add support for roundingmoderte capability

src/device.cpp

@@ -47,6 +47,8 @@ void cvk_device::init_vulkan_properties(VkInstance instance) {
         VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PCI_BUS_INFO_PROPERTIES_EXT;
     m_subgroup_properties.sType =
         VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_PROPERTIES;
+    m_float_controls_properties.sType =
+        VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FLOAT_CONTROLS_PROPERTIES;
 
     //--- Get maxMemoryAllocationSize for figuring out the  max single buffer
     // allocation size and default init when the extension is not supported
@@ -71,6 +73,8 @@ void cvk_device::init_vulkan_properties(VkInstance instance) {
                          m_subgroup_properties),
             VER_EXT_PROP(VK_MAKE_VERSION(1, 1, 0), nullptr,
                          m_maintenance3_properties),
+            VER_EXT_PROP(VK_MAKE_VERSION(1, 2, 0), nullptr,
+                         m_float_controls_properties),
         };
 #undef VER_EXT_PROP
 
@@ -1038,6 +1042,12 @@ bool cvk_device::supports_capability(spv::Capability capability) const {
         return supports_non_uniform_decoration();
     case spv::CapabilityPhysicalStorageBufferAddresses:
         return m_features_buffer_device_address.bufferDeviceAddress;
+    case spv::CapabilityRoundingModeRTE:
+        return m_float_controls_properties.shaderRoundingModeRTEFloat32 &&
+               (m_float_controls_properties.shaderRoundingModeRTEFloat16 ||
+                !m_features_float16_int8.shaderFloat16) &&
+               (m_float_controls_properties.shaderRoundingModeRTEFloat64 ||
+                !m_features.features.shaderFloat64);
     // Capabilities that have not yet been mapped to Vulkan features:
     default:
         cvk_warn_fn("Capability %d not yet mapped to a feature.", capability);

src/device.hpp

@@ -585,6 +585,7 @@ struct cvk_device : public _cl_device_id,
         m_features_vulkan_memory_model{};
     VkPhysicalDeviceBufferDeviceAddressFeaturesKHR
         m_features_buffer_device_address{};
+    VkPhysicalDeviceFloatControlsProperties m_float_controls_properties{};
 
     VkDevice m_dev;
     std::vector<const char*> m_vulkan_device_extensions;