[d3d11] Introduce option to disable float controls

And disable for SotTR since it introduces rendering issues.

src/d3d11/d3d11_options.cpp

@@ -15,6 +15,7 @@ namespace dxvk {
     this->maxTessFactor         = config.getOption<int32_t>("d3d11.maxTessFactor", 0);
     this->samplerAnisotropy     = config.getOption<int32_t>("d3d11.samplerAnisotropy", -1);
     this->invariantPosition     = config.getOption<bool>("d3d11.invariantPosition", true);
+    this->floatControls         = config.getOption<bool>("d3d11.floatControls", true);
     this->deferSurfaceCreation  = config.getOption<bool>("dxgi.deferSurfaceCreation", false);
     this->numBackBuffers        = config.getOption<int32_t>("dxgi.numBackBuffers", 0);
     this->maxFrameLatency       = config.getOption<int32_t>("dxgi.maxFrameLatency", 0);

src/d3d11/d3d11_options.h

@@ -64,6 +64,9 @@ namespace dxvk {
     /// Declare vertex positions in shaders as invariant
     bool invariantPosition;
 
+    /// Enable float control bits
+    bool floatControls;
+
     /// Back buffer count for the Vulkan swap chain.
     /// Overrides DXGI_SWAP_CHAIN_DESC::BufferCount.
     int32_t numBackBuffers;

src/dxbc/dxbc_options.cpp

@@ -59,6 +59,7 @@ namespace dxvk {
     applyTristate(useSubgroupOpsForEarlyDiscard, device->config().useEarlyDiscard);
 
     // Figure out float control flags to match D3D11 rules
+    if (options.floatControls) {
       if (devInfo.khrShaderFloatControls.shaderSignedZeroInfNanPreserveFloat32)
         floatControl.set(DxbcFloatControlFlag::PreserveNan32);
       if (devInfo.khrShaderFloatControls.shaderSignedZeroInfNanPreserveFloat64)
@@ -70,6 +71,7 @@ namespace dxvk {
         if (devInfo.khrShaderFloatControls.shaderDenormPreserveFloat64)
           floatControl.set(DxbcFloatControlFlag::DenormPreserve64);
       }
+    }
 
     if (!devInfo.khrShaderFloatControls.shaderSignedZeroInfNanPreserveFloat32
      || adapter->matchesDriver(DxvkGpuVendor::Amd, VK_DRIVER_ID_MESA_RADV_KHR, 0, VK_MAKE_VERSION(20, 3, 0)))

src/util/config/config.cpp

@@ -200,6 +200,7 @@ namespace dxvk {
      * position breaks character rendering on NV  */
     { R"(\\SOTTR\.exe$)", {{
       { "d3d11.invariantPosition",          "False" },
+      { "d3d11.floatControls",              "False" },
     }} },
 
     /**********************************************/