# VkPhysicalDeviceShaderFmaFeaturesKHR(3) Manual Page

## Name

VkPhysicalDeviceShaderFmaFeaturesKHR - Structure indicating support for SPV_KHR_fma OpFmaKHR

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## C Specification

The `VkPhysicalDeviceShaderFmaFeaturesKHR` structure is defined as:

    // Provided by VK_KHR_shader_fma
    typedef struct VkPhysicalDeviceShaderFmaFeaturesKHR {
        VkStructureType    sType;
        void*              pNext;
        VkBool32           shaderFmaFloat16;
        VkBool32           shaderFmaFloat32;
        VkBool32           shaderFmaFloat64;
    } VkPhysicalDeviceShaderFmaFeaturesKHR;

## Members

This structure describes the following feature:

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `shaderFmaFloat16` indicates whether the implementation supports `OpFmaKHR` for Float16 types in shaders.

- `shaderFmaFloat32` indicates whether the implementation supports `OpFmaKHR` for Float32 types in shaders.

- `shaderFmaFloat64` indicates whether the implementation supports `OpFmaKHR` for Float64 types in shaders.

## Description

If the `VkPhysicalDeviceShaderFmaFeaturesKHR` structure is included in the `pNext` chain of the VkPhysicalDeviceFeatures2 structure passed to vkGetPhysicalDeviceFeatures2, it is filled in to indicate whether each corresponding feature is supported. If the application wishes to use a VkDevice with any features described by `VkPhysicalDeviceShaderFmaFeaturesKHR`, it must add an instance of the structure, with the desired feature members set to `VK_TRUE`, to the `pNext` chain of VkDeviceCreateInfo when creating the VkDevice.

Valid Usage (Implicit)

- VUID-VkPhysicalDeviceShaderFmaFeaturesKHR-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_FMA_FEATURES_KHR`

## See Also

VK_KHR_shader_fma, VkBool32, VkStructureType

## Document Notes

For more information, see the Vulkan Specification.

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0