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

Version History

• Revision 1, 2023-05-16 (Graeme Leese)
  • Initial draft