# VK_KHR_shader_float_controls2(3) Manual Page

## Name

VK_KHR_shader_float_controls2 - device extension

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## Registered Extension Number

529

## Revision

1

## Ratification Status

Ratified

## Extension and Version Dependencies

Vulkan Version 1.1
and
VK_KHR_shader_float_controls

## SPIR-V Dependencies

- SPV_KHR_float_controls2

## Deprecation State

- Promoted to Vulkan 1.4

## Contact

- Graeme Leese [GitHub]gnl21

## Extension Proposal

VK_KHR_shader_float_controls2

## Other Extension Metadata

Last Modified Date

  2023-05-16

Interactions and External Dependencies

  - This extension requires `SPV_KHR_float_controls2`.

Contributors

  - Graeme Leese, Broadcom

## Description

This extension enables use of the more expressive fast floating-point math flags in the SPV_KHR_float_controls2 extension. These flags give finer- grained control over which optimizations compilers may apply, potentially speeding up execution while retaining correct results.

The extension also adds control over the fast-math modes to the GLSL extended instruction set, making these operations more consistent with SPIR-V and allowing their use in situations where floating-point conformance is important.

## New Structures

- Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:

  - VkPhysicalDeviceShaderFloatControls2FeaturesKHR

## New Enum Constants

- `VK_KHR_SHADER_FLOAT_CONTROLS_2_EXTENSION_NAME`

- `VK_KHR_SHADER_FLOAT_CONTROLS_2_SPEC_VERSION`

- Extending VkStructureType:

  - `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_FLOAT_CONTROLS_2_FEATURES_KHR`

## New SPIR-V Capabilities

- FloatControls2

## Promotion to Vulkan 1.4

Functionality in this extension is included in core Vulkan 1.4 with the KHR suffix omitted. The original type, enum and command names are still available as aliases of the core functionality.

## Version History

- Revision 1, 2023-05-16 (Graeme Leese)

  - Initial draft

## See Also

No cross-references are available

## Document Notes

For more information, see the Vulkan Specification

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

## Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0