage <MerryMage@users.noreply.github.com>
Date: Wed, 24 Jan 2018 17:11:13 +0000
Subject: [PATCH] IR: Add IR instruction VectorZeroUpper

---
 src/backend_x64/emit_x64_vector.cpp | 11 +++++++++++
 src/frontend/ir/ir_emitter.cpp      |  4 ++++
 src/frontend/ir/ir_emitter.h        |  1 +
 src/frontend/ir/opcodes.inc         |  1 +
 4 files changed, 17 insertions(+)

diff --git a/src/backend_x64/emit_x64_vector.cpp b/src/backend_x64/emit_x64_vector.cpp
index 8a468fbf..d3ef22bf 100644
--- a/src/backend_x64/emit_x64_vector.cpp
+++ b/src/backend_x64/emit_x64_vector.cpp
@@ -367,5 +367,16 @@ void EmitX64::EmitVectorBroadcast64(EmitContext& ctx, IR::Inst* inst) {
     ctx.reg_alloc.DefineValue(inst, a);
 }
 
+
+void EmitX64::EmitVectorZeroUpper(EmitContext& ctx, IR::Inst* inst) {
+    auto args = ctx.reg_alloc.GetArgumentInfo(inst);
+
+    Xbyak::Xmm a = ctx.reg_alloc.UseScratchXmm(args[0]);
+
+    code->movq(a, a); // TODO: !IsLastUse
+
+    ctx.reg_alloc.DefineValue(inst, a);
+}
+
 } // namespace BackendX64
 } // namespace Dynarmic
diff --git a/src/frontend/ir/ir_emitter.cpp b/src/frontend/ir/ir_emitter.cpp
index d29926d5..0f5f9ec4 100644
--- a/src/frontend/ir/ir_emitter.cpp
+++ b/src/frontend/ir/ir_emitter.cpp
@@ -761,6 +761,10 @@ U128 IREmitter::VectorPairedAdd64(const U128& a, const U128& b) {
     return Inst<U128>(Opcode::VectorPairedAdd64, a, b);
 }
 
+U128 IREmitter::VectorZeroUpper(const U128& a) {
+    return Inst<U128>(Opcode::VectorZeroUpper, a);
+}
+
 U32 IREmitter::FPAbs32(const U32& a) {
     return Inst<U32>(Opcode::FPAbs32, a);
 }
diff --git a/src/frontend/ir/ir_emitter.h b/src/frontend/ir/ir_emitter.h
index 39e0bda6..65fb871c 100644
--- a/src/frontend/ir/ir_emitter.h
+++ b/src/frontend/ir/ir_emitter.h
@@ -204,6 +204,7 @@ public:
     U128 VectorPairedAdd16(const U128& a, const U128& b);
     U128 VectorPairedAdd32(const U128& a, const U128& b);
     U128 VectorPairedAdd64(const U128& a, const U128& b);
+    U128 VectorZeroUpper(const U128& a);
 
     U32 FPAbs32(const U32& a);
     U64 FPAbs64(const U64& a);
diff --git a/src/frontend/ir/opcodes.inc b/src/frontend/ir/opcodes.inc
index 20c40040..67ef1569 100644
--- a/src/frontend/ir/opcodes.inc
+++ b/src/frontend/ir/opcodes.inc
@@ -189,6 +189,7 @@ OPCODE(VectorPairedAdd8,        T::U128,        T::U128,        T::U128
 OPCODE(VectorPairedAdd16,       T::U128,        T::U128,        T::U128                         )
 OPCODE(VectorPairedAdd32,       T::U128,        T::U128,        T::U128                         )
 OPCODE(VectorPairedAdd64,       T::U128,        T::U128,        T::U128                         )
+OPCODE(VectorZeroUpper,         T::U128,        T::U128                                         )
 
 // Floating-point operations
 OPCODE(FPAbs32,                 T::U32,         T::U32                                          )