[dxbc] Enable SPV_NV_raw_access_chains

src/dxbc/dxbc_compiler.cpp

@@ -1230,6 +1230,14 @@ namespace dxvk {
     }
 
     m_bindings.push_back(binding);
+
+    // If supported, we'll be using raw access chains to access this
+    if (!m_hasRawAccessChains && m_moduleInfo.options.supportsRawAccessChains) {
+      m_module.enableExtension("SPV_NV_raw_access_chains");
+      m_module.enableCapability(spv::CapabilityRawAccessChainsNV);
+
+      m_hasRawAccessChains = true;
+    }
   }
   
   

src/dxbc/dxbc_compiler.h

@@ -512,6 +512,7 @@ namespace dxvk {
     // Entry point description - we'll need to declare
     // the function ID and all input/output variables.
     uint32_t              m_entryPointId = 0;
+    bool                  m_hasRawAccessChains = false;
     
     ////////////////////////////////////////////
     // Inter-stage shader interface slots. Also

src/dxbc/dxbc_options.cpp

@@ -27,6 +27,7 @@ namespace dxvk {
       & device->getFormatFeatures(VK_FORMAT_R32_SINT).optimal;
 
     supportsTypedUavLoadR32 = (r32Features & VK_FORMAT_FEATURE_2_STORAGE_READ_WITHOUT_FORMAT_BIT);
+    supportsRawAccessChains = device->features().nvRawAccessChains.shaderRawAccessChains;
 
     switch (device->config().useRawSsbo) {
       case Tristate::Auto:  minSsboAlignment = devInfo.core.properties.limits.minStorageBufferOffsetAlignment; break;

src/dxbc/dxbc_options.h

@@ -27,6 +27,9 @@ namespace dxvk {
     /// on typed UAV loads are required
     bool supportsTypedUavLoadR32 = false;
 
+    /// Determines whether raw access chains are supported
+    bool supportsRawAccessChains = false;
+
     /// Use subgroup operations to reduce the number of
     /// atomic operations for append/consume buffers.
     bool useSubgroupOpsForAtomicCounters = false;