From fd757751974cb70e9e3b4d9cc4b27290fea6078f Mon Sep 17 00:00:00 2001
From: Joshua Ashton <joshua@froggi.es>
Date: Thu, 7 May 2020 13:05:36 +0100
Subject: [PATCH] [d3d9] Use unordered comparison opposed to isnan

Results in better codegen
---
 src/d3d9/d3d9_sampler.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/d3d9/d3d9_sampler.h b/src/d3d9/d3d9_sampler.h
index a77ab901d..26fec0f6f 100644
--- a/src/d3d9/d3d9_sampler.h
+++ b/src/d3d9/d3d9_sampler.h
@@ -47,8 +47,8 @@ namespace dxvk {
       key.MipmapLodBias = 0;
     }
     else {
-      // Games also pass NAN/INF here, this accounts for that.
-      if (unlikely(std::isnan(key.MipmapLodBias)))
+      // Games also pass NAN here, this accounts for that.
+      if (unlikely(key.MipmapLodBias != key.MipmapLodBias))
         key.MipmapLodBias = 0.0f;
 
       // Clamp between -15.0f and 15.0f, matching mip limits of d3d9.