From 14df2f7251002892436b3e2dafb8db19be1624d9 Mon Sep 17 00:00:00 2001
From: Georg Lehmann <dadschoorse@gmail.com>
Date: Fri, 21 Jan 2022 00:41:08 +0100
Subject: [PATCH] [d3d9] Enable strict float emulation by default for new radv.

---
 dxvk.conf                 |  2 +-
 src/d3d9/d3d9_options.cpp | 14 ++++++++++----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/dxvk.conf b/dxvk.conf
index 6863d05a..2b68daf7 100644
--- a/dxvk.conf
+++ b/dxvk.conf
@@ -343,7 +343,7 @@
 # - Strict: Use a slower but more correct approach. Necessary for some games
 # - Auto: DXVK will pick automatically
 
-# d3d9.floatEmulation = True
+# d3d9.floatEmulation = Auto
 
 
 # Enable dialog box mode
diff --git a/src/d3d9/d3d9_options.cpp b/src/d3d9/d3d9_options.cpp
index 33f53058..a04100ad 100644
--- a/src/d3d9/d3d9_options.cpp
+++ b/src/d3d9/d3d9_options.cpp
@@ -81,13 +81,19 @@ namespace dxvk {
                             0, 0);
     applyTristate(this->generalHazards, config.getOption<Tristate>("d3d9.generalHazards", Tristate::Auto));
 
-    std::string floatEmulation = Config::toLower(config.getOption<std::string>("d3d9.floatEmulation", "true"));
+    std::string floatEmulation = Config::toLower(config.getOption<std::string>("d3d9.floatEmulation", "auto"));
     if (floatEmulation == "strict") {
-      d3d9FloatEmulation  = D3D9FloatEmulation::Strict;
+      d3d9FloatEmulation = D3D9FloatEmulation::Strict;
     } else if (floatEmulation == "false") {
-      d3d9FloatEmulation  = D3D9FloatEmulation::Disabled;
+      d3d9FloatEmulation = D3D9FloatEmulation::Disabled;
+    } else if (floatEmulation == "true") {
+      d3d9FloatEmulation = D3D9FloatEmulation::Enabled;
     } else {
-      d3d9FloatEmulation  = D3D9FloatEmulation::Enabled;
+      bool hasMulz = adapter->matchesDriver(DxvkGpuVendor::Amd,
+                                            VK_DRIVER_ID_MESA_RADV,
+                                            VK_MAKE_VERSION(21, 99, 99),
+                                            0);
+      d3d9FloatEmulation = hasMulz ? D3D9FloatEmulation::Strict : D3D9FloatEmulation::Enabled;
     }
   }