From 87ca63699f26147f6e4c4fa879c97e69414cc844 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Fri, 20 Apr 2018 13:54:40 -0400
Subject: [PATCH] emit_x64_vector: Emit PMAXUD in EmitVectorMaxU32 on
 SSE4.1-capable CPUs

---
 src/backend_x64/emit_x64_vector.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/backend_x64/emit_x64_vector.cpp b/src/backend_x64/emit_x64_vector.cpp
index 8f360bfa..455f1f96 100644
--- a/src/backend_x64/emit_x64_vector.cpp
+++ b/src/backend_x64/emit_x64_vector.cpp
@@ -879,6 +879,11 @@ void EmitX64::EmitVectorMaxU16(EmitContext& ctx, IR::Inst* inst) {
 }
 
 void EmitX64::EmitVectorMaxU32(EmitContext& ctx, IR::Inst* inst) {
+    if (code.DoesCpuSupport(Xbyak::util::Cpu::tSSE41)) {
+        EmitVectorOperation(code, ctx, inst, &Xbyak::CodeGenerator::pmaxud);
+        return;
+    }
+
     EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u32, 4>& result, const std::array<u32, 4>& a, const std::array<u32, 4>& b){
         std::transform(a.begin(), a.end(), b.begin(), result.begin(), [](auto x, auto y) { return std::max(x, y); });
     });