vulkan: use VkPhysicalDeviceFloatControlsProperties on Vulkan 1.1

"The members of VkPhysicalDeviceVulkan12Properties must have the same
values as the corresponding members of ...
VkPhysicalDeviceFloatControlsProperties ..."

ggml/src/ggml-vulkan/ggml-vulkan.cpp

@@ -4483,6 +4483,9 @@ static vk_device ggml_vk_get_device(size_t idx) {
         device->physical_device = physical_devices[dev_num];
         const std::vector<vk::ExtensionProperties> ext_props = device->physical_device.enumerateDeviceExtensionProperties();
 
+        vk::PhysicalDeviceProperties device_props = device->physical_device.getProperties();
+        const bool device_is_vulkan_12 = device_props.apiVersion >= VK_API_VERSION_1_2;
+
         device->architecture = get_device_architecture(device->physical_device);
 
         const char* GGML_VK_PREFER_HOST_MEMORY = getenv("GGML_VK_PREFER_HOST_MEMORY");
@@ -4509,6 +4512,7 @@ static vk_device ggml_vk_get_device(size_t idx) {
         device->integer_dot_product = false;
         device->shader_64b_indexing = false;
         bool bfloat16_support = false;
+        bool shader_float_controls_khr = false;
 
         for (const auto& properties : ext_props) {
             if (strcmp("VK_KHR_maintenance4", properties.extensionName) == 0) {
@@ -4559,6 +4563,8 @@ static vk_device ggml_vk_get_device(size_t idx) {
             } else if (strcmp("VK_EXT_shader_64bit_indexing", properties.extensionName) == 0) {
                 device->shader_64b_indexing = true;
 #endif
+            } else if (strcmp("VK_KHR_shader_float_controls", properties.extensionName) == 0) {
+                shader_float_controls_khr = true;
             }
         }
 
@@ -4571,6 +4577,7 @@ static vk_device ggml_vk_get_device(size_t idx) {
         vk::PhysicalDeviceShaderCoreProperties2AMD amd_shader_core_properties2_props;
         vk::PhysicalDeviceVulkan11Properties vk11_props;
         vk::PhysicalDeviceVulkan12Properties vk12_props;
+        vk::PhysicalDeviceFloatControlsProperties float_controls_props;
         vk::PhysicalDeviceSubgroupSizeControlPropertiesEXT subgroup_size_control_props;
         vk::PhysicalDeviceShaderIntegerDotProductPropertiesKHR shader_integer_dot_product_props;
         vk::PhysicalDeviceExternalMemoryHostPropertiesEXT external_memory_host_props;
@@ -4578,10 +4585,21 @@ static vk_device ggml_vk_get_device(size_t idx) {
         props2.pNext = &props3;
         props3.pNext = &subgroup_props;
         subgroup_props.pNext = &driver_props;
-        driver_props.pNext = &vk11_props;
-        vk11_props.pNext = &vk12_props;
 
-        VkBaseOutStructure * last_struct = (VkBaseOutStructure *)&vk12_props;
+        VkBaseOutStructure * last_struct;
+
+        if (device_is_vulkan_12) {
+            driver_props.pNext = &vk11_props;
+            vk11_props.pNext = &vk12_props;
+            last_struct = (VkBaseOutStructure *)&vk12_props;
+        } else {
+            if (shader_float_controls_khr) {
+                driver_props.pNext = &float_controls_props;
+                last_struct = (VkBaseOutStructure *)&float_controls_props;
+            } else {
+                last_struct = (VkBaseOutStructure *)&driver_props;
+            }
+        }
 
         if (maintenance4_support) {
             last_struct->pNext = (VkBaseOutStructure *)&props4;
@@ -4679,7 +4697,11 @@ static vk_device ggml_vk_get_device(size_t idx) {
         } else {
             device->shader_core_count = 0;
         }
-        device->float_controls_rte_fp16 = vk12_props.shaderRoundingModeRTEFloat16;
+        if (device_is_vulkan_12) {
+            device->float_controls_rte_fp16 = vk12_props.shaderRoundingModeRTEFloat16;
+        } else {
+            device->float_controls_rte_fp16 = shader_float_controls_khr ? float_controls_props.shaderRoundingModeRTEFloat16 : false;
+        }
 
         device->subgroup_basic = (subgroup_props.supportedStages & vk::ShaderStageFlagBits::eCompute) &&
                                  (subgroup_props.supportedOperations & vk::SubgroupFeatureFlagBits::eBasic);